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9.4: Late‐News Paper : Fast Current‐Programming Method to OLED
Author(s) -
Shim ChangHoon,
Hattori Reiji
Publication year - 2008
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 - 10.1889/1.3069317
Subject(s) - amoled , current (fluid) , pulse width modulation , electrical engineering , amplifier , capacitance , computer science , voltage , oled , electronic engineering , materials science , engineering , physics , nanotechnology , cmos , layer (electronics) , electrode , quantum mechanics , active matrix , thin film transistor
The concept of ‘negative capacitance’, which consists of a differentiation circuit, an inverting voltage amplifier and a voltage‐to‐current converter, was introduced to the driving of PMOLED to shorten the current setting time even at a small current level. This new driving circuit enabled to show an accurate gray scale with both PWM and PAM methods, and is also applicable to a current‐programmed AMOLED.