CN114594598A - Display system for realizing double-view-field projection - Google Patents
Display system for realizing double-view-field projection Download PDFInfo
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- CN114594598A CN114594598A CN202011393787.4A CN202011393787A CN114594598A CN 114594598 A CN114594598 A CN 114594598A CN 202011393787 A CN202011393787 A CN 202011393787A CN 114594598 A CN114594598 A CN 114594598A
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- 230000010287 polarization Effects 0.000 claims abstract description 61
- 238000003384 imaging method Methods 0.000 claims abstract description 37
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 230000009977 dual effect Effects 0.000 claims abstract description 9
- 239000004973 liquid crystal related substance Substances 0.000 claims description 12
- 238000007493 shaping process Methods 0.000 claims description 8
- 229910052724 xenon Inorganic materials 0.000 claims description 4
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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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
- G02B27/28—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
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3152—Modulator illumination systems for shaping the light beam
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3164—Modulator illumination systems using multiple light sources
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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
- G02B2027/014—Head-up displays characterised by optical features comprising information/image processing systems
Abstract
One embodiment of the present invention discloses a display system for implementing dual field of view projection, comprising: the control module receives at least two paths of video signals and carries out frame-by-frame staggered mixing on the two paths of video signals to generate a mixed video signal; the imaging system receives the mixed video signal and then generates mixed polarization image light, wherein the mixed polarization image light comprises linearly polarized light with various polarization directions which are staggered frame by frame; and the polarization beam splitting system is used for splitting the mixed polarization image light containing different polarization directions into a plurality of optical paths with preset polarization directions. The invention also provides a scheme for realizing double-view field display by utilizing the existing mature technology and elements, and realizes simultaneous double-view field display of one optical machine.
Description
Technical Field
The present invention relates to the field of projection displays. And more particularly to a display system that implements dual field of view projection.
Background
The dual-view display is that two different separate images or videos can be played simultaneously through one display system, and has a wide application prospect, for example, in the head-up display technology, front passengers can watch entertainment or sports programs while a navigation picture is provided for a driver through one projection system; at present, the double-view field display technology mainly stays in a laboratory stage, such as a double-view field integral display technology and a double-view field display technology based on a spatial light modulator and a grating.
The prior art has the defects of small field angle, immature devices, small resolution and large calculation amount.
Disclosure of Invention
It is an object of the present invention to provide a display system implementing dual field of view projection to address at least one of the problems with the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a display system for realizing dual-field projection, which comprises:
the control module receives at least two paths of video signals and carries out frame-by-frame staggered mixing on the two paths of video signals to generate a mixed video signal;
the imaging system receives the mixed video signal and then generates mixed polarization image light, wherein the mixed polarization image light comprises linearly polarized light with various polarization directions which are staggered frame by frame;
and the polarization beam splitting system is used for splitting the mixed polarization image light containing different polarization directions into a plurality of optical paths with preset polarization directions.
In one particular embodiment, the imaging system includes: a light source for emitting light;
an imaging chip for receiving the light and generating a mixed video image light according to the mixed video signal; and
and the modulation polarizer is used for modulating the mixed video image light into the mixed polarized image light according to the mixed video signal.
In a specific embodiment, the imaging system further comprises a shaping optical path, and the shaping optical path is used for expanding, shimming and/or decoherence of the light emitted by the light source.
In one embodiment, the shaped optical path includes a lens, a reflective mirror, a light homogenizing sheet, and/or a light guide.
In a specific embodiment, the light source is a xenon light source, an LED light source, or a laser light source.
In a specific embodiment, the imaging chip is a DMD, LCOS or LCD.
In one embodiment, the modulating polarizer is a liquid crystal polarizer.
In a specific embodiment, the plurality of light paths are respectively provided with a lens for imaging the light passing through the polarization splitting system on a screen.
In a specific embodiment, the polarization beam splitting system is a polarization beam splitting prism, a Glan prism or a Wollaston prism.
