Display panel and manufacturing method thereof

Abstract

The present application discloses a display panel and a method for manufacturing the same. The display panel includes a substrate, a grating structure, and a light-emitting device layer and an organic layer located on one side of the substrate and stacked in sequence in a direction away from the substrate. The organic layer is located on the light-emitting surface of the light-emitting device layer. In a first direction, at least a portion of the grating structure is embedded in the organic layer, wherein the first direction is parallel to the thickness direction of the substrate. The present application forms a grating structure by inserting a strip of metal sheet with high reflectivity into the organic layer. The grating structure effectively reflects divergent light, reducing light divergence. Simultaneously, the insertion of the parallel grating structures achieves control of the viewing angle of the screen, thereby converging the viewing angle, reducing the viewing angle range, and reducing the manufacturing cost.

Description

Technical Field

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

[0002] In the information age, more and more people have a growing demand for privacy. Many people need to be able to see the content they need at a normal viewing angle, but not be able to see the content on the screen at other viewing angles.

[0003] Currently, the industry's most common method for preventing peeping is to apply a privacy film, but this is very expensive. Traditional privacy films utilize the principle of black light absorption, allowing visibility from the front and appearing black from the side, thus achieving a left-right privacy protection effect. However, the black material absorbs light significantly, significantly reducing the light output of the display panel. Summary of the Invention

[0004] The present application provides a display panel and a manufacturing method thereof to solve the technical problem of light divergence caused by refraction when light passes through other film layers.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: a display panel, comprising: a substrate, a grating structure, and a light-emitting device layer and an organic layer located on one side of the substrate and stacked in sequence in a direction away from the substrate, the organic layer being located on the light-emitting surface side of the light-emitting device layer; in a first direction, at least part of the grating structure is embedded in the organic layer, wherein the first direction is parallel to the thickness direction of the substrate.

[0006] Furthermore, the grating structure is an anti-peeping grating structure.

[0007] Furthermore, the grating structure is used to focus the light emitted by the light-emitting device layer to a preset viewing angle through reflection;

[0008] Furthermore, the grating structure includes a plurality of metal sheets, which are arranged at intervals along a second direction perpendicular to the first direction, at least a portion of any metal sheet is embedded in the organic layer, and the angle between each metal sheet and the first direction is greater than or equal to 0° and less than or equal to 45°.

[0009] Furthermore, the display panel includes a display area and a non-display area surrounding at least a portion of the display area.

[0010] The display area includes a plurality of light-emitting areas arranged at intervals and a non-light-emitting area located between the light-emitting areas, and any light-emitting area overlaps with the orthographic projections of at least two metal sheets on the substrate;

[0011] Furthermore, in a third direction perpendicular to both the first direction and the second direction, the length of the metal sheet extending is greater than the length of the light emitting area extending.

[0012] Furthermore, the metal sheets on two opposite sides along the second direction in the display area have sides farther from the light-emitting device layer than sides closer to the light-emitting device layer, and the closer the metal sheet is to the center of the display area, the smaller the angle between the metal sheet and the first direction.

[0013] or,

[0014] The metal sheets on two opposite sides of the light-emitting area along the second direction are inclined toward the center of the light-emitting area with respect to the sides closer to the light-emitting device layer, and the closer the metal sheet is to the center of the light-emitting area, the smaller the angle between the metal sheet and the first direction.

[0015] Alternatively, the metal sheets are parallel to each other.

[0016] Furthermore, the reflectivity of the metal sheet is greater than 80%.

[0017] Furthermore, in the second direction, the minimum spacing between adjacent metal sheets is greater than or equal to 0.02 mm and less than or equal to 0.1 mm;

[0018] Furthermore, the metal sheets are arranged at equal intervals along the second direction.

[0019] Furthermore, in the first direction, all the grating structures are located in the organic layer, and a side of the grating structure facing away from the light-emitting device layer is flush with a side of the organic layer facing away from the light-emitting device layer;

[0020] Furthermore, the organic layer is an organic encapsulation layer.

[0021] Furthermore, the display panel further includes a dam, which is arranged around the light-emitting device layer and is located at an edge of the organic encapsulation layer.

[0022] Furthermore, the display panel further includes a first inorganic encapsulation layer, the first inorganic encapsulation layer is located between the light emitting device layer and the organic encapsulation layer, and the first inorganic encapsulation layer is located between the light emitting device layer and the grating structure.

