CN111326565B - Display panel, manufacturing method thereof and display device - Google Patents

Abstract

The present application relates to a display panel, a display device having the same and a manufacturing method thereof. The display panel includes a display area and a non-display area, including: a substrate; a light-emitting device layer and a touch layer are sequentially stacked above the substrate. The touch layer at least includes a touch metal layer, and the touch metal layer located in the non-display area is in direct contact with at least part of the surface of the light emitting device layer located in the non-display area away from the substrate. The beneficial effects of the present application are: the display panel of the present application contacts the light-emitting device layer in the non-display area with the touch metal layer, thereby enhancing the adhesion between the light-emitting device layer and the touch-control layer, and improving the non-display area of the display panel. The strength of the film layer prevents problems such as peeling off of the touch film layer and generation of foreign matter in the non-display area of the display panel, thereby avoiding the impact on the display area.

Description

Display panel, manufacturing method thereof, and display device

technical field

The present application belongs to the technical field of display screens, and in particular relates to a display panel, a manufacturing method thereof, and a display device.

Background technique

Organic Light Emitting Diode (OLED) display is an organic electroluminescent device, which emits light by sandwiching an organic light-emitting material between a transparent anode and a metal reflective cathode, and applying a voltage to the organic light-emitting film layer. , can be used as a display device and a lighting device, and has the advantages of self-illumination, wide viewing angle, high contrast, low power consumption, and extremely high response speed.

Display panels (TP, TouchPanel) or display devices with touch functions are widely used electronic products at present, so manufacturing excellent OLED display panels with touch functions is a goal that manufacturers focus on. Combined with the characteristics of the OLED display panel, the touch layer is covered on the light-emitting device layer to realize the touch function, and the touch layer can have at least a pair of film layers that serve as wiring, capacitors, and substrate functions, but the existing touch The control layer has problems such as weak adhesion and easy peeling.

Contents of the invention

The technical problem to be solved in the present application is: to solve the problem that the touch layer in the prior art is easy to fall off during the manufacturing process, thereby providing a display panel, a display device having the same and a manufacturing method thereof.

The technical scheme that this application solves its technical problem adopts is:

A display panel, including a display area and a non-display area, including:

Substrate;

A light-emitting device layer and a touch layer are sequentially stacked above the substrate, the touch layer at least includes a touch metal layer, the touch metal layer located in the non-display area and the touch layer located in the non-display area The light emitting device layer is in direct contact with at least part of the surface away from the substrate.

In one of the embodiments, the touch layer further includes a touch inorganic layer, the touch inorganic layer located in the non-display area has at least one groove, and the touch metal located in the non-display area layer covering the touch inorganic layer located in the non-display area, the touch metal layer located in the non-display area fills the groove and at least Some surfaces are in direct contact.

In one embodiment, the opening size of the groove gradually becomes larger along the direction away from the light emitting device layer.

In one of the embodiments, the projection of the groove on the substrate is a circular, rectangular or dot pattern.

In one of the embodiments, the area of the contact surface between the touch control inorganic layer and the light emitting device layer is smaller than the area of the contact surface between the touch control metal layer and the light emitting device layer.

In one of the embodiments, the ratio of the area of the contact surface between the touch inorganic layer and the light emitting device layer to the area of the contact surface between the touch metal layer and the light emitting device layer is greater than or equal to 1/4 and less than or equal to 1/2.

A method for preparing a display panel, comprising:

providing a substrate comprising a display area and a non-display area;

A light-emitting device layer and a touch layer are sequentially prepared on the substrate, the touch layer includes at least a touch metal layer, the touch metal layer in the non-display area and the touch metal layer in the non-display area The light emitting device layer is in direct contact with at least part of the surface remote from the substrate.

In one of the embodiments, the process of sequentially preparing the light emitting device layer and the touch layer on the substrate further includes:

Prepare a touch inorganic layer on the light emitting device layer by chemical vapor deposition, remove at least part of the touch inorganic layer located in the non-display area to expose at least part of the surface of the light emitting device layer; use physical vapor deposition Prepare the touch metal layer, the touch metal layer in the non-display area covers the touch inorganic layer in the non-display area and is connected with the light-emitting device layer in the non-display area At least some of the surfaces are in direct contact.

