A display device and a method for manufacturing the same

Abstract

The present invention discloses a display device and a manufacturing method thereof. The display device includes a display panel, a support layer, a driving circuit layer, a step transition layer and a conductive connecting line; the support layer is located on the side of the display panel away from the light emitting surface; the driving circuit layer is located on the side of the support layer away from the display panel; the step transition layer is located on the step structure formed between the electrode area of ​​the display panel, the support layer and the driving circuit layer; the conductive connecting line is located on the step transition layer, one end of the conductive connecting line is electrically connected to the electrode area of ​​the display panel, and the other end is electrically connected to the driving circuit layer. The present invention supports and protects the conductive connecting line connected between the driving circuit layer and the display panel through the step transition layer, reduces the situation of the conductive connecting line being broken when arranged on the step structure, improves the product yield of the display device, and improves production efficiency.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display device and a manufacturing method thereof. Background Art

[0002] At present, display screens are developing towards extremely narrow bezels. To achieve an extremely narrow bezel, the driving module and the circuit board's binding area are generally set on the back of the display panel. One of the back binding structures is to attach the driving module and the circuit board's pad area to the back of the display panel, and then connect the first surface electrode of the display panel with the driving module and the circuit board's second surface pad area through a conductive connection line.

[0003] However, due to the presence of a step structure between the first surface and the second surface, the conductive connecting wire is prone to breakage at the step structure during manufacture, which affects the product yield of the display device. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a display device and a manufacturing method thereof, which can reduce the phenomenon of bad breakage of conductive connection lines at the step structure.

[0005] To achieve the above object, the present invention first provides a display device, comprising at least:

[0006] Display panel;

[0007] A supporting layer, located on a side of the display panel away from the light emitting surface;

[0008] A driving circuit layer, located on a side of the supporting layer away from the display panel;

[0009] A step transition layer is located on a step structure formed between the electrode area, the support layer and the drive circuit layer of the display panel;

[0010] The conductive connecting line is located on the step transition layer, one end of the conductive connecting line is electrically connected to the electrode area of ​​the display panel, and the other end is electrically connected to the driving circuit layer.

[0011] Optionally, the step transition layer further includes a first contact surface, a second contact surface and a transition surface, the first contact surface is connected to the display panel, the second contact surface is connected to the support layer and the driving circuit layer, and the transition surface is connected to the conductive connecting line.

[0012] Optionally, a first angle between the display panel or the driving circuit layer and the transition surface is smaller than a second angle between the first contact surface and the second contact surface.

[0013] Optionally, the first angle ranges from 20° to 80°.

[0014] Optionally, the cross-sectional shape of the transition surface along the light emitting direction includes a straight line or a curve.

[0015] Optionally, the shape of the conductive connecting line matches the cross-sectional shape of the transition surface.

[0016] Optionally, the material of the step transition layer includes an insulating material, and the step transition layer covers the connection between the driving circuit layer and the conductive connection line.

[0017] The present invention also provides a method for manufacturing a display device, which comprises at least the following steps:

[0018] Providing a display panel, a support layer, a drive circuit layer and conductive connecting wires;

[0019] The support layer and the driving circuit layer are sequentially connected on the side away from the light emitting surface of the display panel, so that a step structure is formed between the electrode area of ​​the display panel, the support layer and the driving circuit layer;

[0020] Adding a step transition layer material to the step structure and curing the step transition layer material to form a step transition layer;

[0021] The conductive connecting wire is arranged on the step transition layer, and one end of the conductive connecting wire is electrically connected to the display panel, and the other end is electrically connected to the driving circuit layer.

[0022] Optionally, after the step of providing a display panel, a support layer, a drive circuit layer and a conductive connection line, the method further includes:

[0023] The display panel, the support layer and the driving circuit layer are tilted at a certain angle at the same time.

[0024] Optionally, the display panel, the support layer and the driving circuit layer have an inclination angle of 30° to 60°.

