Color film substrate, manufacturing method thereof, display panel and display device

Abstract

The invention provides a color film substrate, a manufacturing method of the color film substrate, a display panel and a display device. The color film layer is positioned on the first side of the substrate; the electromagnetic shielding layer is positioned on the second side of the substrate base plate; the insulating layer is positioned on one side, far away from the substrate, of the electromagnetic shielding layer; the touch electrode layer is located on the side, away from the substrate, of the insulating layer. According to the color film substrate, the electromagnetic shielding layer and the touch electrode layer are formed on the surface of the color film substrate, so that the product thickness is reduced.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of display devices, and in particular to a color film substrate and a manufacturing method thereof, a display panel, and a display device. Background Art

[0002] Based on Sekunov's electromagnetic shielding theory, the electromagnetic shielding effectiveness of materials is closely related to physical parameters such as electromagnetic wave frequency, material thickness, relative magnetic permeability, relative electrical conductivity, and the distance between the field source and the shielding material. In general, the thicker the material, the greater the electrical conductivity, the greater the magnetic permeability, the higher the electromagnetic wave frequency, and the higher the electromagnetic shielding effectiveness of the material. Therefore, the main idea of ​​studying electromagnetic shielding glass at present is: using glass materials with good optical transparency (such as fused quartz glass, organic glass, etc.) as the substrate, preparing a structure with high electrical conductivity or high magnetic permeability on the surface, and giving it an electromagnetic shielding function in a specific band without affecting the optical transmittance. Electromagnetic shielding glass can be divided into three categories according to the structural type: film layer structure, grid structure, and composite structure. All three types of products require an additional functional layer to be attached above the liquid crystal display (LCD) product.

[0003] However, fields such as aircraft are extremely sensitive to product weight and attach increasing importance to reducing product weight. Oncell (touch sensors on LCD panels) technology has been widely used in consumer electronics as a means to reduce the weight of mobile phones and tablets. However, aviation products have high requirements for electromagnetic compatibility performance to ensure flight safety due to the high density of electronic equipment in the cabin and high requirements for communication quality. Oncell touch technology has high electromagnetic compatibility performance and product weight reduction, which is not easy to achieve at the same time, and is not accepted by aviation customers. Summary of the invention

[0004] The embodiments of the present invention provide a color film substrate and a manufacturing method thereof, a display panel and a display device, so as to solve the problem that the existing products have poor electromagnetic shielding function and cannot be widely used.

[0005] In order to solve the above-mentioned technical problems, the present invention is achieved as follows:

[0006] In a first aspect, an embodiment of the present invention provides a color filter substrate, including:

[0007] substrate substrate;

[0008] A color filter layer, the color filter layer is located on the first side of the base substrate;

[0009] An electromagnetic shielding layer, the electromagnetic shielding layer is located on the second side of the substrate;

[0010] an insulating layer, the insulating layer being located on a side of the electromagnetic shielding layer away from the substrate;

[0011] A touch electrode layer is located on a side of the insulating layer away from the base substrate.

[0012] Optionally, the electromagnetic shielding layer is a transparent conductive material coating; the electromagnetic shielding layer is a whole-surface coating or a grid-pattern coating;

[0013] or,

[0014] The electromagnetic shielding layer is a metal material coating; the electromagnetic shielding layer is a grid pattern coating.

[0015] Optionally, the electromagnetic shielding layer is reused as a common electrode.

[0016] Optionally, the square resistance of the electromagnetic shielding layer is set to 5-7Ω.

[0017] In a second aspect, an embodiment of the present invention provides a display panel, including:

[0018] An array substrate;

[0019] The color film substrate described in any one of the first aspects, wherein the color film substrate is arranged opposite to the array substrate;

[0020] The liquid crystal layer is located between the color filter substrate and the array substrate.

