US20170343829A1 - Head Mounted Display - Google Patents
Head Mounted Display Download PDFInfo
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- US20170343829A1 US20170343829A1 US15/232,818 US201615232818A US2017343829A1 US 20170343829 A1 US20170343829 A1 US 20170343829A1 US 201615232818 A US201615232818 A US 201615232818A US 2017343829 A1 US2017343829 A1 US 2017343829A1
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- light
- image
- module
- redirecting
- light source
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- G02B27/2264—
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
- G02B30/24—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type involving temporal multiplexing, e.g. using sequentially activated left and right shutters
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/001—Eyepieces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
- G02B26/0833—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/14—Beam splitting or combining systems operating by reflection only
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/14—Beam splitting or combining systems operating by reflection only
- G02B27/143—Beam splitting or combining systems operating by reflection only using macroscopically faceted or segmented reflective surfaces
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- G02B27/2235—
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/34—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers
- G02B30/35—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers using reflective optical elements in the optical path between the images and the observer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0132—Head-up displays characterised by optical features comprising binocular systems
- G02B2027/0134—Head-up displays characterised by optical features comprising binocular systems of stereoscopic type
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0132—Head-up displays characterised by optical features comprising binocular systems
- G02B2027/0136—Head-up displays characterised by optical features comprising binocular systems with a single image source for both eyes
Definitions
- the present disclosure relates to a head mounted display. More particularly, the present disclosure relates to a stereo head mounted display.
- a head mounted display can respectively provide different images to two eyes of an observer, and the eyes of the observer can respectively receive different image information, so that the observer can perceive a stereoscopic image by exploiting the binocular parallax of typical human sight.
- a conventional head mounted display has a complex structure, a huge size and a heavy weight, which may affect wearing convenience and comfort of the observer.
- the disclosure provides a head mounted display, which can reduce a horizontal area of the head mounted display, and can improve a convenience and a comfort of wearing the head mounted display.
- a head mounted display includes a first light source module, a second light source module, a light reversely turning module, an image output module, a first eyepiece module, a second eyepiece module and a beam splitting mirror.
- the first light source is configured to emit a first light.
- the second light source module is configured to emit a second light.
- the image output module is configured to receive the first light and the second light, and to respectively generate a first image light and a second image light with corresponding image information.
- the light reversely turning module is optically coupled between the first light source module and the image output module, making a propagating direction of the first light in reverse to a propagating direction of the first image light.
- the light reversely turning module is optically coupled between the second light source module and the image output module, making a propagating direction of the second light L 2 reverse to a propagating direction of the second image light.
- the first eyepiece module is configured to make the first image light image to a first target position.
- the second eyepiece module is configured to make the second image light image to a second target position.
- the beam splitting mirror is optically coupled between the image output module and the first eyepiece module, and the beam splitting mirror is configured to guide the first image light into the first eyepiece module.
- the beam splitting mirror is optically coupled between the image output module and the second eyepiece module, and the beam splitting mirror is configured to guide the second image light into the second eyepiece module.
- the head mounted display can respectively provide two eyes of an observer with the different image information (that is, the first image light and the second image light), and then the different image information received by the two eyes of the observer may be combined in a brain of the observer, so that the observer can perceive a stereoscopic image.
- the light reversely turning module may make the propagating direction of the first light in reverse to the propagating direction of the first image light, so the first light source module and the image output module may be located on different level heights.
- the light reversely turning module may make the propagating direction of the second light in reverse to the propagating direction of the second image light, so the second light source module and the image output module may be located on different level heights. Therefore, the horizontal area of the head mounted display may be reduced, benefiting to minimize the size of the head mounted display.
- FIG. 1 is a perspective view of a head mounted display in accordance with some embodiments of the present disclosure.
- FIG. 2 is an enlarged cross-section view of a local area R of the FIG. 1 .
- FIG. 3 is a top view of the head mounted display in accordance with some embodiments of the present disclosure.
- FIG. 4 is a schematic diagram showing an optical path of the head mounted display at a first time point in accordance with some embodiments of the present disclosure.
- FIG. 5 is a schematic diagram showing an optical path of the head mounted display at a second time point in accordance with some embodiments of the present disclosure.
- spatially relative terms such as “beneath,” “below,” “lower,” “above,” “upper” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures.
- the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
- the apparatus may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein may likewise be interpreted accordingly.
- the term “device A is optically coupled to device B” indicates a light from or through the device A can directly propagate into the device B, and if a light from or through the device A can propagate into the device B, the other optical devices can be interposed between the device A and the device B.
- the term “device A is optically coupled between device B and device C” indicates a light can propagate into the device A, device B and device C, and other optical devices can be interposed between the device A, device B and the device C.
- FIG. 1 is a perspective view of a head mounted display in accordance with some embodiments of the present disclosure.
- a head mounted display 10 includes a first light source module 100 , a second light source module 200 , a light reversely turning module 300 , an image output module 400 , a first eyepiece module 500 , a second eyepiece module 600 and a beam splitting mirror 700 .
- the first light source 100 is configured to emit a first light L 1 .
- the second light source module 200 is configured to emit a second light L 2 .
- the image output module 400 is configured to receive the first light L 1 and the second light L 2 , and to respectively generate a first image light I 1 and a second image light I 2 with corresponding image information.
- the light reversely turning module 300 is optically coupled between the first light source module 100 and the image output module 400 , for making a propagating direction of the first image light I 1 in reverse to a propagating direction of the first light L 1 .
- the light reversely turning module 300 is optically coupled between the second light source module 200 and the image output module 400 , for making a propagating direction of the second image light I 2 in reverse to a propagating direction of the second light L 2 .
- the first eyepiece module 500 is configured to make the first image light I 1 image to a first target position P 1 .
- the second eyepiece module 600 is configured to make the second image light I 2 image to a second target position P 2 .
- the beam splitting mirror 700 is optically coupled between the image output module 400 and the first eyepiece module 500 , and the beam splitting mirror 700 is configured to guide the first image light I 1 into the first eyepiece module 500 .
- the beam splitting mirror 700 is optically coupled between the image output module 400 and the second eyepiece module 600 , and the beam splitting mirror 700 is configured to guide the second image light I 2 into the second eyepiece module 600 .
- the head mounted display 10 can respectively provide two eyes of an observer with the different image information (that is, the first image light I 1 and the second image light I 2 ), and then the different image information received by the two eyes of the observer may be combined in a brain of the observer, so that the observer can perceive a stereoscopic image.
- the first light L 1 when the first light source module 100 emits the first light L 1 , the first light L 1 may propagate along a first direction D 1 (that is, propagating from the left to the right as shown in the figure).
- the propagating direction of the first light L 1 may be changed by the light reversely turning module 300 for making the first light L 1 redirected to the image output module 400 .
- the image output module 400 receives the first light L 1 and generates the first image light I 1 propagating along a second direction D 2 (that is, propagating from the right to the left as shown in the figure).
- the light reversely turning module 300 can change an optical path of the first light L 1 for making the first light L 1 emitted by the first light source module 100 redirected and arrive at the image output module 400 . More particularly, in some embodiments, as shown in FIG. 1 , the propagating direction of the first light L 1 may be changed from the first direction D 1 (from the left to the right) into a third direction D 3 (from the bottom to the top), and then changed into the first direction D 1 (from the left to the right) for going into the image output module 400 . Similarly, when the second light source module 200 emits the second light L 2 , the second light L 2 may propagate along the first direction D 1 (that is, propagating from the left to the right as shown in the figure).
- the propagating direction of the second light L 2 may be changed by the light reversely turning module 300 for making the second light L 2 redirected to the image output module 400 .
- the image output module 400 receives the second light L 2 and generates the second image light I 2 propagating along a second direction D 2 (that is, propagating from the right to the left as shown in the figure).
- the light reversely turning module 300 can change an optical path of the second light L 2 for making the second light L 2 emitted by the second light source module 200 redirected and arrive at the image output module 400 .
- the optical path of the first light L 1 may be changed by the light reversely turning module 300 , so the first light source module 100 and the image output module 400 may be located on different level heights.
- the optical path of the second light L 2 may be changed by the light reversely turning module 300 , so the second light source module 200 and the image output module 400 may be located on different level heights. Therefore, a horizontal area of the head mounted display 10 may be reduced, benefiting to minimize the head mounted display 10 .
- the first light source module 100 is located on a level height h 1
- the second light source module 200 is located on a level height h 2
- the image output module 400 is located on a level height h 3 , in which the level height h 3 is larger than the level height h 2 , and the level height h 3 is larger than the level height h 1 .
- the first light source module 100 and the second light source module 200 is located below the image output module 400 (as shown in FIG. 1 , the first light source module 100 and the second light source module 200 may be located on a lower left of the image output module 400 ), which may benefit to minimize the horizontal area of the head mounted display 10 .
- the first light source module 100 and the second light source module 200 may be underlying the first eyepiece module 500 and the second eyepiece module 600 , so as to minimize the he horizontal area of the head mounted display 10 .
- the level height h 1 where the first light source module 100 is located is substantially equal to the level height h 2 where the second light source module 200 is located.
- the first light source module 100 and the second light source module 200 are located on the substantially equal level height, thereby benefiting to minimize a thickness of the head mounted display 10 .
