Column electrode driving circuit for a display apparatus

Details Column electrode driving circuit for a display apparatus Column electrode driving circuit for a display apparatus

1990-12-27

1992-11-24

Brier, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

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

340718, 340800, 340805, 340811, G09G 336

Patent

active

051666707

ABSTRACT:
An improved column electrode driving circuit can drive a matrix type display apparatus without necessitating that digital signals be transmitted between partial column electrode driving circuits. Each of the partial column electrode driving circuits is allocated with a number. In each of the partial column electrode driving circuits, a shift register shifts a sample signal to sequentially output it from a plurality of outputs. At each time when a predetermined number of clock pulses have been counted, a count signal is produced. When the shift direction is set to the right direction, a signal indicating the allocated number is produced. When the shift direction is set to the left direction, a signal indicating a number, which is obtained by subtracting the allocated number from a specified number, is produced. When this number and the clock pulse count number satisfy a predetermined relationship, the sample signal is output.

REFERENCES:
patent: 3348069 (1967-10-01), Petschauer
patent: 3378876 (1968-04-01), Goldberg et al.
patent: 4365242 (1982-12-01), Yasuda et al.
patent: 4799057 (1989-01-01), Takeda et al.
patent: 4801933 (1989-01-01), Yamamoto et al.
patent: 4825202 (1989-04-01), Dijon et al.

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