DISPLAY DEVICE HAVING TOUCH PANEL

• US 20120092292A1
• Filed: 10/11/2011
• Published: 04/19/2012
• Est. Priority Date: 10/14/2010
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated), Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Inventors: HAYAKAWA, Kouji
• Granted Patent: US 8,736,576 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• 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 3/0443 using a single layer of sensing electrodes
• 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

The present invention provides a display device having a touch panel including: a display panel; a capacitance-type touch panel arranged on the display panel; and a front panel arranged on the capacitance-type touch panel, wherein the capacitance-type touch panel includes a plurality of X-electrodes and Y-electrodes, the capacitance-type touch panel and the front panel are attached to each other at peripheral portions of the capacitance-type touch panel using adhesives, a conductive film that is provided so as to surround an effective touch area of the capacitance-type touch panel is provided on the uppermost layer of the capacitance-type touch panel, predetermined electric potential is supplied to the conductive film, and the conductive film overlaps peripheral portions of the effective touch area of the capacitance-type touch panel in planar view.

Claims

1. A display device having a touch panel comprising:

a display panel;

a capacitance-type touch panel arranged on the display panel; and

a front panel arranged on the capacitance-type touch panel,

wherein the capacitance-type touch panel includes a plurality of X-electrodes and Y-electrodes,

the capacitance-type touch panel and the front panel are attached to each other at peripheral portions of the capacitance-type touch panel using adhesives,

a conductive film that is provided so as to surround an effective touch area of the capacitance-type touch panel is provided on the uppermost layer of the capacitance-type touch panel,

predetermined electric potential is supplied to the conductive film, and

the conductive film overlaps peripheral portions of the effective touch area of the capacitance-type touch panel in planar view.

2. The display device having a touch panel according to claim 1, wherein ground electric potential is supplied to the conductive film.

3. The display device having a touch panel according to claim 1, wherein the X-electrodes and the Y-electrodes intersect with each other through a first insulating layer, pad portions and thin line portions are formed so as to be alternately arranged in extending directions of the X-electrodes and the Y-electrodes, and the pad portions of the X-electrodes and the pad portions of the Y-electrodes are arranged so as not to overlap each other in planar view.

4. The display device having a touch panel according to claim 1, wherein the X-electrodes and the Y-electrodes intersect with each other at crossed portions through the first insulating layer, the pad portions and the thin line portions are formed so as to be alternately arranged in the extending directions of the X-electrodes and the Y-electrodes, and the pad portions of the X-electrodes and the pad portions of the Y-electrodes are arranged so as not to overlap each other in planar view.

5. The display device having a touch panel according to claim 1, wherein end portions of the conductive film where the peripheral portions of the effective touch area of the capacitance-type touch panel overlap are positioned within a range of 3 mm to 5 mm of the peripheral portions of the effective touch area of the capacitance-type touch panel in planar view.

6. The display device having a touch panel according to claim 1,

wherein wirings coupled to the plurality of X-electrodes and Y-electrodes are formed outside the effective touch area of the capacitance-type touch panel, and

the end portions of the conductive film where the peripheral portions of the effective touch area of the capacitance-type touch panel overlap are positioned within a range of 5 mm from connection portions between the plurality of X-electrodes and Y-electrodes and the wirings in planar view.

7. The display device having a touch panel according to claim 1, wherein the end portions of the conductive film where the peripheral portions of the effective touch area of the capacitance-type touch panel overlap are positioned within a range of 3 mm to 5 mm from the adhesives in planar view.

8. The display device having a touch panel according to claim 1, wherein a slit is provided across the conductive film.