[0023] Furthermore, the display panel further includes a second inorganic encapsulation layer, and the organic encapsulation layer and the grating structure are located between the second inorganic encapsulation layer and the light-emitting device layer.

[0024] Another technical solution adopted in this application is: a method for manufacturing a display panel, comprising the following steps:

[0025] providing a substrate;

[0026] forming a light emitting device layer on one side of the substrate;

[0027] applying an organic solution on a side of the light-emitting device layer away from the substrate;

[0028] The side of the thermal transfer plate provided with the grating structure is arranged opposite to the side of the organic solution away from the light-emitting device layer, and at least a portion of the grating structure is embedded in the organic solution;

[0029] solidifying the organic solution to form an organic layer;

[0030] Remove the thermal transfer plate.

[0031] Furthermore, the step of embedding at least a portion of the grating structure in the organic solution comprises:

[0032] Pressure is applied toward the organic solution from the side of the thermal transfer plate facing away from the grating structure, so that the surface of the thermal transfer plate facing the organic solution contacts the organic solution, and the grating structure is completely embedded in the organic solution.

[0033] Furthermore, the step of removing the thermal transfer plate includes:

[0034] The thermal transfer plate is heated to a softened state, and the grating structure is separated from the thermal transfer plate.

[0035] Different from the existing technology, this application utilizes a grating structure inserted into the organic layer contained in the display panel itself. The grating structure effectively reflects the scattered light, reduces the light loss at the positive viewing angle, and thus reduces the divergence of light. At the same time, the parallel arranged grating structures realize the control of the viewing angle of the screen, which can play the role of converging the viewing angle, thereby adjusting the viewing angle range. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0037] Figure 1 is a schematic cross-sectional structure diagram of the display panel of the present application;

[0038] Figure 2 yes Figure 1 A structural diagram of an embodiment of a grating structure;

[0039] Figure 3 is a schematic cross-sectional structural diagram of an embodiment of a display panel of the present application;

[0040] Figure 4 is a schematic cross-sectional structural diagram of another embodiment of a display panel of the present application;

[0041] Figure 5 is a schematic cross-sectional structural diagram of another embodiment of a display panel of the present application;

[0042] Figure 6 is a schematic cross-sectional structural diagram of yet another embodiment of a display panel of the present application;

[0043] Figure 7 is a schematic cross-sectional structural diagram of another embodiment of a display panel of the present application;

[0044] Figure 8 is a structural diagram of another embodiment of a display panel of the present application;

[0045] Figure 9 It is a structural schematic diagram of the thermal transfer process of the present application;

[0046] Figure 10 It is a flow chart of an embodiment of a method for manufacturing a display panel of the present application. DETAILED DESCRIPTION

[0047] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of an embodiment of a display panel of the present application. The display panel 10 includes: a substrate 100, a grating structure 102, and a light-emitting device layer 101 and an organic layer 103 located on one side of the substrate 100 and stacked in a direction away from the substrate 100.

[0049] The organic layer 103 is located on the light emitting surface side of the light emitting device layer 101 ; in a first direction X, at least part of the grating structure 102 is embedded in the organic layer 103 , wherein the first direction X is parallel to the thickness direction of the substrate 100 .

[0050] The display panel 10 may include an organic light emitting display panel or a liquid crystal display panel. The display panel may be a flexible display panel or a rigid display panel. The display panel 10 may be provided in an anti-peeping device, an automobile instrument panel, or the like.

[0051] The fact that at least a portion of the grating structure 102 is embedded in the organic layer 103 means that the grating structure 102 may be completely disposed inside the organic layer 103 or partially exposed above the organic layer 103 .

[0052] In the above-mentioned design method, the present application utilizes a grating structure 102 inserted into the organic layer 103. The grating structure 102 effectively reflects the scattered light, which can play a role in converging the viewing angle and reduce the light loss at the positive viewing angle. At the same time, the parallel arrangement of the grating structures 102 facilitates the control of the viewing angle of the screen and can be set to the desired convergence angle as needed.

[0053] Among them, optionally, the light-emitting device layer 101 may include an organic light-emitting device layer. Optionally, the organic light-emitting device layer may include an anode, a hole injection layer, a hole transport layer, an electron blocking layer, an organic light-emitting layer, an electron injection layer, an electron transport layer, a hole blocking layer and a cathode, etc. The grating structure 102 of the present application can adjust the viewing angle range and collect the light emitted by the light-emitting device layer 101 above the grating structure 102, thereby solving the problem of different refractive indices of various film layers in the light-emitting device layer, light being repeatedly refracted between film layers, and the uneven surface of the reflective electrode (such as the anode), resulting in scattering of the emitted light, thereby reducing the viewing angle range.

