CN201259595Y - Temperature reduction device for LCD projector liquid crystal screen - Google Patents
Temperature reduction device for LCD projector liquid crystal screen Download PDFInfo
- Publication number
- CN201259595Y CN201259595Y CNU200820162491XU CN200820162491U CN201259595Y CN 201259595 Y CN201259595 Y CN 201259595Y CN U200820162491X U CNU200820162491X U CN U200820162491XU CN 200820162491 U CN200820162491 U CN 200820162491U CN 201259595 Y CN201259595 Y CN 201259595Y
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- Prior art keywords
- liquid crystal
- crystal display
- fresnel mirror
- polaroid
- absorption
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Abstract
The utility model discloses a cooling device for a LCD screen of a LCD projector; in the utility model, a reflective polaroid sheet is adhered on one side of a LCD screen close to a front Fresnel lens, so as to reflect the ray parallel to the incidence direction; thereby, the temperature of the LCD screen is greatly reduced.
Description
Technical field
The utility model relates to a kind of heat sink of liquid crystal projector liquid crystal display.
Background technology
Liquid crystal projector is in light weight because of it, volume is few, the fields such as teaching, meeting, commercial affairs, advertisement recreational place that are widely used in easy for installation, has progressively entered family market.In each parts of liquid crystal projector, liquid crystal display be the most expensive also be the core component of " fragility ", its life-span directly influences the life-span of whole projector.And the prerequisite of projector's work is to use the strong illumination liquid crystal display, and the heat of removing radiation can improve outside the temperature of liquid crystal display, and another reason is because the extinction effect of polaroid causes.At present the common liquid crystals screen is gone up the polaroid of pasting and is the absorption-type polaroid, and the principle that its produces polarized light is to absorb wherein a certain polarized component in the natural light, and allows the light transmission of another kind of polarized component.Therefore when unpolarized natural light irradiation liquid crystal board, polaroid near lamp source one side can further improve the temperature of liquid crystal display, thereby make liquid crystal display more fragile because absorb polarized light energy over half, reduce the life-span of projector, same brightness also can't be improved.
At present to the more existing solutions of the heat of high light radiation, as installing heat-protecting glass additional in preceding Fresnel mirror front, most of infrared light is reflected, do not enter on the liquid crystal display, but the heat absorption problem to polaroid does not still solve, and does not fundamentally solve the temperature problem of liquid crystal display.
Summary of the invention
The purpose of this utility model is to provide a kind of device that solves the cooling measure of liquid crystal projector liquid crystal display, this device utilization changes the characteristic of the polaroid that absorbs heat, the spectrum that produces heat is reflected away by reflex, the temperature on the liquid crystal display is reduced greatly.
The heat sink of a kind of liquid crystal projector liquid crystal display that the utility model provides, adopt following technology to realize:
In the utility model, a kind of cooling measure of novel liquid crystal projecting camera LCD screen posts absorption-type polaroid 5 in its side near back Fresnel mirror 3 on the liquid crystal display 2, posts reflection type polarizer 4 in a liquid crystal display 2 and a side of preceding Fresnel mirror 1.Between reflection type polarizer 4 and the preceding Fresnel mirror 1, all leave the clearance between absorption-type polaroid 5 and the back Fresnel mirror 3.
When using liquid crystal projector of the present utility model to work, the high light that sends from lamp through reflector, condenser after, successively by the preceding Fresnel mirror in the utility model, reflection type polarizer, liquid crystal display, absorption-type polaroid, back Fresnel mirror, at last by projection lens projects to screen.The polaroid that wherein is affixed on the reflection-type on the liquid crystal display is being born the effect that produces polarized light, and it can only make the light perpendicular to its transmission direction pass through, and the light that is parallel to its transmission direction then is reflected.Because the reflex of polaroid, the heat major part of the luminous energy generation that is parallel to its transmission direction originally has been reflected, so with former absorption-type polaroid because a large amount of absorb luminous energy and produce heat and all concentrate on and compare on the liquid crystal display, the temperature of liquid crystal display is reduced greatly, thereby make the life-span of liquid crystal display longer.
