Liquid crystal display keyboard

• US 4,527,862 A
• Filed: 12/01/1983
• Issued: 07/09/1985
• Est. Priority Date: 12/03/1982
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Arakawa, Kazuhiro
• Primary Examiner(s): Corbin, John K.
• Assistant Examiner(s): Gallivan, Richard
• Application Number:
  US06/556,992
• Time in Patent Office: 586 Days
• Field of Search: 350/331 R, 350/334, 350/332, 350/339 R
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires

Abstract

A liquid crystal display keyboard has a keyboard which is arranged on a liquid crystal display and has upper and lower conductive films each having transparent electrodes arranged in spaced and facing relation to each other. An elastic member is arranged on the upper transparent conductive film.

Claims

1. A liquid crystal display keyboard including a keyboard having upper and lower transparent conductive films each having transparent electrodes said keyboard being arranged on a liquid crystal display in a spaced and facing relation, characterized in that an elastic member is arranged on said upper transparent conductive film.

2. A liquid crystal display keyboard according to claim 1, wherein the elastic member is an elastic film and is bonded together with a protecting film therefore to an upper surface of said upper transparent conductive film.

3. A liquid crystal display keyboard according to claim 1, wherein a transparent film is bonded by an adhesive material to an upper surface of said upper transparent conductive film and a hardened layer is formed on an upper surface of said transparent film.

4. A liquid crystal display keyboard comprising:

a liquid crystal display;

a pair of transparent electrodes arranged on said liquid crystal display;

a flexible transparent film for holding one of said pair of transparent electrodes; and

a second transparent film bonded by an adhesive material to said flexible transparent film.

5. A liquid crystal display keyboard according to claim 4, wherein said second transparent film has a hardened layer formed thereon.