Circuit board for display device and display device

Abstract

The utility model provides a circuit board for a display device and the display device. The circuit board for the display device comprises a base material, a first circuit layer and a second circuit layer, wherein the first circuit layer and the second circuit layer are arranged on two sides of the base material; a first ink layer is arranged on one side, deviating from the base material, of the first circuit layer, and a second ink layer is arranged on one side, deviating from the base material, of the second circuit layer; a first resin layer is arranged between the first circuit layer and the base material, and the first resin layer and the first ink layer have the same color system or different color systems. Through the structural design, the circuit board for the display device has uniform color, and particularly, the color difference of the area, except the light source, of the circuit board is avoided or reduced. The display device comprising the circuit board for the display device can present clearer, more accurate and more full colors, so that the display effect is remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit boards, and in particular relates to a circuit board for a display device and a display device. Background Art

[0002] With the continuous development of LED (Light Emitting Diode) display technology, the pixel pitch and display effect of LED display screens have been rapidly improved. With the advent of the 5G era, as an interactive important information display window, LED display screens will be further widely used with their advantages of seamless splicing and large-screen display. Circuit boards are an indispensable part of LED display screens. Circuit boards make circuits miniaturized and intuitive, and play an important role in the mass production and optimized layout of fixed circuits.

[0003] The current display screen is mainly composed of a circuit board and the lamp beads arranged on it. The lamp beads show different colors when they are lit, and the color of the circuit board is between the lamp beads. If the colors at different positions are not uniform, it will cause a large color difference in the overall display of the display screen. Since the colors of the circuit board substrates of different manufacturers are significantly different, and the same color inks of different manufacturers are also different, the problem of circuit board color difference has always existed in the application field of display screens, resulting in a significant decrease in the display effect of the display screen. Therefore, it is an urgent problem to develop a circuit board with low color difference to improve the display effect of the display screen containing it. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a circuit board for a display device and a display device. By arranging a first resin layer structure having the same or different color as the first ink layer between the first circuit layer and the substrate, the circuit board for the display device has a uniform color, reduces or avoids color difference, and enables the display device containing the same to present clearer and more accurate colors, thereby improving the display effect.

[0005] In order to achieve the purpose of this utility model, the utility model adopts the following technical solutions:

[0006] In a first aspect, the utility model provides a circuit board for a display device, comprising a substrate and a first circuit layer and a second circuit layer arranged on both sides of the substrate; a first ink layer is provided on the side of the first circuit layer facing away from the substrate, and a second ink layer is provided on the side of the second circuit layer facing away from the substrate; a first resin layer is provided between the first circuit layer and the substrate, and the first resin layer and the first ink layer have the same color system or different color systems.

[0007] In the circuit board for a display device provided by the present utility model, a first resin layer is disposed between the first circuit layer and the substrate, so that the area in the circuit board not covered by the circuit presents the uniform color of the first resin layer; meanwhile, the first resin layer and the first ink layer have the same or different color systems. After the colors of the first ink layer and the first resin layer are superimposed or reflected, the circuit board for the display device has a uniform color, especially avoiding or reducing the color difference in the area of the circuit board other than the light source (lamp bead). The display device including the circuit board for the display device can present clearer, more accurate and more saturated colors, thereby having a significantly improved display effect.

[0008] The following are the preferred technical solutions of the present utility model, but not limitations to the technical solutions provided by the present utility model. Through the following preferred technical solutions, the objectives and beneficial effects of the present utility model can be better achieved and realized.

[0009] Preferably, the thickness of the first resin layer is 5 - 200 μm, for example, it can be 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 120 μm, 140 μm, 150 μm, 160 μm or 180 μm, as well as the specific point values between the above point values. Due to space limitations and for the sake of simplicity, the present utility model does not exhaustively list the specific point values included in the above range.

[0010] Preferably, a second resin layer is provided between the second circuit layer and the substrate.

[0011] Preferably, the thickness of the second resin layer is 5 - 200 μm, for example, it can be 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 120 μm, 140 μm, 150 μm, 160 μm or 180 μm, as well as the specific point values between the above point values. Due to space limitations and for the sake of simplicity, the present utility model does not exhaustively list the specific point values included in the above range.

