CN107678165A - The display device and intelligent glasses of augmented reality - Google Patents
The display device and intelligent glasses of augmented reality Download PDFInfo
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- CN107678165A CN107678165A CN201711121089.7A CN201711121089A CN107678165A CN 107678165 A CN107678165 A CN 107678165A CN 201711121089 A CN201711121089 A CN 201711121089A CN 107678165 A CN107678165 A CN 107678165A
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- 230000003190 augmentative effect Effects 0.000 title claims abstract description 44
- 239000011521 glass Substances 0.000 title abstract description 10
- 230000010287 polarization Effects 0.000 claims abstract description 37
- 238000009792 diffusion process Methods 0.000 claims description 19
- 239000004984 smart glass Substances 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 17
- 235000009537 plain noodles Nutrition 0.000 description 18
- 230000002708 enhancing effect Effects 0.000 description 5
- 238000005286 illumination Methods 0.000 description 5
- 238000005282 brightening Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
-
- 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
-
- 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
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
-
- 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
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
-
- 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
- G02B2027/0112—Head-up displays characterised by optical features comprising device for genereting colour display
- G02B2027/0114—Head-up displays characterised by optical features comprising device for genereting colour display comprising dichroic elements
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Abstract
The invention provides a kind of display device of augmented reality and intelligent glasses, it is related to the technical field that augmented reality is shown, the display device of the augmented reality, including：Light source, light guide plate, polarization spectroscope and the display panel set gradually, the light guide plate includes incidence surface and exiting surface, the incidence surface is towards the light source, the exiting surface is towards the polarization spectroscope, so that the light that the light source is sent enters the polarization spectroscope after the light guide plate, the polarization spectroscope is used to be separated polarised light P light and S light, and the display panel produces image after receiving the polarised light P light；Equal optical device is provided between the light source and polarization spectroscope, for improving the uniformity of the light of irradiation on a display panel.Equal optical device can increase the uniformity of light, so as to so that the light being radiated on display panel is more uniform, so as to which the brightness of the image formed is more uniform.
Description
Technical Field
The invention relates to the technical field of augmented reality display, in particular to a display device for augmented reality and intelligent glasses.
Background
With the progress of computer hardware and software technology and optical design and manufacturing technology, Virtual Reality (VR), Augmented Reality (AR) and Mixed Reality (MR) technology are developed rapidly. For example, augmented reality, which is to project or superimpose a picture onto reality directly through a computer, means that an immersive virtual visual experience is not needed, and the picture projected by the augmented reality can be effectively interacted with directly in a real-life scene without other interactive devices such as an operation handle.
The augmented reality display device presents computer-generated image information to a user. The augmented reality display device has two modes of video perspective and optical perspective for realizing the superposition of visual information, and the optical perspective is a better means for superposing virtual information. By using the image superposition mode of optical perspective, the user can not only directly see the real environment around, but also see the enhanced image or information generated by the computer.
Wearable intelligent glasses are an important branch in augmented reality display equipment, and most optical lighting mode combined optical imaging modes are adopted in the display technology at present, however, traditional optical lenses are adopted in the optical lighting modes, and the current situation of the lighting modes is that the system structure is various, the number of optical parts is too large, the size and the weight are relatively large, and the like. Especially, the uniformity of optical illumination is not high, and the light efficiency utilization rate is poor.
Disclosure of Invention
The invention aims to provide a display device for augmented reality and intelligent glasses, and solves the technical problems that the existing display device for augmented reality is low in uniformity of optical illumination and poor in light efficiency utilization rate.
The augmented reality display device provided by the invention comprises: the display panel receives the polarized light P light and generates an image;
and a light equalizing device is arranged between the light source and the polarization spectroscope and used for improving the uniformity of light irradiated on the display panel.
Furthermore, the outer side of the light guide plate is provided with surface reflectors at intervals, and the reflecting surfaces of the surface reflectors face the light guide plate and are used for preventing light from leaking from the side wall of the light guide plate in the process of moving between the light incident surface and the light emergent surface.
