Row electrode driving circuit for a display apparatus

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

1991-10-29

1993-10-12

Howell, Janice A.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 54, 345 87, 345112, G02F 113, G09G 110

Patent

active

052530930

ABSTRACT:
An improved row electrode driving circuit can drive a matrix type display apparatus without necessitating digital signals transmitted between partial row electrode driving circuits. Each of the partial row electrode driving circuits is allocated with a number. In each of the partial row electrode driving circuits, shift register shifts a pulse 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 upper direction, a signal indicating the allocated number is produced. When the shift direction is set to the lower 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 pulse signal is output.

REFERENCES:
patent: 4383737 (1983-05-01), Hibino et al.
patent: 4656470 (1987-04-01), Saka
patent: 4727363 (1988-02-01), Ishii
patent: 4939529 (1990-07-01), Kanayama et al.
patent: 5021774 (1991-06-01), Ohwada et al.
patent: 5034735 (1991-07-01), Inoue et al.

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