Browsing by Author "Chen, Che-Chin"

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AMOLED panel driven by time-multiplexed clamped inverter circuit to reduce complex control signals
(2008-07-01)
Chen, Chun-Ho
;
Chen, Ke-Horng
;
Chen, Che-Chin
;
Chen, Yi-Fu
;
Shieh, Han-Ping D.
A time-multiplexing technique employing a pulse-width-modulation (PWM) charge-pump scheme for driving active-matrix organic light-emitting-diodes (AMOLEDs) is described. This scheme greatly reduces the number of control lines. The two-or four-phase PWM driving technique not only reduces costs through the simplification of manufacture but also improves the uniformity and lifetime of OLED panels. Experimental results show that the proposed circuit effectively and precisely controls the timing of OLED data-writing and light emission.
Mixed color sequential technique for high contrast LCD with optimum power consumption
(2007)
Chen, Yi-Fu
;
Chen, Che-Chin
;
Chen, Ke-Horng
;
電控工程研究所
;
Institute of Electrical and Control Engineering
This paper proposes a mixed color sequential (MCS) algorithm with high contrast enhancement technique in RGB LED backlight display. Owing to synchronous control of LCD and LED panels, high quality image with Suppressed color breakup and motion blur effects is achieved by our novel color sequential technique. Furthermore., high contrast image is also presented in LCD panel because of mixed RGB and CMY backlights with optimum power consumption. In other words, MCS algorithm with high contrast enhancement technique can have the better performance compared with other field sequential color techniques.
Mixed color sequential technique for reducing color breakup and motion blur effects
(2007-12-01)
Chen, Yi-Fu
;
Chen, Che-Chin
;
Chen, Ke-Horng
;
電控工程研究所
;
Institute of Electrical and Control Engineering
This paper proposes a mixed color sequential (MCS) algorithm with high contrast enhancement technique in RGB light-emitting diode (LED) backlight display. Owing to synchronous control of liquid crystal display (LCD) and LED panels, high quality image with suppressed color breakup (CBU) and motion blur effects is achieved by our novel color sequential technique. Importantly, MCS algorithm is useful for color filter-less optical compensated bend (OCB) panel display for alleviating CBU and motion blur effects. Furthermore, high contrast image is also presented on LCD panel because of mixed red-green-blue (RGB) and cyan-magenta-yellow (CMY) backlights with optimum power consumption. In other words, MCS algorithm with high contrast enhancement technique can have the better performance compared with other field sequential color techniques. Experimental results demonstrate by an actual RGB backlight module for 32-in 1366*768 LCD panel the improvement of CBU and motion blur effects.
Spatial-temporal division in field sequential color technique for color filterless LCD
(2007)
Chen, Che-Chin
;
Chen, Yi-Fu
;
Liu, Ti-Ti
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Chen, Chun-Ho
;
Ho, Ming-Tsung
For color filterless display, a novel spatial and temporal division (STD) field sequence color (FSC) display technique divides each frame into many temporary sub-frames for improving color breakup (CBU) and motion blur effects. Fast refresh frequencies enhance the image quality. Spatial and temporal division achieves low cost and power consumption.