Display panel and manufacturing method therefor, display device

Abstract

The display panel provided by the present disclosure achieves the bonding and fixing of the array substrate and the upper substrate by arranging the bonding layer between the array substrate and the upper substrate, the bonding layer comprises a plurality of accommodating areas arranged in an array and spaced from each other, so as to accommodate the light emitting unit and the color conversion unit, thereby avoiding the light crosstalk phenomenon between the color conversion units close to each other, and ensuring the display effect of the display panel. Compared with the prior art, the display panel provided by the present disclosure arranges the bonding layer between the array substrate and the upper substrate, instead of the bonding water glue and the black matrix, avoids the problem of bonding bubbles generated in the alignment process of the two substrates, and makes the structure and the manufacturing process simpler on the premise of ensuring the pixel-level alignment of the array substrate and the upper substrate.

Description

Technical Field

[0001] This disclosure relates to the field of displays, specifically to a display panel and its manufacturing method, and a display device. Background Technology

[0002] With the development of vehicle technology, Micro LED (Micro Light Emitting Diode) has significant advantages in automotive applications as a new generation of display technology. Compared with LCD and OLED technologies, it has advantages such as high brightness, high color gamut, high contrast, and wider viewing angle.

[0003] In existing technologies, the bonding and fixing of the array substrate and the upper substrate in Micro LED display panels mostly uses water-based adhesives or adhesive films. Since water-based adhesives are applied to the entire surface, they can flow into the micro LED pixels, creating air bubbles and affecting the optical performance of the display panel. Furthermore, the micro LED structure requires pixel-level alignment, demanding high bonding precision. Adhesive film bonding methods suffer from precision issues and cannot achieve high-precision alignment. Summary of the Invention

[0004] This disclosure provides a display panel in which an adhesive layer is provided between an array substrate and an upper substrate to achieve bonding and fixation between the array substrate and the upper substrate. The adhesive layer includes a plurality of receiving areas arranged in an array and spaced apart from each other to accommodate light-emitting units and color conversion units, thereby avoiding crosstalk between color conversion units.

[0005] The first aspect of this disclosure provides a display panel, which includes an array substrate including a plurality of light-emitting units; an upper substrate disposed opposite to the array substrate, the upper substrate including a plurality of color conversion units disposed corresponding to the light-emitting units; and an adhesive layer located between the array substrate and the upper substrate for bonding and fixing the array substrate and the upper substrate; wherein the adhesive layer includes a plurality of receiving areas arranged in an array and spaced apart from each other, the receiving areas being used to receive the light-emitting units and the color conversion units.

[0006] In one specific implementation of the first aspect of this disclosure, the adhesive layer is disposed in contact with the array substrate and the upper substrate to make the accommodating area a sealed space.

[0007] In one specific implementation of the first aspect of this disclosure, the adhesive layer includes at least one alignment mark for alignment and bonding with the array substrate and / or the upper substrate.

[0008] In one specific embodiment of the first aspect of this disclosure, the cross-sectional shape of the adhesive layer along the light emission direction of the light-emitting unit includes any one or more combinations of square, rectangle, trapezoid, and inverted trapezoid.

[0009] In one specific implementation of the first aspect of this disclosure, the adhesive layer is made of an adhesive layer composition material, which includes propylene glycol monomethyl ether acetate, titanium dioxide, hyperbranched polysiloxane, acrylic polymer, acrylic monomer, diacetone alcohol, and colored pigment.

[0010] In one specific implementation of the first aspect of this disclosure, the content of propylene glycol monomethyl ether acetate is 40-60%, the content of titanium dioxide is 10-20%, the content of hyperbranched polysiloxane is 5-15%, the content of acrylic polymer is 5-15%, the content of acrylic monomer is 10-20%, and the content of diacetone alcohol is 1-10%.

[0011] In one specific implementation of the first aspect of this disclosure, the colored pigment includes any one of black pigment, gray pigment, and yellow pigment.