[0021] In a third aspect, an embodiment of the present invention provides a display device, including:

[0022] A display housing, a backlight source and a display panel as described in the second aspect;

[0023] The display housing is a cavity with an opening at one end, and the backlight source and the display panel are arranged in the display housing;

[0024] The backlight source is arranged at the bottom of the display housing;

[0025] The display panel is arranged on a side of the backlight source away from the bottom of the display housing, and a surface of the touch electrode layer on the color film substrate of the display panel away from the backlight source is exposed through an opening of the display housing;

[0026] A conductive foam is disposed on a side of the display panel away from the backlight source, and the display panel is connected to the display housing through the conductive foam.

[0027] Optionally, the conductive foam is arranged on the surfaces of both ends of the electromagnetic shielding layer of the color film substrate on a side away from the backlight source.

[0028] Optionally, the display housing is made of metal.

[0029] In a fourth aspect, an embodiment of the present invention provides a method for manufacturing a color filter substrate, comprising:

[0030] Providing a substrate;

[0031] Manufacturing a color filter layer on the first side of the substrate;

[0032] fabricating an electromagnetic shielding layer on the second side of the substrate;

[0033] Making an insulating layer on a side of the electromagnetic shielding layer away from the substrate;

[0034] A touch electrode layer is formed on a side of the insulating layer away from the base substrate.

[0035] Optionally, the electromagnetic shielding layer is a transparent conductive material coating; the electromagnetic shielding layer is a whole-surface coating or a grid-pattern coating;

[0036] or,

[0037] The electromagnetic shielding layer is a metal material coating; the electromagnetic shielding layer is a grid pattern coating.

[0038] In the present invention, an electromagnetic shielding layer is plated on the panel surface of the color film layer, and then an insulating layer and a touch electrode layer are made on the electromagnetic shielding layer, so as to reduce the product thickness and realize electromagnetic shielding of the Oncell product, thereby solving the problem that the existing products have poor electromagnetic shielding function and cannot be widely used. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0040] Figure 1 It is a structural schematic diagram of a color filter substrate provided by an embodiment of the present invention;

[0041] Figure 2 It is a schematic structural diagram of an electromagnetic shielding layer pattern coating provided by an embodiment of the present invention;

[0042] Figure 3 is a schematic structural diagram of another electromagnetic shielding layer pattern coating provided by an embodiment of the present invention;

[0043] Figure 4 It is a schematic structural diagram of another electromagnetic shielding layer pattern coating provided by an embodiment of the present invention;

[0044] Figure 5 is a schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0045] Figure 6 is a structural schematic diagram of a display device provided by an embodiment of the present invention;

[0046] Figure 7 is a schematic diagram of an electrostatic decoupling structure of a display device provided by an embodiment of the present invention;

[0047] Figure 8 The present invention provides a flowchart of a method for manufacturing a color filter substrate. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] Please refer to Figure 1 The embodiment of the present invention provides a color film substrate 01, including:

[0050] Base substrate 1;

[0051] A color filter layer 2, the color filter layer 2 is located on a first side of the base substrate 1;

[0052] An electromagnetic shielding layer 3, the electromagnetic shielding layer 3 is located on the second side of the substrate 1;

[0053] An insulating layer 4, the insulating layer 4 is located on a side of the electromagnetic shielding layer 3 away from the substrate 1;

[0054] The touch electrode layer 5 is located on a side of the insulating layer 4 away from the base substrate 1 .

[0055] In the embodiment of the present invention, the base substrate 1 is the basic part of the color filter substrate 01 , and the base substrate 1 provides support and foundation for other parts of the display panel.

[0056] In the embodiment of the present invention, the color filter layer 2 includes: an R filter unit, a G filter unit and a B filter unit. The color filter layer 2 adjusts the propagation of light, enhances the contrast and color saturation, provides rich colors and patterns, and makes the substrate more visually attractive.

[0057] In some embodiments, optionally, the electromagnetic shielding layer 3 is a transparent conductive material coating; the electromagnetic shielding layer is a whole-surface coating or a grid-pattern coating;

[0058] In some embodiments, optionally, the electromagnetic shielding layer is a metal material coating; the electromagnetic shielding layer is a grid pattern coating.

