CN202013463U - Lighting device of single chip type liquid crystal projector - Google Patents
Lighting device of single chip type liquid crystal projector Download PDFInfo
- Publication number
- CN202013463U CN202013463U CN201120044223XU CN201120044223U CN202013463U CN 202013463 U CN202013463 U CN 202013463U CN 201120044223X U CN201120044223X U CN 201120044223XU CN 201120044223 U CN201120044223 U CN 201120044223U CN 202013463 U CN202013463 U CN 202013463U
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- liquid crystal
- light
- lighting device
- light source
- crystal projector
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Abstract
The utility model discloses a lighting device of a single chip type liquid crystal projector, in which a reflective polaroid sheet having an angle equal to an incident polaroid film is installed in front of the incident polaroid film, and a square conical reflection tube composed of four trapezoidal reflectors is installed between the reflective polaroid sheet and a light source; a small opening end of the reflection tube faces to the light source; a big opening end faces to the reflective polaroid sheet; a relatively closed chamber is formed between a substrate and the reflective polaroid sheet; the reflective polaroid sheet could reflect the light which is unable to pass through the incident polaroid film and enable the light to be scattered to the natural light after multiple reflection and transmission in the chamber; the natural light emits once more to the big opening of the reflection tube for partial transmission and partial reflection; and after such recycle, the transmissive light is greatly increased and the light utilization ratio is enhanced.
Description
Technical field
The utility model relates to the one chip liquid crystal projector, particularly the lighting device of one chip liquid crystal projector.
Background technology
One chip crystal projection technology is a kind of prior art of maturation, the surface of its liquid crystal display is pasted with the light inlet polarizing coating, during light source (natural light) irradiating liquid crystal screen, have only the polarized light of certain direction to pass through, other light then can not pass through, and intransitable light can be absorbed by the light inlet polarizing coating on the liquid crystal display, and the light inlet polarizing coating is heated up, liquid crystal display is also heated up thereupon, to bringing harmful effect in serviceable life of liquid crystal display.
Chinese patent ZL200820162491.X discloses a kind of heat sink of liquid crystal projector liquid crystal display, by additionally increasing reflective polarizer in the liquid crystal display front side, can not reflect away by the light of liquid crystal display by reflective polarizer, reduce the heat that liquid crystal display absorbs, thereby reduce the temperature of liquid crystal display, prolong its serviceable life.Yet it can not directly be reflected by the light of liquid crystal display allows expense fall, and the utilization factor of light is low, not environmental protection.
In addition, in the projector of some LCOS, not only reflective polarizer is set, also the reflecting metal face is set, repeatedly reflect between reflective polarizer and reflecting metal face by light and improve light utilization at the light source bottom in the light source front side.But, not forming a relative airtight cavity between the metal covering of its polaroid and LED bottom, very most light can spill in reflection process from the side, and the raising of its light utilization is very limited, and 8-10% is only arranged, and is still not ideal enough.
Summary of the invention
The purpose of this utility model is to provide a kind of lighting device that can significantly improve the one chip liquid crystal projector of light utilization.
The lighting device of one chip liquid crystal projector described in the utility model, comprise liquid crystal display, the Fresnel Lenses of liquid crystal display side, the substrate of light source and installation light source, liquid crystal display light inlet side has the light inlet polarizing coating, be equipped with and the identical reflection type polarizer of light inlet polarizing coating angle before the light inlet polarizing coating, the reflective tube of the square taper of being made up of four trapezoidal catoptrons is installed between reflection type polarizer and the light source, the little open end of reflective tube is to light source, and closely around light source, big open end forms the cavity of a relative closure to reflection type polarizer between substrate and reflection type polarizer.
The lighting device of one chip liquid crystal projector described in the utility model, at first, the reflective tube of being made up of four catoptrons is installed between light source and reflection type polarizer, the light portion of light source directly penetrates the big opening of reflective tube, another part also penetrates from big opening through four trapezoidal mirror reflects, and its all light all can penetrate through big opening, avoid the loss of incident ray, improved the utilization factor of light.Secondly, the reflection type polarizer of big open side is identical with the polarization angle of the light inlet polarizing coating that liquid crystal display is pasted, when the light that light source penetrates ran into reflection type polarizer at big opening part, the light of identical polarization direction can pass reflection type polarizer in the light, and passes liquid crystal display thereafter; The light of different polarization direction is reflected back toward reflective tube in the light, through repeatedly reflection, transmission, polarized light is broken up, again become natural light, penetrate once more to the big opening of reflective tube, the reflection type polaroid sees through the light of a part once more, antireflection part light, so circulation, because light interreflection in an airtight relatively cavity, its light leak is seldom, except that part light is absorbed by LED packaging plastic, substrate, all the other light all can see through liquid crystal display, and it has significantly increased the light that sees through, and has greatly improved the utilization factor of light.Through experiment, record its raising liquid crystal display brightness and can reach 25-30%.
