IN-CELL TOUCH DISPLAY PANEL SYSTEM WITH INCREASED ACCURACY OF TOUCH POSITIONS

• US 20130328829A1
• Filed: 06/07/2013
• Published: 12/12/2013
• Est. Priority Date: 06/08/2012
• Status: Abandoned Application

• Current Assignee: Superc-Touch Corporation
• Original Assignee: Superc-Touch Corporation
• Inventors: LEE, Hsiang-Yu
• Application Number:
  US13/912,895
• Publication Number:
  US 20130328829A1
• Time in Patent Office: Days
• US Class Current: 345/174
• 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: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

An in-cell touch display panel system with increased accuracy of touch positions includes a panel display unit, a touch unit, a display unit power supply, and a touch unit power supply. The display unit power supply has a power supply end and a ground end for supplying power to the panel display unit. The touch unit power supply has a first switch, a second switch and an energy storage device. The first switch has one end connected to the power supply end and the other end connected to one end of the energy storage device. The second switch has one end connected to the ground end and the other end connected to the other end of the energy storage device. When the touch unit performs a touching detection, the first and second switches disconnect the energy storage device from the power supply end and the ground end.

Claims

1. An in-cell touch display panel system with increased accuracy of touch positions, comprising:

a panel display unit for displaying an image;

a touch unit for performing a touch detection;

a display unit power supply with a power supply end and a ground end for supplying power to the panel display unit; and

a touch unit power supply including a first switch, a second switch, and an energy storage device, wherein the first switch has one end connected to the power supply end and the other end connected to one end of the energy storage device, and the second switch has one end connected to the ground end and the other end connected to the other end of the energy storage device, such that, when the touch unit performs the touching detection, the first switch disconnects the energy storage device from the power supply end while the second switch disconnects the energy storage device from the ground end.

2. The system as claimed in claim 1, wherein the panel display unit includes a sensing display panel with metal layer having an sensing electrode layer comprised of a plurality of sensing conductor lines so as to form a plurality of touch electrodes, and the touch unit has a touch controller connected to the touch unit power supply and the touch electrodes for sending touch driving signal to the touch electrodes and detecting voltages of the touch electrodes, and wherein, when the touch controller sends the touch driving signal to one of the touch electrodes, the touch controller also sends a counteracting signal corresponding to the touch driving signal to other touch electrodes.

3. The system as claimed in claim 2, wherein the counteracting signal is a ground signal.

4. The system as claimed in claim 2, wherein the counteracting signal is a signal with same frequency but different amplitude than the touch driving signal.

5. The system as claimed in claim 2, wherein the sensing display panel with metal layer comprises:

a first substrate;

a second substrate parallel to the first substrate;

a liquid crystal layer configured between the first substrate and the second substrates; and

a black matrix layer disposed at one surface of the first substrate facing the liquid crystal layer, the black matrix layer being composed of a plurality of opaque lines,

wherein the sensing electrode layer is disposed at one surface of the black matrix layer facing the liquid crystal layer, the plurality of sensing conductor lines of the sensing electrode layer is disposed corresponding to positions of the plurality of opaque lines of the black matrix layer.

6. The system as claimed in claim 5, wherein the plurality of sensing conductor lines are divided into a first group of sensing conductor lines and a second group of sensing conductor lines, the first group of sensing conductor lines being formed with N quadrilateral regions, where N is an integer greater than one, the sensing conductor lines in any one of the quadrilateral regions being electrically connected together while the sensing conductor lines in any two quadrilateral regions are not electrically connected, so as to form a single-layered touch pattern on the sensing electrode layer.

7. The system as claimed in claim 6, wherein the second group of sensing conductor lines is formed with N conductor traces, each of the N conductor traces being electrically connected to a corresponding quadrilateral region, while any two conductor traces are not electrically connected.

8. The system as claimed in claim 7, wherein the sensing conductor lines of the sensing electrode layer are arranged in a first direction and a second direction.

9. The system as claimed in claim 8, wherein the first direction is vertical to the second direction.

10. The system as claimed in claim 9, further comprising:

a color filter disposed among the sensing conductor lines of the sensing electrode layer and on the surface of the plurality of sensing conductor lines;

an overcoat layer disposed on a surface of the color filter;

a common electrode layer disposed between the first substrate and the second substrate; and

a thin film transistor layer disposed on a surface of the second substrate facing the liquid crystal layer.

11. The system as claimed in claim 10, wherein each of the quadrilateral regions is formed in a rectangle, square, or rhombus shape.

12. The system as claimed in claim 11, wherein the sensing conductor lines of the sensing electrode layer are made of conductive metal material or alloy material.

13. The system as claimed in claim 12, wherein the conductive metal material is selectively to be chromium, barium, and aluminum.

14. The system as claimed in claim 13, wherein the panel display unit further comprises:

a source driver connected to the sensing display panel with metal layer for driving the sensing display panel with metal layer according to a display pixel signal;

a gate driver connected to the sensing display panel with metal layer for generating a display driving signal to drive the sensing display panel with metal layer; and

a display timing controller connected to the source driver and the gate driver for providing a timing of the display pixel signal outputted by the source driver and a timing of the display driving signal outputted by the gate driver.