Character data writing device

Details Character data writing device Character data writing device

1994-09-28

1996-03-19

Chin, Tommy P.

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345141, G09G 336

Patent

active

055006531

ABSTRACT:
A display data holding circuit holds character data, and serially outputs character data. A display data switching circuit inputs character data outputted from the display data holding circuit to a display data holding circuit again, and the display data switching circuit receives a switching command of display data, thereby switching character data outputted from the display data holding circuit to new character data to be inputted to the display data holding circuit. A display data latching circuit synchronizes character data outputted from the display data holding circuit with the latch pulse to be latched. A latch pulse generating circuit generates a latch pulse. A modulo N counter counts a number of clock pulses outputted from the latch pulse, and generates a reset pulse every time when the count of N number of clock pulses is ended, and the modulo N counter receives a forced reset signal, thereby generating a reset pulse. A control section supplies the switch command of display data to the display data switching circuit, and the forced reset signal to the modulo N counter at the same time.

REFERENCES:
patent: 4859998 (1989-08-01), Kawamura et al.
patent: 5051739 (1991-09-01), Hayashida et al.

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