On-screen display device

Details On-screen display device On-screen display device

2007-01-30

2007-01-30

Tung, Kee M. (Department: 2628)

Television

Basic receiver with additional function

For display of additional information

C345S467000, C345S551000, C345S556000, C348S589000, C348S600000

Reexamination Certificate

active

10752509

ABSTRACT:
This invention provides an on-screen display device that can display an increased number of types of characters without enlarging the video RAM area. This on-screen display device includes a character generator ROM that has n (n is an integer that is equal to or larger than 3) areas, a flag holding unit that outputs an area designation flag for designating a desired number of desired areas among the n areas in the character generator ROM, a display character setting unit that writes a desired character code at a predetermined position in a video RAM, and a display control unit that reads the character code from the video RAM, reads font data corresponding to the read character code from an area in the character generator ROM, which is indicated by the area designation flag outputted from the flag holding unit, and outputs an on-screen output signal using the font data.

REFERENCES:
patent: 5396297 (1995-03-01), Shindou et al.
patent: 5721568 (1998-02-01), Kim
patent: 6480875 (2002-11-01), Miyoshi et al.
patent: 9-54575 (1997-02-01), None
patent: 11-102352 (1999-04-01), None

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