[0012] Preferably, the second resin layer and the second ink layer have the same color system or different color systems.

[0013] As a preferred technical solution of the present utility model, a second resin layer is provided between the second circuit layer and the substrate, which has the same or different color systems as the second ink layer, so that the colors on the two surfaces of the circuit board for the display device are more uniform after being superimposed or reflected, reducing the color difference. Moreover, the circuit board has a symmetrical structure, which can reduce warping and has better dimensional stability and reliability.

[0014] Preferably, the first resin layer includes an epoxy resin layer or a polyimide resin layer.

[0015] Preferably, the second resin layer comprises an epoxy resin layer or a polyimide resin layer.

[0016] Preferably, the substrate comprises at least 1 prepreg. For example, the number of prepregs in the substrate can be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 22, 24, 26, 28, or 30, as well as specific point values between the above point values. Due to space limitations and for the sake of simplicity, the present utility model does not exhaustively list the specific point values included in the range.

[0017] Preferably, the prepreg comprises a fiberglass cloth prepreg, a fiberglass paper prepreg, or a wood pulp paper prepreg.

[0018] Preferably, the thickness of the first ink layer is 10 - 50 μm. For example, it can be 12 μm, 14 μm, 15 μm, 16 μm, 18 μm, 20 μm, 22 μm, 24 μm, 25 μm, 28 μm, 30 μm, 32 μm, 34 μm, 35 μm, 38 μm, 40 μm, 42 μm, 45 μm, or 48 μm, as well as specific point values between the above point values. Due to space limitations and for the sake of simplicity, the present utility model does not exhaustively list the specific point values included in the range.

[0019] Preferably, the thickness of the second ink layer is 10 - 50 μm. For example, it can be 12 μm, 14 μm, 15 μm, 16 μm, 18 μm, 20 μm, 22 μm, 24 μm, 25 μm, 28 μm, 30 μm, 32 μm, 34 μm, 35 μm, 38 μm, 40 μm, 42 μm, 45 μm, or 48 μm, as well as specific point values between the above point values. Due to space limitations and for the sake of simplicity, the present utility model does not exhaustively list the specific point values included in the range.

[0020] Preferably, the color of the first ink layer can be white, black, green, blue, or red, and any other feasible color can also be used according to requirements. Further preferably, it is white or black.

[0021] Preferably, the color of the second ink layer can be white, black, green, blue, or red, and any other feasible color can also be used according to requirements. Further preferably, it is white or black.

[0022] In a second aspect, the present utility model provides a display device, which includes a light source and a circuit board for a display device as described in the first aspect.

[0023] Preferably, the display device includes a display screen.

[0024] Preferably, the light source is a lamp bead, which is disposed on the first circuit layer of the circuit board for display devices and is connected to the first circuit layer.

[0025] Preferably, the display device further includes a driving component, which is disposed on the second circuit layer of the circuit board for display devices and is connected to the second circuit layer.

[0026] Compared with the prior art, the present utility model has the following beneficial effects:

[0027] In the circuit board for display devices provided by the present utility model, a first resin layer is disposed between the first circuit layer and the substrate, which has the same color system or a different color system from the first ink layer. Through the structural design, the circuit board for display devices has a uniform color, especially avoiding or reducing the color difference in the area of the circuit board other than the light source (lamp bead). The display device including the circuit board for display devices can present clearer, more accurate and fuller colors, thus having a significantly improved display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the circuit board for display devices in one embodiment;

[0029] Figure 2 is a schematic structural diagram of the circuit board for display devices in another embodiment;

[0030] Figure 3 is a schematic structural diagram of the copper clad laminate in one embodiment;

[0031] Figure 4 is a schematic structural diagram of the display device in one embodiment;

[0032] Figure 5 is a schematic structural diagram of the display device in another embodiment;

[0033] Wherein, 101 - first ink layer, 102 - second ink layer, 201 - first resin layer, 202 - second resin layer, 301 - first circuit layer, 302 - second circuit layer, 400 - substrate, 501 - first copper foil, 502 - second copper foil, 600 - lamp bead, 700 - driving component. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The technical solutions of the present utility model will be further described below through specific embodiments. Those skilled in the art should understand that the embodiments are only for helping to understand the present utility model and should not be construed as specific limitations on the present utility model.

