Touch display apparatus

• US 10,108,283 B2
• Filed: 12/01/2016
• Issued: 10/23/2018
• 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:
  US15/366,856
• Publication Number:
  US 20170083139A1
• Time in Patent Office: 691 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 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 slits in 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;

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

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

2. The touch sensitive display apparatus of claim 1, the display panel further comprising:

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.

3. 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.

4. The touch sensitive display apparatus of claim 1, wherein the first touch electrode is comprised of a first material, and the second conductive line is comprised of a second material having lower resistance than the first material.

5. The touch sensitive display apparatus of claim 4, 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.

6. The touch sensitive display apparatus of claim 1, wherein the display panel further comprises:

a pixel having a thin film transistor, wherein the second conductive line overlaps with the thin film transistor.

7. The touch sensitive display apparatus of claim 1,

wherein the first touch electrode comprises a plurality of touch electrode lines that are parallel to each other,

wherein the first conductive line is connected to the touch electrode lines at the plurality of first locations, and

wherein the second conductive line is connected to the touch electrode lines at the plurality of second locations.

8. The touch sensitive display apparatus of claim 1, wherein the display panel further comprises:

a fourth conductive line connected to the second touch electrode at a fourth plurality of locations.

9. The touch sensitive display apparatus of claim 1, further comprising:

a driver circuit to drive the display panel in a display period and a touch period, the driver circuit supplying a common voltage for image display to the first touch electrode via the first conductive line during the display period, and supplying a touch driving signal to the first touch electrode via the first conductive line during the touch period.

10. The touch sensitive display apparatus of claim 1, wherein the second conductive line is connected to the first touch electrode via a plurality of contacts at the second plurality of locations.

11. The touch sensitive display apparatus of claim 10, wherein the plurality of contacts are in contact holes in an insulation layer between the second conductive line and the first touch electrode.

12. The touch sensitive display apparatus of claim 7, wherein the plurality of touch electrode lines are perpendicular to the first conductive line and the second conductive line.

13. The touch sensitive display apparatus of claim 1, wherein the first conductive line is parallel to the second conductive line.

14. The touch sensitive display apparatus of claim 1, wherein the first conductive line is a touch signal line and the second conductive line is a connecting line.

15. The touch sensitive display apparatus of claim 1, wherein the second conductive line is in a different layer than the first touch electrode.

16. The touch sensitive display apparatus of claim 1, wherein the first conductive line is overlapped with the slits in the second touch electrode, and the third conductive line is overlapped with the slits in the first touch electrode.

17. 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;

a first conductive line connected to the first touch electrode at a first plurality of locations and not connected to the second touch electrode;

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;

a third conductive line connected to the second touch electrode at a third plurality of locations and not connected to the first touch electrode; and

a fourth conductive line different from the third conductive line, the fourth conductive line connected to the second touch electrode at a fourth plurality of locations; and

wherein the first touch electrode comprises first slits and second slits, and the second touch electrode comprises third slits and fourth slits, and

wherein the first conductive line overlaps with the first slits, the second conductive line overlaps with the second slits, the third conductive line overlaps with the third slits and the fourth conductive line overlaps with the fourth slits.

18. The touch sensitive display apparatus of claim 17, wherein the first conductive line is oriented in a same direction as the second conductive line.

19. The touch sensitive display apparatus of claim 17, wherein the second touch electrode further comprises fifth slits, and the first conductive line overlaps with the fifth slits.