CN214202042U - High light efficiency does not have colored ribbon device of polarizing - Google Patents

Abstract

The utility model discloses a high light efficiency does not have colored ribbon polarization device for carry out the stereoscopic projection to incident broadcast picture light beam, including prism structure main part, prism structure main part is including being used for playing the first beam splitting rete that the picture light beam is decomposed into first polarization and second polarization with the incident, second beam splitting rete and being used for receiving the incident window that plays the picture light beam, first beam splitting rete and second beam splitting rete are at the inside handing-over of prism structure main part, first beam splitting rete includes first income beam splitting portion and second beam splitting portion, second beam splitting rete includes third beam splitting portion and fourth beam splitting portion, incident window is enclosed to close by second beam splitting portion and fourth beam splitting portion and forms. Implement the utility model discloses, solved among the prior art problem that the light path structure can't effectively focus to nearer projection screen, avoided the colored ribbon problem that appears in the middle of the projection screen among the prior art simultaneously.

Description

High light efficiency does not have colored ribbon device of polarizing

Technical Field

The utility model relates to a stereographic projection technical field, in particular to high light efficiency that low cost, can closely focus does not have colored ribbon device that polarizes.

Background

Light emitted by a light source of an existing projector is natural light, polarization is not displayed, and stereoscopic display needs to be realized by polarizing the light into linearly polarized light, modulating the linearly polarized light by using a Liquid Crystal Variable Retarder (LCVR), and enabling left and right eye images to enter left and right eyes in a time-sharing manner so as to achieve the effect of stereoscopic display. Because the traditional method for generating light in a linear polarization state is to add a dichroic polarizer directly in front of a projection objective, the dichroic polarizer can absorb electric vector light parallel to an absorption axis, namely more than 55% of light energy is absorbed by the polarizer, and the display brightness of the screen is greatly reduced.

More than 55% of the emitted light energy can be continuously absorbed by the polaroid, which can cause the temperature of the polaroid to rise, and the performances such as the polarization degree of the polaroid can be reduced, even the polaroid can be damaged. In addition, the polarizer is attached to the surface of the liquid crystal variable phase retarder, which causes liquid crystal molecules in the liquid crystal cell to absorb most of the heat, and the liquid crystal molecules are very temperature sensitive substances, which affects the birefringence coefficient thereof, causes the optical path difference of the polarized o and e lights to change or even fail, and further affects the three-dimensional picture effect of the screen display.

Compared with the polarization beam splitter in the prior art, the polarization beam splitter has the advantages that the transmission light beam and the reflection light beam can have the same polarization state after leaving the polarization beam splitter, and the transmittance and the reflectivity in a visible wave band are far higher than those of the common polarization beam splitter.

The existing polarization light splitting structure comprises 1 obtuse-angle triangular prism with an obtuse angle of 156 +/-2 degrees, 1 isosceles right-angle prism, 2 identical acute-angle triangular prisms, an upper reflector and a lower reflector, and the lens assembly consisting of a half-concave lens 31 and a convex lens 32 is adopted in the lens structure.

However, the whole volume of the light splitting structure is too large, so that the production and installation cost is too high, the small throw ratio plate price is too high, the volume is too large, the practical value is low, the deflection angle is too large when a film layer is irradiated, the light splitting efficiency is reduced, and the lighting effect is influenced.

SUMMERY OF THE UTILITY MODEL

The focusing lens group is adjusted according to the actual screen distance, and focusing is difficult to complete for a particularly close projection screen.

To the above-mentioned problem, provide a high light efficiency does not have colored ribbon polarization device, through setting up two beam splitting retes, be respectively with the light of incident broadcast picture light beam decomposition into the light of first polarization state and the light of second polarization state, and it is respectively right the light of first polarization state, the light of second polarization state reflect, because two light path optical distances are close to equal and simply adjustable, solved the problem that light path structure can't effectively focus to nearer projection screen among the prior art, the light of polarization state is divided into two parts that the optical path difference is close, and can reach the regulation coincidence purpose through simple adjustment speculum interval, can adapt the arbitrary distance that the projecting apparatus supported, including the utmost point closely. Meanwhile, the light bodies in different polarization states are separated, and the process of separating in advance from the space is avoided, so that the problem of a color ribbon appearing in the middle of a projection screen in the prior art is solved.

