LIQUID-CRYSTAL DISPLAY DEVICE AND METHOD OF MAKING

• US 3,814,501 A
• Filed: 12/04/1972
• Issued: 06/04/1974
• Est. Priority Date: 12/04/1972
• Status: Expired due to Term

• Current Assignee: Henry Claude Schindler
• Original Assignee: Henry Claude Schindler
• Inventors: Schindler, Henry Claude
• Primary Examiner(s): Bauer, Edward S.
• Application Number:
  US05/311,773
• Time in Patent Office: 547 Days
• Field of Search: 350/16LC
• US Class Current: 349/113
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: G02F 1/134327 Segmented, e.g. alpha numeric display

Abstract

Disposed on the inner surface of the rear substrate of the device are a plurality of rear electrodes, each made of a lightreflective electrically-conductive material, and a plurality of electrical leads extending therefrom. Directly opposite each rear electrode is an identically-shaped front electrode disposed on the inner surface of the front substrate and made of a transparent conductive material. The remainder of the inner surface of the front substrate is coated with a reflective conductive material. Preferably, the rear electrodes are formed by depositing aluminum or silver on positively-masked areas of the rear-substrate inner surface; and the front electrodes are formed by depositing a continuous coating of indium oxide or tin oxide on the front-substrate inner surface, and then depositing aluminum or silver on negatively-masked areas of the oxide coating.

Claims

1. A liquid-crystal display device comprising a front transparent substrate, a rear substrate, and a liquid-crystal material therebetween, a. said front substrate having an inner surface, at least one portion of which has a transparent conductive material thereon and the remainder of which has a reflective material thereon;

and b. a reflective conductive material on the inner surface of said rear substrate having the same configuration as and being aligned with said one portion of said front-substrate inner surface.

2. The device of claim 1, comprising on said rear-substrate inner surface a conductive material extending from said reflective conductive material.

3. A liquid-crystal display device comprising a front transparent substrate, a rear substrate, and a liquidcrystal material therebetween, a. said front substrate having an inner surface, each of a plurality of discrete portions of which has a transparent conductive material thereon and the remainder of which has a reflective material thereon;

and b. a plurality of reflective conductive material portions on the inner surface of said rear substrate each having the same configuration as and being aligned with a different one of said discrete portions of said front-substrate inner surface.

4. The device of claim 3, wherein each of at least two of said reflective conductive material portions on said rear-substrate inner surface haS the shape of a character segment.

5. The device of claim 4, wherein at least two conductive leads, each in contact with a different one of said character-segment-shaped portions, are also disposed on said rear-substrate inner surface.