[0059] Specifically, the transparent conductive material coating can use indium tin oxide (ITO) transparent electrode; the metal material coating can use aluminum (Al), copper (Cu), silver (Ag) and gold (Au) and other metals, wherein the electromagnetic shielding layer 3 can be set as a whole surface coating or a grid pattern coating when the transparent conductive material coating is used; the electromagnetic shielding layer can be set as a grid pattern coating when the metal material coating is used; the specific grid pattern scheme includes existing periodic regular grids and random grids, and the specific shielding grid pattern top view includes but is not limited to the following Figure 2-4 The scheme shown in .

[0060] In some embodiments, optionally, the electromagnetic shielding layer 3 is reused as a common electrode, thereby reducing one film layer and further reducing the thickness of the color filter substrate.

[0061] In some embodiments, optionally, the square resistance of the electromagnetic shielding layer 3 is set to 5-7Ω.

[0062] Specifically, taking transparent conductive material coating as an example, an ITO layer of about 300nm is plated on the entire upper surface of the substrate as a shielding layer to ensure that the square resistance of the electromagnetic shielding layer 3 is set to 5-7Ω, optimally 6Ω, and the transmittance is 80%, thereby better achieving the shielding effect.

[0063] In the embodiment of the present invention, the insulating layer 4 prevents current leakage and short circuit, ensuring the normal operation and stability of the display panel; and can reduce electromagnetic interference and radio frequency interference, ensure the integrity of the signal, and improve the display effect; it can also prevent moisture, dust and other external substances from invading the internal circuit, thereby protecting circuit components and extending the service life of the display panel, and provides good thermal insulation performance to help control the temperature of the display panel and prevent overheating, thereby improving performance and reliability.

[0064] In an embodiment of the present invention, the touch electrode layer 5 is used to sense the user's touch input, and identify the position and intensity of the touch event by detecting the voltage change or current change between the electrodes, thereby achieving accurate user input and interaction; the touch electrode layer 5 converts the touch signal into an electronic signal for transmission to a controller or processor for further processing. The touch electrode layer 5 can be designed to support multi-touch function, allowing the user to perform multiple touch operations at the same time, such as gestures such as zooming and rotating, thereby improving the aesthetics and functionality of the overall device and enhancing the user experience.

[0065] In an embodiment of the present invention, an electromagnetic shielding layer is plated on the panel surface of the color film layer, and then an insulating layer and a touch electrode layer are made on the electromagnetic shielding layer, so as to reduce the thickness of the product and realize electromagnetic shielding of the Oncell product, thereby solving the problem that the existing products have poor electromagnetic shielding function and cannot be widely used.

[0066] Please refer to Figure 5 , an embodiment of the present invention provides a display panel 02, including:

[0067] An array substrate 6;

[0068] Figure 1 The color filter substrate 01 is arranged opposite to the array substrate 6;

[0069] The liquid crystal layer 7 is located between the color filter substrate 01 and the array substrate 6 .

[0070] In the embodiment of the present invention, the color filter substrate 01 and the array substrate 6 are aligned to form a display panel 02. The liquid crystal layer 7 adjusts the passage of light. The liquid crystal layer 7 includes liquid crystal molecules. The liquid crystal molecules change their arrangement under the action of the electric field, thereby changing the polarization state of the light and the intensity of the light passing through the liquid crystal layer. The liquid crystal molecules cooperate with the color filter substrate 01 to generate a full-color image by adjusting light of different colors, so that the display can present rich colors.

[0071] Please refer to Figure 6 , an embodiment of the present invention provides a display device 03, including:

[0072] Display housing 8, backlight source 9 and Figure 5 Display panel 02 in;

[0073] The display housing 8 is a cavity with an opening at one end, and the backlight source 9 and the display panel 02 are arranged in the display housing 8;

[0074] The backlight source 9 is arranged at the bottom of the display housing 8;

[0075] The display panel 02 is disposed on a side of the backlight source 9 away from the bottom of the display housing 8, and a surface of the touch electrode layer 5 on the color film substrate 01 of the display panel 02 away from the backlight source 9 is exposed through an opening of the display housing 8;

[0076] A conductive foam 10 is disposed on a side of the display panel 02 away from the backlight source 9 , and the display panel 02 is connected to the display housing 8 via the conductive foam 10 .

