CN1352404A - Double lens type projection display device - Google Patents
Double lens type projection display device Download PDFInfo
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- CN1352404A CN1352404A CN 00128310 CN00128310A CN1352404A CN 1352404 A CN1352404 A CN 1352404A CN 00128310 CN00128310 CN 00128310 CN 00128310 A CN00128310 A CN 00128310A CN 1352404 A CN1352404 A CN 1352404A
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- coloured light
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Abstract
In a double-lens type projecting display device, white light is separated by a spectroscope into the first and the second color light beam to the first polarizing selector and the third color light beam to a reflector; the first color light beam is changed in polarity in the first polarizing selector; the first and the second color light beams are projected by a first polarized light splitting prism to two light valves for modulation, the first color light beam is further changed in the polarity in a second polarizing selector before projected by a first lens; the third color light beam is reflected by a reflector and projected via a second polarized light splitting lens to another light valve for modulation before projected by the second lens; and thus the first color light beam and the second color light beam from the first lens are overlapped.
Description
The present invention relates to a kind of projection display equipment, particularly a kind of double lens type projection display device.
Common reflective liquid crystal light valve projection display equipment has single-lens formula and three-lens formula, single-lens formula has the advantages that volume is compact, be convenient for carrying, but because of back focal length difficulty design at the short distance inner projection and go out the larger area camera lens, and the requirement to related elements qualities such as employed camera lens and spectroscope, precision must be very high, causes cost to improve.For example, in the single-lens in the past formula projection display equipment,, make it have following shortcoming because of adopting the light-combining prism of making by four right-angle prisms:
1, the manufacture difficulty height of light-combining prism, its reason are because the accuracy requirement of four right-angle prisms must be very high when making, otherwise the magnification of light-combining prism during in order to synthetic three coloured light (as red, blue, green light) can difference, cause the picture element can't be overlapping.
2, owing to have glue-lines between four right-angle prisms, below 5micron (1micron is the 10-6 meter), just can avoid on projected picture, producing the situation of striped with the big palpulus of present picture element, when the liquid crystal light valve resolution improves, the existence of glue-lines will have negative effect to image quality between four right-angle prisms.
3, light-combining prism is owing to the reflection fully of each coloured light being provided or penetrating, therefore can cause staggered (cross talk) problem red, blue, green light, for example arbitrary red, blue, coloured light that the brilliant light valve of green liquor is sent is by light-combining prism the time, can cause color impure because the part of light-combining prism reflects or penetrates shines on other two liquid crystal light valves.
4, the back is burnt oversize, this be because between each camera lens and liquid crystal light valve across light-combining prism, cause burnt thereafter distance elongated.
Do not use at present the single-lens formula projection display equipment of above-mentioned light-combining prism in addition, single-lens formula projection display equipment 1 as shown in Figure 1, this single-lens formula projection display equipment 1 comprises one first light polarization selector switch 111, one second light polarization selector switch 112, one polar biased light Amici prism 12, one bi-coloured light separation prism 13, one the 1 light valve 141-143, one Polarizer 15, one camera lens 16 etc., one white light 10 can be isolated and to synthesize first of this white light, second, the 3rd coloured light 101,102,103 (as red, blue, green), make the one one three coloured light 101-103 be subjected to each corresponding the first-the three light valve 141-143 modulation that is provided with respectively.
This first, second light polarization selector switch 111,112 can adopt the ColorSelect Filters product of ColorLink company manufacturing, it act as the polarity of the polarized predetermined coloured light (as green light) of conversion, for example will originally be transformed into the green light of P (S) polarization for the green light of S (P) polarization, and in Fig. 1 design this first, second light polarization selector switch 111,112 in order to do the conversion of polarity at the 3rd coloured light 103.
This polar biased light Amici prism 12, but the coloured light of vertical reflection S polarization, and the coloured light of P polarization is directly penetrated.
This bi-coloured light separation prism 13 is in order to separate two kinds of predetermined coloured light, in Fig. 1 design, when first, second coloured light 101,102 enters this bi-coloured light separation prism 13, can allow first coloured light 101 directly pass through, and make second coloured light 102 make vertical reflection, to reach the effect of separating two kinds of different color lights.
