Apparatus for controlling the luminance of video signals in char

Details Apparatus for controlling the luminance of video signals in char Apparatus for controlling the luminance of video signals in char

1996-07-30

1998-09-29

Burgess, Glenton B.

Television

Basic receiver with additional function

For display of additional information

348589, 348673, 348687, H04N 5445

Patent

active

058152156

ABSTRACT:
A video signal luminance control apparatus is provided, which includes an input portion for receiving a luminance signal of the video signal, a transistor with a collector receiving the input luminance signal input from the input portion, via a resistor, and a controller which is connected to the base of the transistor for outputting a control signal for controlling the on/off operation of the transistor in an area where an on-screen-display (OSD) character is displayed. A simple transistor receiving the control signal is used to control the luminance of a video signal in an area where an OSD character is displayed, thereby providing a luminance control apparatus for clearly displaying OSD characters.

REFERENCES:
patent: 5264934 (1993-11-01), Nakagawa
patent: 5481318 (1996-01-01), Flowers

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