Electronic display with high spatial resolution pointer

Details Electronic display with high spatial resolution pointer Electronic display with high spatial resolution pointer

1991-01-31

1994-11-15

Weldon, Ulysses

Computer graphics processing and selective visual display system

Plural physical display element control system

Segmented display elements

345 33, 368242, 368 94, G09G 336

Patent

active

053652495

ABSTRACT:
An LCD display with a high resolution moveable pointer has a first image pane (10) with slanted conductive first segments (12) on a surface thereof. A second image pane (16) has second segments (18) and a surface thereof. The second segments are slanted opposite of the first segments. The LCD has the image panes mounted parallel to one another with the surfaces with the segments thereon facing one another with a dichroic liquid crystal material in between. A first set (26) of segments on the first image pane and a third set (30) of segments on the second pane are driven by first electrical signals of fixed amplitude and frequency. A second set of segments (28) on the first pane and a fourth set (32) on a second pane are driven by second signals 180.degree. out of phase with the first signals. A pointer is formed at an area (38) where the dichroic material is subject to an electrical potential sufficient to make the dichroic material transparent. The pointer can be moved across the display in increments as small as the width of a segment.

REFERENCES:
patent: 3275871 (1964-02-01), Yiotis
patent: 4242747 (1980-12-01), Fahrenschon
patent: 4277786 (1981-07-01), Waldron
patent: 4376934 (1983-03-01), Prohaska et al.
patent: 4815824 (1989-03-01), Sharples

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