Liquid crystal display converter

Details Liquid crystal display converter Liquid crystal display converter

1994-11-09

1997-08-12

Powell, Mark R.

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 98, G09G 336

Patent

active

056570449

ABSTRACT:
A liquid crystal display converter has at least two frame memories. An alternative switching operation is performed by controlling the operations of an address generating circuit and a data switching circuit on the basis of an output from a frame counter. In the alternative switching operation, when one of the frame memories performs a writing operation, the other frame memory performs a reading operation. In contrast to this, when one of the frame memories performs a reading operation in the alternative switching operation, the other frame memory performs a writing operation. In this construction, the number of access operations of the frame memories is reduced so that the liquid crystal display converter can be constructed by a memory relatively cheaply manufactured without using any high speed memory. Accordingly, price of the liquid crystal display converter can be reduced.

REFERENCES:
patent: 4630122 (1986-12-01), Morokawa
patent: 4745485 (1988-05-01), Iwasaki
patent: 4908710 (1990-03-01), Wakai et al.
patent: 5512915 (1996-04-01), Leroux

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