Description of drawings
Fig. 1 is a kind of structural representation of lighting device of one chip liquid crystal projector;
Fig. 2 is the partial schematic diagram of the light source of illumination device side of one chip liquid crystal projector;
Fig. 3 is the structural representation of the lighting device of one chip liquid crystal projector;
Fig. 4 is a kind of structural representation of lighting device of one chip liquid crystal projector.
Embodiment
A kind of lighting device of one chip liquid crystal projector, as Fig. 1, comprise liquid crystal display 2 and light source 4, light source is a plurality of led chips that are encapsulated on the substrate, the liquid crystal display side is equipped with Fresnel Lenses 3, Fresnel Lenses 3 can be installed in front side, the rear side of liquid crystal display, or is installed in the both sides, front and back of liquid crystal display simultaneously; Liquid crystal display 2 light inlet sides are pasted with the light inlet polarizing coating.The liquid crystal display front side also is equipped with the identical reflection type polarizer of pasting with the liquid crystal display surface 8 of light inlet polarizing coating angle, the reflective tube 5 of the square taper of being made up of four trapezoidal catoptrons is installed between reflection type polarizer 8 and the light source 4, the little openend of reflective tube closely covers on outside the led chip group on the substrate 7 of light source 4, offset with the encapsulating face on the substrate 7, its big openend and reflection type polarizer 8 offset, at reflection type polarizer 8 and 7 cavitys that form a relative closure of substrate.
The little openend of reflective tube 5 offsets with the substrate of a plurality of led chips of encapsulation, and the light that led chip sends has part and spills from the side of packed part, and the utilization factor of light is exerted an influence.Take place for fear of this situation,, around the encapsulating face that can be on substrate square frame 9 be set as Fig. 2, the madial wall of square frame be can reflection ray reflective surface, connect with the madial wall of the little openend of reflecting drum.Can be by the square frame madial wall with the reflection of the light of led chip directive side, thus the utilization factor of light further improved.
Above-mentioned situation, at the madial wall of the madial wall of reflective tube 5 little openends and square frame 9 place that connects, unavoidably can there be the gap, the light that the LDE chip sends has the possibility that spills from gap location, take place for fear of this situation, the madial wall of described square frame is a reflective surface 10, and madial wall extends upward the edge of a knife 11 structures simultaneously, and knife-edge extend into the little openend of reflective tube 5 slightly.It makes and forms a complete airtight optical reflection chamber between substrate, square frame madial wall, reflective tube, the reflection type polarizer, makes the utilization factor of light higher.
The square frame madial wall can be provided with step 12, is used for the welding of led chip extension line, as figure.
Scattering sheet can be installed as astigmatic device in the surface of described led chip group, after light incides on the scattering sheet, can be broken up by scattering sheet and is natural light.The packaging plastic of led chip group also can be as astigmatic device.
Because reflective tube 5 sides of being taper, the area of its little openend is less, and the negligible amounts of the led chip that can pack into brings restriction to the brightness of liquid crystal display.In order to reduce this influence, the bottom of reflective tube can be provided with the taper light-guiding shade 13 of downward enlarging, and as Fig. 3, the bottom of light-guiding shade 13 is centered around outside the led chip group that is encapsulated on the substrate 7, and its madial wall is a reflective surface.Because the area of light-guiding shade lower end wants big than the little opening of reflective tube, therefore, can hold more LDE lamp as light source, can better guarantee the brightness of liquid crystal display.
In addition, the quantity of the little open end LDE lamp in reflective tube bottom also is subjected to the influence of substrate heat radiation, and led chip density can not be too high on the substrate, and density is too high may to damage led chip because of heat can't in time shed.In order to improve the layout density of basic onboard led etc., as Fig. 4, can the soaking plate heating radiator 14 that be used to dispel the heat be installed at the back of substrate, the heat-absorbent surface hot plate of soaking plate heating radiator and the back side of substrate 7 fit tightly.Soaking plate heating radiator by the installation of substrate back, can take away the heat that led chip produces fast, the heat that significantly improves substrate distributes speed, thereby can improve the layout density of led chip on the substrate, under the restriction of limited little openend area, can arrange more led chip, thereby make lighting device provide more irradiation light, thereby can increase the brightness of liquid crystal display to liquid crystal display.Substrate also can with soaking plate heating radiator one, substrate is the part of soaking plate heating radiator heat-absorbent surface, it can further improve radiating efficiency.
Claims (10)
1. the lighting device of an one chip liquid crystal projector, comprise liquid crystal display, the Fresnel Lenses of liquid crystal display side, the substrate of light source and installation light source, liquid crystal display light inlet side has the light inlet polarizing coating, it is characterized in that: be equipped with and the identical reflection type polarizer of light inlet polarizing coating angle before the light inlet polarizing coating, the reflective tube of the square taper of being made up of four trapezoidal catoptrons is installed between reflection type polarizer and the light source, the little open end of reflective tube is to light source, and closely around light source, big open end forms the cavity of a relative closure to reflection type polarizer between substrate and reflection type polarizer.
