CN103543588A - Projector and optical system thereof - Google Patents
Projector and optical system thereof Download PDFInfo
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- CN103543588A CN103543588A CN201310530521.3A CN201310530521A CN103543588A CN 103543588 A CN103543588 A CN 103543588A CN 201310530521 A CN201310530521 A CN 201310530521A CN 103543588 A CN103543588 A CN 103543588A
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Abstract
The invention relates to a projector and an optical system thereof. The optical system of the projector comprises a light source, a liquid crystal processor, a light combining device and a polarizer, wherein the light source is arranged in a machine shell of the projector, and the polarizer is rotationally arranged in the machine shell of the projector; light emitted by the light source enters the liquid crystal processor, the liquid crystal processor processes the light to form processed light, the processed light enters the light combining device, the light combining device combines the processed light to form combined light, the combined light enters the polarizer, and the rest of the combined light is projected to a projection screen after the polarizer absorbs part of the combined light. The rotary polarizer absorbs part of the combined light combined through the light combining device, the polarizer can continuously change positions illuminated by the light when absorbing the light, and therefore the projector is heated evenly, local overhigh temperature caused by local illumination is prevented, and burnout is effectively prevented.
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 is used more and more extensive, and people are also more and more higher to the requirement of projector's quality.The most important thing is the serviceable life of projector, people, when using projector, often do not wish to go wrong.A Polarizer that the place that is easy to go wrong is projector of projector.In the optical system of projector, that according to the direction of vibration of light, light source is sent is divided into P light and S light.Wherein, P light and S light respectively account for half.P light can not pass through Polarizer, and when P light can be absorbed by Polarizer during by Polarizer, and S light can freely 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 to S light, when pure S light passes through liquid crystal panel, liquid crystal panel can change into P light unwanted S light, then pass through Polarizer, Polarizer falls the P light absorption in light, and S light can freely pass through, and finally on projection screen, casts needed image.
In sum, the Polarizer in projector is for absorbing the element of unnecessary P light, but Polarizer is heat energy by light energy conversion after absorbing P light, along with the growth of time, the temperature of Polarizer can be more and more higher, if while surpassing certain value, Polarizer can be burned, and projector loses projecting function.Under many circumstances, projector can not normally be used because Polarizer burns out.The reason of Polarizer excess Temperature, except heat radiation not in time, also has an even more important reason to be, 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 the setting of Polarizer to transform to prevent that Polarizer from burning out.
Summary of the invention
Based on this, be necessary for a kind of optical system that can effectively prevent the projector that Polarizer burns out is provided.
Further, provide a kind of projector that uses the optical system of above-mentioned projector.
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 is processed the light after formation processing to described light, and the light after described processing is incident in described light compositing device, the light of described light compositing device after to described processing synthesizes and forms synthetic light, and described synthetic light is incident in described Polarizer, after synthetic light, remaining described synthetic light is projected to projection screen described in described Polarizer absorption portion.
In an embodiment, also comprise the first spectroscope, the second spectroscope, the first catoptron, the second catoptron and the 3rd catoptron therein, 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 the first spectroscope sends described light source is divided into the first color of light and the second color of light, and described the first catoptron reflexes to described the first color of light in described the first liquid crystal panel;
Described the second spectroscope is divided into the 3rd color of light and the 4th color of light by described the second color of light, and described the 3rd color of light is incident in described the second liquid crystal panel;
Described the second catoptron and the 3rd catoptron reflect described the 4th color of light successively, and described the 4th color of light is entered in described the 3rd liquid crystal panel;
Described the first liquid crystal panel, the second liquid crystal panel and the 3rd liquid crystal panel respectively to described the first color of light, the 3rd color of light and the 4th color of light process the first color of light after formation processing, the 3rd color of light after processing and process after the 4th color of light, three color of light of described light compositing device by the first color of light after described processing, after processing and process after the 4th color of light synthesize synthetic light, described synthetic light is by the projection screen that is projected to after the partially absorbing of described Polarizer.
In an embodiment, described Polarizer comprises substrate and is arranged at the light polarizing film on described substrate surface therein.
In an embodiment, described light polarizing film is circular light polarizing film or annular light polarizing film therein.
In an embodiment, described substrate is glass substrate therein.
In an embodiment, the thickness of described glass substrate is 1～2 millimeter therein.
In an embodiment, described the first spectroscope is blue light splitting mirror therein, and described the second spectroscope is green spectroscope.
Therein in an embodiment, described the first spectroscope, the second spectroscope, the first catoptron are parallel with the second catoptron, and the acute angle that described the first catoptron becomes with the 3rd catoptron is 45 °.
In an embodiment, also comprise motor therein, described motor is arranged in the casing of described projector, and the motor shaft of described motor is connected and makes described Polarizer rotatable with described Polarizer.
A kind of projector that uses the optical system of above-mentioned projector.
