CN1139834C - High-brightness stereo projection technology - Google Patents
High-brightness stereo projection technology Download PDFInfo
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- CN1139834C CN1139834C CNB981016154A CN98101615A CN1139834C CN 1139834 C CN1139834 C CN 1139834C CN B981016154 A CNB981016154 A CN B981016154A CN 98101615 A CN98101615 A CN 98101615A CN 1139834 C CN1139834 C CN 1139834C
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- 238000005516 engineering process Methods 0.000 title description 5
- 230000010287 polarization Effects 0.000 claims abstract description 61
- 239000002184 metal Substances 0.000 claims abstract description 12
- 239000013078 crystal Substances 0.000 claims description 31
- 230000005684 electric field Effects 0.000 claims description 30
- 230000010363 phase shift Effects 0.000 claims description 30
- 230000003287 optical effect Effects 0.000 claims description 18
- 239000011521 glass Substances 0.000 claims description 6
- 230000000007 visual effect Effects 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 2
- 239000013598 vector Substances 0.000 description 14
- 230000015572 biosynthetic process Effects 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 5
- 238000007540 photo-reduction reaction Methods 0.000 description 4
- 238000006722 reduction reaction Methods 0.000 description 4
- 210000004556 brain Anatomy 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 238000005388 cross polarization Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 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
- 239000000463 material Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
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- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
The present invention relates to a high brightness stereo projection technique. In the present invention, two liquid crystal projection devices with a linear polarizing function are used for projecting stereo images; a quarter wavelength phase shifter is arranged in front of a lens of a projector, and a three quarter wavelength phase shifter is arranged in front of the other projector for causing linear polarized light projected by the two projectors to form left rotatory polarization light and right rotatory polarized light; the two paths of rotatory polarized light are projected on a metal screen; viewers view high brightness stereo images by the quarter wavelength phase shifter and the three quarter wavelength phase shifter which are respectively arranged in front of the left eye and the right eye, and a pair of orthogonal polarization laser pieces.
Description
One. technical field: the invention belongs to the telecommunication technology class.It is specifically related to a kind of product structure that can show stereo projection system.
Two. background technology: stereo projection technology before often adopts cathode-ray tube (CRT) as projector equipment, in order to show two images that eyes are different, general method is to adopt two three rifle projector positioned vertical one on the other, or left and right horizontal is settled side by side, 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 ° of 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 projector the place ahead polarizing filter sheet, in the available brightness of former projector, reduced about brightness more than 60%, it becomes the major defect of this binocular projector, because it can only use in desirable dark situation, brighter or when wishing in by day the indoor environment Projection Display stereoscopic image when ambient light, then its brightness that can provide almost can't meet the demands at all.
Three. summary of the invention: the objective of the invention is can not in brighter environment, show special this programme---a kind of stereo projection system that proposes of stereoscopic views inadequately for solving aforesaid brightness, it has the characteristics of high brightness, utilize this optical projection system can realize showing under the indoor environment on daytime the stereoscopic image projection, also can satisfy in high-brightness environment the requirement that shows stereoscopic image, as in the very bright monster fair of light, using this system to show stereoscopic image, or in the very bright public place of entertainment of light, the academic exchange place, native system Projection Display stereoscopic image is used in simulated training demonstration place.
By as above design, body optical projection system provided by the present invention, it is characterized in that this optical projection system is made up of two crystal projection unit, two phase shifters, the metal screen with good conductive function and glasses, its two projecting cells are parallel or vertical placement, launch two kinds of images that right and left eyes should be seen respectively, and can do linear rising partially projection image; Its phase shifter is before being placed on two crystal projection unit camera lenses, can be respectively linearity be played the phase shift that electric field component in the inclined to one side image or magnetic-field component carry out 1/4 wavelength and 3/4 wavelength and forms the rotatory polarization image; Throw away behind anti-phase 180 ° of the rotatory polarization image that its metal screen can come the projection of two crystal projection unit; The eyeglass of its glasses is by can with the electric field component in the light or magnetic-field component is carried out the phase shifter of 1/4 wavelength or 3/4 wavelength phase shift and the linear optical filter of analyzing constitutes, and the phase shifter of right and left eyes eyeglass and the direction of linear optical filter and numerical value should and linearly play an inclined to one side parameter and adapt with the phase shifter of right and left eyes image projection unit.
