CN103543588B - The optical system of projector and projector - Google Patents
The optical system of projector and projector Download PDFInfo
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- CN103543588B CN103543588B CN201310530521.3A CN201310530521A CN103543588B CN 103543588 B CN103543588 B CN 103543588B CN 201310530521 A CN201310530521 A CN 201310530521A CN 103543588 B CN103543588 B CN 103543588B
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- light
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- polarizer
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- 230000003287 optical effect Effects 0.000 title claims abstract description 38
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 58
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 40
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000010521 absorption reaction Methods 0.000 claims abstract description 7
- 239000000758 substrate Substances 0.000 claims description 18
- 239000011521 glass Substances 0.000 claims description 6
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000002194 synthesizing effect Effects 0.000 claims description 3
- 230000004446 light reflex Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006854 communication Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
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- Projection Apparatus (AREA)
- Liquid Crystal (AREA)
- Polarising Elements (AREA)
Abstract
The present invention relates to a kind of optical system and projector of projector.The Polarizer that the optical system of this projector comprises the light source be arranged in the casing of projector, liquid crystal processor, light compositing device and is arranged at rotationally in the casing of projector; Wherein, the light that light source sends is incident in liquid crystal processor, liquid crystal processor carries out the light after processing formation processing to light, and the light after process is incident in light compositing device, light compositing device carries out synthesis to the light after process and forms synthesis light, and synthesis light is incident in Polarizer, after Polarizer absorption portion synthesis light, remaining synthesis light is projected to projection screen.A rotating Polarizer is used to partially absorb the synthesis light synthesized through light compositing device, Polarizer can constantly convert the position be irradiated by light when absorbing light, thus can thermally equivalent, prevent local be irradiated by light and cause local temperature too high, effectively prevent from burning out.
Description
Technical field
The present invention relates to projector equipment, particularly relate to a kind of optical system and projector of projector.
Background technology
Modern society, projector uses more and more extensive, and the requirement of people to projector's quality is also more and more higher.The most important thing is the serviceable life of projector, people, when use projector, often do not wish to go wrong.A place being easy to go wrong of projector is the Polarizer of projector.In the optical system of projector, what sent by light source according to the direction of vibration of light is divided into P light and S light.Wherein, P light and S light respectively account for half.P light is not by Polarizer, and when P light is by being absorbed by Polarizer during Polarizer, and S light freely can pass through Polarizer.In order to improve the utilization factor of light, a series of optical module is set in projector P light is become S light, when pure S light is by liquid crystal panel, liquid crystal panel can change into P light unwanted S light, then Polarizer is passed through, P light absorption in light is fallen by Polarizer, and S light can freely pass through, and finally casts required image on the projection screen.
In sum, the Polarizer in projector is used to the element absorbing unnecessary P light, but to absorb light energy conversion after P light be heat energy to Polarizer, along with the growth of time, the temperature of Polarizer can be more and more higher, if when exceeding certain value, Polarizer can be burned, and projector loses projecting function.Under many circumstances, projector can not normally use because Polarizer burns out.The too high reason of Polarizer temperature, except heat radiation not in time, also has an even more important reason to be that Polarizer is fixedly installed between liquid crystal processor and light compositing device, and Polarizer fixed position is irradiated by light for a long time and causes Polarizer to be burned.
Due to the restriction of light path and the restriction in space, the optical system of traditional projector is difficult to transform to prevent Polarizer from burning out to the setting of Polarizer.
Summary of the invention
Based on this, be necessary the optical system for providing a kind of projector that can effectively prevent Polarizer from burning out.
Further, a kind of projector using the optical system of above-mentioned projector is provided.
An optical system for projector, comprising:
Light source, is arranged in the casing of projector;
Liquid crystal processor, is arranged in the casing of described projector;
Light compositing device, is arranged in the casing of described projector; And
A Polarizer, is arranged in the casing of described projector rotationally;
Wherein, the light that described light source sends is incident in described liquid crystal processor, described liquid crystal processor carries out the light after processing formation processing to described light, and the light after described process is incident in described light compositing device, described light compositing device carries out synthesis to the light after described process and forms synthesis light, and described synthesis light is incident in described Polarizer, after synthesizing light described in described Polarizer absorption portion, remaining described synthesis light is projected to projection screen.