Further, the light-equalizing device comprises a light bar, and the light bar is arranged between the light source and the light incident surface of the light guide plate;
the light bar is provided with an edge reflector in the circumferential direction close to the end part of the light guide plate, and the emitting surface of the edge reflector faces the light incident surface and is used for reducing light quantity leakage.
Furthermore, a first diffusion sheet is arranged between the light bar and the light incident surface of the light guide plate and used for changing the incident angle of light entering the light incident surface of the light guide plate; or,
a second diffusion sheet is arranged between the light guide plate and the polarization spectroscope and used for changing the incident angle of light entering the polarization spectroscope; or,
a first diffusion sheet is arranged between the light bar and the light incident surface of the light guide plate and used for changing the incident angle of light entering the light incident surface of the light guide plate; and a second diffusion sheet is arranged between the light guide plate and the polarization beam splitter and used for changing the incident angle of the light entering the polarization beam splitter.
Furthermore, a brightening mirror is arranged between the light emitting surface of the light guide plate and the polarizing beam splitter, and a plurality of V-shaped grooves are arranged on one surface of the polarizing beam splitter side by side, facing the brightening mirror.
Furthermore, augmented reality's display device includes the polaroid, the polaroid is located one side of polarization spectroscope, and with display panel parallel arrangement, the polaroid is used for improving the contrast of display image.
Furthermore, a groove is arranged on the light incident surface of the light guide plate and the surface opposite to the light emergent surface.
Furthermore, a groove is formed in the light emitting surface.
Furthermore, the cross section of the groove is V-shaped or circular arc-shaped.
The intelligent glasses comprise the augmented reality display device.
The augmented reality display device provided by the invention comprises: light source, light guide plate, polarizing beam splitter and display panel that set gradually, the light guide plate is including going into the plain noodles and going out the plain noodles, go into the plain noodles orientation the light source, go out the plain noodles orientation polarizing beam splitter, the light that the light source sent gets into the back from the income plain noodles of light guide plate, jets out the entering from the play plain noodles of light guide plate polarizing beam splitter, light can make the polarized light P light of certain angle take place the reflection after passing through polarizing beam splitter, and the polarized light S light of certain angle directly sees through, display panel receives can produce the image behind the polarized light P light, be provided with the light equalizing device between light source and the polarizing beam splitter, the light equalizing device can increase the homogeneity of light to can make the more even of the light of shining on display panel, thereby the more even of the luminance of the image.
The intelligent glasses comprise the augmented reality display device. Augmented reality' S display device is including the light source, light guide plate, polarization spectroscope and the display panel that set gradually, the light guide plate is including going into the plain noodles and going out the plain noodles, go into the plain noodles orientation the light source, go out the plain noodles orientation polarization spectroscope, the light that the light source sent gets into the back from the income plain noodles of light guide plate, jets out from the play plain noodles of light guide plate and gets into polarization spectroscope, light can make the polarized light P light of certain angle take place the reflection after passing through polarization spectroscope, and the polarized light S light of certain angle directly sees through, display panel receives can produce the image behind the polarized light P light, be provided with the light equalizing device between light source and the polarization spectroscope, the light equalizing device can increase the homogeneity of light to can make the more even of the light of shining on display panel, thereby the luminance of the image.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of an augmented reality display device according to embodiment 1 of the present invention;
fig. 2 is a schematic diagram of an augmented reality display device according to embodiment 2 of the present invention;
fig. 3 is a schematic diagram of an augmented reality display device according to embodiment 3 of the present invention;
fig. 4 is a partially enlarged view of a position a in fig. 3.
Icon: 100-a light source; 200-a light bar; 310-edge mirrors; 320-plane mirror; 410-a first diffuser; 420-a second diffuser; 500-a light guide plate; 510-a groove; 600-a brightness enhancing mirror; 700-a polarizing beam splitter; 800-a display panel; 900-polarizer.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The present invention provides an augmented reality display device, and the following provides a plurality of embodiments to describe in detail the structure of the augmented reality display device provided by the present invention.
