CN110362227B

CN110362227B - Touch panel and touch display device

Info

Publication number: CN110362227B
Application number: CN201910552512.1A
Authority: CN
Inventors: 陈泽升
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2021-01-01
Anticipated expiration: 2039-06-25
Also published as: CN110362227A; WO2020258382A1

Abstract

A touch display device includes a touch panel including metal traces, an active region, and an integrated circuit. The metal traces include drive traces and sense traces. The active region includes a sensor. The sensor is connected with the driving wire and the sensing wire. The driving wires and the sensing wires are connected with the integrated circuit through the through holes in the dielectric layer, so that the touch display device achieves the effects of being light and thin and having a narrow frame.

Description

Touch panel and touch display device

Technical Field

The present invention relates to a touch panel, and more particularly, to a touch panel in a touch display device.

Background

According to fig. 1, the conventional touch panel 10 has to apply a voltage to both ends of a metal trace (especially, a driving trace) to ensure the uniformity of an electric field in a driving direction. The metal traces are electrically connected to the integrated circuit 30 at the bottom by the edges of the touch sensor 20. The metal traces include a driving trace 40 and a sensing trace 50. In addition, due to the large number of metal traces, the touch display device with the conventional touch panel 10 cannot realize a narrow frame and a light weight.

Disclosure of Invention

The touch panel of the embodiment of the invention comprises metal wires, an active area and an integrated circuit. The active area comprises a sensor which is connected with a driving wire and a sensing wire. The metal traces include drive traces and sense traces. The driving wires and the sensing wires are connected with the integrated circuit through the through holes in the dielectric layer.

In an embodiment of the invention, the driving trace and the sensing trace are disposed below the sensor of the active region.

In an embodiment of the invention, the dielectric layer includes a first dielectric layer and a second dielectric layer, and the driving trace and the sensing trace are disposed on the first dielectric layer and between the second dielectric layer.

In one embodiment of the invention, the sensor associated with the drive trace and the sensor associated with the sense trace are not connected to each other.

In an embodiment of the invention, the number of the driving traces is greater than the number of the sensing traces.

In an embodiment of the invention, the driving trace is connected to the driving electrode, and the sensing trace is connected to the sensing electrode.

In an embodiment of the invention, the driving electrodes and the sensing electrodes are independent of each other.

In one embodiment of the present invention, the sensing electrodes are independent of each other.

In an embodiment of the invention, the device further includes a metal bridge disposed on the first dielectric layer, and the metal bridge is connected to the driving trace.

Another embodiment of the invention provides a touch display device including a touch panel. The touch panel comprises metal wires, an active area and an integrated circuit. The metal traces include drive traces and sense traces. The active area comprises a sensor which is connected with a driving wire and a sensing wire. The driving wires are connected with the integrated circuit through holes in the dielectric layer, and the driving wires and the sensing wires are arranged below the sensors in the action area.

According to the touch display device provided by the embodiment of the invention, the driving wires and the sensing wires are connected with the integrated circuit through the through holes in the dielectric layer, so that the effects of lightness, thinness and narrow frame of the touch display device are achieved.

Drawings

FIG. 1 is a schematic circuit diagram of a conventional touch panel;

FIG. 2 is a schematic circuit diagram of a touch panel according to an embodiment of the invention; and

fig. 3 is a schematic cross-sectional view of a touch panel according to an embodiment of the invention.

Detailed Description

Referring to fig. 2 and 3, in order to achieve a narrow frame and a light and thin touch display device, an embodiment of the invention provides a touch panel 100. The touch panel 100 includes a driving trace 101, a sensing trace 102, an active region 103 and an integrated circuit 104. Both the driving trace 101 and the sensing trace 102 are metal traces. The active area 103 includes a sensor 105, and the sensor 105 coupled to the drive trace 101 and the sensor 105 coupled to the sense trace 102 are not coupled to each other. The sensor 105 connects the drive trace 101 and the sense trace 102. The driving traces 101 and the sensing traces 102 are disposed under the sensor 105 in the active region 103, the driving traces 101 and the sensing traces 102 are connected to the integrated circuit 104 and the associated metal electrodes 110 through the through holes 108 in the dielectric layer 112, and the number of the driving traces 101 is greater than that of the sensing traces 102.

