CN1232976A - High-brightness stereo projection technology - Google Patents
High-brightness stereo projection technology Download PDFInfo
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- CN1232976A CN1232976A CN 98101615 CN98101615A CN1232976A CN 1232976 A CN1232976 A CN 1232976A CN 98101615 CN98101615 CN 98101615 CN 98101615 A CN98101615 A CN 98101615A CN 1232976 A CN1232976 A CN 1232976A
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- 239000002184 metal Substances 0.000 claims abstract description 12
- 230000010287 polarization Effects 0.000 claims description 63
- 230000005684 electric field Effects 0.000 claims description 38
- 230000010363 phase shift Effects 0.000 claims description 35
- 230000003287 optical effect Effects 0.000 claims description 18
- 239000013078 crystal Substances 0.000 claims description 15
- 230000000007 visual effect Effects 0.000 claims description 5
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 17
- 239000013598 vector Substances 0.000 description 14
- 230000014509 gene expression Effects 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 238000006722 reduction reaction Methods 0.000 description 4
- 210000004556 brain Anatomy 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 210000002858 crystal cell Anatomy 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000005388 cross polarization Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007540 photo-reduction reaction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
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Abstract
Two sets of liquid crystal projector with linear polarizing function are used to project stereo image, one quarter-wave phase shifter is set before the lens of one projector, and one three-quarter-wave phase shifter before the lens of the other projector, so that the linear polarized light projected by the two projectors forms right-handed and left-handed polarized light to be projected onto metal screen. Through one quartz-wave phase shifter before the left eye and one three-quarter-wave phase shifter before the right eye and one pair of orthogonal polarizing laser sheets, the viewer can watch high-brightness stereo image.
Description
Stereo projection technology in the past often adopts cathode-ray tube (CRT) as projector equipment, in order to show the image of two eyes, general method is to adopt two three rifle projector positioned vertical one on the other, or about side by side horizontal setting, linear polarizing filter sheet is placed in each projection lens the place ahead at every projector, and the light quadrature that allows two projector projects go out rises partially, the stereoscopic image of this cross polarization projects on the metal screen with good conducting function, observer's the visual field be gone out and be entered to this screen can with the anti-phase 180 degree back reflections of throw light, and the observer wears quadrature analyzing optical filtering and watches the stereoprojection image.The brightness of this stereo projection technology is subjected to the influence of the polarizing filter sheet in projector the place ahead, in the available brightness of former projector, reduced about brightness more than 60%, this becomes the major defect of this binocular projector, because it can only use in a desirable dark situation, when ambient light brighter, or when wishing in by day the indoor environment Projection Display stereoscopic image, then its brightness that can provide almost can't meet the demands at all.
The present invention proposes a kind of realization high-brightness stereo projection technique for displaying, utilize this stereo projection technology can realize the stereo projection display of indoor environment on daytime, also can satisfy in high-brightness environment the requirement of using the stereo projection display stereoscopic image, as in the very bright monster fair of light, use the stereo projection display stereoscopic image or in the very bright public place of entertainment of light, academic exchange place, simulated training demonstration place use the stereo projection display stereoscopic image.
Principal character of the present invention is: adopt two liquid crystal projecting projection stereoscopic images, two liquid crystal projectings are positioned vertical one on the other, also can about side by side horizontal setting, the crystal projection element of this liquid crystal projection apparatus must be the linear inclined to one side liquid crystal cell that rises, the built-in light source of liquid crystal projection apparatus will be converted to linearly polarized photon behind this liquid crystal cell, the linearity of the stereoscopic image that two projector projects go out plays folk prescription to being duplicate, also can be not exclusively the same.The place ahead at the projection lens of a projector, settle a slice has one of four parts wavelength phase shift function to electric field component (or magnetic field) component phase plate, make electric field component in the light that this projector projects goes out or magnetic-field component by the length of one of four parts of this phase plate phase shifts wavelength; Projection lens the place ahead at the another projector, settle a slice has four parts three-wavelength phase shift function to electric field component or magnetic-field component phase plate, make electric field component (or magnetic field) component in the light that this projector projects goes out by the length of three wavelength of four parts of this phase plate phase shifts, the linearly polarized photon that such two projector projects go out has just formed rotatory polarization light, what one of them projector projects went out is left-hand polarization light, is right-handed polarized light and another projector projects goes out.Owing to just linearly polarized photon is converted to rotatory polarization light,, has still kept the projection brightness of former projector therefore without any light losing.This two-way rotatory polarization light projects on the metal curtain with good conducting function, and by this metal curtain with anti-phase 180 the degree modes reflect away, spectators watch this stereoscopic image by a kind of special eyes, these glasses are at first with the electric field in the light that receives (or magnetic field) phase shift four/three-wavelength, make it be reduced to original linearly polarized photon, detect by two linear checking bias slices again, make left eye can only see the image that left projector projects goes out, and right eye can only be seen the image that right projector projects goes out, and forms stereoscopic image at last.
