Device for automatically adjusting LD current turn-off delay of projector and control method

Abstract

The invention discloses a device for automatically adjusting the LD current turn-off delay of a projector, and the device comprises the projector, a projection screen, a brightness testing module anda controller, the controller is connected with the brightness testing module, the controller and the brightness testing module communicate through a communication protocol, and the controller and theprojector are connected and communicate through the communication protocol; wherein the projector outputs a black field signal and projects the black field signal to a projection screen, the brightness test module measures the brightness of the screen and transmits brightness data to the controller, and the controller outputs LD current turn-off delay data to the projector after calculation. According to the device for automatically adjusting the LD current waveform of the projector, after a corresponding software method is added, the problem that the LD current waveform of a part of machinesand reset pulses of a part of DMDs cannot be completely matched in batch production of projectors can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of projectors, in particular to a device and a control method for automatically adjusting the LD current shutdown delay of a projector. Background technique [0002] A projector, also known as a projector, is a device that can project images or videos onto a screen. It can be connected to a computer, VCD, DVD, BD, game console, DV, etc. through different interfaces to play the corresponding video signal. DMD (Digital Light Processing) is the core device for projectors to realize digital light processing. The life of DMD is closely related to the performance of projectors. "A Method of Improving the Life of DMD" (application number: 201810178247.0; application publication number: CN 108346401; application date: 2018.03 .05) proposed a method to increase DMD lifetime by increasing DMD reset pulse. Since the status of the mirror on the DMD is uncertain during the DMD reset period, in order to avoid abnormal sc...

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a device and a control method for automatically adjusting the LD current turn-off delay of the projector, so as to solve the problem of the LD current turn-off delay data and part of the current technical solution. The problem that the reset pulse of DMD cannot be fully matched

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