CN112382212B

CN112382212B - Display panel, manufacturing method of display panel and display screen

Info

Publication number: CN112382212B
Application number: CN202011406038.0A
Authority: CN
Inventors: 何波
Original assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-12-03
Anticipated expiration: 2040-12-03
Also published as: WO2022116304A1; CN112382212A

Abstract

The application provides a display panel, a manufacturing method of the display panel and a display screen, wherein a first substrate is arranged on a second substrate, and a splicing part on the first substrate is positioned above a bending part of the second substrate; when a plurality of display panels are spliced into a large-size display screen, the first substrates of the display panels are in contact, and the splicing parts have certain lengths and are positioned above the bent parts of the second substrates, so that a certain space can be reserved between two adjacent second substrates during splicing, the bent parts on the second substrates are prevented from being collided and extruded by the adjacent display panels, the metal wire fracture caused by extruding the bent parts is avoided, in addition, the splicing parts are utilized for splicing and aligning, the splicing accuracy is improved, and the splicing difficulty is reduced; the light shading pieces are arranged between the substrates, so that the contrast of the display panel is improved, the color difference at the joints is reduced, and the segmentation feeling of a display picture is reduced.

Description

Display panel, manufacturing method of display panel and display screen

Technical Field

The application relates to the technical field of display, in particular to a display panel, a manufacturing method of the display panel and a display screen.

Background

The Light Emitting Diode (LED) display technology is a display mode directly using LEDs as pixels. The color LED display screen is composed of basic light-emitting elements consisting of red, green and blue LEDs and is arranged in a dot matrix mode, the LED display screen is generally composed of a display module, a control system and a power supply system, and the control system controls the LEDs to be on and off to emit different color lights so as to form images. The smaller the LED crystal particles are, the smaller the pixel size of the display screen is, the finer the display effect is, and in recent years, the LED crystal particles are more and more widely applied to the display screen of micron level.

In daily use, according to different requirements, a plurality of smaller LED display panels are generally required to be spliced and combined to form a large-sized display screen. In the prior art, as shown in fig. 1, the display panel 20 includes a substrate 10, a light emitting element 11 formed by a plurality of LEDs is disposed on the substrate 10, a supporting plate 14 is disposed below the substrate, and the substrate 10 includes a flat portion 12 and a bent portion 13, on which a metal wire (not shown) is disposed. When splicing a plurality of display panel 20 into a large-size display screen, distance d between a plurality of display panel is difficult to control, and when distance d was too near, kink 13 in a display panel can be extruded by adjacent display panel, causes the fracture and the damage of wire easily in regional C department, has influenced display effect, and the accuracy of concatenation is difficult to grasp simultaneously, and the concatenation is comparatively difficult.

Disclosure of Invention

The application provides a display panel, a manufacturing method of the display panel and a display screen, which aim to solve the problem of circuit fracture when the existing display panel is spliced to form a large-size display screen.

In order to solve the technical problem, the technical scheme provided by the application is as follows:

in a first aspect, the present embodiment provides a display panel including a first substrate, a second substrate, and a connection member;

the first substrate and the second substrate are oppositely arranged, and the connecting piece is arranged between the first substrate and the second substrate and is used for fixedly attaching the first substrate and the second substrate;

the first substrate comprises a body and a splicing part, and the splicing part is positioned on the side edge of the body;

the second substrate is provided with a metal wire and comprises a flat portion and a bent portion, the bent portion is located on the side edge of the flat portion, the flat portion is located below the body, the bent portion is located below the splicing portion, and the length of the first substrate is larger than that of the flat portion on the second substrate.

In some embodiments, the display panel further comprises a light emitting member, the second substrate comprises a light emitting member, the light emitting member is positioned between the first substrate and the second substrate, and the light emitting member comprises a plurality of LEDs arranged in an array.

In some embodiments, the length of the splice is no less than the distance between two adjacent LEDs of the plurality of LEDs.

In some embodiments, the first substrate includes a light shielding member, the light shielding member is located between the first substrate and the light emitting member, the light shielding member has a plurality of hollow areas thereon, and the plurality of hollow areas correspond to the plurality of LEDs arranged in the array one to one.

In some embodiments, the area of each of the plurality of hollowed-out regions is the same as the area of each of the plurality of arrayed LEDs.

In some embodiments, the length of the splice is not less than the radius of curvature of the bend.

In some embodiments, the body and the splice are integrally formed.

