Computer graphics processing and selective visual display system – Computer graphics display memory system – Frame buffer
Reexamination Certificate
2006-03-07
2006-03-07
Tung, Kee M. (Department: 2671)
Computer graphics processing and selective visual display system
Computer graphics display memory system
Frame buffer
C345S467000, C345S581000, C348S564000, C348S569000
Reexamination Certificate
active
07009617
ABSTRACT:
An on-screen display device that can effectively utilize a video RAM area. This on-screen display device includes a video RAM that holds character data of desired characters that are to be displayed; a display character setting unit for locating the number of bits as many as the remainder that is obtained by dividing character data corresponding to one character by the number of bits that can be read at one-time access from the video RAM, collectively by one line in the video RAM; buffers for storing a part of character data of the respective characters; a character generator ROM for outputting font data corresponding to the character codes; and a display control unit for reading character data from the video RAM via the buffers at the display of the characters, and reading the font data that are created by the character generator ROM, thereby outputting an on-screen output signal.
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Kotani Satoru
Maruoka Toshihiko
Tanaka Keisuke
Matsushita Electric - Industrial Co., Ltd.
Tung Kee M.
Wenderoth , Lind & Ponack, L.L.P.
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