In this programme, its two are parallel or vertically place and can be to linear one of them projecting cell projection left eye image of inclined to one side crystal projection unit that rises of projection image, and another projecting cell projection right eye image, the image that each projecting cell projects all is a linear polarization.Its two are placed on before two projecting cell camera lenses and can be respectively this linearity be played the phase shifter that electric field component in the inclined to one side image or magnetic-field component are carried out 1/4 wavelength and 3/4 wavelength phase shift, before the phase shifter that has 1/4 wavelength phase shift function in this phase shifter being placed on the camera lens of an above-mentioned crystal projection unit, linearly polarized photon can be converted to left-hand polarization light, and before the phase shifter that has 3/4 wavelength phase shift function in this phase shifter being placed on the camera lens of an above-mentioned crystal projection unit, linearly polarized photon can be converted to right-handed polarized light, not lose visual original brightness.The polarization characteristic quadrature of the linear polarization optical filter that analyzing is used in its eyeglass.
Adopt this programme can embody following superiority: 1. to show the image that right and left eyes should be seen respectively with two crystal projection unit among the present invention program, placing one before the camera lens of two crystal projection unit respectively can make electric field component or magnetic-field component make the phase shifter of 1/4 wavelength phase shift and 3/4 wavelength phase shift, so just convert original linearly polarized photon to rotatory polarization light, one of them is a left-hand polarization light, another is a right-handed polarized light, owing to just linearly polarized photon is converted into rotatory polarization light, it does not cause the loss on any light intensity, has solved a great problem with the prior art ratio; 2. the optical filter of the linear polarization used by phase shifter and analyzing of the special spectacles used of this programme, it is at first with the linear polarized light of rotatory polarization photo-reduction, check with optical filter again, what its polarization direction was consistent with the checking bias slice direction can pass through, inconsistent just be rejected, can make respectively soon to due image; 3. the trial target of this programme is through on probation, and light intensity is loss not, and the cost of equipment is not high, and stable function is arranged, and worth batch process is promoted the use of.
Four. description of drawings: Fig. 1 is ultimate principle figure of the present invention.
Fig. 2 is the ultimate principle figure that rotatory polarization light forms.
Fig. 3 is the formation and the recovery of rotatory polarization light and watches the fundamental diagram of process.
Five. embodiment: now further specify this programme stereoprojection in conjunction with the accompanying drawings
Fig. 3 is the formation and the recovery of rotatory polarization light and watches the fundamental diagram of process.
Five. embodiment: the existing course of work that further specifies this programme stereo projection system in conjunction with the accompanying drawings.In Fig. 1,7,8,9, the light that sends of the three kinds of light sources of red R, green G, blue B in the expression crystal projection unit 2, the crystal projection unit shows red, green, blue matrix image with the mode display matrix of matrix, video synthesis unit 4 can synthesize a full-color image with separate red, green, blue matrix image, and throws away by camera lens 5.Red, green, blue three kinds of light do not have fixing polarization direction, the direction of vibration of its light is from all directions, but become linearly polarized photon through crystal projection unit 2 back output light 3, image driving signal 6 drives crystal projection unit 2, so that crystal projection unit 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 non-linear inclined to one side crystal projection unit or other flat panel display unit can not be used for the present invention.Two crystal projection unit can positioned vertical, but also horizontal setting, the output of 15 and 16 explanations, two projecting cells be the linear inclined to one side image that rises, it play folk prescription to can being arbitrarily.Time division type stereoscopic image signal playing device 10 and 11, they are with time division type stereo video signals or Computerized 3 D picture intelligence input computer picture system 12, it will react the left eye image and separate with even field by odd field with the vision signal of right eye image, form separate, synchronous left eye vision signal 25 and right eye vision signal 26, drop into crystal projection unit 13 and 14 then.The place ahead of the camera lens 15 of crystal projection unit has installed 1/4 wavelength phase shifter 17 additional, the place ahead of the camera lens 16 of crystal projection unit has installed 3/4 wavelength phase shifter 18 additional, the linearity that they export crystal projection unit 13 plays visual partially 15 and is converted to clockwise right-handed polarized light 28, and being played visual partially 16, the linearity that crystal projection unit 14 is exported is converted to counterclockwise left-hand polarization light 29, this rotatory polarization light stereoscopic image is projected on the metal screen 20 with good conducting function, it makes the rotatory polarization direction of projected image swing to 180 ° of back reflections and goes out, and enters observer's the 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 then become left-hand polarization light.Viewers wear rotatory polarization light filter goggle 23 is watched 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, it promptly is the left eye image of left projecting cell projection, and right eye can only receive left-hand polarization light, promptly is the right eye image 30 that right projecting cell projects, and passes through the synthetic formation stereoscopic image 27 of observer's brain at last.