The invention has the following beneficial effects:
the invention provides a display system for realizing dual-field projection, which realizes simultaneous dual-field display of one optical machine and has the advantages of low cost and strong producibility.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings;
FIG. 1 illustrates a system block diagram of a display system implementing dual field of view projection in accordance with one embodiment of the present application.
FIG. 2 shows a schematic diagram of a display system implementing dual field of view projection according to one embodiment of the present application.
FIG. 3 shows a schematic diagram of a display system implementing dual field of view projection according to another embodiment of the present application.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
First embodiment
FIG. 1 illustrates a system block diagram of a display system implementing dual field of view projection according to one embodiment of the present application.
The invention discloses a display system for realizing double-field projection, which comprises a control module, an imaging system, a polarization beam splitting system and a lens, wherein the control module is used for controlling the imaging system to emit light; when the dual-view field projection display is realized, the control module receives at least two paths of video signals and staggers and mixes the two paths of video signals frame by frame to generate a mixed video signal. The imaging system receives the mixed video signal and then generates mixed polarization image light, wherein the mixed polarization image light comprises linearly polarized light with various polarization directions which are staggered frame by frame; and the polarization beam splitting system is used for splitting the mixed polarization image light containing different polarization directions into a plurality of optical paths with preset polarization directions. The lenses (i.e., lenses) are respectively disposed on a plurality of light paths for imaging the light passing through the polarization splitting system on a screen.
In one embodiment, the imaging system as shown in FIG. 2 includes: the device comprises a light source 201, a shaping light path 206, an imaging chip DMD203 and a modulation polarizer. When the double-view-field projection is carried out, the control module is used for carrying out power supply and signal control on the system; in one embodiment, the control module includes a signal source and a signal processor 202, in one embodiment, the signal source is a computer 209, and those skilled in the art will appreciate that the signal source may be generated by other signal generating devices, and the present invention is only exemplary and not limited thereto. Two images or videos in the computer 209 are transmitted to the signal processor 202 frame by frame through data lines, and the processor 202 converts the two received images or videos into various modulation signals and transmits the signals to the imaging chip and the modulation polarizer; in one embodiment, the modulating polarizer is a liquid crystal polarizer. In one embodiment, the imaging chip is a DMD.
In one embodiment, the light source 201 is an RGB three-color laser light source, RGB laser light is output according to three color sequences of red, green and blue by signal modulation of the signal processor 202, and the shaping optical path 206 is configured to receive a light beam emitted by the light source, where the shaping optical path includes a lens, a reflective mirror, a light homogenizing sheet and/or a light guiding column. After beam expanding, shimming and decoherence processes, the light beams irradiate on the imaging chip DMD203 according to the time sequence of red, green and blue. The imaging chip DMD203 modulates the received light beams through the modulation signals sent by the control module, and forms two images or video non-polarized light images or partial polarized light images frame by frame, wherein each frame image is sequentially irradiated by a red, green and blue light source to form a red, green and blue gray scale image, and a color image is synthesized by utilizing the integral effect of human eyes; and transmits the image to the liquid crystal polarizer 204.
In one embodiment, the liquid crystal polarizer 204 converts the received unpolarized light or partially polarized light image into a linearly polarized image, and the polarization direction is modulated into two polarized images perpendicular to each other according to different screens to be projected, and the liquid crystal polarizer 204 is controlled by the signal processor 202 to modulate the image into horizontal polarization or vertical polarization. For example, all left view pictures are horizontally polarized, right view pictures are vertically polarized, or vice versa; the alternating sequence and method of the left and right fields of view is implemented according to different algorithms.
In one embodiment, the polarization splitting system is a PBS splitting prism.
In a specific embodiment, the modulated image passes through the PBS beam splitting prism 205, which splits the light with different polarization directions, thereby separating the pictures; the separated pictures are projected onto a screen 208 through a lens 207, so that double-field projection is realized.
In one embodiment, different frames of two screens are imaged alternately frame by frame, and the polarization modulation directions of the imaging chip DMD203 and the liquid crystal polarizer 204 are synchronously controlled by the signal processor 202, so as to separate different frames.
