CN107240597B

CN107240597B - Display panel with touch function, OLED module and display

Info

Publication number: CN107240597B
Application number: CN201710386680.9A
Authority: CN
Inventors: 高静
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2017-05-26
Filing date: 2017-05-26
Publication date: 2021-09-07
Anticipated expiration: 2037-05-26
Also published as: CN107240597A

Abstract

The disclosure relates to a display panel with a touch function, an OLED module and a display. The display panel includes: the display panel is characterized by also comprising a thin film sealing layer with a touch functional layer; the touch control functional layer comprises an organic film layer and an inorganic packaging layer; wherein, the organic film layer is a transparent conductive film; the inorganic substance packaging layer is used for isolating the organic substance film layer from the outside. The scheme solves the problems of complex process, complex film structure and the like at present, simplifies the process of the process and improves the yield of the process; meanwhile, the matching structure of organic matters and inorganic matters is adopted, so that the problem of stress matching among multiple layers of inorganic matters is avoided, the bending characteristic of the display panel is improved, and the phenomenon of fracture in the bending process is avoided.

Description

Display panel with touch function, OLED module and display

Technical Field

The present disclosure relates to the field of electronic devices, and in particular, to a display panel, an OLED module, and a display having a touch function.

Background

Currently, the touch panels are generally classified into an out-cell (out-cell) touch panel and an in-cell/on-cell (in-cell/on-cell) touch panel according to the structural design of the display panel. The external display panel is formed by combining an independent touch panel and a common display panel, and the embedded display panel is formed by directly arranging a touch sensing assembly on the inner side or the outer side of a substrate in the display panel. Regardless of the type of display panel, the thickness of the substrate used in the conventional display panel is about 0.4 mm to 0.55 mm, and the requirement of the market for the thickness of the thin touch panel is gradually not satisfied.

Disclosure of Invention

The embodiment of the disclosure provides a display panel with a touch function, an OLED module and a display. The technical scheme is as follows:

according to a first aspect of the embodiments of the present disclosure, a display panel with a touch function is provided, which includes a substrate and a backplane light emitting layer, and the display panel further includes a thin film sealing layer with a touch function layer; the touch control functional layer comprises an organic film layer and an inorganic packaging layer;

wherein, the organic film layer is a transparent conductive film; the inorganic substance packaging layer is used for isolating the organic substance film layer from the outside.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the problems of complex process, complex film structure and the like at present are solved, the process of the process is simplified, and the yield of the process is improved; meanwhile, the matching structure of organic matters and inorganic matters is adopted, so that the problem of stress matching among multiple layers of inorganic matters is avoided, the bending characteristic of the display panel is improved, and the phenomenon of fracture in the bending process is avoided.

In one embodiment, the organic film layer includes:

the method comprises the steps of detecting capacitance values of the display panel, wherein the display panel comprises a plurality of emission sources for emitting signals, a plurality of receiving sources for receiving signals and a bridge arranged between the emission sources and the receiving sources, wherein the bridge is used for isolating the emission sources from the receiving sources.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the internal structure of the organic film layer is introduced, and a bridge is arranged between the receiving source and the emission source, so that the signal mistransmission between the receiving source and the emission source is prevented.

In one embodiment, a first pattern of conductive lines is disposed on the receiving source; the receiving source is provided with a second pattern wire.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: and signal transmission and reception are realized through the pattern wire.

In one embodiment, the pattern wire includes the first pattern wire and the second pattern wire, and is provided by:

forming a pattern wire in a printing mode;

forming a pattern wire in a photographing mode;

forming a pattern wire in a dry etching mode;

and forming a pattern wire in a wet etching mode.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: a method for arranging a plurality of (pattern) pattern conducting wires is introduced, and the pattern conducting wires can be manufactured according to different conditions.

In one embodiment, the inorganic encapsulation layers include a first inorganic encapsulation layer and a second inorganic encapsulation layer;

the first inorganic substance encapsulating layer is encapsulated on the organic substance film layer, and the second inorganic substance encapsulating layer is encapsulated under the organic substance film layer.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the function of the inorganic encapsulation layer is described.