- the first light source module 100 may include a solid-state light source array 110 .
- the second light source module 200 may include a solid-state light source array 210 .
- the solid-state light source arrays 110 and 210 may include at least one solid-state light source, but is not limited to be, such as a red light source, a green light source or a blue light source, and it may be a light emitting diode or an organic light emitting diode.
- the first light L 1 emitted by the solid-state light source array 110 of the first light source module 100 is substantially a collimated light, that is, a divergence angle of the first light L 1 is close to zero.
- the image output module 400 may generate the substantially collimated first image light I 1 , so the first image light I 1 may be precisely guided into the first target position P 1 through the first eyepiece module 500 avoiding the first image light I 1 shifting from the first target position P 1 to the second target position P 2 .
- the second light L 2 emitted by the solid-state light source array 210 of the second light source module 200 is substantially a collimated light, that is, a divergence angle of the second light L 2 is close to zero.
- the image output module 400 may generate the substantially collimated second image light I 2 , so the second image light I 2 may be precisely guided into the second target position P 2 through the second eyepiece module 600 avoiding the second image light I 2 shifting from the second target position P 2 to the first target position P 1 .
- the first light source module 100 and the second light source module 200 may also include tapered rods 120 and 220 , and may include ball lenses 130 and 230 configured to adjust the intensity and the uniformity of lights, thereby improving an image quality of the head mounted display 10 .
- the light reversely turning module has a first light-redirecting unit 310 and a second light-redirecting unit 320
- the first light-redirecting unit 310 is configured to reflect and redirect the first light L 1 from the first light source module 100 and the second light L 2 from the second light source module 200 to the second light-redirecting unit 320
- the second light-redirecting unit 320 is configured to reflect and redirect the first light L 1 and the second light L 2 from the first light-redirecting unit 310 into the image output module 400 .
- the first light-redirecting unit 310 has a reflective surface 312 .
- a distance between the reflective surface 312 and the first light source module 100 is increasing along a direction towards the second light-redirecting unit 320 , thereby benefiting to reflect and redirect the first light L 1 to the second light-redirecting unit 320 .
- the reflective surface 312 has a normal vector N 1 being towards the top left of the figure. Accordingly, when the first light L 1 propagates along the first direction D 1 and arrives at the reflective surface 312 of the first light-redirecting unit 310 , the first light L 1 may be reflected by the reflective surface 312 and propagate towards the second light-redirecting unit 320 along the third direction D 3 .
- the first light L 1 when the first light L 1 propagates along the third direction D 3 and goes into the second light-redirecting unit 320 , the first light L 1 can be reflected and redirected by a certain surface of the second light-redirecting unit 320 for propagating towards the image output module 400 along the first direction D 1 , so the first light L 1 can arrive at the image output module 400 .
- a distance between the reflective surface 312 and the second light source module 200 (such as the ball lens 230 of the second light source module 200 ) is increasing along a direction towards the second light-redirecting unit 320 , thereby benefiting to reflect and redirect the second light L 2 to the second light-redirecting unit 320 .
- the second light L 2 when the second light L 2 propagates along the first direction D 1 and arrives at the reflective surface 312 of the first light-redirecting unit 310 , the second light L 2 may be reflected by the reflective surface 312 and propagate towards the second light-redirecting unit 320 along the third direction D 3 . Then, when the second light L 2 propagates along the third direction D 3 and goes into the second light-redirecting unit 320 , the second light L 2 can be reflected and redirected by the certain surface of the second light-redirecting unit 320 for propagating towards the image output module 400 along the first direction D 1 , so the second light L 2 can arrive at the image output module 400 .
- the first light-redirecting unit 310 and the second light-redirecting unit 320 may be redirected at least two times, so the image output module 400 can be disposed on the level height being different from the level height where the first light source module 100 and the second light source 200 are disposed (for example, the image output module 400 is disposed on the top right in FIG. 1 ), thereby minimizing the horizontal area of the head mounted display 10 .
- the first light-redirecting unit 310 may be a reflected mirror, which may be, but is not limited to be, a reflected mirror with an aluminum coating, a reflected mirror with a metal coating, a reflected mirror with a high reflectivity material, so as to redirect the first light L 1 and the second light L 2 to the second light-redirecting unit 320 more effectively.
- FIG. 2 is an enlarged cross-section view of a local area R of the FIG. 1 .
- the second light-redirecting unit 320 has a redirecting surface 322
- the redirecting surface 322 is configured to reflect and redirect the first light L 1 and the second light L 2 from the first light-redirecting unit 310 to the image output module 400
- the first image light I 1 and the second image light I 2 generated by the image output module 400 may propagate into the redirecting surface 322
- an incident angle of the first image light L 1 and an incident angle of the second image light L 2 at the redirecting surface 322 is less than a critical angle of the redirecting surface.
- the critical angle is a least angle of incidence arriving at the redirecting surface 322 of the second light-redirecting unit 320 above which the total internal reflection occurs.
- the first light L 1 when the first light L 1 arrives at the redirecting surface 322 of the second light-redirecting unit 320 , the first light L 1 can be reflected and redirected to the image output module 400 . Then, the image output module 400 receives the first light L 1 and generates the first image light I 1 with the image information, since the incident angle of the first image light I 1 at the redirecting surface 322 is design to being less than the critical angle, the first image light I 1 may not be totally reflected, and the first image light I 1 may penetrate the second light-redirecting unit 320 , thereby benefiting to guide the first image light I 1 into the beam splitting mirror 700 .
- the second light L 2 arrives at the redirecting surface 322 of the second light-redirecting unit 320 , the second light L 2 can be reflected and redirected to the image output module 400 . Then, the image output module 400 receives the second light L 2 and generates the second image light I 2 with the image information, since the incident angle of the second image light I 2 at the redirecting surface 322 is design to being less than the critical angle, the second image light I 2 may not be totally reflected, and the second image light I 2 may penetrate the second light-redirecting unit 320 , thereby benefiting to guide the second image light I 2 into the beam splitting mirror 700 .
- the second light-redirecting unit 320 may be, but is not limited to be, a totally internal reflection prism, so as to separate the first light L 1 and the first image light I 1 more effectively, and also to separate the second light L 2 and the second image light I 2 more effectively.
- the incident angles of the first light L 1 and the second light L 2 arriving at the image output module 400 or designs of the emitting angles of the first image light I 1 and the second image light I 2 generated by the image output module 400 , so the incident angles of the first image light I 1 and the second image light I 2 at the redirecting surface 322 is less than the critical angle of the redirecting surface 322 , but it is not limited.
- the light reversely turning module 300 further includes a penetrate assist unit 330 .
- the penetrate assist unit 330 is abutted against the redirecting surface 322 of the second light-redirecting unit 320 , and the penetrate assist unit 330 and the second light-redirecting unit 320 may have different refractive indexes to make the first light L 1 and the second light L 2 propagating at the redirecting surface 322 reflected totally, and make at least one part of the first image light I 1 and the second image light I 2 penetrate the redirecting surface 322 . More particularly, in some embodiments, as shown in FIG.
- the penetrate assist unit 330 may include a connect surface 332 , the connect surface 332 is connected to the redirecting surface 322 of the second light-redirecting unit 320 , and a refractive index n 1 of the penetrate assist unit 330 is less than a refractive index n 2 of the second light-redirecting unit 320 .
- the first light L 1 (or the second light L 2 ) from the first light-redirecting unit 310 is transmitted to the redirecting surface 322 of the second light-redirecting unit 320 , since the refractive index n 1 of the penetrate assist unit 330 is less than the refractive index n 2 of the second light-redirecting unit 320 , and the incident angle of the first light L 1 (or the second light I 2 ) is designed to be larger than the critical angle(arcsin(n/n 2 )), the first light L 1 (or the second light L 2 ) may be totally reflected at the redirecting surface 322 .
- the first light L 1 (or the second light L 2 ) may not penetrate the second light-redirecting unit 320 , that is, the first light L 1 (or the second light I 2 ) may be totally reflected to the image output module 400 .
- the position of the first light source module 100 relative to the image output module 400 the position of the second light source module 200 relative to the image output module 400 , the position of the first light-redirecting unit 310 relative to the image output module 400 , an angle formed between the normal vector N 1 of the first light-redirecting unit 310 and the first light L 1 or the second light L 2 , or an arranged location of the second light-redirecting unit 320 , so the incident angle of the first light L 1 (or the second light L 2 ) at the redirecting surface 322 may be larger than the critical angle of the redirecting surface 322 .
- the emitting angle of the first image light I 1 is designed to make the incident angle of the first image light I 1 arriving at the redirecting surface 322 be less than the critical angle(arcsin(n 1 /n 2 )), so the first image light I 1 may penetrate the redirecting surface 322 .
- the emitting angle of the second image light I 2 is designed to make the incident angle of the second image light I 2 arriving at the redirecting surface 322 be less than the critical angle(arcsin(n 1 /n 2 )), so the second image light I 2 may penetrate the redirecting surface 322 .
- the incident angle of the first light L 1 arriving at the image output module 400 can be different from the incident angle of the second light L 2 arriving at the image output module 400 , so the emitting angle of the first image light I 1 generated by the image output module 400 can be different from the emitting angle of the second image light I 2 generated by the image output module 400 , thereby benefiting to guide the first image light I 1 into the first target position P 1 and benefiting to guide the second image light I 2 into the second target position P 2 .