[0025] Compared with the prior art, the beneficial effects of the present invention include: the display device of the present invention includes a display panel, a support layer, a driving circuit layer, a step transition layer and a conductive connecting line; the support layer is located on the side of the display panel away from the light emitting surface; the driving circuit layer is located on the side of the support layer away from the display panel; the step transition layer is located on the step structure formed between the electrode area of ​​the display panel, the support layer and the driving circuit layer; the conductive connecting line is located on the step transition layer, one end of the conductive connecting line is electrically connected to the electrode area of ​​the display panel, and the other end is electrically connected to the driving circuit layer. The present invention supports and protects the conductive connecting line connected between the driving circuit layer and the display panel through the step transition layer, reduces the situation of the conductive connecting line being broken when arranged on the step structure, improves the product yield of the display device, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 is a side cross-sectional view of a prior art display device;

[0028] Figure 2 is a side cross-sectional view of a display device according to an embodiment of the present invention Figure 1 ;

[0029] Figure 3 is a side cross-sectional view of a display device according to an embodiment of the present invention Figure 2 ;

[0030] Figure 4 is a top view of the structure of a display device in the prior art;

[0031] Figure 5 is a top view of the structure of a display device according to an embodiment of the present invention;

[0032] Figure 6 1 is a step diagram of a method for manufacturing a display device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments of the present invention that can be implemented. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the module or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The present invention is specifically introduced and explained below.

[0035] like Figure 1 As shown, in the existing narrow-frame display device, there is generally a step structure at the junction of the electrode area of ​​the display panel 101 and the driving circuit layer 102, and the conductive connection line 103 arranged at the step structure is prone to breakage and poor conductivity.

[0036] Therefore, an embodiment of the present invention provides a display device, such as Figure 2 As shown, the display device includes a display panel 1, a support layer 2, a driving circuit layer 3, a step transition layer 4 and a conductive connecting line 5; the support layer 2 is located on the side of the display panel 1 away from the light emitting surface; the driving circuit layer 3 is located on the side of the supporting layer 2 away from the display panel 1; the step transition layer 4 is located on the step structure formed between the electrode area 11 of the display panel 1, the support layer 2 and the driving circuit layer 3; the conductive connecting line 5 is located on the step transition layer 4, one end of the conductive connecting line 5 is electrically connected to the electrode area 11 of the display panel 1, and the other end is electrically connected to the driving circuit layer 3.

[0037] The display device of this embodiment supports and protects the conductive connecting wire 5 connected between the driving circuit layer 3 and the display panel 1 through the step transition layer 4, thereby reducing the possibility of breakage of the conductive connecting wire 5 arranged on the step structure, improving the product yield of the display device and enhancing production efficiency.

[0038] In one implementation of the present embodiment, the driving circuit layer 3 specifically includes a driving module 31, a circuit board 32 and a wiring layer 33. The wiring layer 33 is located on the supporting layer 2. The driving module 31 and the circuit board 32 are located on the wiring layer 33. A pad area 34 is formed at the edge of the wiring layer 33. One end of the conductive connecting line 5 is electrically connected to the pad area 34, and the other end is electrically connected to the display panel 1. The driving signal of the driving module 31 is transmitted to the display panel 1 through the conductive connecting line 5.

[0039] In one implementation of this embodiment, a plurality of conductive connecting wires 5 are provided, and each conductive connecting wire 5 is spaced a certain distance apart.

[0040] In one implementation of this embodiment, the support layer 2 includes a first support layer 21, a second support layer 22 and a shielding layer 23. The first support layer 21 is located on the back of the display panel 1, the shielding layer 23 is located on the first support layer 21, and the second support layer 22 is located on the shielding layer 23. The first support layer 21 and the second support layer 22 can form a strong support for the display panel 1, thereby improving the strength and toughness of the display panel 1. The shielding layer 23 can block the external water and oxygen from corroding the display panel 1, prevent the water and oxygen from affecting the working state of the display panel 1, and extend the service life of the display panel 1.

[0041] The display panel 1 of the present embodiment includes but is not limited to an LCD display panel, an OLED display panel, a Mini LED display panel and a Micro LED display panel.

[0042] In one implementation of this embodiment, Figure 3 As shown, the step transition layer 4 further includes a first contact surface 41, a second contact surface 42 and a transition surface 43, the first contact surface 41 is connected to the display panel 1, the second contact surface 42 is connected to the support layer 2 and the drive circuit layer 3, and the transition surface 43 is connected to the conductive connection line 5. The conductive connection line 5 is arranged on the transition surface 43, and the transition surface 43 provides good support and protection for the conductive connection line 5, which can reduce the possibility of the conductive connection line 5 being broken.

