CN106896500B - display device - Google Patents

Abstract

A display device includes a left eye block and a right eye block. The left eye block and the right eye block each include a micro-reflection unit, a relay unit and an eyepiece unit. The micro-reflection unit includes a plurality of micro-reflection lenses, and the micro-reflection unit is used to control the deflection angle of the micro-reflection lenses according to an electrical signal to convert a light source into an input image. The relay unit includes at least one first optical lens, and the relay unit is used to receive a light beam of an input image, and to magnify the input image through the first optical lens to generate a relay image. The eyepiece unit includes at least one second optical lens, and the eyepiece unit is used to receive a light beam of a relay image, and to converge the light beam of the relay image through the second optical lens to generate an output image for a user to watch.

Description

display device

technical field

The present invention relates to a display device, in particular to a display device using a micro-reflecting lens.

Background technique

Head mounted display (HMD) is an optical product for stereo vision display. It uses the stereo effect signal of binocular parallax to pass through the display and then through the optical components to the eyes respectively to generate a stereo image. The head-mounted display worn on the user's head uses a small screen for each eye, so it can produce a three-dimensional effect of a large image.

Head-mounted displays are commonly used in augmented reality (AR) or virtual reality (VR) systems, which move with the user and act as an input device to receive user responses . Through the head-mounted display worn on the user's head, images and text can be added to the screen generated by the user's observation of the surrounding environment to achieve the effect of virtual reality or augmented reality.

However, the current head-mounted display is not only too bulky, but also consumes too much energy because its optical components use a beamsplitter. Therefore, how to reduce the size of the head-mounted display and use energy effectively has become an important issue. .

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a display device using a micro-reflecting lens, aiming at the above-mentioned defects of the prior art.

In order to achieve the above objects, the present invention provides a display device. The display device includes a left-eye block and a right-eye block. The left-eye block and the right-eye block each include a micro-reflection unit, a micro-reflection unit, a relay unit, and an eyepiece unit. The micro-reflection unit includes a plurality of micro-reflection lenses, and the micro-reflection unit is used to control the deflection angle of the micro-reflection lenses according to the electrical signal to convert the light source into an input image. The relay unit includes at least one first optical lens, and the relay unit is used for receiving the light beam of the input image and amplifying the input image through the first optical lens to generate the relay image. The eyepiece unit includes at least one second optical lens, and the eyepiece unit is used for receiving the light beam of the relay image, and converging the light beam of the relay image through the second optical lens to generate an output image for the user to watch.

The technical effect of the present invention is:

In the display device of the present invention, the output image generated by the relay unit and the optical lens in the eyepiece unit does not cause energy loss due to the splitting of the light beam, and the configuration of the optical lens further reduces the size of the display device and reduces the image of the output image. bad phenomenon.

The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

Description of drawings

FIG. 1 is a schematic diagram of a display device according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a left eye block of the display device in FIG. 1 .

where the reference number

100 Display Units

100L left eye block

100R Right Eye Block

110 Micro Reflector Unit

112 total reflection prism

120 relay unit

130 Eyepiece Unit

E light source

Iin input image

Imid relay image

Iout The opening of the output image (Aperture)

U1 user

P1 first positive lens group

N1 first negative lens group

N2 second negative lens group

S1 first reflector

S2 second mirror

A1 first convex lens

A2 second convex lens

A3 third convex lens

A4 fourth convex lens

A5 fifth convex lens

A6 sixth convex lens

A7 seventh convex lens

B1 first concave lens

B2 second concave lens

Detailed ways

Below in conjunction with accompanying drawing, structure principle and working principle of the present invention are described in detail:

A number of different embodiments or illustrations are provided below for implementing various features of the invention. The elements and configurations of the specific examples are used in the following discussion to simplify the invention. Any examples discussed are for illustrative purposes only and do not in any way limit the scope and meaning of the invention or its examples. Furthermore, the present disclosure may repeat references to numerals and/or letters in different instances, such repetitions are for simplicity and clarification, and do not themselves specify the relationship between the different embodiments and/or configurations discussed below.

The terms used throughout the specification and the scope of the patent application, unless otherwise specified, usually have the ordinary meaning of each term used in the field, in the content of this invention and in the special content. Certain terms used to describe the invention are discussed below or elsewhere in this specification to provide those skilled in the art with additional guidance in the description of the invention.

As used herein, "coupled" or "connected" may refer to two or more elements in direct physical or electrical contact with each other, or in indirect physical or electrical contact with each other, while "coupled" or " "Connected" can also refer to the mutual operation or action of two or more elements. It will be understood that the terms first, second, and third, etc., are used herein to describe various elements, components, regions, layers and/or blocks. However, these elements, components, regions, layers and/or blocks should not be limited by these terms. These terms are only used to identify a single element, component, region, layer and/or block. Thus, a first element, component, region, layer and/or block hereinafter could also be termed a second element, component, region, layer and/or block without departing from the scope of the present invention. As used herein, the word "and/or" includes any combination of one or more of the associated listed items.

