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Silicon light-valve array chip for high-resolution reflective liquid crystal projection displays

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5 Author(s)
Sanford, J.L. ; IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598, USA ; Schlig, E.S. ; Tomooka, T. ; Enami, K.
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A crystalline silicon active-matrix 2048 × 2048-pixel light-valve array chip has been designed and fabricated as part of the development of a reflective liquid crystal technology for projection displays. The small feature processing and higher circuit performance available with crystalline silicon technology were exploited for the design and fabrication of the active-matrix chip. A 10-V CMOS process was developed to satisfy active-matrix pixel-cell requirements. Row-selection circuits were integrated which incorporate redundant data paths. Adjacent-line demultiplexing circuitry was integrated to minimize the number of external data drivers, to minimize the number of connections, and to maximize chip yield. The pixel, row-driver, and data-driver demultiplexing circuit designs and performance are discussed. The testing methods are presented. The chip is 64 mm on a side and is used in a prototype rear-projection color display system. Companion papers describe the system and its additional components incorporated in the prototype display system.

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

Published in:

IBM Journal of Research and Development  (Volume:42 ,  Issue: 3.4 )

Date of Publication:

May 1998

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