CN1585467A - Method and device for heat radiation of digital micro-back projection apparatus - Google Patents
Method and device for heat radiation of digital micro-back projection apparatus Download PDFInfo
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- CN1585467A CN1585467A CN 200410014997 CN200410014997A CN1585467A CN 1585467 A CN1585467 A CN 1585467A CN 200410014997 CN200410014997 CN 200410014997 CN 200410014997 A CN200410014997 A CN 200410014997A CN 1585467 A CN1585467 A CN 1585467A
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Abstract
The method includes following steps: the dedicated heat emission channel is set for optical engine of back projection machine such as: LCD,LCOS,DMD, namely the UHP light and power part; the heat emission channel is sealed to prevent from dust for imager, the imager has sealing space from which air can not flow out.
Description
Technical field
The invention belongs to a kind of broadcast television technique, especially the heat dissipating method of digital micro-back projection's equipment and device.
Background technology
Adopt the back reflection projector of digital engines such as LCD, LCOS, DMD, because image device is little, pixel size is little, dust is very big to the influence of image, simultaneously owing to all adopt the UHP lamp as light source, consequent heat is very big to the influence of optics, and prior art is that general heat dissipating method is:
1), direct heat dissipation type:
Utilizing radiation and heat loss through convection, in Primary Component exposure and the open space, be merely able to be applicable to common CRT rear-projection, is not very high to heat radiation and dustproof requirement, can not adapt to the digital micro-back projection's of a new generation requirement.
2), airtight filtration heat dissipation type:
Utilize the space heat elimination in the complete machine, fan is forced air exchange, the cold air that enters the complete machine cavity is filtered layer by layer, subject matter air pressure in the complete machine cavity when outwards forcing air draft with fan is lower than external atmosphere pressure, the air that is entrained with dust of filtered enters complete machine from the slit of casing, has seriously influenced the dustproof effect.Therefore very high to the seal request of complete machine, complex process, the filter of air inlet needs cleaning in time, avoids stopping up air inlet, causes built-in temperature to raise.
Summary of the invention
The rear-projection equipment that The present invention be directed to the little apparent technology of new digital is in use to heat radiation and dustproof requirement, in complete machine, solve dustproof and heat dissipation problem, solution of the present invention for this reason is: the light engine to the back reflection projector of digital engines such as LCD, LCOS, DMD is UHP lamp and power unit thereof, is provided with special heat radiation wind passage; Heat radiation wind passage prevents dust to the image device place by good sealing, and there is the not confined space of external circulation at the image device place.
1, the major part of light engine heat comes from the UHP lamp, but less demanding to its dustproof, Gu must design special heat radiation wind passage;
2, the image device place requires height to dustproof, but its heat dissipation capacity is limited, and the confined space of external circulation reaches the dustproof purpose by being provided with not.
The beneficial effect of the invention is: the present invention is based on heating characteristics and the heat radiation characteristics of analyzing liquid crystal rear-projection equipment, has proposed this heat dissipating method.Compared with prior art, by being that the major part that main heat produces part comes from the UHP lamp to light engine, improve the rate efficient or the heat that accounts for big composition of total heat dissipation capacity distributed of loosing.The present invention combines airtight and open direct heat radiation, and big portion heat is distributed, and guarantees the requirement of preventing dust of image device place again.Therefore, can in the back reflection projector of digital engines such as LCD, LCOS, DMD, use.
Four, description of drawings
Fig. 1 is an air channel structure schematic diagram of the present invention
Fig. 2 is an air channel of the present invention internal structure schematic diagram
Fig. 3 is a side-looking structural representation of the present invention
Upper air duct 1, lower air duct 2, UHP lamp power supply 3, division board 4 among the figure.
Embodiment
Be isolated in the upper air duct with the main heating part of division board 4, make it in last lower air duct, form the forced ventilation loop by air inlet and the air outlet that has a fan with lamp power supply in the optical machine engine and lamp.Adding upper filter screen, effectively stop dust to enter the air channel into and out of the place, air port.Division board 4 adopts injection molding plates, fibre reinforcement plate, can also be metallic plate, with lamp power supply and lamp heating place better seal material, make as silastic-layer etc., guarantee that it has good sealing.
Practical encapsulant, mode are a lot.Also all inequality at mode, material that different occasions is used.Such as: the gasket type encapsulant comprises that metallic cover pad, high pressure asbestos-packing gasket etc. can be used for body and connect sealing; Foamed products such as EPS, EVA, PE, PU, product of rubber and plastic, and adhesive sticker encapsulant such as gluing block of glass wool can be used for face contact seal.