Below in conjunction with accompanying drawing the present invention is described in more detail.
Fig. 1 is a ultimate principle figure of the present invention.7,8,9, the light that sends of red (R), green (G) in the expression liquid crystal projection apparatus, blue (B) three kinds of light sources, three crystal projection unit of 2 expressions, they show the matrix image of red (R), green (G), blue (B) in the mode of matrix, the 4th, the image synthesis unit, it can synthesize a full-color image with the matrix image of separate red (R), green (G), blue (B), and throws away by camera lens 5.Three kinds of light sources of red (R), green (G), blue (B) do not have fixing polarization direction, and the direction of vibration of its light is from all directions, but through behind the crystal projection unit 2, output light becomes linearly polarized photon 3.Image driving signal 6 drives crystal projection unit 2, so that the crystal projection unit can the output matrix image.What will pay special attention to here is: the image of crystal projection unit output must be linearly to rise partially, and one non-linear inclined to one side crystal projection unit or other flat panel display unit can not be used for the present invention.
13 and 14 is two above-mentioned liquid crystal projection apparatus, and they can positioned vertical, also can horizontal setting.The images of 15 and 16 explanations, 13 and 14 outputs are linear to rise partially, and it plays folk prescription to being any direction.11 and 10 is time division type stereoscopic image playing devices, they are with time division type stereo video signals or Computerized 3 D picture intelligence input computer image processing system 12,12 will react the left eye image separates with even field by odd field with the vision signal of eye image, form separate, synchronous left eye vision signal 25 and right eye vision signal 26, import liquid crystal projection apparatus 13 and 14 then.The place ahead of the camera lens 15 of liquid crystal projection apparatus has installed quarter-wave phase shifter 17 additional, the place ahead of the camera lens 16 of liquid crystal projection apparatus has installed four/three-wavelength phase shifter 18 additional, they play visual partially 15 with the linearity of liquid crystal projection apparatus 13 output and are converted to clockwise right-handed polarized light 28, and just the linearity of liquid crystal projection apparatus 14 outputs plays visual partially 16 and is converted to counterclockwise left-hand polarization light 29.This rotatory polarization light stereoscopic image is projected on the metal curtain 20 with good conducting function, and 20 go back the rotatory polarization direction paraphase 180 degree back reflections of projected image, enter the observer visual field.Obviously, the left-hand polarization light that is reflected back has become right-handed polarized light, and the right-handed polarized light that is reflected back has become left-hand polarization light.Spectators wear rotatory polarization light filter goggle 23 and watch the stereoprojection image, it before the left eye optical filter 21 that can only allow right-handed polarized light pass through, and be the optical filter 22 that can only allow left-hand polarization light pass through before the right eye, left eye can only receive right-handed polarized light 31 (being the left-eye image that left projector projects goes out), and right eye can only receive left-hand polarization light (being the eye image that right projector projects goes out) 30, forms stereoscopic image 27 through observer's brain at last.
