AMOLED显示驱动芯片电源管理系统研究与设计

发布时间：2018-05-30 22:38

本文选题：AMOLED显示面板 + AMOLED驱动芯片　；参考：《电子科技大学》2014年硕士论文

【摘要】：随着手机、电脑、平板等移动通信设备的普及,人们对通信设备的需求从拥有数量增多到追求体验提升。超高清,大尺寸,全视角的显示屏幕越来越受到人们的追捧。有源矩阵有机发光二极管(AMOLED)面板具有得天独厚的优势。无论是在效率,成本还是发光质量上,比起LCD液晶显示器,AMOLED具有先天性优势。OLED器件本省具有主动发光,高对比度,高视角度,成本低,功耗低,可工作温度范围大的优点。目前国内对AMOLED显示技术的研究已经取得了很大的进展。然而,国内AMOLED驱动显示技术发展却比较迟滞,这就制约了OLED显示器的推广与应用,同时失去了AMOLED产业发展的话语权。而电源管理系统作为驱动芯片核心模块,直接控制着整颗驱动芯片的功耗、寿命、成本以及输出色彩亮度,从而也决定了芯片的以及OLED显示器的发展。因此设计出具有优良系统架构的电源管理系统,对驱动芯片具有重要意义。本文首先研究了一款480RGB×800分辨率的AMOLED显示面板驱动芯片架构,然后结合该驱动芯片对电源的需求指标,设计了本芯片的电源管理系统架构,并完成了子模块电路仿真设计和版图设计。最后得到了仿真结果。本文通过分析介绍了几种电源管理解决方案,根据驱动芯片的电压需求,结合本课题的芯片应用场合,提出了一种由LDO、电荷泵和振荡器组合而成的电源管理系统方案。然后提出并设计了一带有电荷泻放支路的高瞬态响应LDO和一种结构简单、低功耗、且频率可由数字信号控制的新型张弛振荡器。本文设计的LDO电路带有电荷泻放支路和过温保护模块,比传统的LDO瞬态响应性好,输出电压精度高,这也是本文所设计LDO的创新点。本文设计的张弛振荡器电路比传统的张弛振荡器结构简单,只用了一个比较器,并且电路自身产生比较器基准电压,大大简化了振荡器结构,降低了系统功耗,节约了面积,降低芯片成本,同时具有10MHz~40MHz的频率调节范围。本文设计电源管理系统基于HL55nm工艺完成了电路的设计和仿真验证,并完成了部分电路版图设计。仿真结果最终显示,满足了驱动芯片对电源电压的需求,完成了预期设计目标。
[Abstract]:With the popularity of mobile communication devices, such as mobile phones, computers and tablets, the demand for communication devices has increased from ownership to experience. Ultra-HD, large-size, full-angle display screen is increasingly popular. Active matrix organic light emitting diode (AMOLED) panel has unique advantages. In terms of efficiency, cost and luminous quality, LCD LCD devices have the advantages of active luminescence, high contrast, high viewing angle, low cost, low power consumption and wide operating temperature range. At present, great progress has been made in the research of AMOLED display technology in China. However, the development of domestic AMOLED driver display technology is relatively slow, which restricts the promotion and application of OLED display, and loses the right to speak in the development of AMOLED industry. The power management system, as the core module of the driver chip, directly controls the power consumption, lifetime, cost and output color brightness of the whole driver chip, which also determines the development of the chip and OLED display. Therefore, it is of great significance to design a power management system with excellent system architecture. This paper first studies a 480RGB 脳 800resolution AMOLED display panel driver chip architecture, and then designs the power management system architecture of the chip based on the power demand index of the driver chip. The circuit simulation and layout design of the sub-module are completed. Finally, the simulation results are obtained. In this paper, several power management solutions are analyzed and introduced. According to the voltage requirement of the drive chip and the application of the chip in this paper, a power management system is proposed, which is composed of LDO, charge pump and oscillator. Then a high transient response LDO with charge discharge branch and a novel Zhang Chi oscillator with simple structure, low power consumption and frequency control by digital signal are proposed and designed. The LDO circuit designed in this paper has charge-discharge branch and over-temperature protection module, which has better transient response and higher output voltage precision than the traditional LDO. This is also the innovation of the LDO designed in this paper. The Zhang Chi oscillator circuit designed in this paper is simpler than the traditional Zhang Chi oscillator and uses only one comparator. The circuit itself generates the reference voltage of the comparator, which greatly simplifies the oscillator structure, reduces the power consumption of the system and saves the area. Reduce the chip cost and have the frequency range of 10MHz~40MHz at the same time. This paper designs a power management system based on HL55nm process to complete the circuit design and simulation verification, and completed part of the circuit layout design. The simulation results show that the requirement of power supply voltage is satisfied and the expected design goal is achieved.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN873

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