- another devices can be applied to separate the optical path of the first light L 1 and the optical path of the first image light I 1 generated by the image output module 400 , and to separate the optical path of the second light L 2 and the optical path of the second image light I 2 generated by the image output module 400 .
- the image output module 400 includes a silicon-based liquid crystal cell
- the first light L 1 and the second light L 2 may be converted into the first image light I 1 and the second image light I 2 with different polarization
- the second light-redirecting unit 320 may include a polarized beam splitter and a quarter-wave plate, so as to separate the optical paths of the first image light I 1 and the second image light I 2 .
- the image output module 400 is a digital micro-mirror device configured to reflect and make the first light L 1 from the second light-redirecting unit 320 become the first image light I 1 with the image information, and to reflect and make the second light L 2 from the second light-redirecting unit 320 become the second image light I 2 with the image information.
- the digital micro-mirror device may include a plurality of micro reflected mirrors, so the reflected direction of the light received by each micro reflected mirror can be controlled.
- Each micro reflected mirror represents an image pixel, and each micro reflected mirror can be driven by a control device, so the micro reflected mirror can be rotated to a corresponding angle, thereby benefiting to reflect a light to a predetermined position.
- the micro reflected mirrors can be rotated to a first group angle, so as to receive the first light L 1 and to reflect the first light L 1 to become the first image light I 1 with the image information.
- the second light L 2 is redirected to the digital micro-mirror device by the second light-redirecting unit 320
- some of the micro reflected mirrors can be rotated to a second group angle, so as to receive the second light L 2 and to reflect the second light L 2 to become the second image light I 2 with the image information.
- the first group angle may be different from the second group angle, so the digital micro-mirror device may generate the different emitting angles for the first image light I 1 and the second image light I 2 in a reflecting manner. That is, the digital micro-mirror device may generate different optical paths of the first image light I 1 and the second image light I 2 , which may benefit to precisely transmit the first image light I 1 to the first eyepiece module 500 by the beam splitting mirror 700 , and benefit to precisely transmit the second image light I 2 to the second eyepiece module 600 by the beam splitting mirror 700 .
- the image output module 400 when the image output module 400 is the digital micro-mirror device, it may separate the optical paths of the first image light I 1 and the second image light I 2 more effectively, avoiding the first image light I 1 and the second image light I 2 from interfering with each other and reflecting the first image light I 1 and the second image light I 2 to the first eyepiece module 500 and the second eyepiece module 600 more precisely.
- the image output module 400 may be a tilt and roll pixel digital micro-mirror device, so as to separate the optical paths of the first image light I 1 and the second image light I 2 more effectively.
- the first light L 1 emitted by the first light source module 100 propagate along the first direction D 1
- the second light L 2 emitted by the second light source module 200 propagate along the first direction D 1
- the image output module 400 reflects the first image light I 1 and the second image light I 2 with the corresponding image information.
- the image output module 400 is designed to reflect and generate the first image light I 1 (or the second image light I 2 ) propagating along the second direction D 2 , in which the first direction D 1 is reverse to the second direction D 2 .
- a difference between the propagating direction of the first light L 1 (or the second light L 2 ) and the propagating direction of the first image light I 1 (or the second image light I 2 ) is 180 degrees.
- the beam splitting mirror 700 may include a first beam splitting unit 710 and a second beam splitting unit 720 , and the first beam splitting unit 710 is abutted against the second beam splitting unit 720 .
- the first beam splitting unit 710 has a first beam splitting surface 712 and a first rear surface 714 opposite to each other
- the second beam splitting unit 720 has a second beam splitting surface 722 and a second rear surface 724 opposite to each other, and the first rear surface 714 and the second rear surface 724 are facing to each other and form an acute angle.
- the first beam splitting surface 712 is farther away from the first target position P 1 than the first rear surface 714 being, and the second beam splitting surface 722 is farther away from the second target position P 2 than the second rear surface 724 being.
- the first beam splitting surface 712 is located on the optical path of the first image light I 1 , so as to redirect the first image light I 1 to the first eyepiece module 500 .
- the second beam splitting surface 722 is located on the optical path of the second image light I 2 , so as to redirect the second image light I 2 to the second eyepiece module 600 .
- the first image light I 1 and the second image light I 2 may be respectively redirected to the first eyepiece module 500 and the second eyepiece module 600 by the beam splitting mirror 700 .
- the head mounted display 10 may further include a lens group 420 , the lens group 420 is optically coupled between the image output module 400 and the beam splitting mirror 700 , and the lens group 420 is configured to adjust qualities of images of the first image light I 1 and the second image light I 2 .
- a refractive power or another optical parameters of each lens of the lens group 420 may be designed to eliminate a distortion of the first image light I 1 and the second image light I 2 generated by the image output module 400 , which may assist to improve the quality of the first image light I 1 imaging to the first target position P 1 and to improve the quality of the second image light I 2 imaging to the second target position P 2 .
- the first eyepiece module 500 may include a partially light reflective unit 510 and an image-reflected mirror 520 .
- the partially light reflective unit 510 is optically coupled between the first beam splitting unit 710 of the beam splitting mirror 700 and the image-reflected mirror 520 .
- the first image light I 1 may be redirected and guided into the partially light reflective unit 510 in a reflecting manner, and then the partially light reflective unit 510 may redirect a part of the first image light I 1 to the image-reflected mirror 520 in a reflecting manner thereby forming a first intermediate image, and the first intermediate image is projected to the first target position P 1 by a first eyepiece 530 .
- the second eyepiece module 600 may include a partially light reflective unit 610 and an image-reflected mirror 620 .
- the partially light reflective unit 610 is optically coupled between the second beam splitting unit 720 of the beam splitting mirror 700 and the image-reflected mirror 620 .
- the second image light I 2 may be redirected and guided into the partially light reflective unit 610 in a reflecting manner, and then the partially light reflective unit 610 may redirect a part of the second image light I 2 to the image-reflected mirror 620 in a reflecting manner thereby forming a second intermediate image, and the second intermediate image is projected to the second target position P 2 by a second eyepiece 630 .
- the partially light reflective units 510 and 610 may be, but is not limited to be, beam-splitters or totally internal reflection prisms to redirect the first image light I 1 (or the second image light I 2 ) to the image-reflected mirror 520 (or the image-reflected mirror 620 ).
- another devices can be applied to redirect the first image light I 1 from the beam splitting mirror 700 to the first eyepiece 530 , and redirect the second image light I 2 from the beam splitting mirror 700 to the second eyepiece 630 .
- the partially light reflective units 510 and 610 may include a polarized beam splitter and a quarter-wave plate.
- the first beam splitting surface 712 and the second beam splitting surface 722 may intersect at a ridge R.
- the imaginary plane 730 may include a first imaginary plane 732 and a second imaginary plane 734 that intersect at the ridge R.
- the first imaginary plane 732 and the first beam splitting surface 712 respectively have peripheries 7322 and 7122 distal to the ridge R.
- the peripheries 7322 and 7122 are aligned in a line perpendicular to the imaginary plane 730 .
- the second imaginary plane 734 and the second beam splitting surface 722 respectively have peripheries 7342 and 7222 distal to the ridge R.
- the peripheries 7342 and 7222 are aligned in a line perpendicular to the imaginary plane 730 .
- the first image light I 1 may be propagated to the first beam splitting surface 712 through a center of the first imaginary plane 732 .
- the second image light I 2 may be propagated to the second beam splitting surface 722 through a center of the second imaginary plane 734 .
- the first image lights I 1 may converge at the center of the first imaginary plane 732
- the second image lights I 2 may converge at the center of the second imaginary plane 734 .
- the first light source module 100 and the second light source module 200 emit lights in a time sequence. In other words, the first light source module 100 and the second light source module 200 alternately emit lights according to the time sequence.
- FIG. 4 is a schematic diagram showing an optical path of the head mounted display 10 at a first time point in accordance with some embodiments of the present disclosure. For example, as shown in FIG. 1 and FIG.
- FIG. 5 is a schematic diagram showing an optical path of the head mounted display 10 at a second time point in accordance with some embodiments of the present disclosure. For example, as shown in FIG. 1 and FIG.
- the second light source module 200 emits the second light L 2 , the second light L 2 is redirected to the image output module 400 by the light reversely turning module 300 for generating the second image light I 2 , and the second image light I 2 is guided into the second target position P 2 (such as a right eye of the observer) by the beam splitting mirror 700 and the second eyepiece module 600 .
- the corresponding first image light I 1 and the second image light I 2 may be respectively imaged to the first target position P 1 and the second target position P 2 in the time sequence, so as to achieve a stereoscopic display of the head mounted display 10 .
- the head mounted display 10 of the present disclosure uses a time-multiplex way to switch the first light source module 100 and the second light source module 200 in the time sequence, so the head mounted display 10 can provide a stereoscopic image.
- the image output module 400 provides a plurality of reflected patterns in the time sequence, and the first light source module 100 and the second light source module 200 switched substantially synchronizes with the reflected patterns switched. More particularly, in some embodiments, the reflected patterns can be classified as a first group of reflected patterns and a second group of reflected patterns, and the first group of reflected patterns and the second group of reflected patterns are switched in the time sequence, that is, the image output module 400 alternately provides the first group of reflected patterns and the second group of reflected patterns according to the time sequence.