[0035] In the present utility model, features defined with "first" and "second" may explicitly or implicitly include one or more such features, which are used to distinguish and describe features, without order or importance. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0036] In the present utility model, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as a limitation to the present utility model.

[0037] In the present utility model, unless otherwise clearly specified and defined, terms such as "connected", "connected to", "installed", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] The present utility model discovers that the display screen mainly consists of a circuit board and the lamp beads arranged thereon. When the lamp beads are lit, different colors are presented, and the color between the lamp beads is the color of the circuit board. If the colors at different positions are not uniform, it will cause a large color difference in the overall display of the display screen. Due to the obvious differences in the colors of the circuit board substrates of different manufacturers, and the differences in the same-color inks of different manufacturers, there has always been a problem of circuit board color difference in the application field of display screens, resulting in a decline in the display effect of the display screens. In order to reduce the color difference, the industry has proposed a solution of adding an optical isolation layer. For example, in the circuit board disclosed in CN110225651A, an optical isolation layer made of ink material is added between the circuit layer and the ink layer. This process requires changing the processing process of the PCB (Printed Circuit Board), increasing the cost, and there are differences in the thickness between the added optical isolation layer and the copper foil circuit of the circuit layer, with an interface, which brings new factors for color difference generation, resulting in the inability of this solution to solve the color difference problem of the circuit board, and the display effect of the display screen has not been significantly improved.

[0039] To solve the above technical problems, an embodiment of the present utility model provides a circuit board for a display device and a display device including the same. The circuit board for the display device includes a substrate, and a first circuit layer and a second circuit layer provided on both sides of the substrate. A first ink layer is provided on the side of the first circuit layer facing away from the substrate, and a second ink layer is provided on the side of the second circuit layer facing away from the substrate. A first resin layer is provided between the first circuit layer and the substrate, so that the area of the circuit board not covered by the circuit presents the uniform color of the first resin layer. At the same time, the first resin layer and the first ink layer have the same color system or different color systems. After the color of the first ink layer and the color of the first resin layer are superimposed or reflected on each other, the circuit board for the display device has a uniform color, especially avoiding or reducing the color difference in the area of the circuit board other than the light source (lamp bead). The display device including the circuit board for the display device can present clearer, more accurate and fuller colors, thus having a significantly improved display effect.

[0040] In order to make the above objects, features and effects of the present utility model more obvious, the following further describes the present utility model in detail with reference to the drawings and specific embodiments. It should be noted that the drawings of the present utility model are not necessarily drawn according to the actual scale.

[0041] As Figure 1 shown, Figure 1 FIG. is a schematic structural diagram of a circuit board for a display device provided by an embodiment of the present utility model, including a substrate 400, a first circuit layer 301 and a second circuit layer 302; the first circuit layer 301 and the second circuit layer 302 are respectively provided on both sides of the substrate 400; a first ink layer 101 is provided on the side of the first circuit layer 301 facing away from the substrate 400, and a second ink layer 102 is provided on the side of the second circuit layer 302 facing away from the substrate 400; a first resin layer 201 is provided between the first circuit layer 301 and the substrate 400, and the first resin layer 201 and the first ink layer 101 have the same color system or different color systems.

[0042] In the circuit board for the display device, the first resin layer 201 covers substrates 400 from different manufacturers and batches, reducing the influence of substrate color difference on the color difference of the display device (display screen), and making the color of the circuit board uniform. At the same time, the first resin layer 201 and the first ink layer 101 have the same color system or different color systems, and the structures cooperate and act together to further reduce the color difference in the area of the circuit board for the display device other than the light source (lamp bead), so that the colors presented by the display device including the circuit board for the display device are clearer, more accurate and fuller, and have a significantly improved display effect.

[0043] As Figure 2 shown, Figure 2Schematic structural diagram of a circuit board for a display device provided for another embodiment, which includes a substrate 400, a first circuit layer 301, and a second circuit layer 302; the first circuit layer 301 and the second circuit layer 302 are respectively disposed on both sides of the substrate 400; a first ink layer 101 is provided on the side of the first circuit layer 301 facing away from the substrate 400, and a second ink layer 102 is provided on the side of the second circuit layer 302 facing away from the substrate 400; a first resin layer 201 is provided between the first circuit layer 301 and the substrate 400, and the first resin layer 201 and the first ink layer 101 have the same color system or different color systems; a second resin layer 202 is provided between the second circuit layer 302 and the substrate 400.

