Touch panel

• US 4,672,153 A
• Filed: 01/16/1986
• Issued: 06/09/1987
• Est. Priority Date: 01/16/1985
• Status: Expired due to Term

• Current Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Original Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Inventors: Kikuchi, Hiroshi
• Primary Examiner(s): SCHREYER, STAFFORD
• Application Number:
  US06/819,914
• Time in Patent Office: 509 Days
• Field of Search: 178/18, 178/19, 178/20, 29/592 R, 29/622, 29/830, 29/831, 340/719, 156/300, 156/313
• US Class Current: 178/18.09
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: Y10T 29/49105 Switch making

Abstract

A light-transmissive touch panel is disclosed which comprises a substrate, upper and lower electrode sheets, and a transparent double adhesive tape at least between the lower electrode sheet and the substrate so as to be superposed all over their surfaces, the transparent double adhesive tape having a refractive index proximate to those of the lower sheet of the substrate.

Claims

1. In a light transmissive touch panel comprising in lamination an upper electrode sheet, a lower electrode sheet, and a substrate, further provision of a transparent, double adhesive tape at least between said lower electrode sheet and said substrate to be superposed at least all over the operational-part surfaces of said sheet and said substrate, said transparent, double adhesive tape having a refractive index approximate to the indexes of said lower electrode sheet and said substrate.

2. A touch panel defined in claim 1 wherein said transparent, double adhesive tape is provided between said lower electrode sheet and said substrate so that no air layer remains therebetween.

3. A touch panel defined in claim 1 wherein a transparent indication sheet overlies said upper electrode sheet through the intermediation of a transparent, double adhesive tape so that no air layer remains between said transparent indication sheet and said upper electrode sheet, and a transparent shield plate is provided on the underside of said substrate through the intermediation of another transparent, double adhesisve tape so that no air layer remains between said substrate and said transparent shield plate.