CN102411255B - Projector - Google Patents
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- CN102411255B CN102411255B CN201010289300.8A CN201010289300A CN102411255B CN 102411255 B CN102411255 B CN 102411255B CN 201010289300 A CN201010289300 A CN 201010289300A CN 102411255 B CN102411255 B CN 102411255B
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- Prior art keywords
- light source
- light
- projector
- polarization
- module
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- Optical Elements Other Than Lenses (AREA)
- Projection Apparatus (AREA)
Abstract
A kind of projector, it comprises a light source module, a polarization spectro module and a projection lens.Polarization spectro module is relative with light source module just, for receiving the light emitted by light source module.Polarization spectro module comprises one group of polarization Amici prism and a LCOS panel.Polarization Amici prism is become by two isosceles right-angle prism groups, between two surface of contact, be formed with a plane of polarisation, and comprise an incidence surface relative with light source module, first surface, a reflecting surface and with a described reflecting surface relative exiting surface relative with incidence surface.LCOS panel is arranged on described reflecting surface.Described projector comprises a reflection unit further.This reflection unit is arranged on the first surface of polarization Amici prism.Reflection unit is used for the polarized light of the plane of polarisation transmission from polarization Amici prism to reflex to described projection lens.P polarized light can be added on utilization by projector of the present invention, not only increases light utilization, and can improve projection brightness.
Description
Technical field
The present invention relates to a kind of projector.
Background technology
LCOS shadow casting technique is a kind of emerging technology in conjunction with semiconductor technology and liquid crystal display.It has the advantage that volume is little, power consumption is low, and is often embedded in mobile phone and projects.Existing LCOS imaging system generally comprises a light source, one group of polarization Amici prism (PBS), a LCOS panel and projection lens.Light source sends orthogonal S polarized light and P polarized light and enters into this group and polarize after Amici prism, and described S polarized light can be reflexed on this LCOS panel by the plane of polarisation of group polarization Amici prism and modulate, and is then entered described projection lens by after its reflection again.P polarized light then directly can reflect described group of polarization Amici prism through the plane of polarisation of described polarization Amici prism, be not used.That is, the utilization factor of the light sent by light source at most only has 50%, and the light of other 50% is then wasted.Therefore, have impact on the projection brightness of projector.
Summary of the invention
In view of this, be necessary to provide that a kind of volume is little, structure simple and can improve the projector of brightness.
A kind of projector, it comprises a light source module, a polarization spectro module and a projection lens.Described polarization spectro module is relative just with described light source module, for receiving the light emitted by described light source module.Described polarization spectro module comprises one group of polarization Amici prism and a LCOS panel.Described polarization Amici prism is become by two isosceles right-angle prism groups, between two surface of contact, be formed with a plane of polarisation, and comprise an incidence surface relative with described light source module, a first surface relative with described incidence surface, a reflecting surface and an exiting surface relative with described reflecting surface.Described LCOS panel is arranged on described reflecting surface.Described projector comprises a reflection unit further.This reflection unit is arranged on the first surface of described polarization Amici prism.Described reflection unit is used for the polarized light of the plane of polarisation transmission from described polarization Amici prism to reflex to described projection lens.
Relative to prior art, described projector comprises a reflection unit further.This reflection unit is arranged on the first surface of described polarization Amici prism.Described reflection unit is used for the polarized light of the plane of polarisation transmission from described polarization Amici prism to reflex to described projection lens.Therefore, the utilization factor that can improve light in this way not only increases light utilization, and can improve the projection brightness of projector.
Accompanying drawing explanation
The schematic diagram of the projector that Fig. 1 provides for embodiment of the present invention;
Fig. 2 is the using state figure of the projector in Fig. 1.
Main element symbol description
Projector 100
Light source module 10
Polarization spectro module 20
Reflection unit 30
Projection lens 40
Light guide plate 11
Luminescence unit 12
Incidence surface 111
Exiting surface 112
Reflecting surface 113
Red-light source 121
Green-light source 122
Blue light source 123
Polarization Amici prism 21
LCOS panel 22
Fresnel Lenses 200
Plane of polarisation 211
First incidence surface 212
First surface 213
First reflecting surface 214
First exiting surface 215
Clear glass 310
Reflectance coating 320
First right-angle side 31
Second right-angle side 32
Hypotenuse 33
Lens 41
Lens barrel 42
Embodiment
Refer to Fig. 1, the projector 100 that embodiment of the present invention provides, it comprises a light source module 10, polarization spectro module 20, reflection unit 30 and a projection lens 40.
