Touch device comprising pressure-sensing layer and flat touch sensing layer

Patent metadata

Field	Value
Publication number	US-10120468-B2
Application number	US-201615175056-A
Country	US
Kind code	B2
Filing date	Jun 7, 2016
Priority date	Jun 10, 2015
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

The disclosure provides a touch device, including a protection cover, a pressure-sensing layer and a flat touch-sensing electrode layer. The protection cover is used as an outer protection shield, and an upper surface of the protection cover is provided to users for pressing action. The pressure-sensing layer is disposed under the protection cover to detect touch strength. The flat touch-sensing electrode layer is disposed between the pressure-sensing layer and the protection cover to detect the position of the user's touch.

First claim

What is claimed is:

1. A touch device, comprising:
a protection cover used as an outer protection shield, wherein an upper surface of the protection cover is provided to users for a pressing action;
a pressure-sensing layer, disposed under the protection cover, configured to detect touch strength;
a flat touch-sensing electrode layer, disposed between the pressure-sensing layer and the protection cover, configured to detect a position of the pressing action, wherein the flat touch-sensing electrode layer is disposed directly on a bottom surface of the protection cover; and
a display panel, wherein:
the display panel is composed at least by a polarizer, an upper substrate, a color filter set, a liquid-crystal layer, a driver layer and a bottom substrate from top to bottom, and
the pressure-sensing layer is embedded in the display panel between the polarizer and the upper substrate.

2. The touch device as claimed in claim 1 , wherein:
the pressure-sensing layer at least comprises a radial pressure-sensing electrode,
the radial pressure-sensing electrode has a plurality of extension portions, and
each of the plurality of extension portions is presented as a radial pattern outwards from a center of the radial pressure-sensing electrode for increasing a pressure-detection sensitivity.

3. The touch device as claimed in claim 2 , wherein a size of the radial pressure-sensing electrode is about 25 mm 2 to 225 mm 2 .

4. The touch device as claimed in claim 2 , wherein the radial pressure-sensing electrode is a transparent wire bent and rounded in a radial pattern.

5. The touch device as claimed in claim 1 , wherein:
the pressure-sensing layer comprises a plurality of radial pressure-sensing electrodes,
each of the plurality of radial pressure-sensing electrodes is formed of a plurality of radial patterns bent and rounded by at least one transparent wire, and
at least two of the plurality of radial patterns are formed of one bent and rounded transparent wire.

6. The touch device as claimed in claim 4 , wherein a range of a linewidth of the transparent wire is 3 um-500 um.

7. The touch device as claimed in claim 4 , wherein a gauge factor of the transparent wire is greater than 0.5.

8. A touch device, comprising:
a pressure-sensing layer configured to detect touch strength, wherein:
the pressure-sensing layer comprises at least one radial pressure-sensing electrode,
the radial pressure-sensing electrode has a plurality of extension portions, and
each of the plurality of extension portions is presented as a radial pattern outwards from a center of the radial pressure-sensing electrode; and

a display panel, wherein:
the display panel is composed at least by a polarizer, an upper substrate, a color filter set, a liquid-crystal layer, a driver layer and a bottom substrate from top to bottom, and
the pressure-sensing layer is embedded in the display panel between the polarizer and the upper substrate.

9. The touch device as claimed in claim 8 , wherein the radial pressure-sensing electrode is a transparent wire bent and rounded in a radial pattern.

10. The touch device as claimed in claim 9 , wherein a gauge factor of the transparent wire is greater than 0.5.

11. The touch device as claimed in claim 8 , wherein:
the pressure-sensing layer comprises a plurality of radial pressure-sensing electrodes, and
each of the plurality of radial pressure-sensing electrodes is formed of a plurality of radial patterns bent and rounded by at least one transparent wire, and
at least two of the plurality of radial patterns are formed of one bent and rounded transparent wire.

12. The touch device as claimed in claim 8 , comprising:
a protection cover; and
a flat touch-sensing electrode layer disposed between the pressure-sensing layer and the protection cover, wherein the flat touch-sensing electrode layer is disposed directly on a bottom surface of the protection cover.

13. The touch device as claimed in claim 12 , wherein the flat touch-sensing electrode layer is configured to detect a position of a pressing action of a user.

14. A touch device, comprising:
a protection cover, used as an outer protection shield, an upper surface of the protection cover provided to users for a pressing action;
a pressure-sensing layer, disposed under the protection cover, configured to detect touch strength;
a flat touch-sensing electrode layer, disposed between the pressure-sensing layer and the protection cover, configured to detect position of the pressing action, wherein the flat touch-sensing electrode layer is disposed directly on a bottom surface of the protection cover; and
a display panel, wherein:
the display panel is composed at least by a polarizer, an upper substrate, a color filter set, a liquid-crystal layer, a driver layer and a bottom substrate from top to bottom, and
the pressure-sensing layer is embedded in the display panel between the upper substrate and color filter set.

15. The touch device as claimed in claim 14 , wherein:
the pressure-sensing layer at least comprises a radial pressure-sensing electrode,
the radial pressure-sensing electrode has a plurality of extension portions, and
each of the plurality of extension portions is presented as a radial pattern outwards from a center of the radial pressure-sensing electrode for increasing a pressure-detection sensitivity.

16. The touch device as claimed in claim 15 , wherein a size of the radial pressure-sensing electrode is about 25 mm 2 to 225 mm 2 .

17. The touch device as claimed in claim 15 , wherein the radial pressure-sensing electrode is a transparent wire bent and rounded in a radial pattern.

18. The touch device as claimed in claim 17 , wherein a range of a linewidth of the transparent wire is 3 um-500 um.

19. The touch device as claimed in claim 17 , wherein a gauge factor of the transparent wire is greater than 0.5.

20. The touch device as claimed in claim 14 , wherein:
the pressure-sensing layer comprises a plurality of radial pressure-sensing electrodes,
each of the plurality of radial pressure-sensing electrodes is formed of a plurality of radial patterns bent and rounded by at least one transparent wire, and
at least two of the plurality of radial patterns are formed of one bent and rounded transparent wire.

Assignees

• Tpk Touch Solutions Xiamen Inc

Inventors

• Chen Wenlong
• Chiang Cheng-Chung
• Jiang Yau-Chen
• Xie Yanjun
• Lai Bin
• Lin Ching-Shan

Classifications

• G02F1/134309

  characterised by their geometrical arrangement · CPC title

• G06F2203/04105

  Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G02F1/133528

  Polarisers · CPC title

• G06F2203/04106

  Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection · CPC title