Touch display panel, method for manufacturing the same, and display apparatus

Patent metadata

Field	Value
Publication number	US-2024370126-A1
Application number	US-202218031282-A
Country	US
Kind code	A1
Filing date	May 31, 2022
Priority date	May 31, 2022
Publication date	Nov 7, 2024
Grant date	—

Abstract

The present disclosure provides a touch display panel. The touch display panel includes a display substrate and a touch layer, wherein the touch layer includes a plurality of touch units and a plurality of touch lines which are disposed on the display substrate; wherein the touch lines are connected to at least one touch unit and are configured to electrically connect the touch unit connected thereto to a touch integrated circuit; the plurality of touch lines at least include a first trace and a second trace which are disposed in a non-display region, a length of the first trace being greater than a length of the second trace, and a cross-sectional area of the first trace being larger than a cross-sectional area of the second trace.

First claim

1 . A touch display panel, comprising: a display substrate and a touch layer; wherein
the display substrate comprises a display region and a non-display region surrounding the display region; and the touch layer comprises a plurality of touch units and a plurality of touch lines; wherein
the plurality of touch units are arranged in an array on the display substrate and at least partially disposed in the display region;
the plurality of touch lines [[( 220 )]] are disposed on the display substrate, and the touch line is connected to at least one of the touch units and configured to electrically connect the touch unit connected thereto to a touch integrated circuit; and
the plurality of touch lines at least comprise a first trace and a second trace which are disposed in the non-display region, a length of the first trace being greater than a length of the second trace, a cross-sectional area of the first trace being larger than a cross-sectional area of the second trace.

2 . The touch display panel according to claim 1 , wherein a ratio of the cross-sectional area of the first trace to the cross-sectional area of the second trace is defined as a first ratio, a ratio of the length of the first trace to the length of the second trace is defined as a second ratio, wherein a ratio of the first ratio to the second ratio ranges from 0.95 to 1.05.

3 . The touch display panel according to claim 1 , wherein the display substrate comprises a conductive layer disposed in the non-display region; wherein
at least one first through hole and at least one second through hole are defined in the conductive layer, the first through hole being within an orthographic projection of the first trace on the conductive layer, the second through hole being within an orthographic projection of the second trace on the conductive layer, and a total opening area of the first through hole in per unit area of the first trace being greater than a total opening area of the second through hole in per unit area of the second trace.

4 . The touch display panel according to claim 3 , wherein a ratio of the total opening area of the first through hole in per unit area of the first trace to the total opening area of the second through hole in per unit area of the second trace is equal to a ratio of the cross-sectional area of the first trace to the cross-sectional area of the second trace.

5 . The touch display panel according to claim 3 , wherein a product of a capacitance between the first trace and the conductive layer and a resistance of the first trace is defined as a first load value, a product of a capacitance between the second trace and the conductive layer and a resistance of the second trace is defined as a second load value, wherein a ratio of the first load value to the second load value ranges from 0.95 to 1.05.

6 . The touch display panel according to claim 3 , wherein a plurality of first through holes and a plurality of second through holes which are arranged in an array are defined in the conductive layer, a number of the first through holes being equal to a number of the second through holes, an opening area of each of the first through holes being different from an opening area of each of the second through holes, and a sum of the opening areas of the first through holes being greater than a sum of the opening areas of the second through holes.

7 . The touch display panel according to claim 3 , wherein a plurality of first through holes and a plurality of second through holes which are arranged in an array are defined in the conductive layer, an opening area of each of the first through holes being equal to an opening area of each of the second through holes, a number of the first through holes being different from a number of the second through holes, and a sum of the opening areas of the first through holes being greater than a sum of the opening areas of the second through holes.

8 . The touch display panel according to claim 3 , wherein the first through hole is in a shape of a polygon, a circle, an ellipse, or an irregular closed pattern, and the second through hole is in a shape of a polygon, a circle, an ellipse, or an irregular closed pattern.

9 . The touch display panel according to claim 8 , wherein the shape of the first through hole is the same as or different from the shape of the second through hole.

10 . The touch display panel according to claim 3 , wherein the display substrate further comprises a plurality of light-emitting units disposed in the display region, the light-emitting unit comprising an anode layer, a light-emitting layer, and a cathode layer which are sequentially stacked, and the anode layer or the cathode layer being in a same layer as the conductive layer.

11 . The touch display panel according to claim 10 , wherein the anode layer is in the same layer as the conductive layer, and an orthographic projection of the cathode layer on the anode layer is outside an orthographic projection of the second trace on the anode layer.

12 . The touch display panel according to claim 11 , wherein the display substrate further comprises a power signal line disposed in the non-display region, the conductive layer being connected to the power signal line and the cathode layer.

13 . The touch display panel according to claim 1 , wherein the touch layer further comprises a plurality of first connection lines parallel to each other and a plurality of second connection lines parallel to each other, the first connection lines and the second connection lines being disposed in the display region; and
the plurality of touch units are divided into a plurality of first touch unit groups and a plurality of second touch unit groups, wherein the first touch unit group comprises a plurality of touch units arranged in a same row, the plurality of touch units in the first touch unit group are connected via at least one of the first connection lines and connected to at least one of the touch lines, and the touch lines connected to the plurality of touch units in different first touch unit groups are different; and the second touch unit group comprises a plurality of touch units arranged in a same column, the plurality of touch units in the second touch unit group are connected via at least one of the second connection lines and connected to one of the touch lines, and the touch lines connected to the plurality of touch units in different second touch unit groups are different.

14 . The touch display panel according to claim 13 , wherein the touch unit is a transparent conductive layer or is of a metal mesh structure.

15 . The touch display panel according to claim 13 , further comprising: two touch integrated circuits, wherein the first touch unit group is connected to the two touch integrated circuits via two of the touch lines disposed outside the display region, and the second touch unit group is connected to at least one of the touch integrated circuits via at least one of the touch lines disposed outside the display region.

16 . The touch display panel according to claim 13 , further comprising: the touch integrated circuit, wherein the first touch unit group and the second touch unit group are connected to the touch integrated circuit via one of the touch lines disposed outside the display region.

17 . The touch display panel according to claim 1 , wherein the display substrate comprises an array substrate and a plurality of light-emitting units; wherein
the plurality of light-emitting units are arranged in an array on the array substrate; the array substrate comprises a base sub

Assignees

• Boe Technology Group Co Ltd

Inventors

• Liu Hao
• Zhu Jianchao
• Wen Mengyang
• Ni Zibo
• Shang Guangliang
• Liu Libin

Classifications

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06F3/04164

  Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads · 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

• G06F3/045

  using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact · CPC title

• G06F2203/04103

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