Please refer to FIG. 1 , which is a schematic diagram of a display device 100 according to an embodiment of the present disclosure. The display device 100 may be a head-mounted display or any display device applied to augmented reality (AR) or virtual reality (virtual reality, VR). For the convenience of description, the head-mounted display will be used as the following. For example, however, the present invention is not limited to this in practical application. As shown in FIG. 1 , the display device 100 includes a left-eye block 100L and a right-eye block 100R. The left-eye block 100L and the right-eye block 100R each include a micro-reflection unit 110 , a relay unit 120 and an eyepiece unit 130 .

The micro-reflection unit 110 includes a plurality of micro-reflection lenses (not shown). The micro-reflection unit 110 is used to control the deflection angle of the micro-reflection lenses according to an electrical signal to convert the light source E into the input image Iin. The micro-reflection unit 110 may be a digital micro-mirror device (DMD) or any other display that converts a light source into an input image, and the invention is not limited thereto. Further, please refer to FIG. 2 , which is a schematic diagram of the left-eye block 100L of the display device 100 in FIG. 1 . For the convenience of description, the left-eye block 100L of the display device 100 is used as an example. In fact, the operation of the right-eye block 100R of the display device 100 is similar to that of the left-eye block 100L of the display device 100 .

As shown in FIG. 2 , in some embodiments, the display device 100 further includes a total reflection prism 112 disposed between the micro-reflection unit 110 and the relay unit 120 for guiding the light beam of the light source E to the micro-reflection unit 110 . The reflection unit 110 includes micro-mirror mirrors, and each micro-mirror mirror can adjust the amount of reflected light through different deflection angles. Therefore, the micro-reflection unit 110 can control the deflection angle of the micro-reflection lens according to different electrical signals to convert the light source E into the input image Iin.

The relay unit 120 includes at least one first optical lens, and the relay unit 120 is used for receiving the light beam of the input image Iin and amplifying the input image Iin through the first optical lens to generate the relay image Imid.

As shown in FIG. 2, the above-mentioned at least one first optical lens includes a first positive lens group P1, a first reflecting mirror S1, a first negative lens group N1 and a second reflecting mirror S2, wherein the light beam of the input image Iin passes through the first positive lens group The lens group N1 transmits to the first reflecting mirror S1, then reflects to the first negative lens group N1 through the first reflecting mirror S1, transmits to the second reflecting mirror S2 through the first negative lens group N1, and then passes through the second reflecting mirror S2 Reflected to form a relay image Imid.

In this embodiment, the first positive lens group N1 includes a first convex lens A1 and a second convex lens A2, wherein the light beam of the input image Iin is transmitted through the first convex lens A1 to the second convex lens A2, and then transmitted to the second convex lens A2 through the second convex lens A2. A mirror S1. In this embodiment, the first negative lens group N1 includes a third convex lens A3 and a first concave lens B1, wherein the light beam of the input image Iin is reflected to the third convex lens A3 through the first reflecting mirror S1, and then transmitted to the third convex lens A3 through the third convex lens A3. The first concave lens B1 is then transmitted to the second reflecting mirror S2 through the first concave lens B1. It should be added that the third convex lens A3 in the first negative lens group N1 can be crown glass or other optical glass with low refractive index and high Abbe number. , the first concave lens B1 can be flint glass, or other optical glass with high refractive index and low Abbe number.

In addition, in the present invention, the above-mentioned and subsequent positive lens groups are any lenses that can condense light beams, and the negative lens groups are any lenses that can diverge light beams, which are not limited to the above embodiments. And here the relay image Imid is the spot-converged image of the enlarged input image Iin. Specifically, after the input image Iin is refracted and enlarged into the relay image Imid through the above-mentioned at least one first optical lens, the center image Imid is then converted into the intermediate image by the eyepiece unit 130. Each point of the subsequent image Imid is converted into parallel light beams in various directions, and converges at the pupil of the user U1 (that is, forming the output image and entering the opening Iout of the output image). In this embodiment, the first reflecting mirror S1 and the second reflecting mirror S2 are arranged so that the optical axis of the first positive lens group P1 is parallel to the optical axis of the at least one second optical lens. As shown in FIG. 2 , the first reflecting mirror S1 and the second reflecting mirror S2 are arranged so that the optical axis of the first positive lens group P1 is perpendicular to the optical axis of the first negative lens group N1, and the optical axis of the first negative lens group N1 It is perpendicular to the optical axis of at least one second optical lens. For example, for example, the optical axis of the first mirror S1 and the first positive lens group P1 may be arranged at an angle of 45 degrees, and the first mirror S1 and the second mirror S1 may be arranged to be perpendicular to each other. Or in other examples, for example, the optical axis of the first reflector S1 and the first positive lens group P1 can be set at an angle of 30 degrees, and the first reflector S1 and the second reflector S1 are also set to be perpendicular to each other so that the first positive lens The optical axis of the lens group P1 is parallel to the optical axis of the at least one second optical lens. Thereby, through the arrangement of the two reflecting mirrors (the first reflecting mirror S1 and the second reflecting mirror S2), the optical axis of the first positive lens group P1 is parallel to the optical axis of the at least one second optical lens, which can properly The volume of the display device 100 is greatly reduced by utilizing the space.

