CN112558821B

CN112558821B - Touch display panel and touch display device

Info

Publication number: CN112558821B
Application number: CN202011442200.4A
Authority: CN
Inventors: 叶时迁
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2023-06-02
Anticipated expiration: 2040-12-08
Also published as: CN112558821A

Abstract

The application provides a touch display panel and touch display device, touch display panel includes: a substrate base; the driving layer is arranged on the substrate base plate; the touch control layer is arranged on the driving layer; and the light-emitting layer is arranged on the touch control layer. According to the touch control display panel, the touch control layer is manufactured between the driving layer and the light emitting layer, damage to the light emitting material in the light emitting layer caused by manufacturing the touch control layer on the packaging layer can be avoided, so that the manufacturing yield of the touch control display panel is improved, meanwhile, the continuity of the manufacturing process is improved, and the productivity and the utilization rate of equipment are improved.

Description

Touch display panel and touch display device

Technical Field

The application relates to the technical field of display, in particular to a touch display panel and a touch display device.

Background

Touch technology is used as an important index of intelligence, and the application range is wider and wider. Touch technologies are rapidly developed and can be classified into piezoresistive type, optical type, capacitive type and the like according to the touch principle, wherein the capacitive type touch technologies are most widely applied through the development of multiple generations. Capacitive Touch technologies can be broadly divided into Add-On Touch (Add-Touch), on-cell Touch (On-cell Touch), and In-cell Touch (In-cell Touch).

In the conventional Active-matrix organic light Emitting Diode (AMOLED) products, touch modules are mostly fabricated on a packaging layer, i.e., embedded touch or embedded touch is adopted. For external embedded touch control and embedded touch control, the organic light-emitting device in the touch control display panel is sensitive to temperature and water vapor, so that the organic light-emitting material is easily corroded by water and oxygen. When the touch control layer is prepared on the substrate of the touch control display panel, the touch control layer is easy to be limited by factors such as environment and temperature, and the like, so that high requirements are put on the material of the touch control layer and the preparation process.

The organic light-emitting material in the AMOLED is easy to cause the failure of the organic light-emitting material after being corroded by water and oxygen, the display abnormality is caused, namely the service life, the efficiency and the like of an AMOLED product can be reduced, the process of manufacturing the touch module on the packaging layer is produced by adopting an exposure etching process, the process needs to be cured by adopting an Ultraviolet (UV) curing mode, and the organic light-emitting material in the organic light-emitting layer is easy to damage when the organic light-emitting material irradiates the OLED device due to the short UV wavelength and high energy, namely the deposition etching process of the touch layer on the packaging layer is easy to cause the damage of the organic light-emitting material.

Disclosure of Invention

The embodiment of the application provides a touch display panel and a touch display device, which are used for solving the problem that an etching process damages an organic light-emitting material in an organic light-emitting layer.

In one aspect, the present application provides a touch display panel, including:

a substrate base;

the driving layer is arranged on the substrate base plate;

the touch control layer is arranged on the driving layer;

the organic light-emitting layer is arranged on the touch control layer.

In one possible implementation manner of the present application, the touch display panel further includes:

the anode is arranged on the touch control layer;

a pixel defining layer disposed on the anode;

the organic light-emitting layer is arranged in the groove formed by the pixel definition layer;

and a cathode covering the organic light emitting layer.

In one possible implementation manner of the present application, the cathode and the touch layer are staggered in the orthographic projection direction of the substrate.

In one possible implementation manner of the present application, the touch layer is disposed within the pixel definition layer.

In one possible implementation manner of the application, the driving layer includes a semiconductor layer, a gate insulating layer, a gate electrode, an interlayer insulating layer and a source drain layer which are sequentially arranged.

In one possible implementation manner of the present application, the driving layer further includes:

and the flattening layer is covered on the source drain electrode layer.