[0012] The second aspect of this disclosure provides a method for manufacturing a display panel, the method comprising: providing an array substrate, the array substrate including a plurality of light-emitting units; providing an upper substrate, the upper substrate including a plurality of color conversion units disposed corresponding to the light-emitting units; and preparing an adhesive layer between the array substrate and the upper substrate; wherein the adhesive layer includes a plurality of receiving regions arranged in an array and spaced apart from each other, the receiving regions being used to receive the light-emitting units and the color conversion units.

[0013] In one specific implementation of the second aspect of this disclosure, an adhesive layer is prepared between an array substrate and an upper substrate, comprising: coating an adhesive layer composition material onto the array substrate or the upper substrate; subjecting the adhesive layer composition material to a first photoluminescence exposure for curing; controlling the intensity of the photoluminescence during the first photoluminescence exposure for curing to make the surface of the exposed adhesive layer composition material viscous; attaching the adhesive layer composition material on the array substrate to the upper substrate; or, attaching the adhesive layer composition material on the upper substrate to the array substrate; and subjecting the adhesive layer composition material to a second photoluminescence exposure for curing to fully cure and form an adhesive layer.

[0014] A third aspect of this disclosure provides a display device that includes the display panel described in the first aspect above.

[0015] This disclosure achieves bonding and fixation between the array substrate and the upper substrate by providing an adhesive layer. The adhesive layer includes multiple accommodating areas arranged in an array and spaced apart from each other to accommodate light-emitting units and color conversion units. This avoids light crosstalk between closely spaced color conversion units, ensuring the display effect of the display panel. Compared with the prior art, which uses a black matrix to prevent light crosstalk and adhesive glue to bond the two substrates, the display panel provided by this disclosure uses an adhesive layer instead of adhesive glue and a black matrix. This avoids the problem of bonding air bubbles during the alignment of the two substrates, and simplifies the structure and manufacturing process while ensuring pixel-level alignment of the array substrate and the upper substrate. Attached Figure Description

[0016] Figure 1 This is a top view schematic diagram of a display panel provided in an embodiment of the present disclosure.

[0017] Figure 2 This is a cross-sectional schematic diagram of a display panel provided in one embodiment of the present disclosure.

[0018] Figure 3 This is a top view schematic diagram of an upper substrate provided in an embodiment of the present disclosure.

[0019] Figure 4 This is a top view schematic diagram of an array substrate provided in an embodiment of the present disclosure.

[0020] Figure 5 This is a cross-sectional schematic diagram of a display panel provided for another embodiment of this disclosure.

[0021] Figure 6 This is a cross-sectional schematic diagram of a display panel provided in yet another embodiment of the present disclosure.

[0022] Figure 7 This is a schematic flowchart illustrating a method for manufacturing a display panel according to an embodiment of the present disclosure.

[0023] Figure 8 This is a schematic flowchart illustrating a method for manufacturing a display panel according to another embodiment of the present disclosure.

[0024] Figure 9 This is a schematic flowchart illustrating a method for manufacturing a display panel according to another embodiment of the present disclosure. Detailed Implementation

[0025] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0026] With the development of vehicle technology, vehicles not only bring convenience to users' lives but also improve their travel quality to a certain extent. During travel, in-vehicle display modules installed in the vehicle are needed to provide users with video information, such as navigation maps and caller ID.

[0027] However, automotive display modules need to possess excellent optical performance and automotive-grade weather resistance. Most existing automotive display modules are liquid crystal displays (LCDs), which have excellent structural weather resistance, but their poor optical contrast effect limits the expansion of LCD applications in industries such as automotive.

[0028] In comparison, micro LEDs offer advantages such as high brightness, wide color gamut, high contrast, and extended viewing angles, making them more promising for automotive applications. However, it is well known that mass transfer, a key technological breakthrough in the fabrication process of micro LEDs, presents significant challenges. This limitation restricts the use of Micro LEDs in the automotive industry. Therefore, it is necessary to provide a new type of display panel with a simpler fabrication structure, superior weather resistance, and better optical performance.

