In-cell inductive electronic paper touch display panels, touch detecting methods thereof and electronic devices

• US 10,514,813 B2
• Filed: 11/15/2017
• Issued: 12/24/2019
• Est. Priority Date: 05/27/2017
• Status: Active Grant

• Current Assignee: Shanghai AVIC Optoelectronics Company Limited (Tianma Microelectronics Company Limited)
• Original Assignee: Shanghai AVIC Optoelectronics Company Limited (Tianma Microelectronics Company Limited)
• Inventors: Xi, Kerui, Cui, Tingting
• Primary Examiner(s): Ritchie, Darlene M
• Application Number:
  US15/813,809
• Publication Number:
  US 20180074623A1
• Time in Patent Office: 769 Days
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/046 by electromagnetic means
• CPC Class Codes: G09G 3/344 based on particles moving in a fluid or in a gas, e.g. electrophoretic devices electrophoretic devices per se G02F1/167

Abstract

An electronic paper display panel, a touch detecting method thereof and an electronic device are provided. The electronic paper display panel includes: a first substrate and a pixel electrode array which is arranged on the first substrate; an inductance coil array disposed between the first substrate and the pixel electrode array and including a plurality of inductance coils arranged in array, each inductance coil has an input terminal and an output terminal; a plurality of driving lines arranged with the plurality of inductance coils respectively, each driving line is electrically connected to the input terminal of the corresponding inductance coil; and a plurality of touch lines arranged with the plurality of inductance coils respectively, each touch line is electrically connected to the output terminal of the corresponding inductance coil.

Claims

1. An electronic paper display panel, comprising:

a first substrate;

a pixel electrode array arranged on the first substrate;

an inductance coil array, disposed between the first substrate and the pixel electrode array, wherein the inductance coil array includes a plurality of inductance coils arranged in an array, each of the plurality of inductance coils has an input terminal and an output terminal;

a plurality of driving lines each corresponding to a respective one of the plurality of inductance coils and electrically connected to the input terminal of the respective one of the plurality of inductance coils; and

a plurality of touch lines each corresponding to a respective one of the plurality of inductance coils and electrically connected to the output terminal of the respective one of the plurality of inductance coils;

wherein the first substrate comprises a substrate and a thin film transistor array disposed on the substrate, wherein the thin film transistor array comprises a plurality of thin film transistors each having a drain electrode and a gate electrode;

wherein the pixel electrode array comprises a plurality of pixel electrodes, each corresponding to a respective one of the plurality of thin film transistors, and electrically connected to the drain electrode of the respective one of the plurality of thin film transistors; and

wherein the plurality of touch lines is arranged at a same layer as the gate electrodes of the plurality of thin film transistors and is insulated from the gate electrodes of the plurality of thin film transistors.

2. The electronic paper display panel of claim 1, wherein the plurality of driving lines is arranged between the thin film transistor array and the inductance coil array.

3. An electronic paper display panel, comprising:

a first substrate;

a pixel electrode array arranged on the first substrate;

an inductance coil array, disposed between the first substrate and the pixel electrode array, wherein the inductance coil array includes a plurality of inductance coils arranged in an array, each of the plurality of inductance coils has an input terminal and an output terminal;

a plurality of driving lines each corresponding to a respective one of the plurality of inductance coils and electrically connected to the input terminal of the respective one of the plurality of inductance coils;

a plurality of touch lines each corresponding to a respective one of the plurality of inductance coils and electrically connected to the output terminal of the respective one of the plurality of inductance coils; and

a plurality of compensation light shielding blocks arranged at a same layer as the inductance coil array and insulated from the inductance coil array, wherein projections of the plurality of compensation light shielding blocks in a direction perpendicular to the electronic paper display panel shadow the plurality of thin film transistors,

wherein the first substrate comprises a substrate and a thin film transistor array disposed on the substrate, wherein the thin film transistor array comprises a plurality of thin film transistors each having a drain electrode and a gate electrode;

wherein the pixel electrode array comprises a plurality of pixel electrodes, each corresponding to a respective one of the plurality of thin film transistors, and electrically connected to the drain electrode of the respective one of the plurality of thin film transistors.

4. The electronic paper display panel of claim 3, wherein the plurality of compensation light shielding blocks and the plurality of inductance coils are made of a same material.

5. An electronic paper display panel, comprising:

a first substrate;

a pixel electrode array arranged on the first substrate;

an inductance coil array disposed between the first substrate and the pixel electrode array, wherein the inductance coil array includes a plurality of inductance coils arranged in an array, each of the plurality of inductance coils has an input terminal and an output terminal;

a plurality of driving lines each corresponding to a respective one of the plurality of inductance coils and electrically connected to the input terminal of the respective one of the plurality of inductance coils; and

a plurality of touch lines each corresponding to a respective one of the plurality of inductance coils and electrically connected to the output terminal of the respective one of the plurality of inductance coils;

wherein the first substrate comprises a substrate and a thin film transistor array disposed on the substrate, wherein the thin film transistor array comprises a plurality of thin film transistors each having a drain electrode and a gate electrode;

wherein the pixel electrode array comprises a plurality of pixel electrodes, each corresponding to a respective one of the plurality of thin film transistors, and electrically connected to the drain electrode of the respective one of the plurality of thin film transistors; and

wherein the plurality of driving lines is arranged at the same layer with the drain electrodes of the plurality of thin film transistors and is insulated from the drain electrodes of the plurality of thin film transistors.

6. The electronic paper display panel of claim 5, wherein the plurality of touch lines is arranged between the thin film transistor array and the inductance coil array.

7. The electronic paper display panel of claim 5, wherein the plurality of touch lines is arranged between the inductance coil array and the pixel electrode array.