Example 1
As shown in fig. 1, the augmented reality display device according to the present invention includes: light source 100, light guide plate 500, polarizing beam splitter 700 and display panel 800 that set gradually, light guide plate 500 is including going into the plain noodles and going out the plain noodles, go into the plain noodles orientation light source 100, go out the plain noodles orientation polarizing beam splitter 700, the light that light source 100 sent gets into the back from the income plain noodles of light guide plate 500, the play plain noodles of following light guide plate 500 jets out the entering polarizing beam splitter 700, and the light can make the polarized light P light of certain angle take place the reflection behind polarizing beam splitter 700, and the polarized light S light of certain angle directly sees through, display panel 800 receives can produce the image behind the polarized light P light, be provided with the light equalizing device between light source 100 and the polarizing beam splitter 700, the light equalizing device can increase the homogeneity of light to can make the more even of the light that shines on display panel 800, thereby the luminance of the image that forms more even.
In order to reduce the volume of the augmented reality display device, the light incident surface of the light guide plate 500 may be perpendicular to the light emitting surface, and the light emitted from the light source 100 may be bent after passing through the light guide plate 500 and enter the polarization beam splitter 700, so that the length of the augmented reality display device may be reduced by changing the propagation path of the light.
In order to make the light emitted from the light source 100 irradiate the display panel 800 as much as possible and prevent the loss of the light amount emitted from the light source 100, the surface reflectors 320 are spaced outside the light guide plate 500, that is, the surface reflectors 320 may be disposed outside the other surfaces of the light guide plate 500 except the light emitting surface and the light emitting surface, the reflective surfaces of the surface reflectors 320 face the light guide plate 500, the light emitted from the other surfaces of the light guide plate 500 may return to the light guide plate 500 through the reflection of the surface reflectors, and then may be emitted from the light emitting surface through multiple reflection, so that the loss of the light may be prevented, the light amount of the light emitted from the light emitting surface may be increased, and the brightness of the finally generated image may be increased.
In order to improve the uniformity of light irradiated from the light source 100 on the display panel 800, the light equalizing device may include a light bar 200, the light bar 200 is disposed between the light source 100 and the light incident surface of the light guide plate 500, light emitted from the light source 100 enters from one end surface of the light bar 200 and exits from the other end surface into the light incident surface of the light guide plate 500, the light bar 200 may improve the uniformity of light, and the shape of the cross section of the light bar 200 may be the same as the shape of the image forming surface of the display panel 800.
The projection of the light exiting surface of the light bar 200 onto the light entering surface of the light guide plate 500 falls within the light entering surface of the light guide plate 500, so that the light guide plate 500 can completely receive the light exiting from the light exiting surface of the light bar 200.
The size of the light bar 200 may be 12 mm plus or minus 0.1mm in length, 3.5 mm plus or minus 0.1mm in width, and 3.0mm to 3.1mm in height.
In order to prevent light from being emitted from the edge of the light incident surface, an edge reflector 310 is disposed on the end of the light bar 200 near the light guide plate 500 in the circumferential direction, and the emitting surface of the edge reflector 310 faces the light incident surface to reduce leakage of light.
Further, a first diffusion sheet 410 is disposed between the light bar 200 and the light incident surface of the light guide plate 500, and light rays continuously pass through two media with different refractive indexes when passing through the first diffusion sheet 410, so that the light rays are refracted, reflected and scattered, and thus the optical diffusion effect is achieved. After passing through the first diffusion sheet 410, the light entering the light incident surface of the light guide plate 500 is changed in incident angle, so that the light can be more uniform.
A second diffusion sheet 420 may be further disposed between the light guide plate 500 and the polarization beam splitter 700 to change an incident angle of light entering the polarization beam splitter 700.
The diffusion angles of the first and second diffusion sheets 410 and 420 may be 40 degrees.
A brightness enhancement mirror 600 is arranged between the light-emitting surface of the light guide plate 500 and the polarization beam splitter 700, and a plurality of V-shaped grooves are arranged side by side on one surface of the brightness enhancement mirror 600 facing the polarization beam splitter 700. When the brightness enhancement mirror 600 is used, only light with incident light within a certain angle range can exit through refraction when the light passes through the V-shaped groove structure, and the rest of the light is reflected back to the light guide plate 500 by the edge of the V-shaped groove because the refraction condition is not satisfied, and then exits again by the action of the reflective sheet at the bottom of the light guide plate 500. Thus, the light emitted from the light guide plate 500 is continuously recycled under the effect of the V-shaped groove structure, and the light originally diffused in each direction is controlled to a certain angle range after passing through the brightness enhancement mirror 600, so as to achieve the effect of enhancing the axial brightness.
