LCD driver circuit

Details LCD driver circuit LCD driver circuit

1992-03-25

1993-12-14

Hjerpe, Richard

Communications: electrical

Land vehicle alarms or indicators

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

340784, 340811, G09G 500

Patent

active

052706966

ABSTRACT:
Disclosed herein is an LCD driver circuit comprising a plurality of cascade-connected LCD drivers. The LCD driver circuit can be activated to make a latch pulse signal input thereto active on the trailing edge thereof and operated even if a corresponding clock pulse signal is input in confronting relationship during a period in which the latch pulse signal is being input. Each of the LCD drivers has a latch pulse control circuit for selecting either one of a first latch pulse signal and a second latch pulse signal generated corresponding to the first latch pulse signal in accordance with an enable signal input at the time the LCD drivers are cascaded, thereby controlling an enable latch circuit and a shift register.

REFERENCES:
patent: 4005404 (1977-01-01), Soobik
patent: 4538145 (1985-08-01), Mitani et al.
patent: 4799057 (1989-01-01), Takeda et al.
patent: 5021775 (1991-06-01), Babin
patent: 5047759 (1991-09-01), Takebe et al.
patent: 5162786 (1992-11-01), Fukuda
patent: 5164970 (1992-11-01), Shin et al.
IBM Technical Disclosure Bulletin Dec. 1988 "Sequence Detect Latch Trigger", pp. 90-92.

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