【摘要】 设计了QVGA分辨力硅基液晶(Liquid Crystal on Silicon)微显示芯片,采用比较器与计数器相结合的D/A转换方式,降低了芯片的功耗和电路的设计难度;设计了QVGA微显示芯片视频驱动系统,以CPLD为核心控制单元搭建了视频显示驱动板,接收计算机输出的VGA显示信号,经过控制单元进行行列变换与时序处理,驱动LCoS微显示芯片显示视频图像,测试结果表明显示芯片像素点灰度响应正确,符合液晶材料要求,能够显示分辨力320×240、帧频60Hz的动态视频,视频显示响应速度快,显示功能符合设计要求。更多还原

【Abstract】 QVGA liquid crystal on silicon microdisplay chip is designed by using D/A converter constructed with comparators and counters, which reduce power consumption and design difficulty of the chip. A QVGA microdisplay video driver system is designed, and a video driver board is built using a CPLD as the central control unit. Video system receives VGA signal output by computer and processes the signal by the control unit to implement the row and column transform and drive LCoS microdisplay chip to display video signal. Test result indicates that gray scales response of the pixel is correct and voltage level meets the requirement of liquid crystal material. The microdisplay chip can display 60Hz 320×240 dynamic video, the display response is fast, and design requirement of display function is satisfied.更多还原