[0077] In some embodiments, optionally, the conductive foam 10 is disposed on the surfaces of both ends of the electromagnetic shielding layer 3 of the color filter substrate 01 on a side away from the backlight source 9 .

[0078] In some embodiments, optionally, the display housing is made of metal.

[0079] Specifically, the conductive foam 10 is arranged on the two end surfaces of the electromagnetic shielding layer 3 of the color film substrate 01 away from the backlight source 9, and the electromagnetic shielding layer 3 and the metal structure on the display housing 8 are connected through the conductive foam. By adjusting the size of the distance from the effective display area, the conductive foam 10 and the color film substrate 01 have a sufficient electromagnetic contact area for conduction, and the static electricity on the surface of the color film substrate 01 can be directly discharged after the conductive foam 10 is connected to the ground wire of the display housing 8, such as Figure 7 As shown, the traditional design avoids the problem that the color film substrate can only be connected to the array substrate through silver paste points and then led out through the display housing, which simplifies the process flow, improves the production efficiency and reduces the production cost.

[0080] Please refer to Figure 1 and Figure 8 The embodiment of the present invention provides a method for manufacturing a color film substrate, comprising:

[0081] Step 81: providing a substrate 1;

[0082] In the embodiment of the present invention, the base substrate 1 is the basic part of the color filter substrate 01, and the base substrate 1 provides support and foundation for other parts of the display panel.

[0083] Step 82: forming a color filter layer 2 on the first side of the base substrate 1;

[0084] In an embodiment of the present invention, the color filter layer 2 includes: an R filter unit, a G filter unit and a B filter unit, which respectively represent red, green and blue sub-pixels. The color filter layer 2 adjusts the propagation of light, enhances the contrast and color saturation, provides rich colors and patterns, and makes the substrate more visually attractive.

[0085] Step 83: fabricating an electromagnetic shielding layer on the second side of the substrate;

[0086] In some embodiments, optionally, the electromagnetic shielding layer 3 is a transparent conductive material coating; the electromagnetic shielding layer is a whole-surface coating or a grid-pattern coating;

[0087] or,

[0088] The electromagnetic shielding layer is a metal material coating; the electromagnetic shielding layer is a grid pattern coating.

[0089] Specifically, the transparent conductive material coating can use indium tin oxide (ITO) transparent electrode; the metal material coating can use aluminum (Al), copper (Cu), silver (Ag) and gold (Au) and other metals, wherein the electromagnetic shielding layer 3 can be set as a whole surface coating or a grid pattern coating when the transparent conductive material coating is used; the electromagnetic shielding layer can be set as a grid pattern coating when the metal material coating is used; the specific grid pattern scheme includes existing periodic regular grids and random grids, and the specific shielding grid pattern top view includes but is not limited to the following Figure 2-4 The scheme shown in .

[0090] In some embodiments, optionally, the electromagnetic shielding layer 3 is reused as a common electrode.

[0091] In some embodiments, optionally, the square resistance of the electromagnetic shielding layer 3 is set to 5-7Ω.

[0092] Specifically, taking transparent conductive material coating as an example, an ITO layer of about 300nm is plated on the entire upper surface of the substrate as a shielding layer to ensure that the square resistance of the electromagnetic shielding layer 3 is set to 5-7Ω, optimally 6Ω, and the transmittance is 80%, thereby better achieving the shielding effect.

