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IMPROVED LIQUID CRYSTAL DISPLAY ELECTRODES

IP.com Disclosure Number: IPCOM000024327D
Original Publication Date: 1980-Apr-30
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 82K

Publishing Venue

Xerox Disclosure Journal

Abstract

In a liquid crystal matrix addressed display system, the displayed characters are formed between the apparent intersections of a horizontal and a vertical series of striped electrodes. This configuration is shown in Figure 1. The resulting character in the case of a 5 by 9 line character matrix is shown in Figure lA, which is the result of composing the character from a series of squares fixed in location by the matrix. The image created by the squares suffers from legibility due to the impossibility of having the squares reproduce the curves of the letter or the diagonal portions without a "staircase effect".

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L 'EROX DISCLOSURE JOURNAL

IMPROVED LIQUID CRYSTAL DISPLAY ELECTRODES
Joseph F. Stephany

Proposed Classification
U.S. C1. 350/159 Int. C1. G02b 5/30

FIG. 1

FIG. 2

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FIG. /A

FIG. 2A

In a liquid crystal matrix addressed display system, the displayed characters are formed between the apparent intersections of a horizontal and a vertical series of striped electrodes. This configuration is shown in Figure 1. The resulting character in the case of a 5 by 9 line character matrix is shown in Figure lA, which is the result of composing the character from a series of squares fixed in location by the matrix. The image created by the squares suffers from legibility due to the impossibility of having the squares reproduce the curves of the letter or the diagonal portions without a "staircase effect".

Volume 5 Number 2 March/April 1980 197

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IMPROVED LIQUID CRYSTAL DISPLAY ELECTRODES (Cont'd)

In order to improve the legibility of the character, at least one of the striped electrodes is formed into a series of circles connected by a much thinner stripe. The center of each formed circle coincides with the center of the striped electrode below it as shown in Figure 2. The resulting character is shown in Figure 2A. The improved readability is obvious. Where either curves or sloping lines occur an improvement is noted in ease of reading. It is also observed that the vertical and horizonta...