Waveforms on a liquid crystal display

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United States of America Patent

PATENT NO 4690509
SERIAL NO

06656972

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Abstract

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Liquid crystal display for use in an oscilloscope. Analog multiplexing techniques enable displaying of waveforms of input signals with frequencies as high as 1 MHz. An xy grid is formed by two interleaved arrays of alternate parallel transparent electrodes. Use of liquid crystal material results in very low power consumption and voltage threshold, improved lifetime, a wide viewing angle, and no image washout at high ambient light levels. Addition of a digital voltmeter, frequency counter, auto sync circuitry, dual trace, and movable cursor expands the capabilities of the display. A gray scale surrounds the actual null points on the display, allowing suitable resolution with a minimum of channels.

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Patent Owner(s)

Patent OwnerAddress
CONTROL INTERFACE CORPORATION A NEW JERSEY CORP6 EMERY AVENUE RANDOLPH NJ 07869

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bohmer, William Flanders, NJ 33 985

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