Display substrate having a plurality of core-coil assemblies configured to detect a touch and display panel having the same

Patent metadata

Field	Value
Publication number	US-11093099-B2
Application number	US-201716065039-A
Country	US
Kind code	B2
Filing date	Jun 30, 2017
Priority date	Jun 30, 2017
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

The present application discloses a first display substrate including a plurality of core-coil assemblies configured to detect a touch. Each of the plurality of core-coil assemblies includes a first base substrate; a core layer on the first base substrate and including a plurality of magnetic permeable cores substantially along a first direction and spaced apart from each other, each of the plurality of magnetic permeable cores substantially along a second direction; and a conductive coil wound around the plurality of magnetic permeable cores for multiple turns and insulated from the core layer.

First claim

What is claimed is:

1. A first display substrate, comprising a plurality of core-coil assemblies configured to detect a touch, a respective one of the plurality of core-coil assemblies comprising:
a first base substrate;
a gate line layer comprising a plurality of gate lines;
a core layer on the first base substrate and comprising a plurality of magnetic permeable cores substantially along a first direction and spaced apart from each other, a respective one of the plurality of magnetic permeable cores substantially along a second direction; and
a conductive coil wound around the plurality of magnetic permeable cores for multiple turns and insulated from the core layer;
wherein the conductive coil comprises:
a first conductive line layer on a side of the core layer proximal to the first base substrate and comprising a plurality of first conductive lines spaced apart from each other and crossing over the plurality of magnetic permeable cores; and
a second conductive line layer on a side of the core layer distal to the first base substrate and comprising a plurality of second conductive lines spaced apart from each other and crossing over the plurality of magnetic permeable cores;
wherein the gate line layer and the first conductive line layer are in a same layer and comprises a same material.

2. The first display substrate of claim 1 , wherein
projections of two adjacent first conductive lines of the plurality of first conductive lines on the first base substrate sandwiches a projection of one of the plurality of second conductive lines on the first base substrate; and
projections of two adjacent second conductive lines of the plurality of second conductive lines on the first base substrate sandwiches a projection of one of the plurality of first conductive lines on the first base substrate.

3. The first display substrate of claim 1 , wherein the conductive coil further comprises:
a third conductive line layer on side of the first conductive line layer proximal to the second conductive line layer and comprising a plurality of third conductive lines;
wherein a respective one of the plurality of third conductive lines electrically connects one of the plurality of first conductive lines and one of the plurality of second conductive lines.

4. The first display substrate of claim 3 , further comprising a first insulating layer between the first conductive line layer and the third conductive line layer; and
a second insulating layer between the second conductive line layer and the third conductive line layer;
wherein the respective one of the plurality of third conductive lines is electrically connected to one of the plurality of first conductive lines through a first via extending through the first insulating layer; and
the respective one of the plurality of third conductive lines is electrically connected to one of the plurality of second conductive lines through a second via extending through the second insulating layer.

5. The first display substrate of claim 3 , wherein the respective one of the plurality of third conductive lines electrically connects adjacent terminals of one of the plurality of first conductive lines and one of the plurality of second conductive lines.

6. The first display substrate of claim 3 , wherein the third conductive line layer further comprises an input signal line configured to transmit a touch input signal to the conductive coil; and
an output signal line configured to sense a touch signal generated in a corresponding core-coil assembly of the plurality of core-coil assemblies.

7. The first display substrate of claim 3 , wherein projections of the plurality of magnetic permeable cores on the first base substrate substantially cover projections of the plurality of third conductive lines on the first base substrate; and
the plurality of third conductive lines are insulated from the plurality of magnetic permeable cores.

8. A first display substrate, comprising:
a plurality of core-coil assemblies configured to detect a touch; and
a source-drain signal line layer comprising a plurality of source-drain signal lines;
wherein a respective one of the plurality of core-coil assemblies comprises:
a first base substrate;
a core layer on the first base substrate and comprising a plurality of magnetic permeable cores substantially along a first direction and spaced apart from each other, a respective one of the plurality of magnetic permeable cores substantially along a second direction; and
a conductive coil wound around the plurality of magnetic permeable cores for multiple turns and insulated from the core layer;
wherein the conductive coil comprises:
a first conductive line layer on a side of the core layer proximal to the first base substrate and comprising a plurality of first conductive lines spaced apart from each other and crossing over the plurality of magnetic permeable cores;
a second conductive line layer on a side of the core layer distal to the first base substrate and comprising a plurality of second conductive lines spaced apart from each other and crossing over the plurality of magnetic permeable cores; and
a third conductive line layer on side of the first conductive line layer proximal to the second conductive line layer and comprising a plurality of third conductive lines;
wherein a respective one of the plurality of third conductive lines electrically connects one of the plurality of first conductive lines and one of the plurality of second conductive lines;
wherein the source-drain signal line layer and the third conductive line layer are in a same layer and comprises a same material.

9. The first display substrate of claim 8 , further comprising a core insulating layer between the core layer and the third conductive line layer and between the core layer and the source-drain signal line layer; and
an interlayer dielectric layer between the first conductive line layer and the third conductive line layer and between the first conductive line layer and the source-drain signal line layer.

10. The first display substrate of claim 3 , wherein the plurality of magnetic permeable cores, the plurality of first conductive lines, the plurality of second conductive lines, and the plurality of third conductive lines are substantially in an inter-subpixel region of the first display substrate.

11. The first display substrate of claim 1 , wherein a respective one of the plurality of magnetic permeable cores comprises a middle portion and two terminal portions respectively at two ends of the middle portion; and
the middle portion has a thickness less than those of the two terminal portions.

12. A display panel, comprising a first display substrate; and
a second display substrate facing the first display substrate and spaced apart from the first display substrate;
wherein the first display substrate comprises a plurality of core-coil assemblies configured to detect a touch,
wherein a respective one of the plurality of core-coil assemblies comprises:
a first base substrate;
a core layer on the first base substrate and comprising a plurality of magnetic permeable cores substantially along a first direction and spaced apart from each other, a respective one of the plurality of magnetic permeable cores substantially along a second direction; and
a conductive coil wound around the plurality of magnetic permeable cores for multiple turns and insulated from the core layer;
wherein the second display substrate comprises a target layer comprising a plurality of magnetic permeable targets substantially along the first direction and spaced apart from each other, a respective one of the plurality of magnetic permeable

Assignees

• Boe Technology Group Co Ltd
• Ordos Yuansheng Optoelectronics Co Ltd

Inventors

• Ding Duolong
• Liu Huafeng
• Zhao Shengwei
• Sun Chaochao
• Wang Chao
• Lv Jingping
• Yang Meng
• Yang Lei
• Hu Chongliang
• Shun Bule
• Xie Lin

Classifications

• G06F3/046 Primary

  by electromagnetic means · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F2203/04101

  2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup · CPC title