OLED display screen

Abstract

The utility model relates to an OLED display screen, and relates to the field of display technology, the OLED display screen comprises a substrate, a packaging cover and a light-emitting unit arranged on the substrate, the substrate is connected with the packaging cover and packages the light-emitting unit therein, the packaging cover is provided with a groove, a drying agent layer and a supporting separator are arranged in the groove, and the drying agent layer and the supporting separator are arranged in the groove. The desiccant layer and the light-emitting unit are located on the two sides of the supporting isolation piece, and the supporting isolation piece is used for supporting the packaging cover and providing marks for the arrangement position of the desiccant layer. According to the invention, the design of the supporting separator is utilized, the supporting separator provides a clear position mark of the drying agent layer, the drying agent layer is separated from the light-emitting unit, the drying agent layer is ensured to be kept at a design position in the packaging process, moisture is effectively absorbed, and the light-emitting unit is protected; moreover, the supporting separator can provide stable support, prevents the deformation caused by the overlarge groove of the packaging cover, guarantees that the light-emitting unit is not damaged, and also provides the structural stability.

Description

Technical Field

[0001] This application relates to the field of display technologies, and in particular, to an OLED display screen. Background Art

[0002] The OLED (organic light-emitting diode) transparent display screen is an advanced display technology with excellent display performance and visual effects. The main structure of this display screen consists of a glass substrate and a packaging cover. During the manufacturing process, anode lines are fabricated on the glass substrate, and then organic light-emitting materials and cathode materials are deposited through an evaporation process. Based on these materials, the processed glass substrate and the packaging cover are bonded together using ultraviolet (UV) encapsulation glue. The UV encapsulation glue cures under ultraviolet irradiation to form a sealed protective layer to prevent the influence of the external environment on the organic materials.

[0003] In the existing OLED transparent display screen manufacturing technologies, in order to ensure the reliability of the encapsulation and the display effect, multiple key factors must be considered in the design of the packaging cover. Especially in the design of the packaging cover, a groove needs to be precisely etched. The main function of this groove is to prevent the packaging cover from directly contacting the organic material layer due to deformation during the fitting process, thereby avoiding scratching or damaging the organic materials. If the organic materials are scratched, it may lead to a short circuit in the display area, resulting in black spots or non-display areas on the screen, seriously affecting the display effect.

[0004] In addition, a liquid desiccant is usually placed inside the groove of the packaging cover. The function of the desiccant is to absorb the moisture inside the package and prevent the degradation of the display performance caused by humidity. However, due to the transparent characteristics of the OLED display screen, the desiccant must avoid the display area during application. During the manufacturing process, if the position of the desiccant is not clearly marked, it may cause the liquid desiccant to accidentally drop into the display area, thereby affecting the display effect. Summary of the Utility Model

[0005] In order to improve the display effect of the product, this application provides an OLED display screen.

[0006] The OLED display screen provided by this application adopts the following technical solution:

[0007] An OLED display screen includes a substrate, a packaging cover, and a light-emitting unit disposed on the substrate. The substrate is connected to the packaging cover and encapsulates the light-emitting unit therein. The packaging cover is provided with a groove, and a desiccant layer and a support spacer are disposed inside the groove. The desiccant layer and the light-emitting unit are located on both sides of the support spacer. The support spacer is used to support the packaging cover and to provide a mark for the setting position of the desiccant layer.

[0008] By adopting the above technical solution, with the design of the support and isolation member, the support and isolation member provides a clear position identification for the desiccant layer, ensuring that the desiccant layer remains in the designed position during the encapsulation process, effectively absorbing moisture and protecting the light-emitting unit. On the one hand, since the support and isolation member separates the desiccant layer from the light-emitting unit, the desiccant layer does not directly contact the light-emitting unit, thus avoiding potential chemical contamination or physical damage of the desiccant to the light-emitting unit and ensuring the high-quality display effect of the light-emitting unit. On the other hand, the support and isolation member can provide stable support, prevent deformation caused by an over-large groove of the encapsulation cover, ensure that the light-emitting unit is not damaged, and also provide structural stability. Through effectively preventing the contamination of the desiccant layer and maintaining the stability of the encapsulation cover, this application ensures the high-quality display of the OLED display screen, improving the overall display effect and reliability of the OLED display screen.

[0009] In a specific feasible implementation, a gap is left between the support and isolation member and both the desiccant layer and the light-emitting unit.

[0010] By adopting the above technical solution, the gap between the support and isolation member and the light-emitting unit and the desiccant layer provides a certain buffer area, preventing the mechanical pressure of the encapsulation cover from directly acting on the light-emitting unit, reducing potential damage to the light-emitting unit during the encapsulation process, and the gap can reduce the displacement or deformation of the desiccant layer during the encapsulation process, keeping the desiccant in its set position, thereby ensuring the effective utilization of the desiccant function.