[0043] In one implementation of this embodiment, the first angle between the display panel 1 or the driving circuit layer 3 and the transition surface 43 is smaller than the second angle between the first contact surface 41 and the second contact surface 42. The second angle is equal to the vertex angle of the step structure, so that the angle at the connection between the conductive connecting line 5 and the display panel 1 and the driving circuit layer 3 is smaller than the vertex angle of the step structure, and the inclination angle of the conductive connecting line 5 is smaller, thereby reducing the possibility of the conductive connecting line 5 being broken.

[0044] In one implementation of this embodiment, the first angle is in a range of 20° to 80°, which allows the transition surface 43 to have an inclination angle within a reasonable and moderate range, thereby preventing the transition surface 43 from having an inclination angle that is too large, thereby reducing the protection and support for the conductive connecting wire 5.

[0045] In one implementation of this embodiment, the cross-sectional shape of the transition surface 43 along the light-emitting direction includes a straight line or a curve, so that the step transition layer 4 can better protect and support the conductive connection line 5 .

[0046] Specifically, when the cross-sectional shape of the transition surface 43 is a straight line, the cross-sectional shape of the corresponding step transition layer 4 is a triangle. The triangular structure can make the step transition layer 4 have a higher strength.

[0047] When the cross-sectional shape of the transition surface 43 is a curve, such as an arc shape that bends outward, the cross-sectional shape of the corresponding step transition layer 4 is a fan shape. Furthermore, the curve can also be an arc that bends inward. The conductive connecting wire 5 is arranged along the arc, which can also reduce the risk of bending and breaking.

[0048] In one implementation of this embodiment, the shape of the conductive connection line 5 matches the cross-sectional shape of the transition surface 43. For example, when the cross-sectional shape of the transition surface 43 is a straight line, the shape of the conductive connection line 5 is also a straight line. When the cross-sectional shape of the transition surface 43 is an arc, the shape of the conductive connection line 5 is also an arc, and the curvature of the conductive connection line 5 is similar to the curvature of the transition surface 43. In this way, the conductive connection line 5 can be more firmly attached to the transition surface 43, further reducing the possibility of the conductive connection line 5 breaking.

[0049] In the prior art, such as Figure 4 As shown, the edges of the driving circuit layer 102 and the supporting layer are generally cut by laser cutting, and the cut will be carbonized by the laser to form a carbonized part A. The carbonized part A will have a certain conductivity. Therefore, the carbonized part A will make the conductive connecting lines 103 conductive to each other, affecting the normal operation of the display panel 101.

[0050] Based on the above problems, in the embodiment of the present invention, the material of the step transition layer 4 includes an insulating material B, such as epoxy resin, acrylic resin or other materials with insulating properties. Figure 5 As shown, the insulating material B of the step transition layer 4 covers the connection between the driving circuit layer 3 and the conductive connecting wire 5, so that the insulating material B covers the carbonized part of the cutout of the driving circuit layer 3, so that the conductive connecting wires 5 will not be connected by the carbonized part.

[0051] In this embodiment, the display device further includes a protective cover plate 6, which is located on the light emitting surface side of the display panel 1, and the protective cover plate 6 is connected to the display panel 1 through an optical adhesive layer 7. Specifically, the protective cover plate 6 can be a glass cover plate with high hardness, and the material of the optical adhesive layer 7 is transparent optical adhesive, and its light transmittance is above 90%.

[0052] The embodiment of the present invention also provides a method for manufacturing a display device, which is used to manufacture the display device provided by the above embodiment. Figure 6 As shown, the display device manufacturing method includes step 201, step 202, step 203 and step 204. The details are as follows:

[0053] Step 201 , providing a display panel 1 , a support layer 2 , a driving circuit layer 3 and conductive connecting lines 5 .

[0054] Step 202 , sequentially connect the support layer 2 and the driving circuit layer 3 on the side away from the light emitting surface of the display panel 1 , so as to form a step structure between the electrode area 11 of the display panel 1 , the support layer 2 and the driving circuit layer 3 .

