| Citation: |
Ye Qiang, Lai Xinquan, Chen Fuji, Li Yanming, Yuan Bing. Design of an On-Chip Gate Pulse Modulate Controller for a TFT-LCD[J]. Journal of Semiconductors, 2008, 29(8): 1620-1626.
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Ye Q, Lai X Q, Chen F J, Li Y M, Yuan B. Design of an On-Chip Gate Pulse Modulate Controller for a TFT-LCD[J]. J. Semicond., 2008, 29(8): 1620.
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Design of an On-Chip Gate Pulse Modulate Controller for a TFT-LCD
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Abstract
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 operation 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 0.6μm-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. -
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