Fig. 2 has illustrated the ultimate principle that forms left-hand polarization light and right-handed polarized light.15 and 16 is camera lenses of two liquid crystal projection apparatus, the image that projects through it is a linearly polarized photon, linearly polarized photon is made up of alternating electric field 41 and alternating magnetic field 34 quadratures, the field vector of 43 expression alternating electric fields, the field vector of 35 expression alternating magnetic fields, their phase place is identical, and these two synchronous field vectors have synthesized the field vector 37 of linear oscillator, the essential characteristic of Here it is linearly polarized photon (or being called the linear polarization electromagnetic field).One of front arrangement 15 can be with the quarter-wave phase shifter 17 of electric field component 41 phase shifts, the phase invariant in magnetic field 45 like this, and the quarter-wave that the phase place of electric field 41 is delayed time backward forms by the electric field component 46 of phase shift and electric field intensity 48, therefore the field vector 58 of alternating magnetic field and the field vector 48 of alternating electric field have synthesized rotating vector 28, this rotating vector 28 is rotated counterclockwise in the face of the observer, and we are called left-hand polarization light.One of front arrangement 16 can be with the electric field phase shifter 18 of electric field 41 phase shifts four/three-wavelength, the phase invariant in magnetic field 59 like this, and the phase place of electric field 41 has been delayed time the formation of four/three-wavelength backward by the electric field component 50 of phase shift and electric field intensity 56, therefore the field vector 51 of alternating magnetic field and the field vector 56 of alternating electric field have synthesized rotating vector 29, this rotating vector 29 turns clockwise in the face of the observer, and we are called right-handed polarized light.Like this, if apparatus has the linear liquid crystal projection apparatus 15 projection left-eye image that play effect partially, 16 projection eye image, and the phase shifter 18 by one of four parts wavelength phase-shifters 17 and four/three-wavelength is respectively with the phase place phase shift of its electric field component (or magnetic-field component), then can form the left-hand polarization of left eye image, the dextropolarization of right eye image, and not loss of the light that projects, because phase shifter does not lose light intensity.The left-hand polarization light and the right-handed polarized light that form with such method have extremely strong luminance brightness, and be basic identical in the luminance brightness of former liquid crystal projector, use two projector projects left eye images and eye image respectively, so the brightness of stereoscopic image will double in addition.
Said method also can adopt one magnetic field is had phase shifter that the phase shifter of quarter-wave phase shift function and another have four/three-wavelength phase shift function to magnetic field respectively the left-eye image of linear polarization and the alternating magnetic field component in the eye image to be carried out quarter-wave phase shift and the phase shift of four/three-wavelength respectively and realize left-hand polarization light and right-handed polarized light.
Fig. 3 has illustrated that this rotatory polarization light must project on the metal screen with good conductive characteristic, to form the anti-phase reflection rotatory polarization light of 180 degree, has illustrated also how spectators see the stereoprojection image simultaneously.The 15th, the camera lens of left projector, the 61st, the linear polarization image of left projector projects, the 17th, can be with the quarter-wave phase shifter of electric field component (or magnetic-field component) phase shift, this phase shifter is transparent, therefore light is not formed decay, 61 become left- hand polarization light 28,28 afterwards through 17 projects on the metal screen 60 with good conductive function, 60 will throw the electromagnetic wave 28 paraphase 180 degree back reflections that come goes back, and forms right-handed polarized light 65.The 16th, the camera lens of right projector, the 62nd, the linear polarization image of right projector projects, the 18th, can be with the phase shifter of electric field component (or magnetic-field component) phase shift four/three-wavelength, this phase shifter also is transparent, therefore also light is not formed decay, 62 become right-handed polarized light 29,29 afterwards through 18 projects on the metal screen 60 with good conductive function, 60 will throw the electromagnetic wave 29 paraphase 180 degree back reflections that come goes back, and forms left-hand polarization light 66.It should be noted to refer to all that at this " left-hand polarization light " of referring to and " right-handed polarized light " observer faces the electromagnetic wave propagation direction, resultant vector clockwise turns to right-handed polarized light, and resultant vector is rotated counterclockwise and is left-hand polarization light.70 and the 71 rotatory polarization analyzers of wearing for spectators, 70 allow right-handed polarized lights to pass through, do not allow left-hand polarization light to pass through; 71 allow left-hand polarization light to pass through, do not allow right-handed polarized light to pass through, therefore spectators' left eye can be observed left eye stereoprojection image 68 by this glasses, and right eye can be observed right eye stereoprojection image 69 by this glasses, finally synthesizes stereoscopic image 63 through brain.
