Character information processing circuit and method therefor

Details Character information processing circuit and method therefor Character information processing circuit and method therefor

1994-09-26

1998-03-17

Chow, Dennis-Doon

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345114, 345147, 348569, G09G 522

Patent

active

057292485

ABSTRACT:
A character information processing circuit performs half-blanking by decreasing the gain of a video signal component representing a background screen when various OSD characters, such as a menu, are to be displayed on the screen. Reducing the gain of the background screen enables the OSD characters to be easily distinguished. It should be noted that the background screen is also visible in the region where OSD characters are displayed due to adjustment of the blanking amount of the video signal in the OSD region. The character information processing circuit permits adjustment of the screen state produced in the OSD region by an OSD circuit. A method for generating an optimal OSD display is also described.1

REFERENCES:
patent: 5075766 (1991-12-01), Sendelweck
patent: 5200739 (1993-04-01), Eland
patent: 5386247 (1995-01-01), Shafer et al.

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