[0054] Optionally, the grating structure 102 is used to converge the light emitted by the light-emitting device layer 101 to a preset viewing angle through reflection. The preset viewing angle can be set as needed, and the embodiments of the present application are not limited to this. The picture displayed on the display panel can be seen within the preset viewing angle range, and the picture displayed on the display panel cannot be seen outside the preset time range. This design can reflect the light emitted by the light-emitting device layer 101 in the grating structure 102 to converge the light to one side, or to the middle, for example, to prevent the light from diverging to both sides and to prevent the side from peeking into the display panel. The grating structure 102 may include a sheet structure coated with a reflective material, etc.

[0055] Optionally, the grating structure 102 is a privacy grating structure. Exemplarily, the grating structure 102 can be used to prevent light from diverging to the sides, thereby preventing someone from viewing the contents of the display panel 10 from the sides. Exemplarily, light emitted by the light-emitting device layer 101 is reflected in the grating structure 102 to converge the light to one side, thereby preventing someone from viewing the contents of the display panel 10 from the center or the other sides.

[0056] Optionally, the grating structure 102 includes a plurality of metal sheets 1021, which are arranged at intervals along a second direction Y. At least a portion of each metal sheet 1021 is embedded in the organic layer 103. Optionally, the second direction Y intersects the first direction X. Optionally, the second direction Y is perpendicular to the first direction X. The metal sheets have a reflective effect.

[0057] The fact that at least a portion of any metal sheet 1021 is embedded in the organic layer 103 means that the metal sheet 1021 may be fully embedded in the organic layer 103 , or partially embedded in the organic layer 103 and the other portion not embedded in the organic layer 103 .

[0058] Optionally, an angle α between each metal sheet 1021 and the first direction X is greater than or equal to 0° and less than or equal to 45°.

[0059] The angles α between the plurality of metal sheets 1021 and the first direction X can be equal or different. The grating structure 102 has a plurality of groups of strip-shaped metal sheets 1021 arranged in parallel along the second direction Y. Figure 2 The angle α between the metal sheet 1021 and the first direction X ranges from 0° to 45° (for example, 10°, 20°, 30°, 40°, etc.).

[0060] Please continue reading Figure 1 The display panel 10 may include a display area. The display area may include a plurality of light-emitting regions 1010 spaced apart and a non-light-emitting region between the light-emitting regions 1010.

[0061] Optionally, the display panel 10 provided in the present application further includes a pixel definition layer 1011, the light-emitting device layer 101 includes a plurality of light-emitting devices arranged at intervals, one light-emitting device corresponds to one light-emitting area 1010, the pixel definition layer 1011 includes a plurality of hollow areas (i.e., pixel openings) arranged at intervals, one light-emitting device is arranged in one hollow area, and a non-luminous area is between the two light-emitting devices.

[0062] Optionally, the display panel may further include a driving array layer located between the light emitting device layer 101 and the substrate 100 .

[0063] Optionally, any light-emitting region 1010 overlaps with the orthographic projections of at least two metal sheets 1021 on the substrate 100. Optionally, the orthographic projection of the grating structure 102 on the light-emitting device layer 101 is partially located within the light-emitting region 1010 and partially located within the non-light-emitting region. The position of the light-emitting region 1010 corresponds to the position of the at least two metal sheets 1021 of the grating structure 102, and the metal sheets 1021 are located directly above the light-emitting region 1010, so that the grating structure 102 can reflect most of the light emitted upward from the light-emitting region 1010, for example, so that the light is concentrated above the organic layer 103, while the light emitted to the sides is reduced, which can effectively reduce the peeking of the content of the display panel from the side perspective.

[0064] In one embodiment, the number of metal sheets 1021 disposed directly above the portion of the light-emitting area 1010 can be selected based on actual needs. A higher density of metal sheets 1021 results in a smaller viewing angle range after convergence, better collimation, and higher light intensity. The density of metal sheets 1021 can be adjusted as needed to achieve a desired convergence viewing angle range.

