CN112764257A

CN112764257A - Display panel, grinding head and display device

Info

Publication number: CN112764257A
Application number: CN202110148073.5A
Authority: CN
Inventors: 任维
Original assignee: TCL Huaxing Photoelectric Technology Co Ltd
Current assignee: TCL China Star Optoelectronics Technology Co Ltd; TCL Huaxing Photoelectric Technology Co Ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-05-07

Abstract

The application provides a display panel, a grinding head and a display device, wherein the display panel comprises an array substrate; the color film substrate is arranged opposite to the array substrate; the conducting layer is arranged on one surface, facing the array substrate, of the color film substrate, and the end face of the conducting layer is exposed out of the side face of the color film substrate; the sealing layer is arranged between the conducting layer and the color film substrate and is exposed on the side surface of the color film substrate, the sealing layer is provided with a notch, the notch is exposed on the side surface of the color film substrate, and the part of the conducting layer, corresponding to one surface of the conducting layer facing the sealing layer, is exposed on the notch; and the silver paste layer is partially arranged in the gap and is connected with the side surface of the conducting layer exposed in the color film substrate and the part exposed in the gap. This application is through setting up the breach with the area of being connected between increase silver thick liquid layer and the conducting layer for difficult disconnection between silver thick liquid layer and the conducting layer, thereby improve display panel's output rate.

Description

Display panel, grinding head and display device

Technical Field

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

Background

With the rapid development of Liquid Crystal Display (LCD) devices, consumers have higher and higher quality requirements for market LCD product differentiation; especially for narrow frames, frameless, and spliced screens, the demand for products is increasing, and for narrow frames and extremely narrow frame technologies, some technical problems are faced.

The technical difficulty of the existing narrow frame is module binding (binding), and the module binding narrow frame mainly comprises narrow binding and side binding; the frame is extremely narrow to a certain range, and the requirement of limiting the space of the peripheral design (layout) can be met only by adopting a side binding technology; the principle of the side binding method mainly adopts the technology that the metal contact conduction of the side of OC is utilized, and the side glass (glass) is side-ground to smooth printed silver (Ag) lines or silver-plated laser engraved crystal-coated film (COF) is bound on the side.

The difference between the side binding process flow and the normal binding rear end is mainly divided into three steps: the method comprises a first side grinding pretreatment process, a second silver paste process, and a third binding process. The side grinding pretreatment mainly includes cutting out lighting test pads (pads) of a liquid crystal panel (opencell), and performing side surface flat grinding on the panel to expose metal of outer bonding pins (OLB). But present outer laminating pin is only naked terminal surface and silver thick liquid are connected, and area of contact between them is very little, when leading to production and processing both to connect, is difficult to the mutual contact, breaks off easily, makes the output yield very low.

Disclosure of Invention

The application provides a display panel, bistrique and display device to solve the not high problem of current display panel output yield.

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

an array substrate;

the color film substrate is arranged opposite to the array substrate;

the conducting layer is arranged on one surface, facing the array substrate, of the color film substrate, and the end face of the conducting layer is exposed out of the side face of the color film substrate;

the sealing layer is arranged between the conducting layer and the color film substrate and is exposed on the side surface of the color film substrate, the sealing layer is provided with a notch, the notch is exposed on the side surface of the color film substrate, and the part of the conducting layer, corresponding to one surface of the conducting layer facing the sealing layer, is exposed on the notch;

and the silver paste layer is partially arranged in the gap and is connected with the side surface of the conducting layer exposed in the color film substrate and the part exposed in the gap.

In one possible implementation of the present application, the gap has a width in a range of 10 μm to 20 μm and a height in a range of 1 μm to 3 μm.

In a possible implementation manner of the present application, a cross section of the notch is any one of a triangle, a rectangle, and an arc.

In a possible implementation manner of the present application, the display panel further includes an insulating layer, where the insulating layer is disposed on a surface of the conductive layer facing the color film substrate, and an end portion of the insulating layer is exposed in the notch.

In a possible implementation manner of the present application, an end surface of the insulating layer exposed in the notch and an inner wall of the notch are in smooth transition.

In a possible implementation manner of the present application, the silver paste layer is disposed on the side surfaces of the color film substrate and the array substrate.

In a possible implementation manner of the present application, the side surfaces of the array substrate, the color film substrate, and the conductive layer, which are close to the silver paste layer, are flush with each other.

In one possible implementation manner of the present application, the conductive layer is formed by stacking two metal layers.

In one possible implementation of the present application, the thickness of the conductive layer ranges from 1000nm to 1600 nm.

On the other hand, this application still provides a bistrique, the bistrique is used for making the aforesaid display panel, the bistrique includes:

a grinding head body;

a first sharpener part arranged on the sharpener body,

and the second sharpener part is arranged on the surface of the first sharpener part, and the height of the bulge of the second sharpener part is less than 10 microns.

On the other hand, the application also provides a display device which comprises the display panel.

