发明名称 |
Phase error control for color wheel |
摘要 |
A motor control unit (15c) for synchronizing a color wheel (15) to an incoming video signal and for re-synchronizing the color wheel after a channel change. The motor control unit (15c) has an error control unit (31), which detects an out-of-phase condition, and derives a color wheel sync signal from the pixel sample clock adjusted by any phase error. A drive unit (33) phase locks this sync signal to an index signal provided by the color wheel. The result is a tightly controlled re-synchronization that minimizes perceived effects.
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申请公布号 |
US5691780(A) |
申请公布日期 |
1997.11.25 |
申请号 |
US19950489971 |
申请日期 |
1995.06.13 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
MARSHALL, STEPHEN W.;HICKS, DONALD;BREITHAUPT, WILLIAM R. |
分类号 |
H04N9/30;H04N9/31;(IPC1-7):H04N9/12;H04N9/475 |
主分类号 |
H04N9/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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