[0044] In one embodiment, the second resin layer 202 and the second ink layer 102 have the same color system or different color systems; thus, both surfaces of the substrate are covered by the first resin layer 201 and the second resin layer 202, so that both surfaces of the circuit board for the display device have a uniform color, reducing color difference, and the circuit board has a symmetric structure, which can reduce warping and has better dimensional stability and reliability.

[0045] In one embodiment, the thickness of the first resin layer 201 is 5 - 200 μm, for example, it can be 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 120 μm, 140 μm, 150 μm, 160 μm or 180 μm, as well as specific point values between the above point values. Due to space limitations and for the sake of brevity, the present invention does not exhaustively list the specific point values included in the above range.

[0046] In one embodiment, the thickness of the second resin layer 202 is 5 - 200 μm, for example, it can be 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 120 μm, 140 μm, 150 μm, 160 μm or 180 μm, as well as specific point values between the above point values. Due to space limitations and for the sake of brevity, the present invention does not exhaustively list the specific point values included in the above range.

[0047] In one embodiment, the first resin layer 201 and the second resin layer 202 each independently include a resin material and a colorant, so that the insulating portions of the circuit board not covered by the circuits exhibit the required color, reducing the color difference caused by substrates of different colors. At the same time, after matching the corresponding ink layers, the color difference problem of the display device (display screen) is effectively solved fundamentally.

[0048] In one embodiment, the colorant includes a white colorant, a black colorant, a green colorant, a blue colorant, a red colorant, etc., so that the first resin layer 201 and the second resin layer 202 exhibit corresponding colors.

[0049] In one example, the colorant includes a white colorant or a black colorant.

[0050] Exemplarily, the black colorant includes a black dye, a black pigment (such as carbon black), a black color paste, etc., making the resin layer exhibit black.

[0051] In one embodiment, the mass content of the colorant in the first resin layer 201 and the second resin layer 202 is independently 0.1%-50%, for example, it can be 0.5%, 1%, 3%, 5%, 8%, 10%, 12%, 15%, 18%, 20%, 22%, 25%, 28%, 30%, 32%, 35%, 38%, 40%, 42%, 45% or 48%, as well as specific point values between the above point values. Due to space limitations and for the sake of simplicity, the present utility model does not exhaustively list the specific point values included in the range.

[0052] In one embodiment, the first resin layer 201 includes an epoxy resin layer or a polyimide resin layer.

[0053] In one embodiment, the second resin layer 202 includes an epoxy resin layer or a polyimide resin layer.

[0054] According to the type of resin material, the first resin layer 201 and the second resin layer 202 may include an epoxy resin layer and a polyimide resin layer. For the epoxy resin layer, it is obtained by curing an epoxy resin and a curing agent; for the polyimide resin layer, it is obtained by curing a heat-self-curing polyimide resin or its modified product. It should be noted that the materials forming the first resin layer 201 and the second resin layer 202 are materials known in the prior art.

[0055] In one embodiment, the substrate 400 includes at least 1 prepreg, for example, the number of prepregs in the substrate can be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 22, 24, 26, 28, 30 or more, as well as specific point values between the above point values. Due to space limitations and for the sake of simplicity, the present utility model does not exhaustively list the specific point values included in the range.

[0056] In one embodiment, the prepreg includes a glass fiber cloth prepreg, a glass fiber paper prepreg or a wood pulp paper prepreg.

[0057] For an embodiment where the number of prepregs in the base material ≥ 2, multiple (≥ 2) prepregs are laminated in sequence to form the base material; the multiple (≥ 2) prepregs are the same or different, and each independently is a fiberglass cloth prepreg, a fiberglass paper prepreg, or a wood pulp paper prepreg.