[0029] In view of this, the present disclosure provides a display panel that can solve the problem of bonding bubbles caused by the use of bonding water adhesive in the high pixel alignment process of existing Micro LED display panels. Under the premise of ensuring stable optical performance, the structure of the display panel is simpler to manufacture and more suitable for the automotive display industry.

[0030] It should be noted that Micro LED is a light-emitting diode with a size on the micrometer scale. Due to its small size, Micro LED can be used as a pixel on a display panel, and a display panel made using Micro LED can be called a Micro LED display panel.

[0031] Figure 1 This is a top view schematic diagram of a display panel provided in an embodiment of the present disclosure. Figure 2 This is a cross-sectional schematic diagram of a display panel provided according to an embodiment of the present disclosure. Figure 1 and Figure 2As shown, a display panel 10 provided in one embodiment of this disclosure includes an upper substrate 1, an array substrate 2, and an adhesive layer 3 located between the array substrate 2 and the upper substrate 1. The array substrate 2 and the upper substrate 1 are disposed opposite to each other. A plurality of light-emitting units 20 are disposed on the surface of the array substrate 2 near the upper substrate 1, arranged in an array and spaced apart from each other. A color conversion layer is formed on the surface of the upper substrate 1 near the array substrate 2, and a plurality of color conversion units 11 are disposed on the color conversion layer, with each color conversion unit 11 corresponding to one of the light-emitting units 20. The adhesive layer 3 is used to bond and fix the array substrate 2 and the upper substrate 1; wherein, the adhesive layer 3 includes a plurality of receiving areas 31 arranged in an array and spaced apart from each other, and the receiving areas 31 are used to receive the light-emitting units 20 and the color conversion units 11.

[0032] Specifically, the adhesive layer 3 is used to fill the gaps between adjacent color conversion units 11 and adjacent light-emitting units 20, thereby forming multiple matrix rows and matrix columns intersecting each matrix row, thus bonding and fixing the array substrate 2 and the upper substrate 1. The matrix rows and columns intersect to form multiple arrayed and spaced-apart receiving areas 31. The light-emitting units 20 and color conversion units 11 are housed in the receiving areas 31. The adhesive layer 3 can block and absorb the light reflected by adjacent color conversion units 11, thereby preventing crosstalk in the display panel 10 from affecting the display effect. Simultaneously, the adhesive layer 3 can isolate water and oxygen at the edges of the array substrate 2 and the upper substrate 1, improving weather resistance and thus contributing to a better display effect.

[0033] For example, the display panel 10 can be a Micro LED display panel, which includes an array substrate 2 and a plurality of Micro LEDs arranged in an array on the array substrate 2. Each Micro LED is a light-emitting unit 20, which can be regarded as a pixel. The Micro LED can be a micro light-emitting diode containing gallium nitride (GaN), which emits blue light.

[0034] For example, the array substrate 2 can be a monochrome substrate, and the upper substrate 1 can be a white glass substrate. Red, green, and blue color films / adhesives are printed / photolithographically applied / bonded onto the white glass substrate, and then cured. This results in a simpler structure and a thinner overall design. The light emitted by the light-emitting unit 20 needs to pass through the upper substrate 1 to be observed by the user. The upper substrate 1 is made of a transparent material and has good light transmittance. Compared to the polarization problem of three-color substrates, using a monochrome substrate can extend the lifespan of the display panel 10.

[0035] For example, the material of the upper substrate 1 can be an inorganic material, such as silicon dioxide (SiO2), or an organic material, such as polycarbonate (PC), polymethyl methacrylate (PMMA), or polyethylene glycol terephthalate (PET). The material of the array substrate 2 is transparent glass or transparent plastic.

