Touch display apparatus

• US 10,444,924 B2
• Filed: 09/18/2018
• Issued: 10/15/2019
• Est. Priority Date: 01/30/2015
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kim, Ju Han, Park, Yong Chan, Kim, Jin Seong, Kim, Seung Kyeom
• Primary Examiner(s): Sharifi-Tafreshi, Koosha
• Application Number:
  US16/134,870
• Publication Number:
  US 20190018522A1
• Time in Patent Office: 392 Days
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/134327 Segmented, e.g. alpha numeric display
• CPC Class Codes: G02F 1/13439 characterised by their electrical, optical, physical properties; materials therefor; method of making
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/13629 Multilayer wirings
• CPC Class Codes: G02F 1/136295 Materials; Compositions; Manufacture processes
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• 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 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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
• CPC Class Codes: G09G 3/3688 suitable for active matrices only
• CPC Class Codes: G09G 3/3696 Generation of voltages supplied to electrode drivers

Abstract

Disclosed is a touch sensitive display apparatus which decreases a load of each of a plurality of touch electrodes and reduces a load deviation between the plurality of touch electrodes, thereby enhancing image quality. The touch sensitive display apparatus comprises a touch sensitive panel. The touch panel comprises a plurality of touch electrodes comprising at least a first touch electrode. The first touch electrode comprises a plurality of first touch electrode lines that are parallel to each other. A first touch signal line is connected to the plurality of first touch electrode lines of the first touch electrode, and the first touch electrode is driven for image display and touch sensing via the first touch signal line. A first connecting line is in a different layer than the first touch electrode lines, and the first connecting line is connected to the plurality of first touch electrode lines.

Claims

1. A touch sensitive display apparatus comprising:

a touch sensitive display panel comprising;

a plurality of touch electrodes comprising at least a first touch electrode and a second touch electrode adjacent to the first touch electrode, the first touch electrode including one or more bridges each connecting portions of the first touch electrode to each other, and the second touch electrode including one or more bridges each connecting portions of the second touch electrode to each other;

a first conductive line connected to the first touch electrode at a first plurality of locations and overlapping with the one or more bridges of the first touch electrode, the first conductive line overlapping with the second touch electrode but not being connected to the second touch electrode, the first touch electrode driven with a common voltage for image display via the first conductive line and driven with a touch driving signal for touch sensing via the first conductive line; and

a second conductive line connected to the second touch electrode at a second plurality of locations and overlapping with the one or more bridges of the second touch electrode, the second conductive line not being connected to the first touch electrode, the second touch electrode driven with the common voltage for image display via the second conductive line and driven with the touch driving signal for touch sensing via the second conductive line.

2. The touch sensitive display apparatus of claim 1, wherein the one or more bridges of the first touch electrode include one or more first bridges each connecting the portions of the first touch electrode in a first direction.

3. The touch sensitive display apparatus of claim 2, wherein the one or more bridges of the first touch electrode include one or more second bridges each connecting the portions of the first touch electrode in a second direction different from the first direction.

4. The touch sensitive display apparatus of claim 2, wherein the first conductive line and the second conductive line also extend in the second direction.

5. The touch sensitive display apparatus of claim 1, wherein the first plurality of locations are at a first distance from the first conductive line, and the second plurality of locations are at a second distance from the second conductive line.

6. The touch sensitive display apparatus of claim 1, wherein the second conductive line overlaps with the first touch electrode.

7. The touch sensitive display apparatus of claim 1, wherein:

the touch sensitive display panel is driven by a time division method including a display period and a touch period;

the first conductive line and the second conductive line are supplied the common voltage for image display during the display period; and

the first conductive line and the second conductive line are supplied the touch driving signal for touch sensing during the touch period.

8. The touch sensitive display apparatus of claim 1, wherein the first conductive line is not overlapped with the second conductive line.

9. A touch sensitive display apparatus comprising:

a touch sensitive display panel comprising;

a plurality of pixels each including a corresponding thin film transistor;

a plurality of touch electrodes comprising at least a first touch electrode and a second touch electrode adjacent to the first touch electrode;

a first conductive line connected to the first touch electrode at a first plurality of locations and overlapping with one or more thin film transistors of one or more of the pixels corresponding to the first touch electrode; and

a second conductive line connected to the second touch electrode at a second plurality of locations and overlapping with one or more thin film transistors of one or more of the pixels corresponding to the second touch electrode.

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

the first touch electrode is driven with a common voltage for image display via the first conductive line and driven with a touch driving signal for touch sensing via the first conductive line; and

the second conductive line is driven with the common voltage for image display via the second conductive line and driven with the touch driving signal for touch sensing via the second conductive line.

11. The touch sensitive display apparatus of claim 10, wherein:

the touch sensitive display panel is driven by a time division method including a display period and a touch period;

the first conductive line and the second conductive line are supplied the common voltage for image display during the display period; and

the first conductive line and the second conductive line are supplied the touch driving signal for touch sensing during the touch period.

12. The touch sensitive display apparatus of claim 9, wherein the first touch electrode includes one or more first bridges each connecting portions of the first touch electrode in a first direction.

13. The touch sensitive display apparatus of claim 12, wherein the first touch electrode includes one or more second bridges each connecting other portions of the first touch electrode in a second direction different from the first direction.

14. The touch sensitive display apparatus of claim 13, wherein the first conductive line and the second conductive line also extend in the second direction.

15. The touch sensitive display apparatus of claim 9, wherein the first plurality of locations are at a first distance from the first conductive line, and the second plurality of locations are at a second distance from the second conductive line.

16. The touch sensitive display apparatus of claim 9, wherein the second conductive line overlaps with the first touch electrode.

17. The touch sensitive display apparatus of claim 9, wherein the first conductive line is not overlapped with the second conductive line.