[0058] It should be understood that the base material can be insulating, that is, the base material is an insulating base material for carrying the first circuit layer and the second circuit layer; the prepreg forming the substrate can be any one of a fiberglass cloth prepreg (FR-4), a fiberglass paper prepreg (CEM-3) used as a sandwich, or a wood pulp paper prepreg (CEM-1) used as a sandwich.

[0059] In one embodiment, the thickness of the first ink layer 101 is 10 - 50 μm, for example, it can be 12 μm, 14 μm, 15 μm, 16 μm, 18 μm, 20 μm, 22 μm, 24 μm, 25 μm, 28 μm, 30 μm, 32 μm, 34 μm, 35 μm, 38 μm, 40 μm, 42 μm, 45 μm, or 48 μm, as well as the specific point values between the above point values. Due to space limitations and for the sake of simplicity, the present utility model does not exhaustively list the specific point values included in the above range.

[0060] In one embodiment, the thickness of the second ink layer 102 is 10 - 50 μm, for example, it can be 12 μm, 14 μm, 15 μm, 16 μm, 18 μm, 20 μm, 22 μm, 24 μm, 25 μm, 28 μm, 30 μm, 32 μm, 34 μm, 35 μm, 38 μm, 40 μm, 42 μm, 45 μm, or 48 μm, as well as the specific point values between the above point values. Due to space limitations and for the sake of simplicity, the present utility model does not exhaustively list the specific point values included in the above range.

[0061] In one embodiment, the color of the first ink layer can be white, black, green, blue, or red, and any other feasible color can also be adopted according to requirements.

[0062] In one embodiment, the color of the first ink layer is white or black.

[0063] In one embodiment, the color of the second ink layer can be white, black, green, blue, or red, and any other feasible color can also be adopted according to requirements.

[0064] In one embodiment, the color of the second ink layer is white or black.

[0065] In one embodiment, the first ink layer and the second ink layer each independently include a photocurable ink layer or a thermosetting ink layer.

[0066] In one embodiment, the first circuit layer 301 and the second circuit layer 302 are metal circuit layers, for example, they can be copper circuit layers.

[0067] In one embodiment, the circuit board for a display device is formed by the following method:

[0068] Provide a copper clad laminate, the structural schematic diagram of which is as Figure 3 shown, including a substrate 400 and a first copper foil 501 and a second copper foil 502 disposed on both sides of the substrate 400. A first resin layer 201 is provided between the substrate 400 and the first copper foil 501, and a second resin layer 202 is provided between the substrate 400 and the second copper foil 502;

[0069] Process the first copper foil 501 to form the first circuit layer 301, and process the second copper foil 502 to form the second circuit layer 302;

[0070] Furthermore, a first ink layer 101 and a second ink layer 102 are respectively provided to obtain the circuit board for a display device.

[0071] In the circuit board for a display device, the first copper foil and the second copper foil are processed to form the first circuit layer and the second circuit layer, and the first resin layer and the second resin layer at other positions of the substrate will be exposed. The color of the resin layer covers the color of the substrate, and after being superimposed or reflected with the color of the ink layer, the color difference problem caused by the substrate is reduced, and further the color difference of the display screen is reduced; the first ink layer 101 and the second ink layer 102 are coated on the resin layer and the circuit layer. The first resin layer 201 and the first ink layer 101 can have the same or different color systems, and can further perform color matching and color superimposition or reflection to improve the color uniformity of the circuit board, further reduce the color difference of the display screen, and improve the display effect.

[0072] Exemplarily, the first resin layer 201 can be disposed on the matte surface of the first copper foil 501 by a coating method, and the second resin layer 202 can be disposed on the matte surface of the second copper foil 502 by a coating method, and then laminated with the substrate 400 to form a copper clad laminate.

[0073] Exemplarily, the first circuit layer 301 and the second circuit layer 302 can be made by steps of laminating, exposing, developing, etching, and stripping the corresponding first copper foil 501 and second copper foil 502.

[0074] An embodiment of the present invention also provides a display device, which includes a light source and any circuit board for a display device provided by the embodiment of the present invention.

[0075] In one embodiment, the display device includes a display screen.

[0076] In one embodiment, the light source is a lamp bead, the lamp bead is disposed on the first circuit layer of the circuit board for the display device, and the lamp bead is connected to the first circuit layer.

