A mixed-signal driver chip for 65K-color passive-matrix OLED

Author

Xiao, Wenyu ; Chen, Zhiliang

Author_Institution

Inst. of Microelectron., Tsinghua Univ., Beijing

Volume

1

fYear

2005

fDate

24-0 Oct. 2005

Firstpage

473

Lastpage

477

Abstract

Organic light emitting display (OLED) is a new type of flat-panel display (FPD). And the research on the mix-signal driver chip for OLED is still going on. A single-chip passive-matrix OLED driver for 96 (RGB) times 64-pixel panel is presented in this paper. This driver chip has a 256-step contrast control and a 65k-color control. It consists of a digital controller, a SRAM as display data memory, a built-in DC-DC boost converter, an oscillator, 3 (RGB) reference current generators, 64 common drivers, and 96 times 3 segment drivers. The segment drivers use the pulse amplitude modulation (PAM) method to modulate grayscales and the voltage pre-charge technology to pre-charge the OLED pixels. This chip is a typical current-drive circuit. Simulation and analysis of its power consumption indicate that it is necessary for us to research the circuit design of the drivers and display mechanism (including pre-charge and discharge) further

Keywords

DC-DC power convertors; LED displays; SRAM chips; driver circuits; flat panel displays; mixed analogue-digital integrated circuits; organic light emitting diodes; oscillators; pulse amplitude modulation; reference circuits; 64 pixel; DC-DC boost converters; OLED driver; SRAM; display data memory; flat-panel display; mixed-signal driver chip; organic light emitting display; passive-matrix OLED; pulse amplitude modulation; reference current generators; segment drivers; voltage precharge technology; Amplitude modulation; DC-DC power converters; Digital control; Digital-controlled oscillators; Driver circuits; Flat panel displays; Gray-scale; Organic light emitting diodes; Pulse modulation; Random access memory;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC, 2005. ASICON 2005. 6th International Conference On

Conference_Location

Shanghai

Print_ISBN

0-7803-9210-8

Type

conf

DOI

10.1109/ICASIC.2005.1611361

Filename

1611361