Jae-Goo Lee, J. Woo, B. Kong, Young-Hyun Jun, Chil-Gee Lee, I. Kang, Bongnam Kim, Jin-Tae Kim
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引用次数: 0
摘要
提出了一种用于移动TFT_LCD驱动ic (t - ldi)的机会源线驱动(OSLD)方案。在OSLD方案中，T-LDI的源驱动程序的操作由相邻像素的RGB颜色数据的等效性控制。也就是说，当相邻像素的颜色数据相同时，一个源驱动驱动相邻的源行以及相应的源行。通过这种方案，可以完全关闭与相邻源线相关联的所有源驱动器，从而减少这些驱动器的静态和动态电流。采用5 v /0.8 um 2.5V/0.25 um三金属CMOS工艺制作测试芯片，实验结果表明，在芯片尺寸开销小于0.5%的情况下，功耗降低12% ~ 21%。
An Opportunistic Source Line Driving Scheme for Low Power Mobile TFT-LCD Driver IC
An opportunistic source line driving (OSLD) scheme is proposed for use in mobile TFT_LCD driver ICs (T-LDIs). In OSLD scheme, the operation of the source drivers of a T-LDI is controlled by the equivalence of RGB color data for adjacent pixels. That is, one source driver drives the neighboring source lines as well as the corresponding one when the color data of adjacent pixcels are identical to each other. With this scheme, all the source drivers associated with the neighboring source lines can be completely turned off, allowing the reduction of static and dynamic current of these drivers. Test chip was fabricated in a 5-V/0.8-um 2.5V/0.25-um triple-metal CMOS process, and the experimental result shows that the power reduction of 12% ~ 21% was obtained with die size overhead less than 0.5%.
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