When observing the stereoprojection image that reflects by metal screen 60 by eyeglass 70 and 71, existing left-hand polarization light also has right-handed polarized light, be that right-handed polarized light 65 and left-hand polarization light 66 are to arrive eyeglass before left eye and the right eye simultaneously, can only see right-handed polarized light 65 in order to guarantee left eye, and right eye can only be seen left-hand polarization light 66, must be linearly polarized photon at first just with the rotatory polarization photo-reduction, in order to realize this purpose, should adopt the ophthalmic lens that constitutes by special material, a kind of is can be with the quarter-wave phase-shifter 80 of electric field (or magnetic field) phase shift, another kind is can be with the phase-shifter 81 of electric field (or magnetic field) phase shift four/three-wavelength, in 80 and 81 back, should be provided with respectively can the quadrature analyzing linear polarization optical filter 82 and 83.If 80 receive right-handed polarized light 65, after then electric field (or magnetic field) being carried out the quarter-wave phase shift through 80, former linearly polarized photon promptly is reduced, its linear polarization direction of light after the reduction is shown in 91, because 91 is consistent with 82 polarization direction, so left eye has been seen the image 95 that left projector projects goes out.If 80 receive left-hand polarization light 65 then after through 80 electric field (or magnetic field) being carried out the quarter-wave phase shift, rotatory polarization light is reduced to linearly polarized photon, but the direction of vibration of the linearly polarized photon after the reduction is 93, it is with the analyzing direction of analyzing optical filter 82 quadrature just in time, so left eye can't be seen the image that has projector projects to go out.If 81 receive left-hand polarization light 66, after then electric field (or magnetic field) being carried out the phase shift of four/three-wavelength through 81, former line is given birth to polarized light and promptly is reduced, linear polarization direction after the reduction is shown in 94, because 94 is consistent with 83 polarization direction, therefore right eye can be seen the image 96 that right projector projects goes out, if 81 receive right-handed polarized light 65, after then electric field (or magnetic field) being carried out the phase shift of four/three-wavelength through 81, rotatory polarization light is reduced to linearly polarized photon, but the direction of vibration of linearly polarized photon after the reduction is 92, and it is with the analyzing direction of analyzing optical filter 83 quadrature just in time, so right eye can't be seen the image that left projector projects goes out.Left eye 89 receives the image 95 of left projector projects, and right eye 90 receives the image 96 of right projector projects, has therefore synthesized stereoscopic image 63 in brain.
The stereo projection technology of this high brightness can be used for projection time division type stereoscopic image, the synchronous stereoscopic image of two-way and computing machine and generate the unit stereoscopic image, because it does not lose the brightness of former projector substantially, has therefore greatly expanded its application.It plays the characteristic that inclined to one side feature causes that linearly polarized photon changes rotatory polarization light into after with electric field component in the electromagnetic field or magnetic-field component phase shift and combines the color image in the crystal projection unit is linear, has reached the purpose that realizes high-brightness stereo projection.
Claims (6)
1. the present invention relates to a kind of high-brightness stereo projection technology, its essential characteristic is: this high-brightness stereo projection technology is made up of several sections once: two parallel or vertically place and can play inclined to one side crystal projection unit to projection image is linear, before two camera lenses that are placed on above-mentioned two crystal projection unit and can play the phase-shifter that the electric field component (or magnetic-field component) in the inclined to one side image carries out quarter-wave and the phase shift of four/three-wavelength to this linearity respectively, metal screen with good conductive function, a kind of left eyeglass lens that the quarter-wave phase shifter of electric field component in the light (or magnetic-field component) phase shift and linear polarization optical filter can be made, a kind of right eye eyeglass that the phase shifter and the linear polarization optical filter of the electric field component in the light (or magnetic-field component) phase shift four/three-wavelength can be made, or a kind of right eye eyeglass that the quarter-wave phase shifter of electric field component in the light (or magnetic-field component) phase shift and linear polarization optical filter can be made, a kind of left eyeglass lens that the phase shifter and the linear polarization optical filter of the electric field component in the light (or magnetic-field component) phase shift four/three-wavelength are made can the composition.
2. " two parallel or vertically place and can play inclined to one side crystal projection unit " described in the claim 1 to projection image is linear, its essential characteristic is: projector projects left-eye image wherein, and another projector projects eye image, the image that each projector projects goes out all is a linear polarization.
3. " before two camera lenses that are placed on above-mentioned two crystal projection unit and can play the phase-shifter that the electric field component (or magnetic-field component) in the inclined to one side image carries out quarter-wave and the phase shift of four/three-wavelength to this linearity respectively " described in the claim 1, its essential characteristic is: before the phase-shifter with quarter-wave phase shift function in this phase-shifter being placed on the camera lens of an above-mentioned crystal projection unit, its linearly polarized photon can be converted to left-hand polarization light, and before the phase-shifter with four/three-wavelength phase shift function in this phase-shifter being placed on the camera lens of an above-mentioned crystal projection unit, its linearly polarized photon can be converted to right-handed polarized light, just projection image is converted to rotatory polarization light by linearly polarized photon after placing phase-shifter, does not lose visual original brightness.
