Display control apparatus, information processing apparatus, and

Details Display control apparatus, information processing apparatus, and Display control apparatus, information processing apparatus, and

1996-02-20

1999-05-25

Tung, Kee M.

Computer graphics processing and selective visual display system

Computer graphic processing system

Integrated circuit

345 97, G06F 1300

Patent

active

059073292

ABSTRACT:
It can be determined without visually observing the display screen of a display device whether image conversion processing in a conversion circuit for outputting image data to the display device is being performed normally. The conversion circuit extracts data at a position designated from a host apparatus from image data output to the display device, and outputs the extracted data to the host apparatus. In the host apparatus, image data obtained upon normal conversion in the conversion circuit is prepared in advance, and this image data is collated with the data sent from the conversion circuit to determine whether the operation of the conversion circuit is normal.

REFERENCES:
patent: 4964699 (1990-10-01), Inoue
patent: 5379051 (1995-01-01), Suga et al.
patent: 5613103 (1997-03-01), Nobutani et al.

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