The brightness enhancing mirror 600 also functions as a polarization sorting function, with the majority of the light exiting the brightness enhancing mirror 600 being p-light.
The display panel 800 may be a display chip LCoS, polarized light emitted by the polarizing beam splitter 700 is irradiated on the reflective display panel 800, the display panel 800 may generate an image, and the image is emitted out after passing through the polarizing beam splitter 700 again.
The light emitted from the light source 100 is transmitted to the display panel 800, and after the display panel 800 is imaged, the image formed by the display panel 800 may be mixed with parasitic light, the augmented reality display device may include a polarizer 900, the polarizer 900 is located on one side of the polarization beam splitter 700 and is parallel to the display panel 800, and the polarizer 900 is used to reduce the polarized light S in the image generated by the display panel 800.
In one embodiment, the display device for augmented reality according to the present invention may include a light source 100, the light source 100 being an LED, a light bar 200, a first diffusion sheet 410, and a light guide plate 500 disposed in sequence from left to right, and a reflector disposed outside the light guide plate 500; the second diffusion sheet 420, the brightness enhancement mirror 600 and the polarization splitting prism are sequentially positioned above the light-emitting surface of the light guide plate 500; the LCoS display chip and the polarizer 900 are respectively arranged on the left side and the right side of the polarization beam splitter prism. The optical illumination system is a key part for generating uniform rectangular light spots, and the optical principle is as follows: the light that is launched by LED light source 100 at first carries out the even light and the plastic of light beam through light stick 200, then pass through first diffusion piece 410 again, light guide plate 500 realizes further even light, the light path behind light guide plate 500 will take place the direction turn, and pass through second diffusion piece 420 in proper order, the promotion to luminance is realized to brightening mirror 600, then light transmission passes through polarization beam splitter prism, shine the polarized light to display chip LCoS surface, finally after the modulation of LCoS display chip, the reflection gets into polarization beam splitter prism once more, the polaroid gets into imaging system, thereby realized leading-in to imaging system with display chip LCoS chip display image. The optical illumination module in the system adopts the dual light homogenizing devices of the light bar 200 and the light guide plate 500, so that the final uniform rectangular light spots are more uniform, and the image quality observed by human eyes is optimized. Meanwhile, the brightness enhancement mirror 600 adopted by the optical illumination module in the system can effectively improve the light utilization rate of the light source 100, so that the brightness value observed by the arriving personnel is higher.
Example 2
As shown in fig. 2, the difference from embodiment 1 is that a groove 510 is disposed on the light incident surface of the light guide plate 500 and the surface opposite to the light emitting surface, and the groove 510 may be V-shaped or circular arc-shaped. When the light incident surface of the light barrier is a plane, the energy of the light near the first diffusion sheet 410 is concentrated, and the energy is gradually reduced in the process of transmitting to the rear end, so that the uniformity of the emergent light is poor, and the structure of the groove 510 is added, so that the light can be reflected for many times in the light guide plate 500, and the uniformity of the light spots can be improved. Similarly, the surface opposite to the light exit surface is provided with a groove 510, which can destroy the total reflection structure of the surface, and light is refracted by the surface of the light guide plate 500 opposite to the light exit surface, reflected by the reflector outside the light guide plate, and then enters the light guide plate 500 again.
Specifically, the groove 510 of the light guide plate 500 may be circular arc-shaped, the width of the light incident surface groove is 0.5mm, the depth of the groove is 0.15mm, the radius of the groove is 0.3mm, the width of the reflective surface groove is 0.5mm, the depth of the groove is 0.15mm, the radius of the reflective surface groove is 0.3mm, and the light emergent surface is a smooth plane.
Example 3
As shown in fig. 3-4, the difference from embodiment 2 is that a groove 510 is disposed on the light emitting surface. In order to prevent the light exiting surface of the light guide plate 500 from being totally reflected, thereby causing a decrease in the amount of light entering the brightness enhancing mirror 600. The groove 510 structure is added, so that light in the light guide plate 500 can be reflected for multiple times, and the uniformity of rectangular light spots is better.
