IN-CELL TOUCH PANEL STRUCTURE OF NARROW BORDER

• US 20150009426A1
• Filed: 07/03/2014
• Published: 01/08/2015
• Est. Priority Date: 07/05/2013
• Status: Active Grant

• Current Assignee: Superc-Touch Corporation
• Original Assignee: Superc-Touch Corporation
• Inventors: LEE, Hsiang-Yu
• Granted Patent: US 9,250,492 B2
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

An in-cell touch panel structure of narrow border includes an upper substrate, a lower substrate, a liquid crystal layer configured between the upper and lower substrates, a black matrix layer, a first sensing electrode layer, and a second sensing electrode layer. The first sensing electrode layer includes plural first conductor line units and plural connection lines arranged in a first direction. The second sensing electrode layer includes plural second conductor line units arranged in a second direction. When performing a touch sensing and receiving the touch driving signal, each second conductor line unit makes use of a corresponding connection line to be extended to one edge of the panel structure. The first conductor line units, the connection lines, and the second conductor line units are disposed corresponding to positions of the plurality of opaque lines of the black matrix layer.

Claims

1. An in-cell touch panel structure of narrow border, comprising:

an upper substrate;

a lower substrate parallel to the upper substrate;

a liquid crystal layer configured between the upper substrate and the lower substrates;

a black matrix layer arranged on one side of the upper substrate facing the liquid crystal layer, the black matrix layer being composed of a plurality of opaque lines;

a first sensing electrode layer arranged on one side of the black matrix facing the liquid crystal layer and including M first conductor line units and N connection lines arranged in a first direction for detecting whether there is an external object approached according to a touch driving signal, where M and N are each a positive integer; and

a second sensing electrode layer arranged on one side of the first sensing electrode layer facing the liquid crystal layer and including N second conductor line units arranged in a second direction, wherein, when performing a touch sensing and receiving the touch driving signal, each of the N second conductor line units makes use of a corresponding i-th connection line to be extended to one edge of the panel structure, where i is a positive integer and 1≦

i≦

N,

wherein the M first conductor line units, the N connection lines, and the N second conductor line units are disposed corresponding to positions of the plurality of opaque lines of the black matrix layer.

2. The in-cell touch panel structure of narrow border as claimed in claim 1, wherein each of the M first conductor line units is extended to the same edge of the panel structure through a corresponding metal wire for being further connected to a flexible circuit board.

3. The in-cell touch panel structure of narrow border as claimed in claim 2, wherein the N connection lines are made of conductive metal material.

4. The in-cell touch panel structure of narrow border as claimed in claim 3, wherein each of the M first conductor line units is composed of plural metal sensing lines, and each of the N second conductor line units is composed of plural metal sensing lines.

5. The in-cell touch panel structure of narrow border as claimed in claim 4, wherein the plural metal sensing lines of each of the M first conductor line units form a quadrilateral region, and the plural metal sensing lines of each of the N second conductor line units form a quadrilateral region, such that the metal sensing lines in each quadrilateral region are electrically connected together, while any two of the quadrilateral regions are not connected with each other.

6. The in-cell touch panel structure of narrow border as claimed in claim 5, wherein the first direction is vertical with the second direction.

7. The in-cell touch panel structure of narrow border as claimed in claim 6, wherein each of the N connection lines is disposed between two first conductor line units.

8. The in-cell touch panel structure of narrow border as claimed in claim 7, wherein the quadrilateral region has a shape of rectangle or square.

9. The in-cell touch panel structure of narrow border as claimed in claim 8, wherein the metal sensing lines in each quadrilateral region formed by the plural metal sensing lines of each of the M first conductor line units and the N second conductor line units are made of conductive metal material or alloy material.

10. The in-cell touch panel structure of narrow border as claimed in claim 9, wherein the conductive metal material is selectively to be chromium, barium, aluminum, silver, copper, titanium, nickel, tantalum, cobalt, tungsten, magnesium, calcium, potassium, lithium, indium, or a mixture of LiF, MgF2 or Li2O.

11. The in-cell touch panel structure of narrow border as claimed in claim 10, further comprising:

a thin film transistor layer arranged on one side of the lower substrate facing the liquid crystal layer, and including K gate lines and L source lines for driving corresponding pixel transistor and pixel capacitor based on a display pixel signal and a display driving signal, so as to perform a display operation, where K and L are each a positive integer;

a color filter layer arranged on one side of the black matrix layer facing the liquid crystal layer;

a common electrode layer disposed between the upper substrate and the lower substrate;

a first polarizer layer arranged on one side the upper substrate opposite to the other side of the upper substrate facing the liquid crystal layer; and

a second polarizer layer arranged on one side of the lower substrate opposite to the other side of the lower substrate facing the liquid crystal layer.