Wherein in an embodiment, also comprise the first spectroscope, the second spectroscope, the first catoptron, the second catoptron and the 3rd catoptron, described liquid crystal processor comprises the first liquid crystal panel, the second liquid crystal panel and the 3rd liquid crystal panel, wherein,
The light that described light source sends is divided into the first color of light and the second color of light by described first spectroscope, and described first color of light reflexes in described first liquid crystal panel by described first catoptron;
Described second color of light is divided into the 3rd color of light and the 4th color of light by described second spectroscope, and described 3rd color of light is incident in described second liquid crystal panel;
Described second catoptron and the 3rd catoptron reflect described 4th color of light successively, make described 4th color of light enter in described 3rd liquid crystal panel;
Described first liquid crystal panel, the second liquid crystal panel and the 3rd liquid crystal panel carry out the 3rd color of light after the first color of light after processing formation processing, process and the 4th color of light after process to described first color of light, the 3rd color of light and the 4th color of light respectively, the 3rd color of light after the first color of light after described process, process and the 4th color of light after process are synthesized synthesis light by described light compositing device, and described synthesis light is projected to projection screen after the partially absorbing of described Polarizer.
Wherein in an embodiment, described Polarizer comprises substrate and is arranged at the light polarizing film on described substrate surface.
Wherein in an embodiment, described light polarizing film is circular light polarizing film or annular light polarizing film.
Wherein in an embodiment, described substrate is glass substrate.
Wherein in an embodiment, the thickness of described glass substrate is 1 ~ 2 millimeter.
Wherein in an embodiment, described first spectroscope is blue light splitting mirror, and described second spectroscope is green spectroscope.
Wherein in an embodiment, described first spectroscope, the second spectroscope, the first catoptron and the second mirror parallel, formed by described first catoptron and the 3rd catoptron, acute angle is 45 °.
Wherein in an embodiment, also comprise motor, described motor is arranged in the casing of described projector, and the motor shaft of described motor is connected with described Polarizer and makes described Polarizer rotatable.
A kind of projector using the optical system of above-mentioned projector.
The optical system of above-mentioned projector uses a rotating Polarizer to partially absorb the synthesis light synthesized through light compositing device, because Polarizer is rotatable, it is made can constantly to convert the position be irradiated by light when absorbing light, thus can thermally equivalent, prevent local be irradiated by light and cause local temperature too high, effectively prevent from burning out.Therefore, the serviceable life of the projector of improving the optical system using this projector is conducive to.
Accompanying drawing explanation
Fig. 1 is the structural representation of the optical system of the projector of an embodiment;
Fig. 2 is the structural representation of another angle of the optical system of the projector shown in Fig. 1;
The light path schematic diagram that Fig. 3 is the optical system of the projector shown in Fig. 1.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.Set forth a lot of detail in the following description so that fully understand the present invention.But the present invention can be much different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar improvement when intension of the present invention, therefore the present invention is by the restriction of following public concrete enforcement.
Refer to Fig. 1, the optical system 100 of the projector of an embodiment, comprise light source 10, liquid crystal processor 20, light compositing device 30 and a Polarizer 40.
Light source 10, liquid crystal processor 20 and light compositing device 30 are all fixedly installed in the casing of projector, and Polarizer 40 is arranged in the casing of projector rotationally.
The light that light source 10 sends enters in liquid crystal processor 20, the light sent light source 10 of liquid crystal processor 20 carries out the light after processing formation processing, and the light after process is incident to light compositing device 30, light compositing device 30 carries out synthesis to the light after process and forms synthesis light, and synthesis light is incident in Polarizer 40, after Polarizer 40 absorption portion synthesis light, remaining synthesis light is projected to projection screen.