Specifically, the groove 510 of the light guide plate 500 is V-shaped, the width of the light incident surface groove is 0.035mm, the depth of the groove is 0.030mm, the angle is 60 °, the width of the reflection surface groove is 0.010mm, the depth of the groove is 0.003mm, the angle is 120 °, the width of the light emitting surface groove is 0.080mm, the depth of the groove is 0.015mm, and the angle is 90 °.
The intelligent glasses provided by the invention comprise a glasses frame, an imaging system and the augmented reality display device. The augmented reality display device includes a light source 100, a light guide plate 500, a polarizing beam splitter 700 and a display panel 800 arranged in sequence, the light guide plate 500 includes a light incident surface facing the light source 100, the light-emitting surface faces the polarization beam splitter 700, and after the light emitted from the light source 100 enters from the light-entering surface of the light guide plate 500, the light emitted from the light emitting surface of the light guide plate 500 enters the polarization beam splitter 700, and after passing through the polarization beam splitter 700, the polarized light P at a certain angle is reflected, and the polarized light S at a certain angle is directly transmitted, the display panel 800 can generate an image after receiving the polarized light P, and a light equalizing device is disposed between the light source 100 and the polarizing beam splitter 700, which can increase the uniformity of light, so that the light irradiated on the display panel 800 can be more uniform and the brightness of the formed image can be more uniform.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An augmented reality display device, comprising: the display panel receives the polarized light P light and generates an image;
and a light equalizing device is arranged between the light source and the polarization spectroscope and used for improving the uniformity of light irradiated on the display panel.
2. The augmented reality display device of claim 1, wherein a surface reflector is spaced outside the light guide plate, and a reflective surface of the surface reflector faces the light guide plate to prevent light from leaking from a sidewall of the light guide plate during movement between the light incident surface and the light emitting surface.
3. The augmented reality display device of claim 2, wherein the light homogenizing device comprises a light bar disposed between the light source and the light incident surface of the light guide plate;
the light bar is provided with an edge reflector in the circumferential direction close to the end part of the light guide plate, and the emitting surface of the edge reflector faces the light incident surface and is used for reducing light quantity leakage.
4. The augmented reality display device of claim 3, wherein a first diffuser is disposed between the light bar and the light incident surface of the light guide plate for changing an incident angle of light entering the light incident surface of the light guide plate; or,
a second diffusion sheet is arranged between the light guide plate and the polarization spectroscope and used for changing the incident angle of light entering the polarization spectroscope; or,
a first diffusion sheet is arranged between the light bar and the light incident surface of the light guide plate and used for changing the incident angle of light entering the light incident surface of the light guide plate; and a second diffusion sheet is arranged between the light guide plate and the polarization beam splitter and used for changing the incident angle of the light entering the polarization beam splitter.
5. The augmented reality display device of claim 4, wherein a brightness enhancement mirror is disposed between the light exit surface of the light guide plate and the polarization beam splitter, and a plurality of V-shaped grooves are disposed side by side on a surface of the brightness enhancement mirror facing the polarization beam splitter.
6. The augmented reality display device of claim 1, wherein the augmented reality display device comprises a polarizer, the polarizer is located on one side of the polarizing beam splitter and is arranged in parallel with the display panel, and the polarizer is used for improving the contrast of the display image.
7. The augmented reality display device of claim 1, wherein a groove is disposed on the light incident surface of the light guide plate and a surface opposite to the light emergent surface.
8. The augmented reality display device of claim 7, wherein a groove is disposed on the light emitting surface.
9. Augmented reality display device according to claim 7 or 8, wherein the cross-section of the groove is V-shaped or circular arc-shaped.
10. Smart glasses comprising an augmented reality display device according to any one of claims 1 to 9.
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| CN201711121089.7A CN107678165A (en) | 2017-11-14 | 2017-11-14 | The display device and intelligent glasses of augmented reality |
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| CN111025658A (en) * | 2019-12-31 | 2020-04-17 | 上海视欧光电科技有限公司 | Augmented reality optical module and augmented reality equipment |
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