CN104461164A - Touch display panel and touch display device - Google Patents

Abstract

The invention discloses a touch display panel and a touch display device. The touch display panel includes: an array substrate and a color filter substrate, wherein the array substrate includes a first substrate, and the first substrate faces away from the color filter substrate. The first electrode extending along the first direction is formed on the surface of the second substrate, and the color filter substrate includes: a second substrate, and the second electrode extending along the second direction is formed on the surface of the second substrate facing the array substrate. One of the first electrode and the second electrode is a touch scanning electrode, and the other is a touch sensing electrode. According to the technical solution of the present invention, by arranging the first electrode on the surface of the first substrate facing away from the color filter substrate, the natural light transmitted to the first electrode will be greatly reduced at this time, and correspondingly, the The natural light reflected by the specular surface is also greatly reduced, so it is difficult for the human eye to form an image of the first electrode, that is, the human eye cannot observe the first electrode in the touch display panel, thereby achieving the purpose of "shadow elimination".

Description

Touch display panel and touch display device

technical field

The present invention relates to the field of display technology, in particular to a touch display panel and a touch display device.

Background technique

At present, the integration of touch module and display module is the trend of future industry development. It has the advantages of intuitive display, simple and fast operation, good display effect, simple processing technology and good display effect. It is widely used in mobile phones and tablets. Computers, navigators and other consumer electronics products.

FIG. 1 is a schematic cross-sectional view of a touch display panel in the prior art. As shown in FIG. 1, the touch display panel includes: an array substrate 1 and a color filter substrate 2 arranged oppositely. A first electrode 3 extending along the first direction is formed on the surface of the substrate 2 facing away from the array substrate 1, and a second electrode 4 extending along the second direction is formed on the surface of the color filter substrate 2 facing the array substrate 1, One of the first electrode 3 and the second electrode 4 is a touch scanning electrode, and the other is a touch sensing electrode.

In the touch stage, the first electrode 3 and the second electrode 4 form a mutual capacitance at the overlapping position. When the human finger touches the panel, the mutual capacitance at the corresponding overlapping position will change. At this time, the touch The detection unit in the display panel detects the area where the mutual capacitance transmission changes, so as to determine the position of the touch point.

However, in actual use, since a large amount of natural light will be transmitted to the first electrode and emit on the surface of the first electrode, an image of the first electrode will be formed in the human eye, that is, the human eye can observe the touch display panel The first electrode in the battery further degrades the user's sense of experience.

Contents of the invention

The present invention provides a touch display panel and a touch display device, which are used to solve the technical problem that the image of electrodes in the touch display panel is touched by the user when using the touch display panel, which causes the user's sense of experience to decrease.

In order to achieve the above object, the present invention provides a touch display panel, comprising: an array substrate and a color filter substrate arranged opposite to each other;

The array substrate includes: a first substrate, at least one first electrode extending along a first direction is formed on the surface of the first substrate facing away from the color filter substrate;

The color filter substrate includes: a second substrate, at least one second electrode extending along a second direction is formed on the surface of the second substrate facing the array substrate;

One of the first electrode and the second electrode is a touch scanning electrode, and the other is a touch sensing electrode.

Optionally, the array substrate further includes: a first polarizer;

The first electrode is located between the first substrate and the first polarizer;

Alternatively, the first polarizer is located between the first substrate and the first electrode.

Optionally, the array substrate further includes: gate lines and data lines located on the surface of the first substrate facing the color filter substrate, the gate lines and the data lines define pixel units;

The projection of the first electrode on the first substrate and the projection of the second electrode on the first substrate form an overlapping area, and the projection of the pixel unit on the first substrate is located at outside the overlap region.

Optionally, the first electrode is a strip electrode or a mesh electrode.

Optionally, when the first electrodes are strip electrodes, the first electrodes are arranged corresponding to the gate lines or data lines.

Optionally, when the first electrode is a mesh electrode, the mesh of the first electrode is set corresponding to the pixel unit.

Optionally, the color filter substrate further includes: a filter pattern and a black matrix pattern located on the surface of the second substrate facing the array substrate;

The black matrix pattern is located between the filter patterns.

Optionally, the black matrix pattern includes: at least one black matrix sub-pattern extending along the second direction, and the black matrix sub-pattern serves as the second electrode.

Optionally, the color filter substrate further includes: a common electrode, the common electrode includes: at least one common sub-electrode extending along the second direction, and the common sub-electrode serves as the second electrode.

To achieve the above object, the present invention further provides a touch display device, including: a touch display panel, and the touch display panel adopts the above touch display panel.

