HYBRID TOUCH SENSING ELECTRODE AND TOUCH SCREEN PANEL COMPRISING SAME

• US 20160299630A1
• Filed: 11/17/2014
• Published: 10/13/2016
• Est. Priority Date: 11/20/2013
• Status: Abandoned Application

• Current Assignee: Dongwoo Fine-Chem Co., Ltd. (Sumitomo Chemical Company Ltd.)
• Original Assignee: Dongwoo Fine-Chem Co., Ltd. (Sumitomo Chemical Company Ltd.)
• Inventors: LEE, Cheol Hun, PARK, Dong Pil, YANG, Min Soo, LEE, Jae Hyun
• Application Number:
  US15/038,085
• Publication Number:
  US 20160299630A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04102 Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 2211/902 Spectral purity improvement for digital function generators by adding a dither signal, e.g. noise
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

Disclosed are a hybrid touch sensing electrode including first sensing patterns adhered to a first optical functional layer, and second sensing patterns adhered to a second optical functional layer, wherein the first and second optical functional layers have a dielectric constant/thickness value of 0.01 to 0.09 1/μm, respectively, and a sum of the dielectric constants of the first and second optical functional layers is 6 to 11, and thereby, the touch sensing electrode may be formed in a thin film structure with improved touch sensitivity while having reduced noise, as well as a touch screen panel including the same.

Claims

1. A hybrid touch sensing electrode comprising:

first sensing patterns adhered to a first optical functional layer, and second sensing patterns adhered to a second optical functional layer,

wherein the first and second optical functional layers have a dielectric constant/thickness value of 0.01 to 0.09 1/μ

m, respectively, and a sum of the dielectric constants of the first and second optical functional layers is 6 to 11.

2. The hybrid touch sensing electrode according to claim 1, wherein the first optical functional layer has a dielectric constant of 3.2 to 6.0, and the second optical functional layer has a dielectric constant of 2.8 to 5.0.

3. The hybrid touch sensing electrode according to claim 1, wherein the first optical functional layer has a thickness of 35 to 320 μ

m, and the second optical functional layer has a thickness of 30 to 280 μ

m.

4. The hybrid touch sensing electrode according to claim 1, wherein the first optical functional layer and the second optical functional layer are independently included in the touch screen panel.

5. The hybrid touch sensing electrode according to claim 1, wherein a dielectric constant/distance value between the first sensing patterns and the second sensing patterns is 0.01 to 0.25 1/μ

m.

6. The hybrid touch sensing electrode according to claim 1, wherein a distance between the first sensing patterns and the second sensing patterns is 12 to 300 μ

m.

7. The hybrid touch sensing electrode according to claim 1, wherein a dielectric constant between the first sensing patterns and the second sensing patterns is 2.8 to 5.0.

8. The hybrid touch sensing electrode according to claim 1, wherein the first optical functional layer and the second optical functional layer are selected from a group consisting of a cover window, a polarization plate and a retarder, but are not the same as each other.

9. The hybrid touch sensing electrode according to claim 8, wherein the polarization plate is a single polarizer layer or a laminate in which a protective film is adhered to at least one surface of the polarizer.

10. The hybrid touch sensing electrode according to claim 9, wherein the polarizer and the protective film included in the laminate polarization plate are an individual optical functional layer, respectively.

11. The hybrid touch sensing electrode according to claim 8, wherein the retarder is a single layer or a laminate in which a hardened liquid crystal film is adhered to one surface of a substrate.

12. The hybrid touch sensing electrode according to claim 11, wherein the substrate and the hardened liquid crystal film included in the laminate retarder are an individual optical functional layer, respectively.

13. The hybrid touch sensing electrode according to claim 1, wherein the first sensing patterns and the second sensing patterns are formed on different planes from each other.

14. The hybrid touch sensing electrode according to claim 1, wherein the first sensing patterns and the second sensing patterns are not provided with additional insulation.

15. The hybrid touch sensing electrode according to claim 1, wherein both of refractive index differences between the first optical functional layer and the first sensing patterns, and between the second optical functional layer and the second sensing patterns are 0.8 or less.

16. The hybrid touch sensing electrode according to claim 1, wherein the sensing patterns have a refractive index of 1.3 to 2.5.

17. A touch screen panel comprising the hybrid touch sensing electrode according to claim 1.

18. The touch screen panel according to claim 17, wherein, when one of the first optical functional layer and the second optical functional layer included in the hybrid touch sensing electrode is a retarder, and an optical functional film is adhered to an upper portion of the retarder by an adhesive agent, a refractive index difference between the sensing patterns formed on an upper side based on the retarder and an upper adhesive agent layer is 0.3 or less.

19. The touch screen panel according to claim 17, wherein, when one of the first optical functional layer and the second optical functional layer included in the hybrid touch sensing electrode is a retarder, and an optical compensation film is adhered to an upper portion of the retarder by an adhesive agent, a refractive index difference between the sensing patterns formed on a lower side based on the retarder and an upper adhesive agent layer is 0.8 or less.

20. The touch screen panel according to claim 17, wherein the touch screen panel is adhered to a flexible display.