A Fully Nonlinear Compact 10b Source Driver with Low-Voltage Gamma Slope DAC and Data/Phase Dependent Current Modulation Achieving 2411μm2/Channel for Mobile OLED Displays

📋 论文概要

本文提出了一种全非线性紧凑型10位源极驱动器，采用低压伽马斜率DAC和数据/相位相关电流调制技术，解决了传统电阻DAC面积随分辨率指数增长的问题，实现了高色深与紧凑尺寸的兼顾。

💡 主要创新点

• 提出全非线性架构，替代传统线性电阻DAC，大幅减小芯片面积。
• 采用低压伽马斜率DAC，实现低电压下的高精度伽马校正。
• 引入数据/相位相关电流调制，优化功耗与输出驱动能力。

🏷 关键词

📄 原文摘要

C&Tech, Seoul, Korea 1 2 With the rapid development of display technology, there is a growing demand for highcolor-depth, low-power, cost-effective, and compact source-driver ICs (SD-IC), which convert digital data to analog output to drive display panels. However, it is challenging to satisfy both high color depth and compact size because of the resistor digital-to-analog converter (RDAC) in conventional SD-ICs, whose silicon area exponentially grows as the DAC resolution increases. To overcome this issue, piecewise-linear interpolation methods have been studied by combining a nonlinear RDAC and sub-bit linear interpolation [1-5]. These methods can decrease the channel area by using a smaller-bit RDAC, but their piecewise-linear output voltages cannot fully cover the nonlinear gamma voltage range, degrading display quality as shown in Fig. 26.2.1 (top left). For example, to produce the same effective 10b color depth as a conventional SD-IC with nonlinear 10b

👥 作者与机构

Jaewoong Ahn1, Seung Hun Choi1, Junyeol An1, Ki-Duk Kim2, Hyung-Min Lee1

Korea University, Seoul, Korea