In some embodiments, the display panel further comprises a support plate located below the flat portion.

On the other hand, this application embodiment provides a display screen, the display screen is formed by a plurality of display panels concatenation combination, display panel is in this application embodiment's display panel.

In another aspect, an embodiment of the present application provides a method for manufacturing a display panel, including the steps of:

providing a first substrate and a second substrate, wherein the first substrate comprises a light shielding piece with a plurality of hollow areas;

carrying out circuit manufacturing on a second substrate to ensure that metal wires are distributed on the second substrate;

attaching the first substrate to the second substrate, and fixing the first substrate and the second substrate by using a connecting piece;

cutting off a portion of the second substrate at an edge of the second substrate;

and bending the second substrate at the edge of the second substrate to form a flat part and a bent part, wherein the length of the flat part is not more than that of the body on the first substrate, the upper part of the flat part corresponds to the body of the first substrate, and the upper part of the bent part corresponds to the splicing part of the first substrate.

The application provides a display panel, display panel's manufacturing method and display screen, through set up first base plate on the second base plate, and make the concatenation portion on the first base plate be located the kink top of second base plate, when splicing a plurality of display panels into large-size display screen, contact takes place between a plurality of display panel's the first base plate, because the concatenation portion has certain length, and the concatenation portion is located the kink top of second base plate, when a plurality of display panels make up the concatenation, can make and leave certain space between two adjacent second base plates, prevent that the kink on the second base plate from being collided and extrudeed by adjacent display panel, avoid the wire fracture because extrude the kink, utilize the concatenation portion to splice and counterpoint in addition, the accuracy of concatenation has been improved, the concatenation degree of difficulty has been reduced.

Drawings

The technical solutions and other advantages of the present application will become apparent from the following detailed description of specific embodiments of the present application when taken in conjunction with the accompanying drawings.

FIG. 1 is a schematic structural diagram of a display panel in the prior art when being assembled;

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

FIG. 3 is a schematic structural diagram of a display panel according to another embodiment of the present application when assembled;

FIG. 4 is a schematic structural diagram of a display panel structure according to another embodiment of the present application during assembly;

fig. 5 is a top view of a display panel provided in the present application;

FIG. 6 is a schematic flow chart of a method for manufacturing a display panel according to the present disclosure;

FIG. 7 is a schematic structural diagram of a first substrate according to an embodiment of the present disclosure;

FIG. 8 is a side view of a second substrate prior to bending in an embodiment of the present application;

FIG. 9 is a top view of a second substrate prior to bending in an embodiment of the present application;

FIG. 10 is a schematic structural view of the first substrate and the second substrate after being bonded together and without being bent;

fig. 11 is a schematic structural view of a display panel formed by cutting and bending a second substrate;

FIG. 12 is a side view of the display panel after it has been tiled;

fig. 13 is a plan view of the display panel after being tiled.

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.

The present application provides a display panel, a method of manufacturing the display panel, and a display panel using the display panel, which will be described in detail below.

First, an embodiment of the present application provides a display panel, where the display panel includes a first substrate, a second substrate, and a connecting member; the first substrate and the second substrate are oppositely arranged, and the connecting piece is arranged between the first substrate and the second substrate and is used for fixedly attaching the first substrate and the second substrate; the first substrate comprises a body and a splicing part, and the splicing part is positioned on the side edge of the body; the second substrate is provided with a metal wire and comprises a flat portion and a bent portion, the bent portion is located on the side edge of the flat portion, the flat portion is located below the body, the bent portion is located below the splicing portion, and the length of the first substrate is larger than that of the flat portion on the second substrate.

In the embodiment of the application, the first substrate is arranged on the second substrate, the splicing part on the first substrate is located above the bending part of the second substrate, when a plurality of display panels are spliced into a large-size display screen, the first substrates of the display panels are in contact with each other, the splicing part is located above the bending part of the second substrate, and the splicing part is located above the bending part of the second substrate.

In one embodiment, the display panel is an LED display panel, and as shown in fig. 2, the display panel 100 includes a first substrate 101, a second substrate 201, and a connecting member 301. The first substrate 101 includes a light emitting member 210 thereon, and the light emitting member 210 includes a plurality of LEDs 202 arranged in an array. The first substrate 101 and the second substrate 201 are disposed opposite to each other and are fixed and attached to each other by a connecting member 301, and a metal wire (not shown) is formed on the second substrate 201. In the embodiment of the present application, the connecting element 301 is an Optical Clear Adhesive (OCA), which has the advantages of high light transmittance and high adhesion, and other materials may be used for the connecting element 301 as long as the light transmittance and the adhesion meet the actual requirements, which is not limited herein.