Described light source module 10 comprises a light guide plate 11 and a luminescence unit 12.Described light guide plate 11 is roughly square, it has incidence surface 111, exiting surface 112 and a reflecting surface 113, this reflecting surface 113 is oppositely arranged with this exiting surface 112, and this incidence surface 111 is interconnected with this exiting surface 112 and reflecting surface 113, and this reflecting surface 113 is provided with reflection site.Described luminescence unit 12 is positioned at this incidence surface 111 side, and this luminescence unit 12 comprises a red-light source 121, green-light source 122 and a blue light source 123.Described red-light source 121, green-light source 122 and blue light source 123 are respectively red-light LED, green light LED and blue-ray LED.The light that described luminescence unit 12 sends enters in this light guide plate 11 by this incidence surface 111 respectively, and scattering is there is respectively on this reflecting surface 113, make this three primary colors light be mixed fully thus, this mixing light is penetrated by this exiting surface 112 more afterwards.
Understandable, the relative position relation of the incidence surface 111 of described light guide plate 11, exiting surface 112 and reflecting surface 113 also can change along with the difference of the structure of light guide plate, and, this light source being arranged at incidence surface 111 side of this light guide plate 11 is also not limited to LED light source, its can also be LASER Light Source or other can send the light source of primitive color light, further, the quantity of this three primary colors light source is also not limited to each one, can also arrange multiple light source to increase the reasons such as brightness.
And the employing of described projector 100 has the structure next light emitting source as projector 100 of primitive colours LED in conjunction with light guide plate, by light guide plate 11, three primary colors light is mixed for projector provides light source, thus prior art can be avoided from used complicated optical design, simplify the global design of projector, and greatly reduce the volume of projector 100.
The exiting surface 112 that described polarization spectro module 20 is aligned with this light guide plate 11 is mutually arranged, and it is for receiving the light emitted by the exiting surface 112 of this light guide plate 11.This polarization spectro module 20 comprises one group of polarization Amici prism (Polized Beam Splitter, PBS) 21 and LCOS panel 22.Be irradiated on this LCOS panel 22 after the process of the light entering this polarization spectro module 20 via this polarization Amici prism 21, this LCOS panel 22, for the light be irradiated on it being modulated into the image light with image information and this image light being reflexed to described projection lens 40, finally penetrates imaging by described projection lens 40.
Described polarization Amici prism 21 is become by two 45 degree of isosceles right-angle prism groups, is formed with a plane of polarisation 211 between two surface of contact.Described polarization Amici prism 21 also comprises first incidence surface 212, relative with described light source module 10 first surface 213, first reflecting surface 214 relative with described first incidence surface 212 and first exiting surface 215 relative with described first reflecting surface 214 further.Described LCOS panel 22 is arranged on described first reflecting surface 214.
In present embodiment, in order to better utilize the light emitted by this light guide plate 11, a Fresnel Lenses 200 is also provided with between the exiting surface 112 and this polarization spectro module 20 of this light guide plate, the mixing light penetrated by the exiting surface 112 of this light guide plate 11 enters this polarization spectro module 20 after assembling via this Fresnel Lenses 200, understandable, this Fresnel Lenses 200 can also be the collector lens of other type, can not certainly arrange this collector lens.
Described reflection unit 30 is arranged on the first surface 213 of described polarization Amici prism 21.In present embodiment, described reflection unit 30 comprises a clear glass 310 and a reflectance coating 320.This clear glass 310 is a right-angle triangle, comprises first right-angle side 31,1 second right-angle side 32 and the hypotenuse 33 contacted with described first surface 213.Angle between described first right-angle side 31 and described hypotenuse 33 is 30 degree to 60 degree, preferably, is 45 degree.Described reflectance coating 320 is a silver medal reflectance coating, and it is arranged on described hypotenuse 33.
Described projection lens 40 comprises the lens barrel 42 of two lens 41 and the described lens 41 of collecting.First exiting surface 215 entering light face and described polarization Amici prism 21 of described projection lens 40 is just right.
See also Fig. 2, during use, the light that described light source module 10 sends comprises the orthogonal S polarized light of two bundles and P polarized light.In the present embodiment, the mixing light emitted due to described light guide plate 11 is the light including S polarized light and P polarized light, when this mixing light is after described first incidence surface 212 enters into described polarization spectro module 20, P polarized light directly then can be reflexed on this LCOS panel 22 by this plane of polarisation 211 through this S polarized light of plane of polarisation 211 of this polarization Amici prism 21 and modulate.After P polarized light is converted into S polarized light by described LCOS panel 22, after being reflected by the S polarized light modulated, enter this projection lens 40.And simultaneously, after described first surface 213, the clear glass 310 of described reflection unit 30 is entered to from the P polarized light of plane of polarisation 211 transmission of described polarization Amici prism 21, and via the reflectance coating 320 on described clear glass 310, described P polarized light is reflexed to the first exiting surface 215 of described polarization Amici prism 21, and via the first exiting surface 215, the P polarized light of this reflection is projected to projection lens 40 and projects.That is, because the P polarized light of plane of polarisation 211 transmission from described polarization Amici prism 21 can be reflexed to described projection lens 40 by reflection unit 30, therefore, the utilization factor that can improve light in this way not only increases light utilization, and can improve the projection brightness of projector 100.
