CN105045019B - Digital light projection (DLP) Polarized three-dimensional (3D) projection device - Google Patents

Digital light projection (DLP) Polarized three-dimensional (3D) projection device Download PDF

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Publication number
CN105045019B
CN105045019B CN201510532549.XA CN201510532549A CN105045019B CN 105045019 B CN105045019 B CN 105045019B CN 201510532549 A CN201510532549 A CN 201510532549A CN 105045019 B CN105045019 B CN 105045019B
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light
polarization
pixel
dlp
incident
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CN201510532549.XA
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CN105045019A (en
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王欢
刘洪力
李建春
陈昱
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Xuzhou Yichuang Photoelectric Technology Co ltd
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Nanjing Institute of Advanced Laser Technology
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Abstract

A digital light projection (DLP) polarized three-dimensional projection (3D) device comprises a white light source, a beam shaping system, digital micromirror device (DMD) chips, a projection lens, a light split/combination prism group and a driving signal control unit, wherein the light split/combination prism group is used for splitting white light emitted from a light source into red primary light, green primary light and blue primary light which are incident onto respective corresponding DMD chips for modulation; the top of each micro lens in the DMD chips is provided with a selective reflection surface for selective reflection of P light and S light, two sub pixels contained in a pixel are used for respectively giving out the P light and the S light, the P light and the S light which are reflected by the DMD chips corresponding to the three red, blue and green primary lights are modulated to form a left-eye image and a right-eye image by the driving signal control unit, and a looker can watch a 3D image by wearing adaptive polarized 3D glasses. Compared with the ordinary polarized 3D projection, the DLP polarized 3D device has the advantages of low cost and small volume, a projector is saved, and a good practical effect can be obtained in the occasion of no need of very high resolution.