The present invention has the following beneficial effects:

The present invention provides a touch display panel and a touch display device. The touch display panel includes: an array substrate and a color filter substrate arranged opposite to each other, wherein the array substrate includes: a first substrate, the first substrate faces away from At least one first electrode extending along the first direction is formed on the surface of the color filter substrate. The color filter substrate includes: a second substrate, and the surface of the second substrate facing the array substrate is formed with electrodes extending along the second direction. At least one second electrode, one of the first electrode and the second electrode is a touch scanning electrode, and the other is a touch sensing electrode. According to the technical solution of the present invention, by arranging the first electrode on the surface of the first substrate facing away from the color filter substrate, the natural light transmitted to the first electrode will be greatly reduced at this time, and correspondingly, the The natural light reflected by the specular surface is also greatly reduced, so it is difficult for the human eye to form an image of the first electrode, that is, the human eye cannot observe the first electrode in the touch display panel, thereby achieving the purpose of "shadow elimination".

Description of drawings

1 is a schematic cross-sectional view of a touch display panel in the prior art;

2 is a schematic cross-sectional view of a touch display panel provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a first electrode in an embodiment of the present invention;

Fig. 4 is another schematic structural diagram of the first electrode in the embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a black matrix pattern in an embodiment of the present invention;

FIG. 6 is another structural schematic diagram of a black matrix pattern in an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a color filter substrate provided in an embodiment of the present invention.

Detailed ways

In order for those skilled in the art to better understand the technical solution of the present invention, the touch display panel and the touch display device provided by the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 2 is a schematic cross-sectional view of a touch display panel provided by an embodiment of the present invention. As shown in Fig. 2, the touch display panel includes: an array substrate 1 and a color filter substrate 2 arranged oppositely, and the array substrate 1 includes: A substrate 5, at least one first electrode 3 extending along the first direction is formed on the surface of the first substrate 5 facing away from the color filter substrate 2 (in FIG. below), the color filter substrate 2 includes: a second substrate 6, and at least one second electrode 4 extending along the second direction is formed on the surface of the second substrate 6 facing the array substrate 1 (the second electrode 4 in FIG. 2 4 under the second substrate 6), one of the first electrode 3 and the second electrode 4 is a touch scanning electrode, and the other is a touch sensing electrode.

It should be noted that, in this embodiment, the first direction is a horizontal direction and the second direction is a vertical direction as an example for description.

Compared with the prior art, in the technical solution of this embodiment, the first electrode 3 is arranged on the surface of the first substrate 5 facing away from the color filter substrate 2, at this time, the natural light transmitted to the first electrode 3 will be greatly reduced. Correspondingly, the specular reflection of natural light on the surface of the first electrode 3 is also greatly reduced. At this time, it is difficult for the human eye to form an image of the first electrode 3, that is, the human eye cannot observe the first electrode in the touch display panel. 3. Therefore, the technical solution of the present invention achieves the purpose of "shadow elimination" while ensuring the original touch function.

Optionally, the array substrate 1 further includes: a first polarizer 7 , and the first electrode 3 is located between the first substrate 5 and the first polarizer 7 . In this embodiment, by arranging the first electrode 3 between the first substrate 5 and the first polarizer 7, the first polarizer 7 can be effectively used to protect the first electrode 3, and the first electrode 3 can be avoided in the subsequent preparation process of the panel. One electrode 3 is scratched, so that the yield rate of the production line can be improved.

It should be noted that the solution that the first electrode 3 is disposed between the first substrate 5 and the first polarizer 7 is a preferred implementation of this embodiment, and this does not limit the technical solution of this application. In this embodiment, the first polarizer 7 can also be arranged between the first substrate 5 and the first electrode 3 , and no corresponding drawing is given for this case.

Optionally, the array substrate 1 further includes: gate lines and data lines located on the surface of the first substrate 5 facing the color filter substrate 2, the gate lines and data lines define pixel units, and the pixel units include: thin film transistors and pixel The electrode, the pixel unit is used for pixel display, the projection of the first electrode 3 on the first substrate 5 and the projection of the second electrode 4 on the first substrate 5 form an overlapping area, and the pixel unit is formed on the first substrate The projection on 5 lies outside the overlap region.

It should be noted that the arrangement of gate lines, data lines, thin film transistors and pixel electrodes in this embodiment is a conventional arrangement in the field, and will not be described in detail here.

