# US 4,392,717 A · Liquid crystal display device

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- Number: US 4,392,717 A
- Document ID: US4392717A
- Status: Granted
- Kind: A
- Application number: 06/223,289
- Filed: 1981-01-08
- Granted: 1983-07-12
- Earliest claimed: 1980-01-23
- Assignees: Hitachi, Ltd.
- Inventors: Yoshimichi Shibuya; Masami Takahashi
- Web page: https://patentgrep.com/patent/US4392717A

## CPC

- G02F 1/1345: Conductors connecting electrodes to cell terminals
- G04G 9/06: using light valves, e.g. liquid crystals
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G04G: ELECTRONIC TIME-PIECES

## Abstract

A liquid crystal display device comprises a pair of upper and lower substrates disposed in opposition to each other with upper and lower electrode patterns being formed on the inner surfaces of the substrates, respectively. A part or all of cross-over portions of wiring conductors of the upper and the lower electrode patterns are disposed within an effective display region with the width of the wiring conductors being reduced at the cross-over portions. The cross-over portions disposed within the effective display region are located with a predetermined distance from a display pattern to be produced. A failure such as a short-circuit formed between the upper and the lower electrode patterns is significantly reduced, while the area of the active display region can be increased.

## Claims

### Claim 1

A liquid crystal display device comprising a pair of opposing upper and lower substrates having a liquid crystal filled therebetween and coupled to each other through an electrically insulative sealing material at the peripheral portions thereof, said upper and lower substrates being provided with upper and lower electrode patterns including wiring conductors on respective surfaces facing oppositely to each other, the wiring conductors of said upper and lower electrode patterns having cross-over portions which overlap each other between said upper and lower substrates, wherein at least a part of the cross-over portions of the wiring conductors of said upper and lower electrode patterns is disposed within an effective display region of said liquid crystal display device enclosed by said sealing material, and each of the cross-over portions of the wiring conductors of said upper and lower electrode patterns disposed within said effective display region has a width smaller than that of the remaining portion of the respective wiring conductors.

### Claim 2 (depends on 1)

A liquid crystal display device according to claim 1, wherein said cross-over portions disposed within said effective display region are located at positions spaced outwardly from a display pattern to be produced.

### Claim 3 (depends on 1, 2)

A liquid crystal display device according to claim 1 or 2, wherein the smaller width of each of the cross-over portions of the wiring conductors of said upper and lower electrode patterns is in a range of 20 .mu.m to 70 .mu.m.

### Claim 4 (depends on 1)

A liquid crystal display device according to claim 1, wherein each of the cross-over portions of the wiring conductors of said upper and lower electrode patterns disposed within said effective display region is bisected.