ELECTRODES FOR LIQUID CRYSTAL DISPLAY DEVICE

• US 3,748,017 A
• Filed: 05/26/1971
• Issued: 07/24/1973
• Est. Priority Date: 06/05/1970
• Status: Expired due to Term

• Current Assignee: Izuhiko Nishimura, Kanemitsu Kubota, Katsumi Yamamura, Kouji Kakizawa, Yoshio Yamazaki
• Original Assignee: Izuhiko Nishimura, Kanemitsu Kubota, Katsumi Yamamura, Kouji Kakizawa, Yoshio Yamazaki
• Inventors: Yamamura, Katsumi, Kakizawa, Kouji, Yamazaki, Yoshio, Kubota, Kanemitsu, Nishimura, Izuhiko
• Primary Examiner(s): Bauer, Edward S.
• Application Number:
  US05/146,946
• Time in Patent Office: 790 Days
• Field of Search: 350/16LC
• US Class Current: 349/139
• CPC Class Codes: G01R 13/407 using a plurality of passive display elements, e.g. liquid crystal or Kerr-effect display elements G01R13/408 takes precedence
• CPC Class Codes: G02F 1/13439 characterised by their electrical, optical, physical properties; materials therefor; method of making
• CPC Class Codes: G04G 9/0094 using light valves, e.g. liquid crystals

Abstract

In a liquid crystal display device, gases, and in particular, H2 and O2 may be generated. Deleterious effects are avoided by incorporating in at least one of the electrodes a catalyst for the recombination of said gases.

Claims

2. A display device as defined in claim 1, wherein the other of said electrodes is transparent.

3. A display device as defined in claim 1, wherein said device has indicia thereon, said indicia being individually susceptible to change in appearance by imposition of said voltage across said electrodes.

4. A display device as defined in claim 3, wherein said device is an instrument.

5. A display device as defined in claim 3, wherein said device is a watch.

6. A display device comprising a liquid crystal material, electrodes across which a voltage may be applied and an insulating spacer, said electrodes and said spacer forming a vessel containing said material, said applied voltage serving to scatter light, said material generating hydrogen and oxygen gases on the application of said voltage, and at least one of said electrodes comprising a material selected from the group consisting of platinum black and paladium black as a catalyst effective for the recombination of said gases.