[0036] For example, the color conversion layer includes three color conversion units 11 of different colors. The three color conversion units 11 of different colors can form a minimum repeating unit, and multiple minimum repeating units are arranged in an array on the upper substrate 1. Figure 1 As shown, each row is arranged periodically in the order of the first color conversion unit 12, the second color conversion unit 13, and the third color conversion unit 14. The first color conversion unit 12, the second color conversion unit 13, and the third color conversion unit 14 can be red, green, and blue light-emitting units, respectively. The first color conversion unit 12 can be a red light-emitting unit, the second color conversion unit 13 can be a green light-emitting unit, and the third color conversion unit 14 can be a blue light-emitting unit. Alternatively, the first color conversion unit 12 can be a green light-emitting unit, the second color conversion unit 13 can be a blue light-emitting unit, and the third color conversion unit 14 can be a red light-emitting unit. The specific colors corresponding to the first color conversion unit 12, the second color conversion unit 13, and the third color conversion unit 14 are not specifically limited in this embodiment and can be set according to actual conditions.

[0037] In one embodiment, the first color conversion unit 12 can be a red (Red, R) sub-pixel that emits red light, the second color conversion unit 13 can be a green (Green, G) sub-pixel that emits green light, the third color conversion unit 14 can be a blue (Blue, B) sub-pixel that emits blue light, and the light-emitting unit 20 is a miniature light-emitting diode that emits blue light. The blue light emitted by the light-emitting unit 20 is distributed according to... Figure 2The light emitted from the light-emitting unit 20 is directed upwards in the L direction. The first color conversion unit 12 converts the blue light emitted by the light-emitting unit 20 into red light. The first color conversion unit 12 only emits red light, and other colors of light are filtered out. Similarly, the second color conversion unit 13 converts the blue light emitted by the light-emitting unit 20 into green light, and the third color conversion unit 14 keeps the blue light emitted by the light-emitting unit 20 as blue light. Specifically, the array substrate 2 can emit light to serve as the display light source for the display panel 10. After the light emitted by the light-emitting unit 20 on the array substrate 2 shines on the upper substrate 1, it passes through one or more layers and exits from the upper substrate 1. In this embodiment, the layer structure where the color conversion unit 11 is located is called the color conversion layer. The color conversion unit 11 can convert the color of the light emitted by the light-emitting unit 20 to obtain the color required for display.

[0038] In one embodiment, the shape of the color conversion unit 11 can be a square, rectangle, rhombus, trapezoid, parallelogram, or other polygon. The shape of the color conversion unit 11 can be the same as or different from the shape of the light-emitting unit 20, and this disclosure does not limit this aspect.

[0039] In one embodiment, the first color conversion unit 12, the second color conversion unit 13, and the third color conversion unit 14 can be arranged horizontally side by side to form an RGB pixel arrangement. Alternatively, the first color conversion unit 12, the second color conversion unit 13, and the third color conversion unit 14 can also be arranged vertically side by side. This disclosure does not limit the specific arrangement.

[0040] In this implementation, an adhesive layer 3 is provided between the array substrate 2 and the upper substrate 1 to bond and fix the array substrate 2 and the upper substrate 1. The adhesive layer 3 includes multiple receiving areas 31 arranged in an array and spaced apart from each other to accommodate the light-emitting unit 20 and the color conversion unit 11, thereby avoiding light crosstalk between color conversion units 11 that are close to each other and ensuring the display effect of the display panel 10. Compared with the prior art, which uses a black matrix to prevent light crosstalk and uses adhesive glue to bond the two substrates, this embodiment eliminates the adhesive glue, avoiding defects such as bonding bubbles. Moreover, only an adhesive layer is provided to ensure pixel-level alignment of the array substrate 2 and the upper substrate 1, making the structure and manufacturing process simpler.

[0041] In one implementation of this disclosure, the adhesive layer 3 is disposed in contact with the array substrate 2 and the upper substrate 1, so that the receiving area 31 is a sealed space. Each receiving area 31 is a sealed receiving space. The adhesive layer 3 is bonded and fixed to the array substrate 2 and the upper substrate 1, which is equivalent to wrapping the light-emitting unit 20 and the color conversion unit 11, preventing external water and oxygen from entering the receiving area 31 and causing damage. By isolating water and oxygen, the weather resistance of the display panel 10 is further improved, and the aging of the product is delayed.