Description

A kind of dlp polarization type stereo projection apparatus
Technical field
The present invention relates to projection display technique field, particularly one kind apply digital light processes (dlp, digital Light procession) shadow casting technique polarization type solid (3d) projection arrangement, cooperation polarization type 3d glasses may be viewed by 3d figure Picture.
Background technology
Polarization type 3d is the universal stereo display technique of current application, has the different principle in polarization direction to divide using light Solution original image, first pass through divide the image into vertical to polarised light and level to two groups of pictures of polarised light, then spectators wear a left side Right eyeglass is respectively adopted the 3d glasses of different polarization direction polaroid, and the right and left eyes of such people just can receive two groups of different pictures, Again through brain compound stereoscopic image.
Current non-family safe polarization type 3d Projection Display utilizes projector's p light to form left-eye image, using another An outer projector equipment forms eye image with s light, but so needs, using Liang Tai projector, to lead to cost more expensive.
Content of the invention
It is an object of the invention to overcoming above-mentioned the deficiencies in the prior art, provide a kind of the new of combination dlp shadow casting technique Polarization type stereo projection apparatus.
In order to solve above-mentioned technical problem, the technical scheme is that
A kind of dlp polarization type stereo projection apparatus, including light-source system, dmd chip, projection lens, closing light unit and drive Dynamic signaling control unit, described light-source system output is corresponded with each primary colours, respectively by the primary lights of color separated, dmd chip Primary lights are incident on corresponding dmd chip respectively;Each pixel of described dmd chip is become by two sub-pixel groups, respectively For the first polarization state sub-pixel and the second polarization state sub-pixel;Each sub-pixel is by can the micro-reflector of independent driving switch be hinged on Constitute on silicon substrate;Described micro-reflector top is selective reflecting face, and bottom is the hinge connecting silicon substrate;Described driving is believed Number control unit controls the micro-reflector in each sub-pixel to rotate to realize switch switching with hinge for axle;When being in opening When, incident primary lights are all reflected into the linear polarization with the first polarization direction by the micro-reflector of the first polarization state sub-pixel Light outgoing extremely described closing light unit, incident primary lights are all reflected into by the micro-reflector of the second polarization state sub-pixel to be had The linearly polarized light of the second polarization direction outgoing extremely described closing light unit, wherein said first polarization direction and the second polarization direction It is mutually perpendicular to;Drive signal control unit controls the micro-reflector in each dmd chip according to display image information to incident base Coloured light is modulated, and the primary lights of modulated reflection are combined into a branch of modulation light by closing light unit, have the first polarization in modulation light The light in direction constitutes left-eye image, and the light with the second polarization direction constitutes left-eye image;Modulation light passes through projection lens It is incident upon on screen.
Preferably, described screen is metal screen, and incident modulation polarization degree thereon can be made not to be destroyed.
Preferably, described light-source system exports three primary colours light, respectively ruddiness, green glow and blue light, corresponds to ruddiness dmd respectively Chip, green glow dmd chip and blue light dmd chip, now this projection arrangement is three dmd systems.
It is further preferred that described light-source system includes white light source, beam shaping system and spectrophotometric unit, described white light The white light of light source outgoing incident spectrophotometric unit after beam shaping system, incident white light is divided into red by described spectrophotometric unit Light, green glow and blue light respectively outgoing are to corresponding dmd chip.
Still more preferably, the white light of described white light source outgoing is nature polarised light or circularly polarized light, contains many Kind coloured light, and can be analyzed to the linearly polarized light of multiple polarization directions, the wide usage of this light source is wider.
Still more preferably, described spectrophotometric unit and closing light unit are the separation/combination prism group unified, special with one group Setting shape realizes the function of light splitting and closing light with the prism combining simultaneously, makes device compacter.
Preferred for such scheme, described light-source system also includes speculum, the white light warp of beam shaping system exit Described speculum reflects into described separation/combination prism group.
Preferably, the plane of incidence of described each primary lights is all parallel, the first polarization state sub-pixel for above-mentioned all technical schemes Interior selective reflecting face reflection p light, the selective reflecting face reflection s light in the second polarization state sub-pixel;All p in modulation light Light constitutes left-eye image, and all s light constitute eye image.
