In-cell touch display panel

Patent metadata

Field	Value
Publication number	US-10088715-B2
Application number	US-201715836934-A
Country	US
Kind code	B2
Filing date	Dec 11, 2017
Priority date	Dec 29, 2016
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

The in-cell touch display panel includes the following units. Multiple pixel regions are disposed in areas of the display area enclosed by gate lines that are intersected the data lines, in which each pixel region includes a pixel structure, and each pixel structure includes a pixel electrode. A common electrode includes multiple touch electrodes, in which each touch electrode corresponds to more than one pixel electrodes. A sub-common electrode is a portion of the touch electrode. The data lines and the sub-common electrodes are disposed on the same insulation layer. A metal connection structures is electrically connected to two adjacent ones of the sub-common electrodes along the second direction. The metal connection structure and the data lines are formed by different metal layers.

First claim

What is claimed is:

1. An in-cell touch display panel having a display area and a non-display area, wherein the in-cell touch display panel comprises:
a first substrate;
a plurality of data lines disposed on the first substrate along a first direction;
a plurality of gate lines disposed along a second direction, wherein an angle is included between the first direction and the second direction;
a plurality of touch sensing lines disposed on the first substrate, wherein an insulation layer is disposed between the data lines and the gate lines;
a plurality of pixel regions disposed in areas of the display area enclosed by the gate lines that are intersected with the data lines, wherein each of the pixel regions comprises a pixel structure, and each of the pixel structures comprises a pixel electrode;
a common electrode that is disposed in the display area and comprises a plurality of touch electrodes, wherein each of the touch electrodes corresponds to more than one of the pixel electrodes, and each of the pixel electrodes corresponds to a sub-common electrode which is a portion of the touch electrode;
a thin film transistor disposed in one of the pixel structures, wherein the thin film transistor comprises a gate, a source, a drain, and a semiconductor layer;
a second substrate, wherein a liquid crystal layer is disposed between the first substrate and the second substrate;
a plurality of display pads and a plurality of touch pads, wherein the display pads and the touch pads are disposed in the non-display area,
wherein the data lines and the sub-common electrodes are disposed on the insulation layer, and the pixel electrodes are disposed above the sub-common electrodes and are spatially insulated from the sub-common electrodes; and
a plurality of metal connection structures, wherein each of the metal connection structures is electrically connected to two adjacent ones of the sub-common electrodes along the second direction, and the metal connection structures and the data lines are formed by different metal layers.

2. The in-cell touch display panel of claim 1 , wherein in each of the touch electrodes, two adjacent ones of the sub-common electrodes along the first direction are directly connected to each other through an extending portion of the touch electrode, the extending portion crosses over one of the gate lines, and a width of the extending portion along the second direction is smaller than a width of the sub-common electrode along the second direction.

3. The in-cell touch display panel of claim 1 , wherein the two adjacent ones of the sub-common electrodes comprise a first sub-common electrode and a second sub-common electrode, the insulation layer is a first insulation layer, and the in-cell touch display panel comprises:
a first metal layer that is disposed on the first substrate and comprises the gate;
the first insulation layer disposed on the first metal layer;
the semiconductor layer disposed on the first insulation layer;
a second metal layer disposed on the first insulation layer, wherein the second metal layer comprises the source and the drain, and the data lines are formed by the second metal layer in the display area;
a first transparent conductive layer disposed on the first insulation layer, wherein the first transparent conductive layer comprises the first sub-common electrode and the second sub-common electrode;
a second insulation layer disposed on the second metal layer and on the first transparent conductive layer, the second insulation layer having a first contact hole, a second contact hole and a third contact hole, wherein the first contact hole exposes the drain, the second contact hole exposes the first sub-common electrode, and the third contact hole exposes the second sub-common electrode;
a third metal layer disposed on the second insulation layer, the third metal layer comprising the touch sensing lines and the metal connection structures, wherein one of the touch sensing lines is electrically connected to the first sub-common electrode through the second contact hole, and one of the metal connection structures extends from the second contact hole to the third contact hole and is electrically connected to the second sub-common electrode through the third contact hole;
a third insulation layer disposed on the third metal layer, wherein the third insulation layer has a fourth contact hole corresponding to the first contact hole; and
a second transparent conductive layer disposed on the third insulation layer, wherein the second transparent conductive layer comprises the pixel electrodes, and one of the pixel electrodes is electrically connected to the drain through the first contact hole and the fourth contact hole.

4. The in-cell touch display panel of claim 1 , wherein the two adjacent ones of the sub-common electrodes comprise a first sub-common electrode and a second sub-common electrode, the insulation layer is a first insulation layer, and the in-cell touch display panel comprises:
a first metal layer disposed on the first substrate, wherein the first metal layer comprises the metal connection structures and the gate;
the first insulation layer disposed on the first metal layer, the first insulation layer having a first contact hole and a second contact hole, wherein the first contact hole and the second contact hole expose one of the metal connection structures;
the semiconductor layer disposed on the first insulation layer;
a second metal layer disposed on the first insulation layer, wherein the second metal layer comprises the source and the drain, and the data lines are formed by the second metal layer in the display area;
a first transparent conductive layer disposed on the second metal layer, wherein the first transparent conductive layer comprises the first sub-common electrode and the second sub-common electrode, and the first sub-common electrode and the second sub-common electrode are electrically connected to the one of the metal connection structures through the first contact hole and the second contact hole respectively;
a second insulation layer disposed on the second metal layer and the first transparent conductive layer, the second insulation layer having a third contact hole and a fourth contact hole, wherein the third contact hole exposes the drain, and the fourth contact hole exposes the first sub-common electrode;
a third metal layer disposed on the second insulation layer, wherein the third metal layer comprises the touch sensing lines and the metal connection structure, and one of the touch sensing lines is electrically connected to the first sub-common electrode through the fourth contact hole;
a third insulation layer disposed on the third metal layer, wherein the third insulation layer has a fifth contact hole corresponding to the third contact hole; and
a second transparent conductive layer disposed on the third insulation layer, wherein the second transparent conductive layer comprises the pixel electrodes, and one of the pixel electrodes is electrically connected to the drain through the third contact hole and the fifth contact hole.

5. The in-cell touch display panel of claim 1 , wherein the two adjacent ones of the sub-common electrodes comprise a first sub-common electrode and a second sub-common electrode, the insulation layer is a second insulation layer, and the in-cell touch display panel comprises:
the semiconductor layer disposed on the first substrate, wherein the semiconductor layer comprises the source, a first lightly doped region, a channel region of the thin film transistor, a second lightly doped region, and the drain, wherein the channel region is disposed between the first lightly doped region and the second lightly doped region;
a first insulation layer disposed on the semiconductor layer, wherein the fi

Assignees

• Hannstar Display Nanjing Corp
• Hannstar Display Corp

Inventors

• Yeh Cheng-Yen

Classifications

• G02F1/136286

  Wiring, e.g. gate line, drain line · CPC title

• G02F1/134309 Primary

  characterised by their geometrical arrangement · CPC title

• G02F1/1368

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G02F1/133345

  Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence) · CPC title