In the present invention, particularly to seal the big cavity of casing, air channel case.In order to make the casing cavity be in sealing state, on face frame and casing conjunction plane, stick slow resilience (being a kind of rubber expanded material), remedy the slit at conjunction plane place by material distortion itself; Rubber seal with different specification size sticks filling chink with upper and lower back shroud conjunction plane again; For the sealing of air channel casing, adopt encapsulants such as slow resilience too.In the present invention, light engine is cut off in two cavitys, wherein image device partly is arranged in the big seal chamber, and the lamp power unit cuts off in the loop, air channel.Whole air channel adopts medium-density plate to make, and has a style of one's own in wooden housing box body.The divisional plane place in air channel, with light engine and put the clamping plate contact-making surface and stick, shelf is locked with trip bolt with slow resilience, guarantees to cut off the sealing in space.
The metal sheet moulding material can also be adopted in the air channel, and rubber sheet gasket or foamed product are adopted in its sealing place.
Claims (6)
1, digital micro-back projection's heat dissipating method is characterized in that the light engine to the back reflection projector of digital engines such as LCD, LCOS, DMD is UHP lamp and power unit thereof, is provided with special heat radiation wind passage; Heat radiation wind passage prevents dust to the image device place by good sealing, and there is the not confined space of external circulation at the image device place.
2, digital micro-back projection's heat abstractor, it is characterized in that being provided with lower air duct, the main heating part of lamp power supply in the optical machine engine and lamp is isolated in the upper air duct, and air inlet and the air outlet that has a fan form the forced ventilation loop, are adding upper filter screen into and out of the place, air port.
3, digital micro-back projection's heat abstractor as claimed in claim 2 is characterized in that division board 4 adopts injection molding plates, fibre reinforcement plate, can also be metallic plate, is sealing with the silastic-layer encapsulant with lamp power supply and lamp heating place.
4, digital micro-back projection's heat abstractor as claimed in claim 2 is characterized in that the gasket type encapsulant comprises metallic cover pad, high pressure asbestos-packing gasket; Foamed products such as EPS, EVA, PE, PU, product of rubber and plastic, and gluing block of glass wool adhesive sticker encapsulant can be used for face contact seal.
5, digital micro-back projection's heat abstractor as claimed in claim 2, it is characterized in that the casing cavity is in sealing state, stick the slow-elastic rubber expanded material on face frame and casing conjunction plane, the rubber seal with different specification size sticks filling chink with upper and lower back shroud conjunction plane again; For the sealing of air channel casing, adopt encapsulants such as slow resilience too.
6, digital micro-back projection's heat abstractor as claimed in claim 2 is characterized in that the lamp power unit cuts off in the loop, air channel, and whole air channel adopts medium-density plate to make, and has a style of one's own in wooden housing box body; The divisional plane place in air channel, with light engine and put the clamping plate contact-making surface and stick, shelf is locked with trip bolt with slow resilience.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410014997 CN1585467A (en) | 2004-05-25 | 2004-05-25 | Method and device for heat radiation of digital micro-back projection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410014997 CN1585467A (en) | 2004-05-25 | 2004-05-25 | Method and device for heat radiation of digital micro-back projection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1585467A true CN1585467A (en) | 2005-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410014997 Pending CN1585467A (en) | 2004-05-25 | 2004-05-25 | Method and device for heat radiation of digital micro-back projection apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN1585467A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106657956A (en) * | 2016-12-14 | 2017-05-10 | 广东威创视讯科技股份有限公司 | Digital light procession (DLP) box body dustproof heat radiation apparatus |
| CN110286552A (en) * | 2018-03-19 | 2019-09-27 | 青岛海信激光显示股份有限公司 | A kind of projector |
| CN112099238A (en) * | 2020-10-30 | 2020-12-18 | 歌尔光学科技有限公司 | Head-mounted display equipment and front end air cooling heat dissipation structure thereof |
-
2004
- 2004-05-25 CN CN 200410014997 patent/CN1585467A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106657956A (en) * | 2016-12-14 | 2017-05-10 | 广东威创视讯科技股份有限公司 | Digital light procession (DLP) box body dustproof heat radiation apparatus |
| CN110286552A (en) * | 2018-03-19 | 2019-09-27 | 青岛海信激光显示股份有限公司 | A kind of projector |
| CN112099238A (en) * | 2020-10-30 | 2020-12-18 | 歌尔光学科技有限公司 | Head-mounted display equipment and front end air cooling heat dissipation structure thereof |
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