Be understandable that, for the person of ordinary skill of the art, other various corresponding change and distortion can be made by technical conceive according to the present invention, and all these change the protection domain that all should belong to the claims in the present invention with distortion.
Claims (9)
1. a projector, it comprises a light source module, a polarization spectro module and a projection lens, described polarization spectro module is relative with described light source module, for receiving the light emitted by described light source module, described polarization spectro module comprises one group of polarization Amici prism and a LCOS panel, described polarization Amici prism is become by two isosceles right-angle prism groups, a plane of polarisation is formed between two surface of contact, and comprise an incidence surface relative with described light source module, a first surface relative with described incidence surface, a reflecting surface and an exiting surface relative with described reflecting surface, described LCOS panel is arranged on described reflecting surface, it is characterized in that: described projector comprises a reflection unit further, this reflection unit is arranged on the first surface of described polarization Amici prism, described reflection unit is used for the polarized light of the plane of polarisation transmission from described polarization Amici prism to reflex to described projection lens.
2. projector as claimed in claim 1, it is characterized in that: described reflection unit comprises a clear glass and a reflectance coating, this clear glass is a right-angle triangle, it comprises first right-angle side contacted with described first surface, one second right-angle side and a hypotenuse, and described reflectance coating is arranged on described hypotenuse.
3. projector as claimed in claim 2, is characterized in that: described reflectance coating is a silver medal reflectance coating.
4. projector as claimed in claim 2, is characterized in that: the angle between described first right-angle side and described hypotenuse is between 30 degree to 60 degree.
5. projector as claimed in claim 1, it is characterized in that: described light source module comprises a light guide plate and a luminescence unit, this light guide plate has incidence surface and exiting surface, this exiting surface is arranged towards this polarization spectro module, this luminescence unit is positioned at the incidence surface side of this light guide plate, this luminescence unit comprises red-light source, blue light source and green-light source, the light that this red-light source, blue light source and green-light source send injects this light guide plate via this incidence surface, then penetrates via this exiting surface and enters this polarization spectro module.
6. projector as claimed in claim 5, it is characterized in that: described projector comprises a collector lens further, this collector lens is located between the exiting surface of this light guide plate and this polarization spectro module, and the mixing light penetrated by this light guide plate exiting surface enters in this polarization spectro module after assembling via this collector lens.
7. projector as claimed in claim 5, it is characterized in that: described light guide plate includes a reflecting surface further, the light injected in this light guide plate by this incidence surface arrives this exiting surface via after this reflective surface.
8. projector as claimed in claim 5, is characterized in that: described red-light source, blue light source and green-light source are respectively red-light LED, blue-ray LED and green light LED.
9. projector as claimed in claim 1, is characterized in that: described projection lens comprises the lens barrel of two lens and the described lens of collecting, and first exiting surface entering light face and described Amici prism of described projection lens is just right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010289300.8A CN102411255B (en) | 2010-09-24 | 2010-09-24 | Projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010289300.8A CN102411255B (en) | 2010-09-24 | 2010-09-24 | Projector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102411255A CN102411255A (en) | 2012-04-11 |
| CN102411255B true CN102411255B (en) | 2015-09-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010289300.8A Expired - Fee Related CN102411255B (en) | 2010-09-24 | 2010-09-24 | Projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102411255B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103006180B (en) * | 2012-12-01 | 2014-10-22 | 清华大学深圳研究生院 | Integrated vein search projection device and system |
| CN109407452A (en) * | 2018-11-16 | 2019-03-01 | 深圳市高格投影科技有限公司 | A kind of LCD projection optical system and projector improving light source utilization rate |
| CN116626932A (en) * | 2023-05-23 | 2023-08-22 | 北京京东方显示技术有限公司 | Display module and projector |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5890786A (en) * | 1994-04-22 | 1999-04-06 | Canon Kabushiki Kaisha | Projection apparatus |
| CN101666962A (en) * | 2009-09-29 | 2010-03-10 | 南阳市海科光电有限责任公司 | Minitype single-chip LCOS projection optical engine |
| CN101681034A (en) * | 2008-04-03 | 2010-03-24 | 松下电器产业株式会社 | Information display |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7589797B2 (en) * | 2005-07-25 | 2009-09-15 | Industrial Technology Research Institute | High efficiency liquid crystal display projection system |
-
2010
- 2010-09-24 CN CN201010289300.8A patent/CN102411255B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5890786A (en) * | 1994-04-22 | 1999-04-06 | Canon Kabushiki Kaisha | Projection apparatus |
| CN101681034A (en) * | 2008-04-03 | 2010-03-24 | 松下电器产业株式会社 | Information display |
| CN101666962A (en) * | 2009-09-29 | 2010-03-10 | 南阳市海科光电有限责任公司 | Minitype single-chip LCOS projection optical engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102411255A (en) | 2012-04-11 |
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