In one of the embodiments, the step of removing at least part of the touch inorganic layer located in the non-display area includes:

An image is etched on the touch inorganic layer located in the non-display area by photolithography, and at least one groove is formed by etching the touch inorganic layer located in the non-display area through a dry etching process.

A display device, comprising the display panel as described in any one of the above.

The beneficial effect of the present application is: the display panel of the present application contacts the light-emitting device layer in the non-display area with the touch metal layer, thereby enhancing the adhesion between the light-emitting device layer and the touch-control layer, and improving the non-display area of the display panel. The strength of the film layer prevents problems such as peeling off of the touch film layer and generation of foreign matter in the non-display area of the display panel, thereby avoiding the impact on the display area.

Description of drawings

The technical solution of the present application will be further described below in conjunction with the accompanying drawings and embodiments.

FIG. 1 is a schematic partial cross-sectional view of a non-display area of a display panel according to an embodiment of the present application.

FIG. 2 is a schematic structural diagram of a display panel according to an embodiment of the present application.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and Simplified descriptions do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the invention in this application, unless otherwise specified, "plurality" means two or more.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application based on specific situations.

FIG. 1 is a schematic partial cross-sectional view of a non-display area of a display panel according to an embodiment of the present application; FIG. 2 is a schematic structural view of a display panel according to an embodiment of the present application.

When preparing the touch layer of the display panel, the touch layer material will also be prepared in the non-display area 1, such as the notch of the screen body, the camera area before the screen body cutting, the screen frame, etc., for example, the two openings shown in Figure 2 the area between the holes. However, due to the opening of the mask plate, when the encapsulation layer is prepared on the display panel, the part in the non-display area 1 is blocked by the mask plate and cannot form the encapsulation layer material, so that when the touch layer is prepared later, the area located in the non-display area 1 The touch inorganic layer in the touch layer in area 1 is in direct contact with the organic layer on the surface of the light-emitting device layer in the display panel, so that the adhesion between the touch-control layer and the surface of the light-emitting device layer in this area is weak, and it is easy to peel off. The foreign matter diffuses to the display area 2 of the screen, forming metal residues and causing the touch function of the display area 2 to fail.

The technical solution of the present application will be described in detail below with reference to the accompanying drawings and embodiments.

A display panel, including a display area 2 and a non-display area 1 as shown in Figure 2, please refer to Figure 1 for the sectional structure of the non-display area 1, the structure of the display panel includes: a substrate 10; The device layer 20 and the touch layer 30, the touch layer 30 at least includes a touch metal layer 32, the touch metal layer 32 located in the non-display area 1 and at least part of the surface of the light emitting device layer 20 located in the non-display area 1 away from the substrate 10 direct contact. The touch metal layer 32 is prepared by physical vapor deposition (Physical Vapor Deposition, PVD for short), and its material can be metal materials such as Ti, Al and their alloys, and has strong adhesion with the light emitting device layer 20, and the touch The control metal layer 32 can be used as the wiring of the touch layer 30 . The side of the light emitting device layer 20 located in the non-display area 1 away from the substrate 10 is an organic layer, and the touch metal layer 32 located in the non-display area 1 is in direct contact with at least part of the surface of the light emitting device layer 20 located in the non-display area 1 away from the substrate 10 . Contact, compared with the prior art, the touch layer 30 located in the non-display area 1 and the light-emitting device layer 20 has a stronger adhesive force, so that it can avoid If it falls off, the touch function and display effect of the display area 2 will be affected. It is worth noting that since the non-display area 1 does not require a touch function, the touch layer 30 of the non-display area 1 can all be set as a touch metal layer 32, so that the adhesion is better, thereby avoiding the problem caused by the non-display area 1 film. The layer falls off and affects the touch function and display effect of the display area 2 .