Above-mentioned the first-the three coloured light 101-103 is incident upon respectively on these the first-the three light valve 141-143, and when these the first-the three light valve 141-143 are subjected to the bias voltage conducting, modulation and change the polarity of its polarization and reflect the coloured light of sending reciprocal opposed polarity in addition.The following stated all is that the situation when being conducting with the first-the three light valve 141-143 illustrates.
This Polarizer 15, with so that the more purifying of coloured light that respectively polarizes that passes through with predetermined polarity, the design of Fig. 1 with so that the coloured light of P polarization by the time purifying more.
So when this first light polarization selector switch 111 was passed through in white light 10 projections of one polarized (for example S polarization), this first, second coloured light 101,102 was kept original S polarization, and the 3rd coloured light 103 is transformed into the P polarization.Then when each coloured light is delivered to this polar biased light Amici prism 12, by this polar biased light Amici prism 12 first, second coloured light 101,102 (as red, blue light) vertical reflection of S polarization is delivered to this bi-coloured light separation prism 13 (Dichroic splitter prism), and make the 3rd coloured light 103 (as green light) of this P polarization directly penetrate polar biased light Amici prism 12.
When first, second coloured light 101,102 of above-mentioned S polarization arrives at bi-coloured light separation prism 13, this first coloured light 101 directly penetrates bi-coloured light separation prism 13 and is incident upon on first light valve 141, be subjected to these first light valve, 141 modulations and change the polarity back reflection to send reciprocal P first coloured light 101 that polarizes, then successively by bi-coloured light separation prism 13, polar biased light Amici prism 12, and continue by the second light polarization selector switch 112 and Polarizer 15, by obtain more the P of purifying first coloured light 101 that polarizes by this Polarizer 15.
When arriving at bi-coloured light separation prism 13, second coloured light 102 of S polarization is incident upon on second light valve 142 by vertical reflection, be subjected to these second light valve, 142 modulation back reflections to go out reciprocal P second coloured light 102 that polarizes, then through bi-coloured light separation prism 13 vertical reflections and by behind the polar biased light Amici prism 12, same successively by aforesaid second light polarization selector switch 112 and the Polarizer 15, and obtain more the P of purifying second coloured light 102 that polarizes.
The 3rd coloured light 103 that is transformed into P polarization by the first light polarization selector switch 111 and directly penetrates polar biased light Amici prism 12 is incident upon on the 3rd light valve 143, be subjected to the 3rd light valve 143 modulation back reflections to send reciprocal S the 3rd coloured light 103 that polarizes, then behind the vertical reflection of polar biased light Amici prism 12, again successively by the aforementioned second light polarization selector switch 112 and Polarizer 15, this second light polarization selector switch 112 changes it into P polarization, again by obtain more the P of purifying the 3rd coloured light 103 that polarizes by Polarizer 15.
After first, second, third coloured light 101,102,103 of above-mentioned P polarization was sent from Polarizer 15, the camera lens 16 of resultant image made luminous energy of all kinds be incident upon on the default projection screen with resultant image via camera lens 16 in order to project each coloured light by one together.
Do not use the light-combining prism of forming by four prisms in the element of single-lens in the past formula projection display equipment 1, but by a polar biased light Amici prism 12, one can be with first, second coloured light 101, the 102 bi-coloured light separation prism 13 of separating, arrange in pairs or groups two and can make first of polarity transformation predetermined coloured light (the 3rd coloured light 103), the second light polarization selector switch 111,112, to reach white light is isolated the effect that three coloured light are closed light after via each light valve modulation again, but its same in design burnt long situation in back that exists, the frequency spectrum of 13 pairs first coloured light 101 of the bi-coloured light separation prism that is used in addition (red light) has displacement (shift) phenomenon, thereby influence its image quality, and the 3rd coloured light that is changed into the P polarization is by polar biased light Amici prism 12 time, as known in the art because the restriction of the manufacturing technology of polar biased light Amici prism 12, polar biased light Amici prism 12 can not have the very high efficient that penetrates, the 3rd coloured light reflection that has suitable P polarization enters first light valve 141 and second light valve 142, makes the image contrast reduce.