In one possible implementation manner of the present application, the touch layer is provided with a plurality of touch electrodes, the touch electrodes are disposed at intervals with the organic light-emitting layer, and the orthographic projection of the organic light-emitting layer on the touch layer is located in the grid of the touch layer.

In one possible implementation manner of the present application, the touch layer further includes:

the touch screen comprises a substrate, a first touch electrode, an insulating layer and a second touch electrode, wherein the insulating layer is arranged between the first touch electrode and the second touch electrode, and the first touch electrode and the second touch electrode are arranged perpendicular to each other on the orthographic projection of the substrate.

In one possible implementation manner of the present application, the first touch electrode is one of a driving electrode or a sensing electrode, and the second touch electrode is the other one of the driving electrode or the sensing electrode.

On the other hand, the application also provides a touch display device, which is characterized by comprising the touch display panel.

According to the touch display panel and the touch display device, the touch layer is manufactured between the driving layer and the light-emitting layer, so that damage to the light-emitting material in the light-emitting layer caused by manufacturing the touch layer on the packaging layer can be avoided, the manufacturing yield of the touch display panel is improved, meanwhile, the manufacturing process continuity is improved, and the equipment productivity and the utilization rate are improved.

Drawings

Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an embodiment of a touch display panel provided in the present application.

Fig. 2 is a schematic structural diagram of another embodiment of a touch display panel provided in the present application.

Fig. 3 is a schematic structural diagram of another embodiment of a touch display panel provided in the present application.

Fig. 4 is a schematic structural diagram of a touch layer according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a touch electrode according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

Referring to fig. 1, the present application provides a touch display panel, which includes a substrate 10, a driving layer 11, a touch layer 12 and a light emitting layer 13.

A substrate base 10;

a driving layer 11 disposed on the substrate base plate 10, the driving layer 11 including a plurality of thin film transistors (Thin Film Transistor, TFT) disposed in an array;

the touch layer 12 is disposed on the driving layer 11, where the touch layer is used to implement a touch detection function of the touch display panel;

the light emitting layer 13 is disposed on the touch layer 12, wherein the light emitting layer may be an OLED light emitting layer, which includes a plurality of light emitting units for emitting different colors of light.

The touch display panel provided by the application can avoid damage to luminescent materials in the luminescent layer 13, especially organic luminescent materials, caused by manufacturing the touch layer 12 between the driving layer 11 and the luminescent layer 13 by adopting the prior art to manufacture the touch layer on the packaging layer, thereby improving the manufacturing yield of the touch display panel, improving the process continuity and improving the productivity and the utilization rate of equipment.

In addition, compared with the prior art, in order to protect the luminescent material from being corroded by water and oxygen, the mode of adopting the multi-layer packaging layers such as the inorganic packaging layer and the organic packaging layer is adopted, and the touch display panel provided by the embodiment of the application does not need to be manufactured with an additional film layer, namely, the manufacturing process for manufacturing the multi-layer packaging layer is avoided, and the method is more beneficial to saving the process flow and keeping the touch display panel lighter and thinner.

Further, in order to avoid the influence of the touch layer 12 on the light emitting of the light emitting layer 13, the orthographic projection pattern of the light emitting layer 13 on the touch layer 12 is located in the grid of the touch layer 12. That is, the light emitted from the light emitting layer 13 is emitted from the grid gaps of the touch layer 12, so that the structure of the touch layer 12 does not block the light.

In some embodiments, the light emitting layer 13 is formed of a light emitting device, which may be embodied as an organic electroluminescent diode or other kind of light emitting device. Specifically, as shown in fig. 2, the light emitting layer 13 includes: an anode 23, a pixel defining layer 24, an organic light emitting layer 25, and a cathode 26.

Wherein the anode 23 is disposed on the touch layer 12.

A pixel defining layer 24 is arranged on said anode 23. In particular, the pixel defining layer 24 has slots, and the slots are arranged corresponding to the anode 23 traces.