Next, since the enlarged relay image Imid has non-ideal aberration phenomenon (optical aberration), the aberration must be further eliminated through the eyepiece unit 130 . Please continue to refer to FIG. 2 , the eyepiece unit 130 includes at least one second optical lens. The eyepiece unit 130 is used for receiving the light beam of the relay image Imid, and condensing the light beam of the relay image Imid through the second optical lens to generate an output image , enter the opening Iout of the output image for the user U1 to watch.

Further, in this embodiment, the at least one second optical lens includes a fourth convex lens A4, a second negative lens group N2, a fifth convex lens A5 and a sixth convex lens A6, wherein the light beam of the relay image Imid passes through the fourth The convex lens A4 transmits to the second negative lens group N2, and then transmits to the fifth convex lens A5 through the second negative lens group N2, and then transmits to the sixth convex lens A6 through the fifth convex lens A5, and then transmits through the sixth convex lens A6 to form an output image , enter the opening Iout of the output image. In this embodiment, the second negative lens group N2 includes a second concave lens B2 and a seventh convex lens A7, wherein the light beam of the relay image Imid is transmitted through the fourth convex lens A4 to the second concave lens B2, and then transmitted to the second concave lens B2 through the second concave lens B2. The seventh convex lens A7 transmits to the fifth convex lens A5 through the seventh convex lens A7. Similarly, the seventh convex lens A7 in the second negative lens group N2 can be crown glass, or other optical glass with low refractive index and high Abbe number, The second concave lens B2 may be flint glass, or other optical glass with high refractive index and low Abbe number. Thereby, the aberration phenomenon in the output image is reduced through the arrangement of the at least one second optical lens.

Besides, the curvature design of each optical lens in the at least one second optical lens will further affect the aberration phenomenon in the output image. The ideal setting is shown in Figure 2. The fourth convex lens A4 has a first surface that is convex, flat or concave, and a second surface that is convex. That is, the radius of curvature of the first surface of the fourth convex lens A4 should be smaller than its second surface. the radius of curvature. The light beam of the relay image Imid is transmitted through the first surface of the fourth convex lens A4 to the second surface of the fourth convex lens A4, and then transmitted to the second negative lens group N2 through the second surface of the fourth convex lens A4.

The second concave lens B2 has a first surface that is convex or flat, and the second surface is concave. The seventh convex lens A7 has a first surface that is convex, and the second surface is convex, plane or concave, that is, the first surface of the second concave lens B2 The curvature radius of A7 should be smaller than the curvature radius of the second surface, and the curvature radius of the first surface of the seventh convex lens A7 should be larger than the curvature radius of the second surface. The light beam of the relay image Imid is transmitted to the first surface of the second concave lens B2 through the fourth convex lens A4, and then transmitted to the second surface of the second concave lens B2 through the first surface of the second concave lens B2, and then passes through the second concave lens B2. The second surface transmits to the first surface of the seventh convex lens A7, then transmits to the second surface of the seventh convex lens A7 through the first surface of the seventh convex lens A7, and then transmits to the fifth convex lens through the second surface of the seventh convex lens A7 A5.

The fifth convex lens A5 has a convex first surface and a convex, flat or concave second surface, that is, the curvature radius of the first surface of the fifth convex lens A5 should be greater than the curvature radius of the second surface. The light beam of the relay image Imid is transmitted to the first surface of the fifth convex lens A5 through the second negative lens group N2, and then transmitted to the second surface of the fifth convex lens A5 through the first surface of the fifth convex lens A5, and then passes through the fifth convex lens The second surface of A5 is transmitted to the sixth convex lens A6.

The sixth convex lens A6 has a convex first surface and a convex, flat or concave second surface, that is, the curvature radius of the first surface of the sixth convex lens A6 should be greater than the curvature radius of the second surface. The light beam of the relay image Imid is transmitted to the first surface of the sixth convex lens A6 through the sixth convex lens A6, and then transmitted to the second surface of the sixth convex lens A6 through the first surface of the sixth convex lens A6, and then passes through the sixth convex lens A6. The second surface transmits to form an output image and enters the opening Iout of the output image. Thereby, the aberration phenomenon in the output image Iout can be further reduced through the settings in the above embodiments.

