CN101666967B - Device for improving normal operation of DLP projection in low temperature environment and method thereof - Google Patents
Device for improving normal operation of DLP projection in low temperature environment and method thereof Download PDFInfo
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- CN101666967B CN101666967B CN2009103084370A CN200910308437A CN101666967B CN 101666967 B CN101666967 B CN 101666967B CN 2009103084370 A CN2009103084370 A CN 2009103084370A CN 200910308437 A CN200910308437 A CN 200910308437A CN 101666967 B CN101666967 B CN 101666967B
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- dlp
- temperature
- electric heater
- dlp projection
- heater unit
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000005485 electric heating Methods 0.000 abstract 5
- 230000007613 environmental effect Effects 0.000 abstract 4
- 230000006978 adaptation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
The invention provides a device capable of improving normal operation of DLP projection products in lower environmental temperature. The device for improving normal operation of the DLP projection in low temperature environment comprises a radiator arranged on a DMD; an electric heating apparatus is arranged on the radiator; a switch of the electric heating apparatus is controlled by a CPU; and the electric heating apparatus is powered by a power source. The device uses a means of electrically-heating the DMD, judges the environmental temperature by an environmental temperature detection device, and opens the electric heating apparatus to cause the temperature of the DND to reach the normal section; when the environmental temperature is over high, the electric heating apparatus is closed and simultaneously a radiator fan is opened for controlling temperature. The device and the method of the invention are simple, have low cost, and greatly broaden the applying field of the DLP projection products. The device and the method can be widely applicable to the DLP projection products adopting a DMD chip.
Description
Technical field
The present invention relates to a kind of DLP (digital light processing) projection products of can improving at devices and methods therefor than operate as normal under the low ambient temperature.
Background technology
DLP projection products application at present is more and more wideer, to the also progressively raising of adaptation requirement of environment, products such as particularly outdoor projection wall, flowable film projector are very high to the requirement of the temperature that conforms.Method at DLP projection products adaptation hot environment is a lot of at present, such as using heating radiator, fan, heat pipe or the like, still adapts to low temperature environment, does not also have ideal method at present.Core DMD (digital micromirror elements) chip that the DLP projection is used is a kind of structure of digital micromotor, and very high to the working temperature requirement, for guaranteeing its life-span and reliably working, its surface temperature will be controlled between 10 ℃ to 65 ℃.But other components and parts of DLP projection, such as optical element, semiconductor devices, it is wide a lot of that its temperature requirement is then wanted, therefore the bottleneck of the low-temperature working of DLP projection is on the temperature of DMD, if can resolve the temperature problem on DMD surface when low temperature environment, just solved the problem of DLP projection low-temperature working.
Summary of the invention
Technical matters to be solved by this invention provides a kind of DLP projection products of can improving at the device than operate as normal under the low ambient temperature.
The present invention also will provide a kind of above-mentioned DLP of improvement projection products in the method than operate as normal under the low ambient temperature.
The technical scheme that technical solution problem of the present invention is adopted is: improve the device that DLP is projected in operate as normal under the low temperature environment, comprise the heating radiator that is installed on the DMD, on described heating radiator, electric heater unit is installed, the switch of described electric heater unit is controlled by CPU, and described electric heater unit is powered by power supply.
Further, described electric heater unit is PTC thermistor or the constant well heater of PTC.
Further, described CPU judges the height of environment temperature by the temperature sensor that is placed on projector air inlet place.
Improve the method that DLP is projected in operate as normal under the low temperature environment, CPU judges by the temperature sensor that is placed on DLP projection air inlet place and starts the height of environment temperature electric heater unit at low temperatures, and close radiator fan.
The invention has the beneficial effects as follows: utilization of the present invention is carried out electrically heated means to DMD, pass through ambient temperature detection device, judge environment temperature, opening electric heater unit makes the temperature of DMD reach normal interval, when environment temperature is too high, then close electric heater unit, open radiator fan simultaneously, carry out temperature control.Apparatus of the present invention and method are simple, and cost is low, have widened the use field of DLP projection products greatly.The present invention can be widely used in the DLP projection products that adopts dmd chip, comprises various DLP projector, DLP projection combination, DLP rear-projection display device, back projection TV or the like.
Description of drawings
Fig. 1 is a synoptic diagram of the present invention.