According to the display panel, the grinding head and the display device, the conducting layer and the sealing layer which are exposed on the side surface of the color film substrate are provided with the notches, the notches are exposed on the side surface of the color film substrate, and the corresponding part of the conducting layer facing to the sealing layer is exposed on the notches, so that the silver paste layer can be connected with the conducting layer which is exposed on the side surface of the color film substrate and the part which is exposed in the notches, the connecting area between the silver paste layer and the conducting layer is increased, the silver paste layer and the conducting layer are not prone to being disconnected, and the output rate of the display panel is improved.

Drawings

The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present application.

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

Fig. 3 is a schematic structural diagram of a display panel according to yet another embodiment of the present application.

Fig. 4 is a schematic structural diagram of a display panel and a grinding head provided in 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 is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1 and fig. 2, an embodiment of the present invention provides a display panel 100, including: the display panel comprises an array substrate 10, a color film substrate 20, a conducting layer 30, a sealing layer 40 and a silver paste layer 50.

The color film substrate 20 is arranged opposite to the array substrate 10. The conductive layer 30 is disposed on a surface of the color filter substrate 20 facing the array substrate 10, and an end surface of the conductive layer 30 is exposed at a side surface of the color filter substrate 20.

The sealing layer 40 is disposed between the conductive layer 30 and the color filter substrate 20 and exposed to the side surface of the color filter substrate 20, the sealing layer 40 is provided with a notch 41, the notch 41 is exposed to the side surface of the color filter substrate 20, and a portion of the conductive layer 30 corresponding to a surface facing the sealing layer 40 is exposed to the notch 41.

The silver paste layer 50 is partially disposed in the notch 41, and is connected to the conductive layer 30 exposed on the side surface of the color film substrate 20 and the portion exposed in the notch 41.

The conductive layer 30 may be made of copper, the sealing layer 40 may be made of acrylic or UV curable adhesive, and the silver paste layer 50 may be made of silver.

In the display panel provided in the embodiment of the application, the conductive layer 30 and the sealing layer 40 exposed on the side surface of the color film substrate 20 are provided with the notch 41, and the notch 41 is exposed on the side surface of the color film substrate 20, and the portion of the conductive layer 30 corresponding to the side surface of the sealing layer 40 is exposed in the notch 41, so that the silver paste layer 50 can be connected with the portion of the conductive layer 30 exposed on the side surface of the color film substrate 20 and exposed in the notch 41, thereby increasing the connection area between the silver paste layer 50 and the conductive layer 30, making the silver paste layer 50 and the conductive layer 30 not easily disconnected, and improving the yield of the display panel.

In some embodiments, the notches 41 range from 10 μm to 20 μm in width and 1 μm to 3 μm in height. Therefore, the silver paste layer 50 is convenient for printing and connecting the side surface of the color film substrate 20 and the part of the notch 41, and the connection is not broken, so that the yield of good products is further improved.

In some embodiments, the cross-section of the notch 41 is any one of triangular, rectangular, and arc-shaped. Specifically, the cross section of the notch 41 is arc-shaped, so as to facilitate processing. Specifically, a portion of the silver paste layer 50 is adapted to the notch 41, so that the silver paste layer 50 is tightly connected to the inner wall of the notch 41 and the conductive layer 30 exposed in the notch 41.

In some embodiments, the display panel further includes an insulating layer 60, where the insulating layer 60 is disposed on a surface of the conductive layer 30 facing the color filter substrate 20, and an end portion of the insulating layer is exposed in the notch 41. The insulating layer 60 may be made of PV plastic material to achieve the insulating effect and save the cost. The end of the insulating layer 60 is exposed in the notch 41, so as to prevent the insulating layer 60 from interfering with the portion of the conductive layer 30 exposed in the notch 41, thereby further improving the yield.

In some embodiments, the end surface of the insulating layer 60 exposed in the notch 41 and the inner wall of the notch 41 are in smooth transition, so as to facilitate processing and manufacture.

In some embodiments, the silver paste layer 50 is disposed on the side surfaces of the color filter substrate 20 and the array substrate 10. The silver paste layer 50 is convenient to save materials of the silver paste layer 50, and the silver paste layer 50 is convenient to be tightly connected with the array substrate 10 and the end face, close to the notch 41, of the color film substrate 20, so that the silver paste layer 50 is tightly connected with the end portion of the corresponding conducting layer 30 and the part, in the notch 41, of the conducting layer 30, the contact area between the end portion of the conducting layer 50 and the conducting layer 30 is larger and firmer, and the yield of good products is further improved.

Specifically, the side surfaces of the array substrate 10, the color filter substrate 20, and the conductive layer 30 close to the silver paste layer 50 are flush with each other. The silver paste layer 50 is printed on the end surfaces of the array substrate 10 and the color film substrate 20 close to the notch 41, and the conductive layer 30 is connected to the portion exposed on the end surfaces of the array substrate 10 and the color film substrate 20 and the portion exposed in the notch 41, so that the processing efficiency and the yield of good products can be improved.

