Light valve driving control method and device and projection equipment

Abstract

The invention relates to the field of projection display, and particularly discloses a light valve driving control method and device. The method comprises the steps of: controlling to turn off a lightsource according to a set rotation switching time period in an output time period when the light source outputs a specified primary color light beam, and enabling the rotation switching time period to be smaller than the output time period of the specified primary color light beam, in the rotation switching time period, driving a digital micro-reflection lens on the light valve to perform rotation switching between an on state and an off state until the switching end time indicated by the rotation switching time period is reached, and when the switching end time is up, controlling the digitalmicro-reflection lens subjected to rotation switching to recover to the state where the digital micro-reflection lens is located when rotation switching is started, and controlling the light source to be turned on. By repeatedly reversing the digital micro-reflection lens in the rotation switching time period, the mechanical fatigue state caused by the fact that the digital micro-reflection lensis kept in the same state for a long time in the image display process can be relieved.

Description

technical field [0001] The present disclosure relates to the field of projection display, in particular to a light valve drive control method, device and projection equipment. Background technique [0002] DLP (Digital Light Processing, digital light processing) projection equipment is based on the light valve (also known as DMD, Digital Micro-mirror Device digital micro-mirror device) configured inside the light valve (also known as DMD, Digital Micro-mirror Device) to output the light source. The light beam is reflected, thereby performing the projection display of the image. On the light valve, each digital micro-mirror has its own independent driving device, which is used to support the rotation and switching of the digital micro-mirror between the on state and the off state, wherein the digital micro-mirror is between the on state and the off state. The switching speed can reach thousands of times per second. [0003] figure 1 is the working schematic diagram of the ...

AI Technical Summary

Problems solved by technology

In the DLP projection equipment, the light source outputs the three primary color beams sequentially, and the time for outputting each primary color beam of the three primary colors (red, green, blue) is very short each time, so although the three primary colors enter the human body in different time periods Eyes, but due to the persistence of vision of the human eye, it is impossible to distinguish the colors that enter the human eye within such a subtle difference, so in terms of perception, it will form a colorful image

[0004] Since the digital microreflector on the light valve and its corresponding rotating device are high-precision devices, if the digital microreflector remains on or off for a relatively long period of time when displaying a picture, for example, it is necessary to display the same image for a long time. A large picture, or the same gray scale part, will cause mechanical fatigue of the driving device corresponding to the digital micro-mirror mirror, which will easily lead to damage to the light valve, thereby affecting the projection display effect

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