Embodiment
As shown in Figure 1, the present invention installs electric heater unit on the heating radiator that installs additional on the DMD of projector, such as PTC (positive temperature coefficient) thermistor, the constant well heater of PTC etc., whether the switch that utilizes CPU to control electric heater unit is simultaneously controlled electric heater unit and is worked.Power supply is powered to electric heater unit, and power supply can be that alternating current also can be a direct current, and this depends on the type of the electric heater unit of selecting for use.
Above-mentioned CPU judges the height of environment temperature by the temperature sensor that is placed on projector air inlet place, and control the work of electric heater unit and fan respectively, promptly start electric heater unit at low temperatures, and close radiator fan, at high temperature close electric heater unit, and start radiator fan.
Claims (4)
1. improve the device that DLP is projected in operate as normal under the low temperature environment, comprise the heating radiator that is installed on the DMD, it is characterized in that: on described heating radiator electric heater unit is installed, the switch of described electric heater unit is controlled by CPU, and described electric heater unit is powered by power supply.
2. the DLP of improvement as claimed in claim 1 is projected in the device of operate as normal under the low temperature environment, it is characterized in that: described electric heater unit is PTC thermistor or the constant well heater of PTC.
3. the DLP of improvement as claimed in claim 1 is projected in the device of operate as normal under the low temperature environment, it is characterized in that: described CPU judges the height of environment temperature by the temperature sensor that is placed on projector air inlet place.
4. the DLP of improvement as claimed in claim 1 is projected in the method for operate as normal under the low temperature environment, it is characterized in that: CPU judges the height of environment temperature by the temperature sensor that is placed on DLP projection air inlet place, start electric heater unit at low temperatures, and close radiator fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103084370A CN101666967B (en) | 2009-10-19 | 2009-10-19 | Device for improving normal operation of DLP projection in low temperature environment and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103084370A CN101666967B (en) | 2009-10-19 | 2009-10-19 | Device for improving normal operation of DLP projection in low temperature environment and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101666967A CN101666967A (en) | 2010-03-10 |
| CN101666967B true CN101666967B (en) | 2011-04-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103084370A Expired - Fee Related CN101666967B (en) | 2009-10-19 | 2009-10-19 | Device for improving normal operation of DLP projection in low temperature environment and method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN101666967B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8937807B2 (en) * | 2011-11-21 | 2015-01-20 | Emerson Network Power—Embedded Computing, Inc. | Circuit board heatsink and heatframe structures with heater element for circuit board operation at below zero temperature |
| CN108073018A (en) * | 2016-11-15 | 2018-05-25 | 深圳市光峰光电技术有限公司 | The startup method of optic modulating device and dependent projections equipment |
| CN110119012B (en) * | 2018-02-05 | 2021-12-07 | 深圳光峰科技股份有限公司 | Heat-proof defocusing projection device |
| CN111443556B (en) | 2019-01-16 | 2021-10-15 | 中强光电股份有限公司 | Projector and its focus adjustment method |
| CN110645552B (en) * | 2019-10-16 | 2021-06-29 | 广州市珠江灯光科技有限公司 | Lamp control method and lamp |
| CN110687740A (en) * | 2019-11-19 | 2020-01-14 | 四川长虹电器股份有限公司 | System for DLP projection low temperature starts |
| CN113448150A (en) * | 2020-03-25 | 2021-09-28 | 苏州佳世达光电有限公司 | Projection light machine |
| CN111880361A (en) * | 2020-06-15 | 2020-11-03 | 中航国画（上海）激光显示科技有限公司 | DLP projector working in low-temperature environment and method |
| CN116184750A (en) * | 2022-12-30 | 2023-05-30 | 杭州中科极光科技有限公司 | Laser projector thermal management system adapting to wide temperature range |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2569184Y (en) * | 2002-09-03 | 2003-08-27 | 大亿科技股份有限公司 | Reflective liquid crystal projection display device with stable picture quality |
| CN1991567A (en) * | 2005-12-29 | 2007-07-04 | 台达电子工业股份有限公司 | Cold-starting display device and method |
-
2009
- 2009-10-19 CN CN2009103084370A patent/CN101666967B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2569184Y (en) * | 2002-09-03 | 2003-08-27 | 大亿科技股份有限公司 | Reflective liquid crystal projection display device with stable picture quality |
| CN1991567A (en) * | 2005-12-29 | 2007-07-04 | 台达电子工业股份有限公司 | Cold-starting display device and method |
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| Publication number | Publication date |
|---|---|
| CN101666967A (en) | 2010-03-10 |
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