In one embodiment, the structural order of the touch functional layer is:

the organic film layer and the first inorganic packaging layer are arranged in sequence from the substrate and the second inorganic packaging layer of the back plate luminescent layer.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the structure of the most preferable touch functional layer is introduced, which can simplify the process and prevent the panel from being broken due to the multi-layer.

In one embodiment, the inorganic encapsulation layer is made of at least one of nitride and oxide.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: materials for inorganic encapsulation layers are described.

In one embodiment, the display panel further includes: a polarizer disposed on the first inorganic encapsulation layer; and a cover film disposed on the polarizer.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: and (5) perfecting the whole display panel.

According to a second aspect of the embodiments of the present disclosure, there is provided an OLED module including:

any one of the display panels with the touch control function;

and the control chip is used for controlling the display of the display panel.

According to a third aspect of the embodiments of the present disclosure, there is provided a display including:

any one of the above OLED modules includes:

any one of the display panels with a touch function;

and the control chip is used for controlling the display of the display panel.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural diagram of a display panel with a touch function according to an exemplary embodiment.

Fig. 2 is a schematic structural diagram of an organic film layer in a display panel with a touch function according to an exemplary embodiment.

Fig. 3 is a schematic diagram of a structure of a transmission source according to an exemplary embodiment.

FIG. 4 is a block diagram illustrating a receive source in accordance with an exemplary embodiment.

Fig. 5 is a schematic structural diagram of a touch functional layer according to an exemplary embodiment.

Fig. 6 is a schematic structural diagram of a display panel with a touch function according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

With the rapid progress of display technology, Organic Light Emitting Diodes (OLEDs), which are current type Light Emitting devices, are increasingly used in high performance display fields due to their characteristics of self-luminescence, fast response, wide viewing angle, and being capable of being fabricated on flexible substrates.

At present, the touch and the packaging layer of the embedded display panel are combined, a three-layer structure, an inorganic packaging layer, an organic layer and a transparent conducting layer are needed, the preparation process is complex, the used manufacturing procedures are more, and the manufacturing yield is reduced; meanwhile, the transparent conducting layer is an inorganic substance, and a larger interface stress exists between the transparent conducting layer and the inorganic packaging film layer, so that the flexible OLED is not beneficial to bending and is easy to break.

The problem that this embodiment was solved is: how to improve the bending characteristic and prevent the fracture while simplifying the process.

In order to achieve better thinning and avoid the cost of adding a layer of film material in an external-hanging touch mode, the pixel unit is occupied due to the in-cell technical mode of the display panel, meanwhile, the OLED cathode on the panel can affect the signal of the touch layer (touch), and the like. Here, the on-cell refers to a method of embedding a touch screen between a color filter substrate and a polarizer of a display screen, that is, providing a touch sensor on a liquid crystal panel.

Example one

Fig. 1 is a block diagram illustrating a touch-sensitive display panel according to an exemplary embodiment. As shown in fig. 1, the touch display panel includes a substrate 10 and a backplane light-emitting layer 20, and the touch display panel includes a thin film sealing layer 30 with a touch functional layer 301; the touch functional layer 301 comprises an organic film layer 3011 and an inorganic packaging layer 3012;

wherein the organic film 3011 is a transparent conductive film; the inorganic encapsulation layer 3012 is used to isolate the organic film layer from the outside.

The backplane light-emitting layer 20 of the present embodiment includes a Thin Film Transistor (TFT) circuit and an organic light-emitting device disposed over the TFT. Here, the touch display panel provided in this embodiment can implement a touch function through the touch function layer 301.

The inorganic encapsulating layer 3012 in this embodiment may be a multilayer film. The material of the organic film layer in this embodiment may be a transparent and conductive material, such as a metal compound film, or a transparent film doped with a conductive substance, such as a film doped with an oxide or a mixed oxide. This embodiment is not limited thereto.

