Planar heater for liquid crystal element

• US 4,584,461 A
• Filed: 01/19/1983
• Issued: 04/22/1986
• Est. Priority Date: 01/22/1982
• Status: Expired due to Term

• Current Assignee: Stanley Electric Company Limited
• Original Assignee: Stanley Electric Company Limited
• Inventors: Yoshida, Mitsunari, Teshima, Toru, Ariga, Kazuo
• Primary Examiner(s): Albritton, C. L.
• Assistant Examiner(s): Walberg, Teresa J.
• Application Number:
  US06/459,239
• Time in Patent Office: 1,189 Days
• Field of Search: 219/209, 219/210, 219/202, 219/219, 219/220, 219/203, 219/345, 219/552, 219/553, 219/543, 338/206, 338/208, 350/351, 350/331 R, 350/331 T
• US Class Current: 219/209
• CPC Class Codes: G02F 1/133382 Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
• CPC Class Codes: H05B 3/84 Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields

Abstract

A planar heater for a liquid crystal element includes a thin metal plate having a relatively high specific resistance such as stainless, nichrome, nickel-chrome iron alloy, etc. The thin metal plate is subjected to etching-working to form a mesh-like heat generating body, opposite ends of which are provided with terminal portions for connection into an electrical circuit.

Claims

1. A planar heater directly affixed to one major surface of a liquid crystal element characterized in that a very thin highly flexible metal plate having a relatively high specific resistance is subjected to etching-working to form a mesh-like heat generating body, opposite ends of which are provided with terminal portions for connection into an electrical circuit;

said mesh-like heat generating body and a permeable reflecting plate being laminated together by an ultraviolet hardening type adhesive to provide an integral configuration which is positioned adjacent said liquid crystal element.

2. A planar heater directly affixed to one major surface of a liquid crystal element characterized in that a very thin highly flexible metal plate having a relatively high specific resistance is subjected to etching-working to form a mesh-like heat generating body, opposite ends of which are provided with terminal portions for connection into an electrical circuit;

said mesh-like heat generating body and a permeable reflecting plate being laminated together by an adhesive to provide an integral configuration which is positioned adjacent said liquid crystal element.