In addition, design relevant for three-lens formula projection display equipment, though volume is bigger, but back Jiao is shorter, more easily design and to go out the larger area projection lens than the short distance inner projection, yet its employed three-lens needs to dispose by more highly difficult deviation (offset) in contraposition with respect to three liquid crystal light valves, at least need two groups of light valves and camera lens are done the contraposition adjustment, certainly also having needs three light valves and three-lens are done the design that contraposition is adjusted, and just can make the image overlap of three-lens be projected in same position.
Aforementioned common single-lens formula projection display equipment perhaps by because of using the existing shortcoming of being made up of four prisms of light-combining prism, perhaps has because of using the bi-coloured light separation prism to cause the frequency spectrum of predetermined coloured light that the shortcoming of displacement phenomenon is arranged.And the design of three-lens formula projection display equipment has more highly difficult deviation (offset) configuration at three-lens with respect to three liquid crystal light valves in contraposition.
The object of the present invention is to provide a kind of double lens type projection display device, make its need to single light valve and single-lensly do the contraposition adjustment, and avoid using light-combining prism and the bi-coloured light separation prism of forming by four prisms, and reduce manufacture difficulty and avoid the frequency spectrum of predetermined coloured light to produce displacement.
Double lens type projection display device of the present invention, to be subjected to the white light of predetermined polarization to isolate one by a spectroscope advances and delivers to first of one first light polarization selector switch toward predetermined direction, second coloured light, and advance and deliver to the 3rd coloured light of a catoptron toward another different directions, after borrowing this first light polarization selector switch to change the polarity of first coloured light, continuation through one first polar biased light Amici prism with respectively with first, second coloured light is projected to one first, second light valve is done to be sent to one second light polarization selector switch behind the modulation, change the polarity of first coloured light once more after the warp let-off one first camera lens project.The 3rd coloured light is subjected to above-mentioned mirror reflects through one second polar biased light Amici prism, and be projected to one the 3rd light valve carry out modulation after the warp let-off one second camera lens project, overlapping with first, second coloured light that aforementioned first camera lens is projected with resultant image.
Below in conjunction with drawings and Examples double lens type projection display device of the present invention is elaborated, in the drawings:
Fig. 1 is a kind of schematic top plan view of existing single-lens formula projection display equipment;
Fig. 2 is the schematic perspective view of embodiment of the invention double lens type projection display device;
Fig. 3 is the schematic side view of first and second coloured light transmission course in the embodiment of the invention;
Fig. 4 is the schematic side view of the 3rd coloured light transmission course in the embodiment of the invention.
Be embodiment of the invention double lens type projection display device as shown in Figure 2, this double lens type projection display device 2 comprises a spectroscope 21, one first light polarization selector switch 221, one second light polarization selector switch 222, one first polar biased light Amici prism 231, one second polar biased light Amici prism 232, one the first-the three light valve 241-243, one catoptron 25 and one first camera lens 26 that is the isoplanar configured in parallel and one second camera lens 27 etc., can synthesize first of this white light and a white light 3 can be isolated, second, the 3rd coloured light 31,32,33 (as red, blue, green), make this first-the three coloured light 31-33 be subjected to corresponding the first-the three light valve 241-243 modulation that is provided with respectively.Situation when the first-the three light valve 241-243 is in conducting state will be described below.
This spectroscope 21, it is in order to first, second coloured light 31,32 (as red, blue light) of vertical reflection, and the 3rd coloured light 33 (as green light) is directly passed through.
This first, second light polarization selector switch 221,222, can use the ColorSelect Filters product of ColorLink company manufacturing, this product can will have the polar switching of polarized predetermined coloured light, is that first coloured light 31 (as red light) that will polarize for S (P) originally changes P (S) polarization in the present embodiment.
But the coloured light of this first, second polar biased light Amici prism 231,232 vertical reflection S polarization, and the coloured light of P polarization is directly penetrated.
The first-the three light valve 241-243 is an optical valve in reflection type, can be when above-mentioned the first-the three coloured light 31-33 throw thereon respectively, and modulation and change the polarity of its polarization and reflect reciprocal opposed polarity coloured light in addition.
This catoptron 25 can be in order to reflect each coloured light.
Below for convenience of description, in Fig. 3 and Fig. 4, will be denoted as 311,321,331 respectively, will be denoted as 312,322,332 respectively by first, second, third coloured light that P polarizes in addition by first, second, third coloured light that S polarizes.