In the embodiment, the problems of complex process, complex film structure and the like at present are solved, the process of the process is simplified, and the yield of the process is improved; meanwhile, the matching structure of organic matters and inorganic matters is adopted, so that the problem of stress matching among multiple layers of inorganic matters is avoided, the bending characteristic of the display panel is improved, and the phenomenon of fracture in the bending process is avoided.

In one embodiment, the organic film layer 3011 includes: the capacitive touch panel comprises a plurality of emission sources 3011a for emitting signals, a plurality of receiving sources 3011b for receiving signals in the process of detecting capacitance values of the display panel, and a bridge 3011c arranged between the emission sources 3011a and the receiving sources 3011b, wherein the bridge 3011c is used for isolating the emission sources 3011a and the receiving sources 3011b so that the two sources are electrically isolated.

Here, all the emission sources 3011a, all the reception sources 3011b, and all the bridges 3011c of the organic film 3011 correspond to constituent Tx (emission) layers, constituent Rx (reception) layers, and constituent isolation layers between the Tx and Rx layers.

In order to facilitate the manufacturing, realize the way of once patterning of Tx layer and insulating layer, simplify the process, and more favorable bending than inorganic matter, prevent the display panel from breaking, the material of the insulating layer is organic material. However, this embodiment is not limited to organic materials, but may be inorganic materials, and preferably inorganic materials that facilitate bending.

In one embodiment, as shown in fig. 2, the emission sources 3011a and the reception sources 3011b are bridge-spanning regions alternately arranged in the organic film layer 3011, and an insulating layer is disposed between the emission sources 3011a and the reception sources 3011 b. In this embodiment, the emission sources 3011a are the stripes of the large grid pattern in fig. 2; the receive source 3011b is a stripe of the small mesh in FIG. 2; the bridge 3011c is a long strip of vertical stripes in FIG. 2.

In this embodiment, the AMOLED display screen and the touch screen can be integrated on the same substrate, and the organic film 3011 may include a Tx layer and an Rx layer of the in-cell touch panel, and an insulating layer. The touch display panel which is thinner and is more resistant to bending can be manufactured by reducing the thickness of the substrate.

In one embodiment, as shown in fig. 3, a first pattern wire 3011d is disposed on emission source 3011 a; as shown in fig. 4, a second pattern wire 3011e is provided on the reception source 3011 b.

Here, the first pattern wire 3011d and the second pattern wire 3011e are set in advance.

In one embodiment, the pattern wires include a first pattern wire 3011d and a second pattern wire 3011e, arranged by:

forming pattern wires in a printing mode;

forming pattern wires in a Photo mode;

forming a pattern wire in a dry etching mode;

and forming a pattern wire in a wet etching mode.

In one embodiment, to isolate moisture and oxygen, inorganic encapsulation layer 3012 includes a first inorganic encapsulation layer 3012a and a second inorganic encapsulation layer 3012 b;

the first inorganic encapsulation layer 3012a is encapsulated on the organic film layer 3011, and the second inorganic encapsulation layer 3012b is encapsulated under the organic film layer 3011.

The upper part is the preparation sequence when all the film layers are prepared layer by layer according to the packaging sequence, wherein the lower layer is prepared firstly, the upper layer is prepared later, namely the direction closer to the outside is, and the lower direction is the opposite direction.

In one embodiment, as shown in fig. 5, the structure sequence of the touch functional layer 301 is:

the organic film layer 3011 and the first inorganic encapsulating layer 3012a are formed in this order from the second inorganic encapsulating layer 3012b of the substrate 10 and the back plate light-emitting layer 20.

In one embodiment, the inorganic encapsulation layer 3012 is made of at least one of nitride and oxide.

Corresponding to the Active Matrix Driving Organic Light Emitting Diode (AMOLED) display panel with the touch function 30 shown in fig. 1, by adding the touch function layer 30 in the thin film package, the TFT, the OLED device and the touch function can be implemented on one substrate.

In one embodiment, as shown in fig. 6, the display panel further includes: a polarizer 40 disposed on the first inorganic encapsulation layer 3012 a; a cover film 50 disposed on the polarizer 40.

