Electromagnetic-type touch display apparatus

Patent metadata

Field	Value
Publication number	US-9753601-B2
Application number	US-201715453792-A
Country	US
Kind code	B2
Filing date	Mar 8, 2017
Priority date	Mar 31, 2014
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

An electromagnetic-type touch display apparatus is disclosed. The apparatus comprises: a first substrate; a second substrate; a first conductive layer formed on the first substrate comprising first electromagnetic induction coils forming loops extending in a first direction; and a second conductive layer formed between the first and second substrates comprising second electromagnetic induction coils forming loops extending in a second direction perpendicular to the first direction. Each of the substrates comprises a display region and a non-display region, and the first and second electromagnetic induction coils are used to determine a touch position, wherein, at least one of the first conductive layer and the second conductive layer is also configured as at least one film layer of the first substrate or the second substrate, which forms a pattern required by the first or second electromagnetic induction coils and transmits a sensing signal.

First claim

What is claimed is:

1. An electromagnetic-type touch display apparatus, comprising:
a first substrate;
a second substrate, arranged opposite to the first substrate, wherein a plurality of pixel units in rows and columns are formed on the second substrate;
a first conductive layer, wherein the first conductive layer comprises a plurality of first strip-shaped sensing electrodes arranged in parallel for forming a plurality of first electromagnetic induction coils, each of the plurality of first electromagnetic induction coils is formed with at least two of the plurality of first strip-shaped sensing electrodes and connection lines, each of the plurality of first strip-shaped sensing electrodes has two long sides extending in a first direction, and two short sides; and
a second conductive layer, wherein the second conductive layer comprises a plurality of second strip-shaped sensing electrodes arranged in parallel for forming a plurality of second electromagnetic induction coils, each of the plurality of second electromagnetic induction coils is formed with at least two of the plurality of second strip-shaped sensing electrodes and connection lines, and each of the plurality of second strip-shaped sensing electrodes has two long sides extending in a second direction perpendicular to the first direction and two short sides,
wherein, either one of the first substrate and the second substrate comprises a display region and a non-display region having a plurality of connecting wires,
wherein the first electromagnetic induction coils and the second electromagnetic induction coils are configured to determine a touch position,
wherein, the second conductive layer is configured as a black matrix layer on a first side of the first substrate facing the second substrate or a common electrode layer including a plurality of common electrodes disposed on the second substrate, and
wherein the second substrate comprises a thin film transistor element layer having a plurality of pixel electrodes and the plurality of common electrodes for forming the common electrode layer, wherein a horizontal electrical field is generated between an adjacent pair of one of the plurality of pixel electrodes and one of the plurality of common electrodes.

2. The electromagnetic-type touch display apparatus according to claim 1 , wherein the black matrix layer comprises a conductive light-shading material comprising at least one of titanium sub-oxide and chromium.

3. The electromagnetic-type touch display apparatus according to claim 1 , wherein in a case that the second conductive layer is configured as the black matrix layer on the first side of the first substrate facing the second substrate, the first conductive layer is configured as a transparent shielding electrode layer on a second side of the first substrate not facing the second substrate or the common electrode layer on the second substrate.

4. The electromagnetic-type touch display apparatus according to claim 1 , wherein the first electromagnetic induction coils each or the plurality of second electromagnetic induction coils each comprises three sensing electrodes arranged in parallel, and wherein the three sensing electrodes are connected to each other by connecting wires in the non-display region.

5. The electromagnetic-type touch display apparatus according to claim 1 , wherein each electromagnetic induction coil of the plurality of first electromagnetic induction coils and the plurality of second electromagnetic induction coils comprises a first sensing electrode, a second sensing electrode and a third sensing electrode, wherein the connecting wires comprises a first and a second connecting wire segments arranged in the non-display region,
wherein the first sensing electrode and the second sensing electrode are connected by the first connecting wire segment, and the second sensing electrode and the third sensing electrode are connected to each other by the second connecting wire segment.

6. The electromagnetic-type touch display apparatus according to claim 1 , the first conductive layer is further configured as a transparent shielding electrode layer.

7. The electromagnetic-type touch display apparatus according to claim 1 , wherein in a case that the second conductive layer is configured as the common electrode layer, the first conductive layer is configured as a transparent shielding electrode layer on a second side of the first substrate not facing the second substrate or the black matrix layer on the first side of the first substrate facing the second substrate.

8. An electromagnetic-type touch display apparatus, comprising:
a first substrate;
a second substrate, arranged opposite to the first substrate, wherein a plurality of pixel units in rows and columns are formed on the second substrate;
a first conductive layer, wherein the first conductive layer comprises a plurality of first strip-shaped sensing electrodes arranged in parallel for forming a plurality of first electromagnetic induction coils, each of the plurality of first electromagnetic induction coils is formed with at least two of the plurality of first strip-shaped sensing electrodes and connection lines, each of the plurality of first strip-shaped sensing electrodes has two long sides extending in a first direction, and two short sides; and
a second conductive layer, wherein the second conductive layer comprises a plurality of second strip-shaped sensing electrodes arranged in parallel for forming a plurality of second electromagnetic induction coils, each of the plurality of second electromagnetic induction coils is formed with at least two of the plurality of second strip-shaped sensing electrodes and connection lines, and each of the plurality of second strip-shaped sensing electrodes has two long sides extending in a second direction perpendicular to the first direction and two short sides,
wherein, either one of the first substrate and the second substrate comprises a display region and a non-display region having a plurality of connecting wires,
wherein the first electromagnetic induction coils and the second electromagnetic induction coils are configured to determine a touch position,
wherein, the second conductive layer is configured as a black matrix layer on a first side of the first substrate facing the second substrate or a common electrode layer including a plurality of common electrodes disposed on the second substrate; and
wherein a projection onto the second substrate from each sensing electrode of the plurality of first strip-shaped sensing electrodes and the plurality of second strip-shaped sensing electrodes covers at least one row or one column of the plurality of pixel units on the second substrate.

9. An electromagnetic-type touch display apparatus comprising:
a first substrate;
a second substrate, arranged opposite to the first substrate, wherein a plurality of pixel units in rows and columns are formed on the second substrate;
a first conductive layer, wherein the first conductive layer comprises a plurality of first strip-shaped sensing electrodes arranged in parallel for forming a plurality of first electromagnetic induction coils, each of the plurality of first electromagnetic induction coils is formed with at least two of the plurality of first strip-shaped sensing electrodes and connection lines, each of the plurality of first strip-shaped sensing electrodes has two long sides extending in a first direction, and two short sides;
a second conductive layer, wherein the second conductive layer comprises a plurality of second strip-shaped sensing electrodes arranged in parallel for forming a plurality of second electromagnetic induction coils, each of the plurality of second electromagnetic induction coils i

Assignees

• Shanghai Tianma Microelectronics Co Ltd
• Tianma Microelectronics Co Ltd

Inventors

• Jiang Wenxin
• Huo Sitao

Classifications

• G06F3/044

  by capacitive means · CPC title

• G02F1/13338

  Input devices, e.g. touch panels · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G06F2203/04107

  Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds · CPC title