In some embodiments, as shown in fig. 3, the conductive layer 30 is formed by stacking two metal layers. Specifically, the thickness of the conductive layer 30 ranges from 1000nm to 1600 nm. The stress generated by the single-layer conductive layer 30 due to the thickening of the single-layer conductive layer is also correspondingly increased, when the array substrate 10 is made of hard materials such as glass materials, the array substrate 10 of the borne conductive layer 30 is easy to damage, and the conductive layer 30 is divided into two metal layers to be superposed, so that the stress between the conductive layers 30 is reduced, the display panel is not easy to damage in the subsequent processing or transportation process, the yield of products is improved, and the service life of the display panel is prolonged.

In some embodiments, the display panel further includes a pixel electrode layer 70, and the pixel electrode layer 70 is disposed on a side of the color filter substrate 20 facing the array substrate 10. The pixel electrode layer 70 may be made of ITO. Specifically, the pixel electrode layer 70 is disposed at a distance from the insulating layer 60. The display panel may be a liquid crystal display panel, and the pixel electrode layer 70 is used for providing a deflection electrode for the liquid crystal to control a deflection state of the liquid crystal, so as to realize display of different brightness of the display panel.

On the other hand, referring to fig. 4, the embodiment of the present application further provides a grinding head 200, where the grinding head 200 is used for manufacturing the display panel 100, and the grinding head 200 includes a first grinding blade portion 210 and a second grinding blade portion 220.

And a second sharpener part 220 provided on the surface of the first sharpener part 210, the second sharpener part 220 having a protrusion height of less than 10 μm. The first sharpener portion 210 may have a cylindrical structure, and the second sharpener portion 220 may have a cross-section that is matched with the cross-sectional shape of the notch 41, and may be any one of a triangle, a rectangle and an arc. The first sharpening part 210 and the second sharpening part 220 can be integrally formed, the end faces of the array substrate 10, the color film substrate 20 and the conducting layer 30, which are in contact with the silver paste layer 50, are machined through the first sharpening part 210, the second sharpening part 220 is used for machining the notch 41, so that the surface roughness corresponding to the notch 41 is smaller than 0.5um in the array substrate 10, the color film substrate 20 and the conducting layer 30, the connection is tighter when the silver paste layer 50 is printed, and the machining efficiency and the yield of good products are further improved. In addition, since the grinding head provided by the embodiment of the application is used for manufacturing the display panel, all the same beneficial effects are achieved, and the description of the invention is omitted herein.

During the specific use, grind out the breach through second sharpener portion 220, make its processing simple more high-efficient to increase the area of contact of the two when the silver thick liquid layer 50 of being convenient for connects conducting layer 30, thereby make convenient printing and not break the line.

In some embodiments, the grinding head 200 further includes a third grinding part 230, and the third grinding part 230 is provided to an end surface of the second grinding part 220. The third sharpening part 230 may be a cylindrical structure, and the third sharpening part 230 is used for flat grinding the side surface of the display panel 100, so that the side surface is flat, and silver paste is not easy to fall off when subsequent silver plating is facilitated.

Therefore, before the second grinding blade portion 220 grinds the notch, the third grinding blade portion 230 may be used to perform flat grinding on the side surfaces of the array substrate 10, the color filter substrate 20, and the conductive layer 30, so that the surface roughness thereof is less than 0.5 um.

On the other hand, the embodiment of the application also provides a display device, which comprises the display panel. Since the display device has the display panel, all the same beneficial effects are achieved, and the description of the invention is omitted here.

The embodiment of the application is not specifically limited to the application of the display device, and the display device can be any product or part with a display function, such as a television, a notebook computer, a tablet computer, wearable display equipment (such as an intelligent bracelet, an intelligent watch and the like), a mobile phone, virtual reality equipment, augmented reality equipment, vehicle-mounted display and the like.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The display panel, the grinding head and the display device provided by the embodiment of the application are described in detail, a specific example is applied in the description to explain the principle and the implementation of the application, and the description of the embodiment is only used to help understand the technical scheme and the core idea of the application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. A display panel, comprising:

an array substrate;

the color film substrate is arranged opposite to the array substrate;

2. The display panel according to claim 1, wherein the gap has a width ranging from 10 μm to 20 μm and a height ranging from 1 μm to 3 μm.

3. The display panel according to claim 1, wherein the cross section of the notch is any one of a triangle, a rectangle and an arc.

4. The display panel according to claim 1, further comprising an insulating layer, wherein the insulating layer is disposed on a surface of the conductive layer facing the color filter substrate, and an end portion of the insulating layer is exposed in the notch.

5. The display panel according to claim 4, wherein the end surface of the insulating layer exposed in the gap is in smooth transition with the inner wall of the gap.

6. The display panel according to claim 1, wherein the silver paste layer is disposed on the color filter substrate and the side surface of the array substrate.

7. The display panel according to claim 6, wherein the side surfaces of the array substrate, the color filter substrate and the conductive layer close to the silver paste layer are flush with each other.

8. The display panel according to any one of claims 1 to 7, wherein the conductive layer is formed by stacking two metal layers.

9. A grinding head for manufacturing a display panel according to any one of claims 1 to 8, the grinding head comprising:

a first blade grinding section;

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