Taking the first electrodes 3 as touch scanning electrodes as an example, the working process of the touch display panel provided by this embodiment will be described below. In this embodiment, the working process of the touch display panel includes: a display stage and a touch stage. In the display stage, the gate line controls the thin film transistor to turn on, and the data line writes the data voltage to the pixel electrode, thereby realizing the screen display . In the touch phase, neither the gate line nor the data line is loaded with a signal, and the storage capacitor charges the pixel electrode to maintain the data voltage in the pixel electrode, thereby maintaining the screen display. At this time, the first electrode 3 starts touch scanning, And a mutual capacitance is formed in the overlapping area of the first electrode 3 and the second electrode 4 . If there is a pixel electrode in the overlapping area of the first electrode 3 and the second electrode 4, and the pixel electrode is loaded with a data voltage, then the pixel electrode will interfere with the interaction between the first electrode 3 and the second electrode 4. Capacitance is affected. At the same time, since the data voltage of the pixel electrode is different in each cycle (including a display phase and a touch phase), the influence of the pixel electrode on the mutual capacitance at the corresponding position in each cycle is also different. At this time, the detection unit The change of the mutual capacitance between the first electrode 3 and the second electrode 4 cannot be detected, so the position of the touch point cannot be determined. Therefore, in order to avoid the influence of the pixel electrode in the pixel unit on the mutual capacitance between the first electrode 3 and the second electrode 4 , the pixel unit is arranged outside the overlapping area in this embodiment.

FIG. 3 is a schematic structural diagram of the first electrode in the embodiment of the present invention. As shown in FIG. 3, as an alternative to the array substrate 1 in this embodiment, the first electrode 3 is a strip electrode. The strip electrodes extend along the first direction (horizontal direction X). Further, the strip electrodes are arranged correspondingly to the grid lines. In this embodiment, when the first electrode 3 is set as a strip electrode and the first electrode 3 is set corresponding to the gate line, it can be guaranteed that the overlapping area between the first electrode 3 and the second electrode 4 will not There is an overlap with the pixel unit.

It should be noted that when the first direction is the vertical direction and the first electrode 3 is a strip electrode, the first electrode 3 can be arranged corresponding to the data line, and at this time, the first electrode 3 and the second electrode 4 can also be realized. The overlapping area between must not overlap with the pixel units, and no corresponding drawings are given in this case.

Fig. 4 is another structural schematic diagram of the first electrode in the embodiment of the present invention. As shown in Fig. 4, as another optional solution of the array substrate 1 in the present embodiment, the first electrode 3 is a mesh electrode, The mesh electrodes extend along a first direction (horizontal direction X). Further, the meshes 8 of the mesh electrode are arranged corresponding to the pixel units. In this embodiment, when the first electrode 3 is set as a mesh electrode and the mesh 8 of the first electrode 3 is set corresponding to the pixel electrode, the intersection between the first electrode 3 and the second electrode 4 can also be ensured at this time. The overlapping area must not overlap with the pixel unit.

It should be noted that the fact that one grid-like first electrode 3 corresponds to two rows of pixel units in FIG. 4 is only an example, and does not limit the technical solution of the present application.

As an alternative to the color filter substrate 2 in this embodiment, the color filter substrate 2 further includes: a filter pattern and a black matrix pattern located on the surface of the second substrate 6 facing the array substrate 1, the black matrix The graphics are located between the filter graphics. Further, the black matrix graphics include: at least one black matrix sub-graphic extending along the second direction, and the black matrix sub-graphic serves as the second electrode 4 . In this solution, the material of the black matrix pattern must be a conductive and light-shielding material, such as a metal material.

The structure of the black matrix pattern in this embodiment will be described in detail below with reference to the accompanying drawings. Fig. 5 is a kind of structural representation of the black matrix pattern in the embodiment of the present invention, as shown in Fig. 5, this black matrix pattern comprises several black matrix sub-patterns 9a extending along the second direction (vertical direction Y), corresponding Two adjacent black matrix sub-patterns 9 a are insulated from each other, and these black matrix sub-patterns 9 a can be used as the second electrodes 4 in the touch stage. It should be noted that the black matrix sub-pattern in the black matrix pattern in the present invention is not limited to the structure shown in FIG. 5 , and the black matrix sub-pattern in the present invention may also have other structures. For example, FIG. 6 is another schematic structural view of a black matrix pattern 9 in an embodiment of the present invention. As shown in FIG. 6, the black matrix pattern 9 includes a striped black matrix extending along the second direction (vertical direction Y) The sub-pattern 9b and the sub-pattern 9c of the black matrix in the shape of a grid, these sub-patterns of the black matrix in the form of stripes 9b and the sub-pattern of the black matrix in the form of a grid can all be used as the second electrode 4 .

As an alternative to the color filter substrate 2 in this embodiment, FIG. 7 is a schematic cross-sectional view of the color filter substrate 2 provided in the embodiment of the present invention. The color filter substrate 2 not only includes the filter pattern R/G/ B and the black matrix pattern 9 also include a common electrode 10, the common electrode 10 is located above the filter pattern R/G/B, the common electrode 10 includes: at least one common sub-electrode 10a extending along the second direction, adjacent The two common sub-electrodes 10a are insulated from each other, and these common sub-electrodes 10 can be used as the second electrodes 4 during the touch control phase. It should be noted that, in the color filter substrate shown in FIG. 7 , the material of the black matrix pattern 9 is insulating material.

