Instrumentation loop-powered backlit liquid crystal display

Details Instrumentation loop-powered backlit liquid crystal display Instrumentation loop-powered backlit liquid crystal display

1988-09-27

1990-09-25

Brier, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

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

340765, 340784, 350345, 324 96, G09G 318

Patent

active

049596420

ABSTRACT:
A loop-powered, backlit liquid crystal display (LCD) responds to a current instrumentation loop for providing a current representative of the value to be measured and an LCD for displaying the measured value. A light-emitting diode (LED) circuit, which includes an LED disposed proximate to the LCD, is interconnected with, and driven by, the current of the current instrumentation loop for backlighting the LCD.

REFERENCES:
patent: 4431966 (1984-02-01), Pucciarello
patent: 4438396 (1984-03-01), Harden, Jr. et al.
patent: 4609914 (1986-09-01), Fathi
patent: 4617562 (1986-10-01), Klotz
patent: 4714983 (1987-12-01), Lang
patent: 4806854 (1989-02-01), Mayer et al.
patent: 4823078 (1989-04-01), Mohebban

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