The synthesis illumination of synthesizing through light compositing device 30 is penetrated on Polarizer 40, to be made Polarizer 40 absorption portion through synthesis light, Polarizer 40 can quick rotation, it is made can constantly to convert the position be irradiated by light when absorbing light, thus can thermally equivalent, prevent local be irradiated by light and cause local temperature too high, effectively prevent from burning out.Therefore, the serviceable life of the projector of improving the optical system 100 using this projector is conducive to.
Light compositing device 30 is preferably and closes look prism.
Refer to Fig. 2, the optical system 100 of this projector also comprises motor 60.Motor 60 is arranged in the casing of projector, and the motor shaft 62 of motor 60 is connected with Polarizer 40 to drive Polarizer 40 to rotate.
Preferably, light source 10 is white light source.The optical system 100 of projector also comprises the first spectroscope 51, second spectroscope 52, first catoptron 53, second catoptron 54 and the 3rd catoptron 55.
Liquid crystal processor 20 comprises the first liquid crystal panel 22, second liquid crystal panel 24 and the 3rd liquid crystal panel 26.Wherein, first liquid crystal panel 22 is arranged at the relative both sides of light compositing device 30 with the 3rd liquid crystal panel 26, second liquid crystal panel 24 is arranged at the other side of light compositing device 30, and the plane orthogonal at the plane at the second liquid crystal panel 24 place and the first liquid crystal panel 22 place, simultaneously with the plane orthogonal at the 3rd liquid crystal panel 26 place.
First spectroscope 51, second spectroscope 52, first catoptron 53, second catoptron 54 and the 3rd catoptron 55 rational deployment are to make the light path of the optical system 100 of this projector as shown in Figure 3.
Refer to Fig. 3, the white light 101 that light source 10 sends is divided into the first color of light 102 and the first color of light 102 reflexes in the first liquid crystal panel 22 by the second color of light 103, first catoptron 53 through the first spectroscope 51.
Second color of light 103 is divided into the 3rd color of light 104 and the 4th color of light 105 by the second spectroscope 52, and the 3rd color of light 104 is incident in the second liquid crystal panel 24.
Second catoptron 54 and the 3rd catoptron 55 reflect the 4th color of light 105 successively, and the 4th color of light 105 is incident in the 3rd liquid crystal panel 26.
First color of light 102 enters light synthesizer 30 after the process of the first liquid crystal panel 22,3rd color pipe 104 enters light synthesizer the 30, four color of light 105 and enter light synthesizer 30 after the process of the 3rd liquid crystal panel 26 after the process of the second liquid crystal panel 24.
The 3rd color of light 104 after the first color of light 102 after process, process and the 4th color of light 105 after process form synthesis light 106 after the synthesis of light compositing device 30, synthesis light 106 is incident to Polarizer 40, is projected to projection screen 200 after synthesis light 106 is partially absorbed by Polarizer 40.
Preferably, the first spectroscope 51, second spectroscope 52, first catoptron 53 is parallel with the second catoptron 54, and formed by the first catoptron 53 and the 3rd catoptron 55, acute angle is 45 °, to reduce the loss of light in communication process preferably, improves the utilization factor of light.
Preferably, the first spectroscope 51 is blue light splitting mirror, and the second spectroscope 52 is green spectroscope.First color of light 102 is blue light, and the second color of light 103 is for closing coloured light, and the 3rd color of light 104 is red light, and the 4th color of light 105 is green light.
In blue light, red light and green light, the light intensity of green light is the strongest, and blue light takes second place, and red light is the most weak.The light path of the 4th color of light 105 is the longest, and therefore, the loss of green light is maximum.Light path like this is arranged, and solves the problem that green light causes temperature higher because light intensity is the strongest, is conducive to the serviceable life extending projector.
The optical system of traditional projector, all that employing three Polarizers absorb P light, a Polarizer is fixedly installed between the first liquid crystal panel 22 and light compositing device 30, another Polarizer is fixedly installed between the second liquid crystal panel 24 and light compositing device 30, and last Polarizer is fixedly installed between the 3rd liquid crystal panel 26 and light compositing device 30.Light compositing device 30 is entered again after the first color of light 102 of the first liquid crystal panel 22 process is first absorbed P light by Polarizer, enter light compositing device 30 again after the 3rd color of light 104 processed through the second liquid crystal panel 24 is first absorbed P light by Polarizer, after the 4th color of light 105 processed through the 3rd liquid crystal panel 26 is first absorbed P light by Polarizer, enter light compositing device 30 again.
