CN102830881B - Embedded touch display panel - Google Patents

Abstract

The invention relates to an embedded touch display panel, which comprises an array substrate, an opposite substrate, a capacitive touch detection array and a first protection pattern. The array substrate is provided with a display area and a peripheral area surrounding the display area. The opposite substrate is arranged opposite to the array substrate, wherein the opposite substrate is provided with an inner surface facing the array substrate, the opposite substrate is provided with a detection area, and a peripheral area surrounds the detection area. The capacitance type touch detection array is arranged on the inner surface of the opposite substrate and is positioned in the detection area. The first protection pattern is arranged on the inner surface of the opposite substrate and located in the peripheral area of the opposite substrate, wherein the first protection pattern is electrically separated from the capacitive touch detection array.

Description

Embedded touch display panel

technical field

The present invention relates to an in-cell touch display panel, in particular to an in-cell touch display panel with a protective pattern disposed on an opposite substrate.

Background technique

Due to the characteristic of human-computer interaction, the touch panel has gradually replaced the keyboard and is widely used in the input interface of the electronic device. In recent years, as the application of consumer electronics products has become more and more extensive, there are more and more application products that combine touch panels and displays to form touch display devices, including mobile phones, satellite navigation system (GPS navigator system), tablet computer (tablet PC) and notebook computer (laptop PC), etc.

Nowadays, the development of touch panel technology is very diverse. Among them, capacitive touch panel has become the most popular choice for mid-to-high-end consumer electronics products due to its high accuracy, multi-touch, high durability and high touch resolution. mainstream touch technology. In addition, the integrated touch display panel can be divided into two types according to the degree of integration of the touch element and the display panel. The type of touch elements made on the outer surface of the display panel (generally called On-cell touch display panel), which has a low degree of integration and a large thickness; touch elements are directly made on the inside of the display panel The type of surface (generally called an in-cell touch display panel) has a high degree of integration and a small thickness. Since the touch elements of the in-cell touch display panel are directly fabricated on the inner surface of the display panel, they may be damaged by electrostatic damage due to unpredictable factors during the production process or after completion. This is an in-cell touch display panel Problems to be solved in design.

Contents of the invention

One of the objectives of the present invention is to provide an in-cell touch display panel to improve the electrostatic protection capability.

A preferred embodiment of the present invention provides an in-cell touch display panel, which includes an array substrate, a pair of facing substrates, a capacitive touch detection array and a first protection pattern. The array substrate has a display area, and a peripheral area surrounds the display area. The opposite substrate is arranged opposite to the array substrate, wherein the opposite substrate has an inner surface facing the array substrate, and the opposite substrate has a detection area, and a peripheral area surrounds the detection area. The capacitive touch detection array is disposed on the inner surface of the opposite substrate and located in the detection area. The first protection pattern is disposed on the inner surface of the opposite substrate and located in the peripheral region of the opposite substrate, wherein the first protection pattern is electrically separated from the capacitive touch detection array.

In the above-mentioned in-cell touch display panel, wherein the first protection pattern substantially surrounds the detection area of the opposite substrate.

In the above-mentioned in-cell touch display panel, wherein the first protection pattern has a compensation bias.

The above-mentioned in-cell touch display panel, wherein the array substrate has an inner surface facing the opposite substrate, and the in-cell touch display panel further includes a second protective pattern arranged on the inner surface of the peripheral area of the array substrate on, and the second protection pattern is electrically connected to the first protection pattern.

In the above-mentioned in-cell touch display panel, the second protection pattern is located on at least one side of the display area of the array substrate.

In the above-mentioned in-cell touch display panel, wherein the second protection pattern substantially surrounds the display area of the array substrate.

The above-mentioned in-cell touch display panel further includes a connection structure disposed between the array substrate and the opposite substrate, and the first protection pattern and the second protection pattern are electrically connected through the connection structure.

In the above-mentioned in-cell touch display panel, the connection structure includes a conductive sealant.

In the above-mentioned in-cell touch display panel, the connection structure includes a conductive bump.

In the above-mentioned in-cell touch display panel, wherein the connection structure includes a spacer and a conductive layer, the spacer is arranged between the array substrate and the opposite substrate, the conductive layer is arranged on the surface of the spacer, and the first protection pattern It is electrically connected with the second protection pattern via the conductive layer.