[0042] In one implementation of the present disclosure, the adhesive layer 3 includes at least one alignment mark for alignment and bonding with the array substrate 2 and / or the upper substrate 1.

[0043] For example, the shape of the alignment mark includes one of the following: S-shape, zigzag shape, circle, quadrilateral, cross shape, T-shape, and X-shape. The material of the alignment mark is a non-transparent material.

[0044] For example, when the adhesive layer 3 is fabricated on the upper substrate 1, at least one first alignment mark is provided at the edge position of the array substrate 2 near the surface of the upper substrate 1, and at least one second alignment mark is formed at the edge position of the adhesive layer 3 near the surface of the array substrate 2, which is aligned with at least one first alignment mark. Similarly, when the adhesive layer 3 is fabricated on the array substrate 2, at least one first alignment mark is provided at the edge position of the upper substrate 1 near the surface of the array substrate 2, and at least one second alignment mark is formed at the edge position of the adhesive layer 3 near the surface of the upper substrate 1, which is aligned with at least one first alignment mark. The projections of the first alignment mark and the second alignment mark on the horizontal plane are complementary, thereby forming a complementary structure. The number of the first alignment mark and the second alignment mark can be one, two, or more, respectively, and this embodiment does not impose a specific limitation.

[0045] Specifically, at least one first alignment mark can be formed on the surface of the array substrate 2. Using the first alignment mark as a mask, at least one second alignment mark corresponding to the at least one first alignment mark can be formed on the surface of the adhesive layer 3. Each first alignment mark is matched and aligned with each second alignment mark.

[0046] Figure 3 This is a top view schematic diagram of an upper substrate provided in an embodiment of the present disclosure. Figure 4 This is a top view schematic diagram of an array substrate provided according to an embodiment of the present disclosure. Figure 3 and Figure 4 As shown, when the adhesive layer 3 is fabricated on the upper substrate 1, two "+" raised marks are formed at the edge position of the adhesive layer 3 near the surface of the array substrate 2. Two "+" marks are provided at the edge position of the array substrate 2 near the surface of the upper substrate 1. The "+" raised marks and the "+" marks are complementary and aligned.

[0047] In this implementation, by setting alignment marks in the adhesive layer 3, accurate alignment points are provided for the bonding of the array substrate 2 and the upper substrate 1, thereby improving the alignment accuracy of the two substrates and achieving pixel-level alignment.

[0048] In one implementation of this disclosure, the cross-sectional shape of the adhesive layer 3 along the light emission direction of the light-emitting unit 20 includes any one or more combinations of square, rectangle, trapezoid, and inverted trapezoid.

[0049] Figure 5 This is a cross-sectional schematic diagram of a display panel provided for another embodiment of this disclosure. (See diagram below.) Figure 5 As shown, the cross-sectional shape of the adhesive layer 3 along the light emission direction (i.e., direction L) of the light-emitting unit 20 is an inverted trapezoid, which can increase the bonding area between the adhesive layer 3 and the surface of the array substrate 2, further improve the bonding strength, and also has the advantages of large light emission angle and high light emission efficiency.

[0050] Figure 6 This is a cross-sectional schematic diagram of a display panel provided in yet another embodiment of this disclosure. For example... Figure 6 As shown, the cross-sectional shape of the adhesive layer 3 along the light emission direction (i.e., direction L) of the light-emitting unit 20 is trapezoidal, which can increase the bonding area between the adhesive layer 3 and the surface of the upper substrate 1 and improve the bonding strength.

[0051] Figure 7 This is a schematic flowchart illustrating a method for fabricating a display panel according to an embodiment of this disclosure. Figure 7 As shown, the preparation method includes the following steps.

[0052] Step 700: Provide an array substrate, the array substrate including multiple light-emitting units.

[0053] Step 701: Provide an upper substrate, which includes a plurality of color conversion units corresponding to the light-emitting units.

