High-sensitivity self-capacitance in-cell touch display panel device

• US 9,965,119 B2
• Filed: 11/04/2015
• Issued: 05/08/2018
• Est. Priority Date: 11/07/2014
• Status: Active Grant

• Current Assignee: Superc-Touch Corporation
• Original Assignee: Superc-Touch Corporation
• Inventors: Lee, Hsiang-Yu, Chin, Shang, Lin, Ping-Tsun
• Primary Examiner(s): Adediran, Abdul-Samad A
• Application Number:
  US14/932,496
• Publication Number:
  US 20160132154A1
• Time in Patent Office: 916 Days
• Field of Search: 345173-174, 349 12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers

Abstract

A high-sensitivity self-capacitance in-cell touch display panel device includes a sensing electrode layer having plural sensing electrodes, a display control circuit, a touch sensing control circuit, and an amplifier with gain greater than zero. The display control circuit is powered by a first power source and connected to a first ground. The touch sensing control circuit is coupled to the sensing electrodes for performing a touch sensing. The touch sensing control circuit is powered by a second power source and connected to a second ground, wherein the first power source and the first ground are different from the second power source and the second ground. The amplifier is connected to the touch sensing control circuit and a common voltage layer. The touch sensing control circuit applies a sensing signal sensed by at least one sensing electrode to the amplifier for being amplified and applied to the common voltage layer.

Claims

1. A high-sensitivity self-capacitance in-cell touch display panel device, comprising:

a first substrate;

a second substrate parallel to the first substrate;

a display material layer configured between the first substrate and the second substrate;

a common voltage layer disposed between the first substrate and the display material layer;

a sensing electrode layer disposed between the first substrate and the common voltage layer, and having a plurality of sensing electrodes;

a plurality of sensing electrode selection switches, each corresponding to exactly one of the sensing electrodes;

a display control circuit for controlling the high-sensitivity self-capacitance in-cell touch display panel device to display an image wherein the display control circuit is powered by a first power source and is connected to a first ground;

a touch sensing control circuit connected to the plurality of sensing electrode selection switches for controlling each of the sensing electrodes to perform a self-capacitance touch sensing, wherein the touch sensing control circuit is powered by a second power source and is connected to a second ground; and

an amplifier with gain greater than zero connected to the touch sensing control circuit and the common voltage layer, wherein the first power source and the first ground are different from the second power source and the second ground, and

wherein in detection of a touch position a sensing signal from a sensing electrode of the plurality of sensing electrodes is applied to the common voltage layer through the amplifier by the touch sensing control circuit so as to reduce a capacitance between the sensing electrode and the common voltage layer.

2. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 1, further comprising:

a black matrix layer disposed at one side of the first substrate facing the display material layer, the black matrix layer being composed of a plurality of opaque lines arranged in a first direction and a second direction thereby defining a plurality of light-penetrating blocks, wherein the first direction is perpendicular to the second direction;

a color filter layer disposed at one side of black matrix layer facing the display material layer;

a first polarizer layer disposed at one side the first substrate opposite to the other side of the first substrate facing the display material layer;

a thin film transistor layer disposed at the side of the second substrate facing the display material layer, and including K gate lines and L source lines, where K and L are each a positive integer, the K gate lines being arranged in the first direction and the L source lines being arranged in the second direction for forming a plurality of pixel blocks, each pixel block having a pixel transistor and a capacitor corresponding thereto, so as to drive the corresponding pixel transistor and capacitor according to a display pixel signal and a display driving signal thereby performing a display operation; and

a second polarizer layer disposed at one side of the second substrate opposite to the other side of the second substrate facing the display material layer,

wherein the plurality of opaque lines is disposed at positions corresponding to those of the K gate lines and L source lines.

3. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 2, wherein each of the sensing electrodes is a polygon, circle, ellipse, star, wedge shape, radiation shape, triangle, pentagon, hexagon, octagon, rectangle, or square.

4. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 3, wherein each of the sensing electrodes is made of material selected from the group consisting of indium tin oxide, zinc tin oxide thin film, ETO, nano silver, conductive polymer, carbon nanotube, and graphene.

