TRANSPARENT ELECTRODE FILM STRUCTURE AND TOUCH SCREEN

• US 20130215068A1
• Filed: 02/23/2012
• Published: 08/22/2013
• Est. Priority Date: 03/17/2011
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Jeon, Seongman, Kim, Mangeun, Shin, Hyunkwon, Kim, Sangcheon
• Application Number:
  US13/881,153
• Publication Number:
  US 20130215068A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G02B 1/08 made of polarising materials
• CPC Class Codes: G02B 1/111 using layers comprising organic materials
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/044 by capacitive means

Abstract

Disclosed is a transparent electrode film structure and a touch screen, the structure including a retarder film, first and second hard coating layers coated on both surfaces of the retarder film, an optical layer formed on the second hard coating layer, and a transparent electrode film formed on the optical layer.

Claims

1. A transparent electrode film structure, the structure comprising:

a retarder film;

an optical layer formed on the retarder film; and

a transparent electrode film formed on the optical layer and consisting of a conductive polymeric film or a graphene.

2. The structure of claim 1, further comprising first and second hard coating layers coated on both surfaces of the retarder film, wherein the optical layer is formed on any one layer of the first and second hard coating layers.

3. The structure of claim 1, wherein the optical layer has a stacked structure with at least two or more layers.

4. The structure of claim 3, wherein the stacked optical layer is alternately stacked with a high refractive layer and a low refractive layer.

5. The structure of claim 1, wherein the retarder film is a COP (Cyclic Olefin Polymer) film or a COC (Cyclic Olefin Copolymer) film.

6. A touch screen, the touch screen comprising:

a first retarder;

a laminate structure formed on the first retarder and including a transparent electrode formed with any one of an Ag-wire ink, a conductive polymer and a graphene formed on at least one or more isotropic films;

a second retarder formed on the laminate structure;

a touch panel including a polarizer formed on the second retarder; and

a display panel coupled to a first retarder side of the touch panel.

7. The touch screen of claim 6, wherein the first retarder is further formed with a PMMA layer, and the display panel is separated from or bonded to the PMMA layer.

8. The touch screen of claim 6, wherein the first retarder or the second retarder is any one of a 1λ

/4 plate, a 1λ

/2 plate and a 3λ

/4 plate.

9. The touch screen of claim 6, wherein the first retarder or the second retarder is a COP (Cyclic Olefin Polymer) film or a COC (Cyclic Olefin Copolymer) film.

10. The touch screen of claim 6, wherein light incident from outside is converted to a circularly polarized light of any one direction while passing the polarizer and the second retarder.

11. The touch screen of claim 10, wherein the second retarder converts a light reflected from the light incident from the outside to a linear polarized light.

12. The touch screen of claim 6, wherein light emitted from the display panel is converted to a circularly polarized light of any one direction while passing the first retarder, and converted to a linear polarized light parallel with a polarizing axis of the polarizer while passing the second retarder.

13. A touch screen, the touch screen comprising:

an isotropic film;

a first retarder positioned at an upper surface of the isotropic film;

a second retarder positioned at an upper surface of the first retarder;

a transparent electrode formed on each of the isotropic film, the first retarder and the second retarder with any one of Ag-wire ink, a conductive polymer and a graphene;

a touch panel including a polarizer formed on an upper surface of the second retarder; and

a display panel coupled to the touch panel.

14. The touch screen of claim 13, wherein the isotropic film is further formed with a PMMA layer, and the display panel is separated from or bonded to the PMMA layer.

15. The touch screen of claim 13, wherein a transparent electrode is interposed between the first retarder and the second retarder, between the second retarder and the isotropic film and between the isotropic film and the PMMA layer.

16. The touch screen of claim 13, wherein the first retarder or the second retarder is any one of a 1λ

/4 plate, a 1λ

/2 plate and a 3λ

/4 plate.

17. The touch screen of claim 13, wherein the first retarder or the second retarder is a COP (Cyclic Olefin Polymer) film or a COC (Cyclic Olefin Copolymer) film.

18. The touch screen of claim 13, wherein light incident from outside is converted to a circularly polarized light of any one direction while passing the polarizer and the second retarder.

19. The touch screen of claim 13, wherein the second retarder converts a light reflected from the light incident from the outside to a linear polarized light.

20. The touch screen of claim 13, wherein light emitted from the display panel is converted to a circularly polarized light of any one direction while passing the first retarder, and converted to a linear polarized light parallel with a polarizing axis of the polarizer while passing the second retarder.