In this embodiment, the above structure can be prepared by:

after the OLED (back panel light emitting layer 20) is manufactured, the touch functional layer is prepared by laminating an organic layer and an inorganic layer. The outer side of the OLED is a second inorganic encapsulation layer 3012b, a conductive organic film 3011 is prepared on the second inorganic encapsulation layer 3012b, a first inorganic encapsulation layer 3012a is prepared on the outermost layer on the organic film 3011, a polarizer 40 is prepared on the first inorganic encapsulation layer 3012a, and a cover film 50 is prepared on the polarizer 40, thereby completing the preparation of the entire display panel with a touch function.

The preparation method of the organic film layer comprises the following steps:

preparing a transparent conductive organic film layer 3011, preparing a transparent insulating organic material on the transparent conductive organic film layer 3011, specifically, preparing and forming a first pattern wire 3011d by a one-step process in a dry etching manner, preparing a bridge 3011c made of an insulating material on the side of the first pattern wire 3011d by a dry etching process, and preparing a second pattern wire 3011e of a receiving source 3011b on the side of the bridge 3011 c. A bridge 3011c is fabricated between each of the spacings of the emission source 3011a and the receive source 3011b to avoid oxidation and contact problems between the emission source 3011a and the receive source 3011 b.

The display panel of the present embodiment may be an AMOLED display panel.

Example two

The present embodiment provides an Organic Light-Emitting Diode (OLED), including:

any one of the display panels with the touch control function;

and the control chip is used for controlling the display of the display panel.

Example two

The present embodiment provides a display, including:

an OLED module, comprising:

any one of the display panels with a touch function;

and the control chip is used for controlling the display of the display panel.

Embodiments of the invention provide a touch-sensitive display panel.

The whole structure of the control chip is composed of a host interface, a controller, a clock generator and the like, but the internal composition of different control chips is greatly different. For example, in terms of input interface, some control chips only have analog input interface; some control chips have analog and digital interfaces; there are some main control chips, which only receive the digital signal output by the external analog-to-digital conversion circuit because there is no integrated analog-to-digital conversion circuit.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A display panel with touch control function comprises a substrate and a back plate light emitting layer, and is characterized by further comprising a thin film sealing layer with a touch control function layer; the touch control functional layer comprises an organic film layer and an inorganic packaging layer;

wherein, the organic film layer is a transparent conductive film; the inorganic matter packaging layer is used for isolating the organic matter film layer from the outside;

the organic film layer includes:

a plurality of emission sources for emitting signals, a plurality of reception sources for receiving signals, and a bridge disposed between the emission sources and the reception sources in detecting a capacitance value of the display panel, wherein the plurality of emission sources and the plurality of reception sources are alternately disposed within an organic film, the bridge isolating the emission sources and the reception sources;

the plurality of emission sources, the plurality of receiving sources and the bridge span are all made of organic materials.

2. The display panel according to claim 1, wherein a first pattern wire is disposed on the emission source; the receiving source is provided with a second pattern wire.

3. The display panel according to claim 2, wherein pattern wires including the first pattern wire and the second pattern wire are provided by:

forming a pattern wire in a printing mode;

forming a pattern wire in a photographing mode;

forming a pattern wire in a dry etching mode;

and forming a pattern wire in a wet etching mode.

4. The display panel of claim 1, wherein the inorganic encapsulation layer comprises a first inorganic encapsulation layer and a second inorganic encapsulation layer;

5. The display panel of claim 1, wherein the touch functional layer has a structure sequence of:

6. The display panel of claim 1, wherein the inorganic encapsulation layer is made of at least one of nitride and oxide.

7. The display panel according to claim 4, characterized in that the display panel further comprises: a polarizer disposed on the first inorganic encapsulation layer; and a cover film disposed on the polarizer.

8. An organic light emitting OLED module, comprising:

the display panel with a touch function according to any one of claims 1 to 7;

and the control chip is used for controlling the display of the display panel.

9. A display, comprising:

an OLED module, comprising:

the display panel with a touch function according to any one of claims 1 to 7;

and the control chip is used for controlling the display of the display panel.