[0011] In a specific feasible implementation, a distance is left between the light-emitting unit and the bottom wall of the groove.

[0012] By adopting the above technical solution, using the distance between the light-emitting unit and the bottom wall of the groove avoids the light-emitting unit directly contacting the bottom wall of the groove, thus reducing possible mechanical damage or pressure concentration during the encapsulation process, which helps to protect the integrity and performance of the light-emitting unit.

[0013] In a specific feasible implementation, the height of the desiccant layer is less than the height of the groove.

[0014] By adopting the above technical solution, the lower height of the desiccant layer does not occupy the entire height of the groove, can avoid the direct influence of the desiccant on the light-emitting unit, while still effectively absorbing moisture to protect the light-emitting unit, and can avoid the desiccant layer being overly squeezed during the encapsulation process, thus maintaining its effectiveness and moisture absorption capacity.

[0015] In a specific feasible implementation, the support and isolation member includes a plurality of transparent support columns, and the height of the transparent support columns is equal to the height of the groove.

[0016] By adopting the above technical solution, with the design that the height of the transparent support column is consistent with the height of the groove, the transparent support column provides uniform support, ensuring that the encapsulation cover remains stable during production and use, and reducing friction and damage caused by the deformation of the encapsulation cover.

[0017] In a specific feasible embodiment, the cross-sectional shape of the transparent support column is one of a circle, a rectangle, a triangle, and a polygon.

[0018] By adopting the above technical solution, support columns of different shapes can be designed according to specific requirements, providing more design flexibility and adaptability. Selecting a suitable cross-sectional shape can optimize the strength and stability of the support column, meeting the requirements of different encapsulation designs. Transparent support columns of different shapes can have different effects on the propagation and refraction of light, which helps to optimize the optical performance of the display screen.

[0019] In a specific feasible embodiment, the encapsulation cover and the transparent support column are integrally formed.

[0020] By adopting the above technical solution, with the encapsulation cover and the transparent support column integrally formed, the entire component has higher mechanical strength and stability, avoiding structural weaknesses that may be caused by the connection points between different components, and also being able to eliminate problems such as poor connection or loosening that may occur during assembly, thereby improving the reliability and durability of the overall encapsulation.

[0021] In a specific feasible embodiment, the encapsulation cover and the substrate are connected through an encapsulation adhesive layer, and the encapsulation adhesive layer is arranged along the circumferential direction of the encapsulation cover.

[0022] By adopting the above technical solution, the encapsulation adhesive layer arranged along the circumferential direction of the encapsulation cover can evenly distribute stress in the entire edge area, increasing the connection strength and stability between the encapsulation cover and the substrate, preventing detachment or damage caused by force concentration during use, and the circumferential encapsulation adhesive layer helps to form a continuous sealing ring, effectively preventing external substances from entering the encapsulation interior, thereby improving the reliability and durability of the device.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: The present application utilizes the design of the support spacer. The support spacer provides a clear position identification for the desiccant layer, ensuring that the desiccant layer remains in the designed position during the encapsulation process, effectively absorbing moisture and protecting the light-emitting unit; on the one hand, since the support spacer separates the desiccant layer from the light-emitting unit, the desiccant layer does not directly contact the light-emitting unit, thus avoiding potential chemical contamination or physical damage of the desiccant to the light-emitting unit and ensuring the high-quality display effect of the light-emitting unit; on the other hand, the support spacer can provide stable support, prevent deformation caused by an overly large groove of the encapsulation cover, ensure that the light-emitting unit is not damaged, and also provide structural stability. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of an OLED display screen according to an embodiment of the present application.

[0025] Description of the reference numerals: 1, substrate; 2, encapsulation cover; 21, groove; 3, light-emitting unit; 31, anode layer; 32, organic material layer; 33, cathode layer; 4, desiccant layer; 5, support spacer; 51, transparent support pillar; 6, encapsulation adhesive layer. Detailed Description of the Embodiment

[0026] The following will further elaborate on the present application in conjunction with the Figure 1 drawings.