Technical solution of the present invention each micromirror top in its core component dmd chip is provided with to p light and the choosing of s light Select the selective reflecting face of sexual reflex, two sub-pixels difference only outgoing p light and s light that one pixel of dmd chip comprises, and logical Overdriving, the p light of dmd chip reflection corresponding to red-green-blue light and s light modulation form left eye to signaling control unit respectively Image and eye image, beholder wears the polarization type 3d glasses that left and right eyeglass only allows p light and s light transmission respectively, you can by Images of left and right eyes receives left-eye image and eye image respectively, thus forming stereo-picture.
Because common polarization type 3d projection needs respectively to configure a projector for polarizing orthogonal p light and s light, and this Inventive technique scheme can save a projector, and therefore the present invention has the advantages that low cost, small volume although due to employing The design of many sub-pixels makes resolution ratio decrease, but can obtain practical effect well under the occasion without very high resolution Really.
Brief description
Fig. 1 is dlp polarization type stereo projection apparatus structural representation of the present invention;
Fig. 2 is dmd chip pixel structural representation;
Fig. 3 is dmd chip sub-pixel micro-mirror structure schematic diagram.
Wherein:
1-1: white light source;1-2: beam shaping system;1-3: speculum;2:dmd chip;2r: ruddiness dmd chip;2g: Green glow dmd chip;2b: blue light dmd chip;P: pixel;P1: the first polarization state sub-pixel;P2: the second polarization state sub-pixel;M: Micro-reflector;M1: selective reflecting face;M2: hinge;B: silicon substrate;3: separation/combination prism group;4: projection lens;L1: light Source light;L2: modulation light;L21:p light;L22:s light.
Specific embodiment
The present invention will be further described to pass through embodiment below in conjunction with accompanying drawing, to more fully understand the present invention.
Fig. 1 show the present embodiment the dlp stereo projecting equipment corresponding to three dmd structures.Wherein, white light source 1- Light source light l1 of 1 outgoing is white light, and it is nature polarised light or circularly polarized light;Light source light l1 is through beam shaping system 1-2 Incide separation/combination prism group 3 by a speculum 1-3, white light is divided into ruddiness, green glow and blue light, incides respectively Ruddiness dmd chip 2r, green glow dmd chip 2g and blue light dmd chip 2b, the three coloured light plane of incidence is mutually parallel;Wherein, dmd core The structure of piece is as follows:
It is the micro-reflector m structure in the basic structure of dmd chip 2 of the present embodiment and pixel p shown in Fig. 2 and Fig. 3.As Fig. 2, dmd chip 2 is formed by pixel p is regularly arranged, comprises two sub-pixels, the respectively first polarization state in each pixel p Pixel p 1 and the second polarization state sub-pixel p2;As Fig. 3, two sub-pixels are hinged on by the hinge m2 of bottom by micro-reflector m Constitute on silicon substrate b, described micro-reflector m top is selective reflecting face m1, the selectivity in the first polarization state sub-pixel p1 Reflecting surface only reflects p light, and s light is only reflected in the selective reflecting face in the second polarization state sub-pixel p2;
The micro-reflector m that described drive signal control unit (not shown) can control in each sub-pixel with hinge m2 is Axle rotates to different angles to realize switch switching;As shown in figure 3, at micro-reflector m belonging to the first polarization state sub-pixel p1 In opening angle, incident light source light l1 chosen sexual reflex face m1 is reflected into p light l21, and emergent light injects separation/combination prism Group 3 is incorporated into modulation light l2;And the micro-reflector m belonging to the second polarization state sub-pixel p2 is in closing angle, the light source of incidence Light l1 chosen sexual reflex face m1 is reflected into s light l22, but this reflection s light is not incorporated into modulation light l2, but quilt in projection arrangement Absorb.
As shown in figure 1, drive signal control unit (not shown), according to the stereo-picture intending display, image is divided into Left-eye image and eye image are simultaneously processed as the switching signal of micro-reflector, and drive signal control unit controls the first polarization state Pixel p 1 execution left-eye image display signal, and the second polarization state sub-pixel p2 execution eye image display signal, each dmd chip Interior micro-reflector m carries out switch motion thus being modulated respectively to incident three primary colours light according to display signal, after modulation Primary lights be reflected back separation/combination prism group 3 and be combined into a branch of modulation light l2;In modulation light l2, from all first polarizations The p light of state sub-pixel p1 contains the display picture information of left-eye image, from the s light bag of all second polarization state sub-pixel p2 Contain the display picture information of eye image, modulation light l2 projects on the screen of display by projection lens 4, and screen adopts Metal screen;Through screen reflection, beholder just can see left-and right-eye images synthesis by wearing suitable polarization type 3d glasses Stereo-picture.
It should be understood that above-described embodiment only technology design to illustrate the invention and feature, its object is to for this area skill Art personnel understand present disclosure and implement according to this, the not exhaustion of specific embodiment, can not limit the present invention with this Protection domain.All technical schemes according to invention of the present invention are modified or equivalent, without deviating from the technology of the present invention The objective of scheme and scope, it all should be covered in the middle of scope of the presently claimed invention.