In one embodiment of the present application, the touch layer 30 further includes a touch inorganic layer 31 . The touch inorganic layer 31 is prepared by chemical vapor deposition (Chemical Vapor Deposition, CVD for short), and its material can be inorganic materials such as SixNy and SiOx. The direct contact between the inorganic layer 31 and the surface of the light-emitting device layer 20 will make the adhesion between the film layers weak, which will cause the touch layer 30 in the non-display area 1 to be prone to film peeling, which will affect the touch film layer in the display area 2. , making the touch function of the display area 2 invalid, and the display effect is also affected. Therefore, the touch inorganic layer 31 located in the non-display area 1 has at least one groove, the touch metal layer 32 located in the non-display area 1 covers the touch inorganic layer 31 located in the non-display area 1, and the touch inorganic layer 31 located in the non-display area 1 The touch metal layer 32 fills the groove and is in direct contact with at least part of the surface of the light emitting device layer 20 located in the non-display area 1 . The bottom of the groove is the surface of the light emitting device layer 20, and the touch metal layer 32 located in the non-display area 1 can be deposited and filled into the groove from the groove, and the touch metal layer 32 and the light emitting device layer 20 are at the bottom of the groove. contact, so that the touch metal layer 32 located in the non-display area 1 forms effective contact with the surface of the light-emitting device layer 20 located in the non-display area 1, which can not only enhance the adhesion between the touch-control layer 30 and the light-emitting device layer 20, but also avoid The touch layer 30 in the non-display area 1 is peeled off, which affects the touch function and luminous effect of the display area, and at this time the structure between the touch layer 30 in the non-display area 1 and the touch layer in the display area 2 is more similar Therefore, there will be no faults in the film layer at the junction of the non-display area 1 and the display area 2, thereby reducing the impact on the touch layer in the display area 2.

Further, in one embodiment of the present application, the opening size of the groove gradually increases along the direction away from the light emitting device layer 20 . At this time, the contact area between the touch inorganic layer 31 and the touch metal layer 32 is larger, and the connection surface between the touch metal layer 32 and the light emitting device layer 20 is also larger, which can not only enhance the touch control of the inorganic layer 31. The adhesion between the touch metal layer 32 can also enhance the adhesion between the touch metal layer 32 and the light emitting device layer 20 . In the present application, the cross-sectional shape of the groove is not limited to the trapezoidal shape, as long as the groove extends toward the light emitting device layer 20 to the surface of the light emitting device layer 20 , and the opening size gradually increases along the direction away from the light emitting device layer 20 .

In one embodiment of the present application, the grooves are evenly distributed in the touch inorganic layer 31 . In another embodiment, the projection of the groove on the substrate 10 is a ring, rectangle or circle. When there are multiple grooves, the shape of the projection is a plurality of concentric circles, a plurality of parallel rectangles or multiple The circular and evenly distributed grooves arranged in an array can provide a uniformly distributed adhesion effect, so that the adhesion between the touch layer 30 and the light emitting device layer 20 in the entire non-display area 1 is stronger and more stable. high. It is worth noting that, in the embodiment of the present application, the projections of the grooves on the substrate can be arranged non-uniformly, for example, the projections of the grooves in the area close to the display area are sparsely arranged, and the projections of the grooves in the area far away from the display area The dense arrangement can avoid the impact of slotting on the display area to the greatest extent.

In one embodiment of the present application, the touch inorganic layer 31 located in the non-display area 1 is uneven. The uneven touch inorganic layer 31 may include several grooves or a combination of several grooves and protrusions. At this time, there is a larger contact area between the touch inorganic layer 31 and the touch metal layer 32, so that there is a certain nesting between the two film layers, which improves the adhesion between the two, and then can be used without affecting the touch. Increase the number of grooves or increase the area of the bottom surface of the grooves under the premise of improving the adhesion of the inner film layer of the control layer 30, thereby increasing the contact area between the touch metal layer 32 in the non-display area 1 and the surface of the light emitting device layer 20, and improving Adhesion between the light emitting device layer 20 and the touch layer 30 in the non-display area 1 .