The optical system 100 of the projector of present embodiment carries out light path improvement, make the first color of light 102, the 3rd color of light 104 and the 4th color of light 105 through the synthesis of light compositing device 30, then be projected to projection screen 200 again with the P light that the disposable absorption of a rotating Polarizer 40 is unnecessary.
The P light that the optical system 100 of this projector only uses a disposable absorption of Polarizer 40 unnecessary, compared with the optical system of traditional projector, can save two Polarizers, make the more compact structure of projector inside, simplifies the preparation technology of projector.Further, operationally, this Polarizer 40 can rotate, thus constantly can convert and receive light-struck position, be heated evenly, avoid local overheating cause temperature too high and Polarizer 40 is burned, be conducive to the serviceable life of the projector of improving the optical system 100 using this projector.
Please again consult Fig. 2, Polarizer 40 comprises substrate 42 and is arranged at the light polarizing film 44 on substrate 42 surface.The electrode axis 62 of motor 60 is connected to the middle part of substrate 42.Light polarizing film 44 is towards the incident direction of synthesis light 106.
Light polarizing film 44 is preferably circular light polarizing film or annular light polarizing film, and during fully to ensure that Polarizer 40 rotates, synthesis light 106 all can be irradiated in light polarizing film 44.
Substrate 42 is preferably circular, to close with the matching form of light polarizing film 44, facilitates light polarizing film 44 to fit on the surface of substrate 42.
Preferably, substrate 42 is glass substrate, better with the optical accuracy and physical strength that make Polarizer 40.
Preferably, in order to reduce light loss and improve heat dispersion, the thickness of glass substrate is 1 ~ 2 millimeter.
Polarizer 40 is arranged on synthesis light 106 position out that light compositing device 30 synthesizes by the optical system 100 of the projector of present embodiment, by the unwanted P light of the improvement disposable absorption of light path, and by rationally arranging the structure of Polarizer 40 and making Polarizer 40 rotatable, local heating's situation of Polarizer 40 can be improved and improve the radiating effect of Polarizer 40, Polarizer 40 effectively can be avoided to be burned, thus to improve the serviceable life of projector.
Further, provide a kind of projector using the optical system 100 of above-mentioned projector, owing to employing the optical system 100 of this projector, Polarizer 40 can thermally equivalent, avoids local overheating and is burned, making the serviceable life of this projector longer.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (7)
1. an optical system for projector, is characterized in that, comprising:
Light source, is arranged in the casing of projector;
Liquid crystal processor, is arranged in the casing of described projector;
Light compositing device, is arranged in the casing of described projector; And
A Polarizer, is arranged in the casing of described projector rotationally;
Wherein, the light that described light source sends is incident in described liquid crystal processor, described liquid crystal processor carries out the light after processing formation processing to described light, and the light after described process is incident in described light compositing device, described light compositing device carries out synthesis to the light after described process and forms synthesis light, and described synthesis light is incident in described Polarizer, after synthesizing light described in described Polarizer absorption portion, remaining described synthesis light is projected to projection screen;
Described Polarizer comprises substrate and is arranged at the light polarizing film on described substrate surface; Described light polarizing film is circular light polarizing film or annular light polarizing film;
Also comprise motor, described motor is arranged in the casing of described projector, and the motor shaft of described motor is connected with described Polarizer and makes described Polarizer rotatable.