[0093] Step 84: forming an insulating layer on a side of the electromagnetic shielding layer away from the substrate;

[0094] In the embodiment of the present invention, the insulating layer 4 prevents current leakage and short circuit, ensuring the normal operation and stability of the display panel; and can reduce electromagnetic interference and radio frequency interference, ensure the integrity of the signal, and improve the display effect; it can also prevent moisture, dust and other external substances from invading the internal circuit, thereby protecting circuit components and extending the service life of the display panel, and provides good thermal insulation performance to help control the temperature of the display panel and prevent overheating, thereby improving performance and reliability.

[0095] Step 85: forming a touch electrode layer on a side of the insulating layer away from the base substrate.

[0096] In an embodiment of the present invention, the touch electrode layer 5 is used to sense the user's touch input, and identify the position and intensity of the touch event by detecting the voltage change or current change between the electrodes, thereby achieving accurate user input and interaction; the touch electrode layer 5 converts the touch signal into an electronic signal for transmission to a controller or processor for further processing. The touch electrode layer 5 can be designed to support multi-touch function, allowing the user to perform multiple touch operations at the same time, such as gestures such as zooming and rotating, thereby improving the aesthetics and functionality of the overall device and enhancing the user experience.

[0097] In an embodiment of the present invention, an electromagnetic shielding layer is plated on the panel surface of the color film layer, and then an insulating layer and a touch electrode layer are made on the electromagnetic shielding layer, so as to reduce the thickness of the product and realize electromagnetic shielding of the Oncell product, thereby solving the problem that the existing products have poor electromagnetic shielding function and cannot be widely used.

[0098] Unless otherwise specified, spatial descriptions such as "above", "below", "upward", "left", "right", "downward", "top", "bottom", "vertical", "horizontal", "side", "above", "below", "upper", "above", "below" are relative to the orientation shown in the drawings. It should be understood that the spatial descriptions used herein are for illustrative purposes only, and actual embodiments of the structures described herein may be spatially arranged in any orientation or manner, with the limitation that the advantages of the embodiments of the present application are not deviated by such arrangements.

[0099] As used herein, the term "vertical" is used to refer to an upward and downward direction, while the term "horizontal" refers to a direction transverse to the vertical direction.

[0100] As used herein, the terms "approximately," "substantially," "substantially," and "about" are used to describe and explain small variations. When used in conjunction with an event or circumstance, the terms may refer to instances where the event or circumstance occurred precisely as well as instances where the event or circumstance occurred very approximately. For example, when used in conjunction with a numerical value, the terms may refer to a range of variation of less than or equal to ±10% of the numerical value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to ±3%, less than or equal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%, less than or equal to ±0.1%, or less than or equal to ±0.05%. For example, if a first numerical value is within a range of variation of less than or equal to ±10% of a second numerical value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to ±3%, less than or equal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%, less than or equal to ±0.1%, or less than or equal to ±0.05%, then the first numerical value may be considered to be "substantially" the same as or equal to the second numerical value. For example, "substantially" vertical may refer to an angular variation range of less than or equal to ±10° relative to 90°, such as less than or equal to ±5°, less than or equal to ±4°, less than or equal to ±3°, less than or equal to ±2°, less than or equal to ±1°, less than or equal to ±0.5°, less than or equal to ±0.1°, or less than or equal to ±0.05°.

[0101] Two surfaces are considered coplanar or substantially coplanar if the displacement between them is no more than 5 μm, no more than 2 μm, no more than 1 μm, or no more than 0.5 μm. A surface is considered substantially flat if the displacement between the highest point and the lowest point of the surface is no more than 5 μm, no more than 2 μm, no more than 1 μm, or no more than 0.5 μm.

[0102] As used herein, the singular terms "a," "an," and "the" may include plural referents unless the context clearly dictates otherwise.

[0103] As used herein, the terms "conductive," "electrically conductive," and "conductivity" refer to the ability to carry an electric current. Conductive materials generally refer to those materials that present little or no resistance to the flow of electric current. One measure of conductivity is Siemens per meter (S / m). Typically, a conductive material is a material with a conductivity greater than about 104 S / m (such as at least 105 S / m or at least 106 S / m). The conductivity of a material can sometimes vary with temperature. Unless otherwise specified, the conductivity of a material is measured at room temperature.

