Low cost vertical visual indicator system for on screen displays
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United States of America Patent
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Sep 5, 2006
Grant Date -
N/A
app pub date -
Jul 17, 2001
filing date -
Jul 17, 2001
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A circuit has been shown to illustrate how a vertical indicator can be generated in logic for a simplified OSD generator. The vertical visual indicator generated uses little microcontroller firmware overhead allowing a less powerful microcontroller to be used in the specific application, thus lowering system cost. A single byte is written to a counter to indicate the position of the vertical indicator. The OSD video coming from the OSD logic is overridden with a pixel overwrite signal when the location of the vertical indicator is located. The pixels overwrite whatever is located below the position of the vertical indicator. The pixel overwrite occurs for a predetermined time to fill a predetermined number of pixels. For example, if the vertical indicator is three pixels wide then the pixel overwrite signal occurs until three pixels have been overwritten.
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Cited Art Landscape
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