The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 15, 1994
Filed:
Jan. 31, 1991
Robert S Benward, Huntington Station, NY (US);
Parker Hannifin Corporation, Cleveland, OH (US);
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.