In a specific embodiment, the light source is a xenon light source, an LED light source, or a laser light source.
In a specific embodiment, the imaging chip is a DMD, LCOS or LCD.
In a specific embodiment, the polarization beam splitting system is a polarization beam splitting prism, a Glan prism or a Wollaston prism.
The invention provides a display system for realizing dual-field projection, which realizes simultaneous dual-field display of one optical machine and has the advantages of low cost and strong producibility.
Second embodiment
The invention discloses a display system for realizing double-field projection, which comprises a control module, an imaging system, a polarization beam splitting system and a lens, wherein the control module is used for controlling the imaging system to emit light; when the dual-view-field projection is realized, the control module receives at least two paths of video signals and staggers and mixes the two paths of video signals frame by frame to generate a mixed video signal. The imaging system receives the mixed video signal and then generates mixed polarization image light, wherein the mixed polarization image light comprises linearly polarized light with various polarization directions which are staggered frame by frame; and the polarization beam splitting system is used for splitting the mixed polarization image light containing different polarization directions into a plurality of optical paths with preset polarization directions. The lenses (i.e., lenses) are respectively disposed on a plurality of light paths for imaging the light passing through the polarization splitting system on a screen.
In one particular embodiment, as shown in FIG. 3, the imaging system comprises: a light source, a shaped light path 304, an imaging chip LCD305 and a modulation polarizer. And when the double-view-field projection is carried out, the control module is used for supplying power and controlling signals to the system. In a specific embodiment, the control module comprises a computer 310 and a signal processor 307, wherein two images or videos in the computer 310 are transmitted to the signal processor 307 frame by frame through data lines, and the signal processor 307 converts the two received images or videos into a plurality of modulation signals and transmits the modulation signals to the imaging chip and the modulation polarizer; in one embodiment, the modulating polarizer is a liquid crystal polarizer. In one embodiment, the imaging chip is an LCD.
In a specific embodiment, the light source adopts an RGB three-color laser light source, a red laser 301, a green laser 302, and a blue laser 303, the three-color laser performs beam expansion, shimming, and decoherence through a shaping optical path 304, and then is modulated through an imaging chip LCD305 to form a red, green, and blue image, and then passes through a synthesis prism to form a color image. The shaping light path comprises a lens, a reflecting plane mirror, a light homogenizing sheet and/or a light guide column. In a specific embodiment, the imaging chip LCD305 modulates the received light beam through the modulation signal sent by the control module, and forms two images or video non-polarized light images or partially polarized light images frame by frame, wherein each frame image is sequentially illuminated by red, green and blue light sources to form a red, green and blue gray scale image, and a color image is synthesized by using an integration effect of human eyes; and transmits the image to the liquid crystal polarizer 308.
In one embodiment, the modulated image is converted into a linearly polarized image after passing through the liquid crystal polarizer 308, and the polarization direction is modulated into two mutually perpendicular polarized images according to different screens to be projected, and the liquid crystal polarizer 308 is controlled by the signal processor 307, so that the image is modulated into horizontal polarization or vertical polarization.
In one embodiment, the polarization splitting system is a PBS splitting prism.
In a specific embodiment, the modulated image passes through the PBS beam splitter 306, which splits the light with different polarization directions, thereby achieving the separation of the pictures; the split frames are projected through lens 311 onto screen 309, enabling dual field of view projection.
In one embodiment, different pictures of two screens are alternately imaged frame by frame, and the polarization modulation directions of the imaging chip LCD305 and the liquid crystal polarizer 308 are synchronously controlled by the signal processor 307, thereby realizing the separation of different pictures.
In a specific embodiment, the light source is a xenon light source, an LED light source, or a laser light source.
In a specific embodiment, the imaging chip is a DMD, LCOS or LCD.
In a specific embodiment, the polarization beam splitting system is a polarization beam splitting prism, a Glan prism or a Wollaston prism.