2. the lighting device of one chip liquid crystal projector according to claim 1 is characterized in that: described light source is that the led chip group that a plurality of led chips are formed is installed.
3. the lighting device of one chip liquid crystal projector according to claim 1 is characterized in that: the bottom of reflective tube is provided with the taper light-guiding shade of downward enlarging, and the light-guiding shade madial wall is a reflective surface.
4. the lighting device of one chip liquid crystal projector according to claim 1 is characterized in that: around the light source square frame is set, the madial wall of square frame is a reflective surface, connects with the madial wall of the little openend of reflective tube.
5. the lighting device of one chip liquid crystal projector according to claim 1 is characterized in that: real estate is a reflective mirror to the surface of light source.
6. the lighting device of one chip liquid crystal projector according to claim 1 is characterized in that: polarized light also is installed in the described cavity breaks up astigmatic device into natural light.
7. the lighting device of one chip liquid crystal projector according to claim 4 is characterized in that: the madial wall of square frame frame extends upward edge of a knife structure, and knife-edge extend into the little openend of reflective tube slightly.
8. the lighting device of one chip liquid crystal projector according to claim 4 is characterized in that: the square frame madial wall is provided with ledge structure.
9. the lighting device of one chip liquid crystal projector according to claim 6 is characterized in that: described astigmatic device is scattering sheet or is made of the packaging plastic that light source is encapsulated in substrate surface.
10. according to the lighting device of any one described one chip liquid crystal projector among the claim 1-9, it is characterized in that: the soaking plate heating radiator is installed at the back side of substrate, and substrate fits tightly on the heat-absorbent surface of soaking plate heating radiator; Or substrate is exactly the heat-absorbent surface of soaking plate heating radiator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120044223XU CN202013463U (en) | 2011-02-22 | 2011-02-22 | Lighting device of single chip type liquid crystal projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120044223XU CN202013463U (en) | 2011-02-22 | 2011-02-22 | Lighting device of single chip type liquid crystal projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202013463U true CN202013463U (en) | 2011-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120044223XU Expired - Fee Related CN202013463U (en) | 2011-02-22 | 2011-02-22 | Lighting device of single chip type liquid crystal projector |
Country Status (1)
| Country | Link |
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| CN (1) | CN202013463U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495521A (en) * | 2011-12-08 | 2012-06-13 | 四川省雷克赛恩电子科技有限公司 | Polarized-light 3D (three-dimension) projector with single lens and double LCDs (Liquid Crystal Display) |
| CN103470992A (en) * | 2013-09-27 | 2013-12-25 | 中国科学院半导体研究所 | Projection illuminating system |
| CN103486474A (en) * | 2013-09-27 | 2014-01-01 | 中国科学院半导体研究所 | Spot adjustable indoor projection illuminating system |
| CN109188834A (en) * | 2018-09-03 | 2019-01-11 | 深圳小淼科技有限公司 | A kind of projector |
| CN109690370A (en) * | 2016-07-22 | 2019-04-26 | 法雷奥舒适驾驶助手公司 | Video generation device and head-up display |
| CN110268312A (en) * | 2017-12-14 | 2019-09-20 | Jvc建伍株式会社 | Liquid crystal illumination device, head-up display and means of illumination |
-
2011
- 2011-02-22 CN CN201120044223XU patent/CN202013463U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495521A (en) * | 2011-12-08 | 2012-06-13 | 四川省雷克赛恩电子科技有限公司 | Polarized-light 3D (three-dimension) projector with single lens and double LCDs (Liquid Crystal Display) |
| CN103470992A (en) * | 2013-09-27 | 2013-12-25 | 中国科学院半导体研究所 | Projection illuminating system |
| CN103486474A (en) * | 2013-09-27 | 2014-01-01 | 中国科学院半导体研究所 | Spot adjustable indoor projection illuminating system |
| CN103470992B (en) * | 2013-09-27 | 2016-03-23 | 中国科学院半导体研究所 | A kind of projection illuminator |
| CN103486474B (en) * | 2013-09-27 | 2016-05-18 | 中国科学院半导体研究所 | The indoor projection type illuminator that a kind of hot spot is adjustable |
| CN109690370A (en) * | 2016-07-22 | 2019-04-26 | 法雷奥舒适驾驶助手公司 | Video generation device and head-up display |
| CN110268312A (en) * | 2017-12-14 | 2019-09-20 | Jvc建伍株式会社 | Liquid crystal illumination device, head-up display and means of illumination |
| CN110268312B (en) * | 2017-12-14 | 2022-02-11 | Jvc建伍株式会社 | Liquid crystal lighting device, head-up display and lighting method |
| CN109188834A (en) * | 2018-09-03 | 2019-01-11 | 深圳小淼科技有限公司 | A kind of projector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111019 Termination date: 20140222 |