Low cost vertical visual indicator system for on screen...

Details Low cost vertical visual indicator system for on screen... Low cost vertical visual indicator system for on screen...

2006-09-05

2006-09-05

Wu, Xiao (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

C715S722000, C348S569000

Reexamination Certificate

active

07102613

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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