DMD chip temperature monitoring method and device

Abstract

The invention discloses a DMD chip temperature monitoring method and device. The method comprises the steps that operating temperatures at different positions of a DMD chip are sensed; whether at least one of all the operating temperatures is greater than a first preset threshold or not is judged; if yes, a shutdown alarm is given, or otherwise whether at least one of all the operating temperatures is greater than a second preset threshold or not continues to be judged; if yes, a brightness lowering alarm is given, or otherwise whether the difference between the operating temperature at the front position and the operating temperature at the back position is greater than a third preset threshold or not continues to be judged; if yes, a shutdown alarm is given, or otherwise whether the difference is greater than a fourth preset threshold or not continues to be judged; and if yes, a brightness lowering alarm is given, or otherwise an alarm is not given, and sensing and judgment continueto be performed. Through the DMD chip temperature monitoring method and device, the operating temperatures of the DMD chip can be monitored in real time, and corresponding alarms can be given according to different conditions of the operating temperatures and the difference between the operating temperature at the front position and the operating temperature at the back position.

Description

technical field [0001] The invention relates to the technical field of projection equipment. More specifically, it relates to a temperature monitoring method and device for a DMD chip. Background technique [0002] At present, the widely used DLP (Digital Light Processing, digital light processing) projector is based on a DMD (Digital Micromirror Device, digital micromirror device) chip to complete visual digital information display. In a DLP projector, the light beam passes through a series of lenses and then exits onto the DMD chip. The display image of the DMD chip is irradiated by the light spot and then reflected to the lens for projection to form a projected image. The DMD chip is a key component in a DLP projector, and its performance largely determines the overall performance of the DLP projector. [0003] When the light spot is irradiated on the DMD chip, the DMD chip reflects the light spot. Since the DMD chip cannot completely reflect the non-spot, part of the ...

AI Technical Summary

Problems solved by technology

The temperature resistance of DMD chips is usually limited. Therefore, when the brightness of the light spot is too high, or the position of the light spot on the DMD chip is shifted, the temperature of the DMD chip will be higher than the maximum temperature resistance value, which will cause the DMD chip to damaged

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