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42.1 A Novel Design of Sub‐frame and Current Driving Method for PM‐OLED
Author(s) -
Xiong Shaozhen,
Guo Bin,
Wu Chunya,
Chen Yousu,
Hao Yun,
Zhou Zhenhua,
Yang Huidong
Publication year - 2002
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.1830154
Subject(s) - oled , frame (networking) , pixel , multiplexing , computer science , grayscale , current (fluid) , frame rate , electrical engineering , electronic engineering , physics , engineering , materials science , telecommunications , computer vision , nanotechnology , layer (electronics)
Abstract A sub‐frame current driving method and circuit scheme for the PM‐OLED is presented. We designed a novel driving circuit which can drive a 64×64 PM‐OLED panel. There are totally 64 current sources that consist of 16 groups and each group represents the gray scale of 1,2,4 and 8 respectively. The whole frame is divided into four equal sub‐frames for 16 gray scales. By applying a novel current multiplexing method, in each sub‐frame the current passed through every OLED‐pixel is one of currents proportioned as 1: 2: 4: 8. The 4‐bit gray level data determine if the currents passed through each pixel. Thus totally 16 gray scales is achieved.