数字光处理投影显示中的光源控制器设计

Design of Light Controller for Digital Light Processing Projection Display

为了实现DLP投影显示中光源与其他应用系统的集成以及实现仪器的自动化,设计了一种无线遥控操作的光源控制器。该光源控制器由三个电路组成:实现光源三个控制过程(灯丝预热、高压激发、稳流供电)的主电路,实现功能按键编码与无线电发送的遥控发射电路以及接受编码信息的遥控接受电路。在背投电视机中的应用表明,该光源控制器不仅实现了无线遥控,而且改善了光亮度输出稳定性和提高了图像显示质量。

To realize the integration of the light source of the digital light processing（DLP） projection display with the other application systems and its automation, a remote light controller was developed. The light controller is composed of three circuits： the main circuit to control the filament preheating, the high-voltage excitation, and the stablized power supply; the radio transmission circuit to perform the key coding and the radio transmission; the receiving circuit to receive the coding information. Application in the DLP projection television shows that the light controller not only realizes remote operation, but also improves the output stability of light source and the image display quality.