- the first light source emits the first light L 1 to the image output module 400 , and the image output module 400 substantially provides the first group of reflected patterns in synchronization, so the image output module 400 receives the first light L 1 and generates the first image light I 1 with the image information of the first group of reflected patterns.
- the second light source emits the second light L 2 to the image output module 400 , and the image output module 400 substantially provides the second group of reflected patterns in synchronization, so the image output module 400 receives the second light L 2 and generates the second image light I 2 with the image information of the second group of reflected patterns.
- the first light source module 100 may be controlled to emit light, and the second light source module 200 may be controlled to not emit light, and the image output module 400 may be controlled to provide the first group of reflected patterns.
- the first light source module 100 may be controlled to not emit light, and the second light source module 200 may be controlled to emit light, and the image output module 400 may be controlled to provide the second group of reflected patterns.
- the first light L 1 generated by the first light source module 100 substantially synchronizes with the first group of reflected patterns generated by the image output module 400 , so as to generate the first image light I 1 with the corresponding correct image information, which may benefit to image the first image light I 1 to the first target position P 1 .
- the second light L 2 generated by the second light source module 200 substantially synchronizes with the second group of reflected patterns generated by the image output module 400 , so as to generate the second image light I 2 with the corresponding correct image information, which may benefit to image the second image light I 2 to the second target position P 1 .
- the head mounted display 10 may respectively provide the first image light I 1 and the second image light I 2 to a left eye and a right eye of an observer in the time sequence, so as to generate a stereoscopic image.
- the light reversely turning module 300 may make the propagating direction of the first light L 1 in reverse to the propagating direction of the first image light I 1 , so the first light source module 100 and the image output module 400 may be located on different level heights.
- the light reversely turning module 300 may make the propagating direction of the second light L 2 in reverse to the propagating direction of the second image light I 2 , so the second light source module 200 and the image output module 400 may be located on different level heights. Therefore, the horizontal area of the head mounted display 10 may be reduced, benefiting to minimize the size of the head mounted display 10 .
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Abstract
A head mounted display includes first and second light source modules, a light reversely turning module, an image output module, first and second eyepiece modules, and a beam splitting mirror. The first and second light source modules are respectively configured to emit first and second lights. The image output module is configured to receive the first and second lights, generating first and second image lights with corresponding image information respectively. The light reversely turning module is optically coupled between the first light source module (or the second light source module) and the image output module, making a propagating direction of the first light (or the second light) in reverse to that of the first image light (or the second light). The beam splitting mirror is optically coupled between the image output module and the first/second eyepiece module, guiding the first/second image light into the first/second eyepiece module.
Description
- This application claims priority to Taiwan Application Serial Number 105116194, filed May 25, 2016, which is herein incorporated by reference.
- The present disclosure relates to a head mounted display. More particularly, the present disclosure relates to a stereo head mounted display.
- In recent years, with the increasing development of virtual reality technology, an optical product which can show a stereoscopic image has become a focal point in the consumer market. Conventionally, a head mounted display can respectively provide different images to two eyes of an observer, and the eyes of the observer can respectively receive different image information, so that the observer can perceive a stereoscopic image by exploiting the binocular parallax of typical human sight. However, a conventional head mounted display has a complex structure, a huge size and a heavy weight, which may affect wearing convenience and comfort of the observer.
- The disclosure provides a head mounted display, which can reduce a horizontal area of the head mounted display, and can improve a convenience and a comfort of wearing the head mounted display.
- In accordance with some embodiments of the present disclosure, a head mounted display includes a first light source module, a second light source module, a light reversely turning module, an image output module, a first eyepiece module, a second eyepiece module and a beam splitting mirror. The first light source is configured to emit a first light. The second light source module is configured to emit a second light. The image output module is configured to receive the first light and the second light, and to respectively generate a first image light and a second image light with corresponding image information. The light reversely turning module is optically coupled between the first light source module and the image output module, making a propagating direction of the first light in reverse to a propagating direction of the first image light. Similarly, the light reversely turning module is optically coupled between the second light source module and the image output module, making a propagating direction of the second light L2 reverse to a propagating direction of the second image light. The first eyepiece module is configured to make the first image light image to a first target position. Similarly, the second eyepiece module is configured to make the second image light image to a second target position. The beam splitting mirror is optically coupled between the image output module and the first eyepiece module, and the beam splitting mirror is configured to guide the first image light into the first eyepiece module. Similarly, the beam splitting mirror is optically coupled between the image output module and the second eyepiece module, and the beam splitting mirror is configured to guide the second image light into the second eyepiece module.
- In one or more embodiments of this disclosure, since a configuration of the first light source module, the second light source module and the beam splitting mirror, the head mounted display can respectively provide two eyes of an observer with the different image information (that is, the first image light and the second image light), and then the different image information received by the two eyes of the observer may be combined in a brain of the observer, so that the observer can perceive a stereoscopic image. Furthermore, the light reversely turning module may make the propagating direction of the first light in reverse to the propagating direction of the first image light, so the first light source module and the image output module may be located on different level heights. Similarly, the light reversely turning module may make the propagating direction of the second light in reverse to the propagating direction of the second image light, so the second light source module and the image output module may be located on different level heights. Therefore, the horizontal area of the head mounted display may be reduced, benefiting to minimize the size of the head mounted display.
- It is to be understood that both the foregoing general description and the following detailed description are by examples, and are intended to provide further explanation of the invention as claimed.
- Aspects of the present disclosure are best understood from the following detailed description when read with the accompanying figures. It is noted that, in accordance with the standard practice in the industry, various features are not drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion.
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FIG. 1 is a perspective view of a head mounted display in accordance with some embodiments of the present disclosure. -
FIG. 2 is an enlarged cross-section view of a local area R of theFIG. 1 . -
FIG. 3 is a top view of the head mounted display in accordance with some embodiments of the present disclosure. -
FIG. 4 is a schematic diagram showing an optical path of the head mounted display at a first time point in accordance with some embodiments of the present disclosure. -
FIG. 5 is a schematic diagram showing an optical path of the head mounted display at a second time point in accordance with some embodiments of the present disclosure. - Reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.
- Further, spatially relative terms, such as “beneath,” “below,” “lower,” “above,” “upper” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The apparatus may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein may likewise be interpreted accordingly. Furthermore, the term “device A is optically coupled to device B” indicates a light from or through the device A can directly propagate into the device B, and if a light from or through the device A can propagate into the device B, the other optical devices can be interposed between the device A and the device B. Similarly, the term “device A is optically coupled between device B and device C” indicates a light can propagate into the device A, device B and device C, and other optical devices can be interposed between the device A, device B and the device C.