The first substrate 101 comprises a body 102 and a spliced portion 103, the spliced portion 103 is located on the side of the body 102, the second substrate 201 comprises a flat portion 211 and a bent portion 212, the bent portion 212 is located on the side of the flat portion 211, the flat portion 211 is located below the body 102, the bent portion 212 is located below the spliced portion 103, and the length d1 of the first substrate is greater than the length d2 of the flat portion on the second substrate.

The second substrate 201 is made of polyimide, and metal wires are distributed on the second substrate 201 after a circuit is manufactured on the second substrate 201. When the display panels 100 are spliced, the first substrates 101 on the display panels 100 are in contact with each other, because the splicing portion 103 has a certain length d3, and the splicing portion 103 is located above the bending portion 212 of the second substrate 201, a certain space can be left between two adjacent second substrates 201, that is, a certain distance e can be kept between the flat portions 211 on the two adjacent second substrates 201, so that the bending portion 212 on the second substrate 201 is prevented from being collided and extruded by the adjacent display panels, and the metal conducting wires on the bending portion 212 cannot be broken due to extrusion.

In some embodiments of the present application, the first substrate 101 is made of glass, which has good light transmittance and relatively high rigidity, and the rigidity of the first substrate 101 is greater than that of the second substrate 201, so that deformation of the joint 103 on the first substrate 101 due to being pressed can be reduced when a plurality of display panels are spliced, and a risk of breaking a metal wire after the bending portion 212 is pressed is reduced.

In some embodiments of the present application, as shown in fig. 2, the length d3 of the splice 103 is not less than the distance d4 between two adjacent LEDs 202 of the plurality of LEDs 202. If the length of the joint 103 is too small, after a plurality of display panels are joined, the space between two adjacent second substrates 201 is too small, i.e. the distance e between the flat portions 211 on two adjacent second substrates 201 is too small, and when the curvature of the bending portion 212 is large, the bending portion 212 on the second substrate 201 is easily pressed by the adjacent display panels. When the length d3 of the joint is equal to the distance d4 between the LEDs 202, it is ensured that the metal wires on the bending portion 212 are not easily broken by squeezing, and the large-size display screen after jointing has good display uniformity.

In some embodiments of the present application, as shown in fig. 3, the length d3 of the joint portion 103 is equal to the radius R of curvature of the bending portion 212, so that it can be ensured that after a plurality of display panels 100 are jointed, a sufficient space is left between two adjacent second substrates 201, and the risk of breaking the metal wires due to the pressing of the bending portion 212 is minimized. It can be understood that the length d3 of the joint 103 may also be larger than the radius R of curvature of the bending part 212, but too large a length d3 may cause the pixel pitch of two adjacent display panels 100 at the joint to be too large, which affects the display effect of the large-size display screen after the joint.

In some embodiments of the present application, as shown in fig. 3, the body 102 and the joint 103 on the first substrate 101 are integrally formed, so that the manufacturing process of the first substrate 101 can be simplified. It will be appreciated that the body 102 and the splice 103 may also be two separate parts, with the body 102 and the splice 103 being adhesively secured therebetween.

In some embodiments of the present application, as shown in fig. 4, the display panel 100 further includes a support plate 401, the support plate 401 is located below the flat portion 211 on the second substrate 201, and the support plate 401 can increase the rigidity of the display panel structure, so that the structure of the display panel is more stable. The material of the supporting plate 401 may be glass, or may be a material with certain rigidity, such as resin, and is not limited herein.

In some embodiments of the present application, as shown in fig. 4, the length d5 of the supporting plate 401 is equal to the length d2 of the flat portion 211 on the second substrate 201, so that the supporting plate 401 can support the second substrate 201 well, the material of the supporting plate 401 can be saved, and the manufacturing cost of the display panel 100 can be reduced.