8. The electronic paper display panel of claim 5, further comprising a compensation light shielding layer, wherein a projection of the compensation light shielding layer in a direction perpendicular to the electronic paper display panel shadows the plurality of thin film transistors;

and

wherein the compensation light shielding layer is arranged between the thin film transistor array and the inductance coil array.

9. An electronic paper display panel, comprising:

a first substrate;

a pixel electrode array arranged on the first substrate;

an inductance coil array, disposed between the first substrate and the pixel electrode array, wherein the inductance coil array includes a plurality of inductance coils arranged in an array, each of the plurality of inductance coils has an input terminal and an output terminal;

a plurality of driving lines each corresponding to a respective one of the plurality of inductance coils and electrically connected to the input terminal of the respective one of the plurality of inductance coils; and

a plurality of touch lines each corresponding to a respective one of the plurality of inductance coils and electrically connected to the output terminal of the respective one of the plurality of inductance coils;

wherein the first substrate comprises a substrate and a thin film transistor array disposed on the substrate, wherein the thin film transistor array comprises a plurality of thin film transistors each having a drain electrode and a gate electrode;

wherein the pixel electrode array comprises a plurality of pixel electrodes, each corresponding to a respective one of the plurality of thin film transistors, and electrically connected to the drain electrode of the respective one of the plurality of thin film transistors; and

wherein the plurality of driving lines is arranged at a same layer as the gate electrodes of the plurality of thin film transistors and is insulated from the gate electrodes of the plurality of thin film transistors.

10. The electronic paper display panel of claim 9, further comprising a compensation light shielding layer, wherein a projection of the compensation light shielding layer in a direction perpendicular to the electronic paper display panel shadows the plurality of thin film transistors;

and

wherein the compensation light shielding layer is arranged between the inductance coil array and the pixel electrode array.

11. The electronic paper display panel of claim 9, further comprising an electrophoretic function layer, a common electrode layer and a protection film, sequentially arranged on the pixel electrode array, and a peripheral driving circuit arranged on the first substrate;

wherein the peripheral driving circuit has a driving signal terminal and a plurality of touch signal terminals, wherein the driving signal terminal of the peripheral driving circuit is electrically connected to the plurality of driving lines, respectively, wherein the plurality of touch signal terminals each is electrically connected to one of the plurality of touch lines.

12. An electronic paper display panel, comprising:

a first substrate;

a pixel electrode array arranged on the first substrate;

an inductance coil array disposed between the first substrate and the pixel electrode array, wherein the inductance coil array includes a plurality of inductance coils arranged in an array, each of the plurality of inductance coils has an input terminal and an output terminal;

a plurality of driving lines each corresponding to a respective one of the plurality of inductance coils and electrically connected to the input terminal of the respective one of the plurality of inductance coils; and

a plurality of touch lines each corresponding to a respective one of the plurality of inductance coils and electrically connected to the output terminal of the respective one of the plurality of inductance coils;

wherein the first substrate comprises a substrate and a thin film transistor array disposed on the substrate, wherein the thin film transistor array comprises a plurality of thin film transistors each having a drain electrode and a gate electrode;

wherein the pixel electrode array comprises a plurality of pixel electrodes, each corresponding to a respective one of the plurality of thin film transistors, and electrically connected to the drain electrode of the respective one of the plurality of thin film transistors; and

wherein the plurality of touch lines is arranged at a same layer as the drain electrodes of the plurality of thin film transistors and is insulated from the drain electrodes of the plurality of thin film transistors.

13. The electronic paper display panel of claim 12, wherein the plurality of driving lines is arranged at a same layer as the gate electrodes of the plurality of thin film transistors.

14. The electronic paper display panel of claim 12, wherein the plurality of inductance coils is further configured to shield light as light shielding coils, wherein windings of the plurality of inductance coils have compensation light shielding regions corresponding to the plurality of thin film transistors, wherein projections of the windings in the compensation light shielding region in a direction perpendicular to the electronic paper display panel shadows the plurality of thin film transistors.

15. The electronic paper display panel of claim 12, wherein a distance between center points of two adjacent inductance coils in a row direction of the inductance coil array ranges from 1 mm to 7 mm, and a distance between center points of two adjacent inductance coils in a column direction of the inductance coil array ranges from 1 mm to 7 mm.

16. The electronic paper display panel of claim 12, further comprising an electrophoretic function layer, a common electrode layer and a protection film, sequentially arranged on the pixel electrode array, and a peripheral driving circuit arranged on the first substrate;

wherein the peripheral driving circuit has a driving signal terminal and a plurality of touch signal terminals, wherein the driving signal terminal of the peripheral driving circuit is electrically connected to the plurality of driving lines, respectively, wherein the plurality of touch signal terminals each is electrically connected to one of the plurality of touch lines.

17. The electronic paper display panel of claim 12, wherein the plurality of inductance coils is wound in squares or circles to form multi-turn inductance coils.

18. The electronic paper display panel of claim 12, further comprising a compensation light shielding layer, wherein a projection of the compensation light shielding layer in a direction perpendicular to the electronic paper display panel shadows the plurality of thin film transistors;

and

wherein the compensation light shielding layer is arranged between the thin film transistor array and the inductance coil array, or, the compensation light shielding layer is arranged between the inductance coil array and the pixel electrode array.

19. The electronic paper display panel of claim 18, wherein the compensation light shielding layer is divided into a plurality of compensation light shielding blocks, each corresponding to a respective one of the plurality of thin film transistors, wherein a projection of the plurality of compensation light shielding blocks each in a direction perpendicular to the electronic paper display panel shadows said thin film transistor.

20. The electronic paper display panel of claim 18, wherein a space between two adjacent turns of one of the plurality of inductance coils is greater than or equal to 4 μ

m, and a wire diameter of the plurality of inductance coils is greater than or equal to 2 μ

m.