2. the optical system of projector according to claim 1, it is characterized in that, also comprise the first spectroscope, the second spectroscope, the first catoptron, the second catoptron and the 3rd catoptron, described liquid crystal processor comprises the first liquid crystal panel, the second liquid crystal panel and the 3rd liquid crystal panel, wherein
The light that described light source sends is divided into the first color of light and the second color of light by described first spectroscope, and described first color of light reflexes in described first liquid crystal panel by described first catoptron;
Described second color of light is divided into the 3rd color of light and the 4th color of light by described second spectroscope, and described 3rd color of light is incident in described second liquid crystal panel;
Described second catoptron and the 3rd catoptron reflect described 4th color of light successively, make described 4th color of light enter in described 3rd liquid crystal panel;
Described first liquid crystal panel, the second liquid crystal panel and the 3rd liquid crystal panel carry out the 3rd color of light after the first color of light after processing formation processing, process and the 4th color of light after process to described first color of light, the 3rd color of light and the 4th color of light respectively, the 3rd color of light after the first color of light after described process, process and the 4th color of light after process are synthesized synthesis light by described light compositing device, and described synthesis light is projected to projection screen after the partially absorbing of described Polarizer.
3. the optical system of projector according to claim 1, is characterized in that, described substrate is glass substrate.
4. the optical system of projector according to claim 3, is characterized in that, the thickness of described glass substrate is 1 ~ 2 millimeter.
5. the optical system of projector according to claim 2, is characterized in that, described first spectroscope is blue light splitting mirror, and described second spectroscope is green spectroscope.
6. the optical system of projector according to claim 2, is characterized in that, described first spectroscope, the second spectroscope, the first catoptron and the second mirror parallel, and formed by described first catoptron and the 3rd catoptron, acute angle is 45 °.
7. one kind uses the projector of the optical system of the projector as described in any one of claim 1 ~ 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310530521.3A CN103543588B (en) | 2013-10-30 | 2013-10-30 | The optical system of projector and projector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310530521.3A CN103543588B (en) | 2013-10-30 | 2013-10-30 | The optical system of projector and projector |
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| Publication Number | Publication Date |
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| CN103543588A CN103543588A (en) | 2014-01-29 |
| CN103543588B true CN103543588B (en) | 2016-02-17 |
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| CN111730861A (en) * | 2020-06-30 | 2020-10-02 | 北京闻亭泰科技术发展有限公司 | 3D prints laser processing module based on digital light processing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006072149A (en) * | 2004-09-03 | 2006-03-16 | Fujitsu General Ltd | Liquid crystal projector apparatus |
| CN101937133A (en) * | 2009-06-26 | 2011-01-05 | 松下电器产业株式会社 | projection display device |
| CN101995761A (en) * | 2009-08-07 | 2011-03-30 | Jds尤尼弗思公司 | Multi-segment optical retarder for creating 3D images |
| CN102608747A (en) * | 2011-01-21 | 2012-07-25 | 精工爱普生株式会社 | Polarization conversion device, polarization conversion unit, and projection type video apparatus |
| JP5104214B2 (en) * | 2007-02-14 | 2012-12-19 | セイコーエプソン株式会社 | projector |
| JP2013120328A (en) * | 2011-12-08 | 2013-06-17 | Sanyo Electric Co Ltd | Projection-type image display system, 3d glasses, and rotating plate |
-
2013
- 2013-10-30 CN CN201310530521.3A patent/CN103543588B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006072149A (en) * | 2004-09-03 | 2006-03-16 | Fujitsu General Ltd | Liquid crystal projector apparatus |
| JP5104214B2 (en) * | 2007-02-14 | 2012-12-19 | セイコーエプソン株式会社 | projector |
| CN101937133A (en) * | 2009-06-26 | 2011-01-05 | 松下电器产业株式会社 | projection display device |
| CN101995761A (en) * | 2009-08-07 | 2011-03-30 | Jds尤尼弗思公司 | Multi-segment optical retarder for creating 3D images |
| CN102608747A (en) * | 2011-01-21 | 2012-07-25 | 精工爱普生株式会社 | Polarization conversion device, polarization conversion unit, and projection type video apparatus |
| JP2013120328A (en) * | 2011-12-08 | 2013-06-17 | Sanyo Electric Co Ltd | Projection-type image display system, 3d glasses, and rotating plate |
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| CN103543588A (en) | 2014-01-29 |
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