A high light efficiency color-ribbon-free polarizing device for projecting incident playing picture beams stereoscopically, comprising:

a linear polarizer;

a polarization modulator;

a prismatic structural body;

the prism structure body comprises a first light splitting film layer and a second light splitting film layer which are used for splitting the incident playing picture light beam into a first polarization state and a second polarization state, and an incident window used for receiving the incident playing picture light beam, the first light splitting film layer and the second light splitting film layer are vertically connected in the structure body, the first light splitting film layer comprises a first light incident portion and a second light splitting portion, and the second light splitting film layer comprises a third light splitting portion and a fourth light splitting portion.

Combine no colored ribbon polarization device of high light efficiency, in the first possible embodiment, first beam split rete with the second beam split rete is the rectangle, and hands over in diagonal department.

With the present invention in view of the above, in a first possible embodiment, in a second possible embodiment, the first dichroic portion and the third dichroic portion are disposed inside the prism structure body, the second dichroic portion and the fourth dichroic portion respectively extend to the outside from the first dichroic portion and the third dichroic portion, and the incident window is formed by enclosing the second dichroic portion and the fourth dichroic portion.

Combine first possible embodiment, in the third possible embodiment, prism structure main part is high refractive index glass prism, first beam splitting rete with the shaping of second beam splitting rete is in inside the prism structure main part.

With the first possible implementation manner and the fourth possible implementation manner of the present invention, the first light splitting film layer and the second light splitting film layer are light splitting planes, and an air interlayer is disposed in front of and/or behind the light splitting planes.

Combine first possible implementation, in the fifth possible implementation, first beam split rete be with prism structure main part side rectangle diagonal is the rectangle structure of broadside, second beam split rete be with prism structure main part bottom surface rectangle diagonal is the rectangle structure on long limit, first beam split rete with second beam split rete hands over in diagonal department.

Combine no colored ribbon polarization device of high light efficiency, in the sixth possible implementation mode, second partial lighting portion, fourth partial lighting portion be used for with incident broadcast picture light beam decomposes into first polarization state, second polarization state and will the light of first polarization state reflects, obtains first reverberation, first partial lighting portion, third partial lighting portion be used for with the light of second polarization state reflects, obtains the second reverberation.

With the above configuration, the polarizing device further includes a first reflecting portion for reflecting the light of the first polarization state to the linear polarizer and a second reflecting portion for reflecting the light of the second polarization state to the linear polarizer.

Combine no colored ribbon bias device of high light efficiency, in the eighth possible implementation mode, first reflection part sets up the left side and/or the right side of bias device, the second reflection part sets up the upside and/or the downside of bias device.

Combine no colored ribbon device of polarizing of high light efficiency, among the ninth possible embodiment, prism structure main part is still including sheltering from the screen for filter the parasitic light of transmission.

Implement high light efficiency does not have colored ribbon polarization device, through setting up two beam split retes, the light that becomes the light of first polarization state and second polarization state with incident broadcast picture light beam decomposition respectively, and it is right respectively the light of first polarization state, the light of second polarization state reflect, have solved among the prior art problem that the light path structure can't effectively focus to nearer projection screen, the light of polarization state is divided into two parts that the optical path difference is close, and can reach the accent through simple adjustment speculum interval and coincide the purpose, can the arbitrary distance that the adaptation projecting apparatus supported, including very closely. Meanwhile, the problem of a color ribbon appearing in the middle of a projection screen in the prior art is solved by integrally decomposing and reflecting incident light twice.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic front view of a prism structure body in a high-medium light efficiency color band-free polarizer of the present invention;

FIG. 2 is a schematic top view of a prism structure body in the high-high light efficiency non-color band polarizing device of the present invention;

FIG. 3 is a schematic side view of a prism structure in a high-medium light efficiency color band-free polarizer of the present invention;

fig. 4 is a schematic view of a three-dimensional view light 1 of a prism structure body in the medium and high light efficiency color band-free polarizing device of the present invention;

fig. 5 is a schematic view of a three-dimensional view light 2 of a prism structure body in the high-medium light efficiency color band-free polarizing device of the present invention;

FIG. 6 is a perspective view of a high-lighting-effect color-ribbon-less polarizer of the present invention;

