Display Device

• US 20190042038A1
• Filed: 08/01/2018
• Published: 02/07/2019
• Est. Priority Date: 08/04/2017
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: LEE, JunYeob
• Granted Patent: US 10,592,031 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 1/1626 with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]
• CPC Class Codes: G06F 1/1643 the display being associated to a digitizer, e.g. laptops that can be used as penpads details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615
• CPC Class Codes: G06F 1/1652 the display being flexible, e.g. mimicking a sheet of paper, or rollable
• 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 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• 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
• 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: G06F 3/047 using sets of wires, e.g. crossed wires

Abstract

A display device is disclosed, which has excellent touch sensitivity due to a corner area of a screen, wherein the corner area is formed to be curved. The display device comprises a substrate including a touch area having a corner touch area; a plurality of gate lines arranged on the substrate in a first direction; a plurality of data lines arranged in a second direction crossing the first direction; a plurality of pixel areas defined by crossing the plurality of gate lines and the plurality of data lines; a plurality of common electrodes arranged to overlap at least one pixel area; and a plurality of touch link lines electrically connected with the plurality of common electrodes and extended in a direction parallel with the first direction or the second direction, wherein, among the plurality of common electrodes, the first common electrodes arranged on the corner touch area have shape different from that of the second common electrodes arranged on the other touch area except the corner touch area.

Claims

1. A display device comprising:

a substrate including a touch area having a corner touch area;

a plurality of gate lines arranged on the substrate in a first direction;

a plurality of data lines arranged in a second direction crossing the first direction;

a plurality of pixel areas at crossings of the plurality of gate lines and the plurality of data lines;

a plurality of common electrodes arranged to overlap at least one pixel area; and

a plurality of touch link lines, each of the touch link lines electrically connected with a corresponding one of the plurality of common electrodes and extended in a direction parallel with the first direction or the second direction,

wherein, among the plurality of common electrodes, first common electrodes arranged in the corner touch area have a first shape different from a second shape of second common electrodes arranged in other touch area excluding the corner touch area.

2. The display device of claim 1, wherein each of the plurality of common electrodes is connected with a corresponding one of the plurality of touch link lines through a same number of contact holes.

3. The display device of claim 1, wherein each of the plurality of common electrodes and a corresponding one of the plurality of touch link lines contact each other with a same contact area.

9. The display device of claim 1, wherein the first common electrode at the corner touch area includes a chamfer portion or a rounding portion.

10. The display device of claim 9, wherein the first touch link lines passing through the first common electrodes at the corner touch area are spaced apart from the chamfer portion or the rounding portion.

11. The display device of claim 10, wherein the touch area includes a corner portion rounded in a curved shape having a first curvature radius, and the chamfer portion or the rounding portion of one of the first common electrodes is provided adjacent to the corner portion of the touch area.

12. The display device of claim 11, wherein the first common electrode includes a rounding portion adjacent to the corner portion of the touch area, and the rounding portion of the first common electrode has a concentric circle shape together with the corner portion of the touch area.

4. A display device comprising:

a substrate including a touch area having a corner touch area;

a plurality of gate lines arranged on the substrate in a first direction;

a plurality of data lines arranged in a second direction crossing the first direction;

a plurality of pixel areas at crossings of the plurality of gate lines and the plurality of data lines;

a plurality of common electrodes arranged to overlap at least one pixel area; and

a plurality of touch link lines each of which is electrically connected with a corresponding one of the plurality of common electrodes and extended in a direction parallel with the first direction or the second direction,

wherein, among the plurality of touch link lines, a first interval between first touch link lines passing through first common electrodes arranged in an edge of the touch area including the corner touch area is different from a second interval between second touch link lines passing through second common electrodes arranged in other touch area except the edge of the touch area through which the first touch link lines pass.

5. The display device of claim 4, wherein the first interval is narrower than the second interval.

6. The display device of claim 5, wherein the first common electrode has a shape different from that of the second common electrode.

7. The display device of claim 5, wherein the first common electrode has a size different from that of the second common electrode.

8. The display device of claim 4, wherein each of the plurality of common electrodes is connected with a corresponding one of the plurality of touch link lines through the same number of contact holes.

13. The display device of claim 4, wherein the plurality of common electrodes are used as touch electrodes for touch sensing.

14. The display device of claim 4, further comprising:

first dummy lines each of which is electrically connected with a corresponding one of the first common electrodes, the first dummy lines not present between the first touch link lines;

second dummy lines each of which is electrically connected with the second common electrodes, at least one of the second dummy lines present between the second touch link lines.

15. A display device comprising:

a plurality of common electrodes, the common electrodes comprising first common electrodes arranged in an edge of a touch area of the display device in a first direction including a corner touch area, and second common electrodes arranged in other touch area except the edge of the touch area; and

a plurality of touch link lines including first touch link lines and second touch link lines, each of the first touch link lines electrically connected with a corresponding one of the first common electrodes and spaced apart from each other at a first interval, and each of the second touch link lines electrically connected with a corresponding one of the second common electrodes and spaced apart from each other at a second interval wider than the first interval.

16. The display device of claim 15, wherein the first common electrodes at the corner touch area each includes a chamfer portion or a rounding portion.

17. The display device of claim 16, wherein the first touch link lines are spaced apart from the chamfer portion or the rounding portion of the corner touch area of the first common electrodes.

18. The display device of claim 15, wherein the first common electrode has a shape different from that of the second common electrode.

19. The display device of claim 15, wherein the first common electrode has a size different from that of the second common electrode.

20. The display device of claim 15, further comprising:

first dummy lines each of which is electrically connected with a corresponding one of the first common electrodes, the first dummy lines not present between the first touch link lines;

second dummy lines each of which is electrically connected with the second common electrodes, at least one of the second dummy lines present between the second touch link lines.