[0065] The density of metal sheets 1021 is relatively low directly above some light-emitting areas 1010, and at least two metal sheets 1021 are required to reflect light from the light-emitting areas 1010. This can reflect and focus light from the light-emitting areas 1010 with relatively low light intensity, thereby making certain parts of the display panel 10 more visible. In another embodiment, a higher density of metal sheets 1021 can be provided above all light-emitting areas 1010, so that the metal sheets 1021 can focus light from all light-emitting areas 1010 at a predetermined viewing angle, such as above the organic layer 103, thereby improving the overall viewing angle and preventing side peeks.

[0066] Optionally, in the third direction Z, the length of the metal sheet 1021 is greater than the length of the light-emitting area 1010. Optionally, the third direction Z is perpendicular to both the first direction X and the second direction Y. This design can ensure that the length of the metal sheet 1021 is greater than the light-emitting area 1010, thereby further ensuring that the orthographic projection of the grating structure 102 can completely cover the light-emitting area 1010, so that the grating structure 102 can reflect most of the light emitted upward from the light-emitting area 1010, reducing the divergent light and converging the light to a preset viewing angle, such as above the organic layer 103, while reducing the light emitted to the sides, which can effectively reduce the glimpse of the content of the display panel from the side viewing angle.

[0067] See also Figure 3 , Figure 3 This is a schematic cross-sectional view of an embodiment of a display panel of the present application. Metal sheets 1021 on opposite sides of the light-emitting region 1010 along the second direction Y are tilted toward the center of the light-emitting region 1010 relative to the side closer to the light-emitting device layer 101. Optionally, the closer the metal sheet 1021 is to the center of the light-emitting region 1010, the smaller the angle between it and the first direction X. In a grating unit 102 of the grating structure directly above each light-emitting region 1010, the center of the orthographic projection of the light-emitting device layer 101 coincides with the center of the light-emitting region 1010. The metal sheet 1021 in the middle of the grating unit is vertical, while the metal sheets 1021 on either side are tilted toward the center. Since the metal sheets 1021 can converge light from the light-emitting region 1010 below directly above them, properly tilting the metal sheets 1021 toward the center can reflect the converged light toward the center, allowing the viewer to clearly see the contents of the display panel from the center.

[0068] Optionally, the metal sheets 1021 are parallel to each other and have the same angle with the first direction X. This design allows all the metal sheets 1021 in the grating structure 102 to be arranged at the same angle, for example, the angle α can be 0°, 15°, 30° or 40°.

[0069] See also Figure 4 , Figure 4 : This is a schematic diagram of the cross-sectional structure of another embodiment of the display panel of the present application. In one application scenario, for example, a smaller display panel 10 such as a mobile phone screen, when the angle α between the metal sheet 1021 and the first direction X is 0°, the metal sheet 1021 is vertically inserted into the organic layer 103. At this time, light is incident from the light-emitting device layer 101 into the organic layer 103, and is reflected by the metal sheet 1021 in the grating structure 102, so that the light is all concentrated directly above the grating structure 102. Due to the small area of the display panel 10, the screen content can be clearly seen from the display panel 10. However, since the light is concentrated on the front, the light diverging to the side is reflected by the metal sheet 1021 to the top of the panel 10, which can prevent the screen content from being viewed from the side.

[0070] See also Figure 5 , Figure 5 FIG. 1 is a schematic cross-sectional view of another embodiment of the display panel of the present application. In another application scenario, for example, the display panel 10 in the monitoring screen, such as Figure 5 Since there are many monitoring screens in a general monitoring room and the monitoring personnel usually sit in the middle for monitoring, there is a display panel 10 located on the side of the monitoring personnel. The angle α between the metal sheet 1021 and the first direction X is 30°, and the metal sheets 1021 in the display panels 10 on both sides are tilted toward the personnel side. At this time, the light is reflected by the grating structure 102 and converged to the upper side of the display panel 10, making it easier for the monitoring personnel located above the display panel 10 to see the image on the display panel 10. At the same time, because the light is converged to the side close to the monitoring personnel, the other side cannot see the light, and therefore cannot peek into the display panel 10.