The dielectric layer 112 includes a first dielectric layer 106 and a second dielectric layer 107, and the driving trace 101, the sensing trace 102 and the metal bridge (not shown) are disposed on the first dielectric layer 106 by a photolithography process. A second dielectric layer 107 is then formed, and a via 108 is formed in the second dielectric layer 107, followed by a metal layer. The metal layer on the second dielectric layer 107 is formed into the metal mesh sensor 105 and the metal electrode 110 by a photolithography process. And the metal electrode 110 is electrically connected to the driving trace 101, the sensing trace 102 and the integrated circuit 104 under the metal mesh sensor 105 of the active region 103 through the via 108. The metal electrodes 110 include driving electrodes and sensing electrodes. The driving trace 101 and the sensing trace 102 need to avoid the pixel opening of the touch display device, and the driving trace 101 and the sensing trace 102 are disposed below the metal mesh sensor 105. Finally, the driving trace 101 is connected to the driving electrode, the metal bridge is connected to the driving trace 101, and the sensing trace 102 is connected to the sensing electrode. In addition, the driving electrodes and the sensing electrodes are independent from each other, and the adjacent sensing electrodes are also independent from each other.

Another embodiment of the invention provides a touch display device including the touch panel. The driving wires and the sensing wires are connected with the integrated circuit through the through holes in the dielectric layer, so that the number of the metal wires can be reduced, the manufacturing process can be simplified, and meanwhile, the production cost and the packaging difficulty can be reduced. Because extra driving wires and sensing wires are not needed, the width of the frame of the touch display device can be less than 50 micrometers, so that the effects of light weight and thinness and narrow frame are achieved, meanwhile, the touch display device can also keep higher light-emitting rate, and more parasitic capacitance can be avoided.

While the invention has been described in conjunction with specific embodiments thereof, it is to be understood that many alternatives, modifications, and variations will be apparent to those skilled in the art. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the scope of the included claims.

Claims

1. A touch panel, comprising:

the metal routing comprises a driving routing and an induction routing;

an active area comprising a sensor, the sensor connecting the drive trace and the sense trace;

the integrated circuit comprises a driving wire and a sensing wire, wherein the driving wire and the sensing wire are connected with the integrated circuit through a through hole in a dielectric layer, the dielectric layer comprises a first dielectric layer and a second dielectric layer, and the driving wire and the sensing wire are arranged on the first dielectric layer and between the second dielectric layer; and

a metal bridge, wherein the metal bridge is disposed on the first dielectric layer, and the metal bridge connects the driving trace.

2. The touch panel of claim 1, wherein the driving traces and the sensing traces are disposed under the sensor of the active area.

3. The touch panel of claim 1, wherein the sensors coupled to the driving traces and the sensors coupled to the sensing traces are not coupled to each other.

4. The touch panel of claim 1, wherein the number of the driving traces is greater than the number of the sensing traces.

5. The touch panel of claim 1, wherein the driving traces are connected to driving electrodes and the sensing traces are connected to sensing electrodes.

6. The touch panel of claim 5, wherein the driving electrodes and the sensing electrodes are independent of each other.

7. The touch panel of claim 5, wherein the sensing electrodes are independent of each other.

8. A touch display device comprises a touch panel;

the touch panel includes:

the metal routing comprises a driving routing and an induction routing;

the integrated circuit is connected with the driving wire and the sensing wire through holes in a dielectric layer, the dielectric layer comprises a first dielectric layer and a second dielectric layer, and the driving wire and the sensing wire are arranged on the first dielectric layer and between the second dielectric layer; and

a metal bridge, wherein the metal bridge is disposed on the first dielectric layer, and the metal bridge connects the driving trace;

wherein the drive trace and the sense trace are disposed below the sensor of the active region.