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Gray Code-Based 10-Bit Source Driver for Large-Size OLED Display
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DOI：10.1109/TCSII.2021.3053555.png)
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In this brief, a state-of-the-art source driver circuit is proposed for large-size organic light-emitting diode (OLED) display. The proposed source driver uses a three-stage digital to analog convertor (DAC) structure and the Gray code to achieve low power consumption and high precision based on high-voltage technology. A 10-bit source driver is structured into a two-stage 7-bit voltage selector and a single-stage 3-bit buffer, which effectively reduces the number of transistors. The Gray code is used instead of binary code to reduce the dynamic power consumption and minimize source driver output glitch. Compared with those of the traditional binary source driver, the dynamic and total power consumption of the proposed Gray code source driver are reduced by 86.95% and 21.29%, respectively. The glitch amplitude of that of the proposed Gray code source driver output is only 6.1% of the binary source driver. The size of the proposed source driver is 970 mu m x 28 mu m by 0.18 mu m BCD process.
Keyword:
Source driver
Gray code
three-stage DAC
large-size OLED
dynamic power consumption
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