[0071] See also Figure 6 , Figure 6 The cross-sectional structure diagram of another embodiment of the display panel of the present application. Optionally, the metal sheets 1021 on two opposite sides along the second direction Y in the display area are inclined toward the center of the display area on the side away from the light-emitting device layer 101 relative to the side close to the light-emitting device layer 101. Optionally, the closer the metal sheet 1021 is to the center of the display area, the smaller the angle between it and the first direction X. Exemplarily, the metal sheets 1021 in the grating structure 102 can be set at different angles, for example, the angle α between the metal sheet 1021 at the center of the grating structure 102 and the first direction X is 0°, while the angle α between the metal sheets 1021 at the two sides and the first direction X is 45°, and the metal sheets 1021 are inclined toward the center end.

[0072] In another application scenario, such as a display panel 10 in a long screen, the angle α between the metal sheet 1021 at the center of the entire grating structure 102 and the first direction X is 0°. The angles α between the metal sheets 1021 and the first direction X increase from the center to the sides, with the angle α at the edge being 45°. At the same time, the metal sheets 1021 on both sides are tilted toward the center. In this case, due to the long length of the display panel 10, the metal sheet 1021 at the center with an angle α of 0° can converge light directly above the display panel 10, making it easier for the human eye to capture it. The metal sheets 1021c on both sides, which are tilted toward the center, can reflect and converge the light from the screen on both sides toward the center as much as possible, making it easier for the human eye to perceive the display images on both sides.

[0073] Optionally, the metal sheet 1021 is made of a metal with a reflectivity greater than 80%. The metal sheet 1021 with a reflectivity greater than 80% can better reflect the reflected light of the light emitting device layer 101.

[0074] Optionally, the metal sheet 1021 is configured as a strip-shaped sheet, which is convenient for manufacturing and increases the reflection area of light, thereby gathering more light.

[0075] Optionally, the metal sheet 1021 is made of silver or molybdenum. The refractive index of silver is 0.18, and the reflectivity is 91%; the refractive index of molybdenum is 2.81, and the reflectivity is greater than 80%; and the thermal expansion coefficients of silver and molybdenum are low, which can effectively avoid the influence of heat generated during thermal transfer and when the OLED device is working on the grating structure 102.

[0076] In the second direction Y, the minimum spacing L between adjacent metal sheets 1021 is greater than or equal to 0.02 mm and less than or equal to 0.1 mm (for example, 0.02 mm, 0.05 mm, 0.07 mm, 0.09 mm, etc.); if the density of the metal sheets 1021 is too low, the light convergence height will be too low, and if the density of the metal sheets 1021 is too high, the light convergence height will be too high. This spacing setting can control the height of the viewing angle convergence at the optimal observation angle.

[0077] Optionally, the metal sheets 1021 are arranged at equal intervals along the second direction Y. Optionally, the spacing between adjacent metal sheets 1021 on the side away from the light emitting device layer 101 in the second direction Y is equal. The minimum spacing L between adjacent metal sheets 1021 is the same; see Figure 4When the spacing L of the grating structure 102 is uniform, the spacing between the metal sheets 1021 is the same, and the grating spacing is uniform, which can converge the viewing angle of the display panel 10 to the same height position, while preventing light from reflecting to the sides, making it impossible to peek at the display panel 10 from the side. Because a greater grating density increases the viewing distance, depending on the usage environment, when the display panel 10 is farther away from the observer, a higher grating density can be set to increase the viewing angle height of the light convergence, thereby facilitating long-distance viewing of the screen. When the display panel 10 is closer to the observer, a lower grating density can be set to reduce the viewing angle of the light convergence, thereby facilitating close-up viewing of the screen.

[0078] See also Figure 7 , Figure 7 This is a schematic diagram of the cross-sectional structure of another embodiment of the display panel of the present application. In one application scenario, when the spacing of the grating structure 102 is uneven, the spacing of the metal sheets 1021 is different. The grating density is high in some parts and low in some parts. This is suitable for screens where the heights of some light-emitting areas 1010 along the first direction X are uneven, such as screens with multiple light sources such as instrument panels. The density of the metal sheets 1021 above the light-emitting areas 1010 closer to the grating structure 102 is low, while the density of the metal sheets 1021 above the light-emitting areas 1010 farther from the grating structure 102 is high. This allows the light-emitting areas 1010 with different distances from the grating structure 102 to converge at the same height viewing angle. Metal sheets 1021 of different densities can be set at the corresponding positions of light sources at different heights inside the screen to ensure that all light is converged at the same height and the viewing angle is clear.

