| Citation: |
刘铭, 秦波, Xiao Wenyu, Zhong Huiming, Chen Liang, Liu Lifang, Jia Chen, Chen Zhiliang. 实现64级灰度显示的无源OLED驱动芯片的设计[J]. Journal of Semiconductors, 2006, 27(11): 1889-1893.
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刘铭, 秦波, Xiao W Y, Zhong H M, Chen L, Liu L F, Jia C, Chen Z L. 实现64级灰度显示的无源OLED驱动芯片的设计[J]. Chin. J. Semicond., 2006, 27(11): 1889.
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实现64级灰度显示的无源OLED驱动芯片的设计
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Abstract
A mixed-signal driver chip for a 132×64-pixel passive matrix OLED panel is presented.The chip has a 64-step gray scale control using the PWM method and two-step voltage pre-charge technology to pre-charge the OLED pixels.It consists of a digital controller,SRAM for display data memory,a DC-DC voltage converter,reference current generators,a pre-charge voltage generator,64 common drivers,and 132 segment drivers.The single chip is a typical current-drive circuit.It has been implemented in a Chartered 0.35μm 18V HV (DDD) CMOS process with a die area of 10mm×2mm.Test results show that the power consumption of the whole chip and all pixels with a constant driving current of 100μA while displaying the highest gray scale is 294mW with a 12V high voltage supply and a 3V low voltage supply.-
Keywords:
- OLED,
- gray scale,
- PWM,
- pre-charge,
- segment driver,
- common driver
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References
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Proportional views
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