In order to ensure the adhesion effect, in one embodiment of the present application, the area of the contact surface between the touch inorganic layer 31 and the light emitting device layer 20 is smaller than the area of the contact surface between the touch metal layer 32 and the light emitting device layer 20, further, the touch inorganic layer The ratio of the area of the contact surface of the layer 31 and the light emitting device layer 20 to the area of the contact surface of the touch metal layer 32 and the light emitting device layer 20 is 1/4-1/2. The larger the area of the contact surface between the touch metal layer 32 and the light emitting device layer 20 is, the better the adhesion between the light emitting device layer 20 and the touch layer 30 is. When the area of the contact surface between the touch metal layer 32 and the light emitting device layer 20 is too small, such as the ratio of the area of the contact surface between the touch inorganic layer 31 and the light emitting device layer 20 to the area of the contact surface between the touch metal layer 32 and the light emitting device layer 20 is greater than 1/2, the adhesion between the light emitting device layer 20 and the touch layer 30 is insufficient, and peeling is easy to occur; but when the contact surface area between the touch metal layer 32 and the light emitting device layer 20 is too large, such as the touch inorganic layer 31 The ratio of the area of the contact surface with the light-emitting device layer 20 to the area of the contact surface of the touch metal layer 32 and the light-emitting device layer 20 is less than 1/4, and at this time the volume occupied by the touch inorganic layer 31 in the touch layer 30 is small, The contact surface between it and the touch metal layer 32 is also small, and the bonding force inside the touch layer 30 is weak and the stability is poor. Preferably, when the ratio of the area of the contact surface between the touch inorganic layer 31 and the light emitting device layer 20 to the area of the contact surface between the touch metal layer 32 and the light emitting device layer 20 is 3/8, the internal film of the touch control layer 30 When the interlayer adhesion is not affected, the adhesion to the light emitting device layer 20 is also good.

In one embodiment of the present application, there is a protective layer of OC glue (organic film layer) on the touch layer 30 . The OC glue is transparent or translucent glue with insulation, wear resistance and corrosion resistance, and has a protective effect on the touch layer 30 to prevent environmental pollution and scratches caused by frequent operations from affecting the function. In another optional embodiment, the substrate 10 is a TFT substrate. The TFT substrate is composed of thin film transistors, and the drive circuit including the thin film transistors can stably supply power to the light-emitting units, so that the display panel can produce display effects.

Based on the same inventive concept, the embodiment of the present application also provides a method for manufacturing a display panel, including:

A substrate 10 is provided, which may be a TFT substrate, and the substrate 10 includes a display area 2 and a non-display area 1; a light-emitting device layer 20 (such as an OLED device layer) and a touch layer 30 are sequentially prepared on the substrate 10, and the touch layer 30 is at least Including the touch metal layer 32 , the touch metal layer 32 located in the non-display area 1 is in direct contact with at least part of the surface of the light emitting device layer 20 located in the non-display area 1 away from the substrate 10 .

In one embodiment of the present application, the step of sequentially preparing the light-emitting device layer 20 and the touch-control layer 30 on the substrate 10 further includes: preparing the touch-control inorganic layer 31 on the light-emitting device layer 20 by chemical vapor deposition, removing at least part of the The touch inorganic layer 31 in the non-display area 1 exposes at least part of the surface of the light emitting device layer 20 located in the non-display area 1, and the touch metal layer 32 is prepared by physical vapor deposition to cover the touch inorganic layer 31 located in the non-display area 1 And it is in direct contact with at least part of the surface of the light emitting device layer 20 located in the non-display area 1 .

It should be noted that the touch inorganic layer of the present application can be prepared by chemical vapor deposition. Chemical vapor deposition is a chemical technology, which mainly uses one or several gas-phase compounds or simple substances containing thin film elements to perform chemical reactions on the surface of the substrate to form thin films. Such as using gas phase reaction at high temperature, thermal decomposition of metal halides, organic metals, hydrocarbons, etc., hydrogen reduction or chemical reaction of its mixed gas at high temperature to precipitate inorganic materials such as metals, oxides, and carbides Methods. The touch inorganic layer 31 is a thin film formed by chemical vapor deposition. Physical vapor deposition is the process of transferring atoms or molecules to the surface of the substrate by using physical processes to realize material transfer. For example, under vacuum conditions, using low-voltage, high-current arc discharge technology, using gas discharge to evaporate the target material and ionize both the evaporated material and the gas, and use the acceleration of the electric field to deposit the evaporated material and its reaction products on the substrate surface. In the present application, the above-mentioned touch metal layer 32 may be a thin film formed by physical vapor deposition.

In one embodiment of the present application, the step of removing at least part of the touch inorganic layer 31 located in the non-display area 1 includes: using yellow light lithography to photoetch an image on the touch inorganic layer 31 located in the non-display area 1, and The dry etching process etches the touch inorganic layer 31 located in the non-display area 1 to form at least one groove, so that at least part of the surface of the light-emitting device layer 20 located above the non-display area 1 is exposed. In the process of preparing the groove, using the existing equipment and technology, there is no need to modify the photomask or mask (Mask) process of the TP process, and the touch inorganic layer 31 located in the non-display area 1 is etched to remove the part located in the non-display area 1. The touch inorganic layer 31 in the non-display area 1 can expose at least part of the surface of the light emitting device layer 20 located in the non-display area 1 outside the touch inorganic layer 31 .

