Touch panel with a contact conductive layer comprising a phototransparent organic conductive film

• US 5,986,223 A
• Filed: 03/28/1996
• Issued: 11/16/1999
• Est. Priority Date: 12/19/1995
• Status: Expired due to Fees

• Current Assignee: Samsung Display Devices Co., Ltd. (Samsung SDI Company Limited)
• Original Assignee: Samsung Display Devices Co., Ltd. (Samsung SDI Company Limited)
• Inventors: Kim, Hyeongdong
• Primary Examiner(s): Shankar, Vijay
• Application Number:
  US08/623,420
• Time in Patent Office: 1,328 Days
• Field of Search: 178/18.01, 178/18.03, 178/18.05, 178/18.07, 345/173, 345/174
• US Class Current: 178/18.01
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

This invention relates to a touch panel with improved resistance property to resolve problems of conductive layer crack by manufacturing a touch panel comprising a combined conductive film by a film coated with a conductive layer in the touch panel structure which is substituted with a phototransparent organic conductive film. It also has an economical advantage that it can be used perpetually if the conductive film in the lower part is not impaired.

Claims

1. A touch panel, comprising:

a substrate comprising a transparent insulated material;

a substrate conductive layer formed on said substrate;

a contact conductive layer comprising a phototransparent organic conductive film; and

a dot space formed between said substrate conductive layer and said contact conductive layer.

2. The touch panel of claim 1 wherein said contact conductive layer further comprises a phototransparent conductive coating layer on one or both sides of the phototransparent organic conductive film.

3. The touch panel of claim 1 wherein said contact conductive layer further comprises a protective film layer on said phototransparent organic conductive film.

4. The touch panel of any one of claim 1 to claim 3 wherein said contact conductive layer further comprises a hardcoating layer on the surface thereof.

5. The touch panel of claim 1 wherein said phototransparent organic conductive film comprises a white powder metal oxide dispersed in polymer with a resistance substantially between 300-800 Ω

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.

6. The touch panel of claim 5 wherein said metal oxide is selected from the group consisting of indium oxide, antimony oxide, and tin oxide.

7. The touch panel of claim 2 wherein said phototransparent conductive coating layer comprises an indium tin oxide layer.

8. A touch panel comprising:

a substrate having a transparent insulated material;

a substrate conductive layer formed on the substrate;

a contact conductive layer comprising a phototransparent organic conductive film having metal oxide powder dispersed in polymer, said contact conductive layer being disposed above the substrate conductive layer to form a gap therebetween; and

a plurality of dot spaces formed in the gap.