Touch display apparatus

• US 9,766,764 B2
• Filed: 12/30/2015
• Issued: 09/19/2017
• 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:
  US14/983,546
• Publication Number:
  US 20160224155A1
• Time in Patent Office: 629 Days
• Field of Search: 345173, 345174
• 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 comprised of a first material;

a first conductive line connected to the first touch electrode at a first plurality of locations, 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;

a second conductive line different from the first conductive line, the second conductive line connected to the first touch electrode at a second plurality of locations and the second conductive line is comprised of a second material having lower resistance than the first material, and

a data line to carry a data voltage to at least one pixel, wherein the data line is in a different layer than the second conductive line, is oriented in a same direction as the second conductive line and overlaps with the second conductive line.

2. The touch sensitive display apparatus of claim 1, wherein the first conductive line and the second conductive line are of a same material and located in a same layer.

3. The touch sensitive display apparatus of claim 1, wherein first touch electrode is comprised of indium tin oxide (ITO), and the second conductive line is comprised of metal having resistivity which is lower than that of ITO.

4. 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 the first touch electrode comprises a slit;

a first conductive line connected to the first touch electrode at a first plurality of locations, 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 different from the first conductive line, the second conductive line connected to the first touch electrode at a second plurality of locations, the second conductive line overlapping with the slit.

6. A touch sensitive display apparatus of claim 4, wherein each of the plurality of touch electrodes is connected to the first conductive line through a plurality of contacts.

7. The touch sensitive display apparatus of claim 6, wherein the first conductive line overlaps with the slit.

8. The touch sensitive display apparatus of claim 4, wherein the slit is disposed in a non-display area.

9. The touch sensitive display apparatus of claim 4, wherein the slit is disposed in an area where a thin film transistor (TFT) is disposed.

10. The touch display apparatus of claim 4, wherein each of the plurality of touch electrodes comprises a plurality of unit touch electrodes, a plurality of first bridges, and a plurality of second bridges, and

each of the plurality of first bridges and the plurality of second bridges electrically connects unit touch electrodes adjacent to each other.

11. The touch sensitive display apparatus of claim 10, wherein each of the plurality of first bridges electrically connects two unit touch electrodes which are adjacent to each other along a corresponding gate line, and

each of the second bridges electrically connects two unit touch electrodes which are adjacent to each other along a corresponding data line.

12. The touch sensitive display apparatus of claim 11, wherein the plurality of first bridges are disposed to overlap with a plurality of gate lines or to be parallel to the gate lines, and

the plurality of second bridges are disposed to overlap with a plurality of data lines or to be parallel to the data lines.

13. The touch sensitive display apparatus of claim 11, wherein the plurality of unit touch electrodes are spaced from each other by the plurality of second bridges.

14. The touch sensitive display apparatus of claim 13, wherein the first conductive line overlap with the slit, and

the first conductive line is disposed along an area which is provided between the plurality of unit touch electrodes by the plurality of second bridges.

5. A touch sensitive display apparatus comprising:

a touch sensitive display panel comprising;

a pixel having a thin film transistor;

a plurality of touch electrodes comprising at least a first touch electrode;

a first conductive line connected to the first touch electrode at a first plurality of locations, 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 different from the first conductive line, the second conductive line connected to the first touch electrode at a second plurality of locations, the second conductive line overlapping with the thin film transistor.

15. A touch sensitive display apparatus of claim 5, wherein each of the plurality of touch electrodes is connected to the first conductive line through a plurality of contacts.

16. The touch display apparatus of claim 5, wherein each of the plurality of touch electrodes comprises a plurality of unit touch electrodes, a plurality of first bridges, and a plurality of second bridges, and

each of the plurality of first bridges and the plurality of second bridges electrically connects unit touch electrodes adjacent to each other.

17. The touch sensitive display apparatus of claim 16, wherein each of the plurality of first bridges electrically connects two unit touch electrodes which are adjacent to each other along a corresponding gate line, and

each of the second bridges electrically connects two unit touch electrodes which are adjacent to each other along a corresponding data line.

18. The touch sensitive display apparatus of claim 17, wherein the plurality of first bridges are disposed to overlap with a plurality of gate lines or to be parallel to the gate lines, and

the plurality of second bridges are disposed to overlap with a plurality of data lines or to be parallel to the data lines.

19. The touch sensitive display apparatus of claim 17, wherein the plurality of unit touch electrodes are spaced from each other by the plurality of second bridges.