[0055] Step 203, adding a step transition layer material to the step structure, and curing the step transition layer material to form a step transition layer 4. The step transition layer material may include epoxy resin, acrylic resin or other materials with insulating properties. Specifically, the step transition layer material may be cured by light curing, moisture curing, heat curing, etc.

[0056] Step 204 , laying out the conductive connection line 5 on the step transition layer 4 , and electrically connecting one end of the conductive connection line 5 to the electrode region 11 of the display panel 1 , and electrically connecting the other end to the driving circuit layer 3 .

[0057] In one implementation of this embodiment, a protective cover plate 6 may be further provided, and an optical adhesive layer 7 is formed between the light emitting surface of the display panel 1 and the protective cover plate 6 , so that the protective cover plate 6 and the display panel 1 are firmly connected via the optical adhesive layer 7 .

[0058] In one implementation of this embodiment, after step S1, the following steps are further included:

[0059] The display panel 1, the support layer 2 and the driving circuit layer 3 are tilted at a certain angle at the same time. The tilt angles of the display panel 1, the support layer 2 and the driving circuit layer 3 are 30° to 60°, and in this embodiment, the tilt angle can be selected as 45°. In this way, the step structure can also be tilted, which is convenient for adding the step transition layer material (such as photosensitive adhesive) to form the step transition layer 4.

[0060] Specifically, the display panel 1, the support layer 2 and the driving circuit layer 3 can be first placed on a horizontal plane. After the three are initially formed into a display module, the display module is tilted, and then the display module is fixed on a tilting mechanism. The tilt angle of the tilting structure can be 45°. Finally, the step transition layer material is added to the step structure.

[0061] The display device provided by the above embodiment can be manufactured by the display device manufacturing method provided by the present embodiment. The display device includes a display panel 1, a support layer 2, a driving circuit layer 3, a step transition layer 4 and a conductive connection line 5; the support layer 2 is located on the side of the display panel 1 away from the light emitting surface; the driving circuit layer 3 is located on the side of the support layer 2 away from the display panel 1; the step transition layer 4 is located on the step structure formed between the display panel 1, the support layer 2 and the driving circuit layer 3; the conductive connection line 5 is located on the step transition layer 4, one end of the conductive connection line 5 is electrically connected to the display panel 1, and the other end is electrically connected to the driving circuit layer 3.

[0062] Specifically, the step transition layer 4 also includes a first contact surface 41, a second contact surface 42 and a transition surface 43, the first contact surface 41 is connected to the display panel 1, the second contact surface 42 is connected to the support layer 2 and the drive circuit layer 3, and the transition surface 43 is connected to the conductive connection line 5. The first angle between the display panel 1 or the drive circuit layer 3 and the transition surface 43 is smaller than the second angle between the first contact surface 41 and the second contact surface 42. The value range of the first angle is 20° to 80°. The cross-sectional shape of the transition surface 43 along the light-emitting direction includes a straight line or a curve. In this way, the step transition layer 4 can better protect and support the conductive connection line 5. When the cross-sectional shape of the transition surface 43 is a straight line, the cross-sectional shape of the corresponding step transition layer 4 is a triangle. The triangular structure can make the step transition layer 4 have a higher strength. When the cross-sectional shape of the transition surface 43 is a curve, such as an outwardly curved arc, the cross-sectional shape of the corresponding step transition layer 4 is a fan-shaped. Further, the curve can also be an inwardly curved arc. The shape of the conductive connection line 5 matches the cross-sectional shape of the transition surface 43. For example, when the cross-sectional shape of the transition surface 43 is a straight line, the shape of the conductive connection line 5 is also a straight line. When the cross-sectional shape of the transition surface 43 is an arc, the shape of the conductive connection line 5 is also an arc, and the curvature of the conductive connection line 5 is similar to the curvature of the transition surface 43. The material of the step transition layer 4 includes an insulating material, such as epoxy resin, acrylic resin or other materials with insulating properties. The step transition layer 4 covers the connection between the driving circuit layer 3 and the conductive connection line 5.

