LARGE-SIZE TOUCH SCREEN

• US 20110216020A1
• Filed: 10/08/2010
• Published: 09/08/2011
• Est. Priority Date: 03/02/2010
• Status: Abandoned Application

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Park, Ho Joon, Lee, Jong Young, Kim, Sang Hwa, Oh, Yong Soo
• Application Number:
  US12/901,142
• Publication Number:
  US 20110216020A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

Disclosed herein is a touch screen, including: a transparent film having a thickness of 188˜2000 μm; and a transparent electrode layer formed on one side or both sides of the transparent film, wherein one side or both sides of the transparent film is ultraviolet-treated, high-frequency-treated or primer-treated. The touch screen is advantageous in that a hard coating layer included in conventional touch screens was removed thereby improving its transmittance, and in that the number of total structural layers was decreased to strengthen its price competitiveness. Further, the touch screen is advantageous in that a hard coating layer was removed which reduces the manufacturing process, and in that the thickness of a base film was increased allowing touch screens having a size of 22 inches or more to be manufactured.

Claims

1. A touch screen, comprising:

a transparent film having a thickness of 188˜

2000 μ

m; and

a transparent electrode layer formed on one side or both sides of the transparent film,

wherein one side or both sides of the transparent film is ultraviolet-treated, high-frequency-treated or primer-treated.

2. The touch screen according to claim 1, wherein the transparent electrode layer is formed by a printing process.

3. The touch screen according to claim 1, wherein the transparent electrode layer is made of poly-3,4-ethylenedioxythiophene/polystyrenesulfonate (PEDOT/PSS).

4. The touch screen according to claim 1, wherein the transparent electrode layer is made of a conductive polymer composition including a liquid crystal polymer and poly-3,4-ethylenedioxythiophene/polystyrenesulfonate (PEDOT/PSS).

5. The touch screen according to claim 1, wherein the transparent electrode layer is formed of a conductive adhesive prepared by mixing a transparent adhesive with one or more selected from a conductive polymer (for example, poly-3,4-ethylenedioxythiophene/polystyrenesulfonate, manufactured by Bayer Corp. or AGFA Corp., or polyaniline), carbon nanotubes, carbon black, graphene, metal or silver nanowires, copper (Cu), indium tin oxide (ITO) and antimony tin oxide (ATO).

6. The touch screen according to claim 4, wherein the liquid crystal polymer is an acrylic liquid crystal polymer.

7. The touch screen according to claim 4, wherein a conductive polymer film made of the conductive polymer composition has a surface resistance of 10˜

1000 Ω

/□

.

8. The touch screen according to claim 4, wherein the liquid crystal polymer is 1,4-bis[3-(acryloyloxy)propyloxy]-2-methyl benzene.

9. The touch screen according to claim 1, wherein the transparent film includes one or more selected from a hard coating layer, an anti-fingerprint (AF) layer, an anti-glare (AG) layer and an anti-reflection (AR) layer formed on the outer surface thereof.

10. The touch screen according to claim 1, wherein the transparent film is made of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyether sulfone (PES), glass, reinforced glass, polycarbonate (PC), cycloolefin copolymer (COC), polymethylmethacrylate (PMMA), triacetylcellulose (TAC), K-resin-containing biaxially-oriented polystyrene (BOPS), or a mixture thereof.

11. The touch screen according to claim 1, wherein the transparent film is any one selected from a polyethylene terephthalate (PET) film having a dielectric constant of 2.9˜

3.5, a glass film having a dielectric constant of 7.5˜

8.0, a silicon film having a dielectric constant of 2.5˜

7.0, a urethane film having a dielectric constant of 6.5˜

7.0, a polymethylmethacrylate (PMMA) film having a dielectric constant of 2.5˜

4.5, and a polycarbonate (PC) film having a dielectric constant of 2.5˜

3.5.

12. The touch screen according to claim 1, wherein the transparent film further includes a silver (Ag) electrode layer at an edge thereof.

13. The touch screen according to claim 12, wherein the silver (Ag) electrode layer is formed by a printing process.