Touch-panel with light shielding peripheral part

• US 6,814,452 B2
• Filed: 09/26/2002
• Issued: 11/09/2004
• Est. Priority Date: 03/31/2000
• Status: Active Grant

• Current Assignee: Nissha Printing Company Limited
• Original Assignee: Nissha Printing Company Limited
• Inventors: Kusuda, Yasuji
• Primary Examiner(s): SIKDER, MOHAMMAD YUNUS
• Application Number:
  US10/239,752
• Publication Number:
  US 20030090803A1
• Time in Patent Office: 775 Days
• Field of Search: 359/613, 359/609, 349/152, 349/158, 349/44, 349/110, 349/191
• US Class Current: 359/613
• CPC Class Codes: G02F 1/133 Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements arrangements or circuits for control of liquid crystal elements in a matrix, not structurally associated with these elements G09G3/36
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

Provided is a touch panel, which has a light-shielding effect in its peripheral portion and is able to improve the visibility of its screen at low cost and also cope with the thickness reduction of a product provided with an LCD with a touch panel. In an analog resistive film system touch panel, where conductive panels (1, 2) are arranged opposite to each other with transparent electrodes (12, 22) formed by a whole or a part of a transparent conductive film and wiring lines formed on one-side surfaces of transparent insulative substrates (11, 21) and one or more resin layers (4, 28, 15) are provided for various purposes in the peripheral portion located between the transparent insulative substrates, at least one layer of the resin layers additionally has a light-shielding function by being colored black.

Claims

1. An analog resistive film system touch panel comprising:

conductive panels arranged opposite to each other with transparent electrodes having a light-shielding effect in its peripheral portion being formed by a whole or a part of transparent conductive films and wiring lines formed on one-side surfaces of transparent insulative substrates; and

a resin layer comprised of one or more layers located peripherally between the transparent insulative substrates of the conductive panels arranged, opposite to each other,

wherein at least one layer of the resin layers serves as a light-shielding layer for restraining occurrence of a luminescent line in a portion located inside a screen of the conductive panel near an edge or a back-light-use or front-light-use line light source side by shielding light while being colored black.

2. The touch panel having a light-shielding effect in its peripheral portion as claimed in claim 1, wherein the light-shielding layer is an adhesion layer, which is arranged between the conductive panels and colored black so as to shield light.

3. The touch panel having a light-shielding effect in its peripheral portion as claimed in claim 1, wherein the light-shielding layer is at least one layer of wiring line overcoat layers, said at least one layer being arranged on the wiring line located in a peripheral portion of the conductive panel and colored black so as to shield light.

4. The touch panel having a light-shielding effect in its peripheral portion as claimed in claim 1, wherein the light-shielding layer is at least one layer of insulative patterning layers, said at least one layer being arranged on the transparent conductive film located in a peripheral portion of the conductive panel and colored black so as to shield light.

5. The touch panel having a light-shielding effect in its peripheral portion as claimed in claim 3, wherein the light-shielding layer is at least one layer of insulative patterning layers, said at least one layer being arranged on the transparent conductive film located in a peripheral portion of the conductive panel and colored black so as to shield light.

6. The touch panel having a light-shielding effect in its peripheral portion as claimed in claim 2, wherein the light-shielding layer is at least one layer of wiring line overcoat layers, said at least one layer being arranged on the wiring line located in a peripheral portion of the conductive panel and colored black so as to shield light.

7. The touch panel having a light-shielding effect in its peripheral portion as claimed in claim 2, wherein the light-shielding layer is at least one layer of insulative patterning layers, said at least one layer being arranged on the transparent conductive film located in a peripheral portion of the conductive panel and colored black so as to shield light.