Method and apparatus for multi-level tone display for liquid cry

Details Method and apparatus for multi-level tone display for liquid cry Method and apparatus for multi-level tone display for liquid cry

1990-01-30

1993-04-27

Brier, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340793, G09G 336

Patent

active

052066355

ABSTRACT:
A liquid crystal display apparatus including a liquid crystal panel of a plurality of dots, an X drive circuit for supplying display information of at least one line to the liquid crystal panel and a Y drive circuit for selecting one-dot data for each line of the liquid crystal panel, the X drive circuit and the Y drive circuit enabling energization of the liquid crystal panel. A plurality of memories are provided for receiving a plurality of bits of information data and for storing at least M dot display information data so as to enable display of a respective line of the liquid crystal panel, M being an integer. A selection arrangement is provided for selecting one bit of display information data out of a plurality of bits of display information data to be read out of the memories and a selection controller is provided for specifying the one bit of display information data to be selected by the selection arrangement so as to enable read out of each one bit of the plurality of bits in a predetermined time sequence corresponding to one horizontal perioid divided by N for display, where N is an integer of at least two. The X drive circuit is supplied one dot information at leat two times during the one horizontal period so that one dot is controlled for display at least two times during the one horizontal period to enable multi-level tone display.

REFERENCES:
patent: 4709995 (1987-12-01), Kuribayashi et al.
patent: 4779083 (1988-10-01), Ishii et al.
patent: 4908710 (1990-03-01), Wakai et al.
patent: 5053764 (1991-10-01), Barbier et al.

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