IN-CELL OLED TOUCH DISPLAY PANEL STRUCTURE WITH METAL LAYER FOR SENSING

• US 20140353691A1
• Filed: 08/12/2014
• Published: 12/04/2014
• Est. Priority Date: 05/22/2012
• Status: Active Grant

• Current Assignee: Superc-Touch Corporation
• Original Assignee: Superc-Touch Corporation
• Inventors: LEE, Hsiang-Yu
• Granted Patent: US 9,478,590 B2
• Time in Patent Office: Days
• US Class Current: 257/88
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04112 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 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: H10K 59/126 Shielding, e.g. light-blocking means over the TFTs
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens

Abstract

An in-cell OLED touch display panel structure with metal layer for sensing includes an upper substrate, a lower substrate parallel to the upper substrate, an OLED layer configured between the upper and lower substrates, a black matrix layer, a sensing electrode layer, and a thin film transistor layer. The black matrix layer is disposed at one surface of the upper substrate facing the OLED layer, and is composed of a plurality of opaque lines. The sensing electrode layer is disposed at one side of the black matrix layer facing the OLED layer, and is composed of a plurality of sensing conductor lines. The thin film transistor layer is disposed at one side of the lower substrate facing the OLED layer. The plurality of sensing conductor lines are disposed at positions corresponding to those of the plurality of opaque lines of the black matrix.

Claims

1. An in-cell OLED touch display panel structure with metal layer for sensing, comprising:

an upper substrate;

a lower substrate parallel to the upper substrate;

an OLED layer configured between the upper substrate and the lower substrate;

a black matrix layer disposed at one surface of the upper substrate facing the OLED layer, the black matrix layer being composed of a plurality of opaque lines;

a sensing electrode layer disposed at one side of the black matrix layer facing the OLED layer, the sensing electrode layer being composed of a plurality of sensing conductor lines; and

a thin film transistor layer disposed at one side of the lower substrate facing the OLED layer,

wherein the plurality of sensing conductor lines are disposed at positions corresponding to those of the plurality of opaque lines of the black matrix.

2. The in-cell OLED touch display panel structure with metal layer for sensing as claimed in claim 1, 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 mesh-like polygonal regions, where N is a positive integer, the sensing conductor lines in any one of the mesh-like polygonal regions being electrically connected together while the sensing conductor lines in any two mesh-like polygonal regions are not electrically connected, so as to form a single-layered touch pattern on the sensing electrode layer.

3. The in-cell OLED touch display panel structure with metal layer for sensing as claimed in claim 2, wherein the second group of sensing conductor lines is formed with N conductive traces, each of the N conductive traces being electrically connected to a corresponding mesh-like polygonal region, while any two conductive traces are not electrically connected.

4. The in-cell OLED touch display panel structure with metal layer for sensing as claimed in claim 3, wherein the plurality of sensing conductor lines of the sensing electrode layer are arranged in a first direction and a second direction.

5. The in-cell OLED touch display panel structure with metal layer for sensing as claimed in claim 4, wherein the first direction is vertical to the second direction.

6. The in-cell OLED touch display panel structure with metal layer for sensing as claimed in claim 5, wherein each of the mesh-like polygonal regions is formed in a triangle, rectangle, square, rhombus, pentagon, hexagon, octagon, or round shape.

7. The in-cell OLED touch display panel structure with metal layer for sensing as claimed in claim 6, wherein the plurality of sensing conductor lines are made of conductive metal material or alloy material.

8. The in-cell OLED touch display panel structure with metal layer for sensing as claimed in claim 7, wherein the conductive metal material is selectively to be chromium, barium, aluminum, silver, copper, titanium, nickel, tantalum, cobalt, tungsten, magnesium, calcium, potassium, lithium, indium, and their alloy.

9. The in-cell OLED touch display panel structure with metal layer for sensing as claimed in claim 8, wherein the thin film transistor layer include K gate lines and L source lines for driving corresponding pixel driving 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.

10. The in-cell OLED touch display panel structure with metal layer for sensing as claimed in claim 9, wherein the K gate lines and the L source lines are disposed at positions corresponding to those of the plurality of opaque lines of the black matrix layer.

11. The in-cell OLED touch display panel structure with metal layer for sensing as claimed in claim 10, further comprising:

a color filter layer disposed at one side of the black matrix layer and facing the OLED layer; and

an over coating layer disposed on a surface of the color filter.

12. The in-cell OLED touch display panel structure with metal layer for sensing as claimed in claim 11, further comprising:

a cathode layer disposed at one side of the over coating layer facing the OLED layer; and

an anode layer disposed at one side of the thin film transistor layer facing the OLED layer, the anode layer including a plurality of anode pixel electrodes, each of the anode pixel electrodes being connected to a source/drain of the pixel driving transistor of a corresponding pixel driving transistor.

13. The in-cell OLED touch display panel structure with metal layer for sensing as claimed in claim 11, further comprising:

a cathode layer disposed at one side of the thin film transistor layer facing the OLED layer, the cathode layer including a plurality of cathode pixel electrodes, each of the cathode pixel electrodes being connected to a source/drain of the pixel driving transistor of a corresponding pixel driving transistor; and

an anode layer disposed at one side of the over coating layer facing the OLED layer.