The organic light emitting layer 25 is disposed in the groove formed by the pixel defining layer 24. Each of the light emitting units in the light emitting layer 13 may employ the same organic light emitting layer 25 so that each of the light emitting units emits light of the same color, for example, white light. Light of a required color can be obtained by combining a light emitting unit with a color film, for example, white light and a red color film, and a red light emitting unit can be obtained; white light and a blue color film to obtain a blue light emitting unit; white light and green color film, a green light emitting unit is obtained. In addition, the organic light emitting layer may be configured to emit red light, green light, and blue light, respectively, so that the light emitting units may be a red light emitting unit, a green light emitting unit, and a blue light emitting unit, respectively, and no color film is required to assist in light emission.

The cathode 26 is covered on the organic light emitting layer 25. Specifically, the cathodes 26 and the touch layer 12 are staggered in the orthographic projection direction of the substrate 10, so as to ensure that the cathodes 26 interfere with signals that cannot reach the touch layer 12. In fabricating the cathode 26, the cathode 26 may be patterned using a fine metal mask.

In some embodiments, the driving layer 11 specifically includes a semiconductor layer 52, a gate insulating layer 56, a gate metal layer 53, an interlayer insulating layer 57, and a source drain layer, which are sequentially disposed.

Specifically, the semiconductor layer 52 is provided on one side of the substrate base plate 10; the semiconductor layer 52 has a source region and a drain region;

a gate insulating layer 56 overlies the substrate 10 and the semiconductor layer 52;

a gate metal layer 53 overlies the gate insulating layer 56;

the interlayer insulating layer 57 is covered on the gate metal layer 53

A source/drain layer having a source 58 and a drain 54, the source 58 and the drain 54 being respectively connected to the source and drain regions, and overlying the interlayer insulating layer 57;

wherein the anode 23 is correspondingly connected to the drain electrode 54 in the source-drain electrode layer.

In addition, the semiconductor layer 52 corresponding to the source region and the drain region has enhanced conductivity due to doping. Alternatively, the semiconductor layer 52 may employ amorphous silicon, polysilicon, a combination thereof, or the like; for example, it may be low temperature polysilicon (Low Temperature Poly Silicon, LTPS), oxide semiconductor material, low temperature poly oxide material (Low Temperature Polycrystalline Oxide, LTPO), or the like. The gate insulating layer 56 is made of silicon oxide or silicon nitride; the gate metal layer 53 is made of molybdenum, aluminum, copper or tellurium.

The source region and the drain region may be formed as conductive regions of the semiconductor layer 52 doped with n-type impurities or p-type impurities, and thus the source region and the drain region may be electrically connected as connection structures of the semiconductor layer 52. For example, the semiconductor layer 52 corresponding to the source and drain regions may directly serve as the source 58 or drain 54 of the corresponding transistor. Alternatively, the source electrode 58 may be made of a conductive material (e.g., a metal material) and the drain electrode 54 may be made of a conductive material (e.g., a metal material).

It is understood that other metal layers or insulating layers may also be included between the substrate base 10 and the semiconductor layer 52. For example, at least one buffer layer 51 is further included between the substrate 10 and the semiconductor layer 52, the buffer layer 51 is used to improve the resistance of the substrate 10 to oxygen, and the buffer layer 51 may be silicon oxide or silicon nitride, etc.

In some embodiments, the driving layer 11 further includes: planarizing layer 55. The planarization layer 55 covers the source electrode 58 and the drain electrode 54, and the material used for the planarization layer 55 is a photoresist material.

In some embodiments, as shown in fig. 2 and 3, the touch display panel further includes an encapsulation layer 27 and a cover plate 14. The encapsulation layer 27 covers the light emitting layer 13, and in particular, the encapsulation layer 27 covers the cathode 26. The cover plate 14 covers the encapsulation layer 27, and the cover plate 14 may protect the material under the cover plate 14, and the cover plate 14 may be a transparent cover plate 14, for example, a glass cover plate 14 or a plastic cover plate 14.