[0054] Specifically, red, green, and blue three-color films or colored adhesives can be printed / photolithographically applied / bonded onto a white glass substrate and then cured to form the upper substrate.

[0055] Step 702: An adhesive layer is prepared between the array substrate and the upper substrate; wherein the adhesive layer includes a plurality of receiving regions arranged in an array and spaced apart from each other, and the receiving regions are used to receive the light-emitting unit and the color conversion unit.

[0056] Specifically, when the array substrate and the upper substrate are aligned and bonded, the light-emitting unit and the color conversion unit correspond exactly to each other and are housed in the receiving area of ​​the adhesive layer.

[0057] In this implementation, an adhesive layer is prepared between the array substrate and the upper substrate to achieve bonding and fixation between them. The light-emitting unit and the color conversion unit are accommodated in a receiving area, thereby avoiding crosstalk between closely spaced color conversion units and ensuring the display effect of the display panel. Compared to the prior art, which uses a black matrix to prevent light crosstalk and adhesive glue to bond the two substrates, this embodiment eliminates the adhesive glue, avoiding defects such as bonding bubbles. By preparing an adhesive layer, pixel-level alignment between the array substrate and the upper substrate can be ensured, simplifying the structure and manufacturing process.

[0058] Figure 8 This is a schematic flowchart illustrating a method for fabricating a display panel according to another embodiment of this disclosure. Figure 8 As shown, an adhesive layer is prepared between the array substrate and the upper substrate (step 702), including the following steps.

[0059] Step 800: Coat the array substrate with an adhesive layer composition material.

[0060] Step 801: The adhesive layer composition material is subjected to a first photocuring process.

[0061] Step 802: By controlling the intensity of the yellow light during the first yellow light exposure curing, the surface of the adhesive layer composition material after exposure becomes tacky.

[0062] Step 803: Attach the adhesive layer composition material on the array substrate to the substrate.

[0063] Step 804: The adhesive layer composition material is subjected to a second photopolymerization curing process to ensure complete curing and formation of the adhesive layer.

[0064] Specifically, by subjecting the adhesive layer composition material to a second yellow light exposure for curing, the adhesive layer formed after complete curing can bond and align the array substrate and the upper substrate, thereby improving the bonding strength.

[0065] In this implementation, an adhesive layer is used, eliminating the need for adhesive glue in the prior art. Adhesion markings can be prepared at the edge of the adhesive layer to achieve pixel-level alignment between the array substrate and the upper substrate. At the same time, crosstalk between red, green and blue pixels is avoided, thus preventing optical defects.

[0066] Figure 9 This is a schematic flowchart illustrating a method for fabricating a display panel according to another embodiment of this disclosure. Figure 9 As shown, an adhesive layer is prepared between the array substrate and the upper substrate (step 702), including the following steps.

[0067] Step 900: Coat the upper substrate with the adhesive layer composition material.

[0068] Step 901: The adhesive layer composition material is subjected to a first photocuring process.

[0069] Step 902: By controlling the intensity of the yellow light during the first yellow light exposure curing, the surface of the adhesive layer composition material after exposure becomes tacky.

[0070] Step 903: The adhesive layer composition material on the upper substrate is bonded to the array substrate.

[0071] Step 904: The adhesive layer composition material is subjected to a second photocuring process to fully cure and form the adhesive layer.

[0072] Specifically, compared to existing ordinary black matrix materials, this adhesive layer composition has a viscosity of 5-100 cP and a solid content of 10-60% before curing. The adhesive layer composition includes propylene glycol monomethyl ether acetate, titanium dioxide, hyperbranched polysiloxane, acrylic polymer, acrylic monomer, diacetone alcohol, and a colored pigment. Propylene glycol monomethyl ether acetate serves as a solvent, with a content of 40-60%; titanium dioxide is used to prevent agglomeration, with a content of 10-20%; hyperbranched polysiloxane has a content of 5-15%; acrylic polymer has a content of 5-15%; acrylic monomer has a content of 10-20%; and diacetone alcohol serves as a solvent, with a content of 1-10%. The colored pigment includes any one of black, gray, or yellow pigments. For example, the colored pigment is a black pigment, such as carbon black.