The optical system of above-mentioned projector is used a rotating Polarizer to partially absorb through the synthetic synthetic light of light compositing device, because Polarizer is rotatable, make it in the absorption light time, can constantly convert the position being irradiated by light, thereby can thermally equivalent, prevent part to be irradiated by light and cause local temperature too high, effectively preventing from burning out.Therefore, be conducive to improve to use serviceable life of projector of the optical system of this projector.
Accompanying drawing explanation
Fig. 1 is the structural representation of 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;
Fig. 3 is the light path schematic diagram of the optical system of the projector shown in Fig. 1.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.A lot of details have been set forth in the following description so that fully understand the present invention.But the present invention can implement to be much different from alternate manner described here, and those skilled in the art can do similar improvement without prejudice to intension of the present invention in the situation that, so the present invention is not subject to the restriction of following public concrete enforcement.
Refer to Fig. 1, the optical system 100 of the projector of an embodiment, comprises light source 10, liquid crystal processor 20, light compositing device 30 and a Polarizer 40.
The light that light source 10 sends enters in liquid crystal processor 20, the light that light source 10 is sent of liquid crystal processor 20 is processed the light after formation processing, and the light after processing is incident to light compositing device 30, light after 30 pairs of processing of light compositing device synthesizes the synthetic light of formation, and will synthesize light and be incident in Polarizer 40, after the synthetic light of Polarizer 40 absorption portion, remaining synthetic light is projected to projection screen.
Through light compositing device 30 synthetic synthetic irradiations, on Polarizer 40, make Polarizer 40 absorption portion through the synthetic light time, Polarizer 40 can quick rotation, make it in the absorption light time, can constantly convert the position being irradiated by light, thereby can thermally equivalent, prevent part to be irradiated by light and cause local temperature too high, effectively preventing from burning out.Therefore, be conducive to improve to use serviceable life of projector of the optical system 100 of this projector.
Light compositing device 30 is preferably and closes look prism.
The optical system 100 that refers to Tu2，Gai projector also comprises motor 60.Motor 60 is arranged in the casing of projector, and the motor shaft 62 of motor 60 is connected to drive Polarizer 40 to rotate with Polarizer 40.
Preferably, light source 10 is white light source.The optical system 100 of projector also comprises the first spectroscope 51, the second spectroscope 52, the first catoptron 53, the second catoptron 54 and the 3rd catoptron 55.
The first spectroscope 51, the second spectroscope 52, the first catoptron 53, the second catoptron 54 and the 3rd catoptron 55 rational deployment so that 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 through the first spectroscope 51 and the second color of light 103, the first catoptrons 53 reflex to the first color of light 102 in the first liquid crystal panel 22.
The second spectroscope 52 is divided into the 3rd color of light 104 and the 4th color of light 105 by the second color of light 103, and the 3rd color of light 104 is incident in the second liquid crystal panel 24.
The 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.
The first color of light 102 enters light synthesizer 30 after the processing of the first liquid crystal panel 22, the 3rd color pipe 104 enters light synthesizer 30, the four color of light 105 and after the processing of the 3rd liquid crystal panel 26, enters light synthesizer 30 after the processing of the second liquid crystal panel 24.
The first color of light 102 after processing, the 3rd color of light 104 after processing and process after the 4th color of light 105 through after light compositing device 30 synthetic, form synthetic light 106, synthetic light 106 is incident to Polarizer 40, after synthetic light 106 is partially absorbed by Polarizer 40, is projected to projection screen 200.
Preferably, the first spectroscope 51, the second spectroscope 52, the first catoptron 53 are parallel with the second catoptron 54, and the first catoptron 53 is 45 ° with the acute angle of 55 one-tenth of the 3rd catoptrons, to reduce preferably the loss of light in communication process, improve the utilization factor of light.
Preferably, the first spectroscope 51 is blue light splitting mirror, and the second spectroscope 52 is green spectroscope.The 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.So light path setting, has solved green light because light intensity causes the most by force the problem that temperature is higher, is conducive to extend the serviceable life of projector.
The optical system of traditional projector, all to adopt three Polarizers to 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.The first color of light 102 of processing through the first liquid crystal panel 22 enters light compositing device 30 after first being absorbed P light by Polarizer again, the 3rd color of light 104 of processing through the second liquid crystal panel 24 enters light compositing device 30 after first being absorbed P light by Polarizer again, and the 4th color of light 105 of processing through the 3rd liquid crystal panel 26 enters light compositing device 30 after first being absorbed P light by Polarizer again.
The optical system 100 of the projector of present embodiment is carried out light path improvement, make the synthetic of the first color of light 102, the 3rd color of light 104 and the 4th color of light 105 process light compositing devices 30, then be projected to again projection screen 200 with the unnecessary P light of the disposable absorption of a rotating Polarizer 40.