The heat sink of a kind of liquid crystal projector liquid crystal display that the utility model also can provide, adopt following technology to realize:
A kind of cooling measure of novel liquid crystal projecting camera LCD screen, only post absorption-type polaroid 5 on the liquid crystal display 2 in its side near back Fresnel mirror 3, the glass 6 of high permeability is installed between liquid crystal display 2 and preceding Fresnel mirror 1, posts reflection type polarizer 4 in a side of high permeability glass 6.Before Fresnel mirror 1, post the high permeability glass 6 of reflection type polarizer, single face posts between the liquid crystal display 2 of absorption-type polaroid 5 and the back Fresnel mirror 3 and all leaves the clearance.
When using liquid crystal projector of the present utility model to work, the high light that sends from lamp through reflector, condenser after, glass, reflection type polarizer, liquid crystal display, absorption-type polaroid, back Fresnel mirror by the preceding Fresnel mirror in the utility model, high permeability successively, at last by projection lens projects to screen.The polaroid that wherein is affixed on the reflection-type on glass of high permeability is being born the effect that produces polarized light, and it can only make the light perpendicular to its transmission direction pass through, and the light that is parallel to its transmission direction then is reflected.Because the reflex of polaroid, the heat major part of the luminous energy generation that is parallel to its transmission direction originally has been reflected, so with former polaroid because a large amount of absorb luminous energy and produce heat and all concentrate on and compare on the liquid crystal display, the temperature of liquid crystal display is reduced greatly, thereby make the life-span of liquid crystal display longer.
The utlity model has following advantage:
Owing to adopted reflection type polarizer, make that a polarized component is reflected in the incident light, and another polarized component is passed through, thereby reduced the extinction characteristic of polaroid, be that the polaroid temperature reduces, thereby reduced the temperature of liquid crystal display, reduced in the projector cooling requirement liquid crystal display and polaroid.
The life-span of liquid crystal display is the key component in decision whole projector life-span, so adopt the life-span of liquid crystal projector of the present utility model can be longer.
Description of drawings
Fig. 1 is the structural representation of embodiment one of the present utility model;
Fig. 2 is applied to the synoptic diagram of projector for embodiment one of the present utility model;
Fig. 3 is the structural representation of embodiment two of the present utility model;
Fig. 4 is applied to the synoptic diagram of projector for embodiment two of the present utility model;
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
Embodiment one
As shown in Figure 1, post absorption-type polaroid 5 in its side on the liquid crystal display 2, post the polaroid 4 of reflection-type in a liquid crystal display 2 and a side of preceding Fresnel mirror 1 near back Fresnel mirror 3.
Reflection type polarizer can adopt commercially available organic film type reflective polarizers, or adopts the reflective polarizers of metal grating type.
As shown in Figure 2, when using liquid crystal projector of the present utility model to work, the high light that sends from lamp 22 through reflector 21, condenser 23 after, by the preceding Fresnel mirror 1 in the utility model 20, reflection type polarizer 4, liquid crystal display 2, absorption-type polaroid 5, back Fresnel mirror 3, project on the screen by projection lens 24 at last successively.The polaroid 4 that wherein is affixed on the reflection-type on the liquid crystal display 2 is being born the effect that produces polarized light, and it can only make the light perpendicular to its transmission direction pass through, and the light that is parallel to its transmission direction then is reflected.Because the reflex of polaroid, the heat major part of the luminous energy generation that is parallel to its transmission direction originally has been reflected, so with former common polaroid because a large amount of absorb luminous energy and produce heat and all concentrate on and compare on the liquid crystal display, the temperature of liquid crystal display is reduced greatly, thereby make the life-span of liquid crystal display longer.
Embodiment two
As shown in Figure 3, only post absorption-type polaroid 5 in its side near back Fresnel mirror 3 on the liquid crystal display 2, the glass that high permeability is installed 6 between liquid crystal display 2 and preceding Fresnel 1 posts the polaroid 4 of reflection-type in a side of high permeability glass.