To sum up, the output image generated by the display device in the present invention through the relay unit and the optical lens in the eyepiece unit does not cause energy loss due to light beam splitting, and the configuration of the optical lens further reduces the size of the display device And reduce the aberration phenomenon of the output image.

Of course, the present invention can also have other various embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding Changes and deformations should belong to the protection scope of the appended claims of the present invention.

Claims (7)

1. A display device, comprising:

a left-eye block and a right-eye block each comprising:

the micro reflection unit comprises a plurality of micro reflection lenses and is used for controlling the deflection angles of the micro reflection lenses according to the electric signals so as to convert a light source into an input image;

a relay unit including at least one first optical lens, the relay unit being configured to receive the light beam of the input image and to generate a relay image by magnifying the input image through the at least one first optical lens; and

the eyepiece unit comprises at least one second optical lens, and is used for receiving the light beam of the relay image and converging the light beam of the relay image through the at least one second optical lens to generate an output image for a user to watch;

wherein the at least one first optical lens comprises a first positive lens set, a first reflector, a first negative lens set and a second reflector, wherein the light beam of the input image is transmitted to the first reflector through the first positive lens set, then reflected to the first negative lens set through the first reflector, then transmitted to the second reflector through the first negative lens set, and then reflected by the second reflector to form the relay image;

the first positive lens group comprises a first convex lens and a second convex lens, wherein the light beam of the input image is transmitted to the second convex lens through the first convex lens and then transmitted to the first reflector through the second convex lens;

the first negative lens group comprises a third convex lens and a first concave lens, wherein the light beam of the input image is reflected to the third convex lens through the first reflector, then is transmitted to the first concave lens through the third convex lens, and then is transmitted to the second reflector through the first concave lens;

the relay image is a light spot convergent image of the amplified input image, the input image is refracted and amplified into the relay image through at least one first optical lens, each point of the relay image is converted into parallel light beams in each direction through the ocular lens unit, and the output image is formed and enters the opening of the output image; the first reflector and the second reflector are arranged to enable the optical axis of the first positive lens group to be parallel to the optical axis of at least one second optical lens;

the at least one second optical lens includes a fourth convex lens, a second negative lens group, a fifth convex lens and a sixth convex lens, wherein the light beam of the relay image is transmitted to the second negative lens group through the fourth convex lens, then transmitted to the fifth convex lens through the second negative lens group, then transmitted to the sixth convex lens through the fifth convex lens, and then transmitted through the sixth convex lens to form the output image.

2. The display apparatus according to claim 1, wherein the first reflector and the second reflector are disposed such that an optical axis of the first positive lens group is perpendicular to an optical axis of the first negative lens group, and an optical axis of the first negative lens group is perpendicular to an optical axis of the at least one second optical lens.

3. The display apparatus according to claim 1, wherein the fourth convex lens has a first surface being convex, flat or concave, and a second surface being convex, wherein the light beam of the relayed image is transmitted through the first surface of the fourth convex lens to the second surface of the fourth convex lens, and then through the second surface of the fourth convex lens to the second negative lens group.

4. The display apparatus according to claim 1, wherein the fifth convex lens has a first surface being convex and a second surface being convex, flat or concave, and wherein the light beam of the relayed image is transmitted through the second negative lens group to the first surface of the fifth convex lens, then through the first surface of the fifth convex lens to the second surface of the fifth convex lens, and then through the second surface of the fifth convex lens to the sixth convex lens.

5. The display device of claim 1, wherein the sixth convex lens has a first surface being convex and a second surface being convex, flat or concave, and wherein the light beam of the relayed image is transmitted through the fifth convex lens to the first surface of the sixth convex lens, then through the first surface of the sixth convex lens to the second surface of the sixth convex lens, and then through the second surface of the sixth convex lens to form the output image.

6. The display apparatus of claim 1, wherein the second negative lens group comprises a second concave lens and a seventh convex lens, wherein the light beam of the relayed image is transmitted to the second concave lens through the fourth convex lens, then to the seventh convex lens through the second concave lens, and then to the fifth convex lens through the seventh convex lens.

7. The display device according to claim 6, wherein the second concave lens has a first surface being convex or flat, a second surface being concave, the seventh convex lens has a first surface being convex and a second surface being convex, flat or concave, wherein the light beam of the relayed image is transmitted through the fourth convex lens to the first surface of the second concave lens, then through the first surface of the second concave lens to the second surface of the second concave lens, then through the second surface of the second concave lens to the first surface of the seventh convex lens, then through the first surface of the seventh convex lens to the second surface of the seventh convex lens, and then through the second surface of the seventh convex lens to the fifth convex lens.

Images