The ultimate principle that forms left-hand polarization light and right-handed polarized light has been described in Fig. 2.The camera lens 15 and 16 of two crystal projection unit, 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 alternating electric field is 43 identical with the phase place of the field vector 35 of alternating magnetic field, these two synchronous field vectors synthesize the field vector 37 of linear oscillator, the essential characteristic of Here it is linearly polarized photon or linear polarization electromagnetic field.Installing one in the front of the camera lens 15 of projecting cell can be with the phase shifter 17 of electric field component 41 phase shifts 1/4 wavelength, phase invariant because of magnetic-field component 45, and the phase place of electric field component 41 is delayed time the formation of 1/4 wavelength backward 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 referred to as left-hand polarization light.Before the camera lens of crystal projection unit 16, settle the electric field phase shifter 18 of an energy with electric field 41 phase shifts 3/4 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 3/4 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 synthesize rotating vector 29, this rotating vector 29 turns clockwise in the face of the observer, and we are referred to as right-handed polarized light.Like this, if apparatus has the linear crystal projection unit 15 projection left eye images that play effect partially, another projecting cell 16 projection right eye images, and by 1/4 wavelength phase shifter 17 and 3/4 wavelength phase shifter 18 respectively with the phase place phase shift of its electric field component or magnetic-field component, then can form left eye image left-hand polarization and 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 the method have extremely strong luminance brightness, and be basic identical with the luminance brightness of former liquid crystal projecting cell, throw the image of left eyes and right eye respectively with two projecting cells, so the brightness of stereoscopic image will double in addition.
Above-mentioned method also can adopt a phase shifter that magnetic field is had 1/4 wavelength phase shift function with another phase shifter that magnetic field has 3/4 wavelength phase shift function to be carried out 1/4 or 3/4 wavelength phase shift respectively to the left eye image of linear polarization and the alternating magnetic field component in the right eye image respectively, realizes left-hand polarization light and right-handed polarized light.
Fig. 3 illustrates that this rotatory polarization light must project on the metal screen with good conductive characteristic, to form 180 ° of anti-phase reflection rotatory polarization light, has illustrated that also spectators watch the process of three-dimensional stereoscopic image simultaneously.The linear polarization image of camera lens 15 projections of left side projecting cell is 61, and phase shifter 17 can be with electric field component or magnetic-field component phase shift 1/4 wavelength, and this phase shifter is transparent, therefore light is not formed decay.Image 61 is through becoming left side piece of writing polarized light 28 after the phase shifters 17, when it is projected onto on the metal screen 60 with good conductive function, this screen will throw the 180 ° of back reflections of electromagnetic wave 28 paraphase that come and go back, formation right-handed polarized light 65.The linear polarization image 62 of the camera lens 16 right projecting cell projections of right projecting cell can be with electric field component or magnetic-field component phase shift 3/4 wavelength through phase shifter 18, this phase shifter also is transparent, can not form decay to light yet, image 62 becomes right-handed polarized light 29 after phase shifter 18, it projects on the metal screen 60 with good conductive function, the metal screen will throw the electromagnetic wave 29 reverse 180 ° of back reflections that come and go back, and form 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 the observer faces the electromagnetic wave propagation direction, resultant vector clockwise turns to right-handed polarized light, and resultant vector is left-hand polarization light for being rotated counterclockwise.The eyeglass of viewers wear is 70 and 71,70 on one of them eyeglass allows right-handed polarized light to pass through, do not allow left-hand polarization light to pass through, therefore spectators' left eye can be observed left eye stereoscopic image 68 by these glasses, and right eye can be observed the stereoscopic image 69 of right eye by these glasses, finally synthesizes stereoscopic image 63 through brain.