Claims (8)

1. a kind of dlp polarization type stereo projection apparatus, including light-source system, dmd chip, projection lens (4), closing light unit and drive Dynamic signaling control unit it is characterised in that:
Described light-source system output is corresponded with each primary colours by the primary lights of color separated, dmd chip, and each primary lights enter respectively It is incident upon on corresponding dmd chip;
Each pixel (p) of described dmd chip is become by two sub-pixel groups, the respectively first polarization state sub-pixel (p1) and Two polarization state sub-pixels (p2);Each sub-pixel is by the micro-reflector (m) of independent driving switch being hinged on the upper structure of silicon substrate (b) Become;Described micro-reflector (m) top is selective reflecting face (m1), and bottom is the hinge (m2) connecting silicon substrate (b);
Described drive signal control unit controls the micro-reflector (m) in each sub-pixel to rotate to realize out with hinge (m2) for axle Close switching;When being in opening, the selective reflecting face (m1) of the interior micro-reflector (m) of the first polarization state sub-pixel (p1) will Incident primary lights are all reflected into the linearly polarized light with the first polarization direction and outgoing is to described closing light unit, the second polarization Incident primary lights are all reflected into the linearly polarized light with the second polarization direction simultaneously by the micro-reflector (m) of state sub-pixel (p2) To described closing light unit, wherein said first polarization direction and the second polarization direction are mutually perpendicular to for outgoing;Drive signal controls single Unit controls the micro-reflector (m) in each dmd chip according to display image information, incident primary lights to be modulated, closing light unit The primary lights of modulated reflection are combined into a branch of modulation light, the light in modulation light with the first polarization direction constitutes left eye figure Picture, the light with the second polarization direction constitutes left-eye image;
Modulation light is incident upon on screen by projection lens (4).
2. dlp polarization type stereo projection apparatus according to claim 1 it is characterised in that: described screen be metal screen.
3. dlp polarization type stereo projection apparatus according to claim 1 it is characterised in that: described light-source system output three Primary lights, respectively ruddiness, green glow and blue light, correspond to ruddiness dmd chip (2r), green glow dmd chip (2g) and blue light dmd respectively Chip (2b).
4. dlp polarization type stereo projection apparatus according to claim 3 it is characterised in that: described light-source system includes white Radiant (1-1), beam shaping system (1-2) and spectrophotometric unit, the white light of described white light source (1-1) outgoing is whole through light beam Shape system (1-2) incident spectrophotometric unit afterwards, incident white light is divided into ruddiness, green glow and blue light and goes out respectively by described spectrophotometric unit It is incident upon on corresponding dmd chip.
5. dlp polarization type stereo projection apparatus according to claim 4 it is characterised in that: described white light source (1-1) goes out The white light penetrated is nature polarised light or circularly polarized light.
6. dlp polarization type stereo projection apparatus according to claim 4 it is characterised in that: described spectrophotometric unit and closing light Unit is the separation/combination prism group (3) of unification.
7. dlp polarization type stereo projection apparatus according to claim 6 it is characterised in that: described light-source system also includes Speculum (1-3), the white light of beam shaping system (1-2) outgoing reflects into described separation/combination rib through described speculum (1-3) Microscope group (3).
8. the dlp polarization type stereo projection apparatus according to any one of claim 1 to 7 it is characterised in that: described each primary colours The plane of incidence of light is all parallel, the selective reflecting face reflection p light in the first polarization state sub-pixel (p1), the sub- picture of the second polarization state Selective reflecting face reflection s light in plain (p2);In modulation light, all p light constitute left-eye image, and all s light constitute right eye figure Picture.
CN201510532549.XA 2015-08-26 2015-08-26 Digital light projection (DLP) Polarized three-dimensional (3D) projection device Expired - Fee Related CN105045019B (en)

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CN107884934B (en) * 2017-11-10 2022-05-31 联想(北京)有限公司 Head-mounted display device and control method thereof
CN109917607A (en) * 2017-12-13 2019-06-21 讯飞幻境(北京)科技有限公司 3D projection
CN113568267A (en) * 2020-04-28 2021-10-29 怡利电子工业股份有限公司 Projection device for projecting stereo image

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FI20030583A (en) * 2003-04-16 2004-10-17 Upstream Engineering Oy Beamer
CN100345058C (en) * 2005-04-18 2007-10-24 东华大学 Mono-chip single-colour wheel stereo projection optical engine
CN101408678B (en) * 2007-10-11 2010-12-08 鸿富锦精密工业(深圳)有限公司 Stereo projection optical system
CN102591029A (en) * 2011-04-26 2012-07-18 浙江亿思达显示科技有限公司 3D projection optical system and dual chip light splitting and light integrating model thereof
JP6566872B2 (en) * 2013-03-14 2019-08-28 ストラタシス リミテッド High-resolution DLP projector device and method of using the same
CN204989730U (en) * 2015-08-26 2016-01-20 南京先进激光技术研究院 Three -dimensional projection arrangement of DLP polarisation formula

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