[0079] See Figure 8 , Figure 8 This is a schematic cross-sectional view of another embodiment of a display panel of the present application. In a first direction X, all grating structures 102 are located within the organic layer, and the side of the grating structure 102 facing away from the light-emitting device layer 101 is flush with the side of the organic layer 103 facing away from the light-emitting device layer 101. This design ensures that the grating structure 102 is entirely located within the organic layer 103, completely encapsulating the grating structure 102 to prevent moisture from corroding the metal sheet 1021 therein. Furthermore, when light is reflected by the metal sheet 1021, the light path is stable, and the light converges at a relatively fixed viewing angle.

[0080] Optionally, the display panel includes a display area 1001 and a non-display area 1002 surrounding at least a portion of the display area.

[0081] Optionally, the organic layer 103 is an organic encapsulation layer. In this embodiment, the organic encapsulation layer may include one or more materials selected from epoxy, acrylic, and polyimide. The organic encapsulation layer may be used to encapsulate and protect the light-emitting device layer 101.

[0082] Optionally, the display panel 10 further includes a dam 106 disposed around the light-emitting device layer 101 and located at the edge of the organic encapsulation layer 103. The dam 106 is used to prevent overflow of the organic solution used to prepare the organic layer 103, thereby achieving a narrow bezel. The dam 106 may be composed of an organic material or an inorganic material. The dam 106 may be located in the non-display area 1002.

[0083] Optionally, the display panel 10 further includes a first inorganic encapsulation layer 104 , which is located between the light-emitting device layer 101 and the organic encapsulation layer 103 , and between the light-emitting device layer 101 and the grating structure 102 .

[0084] The first inorganic encapsulation layer 104 prevents air and moisture from entering the light-emitting device layer 101. The first inorganic encapsulation layer 104 can be made of a non-metallic oxide or a metal oxide. The non-metallic oxide includes at least one of silicon nitride, silicon oxide, and silicon oxynitride, and the metal oxide includes at least one of aluminum oxide, zirconium oxide, and titanium oxide. The first inorganic encapsulation layer 104 can be formed by chemical vapor deposition or other methods.

[0085] Optionally, the display panel 10 further includes a second inorganic encapsulation layer 105, and the organic encapsulation layer 103 and the grating structure 102 are located between the second inorganic encapsulation layer 105 and the light-emitting device layer 101. This design can protect the organic encapsulation layer 103 and the grating structure 102 therein, and prevent air and water vapor from corroding the metal sheet 1021 in the grating. The material of the second inorganic encapsulation layer 105 can be a non-metallic oxide or a metal oxide, the non-metallic oxide including at least one of silicon nitride, silicon oxide, and silicon oxynitride, and the metal oxide including at least one of aluminum oxide, zirconium oxide, and titanium oxide. The above-mentioned second inorganic encapsulation layer 105 can be formed by chemical vapor deposition or the like. The second inorganic encapsulation layer 105 can prevent air and water vapor from entering the light-emitting device layer 101.

[0086] Optionally, the first inorganic encapsulation layer 104 and the second inorganic encapsulation layer 105 are located on the side of the dam 106 away from the substrate 101. The first inorganic encapsulation layer 104 and the second inorganic encapsulation layer 105 may be in contact with each other. The second inorganic encapsulation layer 105 wraps around the organic encapsulation layer 103, thereby effectively cutting off the path for water and oxygen to invade from the organic encapsulation layer 103 and improving the reliability of the encapsulation.

[0087] Optionally, the height of the metal sheet 1021 in the first direction X is D1, and the thickness of the organic layer 103 in the first direction X is D2, wherein D1 is smaller than D2. This design can leave a certain distance between the grating structure 102 and the light-emitting device layer 101 below, thereby preventing the grating structure 102 from damaging the light-emitting device layer 101 during thermal transfer, and effectively avoiding the influence of heat generated by the light-emitting device during operation on the grating structure.

[0088] See also Figure 9 and Figure 10 , Figure 9 This is a structural diagram of an embodiment of the thermal transfer plate of this application. Figure 10 This is a flow chart of one embodiment of a method for manufacturing a display panel of the present application. The method for manufacturing a display panel provided in the present application can be used to manufacture the display panel provided in any of the above embodiments. The method comprises:

[0089] Step S1: providing a substrate 100 .

[0090] The substrate 100 may be a rigid substrate, such as a glass substrate, or a flexible substrate, such as a polyimide substrate.

[0091] Step S2 : forming a light emitting device layer 101 on one side of the substrate 100 .