[0077] In one embodiment, the display device further includes a driving component, the driving component is disposed on the second circuit layer of the circuit board for the display device, and the driving component is connected to the second circuit layer.

[0078] As Figure 4 shown, Figure 4 FIG. 11 is a schematic structural diagram of a display device provided in one embodiment. The lamp bead 600 is disposed on the first circuit layer 301, and the lamp bead 600 is connected to the first circuit layer 301; the driving component 700 is disposed on the second circuit layer 302, and the driving component 700 is connected to the second circuit layer 302; the driving component 700 is connected to the lamp bead 600 through a circuit, and the driving component 700 is used to drive the lamp bead 600 to emit light.

[0079] As Figure 5 shown, Figure 5 FIG. 18 is a schematic structural diagram of a display device provided in another embodiment. The lamp bead 600 is disposed on the first circuit layer 301, and the lamp bead 600 is connected to the first circuit layer 301; the driving component 700 is disposed on the second circuit layer 302, and the driving component 700 is connected to the second circuit layer 302; the driving component 700 is connected to the lamp bead 600 through a circuit, and the driving component 700 is used to drive the lamp bead 600 to emit light.

[0080] Specifically, the base material is provided with a via hole, the side wall of the via hole is provided with hole copper, and the circuit layer is connected to the driving component through the hole copper, so as to realize the connection between the driving component and the lamp bead and drive the lamp bead to emit light.

[0081] In the display device provided by the present invention, during the process of the lamp bead emitting light, since the first resin layer covers the color difference of the base material and performs corresponding color superposition or reflection with the first ink layer 101, the color difference problem caused by the base material and the ink is reduced, so as to maintain the color consistency of the circuit board, and further ensure the color consistency of the display device during the process of the lamp bead emitting light, and achieve an excellent display effect.

[0082] The applicant declares that the present invention uses the above embodiments to illustrate the specific implementation manners of the present invention, but the present invention is not limited to the above implementation manners, that is, it does not mean that the present invention must rely on the above implementation manners to be implemented. Those skilled in the art should understand that any improvement to the present invention, the equivalent replacement of the raw materials and components selected by the present invention, the addition of auxiliary components and components, and the selection of specific manners, etc., all fall within the protection scope and the disclosure scope of the present invention.

Claims

1. A circuit board for a display device, characterized in that: The circuit board for a display device comprises a substrate and a first circuit layer and a second circuit layer arranged on both sides of the substrate; A first ink layer is provided on a side of the first circuit layer facing away from the substrate, and a second ink layer is provided on a side of the second circuit layer facing away from the substrate; A first resin layer is disposed between the first circuit layer and the substrate, and the first resin layer and the first ink layer have the same color system or different color systems.

2. The circuit board for a display device according to claim 1, characterized in that: The thickness of the first resin layer is 5-200 μm.

3. The circuit board for a display device according to claim 1, characterized in that: A second resin layer is provided between the second circuit layer and the substrate, and the thickness of the second resin layer is 5-200 μm.

4. The circuit board for a display device according to claim 3, characterized in that: The second resin layer and the second ink layer have the same color system or different color systems.

5. The circuit board for a display device according to claim 3, characterized in that: The first resin layer is an epoxy resin layer or a polyimide resin layer, and the second resin layer is an epoxy resin layer or a polyimide resin layer.

6. The circuit board for a display device according to claim 1, characterized in that: The substrate comprises at least one prepreg; the prepreg comprises a glass fiber cloth prepreg, a glass fiber paper prepreg or a wood pulp paper prepreg.

7. The circuit board for a display device according to claim 1, characterized in that: The thickness of the first ink layer is 10-50 μm, and the thickness of the second ink layer is 10-50 μm.

8. A display device, characterized in that: The display device comprises a light source and a circuit board for a display device as claimed in any one of claims 1 to 7.

9. The display device according to claim 8, characterized in that: The light source is a lamp bead, which is arranged on the first circuit layer of the circuit board for the display device, and the lamp bead is connected to the first circuit layer.

10. The display device according to claim 9, characterized in that The display device further comprises a driving component, wherein the driving component is arranged on a second circuit layer of the circuit board for the display device, and the driving component is connected to the second circuit layer.

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