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FIG. 1 is a perspective view of a head mounted display in accordance with some embodiments of the present disclosure. As shown inFIG. 1 , a head mounteddisplay 10 includes a firstlight source module 100, a secondlight source module 200, a light reversely turningmodule 300, animage output module 400, afirst eyepiece module 500, asecond eyepiece module 600 and abeam splitting mirror 700. The firstlight source 100 is configured to emit a first light L1. The secondlight source module 200 is configured to emit a second light L2. Theimage output module 400 is configured to receive the first light L1 and the second light L2, and to respectively generate a first image light I1 and a second image light I2 with corresponding image information. The light reversely turningmodule 300 is optically coupled between the firstlight source module 100 and theimage output module 400, for making a propagating direction of the first image light I1 in reverse to a propagating direction of the first light L1. Similarly, the light reversely turningmodule 300 is optically coupled between the secondlight source module 200 and theimage output module 400, for making a propagating direction of the second image light I2 in reverse to a propagating direction of the second light L2. Thefirst eyepiece module 500 is configured to make the first image light I1 image to a first target position P1. Similarly, thesecond eyepiece module 600 is configured to make the second image light I2 image to a second target position P2. Thebeam splitting mirror 700 is optically coupled between theimage output module 400 and thefirst eyepiece module 500, and thebeam splitting mirror 700 is configured to guide the first image light I1 into thefirst eyepiece module 500. Similarly, thebeam splitting mirror 700 is optically coupled between theimage output module 400 and thesecond eyepiece module 600, and thebeam splitting mirror 700 is configured to guide the second image light I2 into thesecond eyepiece module 600. By such a configuration, the head mounteddisplay 10 can respectively provide two eyes of an observer with the different image information (that is, the first image light I1 and the second image light I2), and then the different image information received by the two eyes of the observer may be combined in a brain of the observer, so that the observer can perceive a stereoscopic image. - More particularly, in some embodiments, as shown in
FIG. 1 , when the firstlight source module 100 emits the first light L1, the first light L1 may propagate along a first direction D1 (that is, propagating from the left to the right as shown in the figure). When the first light L1 arrives at the light reversely turningmodule 300, the propagating direction of the first light L1 may be changed by the light reversely turningmodule 300 for making the first light L1 redirected to theimage output module 400. Then, theimage output module 400 receives the first light L1 and generates the first image light I1 propagating along a second direction D2 (that is, propagating from the right to the left as shown in the figure). In other words, the light reversely turningmodule 300 can change an optical path of the first light L1 for making the first light L1 emitted by the firstlight source module 100 redirected and arrive at theimage output module 400. More particularly, in some embodiments, as shown inFIG. 1 , the propagating direction of the first light L1 may be changed from the first direction D1 (from the left to the right) into a third direction D3 (from the bottom to the top), and then changed into the first direction D1 (from the left to the right) for going into theimage output module 400. Similarly, when the secondlight source module 200 emits the second light L2, the second light L2 may propagate along the first direction D1 (that is, propagating from the left to the right as shown in the figure). When the second light L2 arrives at the light reversely turningmodule 300, the propagating direction of the second light L2 may be changed by the light reversely turningmodule 300 for making the second light L2 redirected to theimage output module 400. Then, theimage output module 400 receives the second light L2 and generates the second image light I2 propagating along a second direction D2 (that is, propagating from the right to the left as shown in the figure). In other words, the light reversely turningmodule 300 can change an optical path of the second light L2 for making the second light L2 emitted by the secondlight source module 200 redirected and arrive at theimage output module 400. Accordingly, the optical path of the first light L1 may be changed by the light reversely turningmodule 300, so the firstlight source module 100 and theimage output module 400 may be located on different level heights. Similarly, the optical path of the second light L2 may be changed by the light reversely turningmodule 300, so the secondlight source module 200 and theimage output module 400 may be located on different level heights. Therefore, a horizontal area of the head mounteddisplay 10 may be reduced, benefiting to minimize the head mounteddisplay 10. - For example, as shown in
FIG. 1 , the firstlight source module 100 is located on a level height h1, and the secondlight source module 200 is located on a level height h2, and theimage output module 400 is located on a level height h3, in which the level height h3 is larger than the level height h2, and the level height h3 is larger than the level height h1. In other words, the firstlight source module 100 and the secondlight source module 200 is located below the image output module 400 (as shown inFIG. 1 , the firstlight source module 100 and the secondlight source module 200 may be located on a lower left of the image output module 400), which may benefit to minimize the horizontal area of the head mounteddisplay 10. For example, in some embodiments, as shown inFIG. 1 , the firstlight source module 100 and the secondlight source module 200 may be underlying thefirst eyepiece module 500 and thesecond eyepiece module 600, so as to minimize the he horizontal area of the head mounteddisplay 10. In some embodiments, the level height h1 where the firstlight source module 100 is located is substantially equal to the level height h2 where the secondlight source module 200 is located. In other words, the firstlight source module 100 and the secondlight source module 200 are located on the substantially equal level height, thereby benefiting to minimize a thickness of the head mounteddisplay 10. - More particularly, in some embodiments, as shown in
FIG. 1 , the firstlight source module 100 may include a solid-statelight source array 110. Similarly, the secondlight source module 200 may include a solid-statelight source array 210. The solid-statelight source arrays light source array 110 of the firstlight source module 100 is substantially a collimated light, that is, a divergence angle of the first light L1 is close to zero. Therefore, after theimage output module 400 receives the first light L1, theimage output module 400 may generate the substantially collimated first image light I1, so the first image light I1 may be precisely guided into the first target position P1 through thefirst eyepiece module 500 avoiding the first image light I1 shifting from the first target position P1 to the second target position P2. Similarly, the second light L2 emitted by the solid-statelight source array 210 of the secondlight source module 200 is substantially a collimated light, that is, a divergence angle of the second light L2 is close to zero. Therefore, after theimage output module 400 receives the second light L2, theimage output module 400 may generate the substantially collimated second image light I2, so the second image light I2 may be precisely guided into the second target position P2 through thesecond eyepiece module 600 avoiding the second image light I2 shifting from the second target position P2 to the first target position P1. Furthermore, in some embodiments, as shown inFIG. 1 , the firstlight source module 100 and the secondlight source module 200 may also include taperedrods ball lenses display 10. - In some embodiments, as shown in
FIG. 1 , the light reversely turning module has a first light-redirectingunit 310 and a second light-redirectingunit 320, the first light-redirectingunit 310 is configured to reflect and redirect the first light L1 from the firstlight source module 100 and the second light L2 from the secondlight source module 200 to the second light-redirectingunit 320, and the second light-redirectingunit 320 is configured to reflect and redirect the first light L1 and the second light L2 from the first light-redirectingunit 310 into theimage output module 400. More particularly, in some embodiments, as shown inFIG. 1 , the first light-redirectingunit 310 has areflective surface 312. A distance between thereflective surface 312 and the first light source module 100 (such as theball lens 130 of the first light source module 100) is increasing along a direction towards the second light-redirectingunit 320, thereby benefiting to reflect and redirect the first light L1 to the second light-redirectingunit 320. In other words, thereflective surface 312 has a normal vector N1 being towards the top left of the figure. Accordingly, when the first light L1 propagates along the first direction D1 and arrives at thereflective surface 312 of the first light-redirectingunit 310, the first light L1 may be reflected by thereflective surface 312 and propagate towards the second light-redirectingunit 320 along the third direction D3. Then, when the first light L1 propagates along the third direction D3 and goes into the second light-redirectingunit 320, the first light L1 can be reflected and redirected by a certain surface of the second light-redirectingunit 320 for propagating towards theimage output module 400 along the first direction D1, so the first light L1 can arrive at theimage output module 400. Similarly, a distance between thereflective surface 312 and the second light source module 200 (such as theball lens 230 of the second light source module 200) is increasing along a direction towards the second light-redirectingunit 320, thereby benefiting to reflect and redirect the second light L2 to the second light-redirectingunit 320. Accordingly, when the second light L2 propagates along the first direction D1 and arrives at thereflective surface 312 of the first light-redirectingunit 310, the second light L2 may be reflected by thereflective surface 312 and propagate towards the second light-redirectingunit 320 along the third direction D3. Then, when the second light L2 propagates along the third direction D3 and goes into the second light-redirectingunit 320, the second light L2 can be reflected and redirected by the certain surface of the second light-redirectingunit 320 for propagating towards theimage output module 400 along the first direction D1, so the second light L2 can arrive at theimage output module 400. - As a result, by the first light-redirecting
unit 310 and the second light-redirectingunit 320, the first light L1 from the firstlight source module 100 and the second light L2 from the secondlight source module 200 arriving at theimage output module 400 may be redirected at least two times, so theimage output module 400 can be disposed on the level height being different from the level height where the firstlight source module 100 and the secondlight source 200 are disposed (for example, theimage output module 400 is disposed on the top right inFIG. 1 ), thereby minimizing the horizontal area of the head mounteddisplay 10. In some embodiments, for example, the first light-redirectingunit 310 may be a reflected mirror, which may be, but is not limited to be, a reflected mirror with an aluminum coating, a reflected mirror with a metal coating, a reflected mirror with a high reflectivity material, so as to redirect the first light L1 and the second light L2 to the second light-redirectingunit 320 more effectively. -
FIG. 2 is an enlarged cross-section view of a local area R of theFIG. 1 . - In some embodiments, as shown in