[0092] The light-emitting device layer 101 may include an organic light-emitting device layer.

[0093] Step S3 : applying an organic solution on the side of the light-emitting device layer 101 away from the substrate 100 .

[0094] Specifically, an organic solution is applied on the light emitting device layer 101 until the organic solution is still and leveled. The organic solution can be formed by inkjet printing, spraying, coating, etc.

[0095] Step S4: arranging the side of the thermal transfer plate 200 provided with the grating structure 102 opposite to the side of the organic solution away from the light-emitting device layer 101, and embedding at least a portion of the grating structure 102 into the organic solution.

[0096] At least a portion of the grating structure 102 is inserted into the unsolidified organic solution.

[0097] Optionally, the thermal transfer plate 200 is first heated to a set temperature, so that the thermal glue layer of the thermal transfer plate 200 is in a softened state, and the grating structure 102 is inserted into the side of the thermal transfer plate 200 corresponding to the light-emitting device layer 101. After the thermal glue layer of the thermal transfer plate 200 is cooled and solidified, the grating structure 102 is fixedly formed on the thermal transfer plate 200, and then the grating structure 102 is inserted into the unsolidified organic solution on the light-emitting device layer 101.

[0098] Optionally, a glue layer is formed on the thermal transfer plate 200, a metal layer is formed on the side of the glue layer away from the thermal transfer plate 200, and then the metal layer is etched into a plurality of metal sheets 1021 by an etching process such as wet etching to form the grating structure 102. The metal layer can be etched into metal sheets that are perpendicular or inclined to the thermal transfer plate 200.

[0099] Among them, the angle of the metal sheet 1021 can be adjusted according to actual needs. In some embodiments, the metal sheet 1021 formed on the thermal transfer plate 200 is perpendicular to the thermal transfer plate 200 by etching or insertion, and then the metal sheet 1021 is vertically inserted into the organic layer 103 through the thermal transfer plate 200, so as to facilitate the entry of light from the light-emitting device layer 101 into the organic layer 103. The vertical metal sheet 1021 can converge the light directly above the display panel.

[0100] In some embodiments, the metal sheet 1021 formed on the thermal transfer plate 200 is tilted relative to the thermal transfer plate 200 by etching or insertion, and the metal sheet 1021 is then inserted obliquely into the organic solution through the thermal transfer plate 200 to facilitate the light emitted by the light-emitting device layer to enter the organic layer. The tilted metal sheet 1021 can converge the light obliquely above the display panel.

[0101] In some embodiments, a middle metal sheet 1021 is formed on the thermal transfer plate 200 by etching or insertion, which is perpendicular to the thermal transfer plate 200, and the metal sheets 1021 on both sides are tilted to the sides. Then, the middle metal sheet 1021 is vertically inserted into the organic solution through the thermal transfer plate 200, and the metal sheets 1021 on both sides are tilted toward the middle and inserted into the organic solution, so as to facilitate the convergence of light to the middle and upper part of the display panel.

[0102] The step of embedding at least a portion of the grating structure 102 into the organic layer 103 comprises:

[0103] Pressure is applied toward the organic layer 103 from the side of the thermal transfer plate 200 facing away from the grating structure 102 , so that the surface of the thermal transfer plate 200 facing the organic layer 103 contacts the organic layer 103 , and the grating structure 102 is completely embedded in the organic layer 103 .

[0104] Step S5: solidifying the organic solution to form an organic layer.

[0105] Specifically, the organic solution can be rapidly solidified from liquid by curing such as ultraviolet irradiation, thereby fixing the grating structure 102 in the organic layer 103. Of course, in other embodiments, when a thermal initiator is provided in the organic layer 103, the organic solution can also be cured by heating.

[0106] Step S6: removing the thermal transfer plate 200 .

[0107] Furthermore, the step of removing the thermal transfer plate 200 includes:

[0108] The thermal transfer plate 200 is heated until it reaches a preset temperature, and the grating structure 102 is separated from the thermal transfer plate 200. When the thermal adhesive layer of the thermal transfer plate 200 is heated and softened, the thermal transfer plate 200 is separated from the grating structure 102 and the thermal transfer plate 200 can be peeled off. However, a portion of the metal sheet 1021 may protrude from the top of the organic layer 103. In this case, the top of the excess metal sheet 1021 can be removed by laser etching or other methods, so that the top of the metal sheet 1021 is flush with the top of the organic layer 103, facilitating the subsequent installation of the second inorganic encapsulation layer 105.

