基于硅基CMOS的高性能全高清彩色Micro-LED显示驱动电路研究与设计

随着显示技术的快速发展，Micro-LED作为一种新兴的显示技术，因其具备高亮度、高对比度、低响应时间和低能耗等优点，已成为研究的热点。然而，为了充分发挥Micro-LED技术的潜力，需要高性能的显示驱动电路来实现精准的图像显示与色彩亮度管理。因此，本文围绕基于硅基CMOS技术的高性能全高清彩色Micro-LED显示驱动电路的研究与设计进行了深入探讨。

本研究首先分析了Micro-LED显示技术的基本原理及其在现代显示领域的应用前景，明确了高性能显示驱动电路设计的重要性。针对现有技术中存在的限制，如电流控制精度、显示效果和集成度等问题，本文提出了新型的显示驱动电路设计方案。通过采用SRAM结构的像素驱动单元以及先进的电流控制策略和彩色像素排布方案，提高了Micro-LED的显示质量。

在电路设计方面，本文详细介绍了基于CSMC 110nm工艺下的显示驱动电路的设计流程，包括像素驱动阵列、外围寻址驱动、亮度控制等模块电路架构的选择以及关键参数的确定。并解决了设计中遇到的信号同步性和驱动能力不足等挑战。特别是，本文通过8位高精度DAC的设计对于输出电流进行精确控制，以适应高速、高质量的显示需求。

为验证所提出设计方案的有效性，本文使用Cadence Virtuoso软件进行了电路的设计与仿真验证，对电路性能进行了测试。结果表明，所设计的显示驱动电路能够有效驱动全高清彩色Micro-LED显示屏。像素密度达到5000 PPI，实现11.57 KHz的子帧刷新率，最多可支持60 Hz刷新率和192级灰度等级。通过外接数字端，可实现55.56 KHz的子帧刷新率，可支持超过60 Hz刷新率和512级灰度等级。并通过线性误差小于3 nA的8位DAC，实现256级亮度等级。

With the rapid development of display technology, Micro-LED, as an emerging display technology, has become a research hotspot due to its advantages of high brightness, high contrast, fast response time, and low energy consumption. However, to fully exploit the potential of Micro-LED technology, high-performance display driver circuits are required to achieve precise image display and color brightness management. Therefore, this paper conducts an in-depth discussion on the research and design of high-performance full HD  color Micro-LED display driver circuits based on silicon-based CMOS technology.

This study first analyzes the basic principles of Micro-LED display technology and its application prospects in the modern display field, highlighting the importance of high-performance display driver circuit design. Addressing the limitations present in existing technologies, such as current control precision, display effects, and integration issues, this paper proposes a novel display driver circuit design scheme. By employing SRAM-structured pixel driving units along with advanced current control strategies and color pixel arrangement schemes, the display quality of Micro-LED is enhanced.

In terms of circuit design, this paper elaborates on the design process of display driver circuits based on the CSMC 110nm process, including the selection of circuit architectures for pixel driving arrays, peripheral addressing drivers, brightness control, and other modules, as well as the determination of key parameters. The design challenges, such as signal synchronization and insufficient driving capacity, were addressed. In particular, this paper achieves precise control of output current through the design of an 8-bit high-precision digital-analog converter, catering to the needs for high-speed, high-quality displays.

To validate the effectiveness of the proposed design scheme, circuit design and simulation verification were conducted using Cadence Virtuoso software, and the circuit performance was tested. Results indicate that the designed display driver circuit can effectively drive full HD color Micro-LED displays. The pixel density of the driving circuit reaches 5000 PPI, achieving a sub-frame refresh rate of 11.57 KHz, and can support up to 60 Hz refresh rate and 192 grayscale levels. By connecting to external digital circuits, a sub-frame refresh rate of 55.56 KHz can be achieved, supporting refresh rates exceeding 60 Hz and 512 grayscale levels. And achieve 256 brightness levels through an 8-bit DAC with a linear error less than 3 nA.

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