4. " the metal screen with good conductive function " described in the claim 1, its essential characteristic is: the anti-phase 180 degree back reflections of the rotatory polarization image that this metal curtain can come the projection of above-mentioned two crystal projection unit be gone out.
5. " a kind of left eyeglass lens that the quarter-wave phase shifter of electric field component in the light (or magnetic-field component) phase shift and linear polarization optical filter can be made; a kind of right eye eyeglass that the phase shifter and the linear polarization optical filter of the electric field component in the light (or magnetic-field component) phase shift four/three-wavelength can be made " described in the claim 1, its essential characteristic is: this eyeglass is settled the linear polarization optical filter near left eye one side, opposite side is settled the quarter-wave phase-shifter, this eyeglass is settled the linear polarization optical filter near right eye one side, opposite side is settled four/three-wavelength phase-shifter, and the polarization characteristic of the polarizing filter before the right and left eyes must quadrature.
6. " a kind of right eye eyeglass that the quarter-wave phase shifter of electric field component in the light (or magnetic-field component) phase shift and linear polarization optical filter can be made; a kind of left eyeglass lens that the phase shifter and the linear polarization optical filter of the electric field component in the light (or magnetic-field component) phase shift four/three-wavelength can be made " described in the claim 1, its essential characteristic is: this eyeglass is settled the linear polarization optical filter near left eye one side, opposite side is settled four/three-wavelength phase-shifter, this eyeglass is settled the linear polarization optical filter near right eye one side, opposite side is settled the quarter-wave phase-shifter, and the polarization characteristic of the polarizing filter before the right and left eyes must quadrature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB981016154A CN1139834C (en) | 1998-04-22 | 1998-04-22 | High-brightness stereo projection technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB981016154A CN1139834C (en) | 1998-04-22 | 1998-04-22 | High-brightness stereo projection technology |
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| Publication Number | Publication Date |
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| CN1232976A true CN1232976A (en) | 1999-10-27 |
| CN1139834C CN1139834C (en) | 2004-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB981016154A Expired - Lifetime CN1139834C (en) | 1998-04-22 | 1998-04-22 | High-brightness stereo projection technology |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408675B (en) * | 2007-10-09 | 2010-06-09 | 鸿富锦精密工业（深圳）有限公司 | Stereo projection optical system |
| CN101943799A (en) * | 2010-07-16 | 2011-01-12 | 黄凤仙 | Polarization-type three-dimensional double-projection optical system |
| CN102591028A (en) * | 2011-03-23 | 2012-07-18 | 深圳市亿思达显示科技有限公司 | Projector and stereoscopic image system |
| WO2012129950A1 (en) * | 2011-03-30 | 2012-10-04 | 深圳市亿思达显示科技有限公司 | Projector and stereo image system |
| CN101946522B (en) * | 2008-02-25 | 2013-06-26 | 柯达公司 | Stereo projection using polarized solid state light sources |
-
1998
- 1998-04-22 CN CNB981016154A patent/CN1139834C/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408675B (en) * | 2007-10-09 | 2010-06-09 | 鸿富锦精密工业（深圳）有限公司 | Stereo projection optical system |
| CN101946522B (en) * | 2008-02-25 | 2013-06-26 | 柯达公司 | Stereo projection using polarized solid state light sources |
| CN101943799A (en) * | 2010-07-16 | 2011-01-12 | 黄凤仙 | Polarization-type three-dimensional double-projection optical system |
| CN102591028A (en) * | 2011-03-23 | 2012-07-18 | 深圳市亿思达显示科技有限公司 | Projector and stereoscopic image system |
| WO2012129950A1 (en) * | 2011-03-30 | 2012-10-04 | 深圳市亿思达显示科技有限公司 | Projector and stereo image system |
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| Publication number | Publication date |
|---|---|
| CN1139834C (en) | 2004-02-25 |
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Assignee: Zhejiang Tianlu Photoelectric Co., Ltd. Assignor: Hongkong Chuangtu Development Co., Ltd. Contract record no.: 2011990000068 Denomination of invention: High-brightness stereo projection technology Granted publication date: 20040225 License type: Exclusive License Open date: 19991027 Record date: 20110127 |
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