There Are Organic Light-emitting Driver Chip And Circuit Design

The basic organic light-emitting device (OLED) consists of a number of ultra-thin organic layers between two electrodes. Under low applied voltage, the recombination of carriers coming from cathode and anode can produce intense light output. Since 1987, OLED has received much attention and now are beginning to enter the display markets where they may eventually be the dominant flat panel display devices.This thesis mainly discusses the driving chip and driver for the OLED.In this dissertation, first of all, it takes a review of the concepts and theories describing the mechanisms of organic electro-luminescence , and introduces some interior research about the driving circuit for the passive matrix OLED. We have analyzed the working process of the OLED driving chip, and the relationship among the luminance, voltage and the density of current. We had modified the driver of LED and realized driving the passive matrix OLED of 3232 panel by direct current driving.Based on the OLED luminescent theory, we have designed the software of driving chip and driver by alternating current driving method. The driving plus's frequency and duty cycle can be changed by the software.We have designed a software about eight level gray-scale plus shifting modulation. It can prevent the output timing of the column driving signal from coinciding at neighboring columns, eases the concentration of supply current, and reduces power consumption, Integrate the idea of alternating current driven method and gray-scale plus shifting modulation, we designed the software which includes both of the functions for OLED driving chip. The software can work successfully under 50MHz clock in simulation.At last this thesis gives some advices about the design of the OLED's structure and the debugging scheme of the OLED's driver.