基于LPC2210和SSD1339的PM-OLED驱动控制电路

为了避免早期无源矩阵有机电致发光器件驱动控制电路的一些缺陷,如:"串扰"和"交叉"效应以及电路连接比较复杂,用两种方法实现了基于飞利浦公司生产的LPC2210控制芯片和晶门科技公司的SSD1339驱动芯片的驱动控制电路。首先介绍了有机电致发光器件的结构和发光原理以及芯片SSD1339和LPC2210的主要的特点;分析和比较了SSD1339的8080系列并行口和LPC2210外部存储控制单元的读写时序;分别利用LPC2210的通用输入输出单元和外部存储控制单元,成功的控制SSD1339驱动128RGB×128点阵有机电致发光屏。实验结果表明:两种方法不仅可以有效地克服早期驱动控制电路的缺陷,而且可以使有机电致发光屏显示出高质量的图片;用外部存储控制单元实现的驱动控制电路,可以实现约80 Hz的驱动帧频;而使用通用输入输出单元实现的驱动控制电路,可以单步跟踪数据的传输,因此它具有方便查错的优势。本次实验为在不同的集成环境下无源矩阵有机电致发光器件驱动控制电路的设计奠定基础。

Driving and Controlling Circuits of PM-OLED Based on LPC2210 and SSD1339

In order to avoid the disadvantages of early PM-OLED driving and controlling circuits such as: the "cross talk" and "interference" phenomenon and much complexity, the circuits based on controlling IC LPC2210 and driving IC SSD1339 from Philips Corporation and Solomn Corporation respectively are designed in two ways. Structure and luminescent principle of OLED, SSD1339 and LPC2210 key features are introduced firstly. The two read and write timings of EMC on LPC2210 and 8080-series parallel interface on SSD1339 are compared and analyzed.SSD1339 is controlled to drive the 128RGB × 128 dot-matrix OLED panel successfully in two ways by using GPIO and EMC on LPC2210. The experimental results show that both ways can avoid the disadvantages of early driving and controlling circuits effectively, and make the panel display with good quality pictures. Using EMC, it is able to transmit about 80 pieces of picture in a second. Using GPIO, every steps of the data transmission can be tracked; therefore,it's convenient to find the hidden mistakes. The experiment provides guidelines for designing PM-OLED driving and controlling circuits in different integrated situations.