Touch panel

• US 5,777,606 A
• Filed: 02/25/1997
• Issued: 07/07/1998
• Est. Priority Date: 01/27/1995
• Status: Expired due to Term

• Current Assignee: Fujitsu Component Limited (Fujitsu Limited)
• Original Assignee: Fujitsu Limited
• Inventors: Kurashima, Shigemi, Sakaguchi, Akihiko, Kurasawa, Katsuhiro
• Primary Examiner(s): Hjerpe, Richard A.
• Assistant Examiner(s): CHANG, KENT WU
• Application Number:
  US08/805,774
• Time in Patent Office: 497 Days
• Field of Search: 345/104, 345/87, 345/156, 345/173, 345/174, 345/175, 345/176, 349/12, 349/23
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A touch panel includes a display unit having display elements which are arranged in a first lattice, and an input panel, put on the display unit, having a structure in which transparent resistive films maintained at a predetermined distance by insulating dot spacers are provided on a transparent substrate, the insulating dot spacers being arranged in a second lattice, wherein a relative angle Θ between a direction in which the display elements are arranged in the first lattice and a direction in which the insulating dot spacers are arranged in the second lattice falls in a range of 15°≦Θ≦30°.

Claims

1. A touch panel comprising:

a display unit having display elements which are arranged in a first lattice; and

an input panel, disposed on said display unit, having a structure comprising transparent resistive films maintained at a predetermined distance by insulating dot spacers and provided on a transparent substrate, the insulating dot spacers being arranged in a second lattice, wherein a relative angle Θ

between a direction in which the display elements are arranged in the first lattice and a direction in which the insulating dot spacers are arranged in the second lattice falls in a range of;

space="preserve" listing-type="equation">0°

<

Θ

<

15°

,

wherein a value "a" (a≧

0) representing a relationship between a lattice interval of the first lattice and a lattice interval of the second lattice satisfies a condition of ##EQU8## the lattice interval being an interval between adjacent lines of the lattice, the lattice intervals of the first lattice and the second lattice respectively having values d and d(1+a) or d(1+a) and d.