The invention provides a display system for realizing double-view field projection, and provides a scheme for realizing double-view field display by utilizing the existing mature technology and elements, and realizes simultaneous double-view field display of one optical machine.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (9)
1. A display system for implementing dual field of view projection, comprising:
the control module receives at least two paths of video signals and carries out frame-by-frame staggered mixing on the two paths of video signals to generate a mixed video signal;
the imaging system receives the mixed video signal and then generates mixed polarization image light, wherein the mixed polarization image light comprises linearly polarized light with various polarization directions which are staggered frame by frame;
and the polarization light splitting system is used for splitting the mixed polarization image light containing different polarization directions into a plurality of light paths with preset polarization directions.
2. The system of claim 1, wherein the imaging system comprises: a light source for emitting light;
an imaging chip for receiving the light and generating a mixed video image light according to the mixed video signal; and
and the modulation polarizer is used for modulating the mixed video image light into the mixed polarized image light according to the mixed video signal.
3. The system of claim 2, wherein the imaging system further comprises a shaping optical path for expanding, shimming, and/or decoherence of light exiting the light source.
4. The system of claim 3, wherein the shaped optical path comprises a lens, a reflective mirror, a light homogenizer, and/or a light guide.
5. The system of claim 2, wherein the light source is a xenon light source, an LED light source, or a laser light source.
6. The system of claim 2,
the imaging chip is DMD, LCOS or LCD.
7. The system of claim 2,
the modulating polarizer is a liquid crystal polarizer.
8. The system of claim 1, wherein the plurality of light paths are respectively provided with a lens for imaging the light passing through the polarization beam splitting system on a screen.
9. The system of claim 1, wherein the polarization beam splitting system is a polarization beam splitting prism, a glans prism, or a wollaston prism.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011393787.4A CN114594598A (en) | 2020-12-03 | 2020-12-03 | Display system for realizing double-view-field projection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011393787.4A CN114594598A (en) | 2020-12-03 | 2020-12-03 | Display system for realizing double-view-field projection |
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| CN114594598A true CN114594598A (en) | 2022-06-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023040662A1 (en) * | 2021-09-17 | 2023-03-23 | 华为技术有限公司 | Picture generation unit, related apparatus, and image projection method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01126678A (en) * | 1987-11-11 | 1989-05-18 | Hitachi Ltd | Six-plate liquid crystal projector |
| CN102421002A (en) * | 2011-11-21 | 2012-04-18 | 杨辉洲 | Method and system for realizing non-interference watching on multi-video contents |
| CN102798979A (en) * | 2012-08-15 | 2012-11-28 | 京东方科技集团股份有限公司 | 3D (three-dimensional) display device and glasses matched with same |
| CN104460196A (en) * | 2013-09-18 | 2015-03-25 | 光宝科技股份有限公司 | Projection module |
| CN109031677A (en) * | 2018-08-03 | 2018-12-18 | 联想(北京)有限公司 | Electronic equipment and its projecting method |
| CN109799616A (en) * | 2019-02-20 | 2019-05-24 | 成都理想境界科技有限公司 | A kind of projection display equipment |
-
2020
- 2020-12-03 CN CN202011393787.4A patent/CN114594598A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01126678A (en) * | 1987-11-11 | 1989-05-18 | Hitachi Ltd | Six-plate liquid crystal projector |
| CN102421002A (en) * | 2011-11-21 | 2012-04-18 | 杨辉洲 | Method and system for realizing non-interference watching on multi-video contents |
| CN102798979A (en) * | 2012-08-15 | 2012-11-28 | 京东方科技集团股份有限公司 | 3D (three-dimensional) display device and glasses matched with same |
| CN104460196A (en) * | 2013-09-18 | 2015-03-25 | 光宝科技股份有限公司 | Projection module |
| CN109031677A (en) * | 2018-08-03 | 2018-12-18 | 联想(北京)有限公司 | Electronic equipment and its projecting method |
| CN109799616A (en) * | 2019-02-20 | 2019-05-24 | 成都理想境界科技有限公司 | A kind of projection display equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023040662A1 (en) * | 2021-09-17 | 2023-03-23 | 华为技术有限公司 | Picture generation unit, related apparatus, and image projection method |
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