In the above-mentioned in-cell touch display panel, wherein, the first protection pattern and the second protection pattern have a compensation bias, and the in-cell touch display panel further includes a touch circuit board, which is arranged on the array substrate and communicates with The second protection pattern is electrically connected to provide compensation bias voltage to the first protection pattern and the second protection pattern.

The above-mentioned in-cell touch display panel further includes a display medium layer disposed between the array substrate and the opposite substrate.

The inner surface of the facing substrate of the in-cell touch display panel of the present invention is provided with a protective pattern, which can provide electrostatic protection, so as to prevent the in-cell touch display panel from being damaged by static electricity due to unpredictable factors.

Description of drawings

1 to 3 show schematic diagrams of an in-cell touch display panel according to a first preferred embodiment of the present invention;

FIG. 4 shows a schematic diagram of an in-cell touch display panel in a variant embodiment of the first preferred embodiment of the present invention;

5 to 7 are schematic diagrams of an in-cell touch display panel according to a second preferred embodiment of the present invention.

FIG. 8 shows a schematic diagram of an array substrate of an in-cell touch display panel according to a variant embodiment of the second preferred embodiment of the present invention.

reference sign

10: Embedded touch display panel 20: Array substrate

20D: Display area 20P: Peripheral area

20A: Inner surface 21: First wire

22: The second wire 23: The third wire

24: Connection structure 26: Touch circuit board

28: Display array 211: Metal wire

212: transparent wire 30: opposite substrate

30P: Surrounding area 30S: Detection area

30A: Inner surface 32: Capacitive touch detection array

33: wire 34: first protection pattern

40: Liquid crystal layer 10’: Embedded touch display panel

35: Transparent wire 241: Interstitial object

242: Conductive layer 50: Embedded touch display panel

29: Second protection pattern 291: Metal protection pattern

292: Transparent protective pattern 27: Display circuit board

32P: detection pad

Detailed ways

In order to enable those skilled in the technical field of the present invention to further understand the present invention, the preferred embodiments of the present invention are listed below, together with the attached drawings, to describe the composition and the desired effect of the present invention in detail.

Please refer to Figure 1 to Figure 3. 1 to 3 show schematic diagrams of the in-cell touch display panel according to the first preferred embodiment of the present invention, wherein FIG. 1 shows a cross-sectional schematic view of the in-cell touch display panel, and FIG. A schematic diagram of the opposite substrate of the touch display panel, and FIG. 3 shows a schematic diagram of the array substrate of the in-cell touch display panel. As shown in FIGS. 1 to 3 , the in-cell touch display panel 10 of this embodiment includes an array substrate 20 , a pair of facing substrates 30 , a display medium layer 40 , a capacitive touch detection array 32 and a first A protection pattern (or called a first electrostatic protection pattern) 34 . The array substrate 20 has a display area 20D, and a peripheral area 20P surrounds the display area 20D. A display array 28 is disposed in the display area 20D of the array substrate 20 , which may include elements such as gate lines, data lines, pixel electrodes, thin film transistors, and storage capacitors (not shown). The opposite substrate 30 is disposed opposite to the array substrate 20 , and the opposite substrate 30 has an inner surface 30A facing the array substrate 20 , and the array substrate 20 has an inner surface 20A facing the opposite substrate 30 . The opposite substrate 30 has a detection area 30S, and a peripheral area 30P surrounds the detection area 30S. Color filters, black matrix layers, common electrodes, photoresist spacers, alignment bumps and other elements (not shown) may be disposed on the opposite substrate 30 . The capacitive touch detection array 32 is disposed on the inner surface 30A of the opposite substrate 30 and located in the detection area 30S. The in-cell touch display panel 10 of this embodiment takes a touch liquid crystal display panel as an example, so the display medium layer 40 is a liquid crystal layer disposed between the array substrate 20 and the opposite substrate 30 . The in-cell touch display panel 10 is not limited to a touch liquid crystal display panel, and may also be other types of touch display panels, such as a touch organic light emitting diode display panel. In addition, the capacitive touch detection array 32 is a one-dimensional (one dimensional) touch detection array, but not limited thereto. For example, the capacitive touch detection array 32 can also be a two-dimensional (two-dimensional) touch-sensing array, and the two-dimensional touch-sensing array can be formed by a single-layer conductive pattern or a multi-layer conductive pattern. The capacitive touch detection array 32 includes a plurality of detection pads 32P and a plurality of trace lines 33, which are arranged on the inner surface 30A of the opposite substrate 30 and are respectively electrically connected to the corresponding detection pads 32P for transmission of detection received touch signal. The first protection pattern 34 is disposed on the inner surface 30A of the opposite substrate 30 and located in the peripheral region 30P, wherein the first protection pattern 34 is electrically separated from the capacitive touch detection array 32 . In this embodiment, the detection pads 32P of the capacitive touch detection array 32 and the first protection pattern 34 are preferably formed by the same patterned conductive layer, but not limited thereto.

