Patent ID: 9728141
Date: 2017-08-08
CPC Classifications: G09G

Claim:
1. A projection display device, comprising: an image processing module configured for receiving an image data and generating a display signal, the display signal comprising an image period and a black state period; and a light source driver configured for generating a light driving signal to drive a projection light source, wherein the projection light source is an ultra-high-performance (UHP) lamp, the light driving signal comprises a first segment and a second segment in the black state period, and an average amplitude of the light driving signal in the second segment is lower than the average amplitude of the light driving signal in the image period, and the amplitude of the light driving signal is constant in the image period, wherein the average amplitude of the light driving signal in the first segment is larger than the average amplitude of the light driving signal in the second segment and the average amplitude of the light driving signal in the image period.