[0027] Referring to Figure 1 , an OLED display screen is disclosed in an embodiment of the present application, including a substrate 1, an encapsulation cover 2, and a light-emitting unit 3 disposed on the substrate 1. In this embodiment, the substrate 1 is a rectangular plate, and the substrate 1 can be, but is not limited to, a glass substrate 1. The encapsulation cover 2 is a rectangular cover plate, and the encapsulation cover 2 can be, but is not limited to, a transparent glass cover. The length of the encapsulation cover 2 is less than the length of the substrate 1. In this embodiment, the light-emitting units 3 are arranged in an array on the substrate 1. The light-emitting unit 3 includes an anode layer 31, an organic material layer 32, and a cathode layer 33 that are sequentially stacked on the substrate 1. The cross-sectional areas of the anode layer 31, the organic material layer 32, and the cathode layer 33 are all equal;

[0028] The encapsulation cover 2 and the substrate 1 are connected by an encapsulation adhesive layer 6. In this embodiment, the encapsulation adhesive layer 6 can be, but is not limited to, a UV adhesive layer. The UV adhesive layer is a colorless and transparent adhesive layer, and the light transmittance after curing of the UV adhesive layer is greater than 90%. The encapsulation adhesive layer 6 is arranged along the circumference of the encapsulation cover 2, and the substrate 1 and the encapsulation cover 2 jointly encapsulate the light-emitting unit 3 therein; the encapsulation adhesive layer 6 arranged along the circumference of the encapsulation cover 2 can evenly distribute stress in the entire edge area, increasing the connection strength and stability between the encapsulation cover 2 and the substrate 1, preventing detachment or damage caused by force concentration during use, and the circumferential encapsulation adhesive layer 6 helps to form a continuous sealing ring, effectively preventing external substances from entering the encapsulation interior, thereby improving the overall reliability and durability;

[0029] One side of the encapsulation cover 2 close to the substrate 1 is provided with a groove 21. In this embodiment, the groove 21 includes but is not limited to being formed by an etching technique. A desiccant layer 4 and a support spacer 5 are provided in the groove 21. The desiccant layer 4 and the light-emitting unit 3 are located on both sides of the support spacer 5. The support spacer 5 is used to support the encapsulation cover 2 and provide an identification for the setting position of the desiccant layer 4. In this embodiment, the desiccant layer 4 is a liquid desiccant layer 4. The liquid desiccant layer 4 occupies a small space. The original state of the desiccant layer 4 is fluid-like. The fluid-like desiccant is coated in the groove 21. The desiccant will solidify at room temperature and form a layered desiccant layer 4 in the groove 21 after solidification. During the coating process of the desiccant layer 4, the support spacer 5 is used as the coating position identification to ensure the accurate coating position of the desiccant layer 4 and avoid dotting the desiccant layer 4 on the position of the light-emitting unit 3.

[0030] A distance is left between the light-emitting unit 3 and the bottom wall of the groove 21. Thus, it can be avoided that the light-emitting unit 3 directly contacts the bottom wall of the groove 21, reducing the possible mechanical damage or pressure concentration during the encapsulation process, contributing to protecting the integrity and performance of the light-emitting unit 3. And the existence of the distance provides additional space, enabling heat to be better dispersed and managed between the light-emitting unit 3 and the bottom wall of the groove, preventing heat from concentrating at a certain position, thereby reducing the risk of performance degradation or shortened lifespan caused by heat accumulation.

[0031] Gaps are left between the support spacer 5 and both the desiccant layer 4 and the light-emitting unit 3. Thus, it can provide a certain buffer area, preventing the mechanical pressure of the encapsulation cover 2 from directly acting on the light-emitting unit 3, reducing the potential damage to the light-emitting unit 3 during the encapsulation process. And the gaps can reduce the displacement or deformation of the desiccant layer 4 during the encapsulation process, keeping the desiccant in its set position, thereby ensuring the effective utilization of the desiccant function.

[0032] During manufacturing, the light-emitting unit 3 including an anode layer 31, an organic material layer 32, and a cathode layer 33 is manufactured and configured on the substrate 1. The groove 21 is designed on the encapsulation cover 2. The desiccant layer 4 and the support spacer 5 are provided in the groove 21. The support spacer 5 is used as the coating position identification to ensure the accurate coating position of the desiccant layer 4. The fluid-like desiccant is coated in the groove 21. The desiccant will solidify at room temperature and form a layered desiccant layer 4 in the groove 21 after solidification. The support spacer 5 isolates the desiccant layer 4 from the light-emitting unit 3. During encapsulation, the substrate 1 and the encapsulation cover 2 are connected and sealed with an encapsulation adhesive. After the glue solidifies, a sub-packaging glue layer is formed to encapsulate the entire system together to form a complete OLED display screen.

[0033] In this process, by utilizing the design of the support spacer 5, the support spacer 5 provides a clear position identification for the desiccant layer 4, ensuring that the desiccant layer 4 remains in the designed position during the encapsulation process, effectively absorbing moisture and protecting the light-emitting unit 3. On the one hand, since the support spacer 5 separates the desiccant layer 4 from the light-emitting unit 3, the desiccant layer 4 does not directly contact the light-emitting unit 3, thereby avoiding potential chemical contamination or physical damage to the light-emitting unit 3 and ensuring the high-quality display effect of the light-emitting unit 3. On the other hand, the support spacer 5 can provide stable support, prevent deformation caused by an overly large groove 21 of the encapsulation cover 2, ensure that the light-emitting unit 3 is not damaged, and also provide structural stability.