The first protection pattern 34 may have a compensation bias or be grounded. Unpredictable elements are damaged by static electricity. In addition, in the present embodiment, the first protection pattern 34 substantially surrounds the detection area 30S of the opposite substrate 30 , but it is not limited thereto. For example, the first protection pattern 34 may also be disposed on one side, two sides or three sides of the detection area 30S of the opposite substrate 30 . In addition, the position, pattern and number of the first protection pattern 34 can be changed depending on the requirement of electrostatic protection capability or other considerations. The in-cell touch display panel 10 further includes a first wire 21 , a plurality of second wires 22 , a plurality of third wires 23 , at least one connection structure 24 , a touch circuit board 26 and a display circuit board 27 . The connection structure 24 is disposed between the array substrate 20 and the opposite substrate 30 . The first wire 21 is disposed on the peripheral area 20P of the array substrate 20 , wherein one end of the first wire 21 is electrically connected to the touch circuit board 26 , and the other end of the first wire 21 extends to the bottom of the connection structure 24 . On the other hand, the first protection pattern 34 disposed on the inner surface 30A of the opposite substrate 30 can be electrically connected to a transparent wire 35 extending above the connection structure 24, so that the bias compensation provided by the touch circuit board 26 The pressure can be transmitted to the first protection pattern 34 through the first wire 21 and the connection structure 24 in turn. The first protection pattern 34 is a conductive pattern, such as a metal pattern. In addition, the first protection pattern 34 can also directly extend above the connecting structure 24 to be electrically connected with the connecting structure 24 . The second wires 22 are disposed on the peripheral area 20P of the array substrate 20 , wherein one end of each second wire 22 is electrically connected to the touch circuit board 26 , and the other end extends to the bottom of the connection structure 24 . In addition, the connection structure 24 is also electrically connected to the wire 33 on the inner surface 30A of the opposite substrate 30, so that the touch signal detected by the capacitive touch detection array 32 can pass through the wire 33, the connection structure 24 and the second The wire 22 is transmitted to the touch circuit board 26 . The third wires 23 are arranged on the peripheral region 20P of the array substrate 20, wherein one end of each third wire 23 is electrically connected to the display array 28 (gate line or data line), and the other end is electrically connected to the display circuit board 27 , whereby the driving signal sent by the display circuit board 27 can be transmitted to the gate line or the data line through the third wire 23 . The material of the first wire 21 can be a conductive material such as metal or transparent conductive material, and it can be a single-layer structure or a multi-layer structure. For example, in this embodiment, the first wire 21 is composed of a metal wire 211 and a transparent wire 212, wherein the metal wire 211 can be connected to any of the gate lines or data lines of the display array 28, for example. One is made of the same metal pattern, and the transparent wire 212 can be made of the same transparent conductive pattern as the pixel electrode (not shown), for example. The transparent wire 212 may only overlap the metal wire 211 corresponding to the connection structure 24 , but does not have to be completely overlapped with the metal wire 211 . The second wire 22 and the third wire 23 may be formed of the same metal pattern as the first wire 21 , but not limited thereto.

