Color filter array having touch sensor and display panel having the same

Patent metadata

Field	Value
Publication number	US-10175841-B2
Application number	US-201715606919-A
Country	US
Kind code	B2
Filing date	May 26, 2017
Priority date	May 30, 2016
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

Disclosed are a color filter array having a touch sensor and a display panel having the same. The color filter array may comprise: a plurality of color filters arranged in first and second directions on a substrate; a touch block electrode disposed on the color filters to sense a user touch position; a black matrix disposed on the touch block electrode between the color filters; and a touch-sensing line which is disposed in any one of the first and second directions and at least one of which is connected to the touch block electrode. Thereby, when the color filter array is applied to a bending-type or folding-type display device, generation of cracks in the touch sensing line is reduced or minimized.

First claim

What is claimed is:

1. A color filter array having a touch sensor, the color filter array comprising:
a plurality of color filters arranged in first and second directions on a substrate;
a touch block electrode disposed on the plurality of color filters to sense a user touch position;
a black matrix disposed on the touch block electrode between at least two of the plurality of color filters; and
a plurality of touch-sensing lines each extended in the first direction or the second direction to cut across the touch block electrode overlapping with the plurality of color filters, a touch-sensing line of the plurality of touch-sensing lines being connected to the touch block electrode.

2. The color filter array according to claim 1 , wherein the touch-sensing line is connected to the touch block electrode with the black matrix interposed in between in a connection area of the touch-sensing line and the touch block electrode.

3. The color filter array according to claim 2 , wherein, in the connection area of the touch-sensing line and the touch block electrode, the touch-sensing line has a line width that is equal to or less than that of the black matrix, the touch block electrode being exposed through a touch contact hole formed in the black matrix.

4. The color filter array according to claim 2 , wherein, in the connection area of the touch-sensing line and the touch block electrode, the touch-sensing line has a line width that is greater than that of the black matrix, the touch block electrode being exposed by the black matrix.

5. The color filter array according to claim 2 , wherein, in the connection area of the touch-sensing line and the touch block electrode, the touch-sensing line is disposed on the touch block electrode so as to be directly connected to the touch block electrode.

6. The color filter array according to claim 5 , wherein the touch-sensing line is formed of an opaque material.

7. The color filter array according to claim 5 , wherein the touch-sensing line has a line width that is equal to or less than that of the black matrix in a disconnection area of the touch-sensing line and the touch block electrode.

8. The color filter array according to claim 1 , further comprising a plurality of touch pads arranged in the first direction, a touch pad of the plurality of touch pads being connected to the touch-sensing line,
wherein the touch pad is formed of a same material as the touch-sensing line and extends from the touch-sensing line.

9. The color filter array according to claim 8 , wherein the touch-sensing line extends in a straight line from the touch pad in the second direction.

10. The color filter array according to claim 1 , further comprising a plurality of touch pads arranged in the first direction, a touch pad of the plurality of touch pads being connected to the touch-sensing line,
wherein the touch pad is formed of a same material as the touch block electrode, and
wherein the touch-sensing line is connected to a portion of an upper surface and a side surface of the touch pad.

11. The color filter array according to claim 10 , wherein the touch-sensing line extends in a straight line from the touch pad in the second direction.

12. The color filter array according to claim 1 , wherein in a disconnection area of the touch-sensing line and the touch block electrode, the touch-sensing line is electrically insulated from the touch block electrode with the black matrix interposed in between.

13. A display panel comprising:
a thin-film transistor array; and
a color filter array bonded to the thin-film transistor array, the color filter array having a touch sensor,
wherein the color filter array further includes:
a plurality of color filters arranged in first and second directions on a substrate;
a touch block electrode disposed on the plurality of color filters to sense a user touch position;
a black matrix disposed on the touch block electrode between at least two of the plurality of color filters; and
a plurality of touch-sensing lines each extended in the first direction or the second direction to cut across the touch block electrode overlapping with the plurality of color filters, a touch-sensing line of the plurality of touch-sensing lines being connected to the touch block electrode.

14. The display panel according to claim 13 , wherein the thin-film transistor array includes:
a thin-film transistor;
a light-emitting element connected to the thin-film transistor; and
a signal line configured to overlap the touch sensing line.

15. The display panel according to claim 13 , wherein the touch-sensing line is connected to the touch block electrode with the black matrix interposed in between in a connection area of the touch-sensing line and the touch block electrode.

16. The display panel according to claim 15 , wherein, in the connection area of the touch-sensing line and the touch block electrode, the touch-sensing line has a line width that is equal to or less than that of the black matrix, the touch block electrode being exposed through a touch contact hole formed in the black matrix.

17. The display panel according to claim 15 , wherein, in the connection area of the touch-sensing line and the touch block electrode, the touch-sensing line has a line width that is greater than that of the black matrix, the touch block electrode being exposed by the black matrix.

18. The display panel according to claim 15 , wherein, in the connection area of the touch-sensing line and the touch block electrode, the touch-sensing line is disposed on the touch block electrode so as to be directly connected to the touch block electrode.

19. The display panel according to claim 18 , wherein the touch-sensing line is formed of an opaque material.

20. The display panel according to claim 18 , wherein the touch-sensing line has a line width that is equal to or less than that of the black matrix in a disconnection area of the touch-sensing line and the touch block electrode.

21. The display panel according to claim 13 , further comprising a plurality of touch pads arranged in the first direction, a touch pad of the plurality of touch pads being connected to the touch-sensing line.

22. The display panel according to claim 21 , wherein the touch pad is formed of a same material as the touch-sensing line and extends from the touch-sensing line.

23. The display panel according to claim 21 , wherein the touch pad is formed of a same material as the touch block electrode, and
wherein the touch-sensing line is connected to a portion of an upper surface and a side surface of the touch pad.

24. The display panel according to claim 23 , wherein the touch-sensing line extends in a straight line from the touch pad in the second direction.

25. The display panel according to claim 13 , wherein in a disconnection area of the touch-sensing line and the touch block electrode, the touch-sensing line is electrically insulated from the touch block electrode with the black matrix interposed in between.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Min-Joo
• Kim Tae-Hwan

Classifications

• G06F3/033

  Pointing devices displaced or positioned by the user {, e.g. mice, trackballs, pens or joysticks}; Accessories therefor (digitisers characterised by the transducing means G06F3/041) · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G09G2320/0276

  for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction · CPC title

• G09G3/2011

  by amplitude modulation · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title