FIG. 1 andFIG. 2 , the second light-redirectingunit 320 has a redirectingsurface 322, the redirectingsurface 322 is configured to reflect and redirect the first light L1 and the second light L2 from the first light-redirectingunit 310 to theimage output module 400, and the first image light I1 and the second image light I2 generated by theimage output module 400 may propagate into the redirectingsurface 322, and an incident angle of the first image light L1 and an incident angle of the second image light L2 at the redirectingsurface 322 is less than a critical angle of the redirecting surface. The critical angle is a least angle of incidence arriving at the redirectingsurface 322 of the second light-redirectingunit 320 above which the total internal reflection occurs. In other words, when the first light L1 arrives at the redirectingsurface 322 of the second light-redirectingunit 320, the first light L1 can be reflected and redirected to theimage output module 400. Then, theimage output module 400 receives the first light L1 and generates the first image light I1 with the image information, since the incident angle of the first image light I1 at the redirectingsurface 322 is design to being less than the critical angle, the first image light I1 may not be totally reflected, and the first image light I1 may penetrate the second light-redirectingunit 320, thereby benefiting to guide the first image light I1 into thebeam splitting mirror 700. Similarly, when the second light L2 arrives at the redirectingsurface 322 of the second light-redirectingunit 320, the second light L2 can be reflected and redirected to theimage output module 400. Then, theimage output module 400 receives the second light L2 and generates the second image light I2 with the image information, since the incident angle of the second image light I2 at the redirectingsurface 322 is design to being less than the critical angle, the second image light I2 may not be totally reflected, and the second image light I2 may penetrate the second light-redirectingunit 320, thereby benefiting to guide the second image light I2 into thebeam splitting mirror 700. As a result, by the second light-redirectingunit 320, the optical path of the lights from the first light-redirectingunit 310 may be controlled, and the optical path of the lights from theimage output module 400 may also be controlled. For example, in some embodiments, the second light-redirectingunit 320 may be, but is not limited to be, a totally internal reflection prism, so as to separate the first light L1 and the first image light I1 more effectively, and also to separate the second light L2 and the second image light I2 more effectively. For example, in some embodiments, by designs of the incident angles of the first light L1 and the second light L2 arriving at theimage output module 400, or designs of the emitting angles of the first image light I1 and the second image light I2 generated by theimage output module 400, so the incident angles of the first image light I1 and the second image light I2 at the redirectingsurface 322 is less than the critical angle of the redirectingsurface 322, but it is not limited. - In some embodiments, as shown in
FIG. 1 andFIG. 2 , the light reversely turningmodule 300 further includes a penetrateassist unit 330. The penetrateassist unit 330 is abutted against the redirectingsurface 322 of the second light-redirectingunit 320, and the penetrateassist unit 330 and the second light-redirectingunit 320 may have different refractive indexes to make the first light L1 and the second light L2 propagating at the redirectingsurface 322 reflected totally, and make at least one part of the first image light I1 and the second image light I2 penetrate the redirectingsurface 322. More particularly, in some embodiments, as shown inFIG. 2 , the penetrateassist unit 330 may include aconnect surface 332, theconnect surface 332 is connected to the redirectingsurface 322 of the second light-redirectingunit 320, and a refractive index n1 of the penetrateassist unit 330 is less than a refractive index n2 of the second light-redirectingunit 320. Accordingly, when the first light L1 (or the second light L2) from the first light-redirectingunit 310 is transmitted to the redirectingsurface 322 of the second light-redirectingunit 320, since the refractive index n1 of the penetrateassist unit 330 is less than the refractive index n2 of the second light-redirectingunit 320, and the incident angle of the first light L1 (or the second light I2) is designed to be larger than the critical angle(arcsin(n/n2)), the first light L1 (or the second light L2) may be totally reflected at the redirectingsurface 322. In other words, the first light L1 (or the second light L2) may not penetrate the second light-redirectingunit 320, that is, the first light L1 (or the second light I2) may be totally reflected to theimage output module 400. For example, in some embodiments, by designs of the position of the firstlight source module 100 relative to theimage output module 400, the position of the secondlight source module 200 relative to theimage output module 400, the position of the first light-redirectingunit 310 relative to theimage output module 400, an angle formed between the normal vector N1 of the first light-redirectingunit 310 and the first light L1 or the second light L2, or an arranged location of the second light-redirectingunit 320, so the incident angle of the first light L1 (or the second light L2) at the redirectingsurface 322 may be larger than the critical angle of the redirectingsurface 322. - In some embodiments, as shown in
FIG. 2 , the emitting angle of the first image light I1 is designed to make the incident angle of the first image light I1 arriving at the redirectingsurface 322 be less than the critical angle(arcsin(n1/n2)), so the first image light I1 may penetrate the redirectingsurface 322. Similarly, the emitting angle of the second image light I2 is designed to make the incident angle of the second image light I2 arriving at the redirectingsurface 322 be less than the critical angle(arcsin(n1/n2)), so the second image light I2 may penetrate the redirectingsurface 322. It is noted that, in some embodiments, the incident angle of the first light L1 arriving at theimage output module 400 can be different from the incident angle of the second light L2 arriving at theimage output module 400, so the emitting angle of the first image light I1 generated by theimage output module 400 can be different from the emitting angle of the second image light I2 generated by theimage output module 400, thereby benefiting to guide the first image light I1 into the first target position P1 and benefiting to guide the second image light I2 into the second target position P2. - For example, in some embodiments, another devices can be applied to separate the optical path of the first light L1 and the optical path of the first image light I1 generated by the
image output module 400, and to separate the optical path of the second light L2 and the optical path of the second image light I2 generated by theimage output module 400. For example, when theimage output module 400 includes a silicon-based liquid crystal cell, the first light L1 and the second light L2 may be converted into the first image light I1 and the second image light I2 with different polarization, and the second light-redirectingunit 320 may include a polarized beam splitter and a quarter-wave plate, so as to separate the optical paths of the first image light I1 and the second image light I2. - In some embodiments, the
image output module 400 is a digital micro-mirror device configured to reflect and make the first light L1 from the second light-redirectingunit 320 become the first image light I1 with the image information, and to reflect and make the second light L2 from the second light-redirectingunit 320 become the second image light I2 with the image information. More particularly, the digital micro-mirror device may include a plurality of micro reflected mirrors, so the reflected direction of the light received by each micro reflected mirror can be controlled. Each micro reflected mirror represents an image pixel, and each micro reflected mirror can be driven by a control device, so the micro reflected mirror can be rotated to a corresponding angle, thereby benefiting to reflect a light to a predetermined position. - For example, when the first light L1 is redirected to the digital micro-mirror device by the second light-redirecting
unit 320, some of the micro reflected mirrors can be rotated to a first group angle, so as to receive the first light L1 and to reflect the first light L1 to become the first image light I1 with the image information. Similarly, when the second light L2 is redirected to the digital micro-mirror device by the second light-redirectingunit 320, some of the micro reflected mirrors can be rotated to a second group angle, so as to receive the second light L2 and to reflect the second light L2 to become the second image light I2 with the image information. It is noted that the first group angle may be different from the second group angle, so the digital micro-mirror device may generate the different emitting angles for the first image light I1 and the second image light I2 in a reflecting manner. That is, the digital micro-mirror device may generate different optical paths of the first image light I1 and the second image light I2, which may benefit to precisely transmit the first image light I1 to thefirst eyepiece module 500 by thebeam splitting mirror 700, and benefit to precisely transmit the second image light I2 to thesecond eyepiece module 600 by thebeam splitting mirror 700. In other words, when theimage output module 400 is the digital micro-mirror device, it may separate the optical paths of the first image light I1 and the second image light I2 more effectively, avoiding the first image light I1 and the second image light I2 from interfering with each other and reflecting the first image light I1 and the second image light I2 to thefirst eyepiece module 500 and thesecond eyepiece module 600 more precisely. For example, in some embodiments, theimage output module 400 may be a tilt and roll pixel digital micro-mirror device, so as to separate the optical paths of the first image light I1 and the second image light I2 more effectively. - More particularly, in some embodiments, as shown in
FIG. 1 , the first light L1 emitted by the firstlight source module 100 propagate along the first direction D1, and the second light L2 emitted by the secondlight source module 200 propagate along the first direction D1. After the first light L1 and the second light L2 are redirected to theimage output module 400 by the light reversely turningmodule 300, theimage output module 400 reflects the first image light I1 and the second image light I2 with the corresponding image information. It is noted that theimage output module 400 is designed to reflect and generate the first image light I1 (or the second image light I2) propagating along the second direction D2, in which the first direction D1 is reverse to the second direction D2. In other words, a difference between the propagating direction of the first light L1 (or the second light L2) and the propagating direction of the first image light I1 (or the second image light I2) is 180 degrees. - Reference is made to
FIG. 3 , which is a top view of the head mounted display in accordance with some embodiments of the present disclosure. More particularly, in some embodiments, as shown inFIG. 3 , thebeam splitting mirror 700 may include a firstbeam splitting unit 710 and a secondbeam splitting unit 720, and the firstbeam splitting unit 710 is abutted against the secondbeam splitting unit 720. The firstbeam splitting unit 710 has a firstbeam splitting surface 712 and a firstrear surface 714 opposite to each other, and the secondbeam splitting unit 720 has a secondbeam splitting surface 722 and a secondrear surface 724 opposite to each other, and the firstrear surface 714 and the secondrear surface 724 are facing to each other and form an acute angle. The firstbeam splitting surface 712 is farther away from the first target position P1 than the firstrear surface 714 being, and the secondbeam splitting surface 722 is farther away from the second target position P2 than the secondrear surface 724 being. As shown inFIG. 3 , the firstbeam splitting surface 712 is located on the optical path of the first image light I1, so as to redirect the first image light I1 to thefirst eyepiece module 500. Similarly, the secondbeam splitting surface 722 is located on the optical path of the second image light I2, so as to redirect the second image light I2 to thesecond eyepiece module 600. As a result, the first image light I1 and the second image light I2 may be respectively redirected to thefirst eyepiece module 500 and thesecond eyepiece module 600 by thebeam splitting mirror 700. - In some embodiments, as shown in
FIG. 3 , the head mounteddisplay 10 may further include alens group 420, thelens group 420 is optically coupled between theimage output module 400 and thebeam splitting mirror 700, and thelens group 420 is configured to adjust qualities of images of the first image light I1 and the second image light I2. For example, a refractive power or another optical parameters of each lens of thelens group 420 may be designed to eliminate a distortion of the first image light I1 and the second image light I2 generated by theimage output module 400, which may assist to improve the quality of the first image light I1 imaging to the first target position P1 and to improve the quality of the second image light I2 imaging to the second target position P2. - In some embodiments, as shown in