When passing through eyeglass 70,71 when observing the stereoprojection image that is reflected by metal screen 60, existing left-hand polarization light also has right-handed polarized light, it is the eyeglass that right-handed polarized light 65 and left-hand polarization light 66 arrive right and left eyes 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, just must be at first with the linear polarized light of rotatory polarization photo-reduction, in order to realize this purpose, the eyeglass that should adopt special material to make, a kind of is can be with the phase shifter 80 of electric field or magnetic field phase shift 1/4 wavelength, another kind is can be with the phase shifter 81 of electric field or magnetic field phase shift 3/4 wavelength, should be provided with respectively in their back can the quadrature analyzing linear polarization optical filter 82 and 83.If on 1/4 wavelength phase shifter 80, receive right-handed polarized light 65, then electric field or magnetic field are carried out the phase shift of 1/4 wavelength through this phase shifter 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 projecting cell projects.Receive left-hand polarization light 65 if can make the phase shifter 80 of 1/4 phase shift, then electric field or magnetic field are carried out the phase shift of 1/4 wavelength through phase shifter 80, the rotatory polarization photo-reduction is a linearly polarized photon, but the direction of vibration of the linearly polarized photon after the reduction is 93, it just in time is a quadrature with the analyzing direction of analyzing optical filter 82, so left eye can't be seen the image that right projecting cell projects.If the phase shifter 81 of 3/4 wavelength receives left-hand polarization light 66, then electric field or magnetic field are done the phase shift of 3/4 wavelength through phase shifter, former linearly polarized photon 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 projecting cell projects, if it receives right-handed polarized light 65, through phase shifter 81 electric field or magnetic field are carried out 3/4 phase shift, the rotatory polarization photo-reduction is a linearly polarized photon, but the direction of vibration of the linearly polarized photon after the reduction is 92, and the analyzing direction of the optical filter 83 that it and analyzing are used is quadrature just in time, so right eye can't be seen the image that left projecting cell projects.Left eye 89 receives the image 96 that image 95 right eyes 90 that left projecting cell projects receive right projecting unit projection, just can synthesize stereoscopic image 63 in brain.
The stereo projection system 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 projecting cell 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 (4)
1. stereo projection system, it is characterized in that this optical projection system is made up of two crystal projection unit, two phase shifters, the metal screen with good conductive function and glasses, its two projecting cells are parallel or vertical placement, launch two kinds of images that right and left eyes should be seen respectively, and can do linear rising partially projection image; Its phase shifter is before being placed on two crystal projection unit camera lenses, can be respectively linearity be played the phase shift that electric field component in the inclined to one side image or magnetic-field component carry out 1/4 wavelength and 3/4 wavelength and forms the rotatory polarization image; Throw away behind anti-phase 180 ° of the rotatory polarization image that its metal screen can come the projection of two crystal projection unit; The eyeglass of its glasses is by can with the electric field component in the light or magnetic-field component is carried out the phase shifter of 1/4 wavelength or 3/4 wavelength phase shift and the linear optical filter of analyzing constitutes, the phase shifter of right and left eyes eyeglass and examine the direction of linear optical filter and numerical value should and linearly play an inclined to one side parameter and adapts with the phase shifter of right and left eyes image projection unit.
2. according to the described stereo projection system of claim 1, it is characterized in that its two are parallel or vertically place and can be linear one of them projecting cell projection left eye image of inclined to one side crystal projection unit that rises of projection image, and another projecting cell projection right eye image, the image that each projecting cell projects all is a linear polarization.
3. according to the described stereo projection system of claim 1, it is characterized in that its two are placed on before two projecting cell camera lenses and can be respectively this linearity be played the phase shifter that electric field component in the inclined to one side image or magnetic-field component are carried out 1/4 wavelength and 3/4 wavelength phase shift, before the phase shifter that has 1/4 wavelength phase shift function in this phase shifter being placed on the camera lens of an above-mentioned crystal projection unit, linearly polarized photon can be converted to left-hand polarization light, and before the phase shifter that has 3/4 wavelength phase shift function in this phase shifter being placed on the camera lens of an above-mentioned crystal projection unit, linearly polarized photon can be converted to right-handed polarized light, not lose visual original brightness.
4. according to the described stereo projection system of claim 1, it is characterized in that the polarization characteristic quadrature of the linear polarization optical filter that analyzing is used in its eyeglass.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1232976A CN1232976A (en) | 1999-10-27 |
| CN1139834C true CN1139834C (en) | 2004-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB981016154A Expired - Lifetime CN1139834C (en) | 1998-04-22 | 1998-04-22 | High-brightness stereo projection technology |
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| CN (1) | CN1139834C (en) |
Families Citing this family (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 |
| US7891816B2 (en) * | 2008-02-25 | 2011-02-22 | Eastman Kodak Company | 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 |
| CN102591130B (en) * | 2011-03-30 | 2014-02-12 | 深圳市亿思达显示科技有限公司 | Projector and stereoscopic image system |
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1998
- 1998-04-22 CN CNB981016154A patent/CN1139834C/en not_active Expired - Lifetime
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| Publication number | Publication date |
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| CN1232976A (en) | 1999-10-27 |
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Owner name: CHUANGTU DEVELOPMENT CO., LTD. Free format text: FORMER NAME OR ADDRESS: LI CHANG |
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Address after: 518000 block D, 10 / F, China Overseas Building, 139 Hennessy Road, Wan Chai, Hongkong Patentee after: Hongkong Chuangtu Development Co., Ltd. Address before: No. fifth, seven Avenue, Tianjin economic and Technological Development Zone Patentee before: Li Chang |
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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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