In some embodiments of the present application, as shown in fig. 4, the first substrate 101 includes a light shielding member 302, the light shielding member 302 is located between the first substrate 101 and the second substrate 201, the light shielding member 302 is located between the first substrate 101 and the plurality of LEDs 202, the light shielding member 302 has a plurality of hollow areas 303, and the plurality of hollow areas 303 correspond to the plurality of LEDs 202 arranged in an array one to one. The light shielding member 302 enables light emitted by the plurality of LEDs 202 on the second substrate 201 to pass through only the plurality of hollow-out regions 303, so as to prevent color mixing between adjacent LEDs, thereby improving the contrast of the display panel 100; in addition, at the joint of two adjacent display panels 100, due to the existence of the light shielding member 302, the color at the joint can be kept consistent, and the image segmentation feeling of the large-size display screen formed by the joint due to the color difference at the joint is avoided. The light shielding member 302 is required to have a good light shielding effect, and may be made of a material capable of absorbing light well, such as black resin, or chromium-containing alloy.

In some embodiments of the present application, as shown in fig. 4, an area of each of the plurality of hollow-out regions 303 is the same as an area of each of the plurality of LEDs 202 arranged in an array, so that the light shielding member 302 can achieve a best light shielding effect, and the brightness of the display panel can be ensured, so that the light emitting efficiency of the display panel is not reduced by the light shielding member 302.

The embodiment of the present application further provides a display screen, which is formed by splicing display panels in the embodiment of the present application, as shown in fig. 4, two adjacent display panels 100 are combined and spliced by contact between a splicing portion 103 on one first substrate 101 and a body 102 on another first substrate 101, and it can be understood that two adjacent display panels 100 may also be combined and spliced by contact between splicing portions 103 on two first substrates 101. The display panels 100 can be fixed by glue at the joint of the two display panels 100, so as to improve the structural stability of the large-size display screen formed by splicing.

The embodiment of the application also provides a preparation method of the display panel, which comprises the following steps:

providing a first substrate and a second substrate;

Fig. 6 is a flowchart of an embodiment of a method for manufacturing a display panel in an embodiment of the present application, where as shown in the figure, the method includes:

s101, providing a first substrate and a second substrate, wherein the first substrate comprises a light shielding piece with a plurality of hollow areas;

in the embodiment of the present application, the material of the second substrate 201 is polyimide, and the material of the first substrate 101 may be glass or resin; the light-shielding member 302 is formed on the first substrate 101 by a photolithography process, and a side view of the formed first substrate 101 is shown in fig. 7.

And S102, manufacturing a circuit on the second substrate.

The circuit is fabricated on the second substrate 201, so that metal wires are distributed on the second substrate 201, and the processes adopted by the metal wires may be a Low Temperature Polysilicon (LTPS) process, an Indium Gallium Zinc Oxide (IGZO) process, and the like.

In the present embodiment, after the circuit is fabricated on the second substrate 201, the plurality of LEDs are transferred to the second substrate 201 to form the light emitting device. The transfer of the LED202 may take the following approach: pouring a plurality of LEDs into the holding tank that is equipped with the solution, the bottom of holding tank is equipped with the transfer base plate, be equipped with a plurality of holes on the transfer base plate, the bottom of holding tank is equipped with suction filtration mouth and suction filtration device, suction filtration device makes the solution of holding tank flow to suction filtration mouth, drive LED flow direction holding tank bottom, and during the embedding advances the hole that shifts the base plate, at last through shifting base plate and second base plate counterpoint, shift LED to the second base plate on during the LED fixed position of predetermineeing, this method also can have higher efficiency when shifting the less LED chip of size.

The structure of the finally formed second substrate is shown in fig. 8 and 9.

S103, bonding the first substrate and the second substrate, and fixing the first substrate and the second substrate by using a connecting piece.

The first substrate 101 and the second substrate 201 are aligned and bonded, and then the first substrate and the second substrate are fixed by a connecting member, where the connecting member is an optical adhesive (OCA), and it can be understood that the connecting member may be other adhesive with good light transmittance and adhesion.

In some embodiments of the present disclosure, a light shielding member 302 including a plurality of hollow-out regions 303 is further disposed on the first substrate 101, and when the first substrate 101 and the second substrate 201 are aligned and attached, the LED chip is just located at the hollow-out position of the light shielding member 302.

The light shielding piece 302 can be made of nonferrous chromium or chromium-containing alloy, the nonferrous chromium or the chromium-containing alloy has good absorption effect on light, the light shielding piece 302 can also be made of black resin, and the use of the black resin is more environment-friendly and lower in cost than the use of chromium-containing metal. By performing the patterning process on the light shielding member 302, a plurality of hollow-out regions 303 are formed on the light shielding member 302, and the light shielding member 302 having the plurality of hollow-out regions 303 can be manufactured by a photolithography process.