FIG. 7 is a schematic top view of a high-lighting-effect non-color-band polarizing device according to the present invention;

the part names indicated by the numbers in the drawings are as follows: 100-polarizing device, 101-prism structure body, 110-incidence window, 120-first light splitting film layer, 121-second light splitting part, 122-first light splitting part, 130-second light splitting film layer, 131-fourth light splitting part, 132-third light splitting part, 200-first reflection part, 300-second reflection part, 400-linear polarizer, 410-first linear polarizer, 420-second linear polarizer, 500-polarization modulator, 510-first polarization modulator, 520-second polarization modulator.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments in the present invention, other embodiments obtained by a person of ordinary skill in the art without creative efforts all belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The whole volume of current beam split structure is too big, leads to the production installation cost too high, makes its little throw than the version price too high volume too big, and current three optical path structures have the colored ribbon to appear in the middle of the screen simultaneously, and the lens group needs adjust according to actual screen distance, to the projection screen that is very close, is difficult to accomplish focusing.

To the above-mentioned problem, a high light efficiency does not have colored ribbon device 100 that deviates from a normal position is proposed, like fig. 1-3, fig. 1 is the utility model discloses prism structure main part 101 main view schematic diagram in device 100 that deviates from a normal position is played to well high light efficiency does not have colored ribbon, fig. 2 is the utility model discloses prism structure main part 101 top view schematic diagram in device 100 that deviates from a normal position is played to well high light efficiency does not have colored ribbon, fig. 3 is the utility model discloses prism structure main part 101 side graphical representation intention in device 100 that deviates from a normal position is played to well high light efficiency does not have colored ribbon.

The utility model provides a high light efficiency does not have colored ribbon and plays device 100 that inclines, if fig. 4, fig. 4 is the utility model discloses prism structure main part 101 stereogram light 1 sketch in device 100 is played to well high light efficiency does not have colored ribbon for play picture light beam to the incident and carry out the stereographic projection, including prism structure main part 101, prism structure main part 101 is including the first beam splitting rete 120 that is arranged in playing the picture light beam with the incident and decomposes into first polarization and second polarization, second beam splitting rete 130 and be used for receiving incident window 110 of playing the picture light beam, first beam splitting rete 120 and second beam splitting rete 130 are handing-over at prism structure main part 101 inside perpendicular, first beam splitting rete 120 includes first beam splitting part 122 and second beam splitting part 121, second beam splitting rete 130 includes third beam splitting part 132 and fourth beam splitting part 131.

The first dichroic portion 122 and the third dichroic portion 132 are disposed inside the prism structure body 101, the second dichroic portion 121 and the fourth dichroic portion 131 respectively extend from the first dichroic portion 122 and the third dichroic portion 132 to the outside, and the incident window is enclosed by the second dichroic portion 121 and the fourth dichroic portion 131. The incident window 110 is formed by enclosing the second dichroic portion 121 and the fourth dichroic portion 131.

The prism structure body 101 is a high refractive index glass prism, and the first dichroic film layer 120 and the second dichroic film layer 130 are molded inside the prism structure body 101.

The first light splitting film layer 120 and the second light splitting film layer 130 are light splitting planes, and an air interlayer is arranged in front of and/or behind the light splitting planes.

The first light splitting film layer and the second light splitting film layer can be wrapped by glass or other optical materials before and after the two light splitting surfaces, and can also be partially replaced by air, and the modifications are within the protection scope of the application.

Through setting up two beam splitting retes, the light that will incide the broadcast picture light beam and decompose into the light of first polarization state and second polarization state respectively, and the light to first polarization state, the light of second polarization state reflects respectively, the light of polarization state is divided into two parts that the optical path difference is close, and can reach the accent through simple adjustment speculum interval and coincide the purpose, the problem of the unable effective focusing of light path structure to nearer projection screen among the prior art has been solved, arbitrary distance that can the adaptation projecting apparatus support, including the utmost point closely.

In some embodiments, the second light splitting part 121 and/or the fourth light splitting part 131 is configured to split the incident broadcast image light beam into light of a first polarization state and light of a second polarization state, and the first light splitting part 122 and/or the third light splitting part 132 is configured to reflect the light of the second polarization state.