FIG. 3 , thefirst eyepiece module 500 may include a partially lightreflective unit 510 and an image-reflectedmirror 520. The partially lightreflective unit 510 is optically coupled between the firstbeam splitting unit 710 of thebeam splitting mirror 700 and the image-reflectedmirror 520. For example, when the first image light I1 arrives at the firstbeam splitting surface 712 of the firstbeam splitting unit 710, the first image light I1 may be redirected and guided into the partially lightreflective unit 510 in a reflecting manner, and then the partially lightreflective unit 510 may redirect a part of the first image light I1 to the image-reflectedmirror 520 in a reflecting manner thereby forming a first intermediate image, and the first intermediate image is projected to the first target position P1 by afirst eyepiece 530. Similarly, in some embodiments, thesecond eyepiece module 600 may include a partially lightreflective unit 610 and an image-reflectedmirror 620. The partially lightreflective unit 610 is optically coupled between the secondbeam splitting unit 720 of thebeam splitting mirror 700 and the image-reflectedmirror 620. For example, when the second image light I2 arrives at the secondbeam splitting surface 722 of the secondbeam splitting unit 720, the second image light I2 may be redirected and guided into the partially lightreflective unit 610 in a reflecting manner, and then the partially lightreflective unit 610 may redirect a part of the second image light I2 to the image-reflectedmirror 620 in a reflecting manner thereby forming a second intermediate image, and the second intermediate image is projected to the second target position P2 by asecond eyepiece 630. For example, in some embodiments, the partially lightreflective units beam splitting mirror 700 to thefirst eyepiece 530, and redirect the second image light I2 from thebeam splitting mirror 700 to thesecond eyepiece 630. For example, when the first image light I1 and the second image light I2 are two different polarized lights, the partially lightreflective units - More particularly, in some embodiments, as shown in
FIG. 3 , the firstbeam splitting surface 712 and the secondbeam splitting surface 722 may intersect at a ridge R. There is animaginary plane 730 on which the ridge R lies and perpendicular to an arrange direction of theimage output module 400 and thebeam splitting mirror 700. Theimaginary plane 730 may include a firstimaginary plane 732 and a secondimaginary plane 734 that intersect at the ridge R. The firstimaginary plane 732 and the firstbeam splitting surface 712 respectively haveperipheries peripheries imaginary plane 730. Similarly, the secondimaginary plane 734 and the secondbeam splitting surface 722 respectively haveperipheries peripheries imaginary plane 730. The first image light I1 may be propagated to the firstbeam splitting surface 712 through a center of the firstimaginary plane 732. Similarly, the second image light I2 may be propagated to the secondbeam splitting surface 722 through a center of the secondimaginary plane 734. In other words, the first image lights I1 may converge at the center of the firstimaginary plane 732, and the second image lights I2 may converge at the center of the secondimaginary plane 734. - In some embodiments, the first
light source module 100 and the secondlight source module 200 emit lights in a time sequence. In other words, the firstlight source module 100 and the secondlight source module 200 alternately emit lights according to the time sequence. Reference is made toFIG. 4 , which is a schematic diagram showing an optical path of the head mounteddisplay 10 at a first time point in accordance with some embodiments of the present disclosure. For example, as shown inFIG. 1 andFIG. 4 , at a first time point, the firstlight source module 100 emits the first light L1, the first light L1 is redirected to theimage output module 400 by the light reversely turningmodule 300 for generating the first image light I1, and the first image light I1 is guided into the first target position P1 (such as a left eye of an observer) by thebeam splitting mirror 700 and thefirst eyepiece module 500. Reference is made toFIG. 5 , which is a schematic diagram showing an optical path of the head mounteddisplay 10 at a second time point in accordance with some embodiments of the present disclosure. For example, as shown inFIG. 1 andFIG. 5 , at a second time point, the secondlight source module 200 emits the second light L2, the second light L2 is redirected to theimage output module 400 by the light reversely turningmodule 300 for generating the second image light I2, and the second image light I2 is guided into the second target position P2 (such as a right eye of the observer) by thebeam splitting mirror 700 and thesecond eyepiece module 600. As a result, by fast switching the firstlight source module 100 and the secondlight source module 200 in the time sequence, the corresponding first image light I1 and the second image light I2 may be respectively imaged to the first target position P1 and the second target position P2 in the time sequence, so as to achieve a stereoscopic display of the head mounteddisplay 10. In other words, the head mounteddisplay 10 of the present disclosure uses a time-multiplex way to switch the firstlight source module 100 and the secondlight source module 200 in the time sequence, so the head mounteddisplay 10 can provide a stereoscopic image. - In some embodiments, the
image output module 400 provides a plurality of reflected patterns in the time sequence, and the firstlight source module 100 and the secondlight source module 200 switched substantially synchronizes with the reflected patterns switched. More particularly, in some embodiments, the reflected patterns can be classified as a first group of reflected patterns and a second group of reflected patterns, and the first group of reflected patterns and the second group of reflected patterns are switched in the time sequence, that is, theimage output module 400 alternately provides the first group of reflected patterns and the second group of reflected patterns according to the time sequence. For example, at the first time point, the first light source emits the first light L1 to theimage output module 400, and theimage output module 400 substantially provides the first group of reflected patterns in synchronization, so theimage output module 400 receives the first light L1 and generates the first image light I1 with the image information of the first group of reflected patterns. Then, at the second time point, the second light source emits the second light L2 to theimage output module 400, and theimage output module 400 substantially provides the second group of reflected patterns in synchronization, so theimage output module 400 receives the second light L2 and generates the second image light I2 with the image information of the second group of reflected patterns. In other words, at a first time t1, the firstlight source module 100 may be controlled to emit light, and the secondlight source module 200 may be controlled to not emit light, and theimage output module 400 may be controlled to provide the first group of reflected patterns. Then, at a second time t2, the firstlight source module 100 may be controlled to not emit light, and the secondlight source module 200 may be controlled to emit light, and theimage output module 400 may be controlled to provide the second group of reflected patterns. Accordingly, the first light L1 generated by the firstlight source module 100 substantially synchronizes with the first group of reflected patterns generated by theimage output module 400, so as to generate the first image light I1 with the corresponding correct image information, which may benefit to image the first image light I1 to the first target position P1. Similarly, the second light L2 generated by the secondlight source module 200 substantially synchronizes with the second group of reflected patterns generated by theimage output module 400, so as to generate the second image light I2 with the corresponding correct image information, which may benefit to image the second image light I2 to the second target position P1. - In accordance with some embodiments of the present disclosure, since the first
light source module 100 and the secondlight source module 200 switch in a time sequence and the configuration of thebeam splitting mirror 700, the head mounteddisplay 10 may respectively provide the first image light I1 and the second image light I2 to a left eye and a right eye of an observer in the time sequence, so as to generate a stereoscopic image. Furthermore, the light reversely turningmodule 300 may make the propagating direction of the first light L1 in reverse to the propagating direction of the first image light I1, so the firstlight source module 100 and theimage output module 400 may be located on different level heights. Similarly, the light reversely turningmodule 300 may make the propagating direction of the second light L2 in reverse to the propagating direction of the second image light I2, so the secondlight source module 200 and theimage output module 400 may be located on different level heights. Therefore, the horizontal area of the head mounteddisplay 10 may be reduced, benefiting to minimize the size of the head mounteddisplay 10. - Although the present invention has been described in considerable detail with reference to certain embodiments thereof, other embodiments are possible. Therefore, the spirit and scope of the appended claims should not be limited to the description of the embodiments contained herein.
- It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims.
Claims (15)
1. A head mounted display, comprising:
a first light source module configured to emit a first light;
a second light source module configured to emit a second light;
an image output module configured to receive the first light and the second light, and to respectively generate a first image light and a second image light with corresponding image information;
a light reversely turning module optically coupled between the first light source module and the image output module, and optically coupled between the second light source module and the image output module, making a propagating direction of the first light in reverse to a propagating direction of the first image light, and making a propagating direction of the second light reverse to a propagating direction of the second image light;
a first eyepiece module configured to make the first image light image to a first target position;
a second eyepiece module configured to make the second image light image to a second target position; and
a beam splitting mirror optically coupled between the image output module and the first eyepiece module, and optically coupled between the image output module and the second eyepiece module, and configured to respectively guide the first image light into the first eyepiece module and guide the second image light into the second eyepiece module.
2. The head mounted display of claim 1 , wherein the light reversely turning module has a first light-redirecting unit and a second light-redirecting unit, the first light-redirecting unit is configured to reflect and redirect the first light from the first light source module and the second light from the second light source module to the second light-redirecting unit, and the second light-redirecting unit is configured to reflect and redirect the first light and the second light from the first light-redirecting unit to the image output module.
3. The head mounted display of claim 2 , wherein the first light-redirecting unit has a reflective surface, and a distance between the reflective surface and the first light source module is increasing along a direction towards the second light-redirecting unit, and a distance between the reflective surface and the second light source module is increasing along the direction towards the second light-redirecting unit.
4. The head mounted display of claim 2 , wherein the second light-redirecting unit has a redirecting surface, the redirecting surface is configured to reflect and redirect the first light and the second light from the first light-redirecting unit to the image output module, and then the first image light and the second image light generated by the image output module propagate into the redirecting surface, and an incident angle of the first image light and an incident angle of the second image light at the redirecting surface is less than a critical angle of the first image light and a critical angle of the second image light at the redirecting surface.
5. The head mounted display of claim 4 , further comprises a penetrate assist unit abutted against the redirecting surface of the second light-redirecting unit, the penetrate assist unit and the second light-redirecting unit have different refractive indexes to make the first light and the second light propagating at the redirecting surface be reflected totally, and make at least one part of the first image light and the second image light penetrate the redirecting surface.
6. The head mounted display of claim 2 , wherein the image output module is a digital micro-mirror device configured to reflect and make the first light from the second light-redirecting unit become the first image light, and to reflect and make the second light from the second light-redirecting unit become the second image light.