[0073] During the initial photopolymerization and curing stage, the C=C double bonds of the acrylic polymer and acrylic monomer undergo extensive cross-linking polymerization, forming large, cross-linked resin molecules that are difficult to remove in the developer. Conversely, the polymer and monomers in unexposed areas do not undergo cross-linking polymerization and can be removed in the developer. By controlling the intensity of the photopolymerization to 80-250 mJ / cm² (10-60 μm, GAP), the adhesive layer composition material achieves a curing degree of 50-70%. The hyperbranched polysiloxane and the incompletely cured acrylic polymer and monomers result in an adhesiveness of 500-1000 gf / inch on the surface of the exposed adhesive layer composition material. This adhesiveness is utilized for bonding. The hyperbranched polysiloxane generates diradicals upon exposure, which interact with the other substrate, forming bridging bonds at the interface and thus providing adhesion. After the adhesive layer is bonded to another substrate, a second yellow light exposure curing is performed, and the intensity of the yellow light is controlled at 80-250 mj / cm2 (10-60um, GAP). The adhesive layer composition material can be completely cured to form an adhesive layer, and the impact resistance and adhesion of the adhesive layer are improved.

[0074] This disclosure provides a display device that includes the display panel described in any of the embodiments of the first aspect above.

[0075] It should be understood that the display panel can be an equivalent replacement or a significant modification of any of the display panels described in the above embodiments. The display panel can be applied to various electronic display products, specifically including but not limited to in-vehicle computers, desktop computers, smart TVs, smart refrigerators, and other smart home devices.

[0076] This disclosure provides an in-vehicle display module, which includes the display panel in any of the embodiments of the first aspect described above.

[0077] It should be understood that the vehicle display module of this disclosure can be widely used in various vehicle displays, such as vehicle dashcams, vehicle high-density digital video disc (DVD) navigation systems, progressive DVD (PDVD) players, global positioning system (GPS) navigators, and vehicle industrial control equipment.

[0078] This disclosure provides an in-vehicle display instrument panel, the dial of which uses the aforementioned in-vehicle display module to display instrument information.

[0079] The vehicle display instrument is manufactured using the vehicle display module provided in this embodiment. The vehicle display instrument includes an instrument information display area and a non-display area. Specifically, in the instrument information display area, the dial of the vehicle display instrument can display vehicle speed, RPM, steering indication information, etc.

[0080] The display panel provided according to any embodiment of this disclosure and the display device provided according to the embodiments of this disclosure belong to the same inventive concept, and have corresponding film layer structures and beneficial effects. Details not described in detail in the embodiments of the display device can be found in the embodiments of the display panel, and will not be repeated here.

[0081] The above are merely preferred embodiments of this disclosure and are not intended to limit this disclosure. Any modifications or equivalent substitutions made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A display panel, characterized in that, include: An array substrate comprising multiple light-emitting units; An upper substrate is disposed opposite to the array substrate, and the upper substrate includes a plurality of color conversion units disposed corresponding to the light-emitting units; An adhesive layer is located between the array substrate and the upper substrate, and is used to bond and fix the array substrate and the upper substrate together. The adhesive layer includes multiple receiving areas arranged in an array and spaced apart from each other. The receiving areas are used to receive the light-emitting unit and the color conversion unit. The adhesive layer is in contact with the array substrate and the upper substrate to make the receiving area a sealed space. The adhesive layer is also used to block and absorb the light reflected by the adjacent color conversion units. The adhesive layer includes at least one alignment mark for alignment and bonding with the array substrate and / or the upper substrate. The adhesive layer replaces the bonding water adhesive and black matrix. The adhesive layer is made of an adhesive layer composition material, which includes propylene glycol monomethyl ether acetate, titanium dioxide, hyperbranched polysiloxane, acrylic polymer, acrylic monomer, diacetone alcohol, and colored pigments. The content of propylene glycol monomethyl ether acetate is 40-60%, the content of titanium dioxide is 10-20%, the content of hyperbranched polysiloxane is 5-15%, the content of acrylic polymer is 5-15%, the content of acrylic monomer is 10-20%, and the content of diacetone alcohol is 1-10%.