Fig. 10 shows a structure after the first substrate 101 and the second substrate 201 are bonded to each other.

And S104, cutting off a part of the second substrate at the edge of the second substrate.

In order to facilitate the subsequent bending of the second substrate 201, as shown in fig. 5, a portion of the second substrate 213 in the bending region of the display panel is cut away, and a portion 214 to be bent is remained.

And S105, bending the second substrate at the edge of the second substrate to form a flat part and a bent part.

And bending the second substrate at the edge of the second substrate, wherein the length of the first substrate is greater than that of the flat part on the second substrate, the upper part of the flat part corresponds to the body of the first substrate, and the upper part of the bent part corresponds to the splicing part of the first substrate.

As shown in fig. 4 and 5, after the portion 214 to be bent on the second substrate 201 is bent, a flat portion 211 and a bent portion 212 are formed after bending, the flat portion 211 is located below the body 102, the bent portion 212 is located below the splicing portion 103, and the length d1 of the first substrate 101 is greater than the length d2 of the flat portion 211 on the second substrate 201, so that when a plurality of display panels 100 are spliced, a certain space can be left between two adjacent second substrates 201, and the bent portion 212 on the second substrate 201 is prevented from being collided and pressed by the adjacent display panels.

The structure formed after bending the second substrate 201 at its edge is shown in fig. 11.

After the display panel 100 is manufactured, a plurality of display panels 100 are spliced together as shown in fig. 12 and 13 to form a large-sized display screen.

According to the embodiment of the application, the first substrate 101 is arranged on the second substrate 201, the splicing portion 103 on the first substrate 101 is located above the bending portion 212 of the second substrate 201, when the display panels 100 are spliced into a large-size display screen, contact occurs between the first substrates 101 of the display panels 100, because the splicing portion 103 has a certain length, the splicing portion 103 is located above the bending portion of the second substrate 201, when the display panels 100 are combined and spliced, a certain space can be reserved between two adjacent second substrates 201, collision and extrusion of the bending portion 212 on the second substrate 201 by the adjacent display panels are avoided, the problem that metal wires are broken due to the fact that the bending portion 212 is extruded is solved, in addition, splicing and alignment are carried out by utilizing the splicing portion 103, the splicing accuracy is improved, and the splicing difficulty is reduced.

The display panel, the manufacturing method of the display panel and the display screen provided by the application are introduced in detail, specific examples are applied in the description to explain the principle and the implementation of the application, and the description of the above embodiments 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 is characterized by comprising a first substrate, a second substrate and a connecting piece;

the second substrate is provided with a metal wire and comprises a flat part and a bent part, the bent part is positioned on the side edge of the flat part, the flat part is positioned below the body, the bent part is positioned below the splicing part, and the length of the first substrate is greater than that of the flat part on the second substrate;

the second substrate comprises a light emitting piece, the light emitting piece is positioned between the first substrate and the second substrate, and the light emitting piece comprises a plurality of LEDs arranged in an array;

the first substrate comprises a light shading part, the light shading part is located between the first substrate and the light emitting part, a plurality of hollow areas are arranged on the light shading part, and the plurality of hollow areas correspond to the plurality of LEDs arranged in the array one to one.

2. The display panel of claim 1, wherein the length of the stitching portion is not less than the distance between two adjacent LEDs in the plurality of LEDs.

3. The display panel according to claim 1, wherein an area of each of the plurality of hollow-out regions is the same as an area of each of the plurality of arrayed LEDs.

4. The display panel according to claim 1, wherein the length of the joint part is not less than the radius of curvature of the bent part.

5. The display panel of claim 1, wherein the body and the splice are integrally formed.

6. The display panel according to any one of claims 1 to 5, further comprising a support plate located below the flat portion.

7. A display screen, characterized in that the display screen is formed by splicing and combining a plurality of display panels, and the display panel is the display panel of any one of claims 1 to 6.

8. A preparation method of a display panel is characterized by comprising the following steps:

providing a first substrate and a second substrate, wherein the first substrate comprises a light shielding piece with a plurality of hollow areas; the second substrate comprises a light emitting member, and the light emitting member comprises a plurality of LEDs arranged in an array;

attaching the first substrate to the second substrate, and fixing the first substrate and the second substrate by using a connecting piece; the plurality of hollow-out areas correspond to the plurality of LEDs arranged in the array one by one;