In the above technical solution, the black matrix sub-pattern 9a/9b/9c in the black matrix pattern 9 or the common sub-electrode 10a in the common electrode 10 is used as the second electrode 4 in the touch stage by means of "time sharing", Therefore, there is no need to separately arrange the second electrode 4 in the touch display panel, so that the overall thickness of the panel can be effectively reduced, and the production cost of the panel can also be reduced.

It should be noted that in this embodiment, the first electrode 3 in FIG. 3 or FIG. 4 can be combined with the second electrode 4 in FIG. 5 , FIG. 6 or FIG. 7 to realize the touch function. For these combinations Solution This embodiment will not be described in detail.

In addition, the above implementation of multiplexing black matrix patterns or common electrodes as the second electrodes is a preferred implementation of this embodiment, which does not limit the technical solution of the present invention. In the present invention, the second electrode can also be separately arranged on the color filter substrate, for example, the second electrode can be arranged between the second substrate and the black matrix pattern (made of insulating material). It should be further explained that, when the second electrode arranged separately is adjacent to the common electrode, an insulating layer needs to be arranged between the second electrode and the common electrode. As for the above-mentioned situation of separately disposing the second electrode on the color filter substrate, no detailed description will be given here.

An embodiment of the present invention provides a touch display panel. The touch display panel includes: an array substrate and a color filter substrate disposed opposite to each other, wherein the array substrate includes a first substrate, and the first substrate faces away from the color filter substrate. At least one first electrode extending along the first direction is formed on the surface of the second substrate, and the color filter substrate includes: a second substrate, and at least one first electrode extending along the second direction is formed on the surface of the second substrate facing the array substrate. Two electrodes, one of the first electrode and the second electrode is a touch scanning electrode, and the other is a touch sensing electrode. In the technical solution of this embodiment, the first electrode is arranged on the surface of the first substrate facing away from the color filter substrate. At this time, the natural light transmitted to the first electrode will be greatly reduced. Correspondingly, on the surface of the first electrode The natural light that produces specular reflection is also greatly reduced, so it is difficult for the human eye to form an image of the first electrode, that is, the human eye cannot observe the first electrode in the touch display panel, thereby achieving the purpose of "shadow elimination".

The embodiment of the present invention also provides a touch display device, the touch display device includes: a touch display panel, the touch display panel adopts the touch display panel in the above embodiment, and details can be found in the above embodiment description, which will not be repeated here.

It can be understood that, the above embodiments are only exemplary embodiments adopted for illustrating the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (10)

1. A touch display panel, characterized in that it comprises: an array substrate and a color filter substrate arranged oppositely; The array substrate includes: a first substrate, at least one first electrode extending along a first direction is formed on the surface of the first substrate facing away from the color filter substrate; The color filter substrate includes: a second substrate, at least one second electrode extending along a second direction is formed on the surface of the second substrate facing the array substrate; One of the first electrode and the second electrode is a touch scanning electrode, and the other is a touch sensing electrode. 2. The touch display panel according to claim 1, wherein the array substrate further comprises: a first polarizer; The first electrode is located between the first substrate and the first polarizer; Alternatively, the first polarizer is located between the first substrate and the first electrode. 3. The touch display panel according to claim 1, wherein the array substrate further comprises: gate lines and data lines located on the surface of the first substrate facing the color filter substrate, the The gate lines and the data lines define pixel units; The projection of the first electrode on the first substrate and the projection of the second electrode on the first substrate form an overlapping area, and the projection of the pixel unit on the first substrate is located at outside the overlap region. 4. The touch display panel according to claim 3, wherein the first electrodes are strip electrodes or mesh electrodes. 5 . The touch display panel according to claim 4 , wherein when the first electrodes are strip electrodes, the first electrodes are arranged correspondingly to the gate lines or the data lines. 6 . The touch display panel according to claim 4 , wherein when the first electrode is a mesh electrode, the mesh of the first electrode is arranged corresponding to the pixel unit. 7. The touch display panel according to any one of claims 3-6, wherein the color filter substrate further comprises: a light filter located on the surface of the second substrate facing the array substrate A sheet pattern and a black matrix pattern, the black matrix pattern is located between the filter patterns. 8. The touch display panel according to claim 7, wherein the black matrix pattern comprises: at least one black matrix sub-pattern extending along the second direction, and the black matrix sub-pattern serves as the second electrode . 9. The touch display panel according to claim 7, wherein the color filter substrate further comprises: a common electrode, the common electrode comprises: at least one common sub-electrode extending along the second direction, the common The sub-electrode is used as the second electrode. 10. A touch display device, comprising: the touch display panel according to any one of claims 1-9.