[0104] In addition, amounts, ratios and other numerical values ​​are sometimes presented herein in a range format. It should be understood that such a range format is used for convenience and brevity, and should be flexibly interpreted to include not only the values ​​explicitly specified as the limits of the range, but also all individual values ​​or sub-ranges encompassed within that range, as if each value and sub-range were explicitly specified.

[0105] Although the present application has been described and illustrated with reference to the specific embodiments of the present application, these descriptions and illustrations are not restrictive. It should be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the true spirit and scope of the present application as defined by the appended claims. The illustrations may not necessarily be drawn to scale. Due to manufacturing processes and tolerances, there may be differences between the process reproduction in the present application and the actual equipment. There may be other embodiments of the present application that are not specifically described. This specification and drawings should be regarded as illustrative rather than restrictive. Modifications may be made to make specific situations, materials, material compositions, methods or processes suitable for the goals, spirit and scope of the present application. All such modifications are intended to be within the scope of the appended claims. Although the methods of the application herein have been described with reference to specific operations performed in a specific order, it should be understood that these operations may be combined, subdivided or reordered to form equivalent methods without departing from the teachings of the present application. Accordingly, unless specifically indicated herein, the order and grouping of operations are not limitations of the present application.

Claims

1. A color film substrate, characterized in that: include: substrate substrate; A color filter layer, the color filter layer is located on the first side of the base substrate; An electromagnetic shielding layer, the electromagnetic shielding layer is located on the second side of the substrate; an insulating layer, the insulating layer being located on a side of the electromagnetic shielding layer away from the substrate; A touch electrode layer is located on a side of the insulating layer away from the base substrate.

2. The color film substrate according to claim 1, characterized in that: The electromagnetic shielding layer is a transparent conductive material coating; the electromagnetic shielding layer is a whole-surface coating or a grid-pattern coating; or, The electromagnetic shielding layer is a metal material coating; the electromagnetic shielding layer is a grid pattern coating.

3. The color film substrate according to claim 2, characterized in that: The electromagnetic shielding layer is reused as a common electrode.

4. The color film substrate according to claim 2, characterized in that: The square resistance of the electromagnetic shielding layer is set to 5-7Ω.

5. A display panel, characterized in that: include: An array substrate; The color filter substrate according to any one of claims 1 to 4, wherein the color filter substrate is arranged opposite to the array substrate; The liquid crystal layer is located between the color filter substrate and the array substrate.

6. A display device, characterized in that: include: A display housing, a backlight source and a display panel as claimed in claim 5; The display housing is a cavity with an opening at one end, and the backlight source and the display panel are arranged in the display housing; The backlight source is arranged at the bottom of the display housing; The display panel is arranged on a side of the backlight source away from the bottom of the display housing, and a surface of the touch electrode layer on the color film substrate of the display panel away from the backlight source is exposed through an opening of the display housing; A conductive foam is disposed on a side of the display panel away from the backlight source, and the display panel is connected to the display housing through the conductive foam.

7. The display device according to claim 6, characterized in that: The conductive foam is arranged on the surfaces of both ends of the electromagnetic shielding layer of the color film substrate on a side away from the backlight source.

8. The display device according to claim 6, characterized in that: The display housing is made of metal.

9. A method for manufacturing a color film substrate, characterized in that: include: Providing a substrate; Manufacturing a color filter layer on the first side of the substrate; fabricating an electromagnetic shielding layer on the second side of the substrate; Making an insulating layer on a side of the electromagnetic shielding layer away from the substrate; A touch electrode layer is formed on a side of the insulating layer away from the base substrate.

10. The method for manufacturing a color filter substrate according to claim 9, characterized in that: The electromagnetic shielding layer is a transparent conductive material coating; the electromagnetic shielding layer is a whole-surface coating or a grid-pattern coating; or, The electromagnetic shielding layer is a metal material coating; the electromagnetic shielding layer is a grid pattern coating.

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