摘要
为了解决全彩LED同步视频显示屏灰度级低、刷新速度不高的问题,根据LED大屏的驱动结构,设计了256级显示灰度时刷新率可达90 Hz的数据处理电路。该电路的设计,应用了数字视频数据信号位面分离的策略,采用了分场写入、分区读出缓存存储器的方法。详细介绍了电路的数据处理流程和关键功能模块的实现。实际测试表明,该设计满足了高亮度、低图像闪烁、无掉色的技术指标。
To solve the problem of low grey scale and refresh rate existed in full - color LED synchronous video display screen,data processing circuit is designed according to the LED screen driver architecture. The digital video signals bit plane separation strategy is applied in the circuit design,and the sub - field writing- in and sub - area readout to the cache memory method is used. It can reach 90 Hz refresh rate at 256 grey scales. Data process flow and critical functional modules' implementation are introduced. Functional test shows that the design meets the specifications of high brightness, less image flutter and no colour missing.
出处
《现代电子技术》
2008年第17期174-176,179,共4页
Modern Electronics Technique
基金
中国工程物理研究院科学技术发展基金重点项目(2007A05001)
四川九洲公司企业创新基金