发明授权
- 专利标题: Light amplitude modulation with neutral density filters
- 专利标题(中): 中等密度滤光片的光振幅调制
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申请号: US698676申请日: 1996-08-15
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公开(公告)号: US5812303A公开(公告)日: 1998-09-22
- 发明人: Gregory J. Hewlett , Vishal Markandey , Gregory S. Pettitt
- 申请人: Gregory J. Hewlett , Vishal Markandey , Gregory S. Pettitt
- 申请人地址: TX Dallas
- 专利权人: Texas Instruments Incorporated
- 当前专利权人: Texas Instruments Incorporated
- 当前专利权人地址: TX Dallas
- 主分类号: G02B5/20
- IPC分类号: G02B5/20 ; G02B7/00 ; H04N9/31 ; G02B26/08
摘要:
A system and method for increasing the number of bits available for use in a video display system that includes at least one spatial light modulator. The system uses a wheel (30) of three colors, or a color wheel that is clear, including at least one segment (34) which has a lower intensity region, referred to as a neutral density filter. Alternately, the filter could be a liquid crystal controller to control either light amplitude or color. By using a lower intensity region, the amount of time available to process the least significant bit of the data sample is lengthened, thereby eliminating the constraint on the number of bits available for display.
公开/授权文献
- US4612672A Protective head gear 公开/授权日:1986-09-23
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