In this embodiment, the connection structure 24 may include a conductive sealant, which has dual functions of adhering the array substrate 20 and the opposite substrate 30 and conducting electrical properties. For example, the conductive sealant can be a colloid with conductive particles (such as gold balls), which can only conduct electricity in the direction perpendicular to the array substrate 20 and the opposite substrate 30. Therefore, in this embodiment, the first wire 21. The conductive sealant partially overlaps the first protective pattern 34 in a direction perpendicular to the array substrate 20 and the opposite substrate 30, so that the compensation bias voltage provided by the touch circuit board 26 can be sequentially connected to the conductive wire 21 via the first wire 21. The sealant is transferred to the first protection pattern 34 . Similarly, the second wire 22, the conductive sealant, and the wire 33 partially overlap in a direction perpendicular to the array substrate 20 and the opposite substrate 30, so that the touch signals detected by the capacitive touch detection array 32 can pass through the The wire 33 , the connection structure 24 and the second wire 22 are transmitted to the touch circuit board 26 . The connection structure 24 is not limited to the conductive sealant. For example, the connection structure 24 may also be other structures with conductive properties, such as conductive bumps. In other variant embodiments, the compensation bias or grounding required by the first protection pattern 34 may not be provided by the touch circuit board 26 on the array substrate 20, but by another touch circuit board on the opposite substrate 30. (not shown) provided.

The in-cell touch display panel of the present invention is not limited to the above embodiments. The following will introduce the in-cell touch display panels of other preferred embodiments and variant embodiments of the present invention in sequence, and in order to facilitate the comparison of the differences between the embodiments and simplify the description, the same symbols are used in the following embodiments The same elements are marked, and the description is mainly focused on the differences of the embodiments, and the repetitive parts will not be repeated.

Please refer to Figure 4. FIG. 4 is a schematic diagram of an in-cell touch display panel according to a variant embodiment of the first preferred embodiment of the present invention. As shown in FIG. 4 , in this variant embodiment, the connection structure 24 of the in-cell touch display panel 10 ′ can be a conductive spacer, which includes a spacer 241 and a conductive layer 242, wherein the spacer 241 ( For example, a photoresist spacer) is arranged between the array substrate 20 and the opposite substrate 30, and can maintain the liquid crystal gap between the array substrate 20 and the opposite substrate 30, and the conductive layer 242 is arranged on the surface of the spacer 241, and is transparent The transparent wire 35 is electrically connected to the first protection pattern 34 , so that the first protection pattern 34 can be electrically connected to the first wire 21 on the array substrate 20 through the conductive layer 242 . The spacer 241 can be fabricated on the opposite substrate 30 , and the conductive layer 242 and the transparent wire 35 can be composed of the same transparent conductive pattern.

Please refer to Figure 5 to Figure 7. 5 to 7 show schematic diagrams of an in-cell touch display panel according to a second preferred embodiment of the present invention, wherein FIG. 5 shows a schematic cross-sectional view of an in-cell touch display panel, and FIG. 7 shows a schematic diagram of an array substrate of an in-cell touch display panel. As shown in Figures 5 to 7, different from the first preferred embodiment, the in-cell touch display panel 50 of this embodiment further includes a second protection pattern (or called a second electrostatic protection pattern) 29, which is set On the inner surface 20A of the peripheral region 20P of the array substrate 20 , the second protection pattern 29 is electrically connected to the first protection pattern 34 through the connection structure 24 . The second protection pattern 29 is located on at least one side of the display area 20D of the array substrate 20 , preferably, the second protection pattern 29 substantially surrounds the display area 20D of the array substrate 20 . The position, pattern and number of the second protection pattern 29 can be changed depending on the requirement of electrostatic protection capability or other considerations. In this embodiment, the material of the second protection pattern 29 can be a conductive material such as metal or transparent conductive material, and it can be a single-layer structure or a multi-layer structure. For example, in this embodiment, the second protection pattern 29 is composed of a metal protection pattern 291 and a transparent protection pattern 292, wherein the metal protection pattern 291 can be connected with the gate lines or data of the display array 28, for example. Any one of the lines is formed by the same metal pattern, and the transparent protection pattern 292 can be formed by the same transparent conductive pattern as the pixel electrode (not shown), for example. In addition, the transparent protection pattern 292 can only be superimposed on the metal protection pattern 291 corresponding to the connection structure 24 , but does not have to be completely superimposed on the metal protection pattern 291 . It can be seen from the above that the in-cell touch display panel 50 of this embodiment does not need to use the first wire 21 to electrically connect the touch circuit board 26 and the connection structure 24, but can directly use the second protection pattern 29 to electrically connect the touch panel. The circuit board 26 and the connection structure 24 . The second protection pattern 29 can further enhance the electrostatic protection capability of the in-cell touch display panel 50 to prevent the display array 28 from being damaged by static electricity due to unexpected factors. Since the second protection pattern 29 in this embodiment is electrically connected to the first protection pattern 34 on the opposite substrate 30 , the electrostatic protection capability for the capacitive touch detection array 32 can be further increased. It is worth noting that in this embodiment, the connection structure 24 can also be the conductive sealant or the conductive bump disclosed in the first preferred embodiment, or the conductive gap disclosed in the variant embodiment of the first preferred embodiment. objects, or other structures with conductive properties.

