一种用于TFT-LCD液晶显示的片内门宽调制控制器的设计  

Design of an On-Chip Gate Pulse Modulate Controller for a TFT-LCD

作　　者：叶强[1] 来新泉[1] 陈富吉[1] 李演明[1] 袁冰[1] 

机构地区：[1]西安电子科技大学电路CAD所,西安710071

出　　处：《Journal of Semiconductors》2008年第8期1620-1626,共7页半导体学报（英文版）

摘　　要：为了防止在液晶显示面板上发生闪烁和减小栅驱动器的馈通现象,设计了一种基于升压型DC-DC和电荷泵的用于TFT-LCD液晶显示的片内门宽调制控制器.该控制器能减小液晶显示功耗,减少栅走线和液晶面板之间的耦合效应,其输出延时可调并输入到栅驱动器中,从而避免液晶显示设备错误的显示.采用该门宽调制器的基于电流模PWM升压型DC-DC和电荷泵的芯片已在UMC 0.6μm BCD工艺线投片,DC-DC的效率高达93%,可调电荷泵输出电压为10~30V,测试结果证明该门宽调制控制器电路工作良好,其面积为0.3mm2,静态电流小于1μA.To prevent the flicker phenomenon on a liquid crystal and the feed through phenomenon in a gate driving unit of a liquid crystal display device, a gate pulse modulate controller is designed. It can minimize power consumption and reduce the coupling effect between gate line and pixel. It applies an output voltage with a time delay to the gate driving unit, thereby preventing erroneous oper- ation of the liquid crystal display device. A current mode PWM Boost DC-DC converter and a charge pump employing this gate pulse modulate controller circuit have been implemented in a UMC 0.6t^m-BCD process. The efficiency of the DC-DC converter is up to 93%, the output of the adjustable charge pump is 10--30V, and the results indicate that the circuit works well and effectively. The chip area of the gate pulse modulator circuit is 0.3mm2 and it consumes less than 1μA of quiescent current.

关 键 词：DC-DC转换器 电荷泵 门宽调制 可调延时 

分 类 号：TN492[电子电信—微电子学与固体电子学]