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Device for improving normal operation of DLP projection in low temperature environment and method thereof

A low-temperature environment, normal work technology, applied in projection devices, cooling/ventilation/heating transformation, optics, etc., can solve the problem of low-temperature operation of DLP projection, and achieve the effects of widening the application field, low cost, and simple devices and methods

Inactive Publication Date: 2011-04-06
SICHUAN CHANGHONG ELECTRIC CO LTD
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Problems solved by technology

However, other components of DLP projection, such as optical parts and semiconductor devices, have much wider temperature requirements. Therefore, the bottleneck of DLP projection's low-temperature operation is the temperature of DMD. If the temperature problem of DMD surface in low temperature environment can be solved , it solves the problem of low temperature operation of DLP projection

Method used

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  • Device for improving normal operation of DLP projection in low temperature environment and method thereof
  • Device for improving normal operation of DLP projection in low temperature environment and method thereof

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Embodiment Construction

[0011] Such as figure 1 Shown, the present invention installs electric heating device on the radiator that the DMD of projector installs additionally, such as PTC (positive temperature coefficient) thermistor, PTC constant heater etc., utilize CPU to control the switch of electric heating device simultaneously Control whether the electric heating device is working. The power supply supplies power to the electric heating device, and the power supply can be alternating current or direct current, depending on the type of electric heating device selected.

[0012] The above-mentioned CPU judges the ambient temperature through the temperature sensor placed at the air inlet of the projector, and controls the work of the electric heating device and the fan respectively, that is, starts the electric heating device at low temperature, turns off the cooling fan, and turns off the electric heating device at high temperature. Heat the unit and start the cooling fan.

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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 [0001] The invention relates to a device and method capable of improving the normal operation of DLP (Digital Light Processing) projection products at lower ambient temperatures. Background technique [0002] At present, the application of DLP projection products is getting wider and wider, and the requirements for adapting to the environment are also gradually increasing, especially for products such as outdoor projection walls and mobile movie projectors, which have very high requirements for adapting to the environment temperature. At present, there are many methods for DLP projection products to adapt to high-temperature environments, such as using radiators, fans, heat pipes, etc., but there is no better way to adapt to low-temperature environments. The core DMD (Digital Micromirror Device) chip used in DLP projection is a digital micro-motor structure, which requires very high operating temperature. In order to ensure its life and reliable operation, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/16H05K7/20
Inventor 朱晓东
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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