Title :
Driving Scheme Using Bootstrapping Method for Blue-Phase LCDs
Author :
Chun-Da Tu ; Chih-Lung Lin ; Jin Yan ; Yuan Chen ; Po-Chun Lai ; Shin-Tson Wu
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
We present a new pixel circuit on glass using hydrogenated amorphous silicon (a-Si:H) for driving polymer-stabilized blue-phase liquid crystal displays (BPLCDs). Different from conventional nematics, BPLC demands a large dielectric anisotropy in order to lower the operation voltage. As a result, the pixel´s capacitance is increased by ~ 10×, which seriously limits the charging capability and optical efficiency. Simulation results show that the average error rate of storage voltage in pixel circuit is below 5.14% for 180 Hz operating frequency.
Keywords :
bootstrap circuits; driver circuits; liquid crystal displays; liquid crystal polymers; nematic liquid crystals; thin film transistors; BPLCD; TFT; bootstrapping method; dielectric anisotropy; driving polymer-stabilized blue-phase liquid crystal displays; frequency 180 Hz; hydrogenated amorphous silicon; nematics; optical efficiency; pixel circuit on glass; Capacitors; Electrodes; Error analysis; Liquid crystal displays; Low voltage; Polymers; Blue-phase liquid crystal (BPLC); driving circuit; hydrogenated amorphous silicon (a-Si:H);
Journal_Title :
Display Technology, Journal of
DOI :
10.1109/JDT.2012.2229694