5. A high-sensitivity self-capacitance in-cell touch display panel device, comprising:

a first substrate;

a common voltage layer;

a second substrate parallel to the first substrate;

a display material layer configured between the first substrate and the second substrate;

a plurality of sensing electrodes, each formed by metal mesh;

a plurality of sensing electrode selection switches, each corresponding to exactly one of the sensing electrodes;

a display control circuit for controlling the high-sensitivity self-capacitance in-cell touch display panel device to display an image, wherein the display control circuit is powered by a first power source and is connected to a first ground;

a touch sensing control circuit connected to the plurality of sensing electrode selection switches for controlling each of the sensing electrodes to perform a self-capacitance touch sensing, wherein the touch sensing control circuit is powered by a second power source and is connected to a second ground; and

an amplifier with gain greater than zero connected to the touch sensing control circuit and the common voltage layer,

wherein the first power source and the first ground are different from the second power source and the second ground, and

in detection of a touch position, a sensing signal from a sensing electrode of the plurality of sensing electrodes is applied to the common voltage layer through the amplifier by the touch sensing control circuit so as to reduce a capacitance between the sensing electrode and the common voltage layer.

6. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 5, further comprising:

a black matrix layer disposed at one side of the first substrate facing the display material layer, the black matrix layer being composed of a plurality of opaque lines arranged in a first direction and a second direction thereby defining a plurality of light-penetrating blocks, wherein the first direction is perpendicular to the second direction;

a color filter layer disposed at one side of black matrix layer facing the display material layer;

a first polarizer layer disposed at one side the first substrate opposite to the other side of the first substrate facing the display material layer;

a thin film transistor layer disposed at the side of the second substrate facing the display material layer, and including K gate lines and L source lines, where K and L are each a positive integer, the K gate lines being arranged in the first direction and the L source lines being arranged in the second direction for forming a plurality of pixel blocks, each pixel block having a pixel transistor and a capacitor corresponding thereto, so as to drive the corresponding pixel transistor and capacitor according to a display pixel signal and a display driving signal thereby performing a display operation; and

a second polarizer layer disposed at one side of the second substrate opposite to the other side of the second substrate facing the display material layer.

7. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 6, wherein the plurality of opaque lines is disposed at positions corresponding to those of the K gate lines and L source lines.

8. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 7, wherein each sensing electrode formed by metal mesh is a polygon, circle, ellipse, star, wedge shape, radiation shape, triangle, pentagon, hexagon, octagon, rectangle, or square.

9. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 8, wherein each sensing electrode formed by metal mesh is made of material selected from the group consisting of chromium, barium, molybdenum, aluminum, silver, copper, titanium, nickel, tantalum, cobalt, tungsten, magnesium, calcium, potassium, lithium, indium, an alloy thereof, fluorine lithium, magnesium fluoride, and lithium oxide.

10. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 9, wherein the plurality of sensing electrodes is disposed at one side of the black matrix layer facing the display material layer.

11. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 9, wherein the plurality of sensing electrodes is disposed in the thin film transistor layer.

12. A high-sensitivity self-capacitance in-cell touch display panel device, comprising:

a first substrate;

a second substrate parallel to the first substrate;

a display material layer configured between the first substrate and the second substrate;

a cathode layer disposed at one side of the first substrate facing the display material;

a sensing electrode layer disposed between the first substrate and the second substrate, and having a plurality of sensing electrodes;

a plurality of sensing electrode selection switches, each corresponding to exactly one of the sensing electrodes;

a display control circuit for controlling the high-sensitivity self-capacitance in-cell touch display panel device to display an image, wherein the display control circuit is powered by a first power source and is connected to a first ground;

a touch sensing control circuit connected to the plurality of sensing electrode selection switches for controlling each of the sensing electrodes to perform a self-capacitance touch sensing, wherein the touch sensing control circuit is powered by a second power source and is connected to a second ground; and

an amplifier with gain greater than zero connected to the touch sensing control circuit and the cathode layer,

wherein the first power source and the first ground are different from the second power source and the second ground, and

in detection of a touch position, a sensing signal from a sensing electrode of the plurality of sensing electrodes is applied to the cathode layer through the amplifier by the touch sensing control circuit so as to reduce a capacitance between the sensing electrode and the cathode layer.

13. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 12, further comprising:

a thin film transistor layer disposed at one side of the second substrate facing the display material layer, and including K gate lines and L source lines, where K and L are each a positive integer, the K gate lines being arranged in a first direction and the L source lines being arranged in a second direction for forming a plurality of pixel blocks, each pixel block having a pixel transistor and a capacitor corresponding thereto, so as to drive the corresponding pixel transistor and capacitor according to a display pixel signal and a display driving signal thereby performing a display operation, wherein the first direction is perpendicular to the second direction.

14. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 13, further comprising:

a black matrix layer disposed at one side of the first substrate facing the display material layer, the black matrix layer being composed of a plurality of opaque lines arranged in the first direction and the second direction thereby defining a plurality of light-penetrating blocks; and

a color filter layer disposed at one side of black matrix layer facing the display material layer,

wherein the plurality of opaque lines is disposed at positions corresponding to those of the K gate lines and L source lines.

15. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 13, wherein each of the sensing electrodes is a polygon, circle, ellipse, star, wedge shape, radiation shape, triangle, pentagon, hexagon, octagon, rectangle, or square.

16. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 15, wherein each of the sensing electrodes is made of material selected from the group consisting of indium tin oxide, zinc tin oxide thin film, ETO, nano silver, conductive polymer, carbon nanotube, and graphene.

17. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 15, wherein each sensing electrode is formed by metal mesh.

18. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 17, wherein each sensing electrode formed by metal mesh is made of material selected from the group consisting of chromium, barium, molybdenum, aluminum, silver, copper, titanium, nickel, tantalum, cobalt, tungsten, magnesium, calcium, potassium, lithium, indium, an alloy thereof, fluorine lithium, magnesium fluoride, and lithium oxide.

19. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 18, wherein the plurality of sensing electrodes is disposed at one side of the black matrix layer facing the display material layer.

20. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 18, wherein the plurality of sensing electrodes is disposed in the thin film transistor layer.

21. A high-sensitivity self-capacitance in-cell touch display panel device, comprising:

a first substrate;

a second substrate parallel to the first substrate;

a display material layer configured between the first substrate and the second substrate;

an anode layer disposed at one side of the first substrate facing the display material;

a sensing electrode layer disposed between the first substrate and the second substrate, and having a plurality of sensing electrodes;

a plurality of sensing electrode selection switches, each corresponding to exactly one of the sensing electrodes;

a display control circuit for controlling the high-sensitivity self-capacitance in-cell touch display panel device to display an image, wherein the display control circuit is powered by a first power source and is connected to a first ground;

a touch sensing control circuit connected to the plurality of sensing electrode selection switches for controlling each of the sensing electrodes to perform a self-capacitance touch sensing, wherein the touch sensing control circuit is powered by a second power source and is connected to a second ground; and

an amplifier with gain greater than zero connected to the touch sensing control circuit and the anode layer,

wherein the first power source and the first ground are different from the second power source and the second ground, and

in detection of a touch position a sensing signal from a sensing electrode of the plurality of sensing electrodes is applied to the anode layer through the amplifier by the touch sensing control circuit so as to reduce a capacitance between the sensing electrode and the anode layer.

22. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 21, further comprising:

a thin film transistor layer disposed at one side of the second substrate facing the display material layer, and including K gate lines and L source lines, where K and L are each a positive integer, the K gate lines being arranged in a first direction and the L source lines being arranged in a second direction for forming a plurality of pixel blocks, each pixel block having a pixel transistor and a capacitor corresponding thereto, so as to drive the corresponding pixel transistor and capacitor according to a display pixel signal and a display driving signal thereby performing a display operation, wherein the first direction is perpendicular to the second direction.

23. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 22, further comprising:

a black matrix layer disposed at one side of the first substrate facing the display material layer, the black matrix layer being composed of a plurality of opaque lines arranged in the first direction and the second direction thereby defining a plurality of light-penetrating blocks; and

a color filter layer disposed at one side of black matrix layer facing the display material layer,

wherein the plurality of opaque lines is disposed at positions corresponding to those of the K gate lines and L source lines.

24. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 22, wherein each of the sensing electrodes is a polygon, circle, ellipse, star, wedge shape, radiation shape, triangle, pentagon, hexagon, octagon, rectangle, or square.

25. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 24, wherein each of the sensing electrodes is made of material selected from the group consisting of indium tin oxide, zinc tin oxide thin film, ETO, nano silver, conductive polymer, carbon nanotube, and graphene.

26. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 24, wherein each sensing electrode is formed by metal mesh.

27. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 26, wherein each sensing electrode formed by metal mesh is made of material selected from the group consisting of chromium, barium, molybdenum, aluminum, silver, copper, titanium, nickel, tantalum, cobalt, tungsten, magnesium, calcium, potassium, lithium, indium, an alloy thereof, fluorine lithium, magnesium fluoride, and lithium oxide.

28. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 27, wherein the plurality of sensing electrodes is disposed at one side of the black matrix layer facing the display material layer.

29. The high-sensitivity self-capacitance in-cell touch display panel device as claimed in claim 27, wherein the plurality of sensing electrodes is disposed in the thin film transistor layer.