In Fig. 2,3,4, with 26,27 on first and second camera lens towards the position be the place ahead and first, second camera lens 26,27 office left and right sides, directional reference as relative position is illustrated, just in the configuration, in the present embodiment white light 3 that is polarized, turns right by S is incident upon by down on the spectroscope 21 of the oblique setting in upper right side, and isolate up the S of vertical reflection polarize first, second coloured light 311,32I and the 3rd coloured light 331 of turning right and penetrating.
After first coloured light 311 of S polarization is up reflected by aforementioned spectroscope 21, as shown in Figure 3, to continue by this horizontally disposed first light polarization selector switch 221, first coloured light 311 is transformed into first coloured light 312 of P polarization by this first light polarization selector switch 221, and second coloured light 321 is kept original S polarization, when then up arriving at this first polar biased light Amici prism 231, first coloured light 312 can directly penetrate the first polar biased light Amici prism 231 and arrive at this first light valve 241, and be subjected to send behind first light valve, 241 modulations down S first coloured light 311 that polarizes in the other direction, therefore can be arrived at this second light polarization selector switch 222 forward by first polar biased light Amici prism 231 vertical reflections.
After second coloured light 321 of S polarization is up reflected by spectroscope 21, continue by the aforementioned first light polarization selector switch 221, because this first light polarization selector switch 221 can only change the polarity of first coloured light 31, therefore second coloured light 321 is up by behind the first light polarization selector switch 221, still keep original S polarization, then when second coloured light 321 arrives at the first polar biased light Amici prism 231, by retro-reflection and arrive at second light valve 242, and be subjected to send behind second light valve, 242 modulations forward P second coloured light 322 that polarizes in the other direction, therefore can directly penetrate the first polar biased light Amici prism 231 forward and arrive at this second light polarization selector switch 222.
When polarize first coloured light 311 and P of aforementioned S polarizes second coloured light 322 when arriving at the second light polarization selector switch 222, when first coloured light 311 passes through this second light polarization selector switch 222, its polarity will be changed and become first coloured light 312 of P polarization, and second coloured light 322 will be kept its original polarity by the second light polarization selector switch 222, so all be forward first coloured light 312 and second coloured light 322 of P polarization at last by this first camera lens 26.
In addition, the 3rd coloured light 331 that polarizes as S passes the spectroscope 21 shown in Fig. 2, and turn right when arriving at the catoptron 25 parallel with spectroscope 21, the 3rd coloured light 331 will be as shown in Figure 4, to up be reflexed to this second polar biased light Amici prism 232, and arrived at the 3rd light valve 243 by retro-reflection, by sending in the other direction forward P second coloured light 332 that polarizes behind the 3rd light valve 243 modulations, and arrive at second camera lens 27 corresponding with it, therefore last is the 3rd coloured light 332 of P polarization by this second camera lens 27 forward.
The whole double lens type projection display device 2 of another embodiment of the present invention, because this device 2 is to be projected forward for first, second coloured light 31,32 behind the modulation by first camera lens 26 respectively, reach by second camera lens 27 and project forward for the 3rd coloured light 33, therefore as long as single-lens (second camera lens 27) and single light valve (the 3rd light valve 243) are done skew contraposition adjustment, the image overlap that its image energy that projects forward and aforementioned first camera lens 26 are projected gets final product, therefore certain simplicity of design than the three-lens formula in contraposition.
And present embodiment double lens type projection display device 2 does not use light-combining prism and the bi-coloured light separation prism of in the past being made up of four prisms in the element that uses, and therefore can reduce manufacture difficulty and avoid the frequency spectrum of predetermined coloured light to produce displacement.
In addition, can be in the present embodiment 241,242 of the above-mentioned second polar biased light Amici prism 232 and 243 of the 3rd light valves and the above-mentioned first polar biased light Amici prism 231 and first, second light valves, each installs one 1/4 ripple plates (representing with graphic work no longer in addition in the present embodiment), and can be 222 of first camera lens 26 and the second light polarization selector switchs and 232 of second camera lens 27 and the second polar biased light Amici prisms, each installs a Polarizer separately, to increase the contrast of each coloured light.Elements such as 1/4 ripple plate of this place increase configuration and Polarizer owing to be the general requirements product all, seldom explain at this.