[0063] Further, the display device also includes a protective cover plate 6, which is located on the light-emitting side of the display panel 1, and the protective cover plate 6 is connected to the display panel 1 through an optical adhesive layer 7. The driving circuit layer 3 specifically includes a driving module 31, a circuit board 32 and a wiring layer 33, the wiring layer 33 is located on the support layer 2, the driving module 31 and the circuit board 32 are located on the wiring layer 33, a pad area is formed at the edge of the wiring layer 33, one end of the conductive connecting wire 5 is electrically connected to the pad area, and the other end is electrically connected to the display panel 1, and the driving signal of the driving module 31 is transmitted to the display panel 1 through the conductive connecting wire 5. There are multiple conductive connecting wires 5, and each conductive connecting wire 5 is spaced a certain distance apart. The supporting layer 2 includes a first supporting layer 21, a second supporting layer 22 and a shielding layer 23. The first supporting layer 21 is located on the back of the display panel 1, the shielding layer 23 is located on the first supporting layer 21, and the second supporting layer 22 is located on the shielding layer 23.

[0064] The display device of this embodiment supports and protects the conductive connecting wire 5 connected between the driving circuit layer 3 and the display panel 1 through the step transition layer 4, thereby reducing the possibility of breakage of the conductive connecting wire 5 arranged on the step structure, improving the product yield of the display device and enhancing production efficiency.

[0065] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A display device, characterized in that: At least: Display panel; A supporting layer, located on a side of the display panel away from the light emitting surface; A driving circuit layer, located on a side of the supporting layer away from the display panel; a step transition layer, located on a step structure formed between the electrode region of the display panel, the support layer and the drive circuit layer; A conductive connecting line, located on the step transition layer, wherein one end of the conductive connecting line is electrically connected to the electrode region of the display panel, and the other end of the conductive connecting line is electrically connected to the driving circuit layer; The step transition layer also includes a first contact surface, a second contact surface and a transition surface, the first contact surface is connected to the display panel, the second contact surface is connected to the support layer and the drive circuit layer, the conductive connecting line is arranged on the transition surface, and a first angle between the display panel or the drive circuit layer and the transition surface is smaller than a second angle between the first contact surface and the second contact surface, and the second angle is equal to the top angle of the step structure.

2. The display device according to claim 1, characterized in that The first angle has a value range of 20° to 80°.

3. The display device according to claim 1, characterized in that The cross-sectional shape of the transition surface along the light emitting direction includes a straight line or a curve.

4. The display device according to claim 3, characterized in that: The shape of the conductive connecting line matches the cross-sectional shape of the transition surface.

5. The display device according to any one of claims 1 to 4, characterized in that: The material of the step transition layer includes an insulating material, and the step transition layer covers the connection between the driving circuit layer and the conductive connection line.

6. A method for manufacturing a display device, characterized in that: At least: Providing a display panel, a support layer, a drive circuit layer and conductive connecting wires; The support layer and the drive circuit layer are sequentially connected on a side away from the light emitting surface of the display panel, so that a step structure is formed between the electrode area of ​​the display panel, the support layer and the drive circuit layer; Adding a step transition layer material to the step structure, and curing the step transition layer material to form a step transition layer; The conductive connecting wire is arranged on the step transition layer, and one end of the conductive connecting wire is electrically connected to the electrode area of ​​the display panel, and the other end is electrically connected to the driving circuit layer; Among them, the step transition layer also includes a first contact surface, a second contact surface and a transition surface, the first contact surface is connected to the display panel, the second contact surface is connected to the support layer and the driving circuit layer, the conductive connecting line is arranged on the transition surface, and the first angle between the display panel or the driving circuit layer and the transition surface is smaller than the second angle between the first contact surface and the second contact surface, and the second angle is equal to the top angle of the step structure.

7. The method for manufacturing a display device according to claim 6, wherein: After the step of providing a display panel, a support layer, a drive circuit layer and a conductive connection line, the method further includes: The display panel, the support layer and the driving circuit layer are tilted at a certain angle at the same time.

8. The method for manufacturing a display device according to claim 7, wherein: The display panel, the support layer and the driving circuit layer have an inclination angle of 30° to 60°.

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