Browsing by Author "Chen, Chih-Wen"

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DESIGN OF AN AUTOMATED FEEDBACK CONTROL COOLING SYSTEM FOR SWIR LINEAR IMAGE SENSOR APPLICATION
(2010)
Chen, Chien-Hung
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Chen, Chih-Wen
;
Lin, Chun-Fu
;
Liao, Tai-Shan
;
Hwang, Chi-Hung
Our novel automated feedback temperature controlled cooling system consists of a temperature measurement circuit, a TE cooler, a thermistor, a microcontroller, and a digital-to-analog converter and PWM algorithms. The measurement accuracy of this temperature controlled TE system was better than 0.1 degrees C and can be used for maintaining an instrument's isothermal applications. The experimental results of SWIR linear image shows that the temperature can be stably maintained at -20 degrees C, the dark output current can be reduced almost 80mV (Integration time: 100 ms) and the SNR of pixel can be improved from 48dB to 83dB as well.
Direct View and Projection Switchable Mobile Display
(2009-01-01)
Huang, Hsin-Hsuan
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Chen, Cheng-Huan
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Lai, Yu-Cheng
;
Chang, Yu-Cheng
;
Huang, Yi-Pai
The function of mobile phone becomes more versatile as a personal assistant. In order to make display device optimized for different function of the mobile phone, this paper proposes a display device which can be switched among 2D direct view, 3D direct view and projection modes while using single liquid crystal(LC) panel as image source. The device features a highly collimated backlight unit and polymer dispersed liquid crystal(PDLC) diffuser at the back of the LC panel, and a switchable lenticular array as well as a stretchable projection lens in front. The ray tracing simulation has shown well controlled light path of the backlight module and sufficient image quality of the projection lens while maintaining the compactness of the device for mobile application.