Touch display panel and touch display device

Patent metadata

Field	Value
Publication number	US-10503301-B2
Application number	US-201815957623-A
Country	US
Kind code	B2
Filing date	Apr 19, 2018
Priority date	Jan 2, 2018
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

A touch display panel includes first touch electrodes arranged in a first direction and extending along a second direction, second touch electrodes arranged in the second direction and extending along the first direction, and sub-pixels; each first touch electrode comprises first electrode blocks arranged in the second direction, every two adjacent first electrode blocks are connected to each other, each second touch electrode comprises second electrode blocks made of metal, every two adjacent second electrode blocks are connected to each other by a bridge structure which is transparent and in the same layer as the second electrode blocks, an orthographic projection of the second electrode block on a plane of the touch display panel is enclosed within an orthographic projection of the non-aperture portion of the sub-pixel on the plane. A touch display device includes the touch display panel.

First claim

What is claimed is:

1. A touch display panel, comprising:
a plurality of first touch electrodes, wherein the plurality of first touch electrodes is arranged in a first direction and extends along a second direction, wherein each of the plurality of first touch electrodes comprises a plurality of first electrode blocks arranged in the second direction, and every two adjacent first electrode blocks along the second direction of the plurality of first electrode blocks are connected to each other;
a plurality of second touch electrodes, wherein the plurality of second touch electrodes is arranged in the second direction and extends along the first direction, wherein each of the plurality of second touch electrodes comprises a plurality of second electrode blocks arranged in the first direction, and every two adjacent second electrode blocks along the first direction of the plurality of second electrode blocks are connected to each other via a bridge structure, wherein the bridge structure and the plurality of second electrode blocks are arranged in different layers, wherein the plurality of second electrode blocks is made of metal, and wherein the bridge structure is transparent; and
a plurality of sub-pixels, wherein each sub-pixel of the plurality of sub-pixels comprises an aperture and a non-aperture portion;
wherein two adjacent first electrode blocks of the plurality of first electrode blocks in the second direction are connected to each other by a connection portion, wherein an insulation layer is arranged between the connection portion and the bridge structure, and wherein the insulation layer is in direct contact with both the bridge structure and the plurality of second electrode blocks; and
wherein each second electrode block of the plurality of second touch electrodes has a grid structure, and an orthographic projection of the plurality of second electrode blocks on a plane of the touch display panel is enclosed within an orthographic projection of the non-aperture portion of the sub-pixel on the plane.

2. The touch display panel according to claim 1 , further comprising a pixel defining layer, wherein the orthographic projection of the plurality of second electrode blocks on the plane of the touch display panel enclosed inside an orthographic projection of the pixel defining layer on the plane.

3. The touch display panel according to claim 2 , wherein a grid in the plurality of second electrode blocks has a boarder having a width of L1, and the pixel defining layer overlapping to the borders has a width of L2, wherein L1>3.7 μm and 14 μm≤L2−L1≤25 μm.

4. The touch display panel according to claim 1 , wherein the plurality of second touch electrodes each further comprises a grid hole, wherein each grid hole overlays an aperture of at least one sub-pixel of the plurality of sub-pixels.

5. The touch display panel according to claim 4 ,
wherein apertures of at least two sub-pixels of the plurality of sub-pixels have different shapes, and said grid hole has a same shape as the overlaid aperture of the sub-pixel; and
wherein said grid hole has an area of S1, the overlaid aperture of the sub-pixel has an area of S2, and 4≤S1/S2≤5.5.

6. The touch display panel according to claim 4 ,
wherein apertures of at least two sub-pixels of the plurality of sub-pixels have different shapes, and the grid holes in the second electrode blocks have the same shape; and
wherein each of the grid hole has an area of S3, the largest aperture of the plurality of sub-pixels has an area of S4, and 3≤S3/S4≤4.5.

7. The touch display panel according to claim 4 , wherein each grid hole overlays apertures of three sub-pixels of the plurality of sub-pixels; and
wherein said grid hole has an area of S5, an aperture of one of the three sub-pixels has an area of S6, and 10.5≤S5/S6≤13.

8. The touch display panel according to claim 1 , wherein in the first direction, two closest grids in two adjacent second electrode blocks of the plurality of second electrode blocks are connected to each other by one of the bridge structures.

9. The touch display panel according to claim 8 , wherein the bridge structure has a length in the second direction equal to that of the grid connected to the bridge structure in the second direction.

10. The touch display panel according to claim 1 , an orthographic projection of a middle portion of the bridge structure on the plane of the touch display panel overlaps an orthographic projection of the connection portion on the plane; and
wherein the middle portion of the bridge structure in the second direction has a length smaller than that of any other portion of the bridge structure in the second direction.

11. The touch display panel according to claim 1 ,
wherein an orthographic projection of the insulation layer on the plane of the touch display panel covers an entire touch region of the touch display panel; and
a plurality of via holes is disposed in the insulation layer, wherein the bridge structure is connected to the corresponding ones of the plurality of second electrode blocks by the via holes.

12. The touch display panel according to claim 1 ,
wherein an orthographic projection of the bridge structure on the plane of the touch display panel overlaps an orthographic projection of the connection portion on the plane to form an overlapping region;
wherein an orthographic projection of the insulation layer on the plane of the touch display panel covers the overlapping region; and
wherein the bridge structure comprises, in the first direction, a contact portion which extends beyond a boundary of the insulation layer and is in direct contact with said second electrode blocks.

13. The touch display panel according to claim 1 , wherein a length of one of the plurality of second electrode blocks in the second direction is longest in the middle and decreases to both sides along the first direction.

14. The touch display panel according to claim 1 , wherein each first electrode block of the plurality of first electrode blocks is a metal electrode, and wherein the plurality of first electrode blocks and the plurality of second electrode blocks are arranged in the same layer;
wherein each first electrode block of the plurality of first electrode blocks is in a grid structure and an orthographic projection of the plurality of first electrode blocks on the plane of the touch display panel enclosed inside an orthographic projection of the non-aperture portion of the sub-pixel on the plane.

15. The touch display panel according to claim 14 , wherein each grid hole of each first electrode block of the plurality of first electrode blocks corresponds to an aperture of at least one sub-pixel of the plurality of sub-pixels.

16. The touch display panel according to claim 14 , wherein the connection portion is made of metal, and the connection portion and the plurality of first electrode blocks are arranged in the same layer; and
wherein the connection portion has a grid structure and wherein the grid structure has at least one grid hole, overlaying an aperture of at least one sub-pixel of the plurality of sub-pixels.

17. The touch display panel according to claim 1 , wherein a dummy electrode is arranged between one first electrode block of the plurality of first electrode blocks and one second electrode block of the plurality of second electrode blocks, which are adjacent to each other.

18. The touch display panel described in claim 1 , wherein the plurality of first touch electrodes comprises touch sensing electrodes and the plurality of second touch electro

Assignees

• Shanghai Tianma Am Oled Co Ltd

Inventors

• Wang Qingxia
• Huang Kaihong
• Chen Min
• Huang Gaojun
• Zhu Juan

Classifications

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F2203/04111

  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 title

• G06F3/0446 Primary

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · CPC title