2. The display panel according to claim 1, characterized in that, The cross-sectional shape of the adhesive layer along the light emission direction of the light-emitting unit includes any one or more combinations of rectangle, trapezoid, and inverted trapezoid.

3. The display panel according to claim 1, characterized in that, The colored pigments include any one of black pigments, gray pigments, and yellow pigments.

4. The display panel according to claim 1, characterized in that, When the adhesive layer is prepared on the upper substrate, at least one first alignment mark is provided at the edge position of the array substrate near the surface of the upper substrate, and at least one second alignment mark is made at the edge position of the adhesive layer near the surface of the array substrate to align with at least one first alignment mark. When the adhesive layer is prepared on the array substrate, at least one first alignment mark is provided at the edge position of the upper substrate near the surface of the array substrate, and at least one second alignment mark is made at the edge position of the adhesive layer near the surface of the upper substrate to align with at least one first alignment mark. The projections of the first alignment mark and the second alignment mark on the horizontal plane are complementary, forming a complementary structure.

5. The display panel according to claim 1, characterized in that, The array substrate is a monochrome substrate, and the upper substrate is a white glass substrate.

6. A method for manufacturing a display panel, characterized in that, include: An array substrate is provided, the array substrate comprising a plurality of light-emitting units; An upper substrate is provided, the upper substrate including a plurality of color conversion units disposed corresponding to the light-emitting unit; An adhesive layer is prepared between the array substrate and the upper substrate; The adhesive layer includes multiple receiving areas arranged in an array and spaced apart from each other. The receiving areas are used to receive the light-emitting unit and the color conversion unit. The adhesive layer is in contact with the array substrate and the upper substrate to make the receiving area a sealed space. The adhesive layer is also used to block and absorb the light reflected by the adjacent color conversion units. The adhesive layer includes at least one alignment mark for alignment and bonding with the array substrate and / or the upper substrate. The adhesive layer replaces the bonding water adhesive and black matrix. The adhesive layer is made of an adhesive layer composition material, which includes propylene glycol monomethyl ether acetate, titanium dioxide, hyperbranched polysiloxane, acrylic polymer, acrylic monomer, diacetone alcohol, and colored pigments. The content of propylene glycol monomethyl ether acetate is 40-60%, the content of titanium dioxide is 10-20%, the content of hyperbranched polysiloxane is 5-15%, the content of acrylic polymer is 5-15%, the content of acrylic monomer is 10-20%, and the content of diacetone alcohol is 1-10%.

7. The preparation method according to claim 6, characterized in that, The step of preparing an adhesive layer between the array substrate and the upper substrate includes: An adhesive layer composition material is coated on the array substrate or the upper substrate; The adhesive layer composition material is first cured by photopolymerization. By controlling the intensity of the yellow light during the first yellow light exposure curing, the surface of the adhesive layer composition material after exposure becomes viscous; The adhesive layer composition material on the array substrate is attached to the substrate; or, The adhesive layer composition material on the upper substrate is bonded to the array substrate; The adhesive layer composition material is subjected to a second photocuring process to fully cure and form the adhesive layer.

8. The preparation method according to claim 7, characterized in that, In the step of first curing the adhesive layer composition material with yellow light exposure, the intensity of the yellow light is 80-250 mJ / cm. 2 To achieve a curing degree of 50-70% for the adhesive layer composition material; and / or, in the step of subjecting the adhesive layer composition material to a second yellow light exposure curing, the intensity of the yellow light is 80-250 mJ / cm. 2 .

9. A display device, characterized in that, The display panel includes any one of claims 1 to 5.

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