Please refer to Figure 8. FIG. 8 shows a schematic diagram of an array substrate of an in-cell touch display panel according to a variant embodiment of the second preferred embodiment of the present invention. As shown in FIG. 8 , in this variant embodiment, the second protection pattern 29 is located on one side of the display area 20D of the array substrate 20 instead of surrounding the display area 20D of the array substrate 20 .

To sum up, the inner surface of the facing substrate of the in-cell touch display panel of the present invention is provided with a protective pattern, which can provide electrostatic protection, so as to prevent the in-cell touch display panel from being destroyed by static electricity due to unexpected factors. damaged.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the patent scope of the present invention shall fall within the scope of the present invention.

Claims (11)

1. an In-cell touch display panel, is characterized in that, comprising:

Array basal plate, has a viewing area, and a surrounding zone is around this viewing area;

One subtend substrate, is oppositely arranged with this array base palte, and wherein this subtend substrate has an inside surface, and in the face of this array base palte, and this subtend substrate has a detection zone, and a surrounding zone is around this detection zone;

One capacitance touching control detection arrays, this inside surface being arranged at this subtend substrate is positioned at this detection zone; And

One first protection pattern, this inside surface being arranged at this subtend substrate is positioned at this surrounding zone of this subtend substrate, wherein this first protection pattern and this capacitance touching control detection arrays electrically isolated;

Wherein, this array base palte has an inside surface, and in the face of this subtend substrate, this In-cell touch display panel separately comprises one second protection pattern, be arranged on this inside surface of this surrounding zone of this array base palte, and this second protection pattern and this first protect pattern and be electrically connected.

2. In-cell touch display panel according to claim 1, is characterized in that, this first protection pattern is substantially around this detection zone of this subtend substrate.

3. In-cell touch display panel according to claim 1, is characterized in that, this first protection pattern has a compensation bias voltage.

4. In-cell touch display panel according to claim 1, is characterized in that, this second protection pattern is positioned at least side of this viewing area of this array base palte.

5. In-cell touch display panel according to claim 1, is characterized in that, this second protection pattern is substantially around this viewing area of this array base palte.

6. In-cell touch display panel according to claim 1, is characterized in that, separately comprises a syndeton, is arranged between this array base palte and this subtend substrate, and this first protection pattern and this second protect pattern and be electrically connected via this syndeton.

7. In-cell touch display panel according to claim 6, is characterized in that, this syndeton comprises a conductive pane glue.

8. In-cell touch display panel according to claim 6, is characterized in that, this syndeton comprises a conductive projection.

9. In-cell touch display panel according to claim 6, it is characterized in that, this syndeton comprises a separation material and a conductive layer, this separation material is arranged between this array base palte and this subtend substrate, this conductive layer is arranged at the surface of this separation material, and this first protection pattern and this second protect pattern and be electrically connected via this conductive layer.

10. In-cell touch display panel according to claim 1, it is characterized in that, this first protection pattern and this second protect pattern there is a compensation bias voltage, and In-cell touch display panel separately comprises a touch-control circuit plate, to be arranged on this array base palte and second to protect pattern with this and be electrically connected, second protecting pattern in order to provide this compensation bias voltage to this first protection pattern and this.

11. In-cell touch display panel according to claim 1, is characterized in that, separately comprise a display dielectric layer, are arranged between this array base palte and this subtend substrate.