Display Device

• US 20090079706A1
• Filed: 09/25/2008
• Published: 03/26/2009
• Est. Priority Date: 09/26/2007
• Status: Abandoned Application

• Current Assignee: Japan Display Incorporated
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated)
• Inventors: Higuchi, Takayuki, Kobayashi, Setsuo, Mishima, Yasuyuki
• Application Number:
  US12/237,434
• Publication Number:
  US 20090079706A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 2202/023 curable
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements

Abstract

In a display device having a touch panel, it is possible to prevent the generation of a screen defect caused by the intrusion of air bubbles into a UV curing resin formed between a touch panel and a display panel. The touch panel is constituted of an upper transparent-electrode-attached film and a lower transparent-electrode-attached film, and an air hole is formed in the lower transparent-electrode-attached film. Due to such constitution, in adhering the touch panel and the display panel to each other in a vacuum using a UV curing resin, air in the touch panel is also discharged and hence, there is no possibility that the touch panel swells. Accordingly, it is possible to prevent warping of the lower transparent-electrode-attached film and hence, in curing the UV curing resin for adhering the touch panel and the display panel to each other, it is possible to prevent the entanglement of air into the UV curing resin. Accordingly, a touch-panel attached display device free from a screen defect attributed to air bubbles can be manufactured.

Claims

1. A display device which mounts a touch panel on a display panel, wherein

the touch panel is constituted of an upper transparent-electrode-attached film and a lower transparent-electrode-attached film,

a gap is formed between the upper transparent-electrode-attached film and the lower transparent-electrode-attached film, and

an air hole is formed in the lower transparent-electrode-attached film of the touch penal.

2. A display device according to claim 1, wherein a light blocking film is formed outside a display region of the touch panel so as to cover the air hole with the light blocking film.

3. A display device according to claim 1, wherein a plurality of air holes is formed in the lower transparent-electrode-attached film.

4. A display device according to claim 1, wherein a flexible printed circuit board is mounted on a TFT substrate of the display panel, and the air hole is formed in a short side of the touch panel where a flexible printed circuit board is not mounted on the TFT substrate.

5. A display device according to claim 1, wherein the air hole is closed.

6. A display device according to claim 1, wherein the air hole is closed with a sealing tape.

7. A display device according to claim 1, wherein the air hole is closed with a resin.

8. A display device according to claim 1, wherein the display panel and the touch panel are arranged in the inside of a mold, and the air hole formed in the lower transparent-electrode-attached film of the touch panel is closed with an adhesive layer which adheres the mold and the touch panel to each other.

9. A display device which mounts a touch panel on a display panel, wherein

the touch panel is constituted of an upper transparent-electrode-attached film and a lower transparent-electrode-attached film,

a gap is formed between the upper transparent-electrode-attached film and the lower transparent-electrode-attached film,

unevenness is formed on a surface of a transparent electrode formed on an inner side of the upper transparent-electrode-attached film or on a surface of a transparent electrode formed on an inner side of the lower transparent-electrode-attached film, and

an air hole is formed in the lower transparent-electrode-attached film of the touch penal.

10. A display device according to claim 9, wherein the unevenness is formed on the surface of the transparent electrode formed on the inner side of the upper transparent-electrode-attached film and on the surface of the transparent electrode formed on the inner side of the lower transparent-electrode-attached film.

11. A display device which mounts a touch panel on a display panel, wherein

the touch panel is constituted of an upper transparent-electrode-attached film and a lower transparent-electrode-attached film,

a gap is formed between the upper transparent-electrode-attached film and the lower transparent-electrode-attached film,

the touch panel and the display panel are adhered to each other using an UV curing resin, and

an air hole is formed in the lower transparent-electrode-attached film of the touch penal.

12. A display device according to claim 11, wherein beads having refractive index different from refractive index of the UV curing resin are dispersed in the UV curing resin.