In some embodiments, the touch layer 12 is provided with a plurality of touch electrodes, the touch electrodes are spaced from the organic light emitting layer 25, and the orthographic projection of the organic light emitting layer 25 on the touch layer 12 is located in the grid of the touch layer 12.

Specifically, as shown in fig. 4, the touch layer 12 further includes a first touch electrode 31, an insulating layer 33, and a second touch electrode 32, and the insulating layer 33 is disposed between the first touch electrode 31 and the second touch electrode 32. As shown in fig. 5, the first touch electrode 31 and the second touch electrode 32 are disposed perpendicular to each other on the orthographic projection of the substrate 10. The first touch electrode 31 may be a metal mesh, the second touch electrode 32 may be a bridging metal, an insulating layer 33 is disposed between the two touch electrodes, and a via hole may be disposed on the insulating layer 33 to connect the metal mesh and the bridging metal, thereby forming a self-capacitance touch electrode.

In other embodiments, the first touch electrode 31 may be one of a driving electrode and a sensing electrode, the second touch electrode 32 may be the other one of the driving electrode and the sensing electrode, and the two electrodes may be separated by an insulating layer 33 to form a mutual capacitive touch electrode, and the specific structure will not be described herein.

In some embodiments, the touch layer 12 may also be disposed within the pixel defining layer 24, as shown in fig. 3, that is, the touch layer 12 and the pixel defining layer 24 are disposed on the same layer, and the specific structure of the touch layer 12 is as described above and will not be described herein. Since the pixel defining layer 24 is disposed in the light emitting layer 13, the organic light emitting layer 25 is disposed in the groove formed by the pixel defining layer 24, and the cathode layer is covered on the organic light emitting layer 25, damage to the organic light emitting material in the light emitting layer due to the touch layer being fabricated on the packaging layer can be avoided, so as to improve the manufacturing yield of the touch display panel.

On the other hand, the application also provides a touch display device, which comprises the touch display panel of the embodiment. The touch display device has the same beneficial effects as the touch display panel, and the invention is not repeated here.

The application of the touch display device in the embodiment of the application is not particularly limited, and the touch display device can be any product or component with a display function, such as a television, a notebook computer, a tablet computer, wearable display equipment, a mobile phone, vehicle-mounted display, navigation, an electronic book, a digital photo frame, an advertising lamp box and the like.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The touch display panel and the touch display device provided by the embodiments of the present application are described in detail, and specific examples are applied to illustrate the principles and embodiments of the present application, and the description of the above embodiments is only used to help understand the technical solution and core ideas of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A touch display panel, comprising:

a substrate base;

the driving layer is arranged on the substrate base plate;

the touch control layer is arranged on the driving layer;

a light emitting layer disposed on the driving layer, the light emitting layer including:

an anode disposed on the driving layer;

the pixel definition layer is arranged on the anode, and the touch control layer is arranged in the pixel definition layer;

a cathode covering the organic light emitting layer;

the cathode is a patterned cathode, and the cathode and the touch layer are staggered in the orthographic projection direction of the substrate.

2. The touch display panel according to claim 1, wherein the driving layer comprises a semiconductor layer, a gate insulating layer, a gate electrode, an interlayer insulating layer, and a source drain layer, which are sequentially disposed.

3. The touch display panel of claim 2, wherein the driving layer further comprises:

and the flattening layer is covered on the source drain electrode layer.

4. The touch display panel of claim 1, wherein the touch layer is provided with a plurality of touch electrodes, and the orthographic projection of the organic light emitting layer on the touch layer is positioned in a grid of the touch layer.

5. The touch display panel of any one of claims 1-4, wherein the touch layer further comprises:

6. The touch display panel of claim 5, wherein the first touch electrode is one of a driving electrode or a sensing electrode, and the second touch electrode is the other of the driving electrode or the sensing electrode.

7. A touch display device comprising the touch display panel according to any one of claims 1-6.