Touch-sensitive display device

• US 9,430,108 B2
• Filed: 06/25/2014
• Issued: 08/30/2016
• Est. Priority Date: 12/31/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Park, Mi-Ae, Kang, Sung Ku
• Primary Examiner(s): Bolotin, Dmitriy
• Application Number:
  US14/314,960
• Publication Number:
  US 20150185906A1
• Time in Patent Office: 797 Days
• Field of Search: 345173-178, 178 1801- 1811
• US Class Current: 1/1
• 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 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• 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

A touch-sensitive display device is provided. The touch-sensitive display device includes a touch panel and a display panel. A plurality of sensing electrodes is formed in the touch panel. A plurality of driving electrodes to which driving voltages are applied is formed in the display panel. The plurality of sensing electrodes is formed in predetermined patterns on one side of the touch panel, and the patterns of the plurality of sensing electrodes are different in a first sensing region and a second sensing region.

Claims

1. A touch-sensitive display device, comprising:

a touch panel comprising a plurality of sensing electrodes, wherein the plurality of sensing electrodes includes;

a plurality of first electrodes configured to sense a touch signal; and

a plurality of second electrodes configured to receive the touch signal and to transmit the received touch signal to a driving circuit; and

a display panel comprising a plurality of driving electrodes, wherein driving voltages are applied to the plurality of driving electrodes,

wherein the plurality of sensing electrodes is formed in predetermined patterns on one side of the touch panel, and a pattern of the plurality of sensing electrodes in a first sensing region is different from that of the plurality of sensing electrodes in a second sensing region, and

wherein at least one of the plurality of first electrodes and the plurality of second electrodes is disposed in a plurality circular shapes or a plurality of oval shapes in at least one of the first sensing region and the second sensing region.

2. The touch-sensitive display device of claim 1, wherein:

about two hundred first electrodes and about two hundred second electrodes are formed per unit area of 9 cm² in the first sensing region.

3. The touch-sensitive display device of claim 1, wherein:

pitches between the plurality of second electrodes in the first sensing region are smaller than pitches between the plurality of second electrodes in the second sensing region.

4. The touch-sensitive display device of claim 3, wherein:

the plurality of second electrodes is disposed in the plurality circular shapes or the plurality of oval shapes in the first sensing region.

5. The touch-sensitive display device of claim 4, wherein:

the plurality of first electrodes is disposed in directions crossing the directions of the plurality of second electrodes such that the plurality of first electrodes and the plurality of second electrodes are substantially orthogonal in portions of the first sensing region.

6. The touch-sensitive display device of claim 1, wherein:

pitches between the plurality of first electrodes in the first sensing region are smaller than pitches between the plurality of first electrodes in the second sensing region.

7. The touch-sensitive display device of claim 6, wherein:

the plurality of first electrodes is disposed in the plurality of circular shapes or the plurality of oval shapes in the first sensing region.

8. The touch-sensitive display device of claim 7, wherein:

the plurality of second electrodes is disposed in directions crossing the direction of the plurality of first electrodes such that the plurality of first electrodes and the plurality of second electrodes are substantially orthogonal in portions of the first sensing region.

9. The touch-sensitive display device of claim 1, wherein:

about five first electrodes and about five second electrodes are formed per unit area of 9 cm² in the second sensing region.

10. The touch-sensitive display device of claim 1, wherein:

the first sensing region is configured to recognize a conductive rod having a diameter of about 2 mm, or a unique pattern of a fingerprint.

11. The touch-sensitive display device of claim 1, wherein:

the second sensing region is configured to recognize a conductive rod having a diameter of about 6 mm.

12. The touch-sensitive display device of claim 1, wherein:

a total number of the first electrodes and the second electrodes in the touch panel is maintained when a number of first sensing regions is changed.

13. A touch panel, comprising:

a plurality of first electrodes extended in a first direction, wherein the plurality of first electrodes is configured to sense a touch signal;

a plurality of second electrodes extended in a second direction crossing the first direction, wherein the plurality of second electrodes is configured to receive the touch signal and to transmit the received touch signal to a driving circuit;

a first sensing region; and

a second sensing region,

wherein patterns of the plurality of first electrodes are different from each other in the first sensing region and the second sensing region,

wherein patterns of the plurality of second electrodes are different from each other in the first sensing region and the second sensing region, and

wherein the plurality of second electrodes is disposed in a plurality circular shapes or a plurality of oval shapes in the first sensing region.

14. The touch panel of claim 13, wherein:

pitches between the plurality of second electrodes in the first sensing region are smaller than pitches between the plurality of second electrodes in the second sensing region.

15. The touch panel of claim 13, wherein:

pitches between the plurality of first electrodes in the first sensing region are smaller than pitches between the plurality of first electrodes in the second sensing region.

16. The touch panel of claim 13, wherein:

about two hundred first electrodes and about two hundred second electrodes are formed per unit area of 9 cm² in the first sensing region.

17. The touch panel of claim 13, wherein:

the first sensing region is configured to recognize a conductive rod having a diameter of about 2 mm, or a unique pattern of a fingerprint.

18. A touch panel, comprising:

a plurality of first electrodes extended in a first direction, wherein the plurality of first electrodes is configured to sense a touch signal;

a plurality of second electrodes extended in a second direction crossing the first direction, wherein the plurality of second electrodes is configured to receive the touch signal to transmit the received touch signal to a driving circuit;

a first sensing region; and

a second sensing region,

wherein patterns of the plurality of first electrodes are different from each other in the first sensing region and the second sensing region,

wherein patterns of the plurality of second electrodes are different from each other in the first sensing region and the second sensing region, and

wherein the plurality of first electrodes is disposed in a plurality circular shapes or a plurality of oval shapes in the first sensing region.