Liquid crystal display with zener diode

Details Liquid crystal display with zener diode Liquid crystal display with zener diode

1986-08-12

1987-04-14

Corbin, John K.

Electricity: power supply or regulation systems

Remote sensing

323231, 340813, G02F 1133, G05F 318, G09G 300

Patent

active

046573470

ABSTRACT:
A liquid crystal display apparatus includes a liquid crystal display device having a plurality of display digits, a one-chip microcomputer having a plurality of voltage terminals for driving the liquid crystal display device by selectively supplying the voltages applied to those voltage terminals to the liquid crystal display device, and a power supply circuit for applying voltages to the voltage terminals, this power supply circuit having a series circuit of a plurality of resistors one end of which is connected to the first power source terminal and which has a plurality of nodes connected to the voltage terminals. The power supply circuit has a Zener diode which is connected between the other end of the series circuit and the second power source terminal and which is made operative in the saturation region.

REFERENCES:
patent: 3086160 (1963-04-01), Loftus
patent: 3613351 (1969-05-01), Walton
patent: 4044546 (1977-08-01), Koike
patent: 4507600 (1985-03-01), Okayama
patent: 4570115 (1986-02-01), Misawa
Millman et al., Electronic Devices and Circuits Sec. 6-12, pp. 143-147 McGraw Hill Book Co. 1967.

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