7. The head mounted display of claim 2 , wherein a level height where the first light-redirecting unit is located is different from a level height where the second light-redirecting unit is located.
8. The head mounted display of claim 1 , wherein the first light emitted by the first light source module and the second light emitted by the second light source module propagates along a first direction, and the first image light and the second image light emitted by the image output module propagates along a second direction, and the first direction is different from the second direction.
9. The head mounted display of claim 1 , wherein a level height where the first light source module is located is different from a level height where the image output module is located.
10. The head mounted display of claim 9 , wherein a level height where the second light source module is located is substantially equal to the level height where the first light source module is located.
11. The head mounted display of claim 1 , wherein at least one of the first eyepiece module and the second eyepiece module has a partially light reflective unit and an image-reflected mirror, and the partially light reflective unit is configured to redirect the first image light or the second image light from the beam splitting mirror to the image-reflected mirror, and the image-reflected mirror is configured to make the first image light or the second image light from the partially light reflective unit to image to the first target position and the second target position.
12. The head mounted display of claim 1 , wherein the first light source module and the second light source module emit lights in a time sequence.
13. The head mounted display of claim 12 , wherein the image output module provides a plurality of reflected patterns in the time sequence.
14. The head mounted display of claim 13 , wherein the first light source module and the second light source module switched substantially synchronizes with the reflected patterns switched.
15. The head mounted display of claim 1 , further comprising:
a lens group optically coupled between the image output module and the beam splitting mirror, and the lens group is configured to adjust qualities of images of the first image light and the second image light.
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TW105116194A TWI588538B (en) | 2016-05-25 | 2016-05-25 | Head mounted display |
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TW105116194A | 2016-05-25 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220299786A1 (en) * | 2019-09-04 | 2022-09-22 | Google Llc | Polarization-dependent augmented reality display |
US20230266585A1 (en) * | 2022-02-24 | 2023-08-24 | Hewlett-Packard Development Company, L.P. | Head-mounted devices with movable optical elements |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI614524B (en) * | 2016-12-06 | 2018-02-11 | 台達電子工業股份有限公司 | Head mounted display |
TWI619996B (en) * | 2017-01-19 | 2018-04-01 | 台達電子工業股份有限公司 | Near-Eye Display Device |
EP3686483A1 (en) * | 2019-01-23 | 2020-07-29 | ZKW Group GmbH | Lighting device for a motor vehicle headlight |
CN111487776A (en) * | 2020-05-20 | 2020-08-04 | 宁波鸿蚁光电科技有限公司 | Binocular optical display system with multiplexing light sources and wearable equipment |
Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4805988A (en) * | 1987-07-24 | 1989-02-21 | Nelson Dones | Personal video viewing device |
US5035474A (en) * | 1984-04-16 | 1991-07-30 | Hughes Aircraft Company | Biocular holographic helmet mounted display |
US5371556A (en) * | 1990-01-19 | 1994-12-06 | Sony Corporation | Spectacle type retina direct display apparatus |
US5418584A (en) * | 1992-12-31 | 1995-05-23 | Honeywell Inc. | Retroreflective array virtual image projection screen |
US5467205A (en) * | 1993-04-28 | 1995-11-14 | Olympus Optical Co., Ltd. | Image display system with right and left eye illuminating means |
US5486841A (en) * | 1992-06-17 | 1996-01-23 | Sony Corporation | Glasses type display apparatus |
US5661603A (en) * | 1994-09-05 | 1997-08-26 | Olympus Optical Co., Ltd. | Image display apparatus including a first and second prism array |
US5682173A (en) * | 1993-07-27 | 1997-10-28 | Holakovszky; Laszlo | Image Display device |
US5712649A (en) * | 1991-11-01 | 1998-01-27 | Sega Enterprises | Head-mounted image display |
US5739955A (en) * | 1994-08-10 | 1998-04-14 | Virtuality (Ip) Limited | Head mounted display optics |
US5903395A (en) * | 1994-08-31 | 1999-05-11 | I-O Display Systems Llc | Personal visual display system |
US6094309A (en) * | 1998-01-28 | 2000-07-25 | U.S. Philips Corporation | Head-mounted display |
US6246383B1 (en) * | 1998-01-28 | 2001-06-12 | U.S. Philips Corporation | Head-mounted display |
US20040150884A1 (en) * | 2002-11-19 | 2004-08-05 | Push Technologies, Inc. | Optical arrangements for head mounted displays |
US7177080B2 (en) * | 2002-03-07 | 2007-02-13 | Flir Systems Ab | Method and a device for bi-monocular image transfer |
US20090153437A1 (en) * | 2006-03-08 | 2009-06-18 | Lumus Ltd. | Device and method for alignment of binocular personal display |
US20100097671A1 (en) * | 2006-12-12 | 2010-04-22 | See Real Technologies S.A. | Head-Mounted Display Device for Generating Reconstructions of Three-Dimensional Representations |
US20110292513A1 (en) * | 2010-05-25 | 2011-12-01 | Seiko Epson Corporation | Head mounted display |
US9019172B2 (en) * | 2008-10-31 | 2015-04-28 | Canon Kabushiki Kaisha | Image display apparatus |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6271808B1 (en) | 1998-06-05 | 2001-08-07 | Silicon Light Machines | Stereo head mounted display using a single display device |
US6972735B2 (en) | 2002-03-20 | 2005-12-06 | Raymond T. Hebert | Head-mounted viewing system for single electronic displays using biocular lens with binocular folding mirrors |
EP2174513B1 (en) | 2007-07-26 | 2014-05-21 | RealD Inc. | Head-mounted single panel stereoscopic display |
CN101285936A (en) | 2008-05-29 | 2008-10-15 | 四川虹视显示技术有限公司 | Binocular near-eye display system |
CN102402018B (en) * | 2010-09-07 | 2013-11-06 | 台达电子工业股份有限公司 | Polarization conversion system and stereoscopic projection system employing same |
TWI452341B (en) | 2011-12-09 | 2014-09-11 | Delta Electronics Inc | Stereoscopic display apparatus |
TWI518368B (en) * | 2013-09-11 | 2016-01-21 | 財團法人工業技術研究院 | Virtual image display apparatus |
-
2016
- 2016-05-25 TW TW105116194A patent/TWI588538B/en active
- 2016-08-10 US US15/232,818 patent/US9829716B1/en active Active
Patent Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5035474A (en) * | 1984-04-16 | 1991-07-30 | Hughes Aircraft Company | Biocular holographic helmet mounted display |
US4805988A (en) * | 1987-07-24 | 1989-02-21 | Nelson Dones | Personal video viewing device |
US5371556A (en) * | 1990-01-19 | 1994-12-06 | Sony Corporation | Spectacle type retina direct display apparatus |
US5712649A (en) * | 1991-11-01 | 1998-01-27 | Sega Enterprises | Head-mounted image display |
US5486841A (en) * | 1992-06-17 | 1996-01-23 | Sony Corporation | Glasses type display apparatus |
US5418584A (en) * | 1992-12-31 | 1995-05-23 | Honeywell Inc. | Retroreflective array virtual image projection screen |
US5467205A (en) * | 1993-04-28 | 1995-11-14 | Olympus Optical Co., Ltd. | Image display system with right and left eye illuminating means |
US5682173A (en) * | 1993-07-27 | 1997-10-28 | Holakovszky; Laszlo | Image Display device |
US5739955A (en) * | 1994-08-10 | 1998-04-14 | Virtuality (Ip) Limited | Head mounted display optics |
US5903395A (en) * | 1994-08-31 | 1999-05-11 | I-O Display Systems Llc | Personal visual display system |
US5661603A (en) * | 1994-09-05 | 1997-08-26 | Olympus Optical Co., Ltd. | Image display apparatus including a first and second prism array |
US6094309A (en) * | 1998-01-28 | 2000-07-25 | U.S. Philips Corporation | Head-mounted display |
US6246383B1 (en) * | 1998-01-28 | 2001-06-12 | U.S. Philips Corporation | Head-mounted display |
US7177080B2 (en) * | 2002-03-07 | 2007-02-13 | Flir Systems Ab | Method and a device for bi-monocular image transfer |
US20040150884A1 (en) * | 2002-11-19 | 2004-08-05 | Push Technologies, Inc. | Optical arrangements for head mounted displays |
US20090153437A1 (en) * | 2006-03-08 | 2009-06-18 | Lumus Ltd. | Device and method for alignment of binocular personal display |
US20100097671A1 (en) * | 2006-12-12 | 2010-04-22 | See Real Technologies S.A. | Head-Mounted Display Device for Generating Reconstructions of Three-Dimensional Representations |
US9019172B2 (en) * | 2008-10-31 | 2015-04-28 | Canon Kabushiki Kaisha | Image display apparatus |
US20110292513A1 (en) * | 2010-05-25 | 2011-12-01 | Seiko Epson Corporation | Head mounted display |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220299786A1 (en) * | 2019-09-04 | 2022-09-22 | Google Llc | Polarization-dependent augmented reality display |
US20230266585A1 (en) * | 2022-02-24 | 2023-08-24 | Hewlett-Packard Development Company, L.P. | Head-mounted devices with movable optical elements |
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US9829716B1 (en) | 2017-11-28 |
TW201741725A (en) | 2017-12-01 |
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