As fig. 5, fig. 5 is the utility model discloses among the device 100 that inclines is played to no colored ribbon of medium and high light efficiency prism structure main part 101 stereogram light 2 sketch, second beam split part 121 and fourth beam split part 131 can have beam split, reflex action simultaneously, also can a single beam split, reflect, first beam split part 122 and third beam split part 132 can reflect the light of second polarization state simultaneously, also can a single beam split reflect, all belong to the protection scope of this application. In a preferred embodiment of the present application, the second dichroic portion 121 and the fourth dichroic portion 131 may each split and reflect an incident light beam, and the first dichroic portion 122 and the third dichroic portion 132 may each reflect light in the second polarization state.

First beam splitting membrane layer 120 and second beam splitting membrane layer 130 hand-over, first beam splitting membrane layer 120 and second beam splitting membrane layer 130 are the beam splitting plane, and the selfing junction divides into inside and outside two parts with two beam splitting planes, and the part of outside is used for decomposing the light that the incident broadcast picture light beam is the light of first polarization state and second polarization state to the light of the first polarization state that will decompose reflects. The inner portion is for reflecting light of the second polarization state. Through the above decomposition and the reflection of the light in the first polarization state and the light in the second polarization state respectively, the problem of the color band appearing in the middle of the projection screen in the prior art is avoided.

In some embodiments, the prismatic structured body 101 may be designed to resemble a rectangular parallelepiped, lacking a beveled corner, with the entire bottom, side, and front portions being rectangular. The first dichroic film layer 120 and the second dichroic film layer 130 are rectangular dichroic planes, and the middle portions of the dichroic planes of the first dichroic film layer 120 and the second dichroic film layer 130 are connected.

In some embodiments, the first dichroic film layer 120 has a rectangular structure with a diagonal of a rectangle on the side of the prism structure body 101 as a wide side, the second dichroic film layer 130 has a rectangular structure with a diagonal of a rectangle on the bottom of the prism structure body 101 as a long side, and the first dichroic film layer 120 and the second dichroic film layer 130 meet each other at the diagonal. The intersection line of the first light splitting film layer 120 and the second light splitting film layer 130 is a diagonal line, the plane of the first light splitting film layer 120 is a long inclined plane inclined to the left and right of the prism structure body 101, and the plane of the second light splitting film layer 130 is a short inclined plane inclined to the top and bottom of the prism structure body 101.

As shown in fig. 6 and fig. 6, the medium-high light effect color ribbon-free polarizer 100 of the present invention is a three-dimensional illustration, wherein the second light splitting part 121 and the fourth light splitting part 131 are used for splitting the incident playing image beam into the first polarization state and the second polarization state and reflecting the light in the first polarization state to obtain the first reflected light, and the first light splitting part 122 and the third light splitting part 132 are used for reflecting the light in the second polarization state to obtain the second reflected light.

After the light at the upper left portion of the incident window 110 passes through the spectroscopic surface of the second dichroic portion 121, as shown in the figure, most of the resolved light in the first polarization state is reflected to the right to exit the spectroscopic structure as the first reflected light. The light of the second polarization state continues to the splitting surface of the third light splitting part 132, which is equivalent to the light of the first polarization state for the surface, and is reflected to the upper side out of the light splitting structure.

After the light in the lower right portion of the incident window 110 passes through the light splitting surface of the fourth light splitting part 131, as shown in the figure, most of the split light in the first polarization state is reflected to the right to exit the light splitting structure as the first reflected light. The light of the second polarization state continues to the spectroscopic surface of the fourth light-splitting part 131, which corresponds to the light of the first polarization state, and is reflected to the upper side to exit the spectroscopic structure.

Further, the polarization device 100 further includes a first reflection part 200 for reflecting the light with the first polarization state to the polarization modulator and a second reflection part 300 for reflecting the light with the second polarization state to the polarization modulator. The first reflection part 200 is disposed at the left and/or right side of the polarizing device 100, and the second reflection part 300 is disposed at the upper and/or lower side of the polarizing device 100.