The optical system 100 of this projector is only used the P light that the disposable absorption of Polarizer 40 is unnecessary, compares with the optical system of traditional projector, can save two Polarizers, makes the more compact structure of projector inside, simplifies the preparation technology of projector.And when work, this Polarizer 40 can rotate, thereby can constantly convert and receive light-struck position, be heated evenly, avoid local overheating to cause excess Temperature and Polarizer 40 is burned, be conducive to improve to use serviceable life of projector of the optical system 100 of this projector.
Please again consult Fig. 2, Polarizer 40 comprises substrate 42 and is arranged at the light polarizing film 44 on substrate 42 surfaces.The electrode axis 62 of motor 60 is connected in the middle part of substrate 42.Light polarizing film 44 is towards the incident direction of synthetic light 106.
Light polarizing film 44 is preferably circular light polarizing film or annular light polarizing film, and when fully guaranteeing that Polarizer 40 rotates, synthetic light 106 all can be irradiated in light polarizing film 44.
Preferably, substrate 42 is glass substrate, so that the optical accuracy of Polarizer 40 and physical strength are better.
Preferably, in order to reduce light loss and to improve heat dispersion, the thickness of glass substrate is 1～2 millimeter.
The optical system 100 of the projector of present embodiment is arranged on the synthetic synthetic light 106 of light compositing device 30 position out by Polarizer 40, by the unwanted P light of the improvement disposable absorption of light path, and by the structure of Polarizer 40 being rationally set and making Polarizer 40 rotatable, can improve local heating's situation of Polarizer 40 and the radiating effect of raising Polarizer 40, can effectively avoid Polarizer 40 to be burned, thereby improve the serviceable life of projector.
Further, provide a kind of projector that uses the optical system 100 of above-mentioned projector, owing to using the optical system 100 of Liao Gai projector, Polarizer 40 can thermally equivalent, avoids local overheating and is burned, and makes the serviceable life of this projector longer.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore 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 (10)
- The optical system of 1.Yi Zhong 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; AndA 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 is processed the light after formation processing to described light, and the light after described processing is incident in described light compositing device, the light of described light compositing device after to described processing synthesizes and forms synthetic light, and described synthetic light is incident in described Polarizer, after synthetic light, remaining described synthetic light is projected to projection screen described in described Polarizer absorption portion.
- 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, whereinThe light that described the first spectroscope sends described light source is divided into the first color of light and the second color of light, and described the first catoptron reflexes to described the first color of light in described the first liquid crystal panel;Described the second spectroscope is divided into the 3rd color of light and the 4th color of light by described the second color of light, and described the 3rd color of light is incident in described the second liquid crystal panel;Described the second catoptron and the 3rd catoptron reflect described the 4th color of light successively, and described the 4th color of light is entered in described the 3rd liquid crystal panel;Described the first liquid crystal panel, the second liquid crystal panel and the 3rd liquid crystal panel respectively to described the first color of light, the 3rd color of light and the 4th color of light process the first color of light after formation processing, the 3rd color of light after processing and process after the 4th color of light, three color of light of described light compositing device by the first color of light after described processing, after processing and process after the 4th color of light synthesize synthetic light, described synthetic light is by the projection screen that is projected to after the partially absorbing of described Polarizer.
- 3. the optical system of projector according to claim 1, is characterized in that, described Polarizer comprises substrate and is arranged at the light polarizing film on described substrate surface.
- 4. the optical system of projector according to claim 3, is characterized in that, described light polarizing film is circular light polarizing film or annular light polarizing film.
- 5. the optical system of projector according to claim 3, is characterized in that, described substrate is glass substrate.
- 6. the optical system of projector according to claim 5, is characterized in that, the thickness of described glass substrate is 1～2 millimeter.
- 7. the optical system of projector according to claim 2, is characterized in that, described the first spectroscope is blue light splitting mirror, and described the second spectroscope is green spectroscope.
- 8. the optical system of projector according to claim 2, is characterized in that, described the first spectroscope, the second spectroscope, the first catoptron are parallel with the second catoptron, and the acute angle that described the first catoptron becomes with the 3rd catoptron is 45 °.
- 9. the optical system of projector according to claim 1, is characterized in that, also comprises motor, and described motor is arranged in the casing of described projector, and the motor shaft of described motor is connected and makes described Polarizer rotatable with described Polarizer.
- 10. the projector of the optical system of the use projector as described in claim 1～9 any one.
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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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| Application Number | Priority Date | Filing Date | Title |
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| CN201310530521.3A CN103543588B (en) | 2013-10-30 | 2013-10-30 | The optical system of projector and projector |
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| CN103543588A true CN103543588A (en) | 2014-01-29 |
| CN103543588B CN103543588B (en) | 2016-02-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| 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 | Projecting display |
| 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 |
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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 | Projecting display |
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
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