The preparation method of the display panel of the present application, facing the problem of film layer peeling caused by insufficient adhesion, is not limited to the rigid method of adding an adhesive, but only by adjusting the existing film layer structure by using existing equipment and technology, that is, in the The touch metal layer 32 in the above-mentioned groove improves the adhesion of the original film layer through the film layer itself, which not only has a good effect, but also saves the process and cost.

Based on the same inventive concept, an embodiment of the present application further provides a display device, which may include: the above-mentioned display panel as provided in the embodiment of the present invention.

Specifically, the display device may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and the like. The other essential components of the display device should be understood by those of ordinary skill in the art, and will not be repeated here, nor should they be regarded as limitations on the present invention.

The beneficial effects of the present application are: the display panel of the present application contacts the light-emitting device layer in the non-display area with the touch metal layer, thereby enhancing the adhesion between the light-emitting device layer and the touch-control layer, and providing a non-display area of the display panel. The strength of the film layer prevents problems such as peeling off of the touch film layer and generation of foreign matter in the non-display area of the display panel, thereby avoiding the impact on the display area.

Inspired by the above-mentioned ideal embodiment according to the present application, through the above-mentioned description content, relevant staff can make various changes and modifications within the scope of not departing from the technical idea of this application. The technical scope of this application is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (8)

1. A display panel including a display area and a non-display area, comprising:

a substrate;

a light-emitting device layer and a touch layer are sequentially stacked above the substrate, the touch layer at least comprises a touch metal layer, and the touch metal layer positioned in the non-display area is in direct contact with at least part of the surface, far away from the substrate, of the light-emitting device layer positioned in the non-display area;

the touch layer further comprises a touch inorganic layer, the touch inorganic layer located in the non-display area is provided with at least one groove, the touch metal layer located in the non-display area covers the touch inorganic layer located in the non-display area, and the touch metal layer located in the non-display area fills the groove and is in direct contact with at least part of the surface of the light-emitting device layer located in the non-display area.

2. The display panel according to claim 1, wherein an opening size of the groove becomes gradually larger in a direction away from the light-emitting device layer.

3. The display panel according to claim 2, wherein a projection of the groove on the substrate is a circular ring, a rectangular shape, or a circular shape.

4. The display panel according to claim 1, wherein an area of a contact surface of the touch inorganic layer with the light-emitting device layer is smaller than an area of a contact surface of the touch metal layer with the light-emitting device layer.

5. The display panel according to claim 4, wherein a ratio of an area of a contact surface of the touch inorganic layer and the light-emitting device layer to an area of a contact surface of the touch metal layer and the light-emitting device layer is 1/4 or more and 1/2 or less.

6. A method for manufacturing a display panel, comprising:

providing a substrate, wherein the substrate comprises a display area and a non-display area;

preparing a light-emitting device layer and a touch layer in sequence on the substrate, wherein the touch layer at least comprises a touch metal layer, and the touch metal layer positioned in the non-display area is in direct contact with at least part of the surface, far away from the substrate, of the light-emitting device layer positioned in the non-display area;

the process of sequentially preparing the light-emitting device layer and the touch layer on the substrate further comprises:

preparing a touch inorganic layer on the light-emitting device layer by adopting a chemical vapor deposition method, and removing at least part of the touch inorganic layer positioned in the non-display area to expose at least part of the surface of the light-emitting device layer;

and preparing the touch metal layer by adopting a physical vapor deposition method, wherein the touch metal layer positioned in the non-display area covers the touch inorganic layer positioned in the non-display area and is in direct contact with at least part of the surface of the light-emitting device layer positioned in the non-display area.

7. The method according to claim 6, wherein the step of removing at least a portion of the touch inorganic layer in the non-display area comprises:

and photoetching an image on the touch control inorganic layer positioned in the non-display area by adopting a yellow photoetching method, and etching the touch control inorganic layer positioned in the non-display area by using a dry etching process to form at least one groove.

8. A display device characterized by comprising the display panel according to any one of claims 1 to 5.

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