As shown in Figure 3, when using liquid crystal projector of the present utility model to work, the high light that sends from lamp 22 through reflector 21, condenser 23 after, by glass 6, reflection type polarizer 4, liquid crystal display 2, absorption-type polaroid 5, the back Fresnel mirror 3 of the preceding Fresnel mirror 1 in the utility model 30, high permeability, project on the screen by projection lens 24 at last successively.The reflection type polarizer 4 that wherein is affixed on the glass 6 of high permeability is being born the effect that produces polarized light, and it can only make the light perpendicular to its transmission direction pass through, and the light that is parallel to its transmission direction then is reflected.Because the reflex of polaroid, the heat major part of the luminous energy generation that is parallel to its transmission direction originally has been reflected, so with former polaroid because a large amount of absorb luminous energy and produce heat and all concentrate on and compare on the liquid crystal display, the temperature of liquid crystal display is reduced greatly, thereby make the life-span of liquid crystal display longer.
Claims (4)
1. the heat sink of novel liquid crystal projecting camera LCD screen, it is characterized in that: liquid crystal display (2) is gone up in its side near back Fresnel mirror (3) and is posted absorption-type polaroid (5), posts reflection type polarizer (4) in a liquid crystal display (2) and a side of preceding Fresnel mirror (1).
2. the heat sink of liquid crystal projector liquid crystal display according to claim 1 is characterized in that: between reflection type polarizer (4) and the preceding Fresnel mirror (1), all leave the clearance between absorption-type polaroid (5) and back Fresnel mirror (3).
3. the heat sink of novel liquid crystal projecting camera LCD screen, it is characterized in that: liquid crystal display (2) is only gone up and is posted absorption-type polaroid (5) in its side near back Fresnel mirror (3), the glass (6) of high permeability is installed between liquid crystal display (2) and preceding Fresnel mirror (1), posts reflection type polarizer (4) in a side of high permeability glass (6).
4. the heat sink of liquid crystal projector liquid crystal display according to claim 3, it is characterized in that: preceding Fresnel mirror (1), post the high permeability glass (6) of reflection type polarizer, single face posts between the liquid crystal display (2) of absorption-type polaroid (5) and the back Fresnel mirror (3) and all leaves the clearance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820162491XU CN201259595Y (en) | 2008-08-21 | 2008-08-21 | Temperature reduction device for LCD projector liquid crystal screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820162491XU CN201259595Y (en) | 2008-08-21 | 2008-08-21 | Temperature reduction device for LCD projector liquid crystal screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201259595Y true CN201259595Y (en) | 2009-06-17 |
Family
ID=40773833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820162491XU Expired - Fee Related CN201259595Y (en) | 2008-08-21 | 2008-08-21 | Temperature reduction device for LCD projector liquid crystal screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201259595Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109917609A (en) * | 2019-03-21 | 2019-06-21 | 屏丽科技成都有限责任公司 | A kind of liquid crystal projection apparatus that screen temperature is effectively reduced |
-
2008
- 2008-08-21 CN CNU200820162491XU patent/CN201259595Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109917609A (en) * | 2019-03-21 | 2019-06-21 | 屏丽科技成都有限责任公司 | A kind of liquid crystal projection apparatus that screen temperature is effectively reduced |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HANGZHOU LUMEON CYBER OPTO-ELECTRONICAL TECHNOLOGY Free format text: FORMER NAME: SANHUAKETE PHOTOELECTRIC CO LTD, HANGZHOU |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Hangzhou City, Zhejiang Province, 310030 Xihu District three Town Xiyuan four Road No. 2 Building No. 1 1 floor Patentee after: Hangzhou Cyber Opto-Electronic Technology Co., Ltd. Address before: Hangzhou City, Zhejiang Province, 310030 Xihu District three Town Xiyuan four Road No. 2 Building No. 1 1 floor Patentee before: Hangzhou Cyber Opto-Electronic Technology Co., Ltd. |
|
| DD01 | Delivery of document by public notice |
Addressee: Hangzhou Cyber Opto-Electronic Technology Co., Ltd. Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Hangzhou Cyber Opto-Electronic Technology Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090617 Termination date: 20140821 |
|
| EXPY | Termination of patent right or utility model |