Global light boost for pulse width modulation display systems
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United States of America Patent
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May 1, 2001
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N/A
app pub date -
Jun 2, 1998
filing date -
Jun 4, 1997
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Abstract
A method for performing pulse width modulation (PWM) on a binary spatial light modulator using spatial-temporal multiplexing. A 10% light boost is achieved by eliminating deadtimes that are typically generated using the global-reset operation of a DMD when bit-planes having small on times are utilized. The number of bit-planes required is reduced by using a combination of binary and ternary bit-planes to achieve grayscale of a displayed digital image. By using a combination of spatial and temporal processing, digital pixel values can be displayed using a reduced number of bit-planes, without generating perceived artifacts such as pulsing due to pixels being turned on-off from frame to frame.
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