Take a broad view of above-mentioned, the present invention can provide a kind of double lens type projection display device really, make it and single-lensly do the contraposition adjustment and get final product to single light valve, this contraposition than three-lens formula design in the past is simple, and the employed element of present embodiment no longer adopts light-combining prism and the bi-coloured light separation prism of being made up of four prisms in the single-lens in the past formula design, thereby reduces manufacture difficulty and avoid the frequency spectrum of predetermined coloured light to produce displacement.
Claims (3)
1, a kind of double lens type projection display device, comprise a spectroscope, one first light polarization selector switch, one second light polarization selector switch, one first polar biased light Amici prism, one second polar biased light Amici prism, reflective one the first-the three light valve, a catoptron and be one first camera lens and one second camera lens of isoplanar configured in parallel, and a white light can be isolated first, second, third coloured light that can synthesize described white light, make described the one one three coloured light be subjected to described the first-the three light valve modulation respectively;
It is characterized in that:
Described spectroscope, be used for to be subjected to the white light of predetermined polarization to isolate one and advance and deliver to described first coloured light and described second coloured light of the described first light polarization selector switch, and past another different directions is advanced and delivered to described the 3rd coloured light of described catoptron toward predetermined direction;
The described first light polarization selector switch is used for making aforementioned first, second coloured light to pass through, and changes the polarity of first coloured light;
The described first polar biased light Amici prism, be arranged at the described first light polarization selector switch and export on the direction of first, second coloured light, carry out being sent to the described second light polarization selector switch behind the modulation and respectively first, second coloured light is projected to described first light valve and described second light valve;
The described second light polarization selector switch, for first, second coloured light by the time project in order to the polarity that changes first coloured light and via described first camera lens;
Described catoptron is in order to reflex to the 3rd coloured light the described second polar biased light Amici prism;
The described second polar biased light Amici prism is used for that the 3rd coloured light is projected to described the 3rd light valve and carries out modulation after projected by this second camera lens.
2, double lens type projection display device as claimed in claim 1 is characterized in that: between described second polar biased light Amici prism and the 3rd light valve and between the described first polar biased light Amici prism and first, second light valve, each installs one 1/4 ripple plates.
3, double lens type projection display device as claimed in claim 1 is characterized in that: between described first camera lens and the second light polarization selector switch and between second camera lens and the second polar biased light Amici prism, respectively be equiped with a Polarizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00128310 CN1352404A (en) | 2000-11-10 | 2000-11-10 | Double lens type projection display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00128310 CN1352404A (en) | 2000-11-10 | 2000-11-10 | Double lens type projection display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1352404A true CN1352404A (en) | 2002-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00128310 Pending CN1352404A (en) | 2000-11-10 | 2000-11-10 | Double lens type projection display device |
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| Country | Link |
|---|---|
| CN (1) | CN1352404A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7080908B2 (en) | 2002-09-03 | 2006-07-25 | Young Optics Inc. | Optical system for projection display apparatus |
| CN103034020A (en) * | 2012-12-12 | 2013-04-10 | 广东欧珀移动通信有限公司 | Sharing device of shooting visual angle, mobile terminal and method |
| CN113552758A (en) * | 2021-07-28 | 2021-10-26 | 深圳市奥康科技有限公司 | Portable projector applied to home theater |
-
2000
- 2000-11-10 CN CN 00128310 patent/CN1352404A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7080908B2 (en) | 2002-09-03 | 2006-07-25 | Young Optics Inc. | Optical system for projection display apparatus |
| CN103034020A (en) * | 2012-12-12 | 2013-04-10 | 广东欧珀移动通信有限公司 | Sharing device of shooting visual angle, mobile terminal and method |
| CN103034020B (en) * | 2012-12-12 | 2015-09-02 | 广东欧珀移动通信有限公司 | Shooting visual angle sharing means, mobile terminal and method |
| CN113552758A (en) * | 2021-07-28 | 2021-10-26 | 深圳市奥康科技有限公司 | Portable projector applied to home theater |
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Owner name: PROKIA TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: DA SCIENCE + TECHNOLOGY CO., LTD. Effective date: 20031119 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20031119 Address after: Tainan County of Taiwan Province Applicant after: Prokia Technology Co., Ltd. Address before: Taiwan County of Tainan Province Shi Xiang Tainan Science Park South Road No. 3 Applicant before: Dayi Science and Technology Co., Ltd. |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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