As shown in fig. 7, fig. 7 is a schematic top view of the high-light-efficiency non-color band polarizer 100 of the present invention, the polarizer 100 further includes a linear polarizer 400, the linear polarizer 400 includes a first linear polarizer 410 and a second linear polarizer 420, and the first linear polarizer 410 and the second linear polarizer 420 are respectively disposed corresponding to the emergent light paths of the first reflecting portion 200 and the second reflecting portion 300. The polarization device 100 further includes a polarization modulator 500, which includes a first polarization modulator 510 and a second polarization modulator 520, wherein the first polarization modulator 510 and the second polarization modulator 520 are respectively disposed corresponding to the first linear polarizer 410, the second linear polarizer 420 and the third linear polarizer. The light reflected by the first and second reflection parts 200 and 300 passes through the linear polarizer and the polarization modulator and is projected onto a screen.

Implement the utility model discloses a high light efficiency does not have colored ribbon polarization device 100, through setting up two beam splitting retes, the light of the light sum second polarization state that will incide broadcast picture light beam to decompose into first polarization state respectively, and the light to first polarization state respectively, the light of second polarization state reflects, the light of polarization state is divided into the two parts that the optical path difference is close, and can reach the accent coincidence purpose through simple adjustment speculum interval, the problem of the unable effective focusing of light path structure to nearer projection screen among the prior art has been solved, the arbitrary distance that can the adaptation projecting apparatus support, including very close range. Meanwhile, through the decomposition and the twice reflection, the problem of a color ribbon appearing in the middle of the projection screen in the prior art is solved.

The above description is only for the preferred embodiment of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (10)

1. A high light efficiency non-color ribbon polarizing device for projecting incident playing picture beams stereoscopically, comprising:

a linear polarizer;

a polarization modulator;

a prismatic structural body;

the prism structure body comprises a first light splitting film layer and a second light splitting film layer which are used for splitting the incident playing picture light beam into a first polarization state and a second polarization state, and an incident window used for receiving the incident playing picture light beam, the first light splitting film layer and the second light splitting film layer are vertically connected in the prism structure body, the first light splitting film layer comprises a first light incident part and a second light splitting part, and the second light splitting film layer comprises a third light splitting part and a fourth light splitting part.

2. The high light efficiency color-ribbon-free polarizer of claim 1 wherein the first and second light splitting film layers are rectangular and meet at a diagonal.

3. The high luminous efficiency non-colored ribbon polarizing device according to claim 2, wherein the first dichroic portion and the third dichroic portion are disposed inside the prism structure body, the second dichroic portion and the fourth dichroic portion extend from the first dichroic portion and the third dichroic portion to the outside, respectively, and the incident window is enclosed by the second dichroic portion and the fourth dichroic portion.

4. The high light efficiency, colorband-free polarizing device of claim 2 wherein said prismatic structure body is a high index glass prism and said first and second dichroic film layers are molded inside said prismatic structure body.

5. The high light efficiency color-ribbon-free polarizing device according to claim 2, wherein the first light splitting film layer and the second light splitting film layer are light splitting planes, and an air interlayer is disposed in front of and/or behind the light splitting planes.

6. The high light efficiency color-ribbon-free polarizing device according to claim 2, wherein the first light splitting film layer is a rectangular structure with a rectangular diagonal of the side surface of the prism structure body as a wide side, the second light splitting film layer is a rectangular structure with a rectangular diagonal of the bottom surface of the prism structure body as a long side, and the first light splitting film layer and the second light splitting film layer meet at the diagonal.

7. The high luminous efficiency color-ribbon-free polarizer according to claim 1, wherein the second and fourth light splitting parts are configured to split the incident broadcast image light beam into a first polarization state and a second polarization state and reflect the light in the first polarization state to obtain a first reflected light, and the first and third light splitting parts are configured to reflect the light in the second polarization state to obtain a second reflected light.

8. The high light efficiency color-ribbon-free polarizing device of claim 1, further comprising a first reflecting portion for reflecting the light of the first polarization state to a linear polarizer and a second reflecting portion for reflecting the light of the second polarization state to a linear polarizer.

9. The high light efficiency ribbon-free polarizing device according to claim 8, wherein the first reflecting portion is disposed at a left side and/or a right side of the polarizing device, and the second reflecting portion is disposed at an upper side and/or a lower side of the polarizing device.

10. The high luminous efficacy ribbon-free polarizer device of any of claims 1-9, wherein the prismatic structured body further comprises a blocking screen for filtering transmitted stray light.

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