Method and apparatus for presenting wave forms on a liquid...

Details Method and apparatus for presenting wave forms on a liquid... Method and apparatus for presenting wave forms on a liquid...

G - Physics

01

R

375/33

G01R 13/20 (2006.01) G01R 13/40 (2006.01) G02F 1/1345 (2006.01) H05K 3/32 (2006.01) H05K 3/36 (2006.01)

Patent

CA 1249678

ABSTRACT OF THE DISCLOSURE 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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