A 6-bit Gamma-Corrected DAC with a Low-Power Buffer for Column Drivers
Date Issued
2009
Date
2009
Author(s)
Lin, Cheng-Hsiao
Abstract
For the popularity of mobile multimedia, display techniques also revolute and develop continuously. Light, thin, low power consumption, and cost down are demanded without end for the researchers. The high-resolution and low-power of TFT-LCD drivers are the most important issues in the implementation of display driving system.mong circuits consisting in the LCD driving system, the column driver consumes the most power and determines the speed and resolution. Several LCD column driver architectures are proposed. However, both independent gamma correction and higher gray-scale capability are necessary in high-performance applications.n this thesis, an integrated gamma-corrected digital-to-analog converter with a low-power buffer for TFT-LCD column drivers is proposed. The whole chip occupies an area of 1.32 ? 1.48 mm2 fabricated in TSMC 0.35-µm 5V technology. The column driver can output symmetric gamma-corrected waveforms to charge or discharge channels under the operation of dot inversion, and can be designed for different gamma curve according to individual RGB color.
Subjects
TFT-LCD
column driver
gamma correction
digital-to-analog converter
dot inversion
Type
thesis
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