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Proceedings Paper

Digital photofinishing system based on liquid crystal on silicon
Author(s): Minmin Zheng; Huimin Yan; Xiuda Zhang; Yanli Du
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Paper Abstract

As the digital camera user base grows, so does the demand for digital imaging services. A new digital photo finishing system based on Liquid Crystal On Silicon (LCOS) is presented. The LCOS panel motherboard is made up of CMOS chip. Three individual streams of light (red, green, blue) are directed to corresponding Polarization Beam Spliter (PBS) to make the S polarization beam arrive at LCOS panel. When the Liquid appears light, the S polarization beam is changed to P polarization beam and reflected to pass through Polarization Beam Spliter. Compared with Thin Film Transistor-Liquid Crystal Display (TFT-LCD), LCOS has many merits including high resolution, high contrast, wide viewing angle, low cost and so on. In this work, we focus on the way in which the images will be displayed on LCOS. A liquid crystal on silicon microdisplay driver circuit for digital photo finishing system has been designed and fabricated using BRILLIAN microdisplay driver lite(MDD-LITE) ASIC and LCOS SXGA (1280×1024 pixel) with a 0.78"(20mm) diagonal active matrix reflective mode LCD. The driver includes a control circuit, which presents serial data, serial clock , write protect signals and control signals for LED, and a mixed circuit which implements RGB signal to input the LCOS. According to a minimum error sum of squares algorithm, we find a minimum offset and then shift RGB optical intensity vs voltage curves right and left to make these three curves almost coincide with each other. The design had great application in the digital photo finishing.

Paper Details

Date Published: 26 January 2006
PDF: 8 pages
Proc. SPIE 6030, ICO20: Display Devices and Systems, 60300O (26 January 2006); doi: 10.1117/12.667637
Show Author Affiliations
Minmin Zheng, Zhejiang Univ. (China)
Huimin Yan, Zhejiang Univ. (China)
Xiuda Zhang, Zhejiang Univ. (China)
Yanli Du, Zhejiang Univ. (China)


Published in SPIE Proceedings Vol. 6030:
ICO20: Display Devices and Systems
Tatsuo Uchida; Xu Liu; Hang Song, Editor(s)

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