[0034] In this embodiment, the height of the desiccant layer 4 is less than the height of the groove 21. The lower height of the desiccant layer 4 does not occupy the entire height of the groove 21, which can avoid the direct influence of the desiccant on the light-emitting unit 3. At the same time, it can still effectively absorb moisture to protect the light-emitting unit 3 and can avoid the desiccant layer 4 being overly squeezed during the encapsulation process, thereby maintaining its effectiveness and moisture absorption capacity. Moreover, the desiccant layer 4 with a low height allows better air circulation and heat dissipation, which helps to manage the moisture and heat inside the OLED display screen and improve the overall performance and lifespan of the OLED display screen.

[0035] The support spacer 5 includes a plurality of transparent support columns 51, and the height of the transparent support columns 51 is equal to the height of the groove 21. In this embodiment, the number of the transparent support columns 51 is designed according to actual requirements. Through the design that the height of the transparent support columns 51 is consistent with the height of the groove 21, the transparent support columns 51 can provide uniform support, ensure that the encapsulation cover 2 remains stable during production and use, and reduce friction and damage caused by the deformation of the encapsulation cover 2.

[0036] The encapsulation cover 2 and the transparent support columns 51 are made of the same material, which is transparent glass material, and the encapsulation cover 2 and the transparent support columns 51 are integrally formed. Thereby, the entire component has higher mechanical strength and stability, avoiding potential structural weaknesses that may be caused by the connection points between different components, and can also eliminate problems such as poor connection or looseness that may occur during assembly, thereby improving the reliability and durability of the overall encapsulation. Moreover, the integral forming process simplifies the production process, reduces the assembly and connection steps, thereby reducing the production cost and time.

[0037] The implementation principle of an OLED display screen in an embodiment of this application is as follows: This application adopts the design of a support spacer 5. By effectively preventing potential contamination of the desiccant layer 4 and maintaining the stability of the encapsulation cover 2, the display quality and long-term reliability of the OLED display screen are ensured; during the encapsulation process, this design effectively ensures that the desiccant layer 4 always remains in the predetermined design position by clearly identifying the position of the desiccant layer 4, thereby optimizing the function of the desiccant layer 4, enabling it to effectively absorb moisture and protect the light-emitting unit 3, and avoiding the potential impact of moisture on the light-emitting unit 3;

[0038] On the one hand, the support spacer 5 physically isolates the desiccant layer 4 from the light-emitting unit 3, preventing the desiccant from directly contacting the light-emitting unit 3, thereby avoiding possible chemical contamination or physical damage, which ensures high-quality display effects of the light-emitting unit 3 during long-term use; on the other hand, the support spacer 5 not only provides reliable support, avoiding deformation problems caused by an overly large groove 21 in the encapsulation cover 2, but also significantly enhances the stability of the overall structure. This design greatly improves the protection effect of the light-emitting unit 3, while ensuring the durability and stability of the entire encapsulation structure, thereby enhancing the overall performance of the final product.

[0039] The above are all preferred embodiments of this application. Without restricting the protection scope of this application based on this, therefore: All equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An OLED display screen, characterized in that: It includes a substrate (1), a packaging cover (2), and a light-emitting unit (3) disposed on the substrate (1). The substrate (1) is connected to the packaging cover (2) and encapsulates the light-emitting unit (3) therein. The packaging cover (2) is provided with a groove (21), and a desiccant layer (4) and a support spacer (5) are provided in the groove (21). The desiccant layer (4) and the light-emitting unit (3) are located on both sides of the support spacer (5). The support spacer (5) is used to support the packaging cover (2) and provide an identification for the setting position of the desiccant layer (4).

2. The OLED display screen according to claim 1, wherein: A gap is left between the support spacer (5) and both the desiccant layer (4) and the light-emitting unit (3).

3. The OLED display screen according to claim 1, wherein: A distance is left between the light-emitting unit (3) and the bottom wall of the groove (21).

4. The OLED display screen according to claim 1, wherein: The height of the desiccant layer (4) is less than the height of the groove (21).

5. The OLED display screen according to claim 1, wherein: The support spacer (5) includes a plurality of transparent support columns (51), and the height of the transparent support columns (51) is equal to the height of the groove (21).

6. The OLED display screen according to claim 5, wherein: The cross-sectional shape of the transparent support column (51) is one of a circle, a rectangle, and a triangle.

7. The OLED display screen according to claim 5, characterized in that: The packaging cover (2) and the transparent support column (51) are integrally formed.

8. The OLED display screen according to claim 1, wherein: The packaging cover (2) and the substrate (1) are connected through an encapsulation adhesive layer (6), and the encapsulation adhesive layer (6) is disposed along the circumference of the packaging cover (2).

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