[0109] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that: include: A substrate, a grating structure, and a light-emitting device layer and an organic layer located on one side of the substrate and stacked in sequence in a direction away from the substrate, wherein the organic layer is located on a light-emitting surface side of the light-emitting device layer; In a first direction, at least a portion of the grating structure is embedded in the organic layer, wherein the first direction is parallel to a thickness direction of the substrate; In the first direction, all the grating structures are located in the organic layer, and the side of the grating structure facing away from the light-emitting device layer is flush with the side of the organic layer facing away from the light-emitting device layer; the organic layer is an organic encapsulation layer; the display panel also includes a first inorganic encapsulation layer, the first inorganic encapsulation layer is located between the light-emitting device layer and the organic encapsulation layer, and the first inorganic encapsulation layer is located between the light-emitting device layer and the grating structure; the display panel also includes a second inorganic encapsulation layer, the organic encapsulation layer and the grating structure are located between the second inorganic encapsulation layer and the light-emitting device layer.

2. The display panel according to claim 1, wherein: The grating structure is an anti-peeping grating structure.

3. The display panel according to claim 2, wherein: The grating structure is used to converge the light emitted by the light-emitting device layer to a preset viewing angle through reflection.

4. The display panel according to claim 3, wherein: The grating structure includes a plurality of metal sheets, which are arranged at intervals along a second direction perpendicular to the first direction, at least a portion of any of the metal sheets is embedded in the organic layer, and an angle between each of the metal sheets and the first direction is greater than or equal to 0° and less than or equal to 45°.

5. The display panel according to claim 3, wherein: The grating structure includes a plurality of metal sheets, the plurality of metal sheets are arranged at intervals along a second direction perpendicular to the first direction, and at least a portion of any of the metal sheets is embedded in the organic layer. The display panel includes a display area and a non-display area surrounding at least a portion of the display area. The display area includes a plurality of light-emitting areas arranged at intervals and a non-light-emitting area located between the light-emitting areas. Any of the light-emitting areas overlaps with the orthographic projections of at least two metal sheets on the substrate.

6. The display panel according to claim 5, wherein: In a third direction perpendicular to both the first direction and the second direction, an extended length of the metal sheet is greater than an extended length of the light emitting area.

7. The display panel according to claim 5, wherein: The metal sheets on two opposite sides along the second direction in the display area are inclined toward the center of the display area on the side away from the light-emitting device layer relative to the side close to the light-emitting device layer, and the closer the metal sheet is to the center of the display area, the smaller the angle between it and the first direction.

8. The display panel according to claim 5, wherein: The metal sheets are parallel to each other.

9. The display panel according to claim 5, wherein: The metal sheets on the two opposite sides along the second direction in the light-emitting area are inclined toward the center of the light-emitting area on the side away from the light-emitting device layer relative to the side close to the light-emitting device layer, and the closer the metal sheet is to the center of the light-emitting area, the smaller the angle between it and the first direction.

10. The display panel according to claim 4, wherein: The reflectivity of the metal sheet is greater than 80%.

11. The display panel according to claim 4, wherein: In the second direction, the minimum distance between adjacent metal sheets is greater than or equal to 0.02 mm and less than or equal to 0.1 mm.

12. The display panel according to claim 11, wherein: The metal sheets are arranged at equal intervals along the second direction.

13. The display panel according to claim 1, wherein: The display panel further includes a dam, which is disposed around the light-emitting device layer and is located at an edge of the organic encapsulation layer.

14. The display panel according to claim 5, wherein: The density of the metal sheet above the light emitting region closer to the grating structure is lower, and the density of the metal sheet above the light emitting region farther from the grating structure is higher.

15. The display panel according to claim 5, wherein: The height of the metal sheet in the first direction is D1, and the thickness of the organic layer in the first direction is D2, wherein D1 is smaller than D2.

16. A display panel, characterized in that: include: A substrate, a grating structure, and a light-emitting device layer and an organic layer located on one side of the substrate and stacked in sequence in a direction away from the substrate, wherein the organic layer is located on a light-emitting surface side of the light-emitting device layer; In a first direction, at least a portion of the grating structure is embedded in the organic layer, wherein the first direction is parallel to a thickness direction of the substrate; The grating structure includes a plurality of metal sheets, the plurality of metal sheets are arranged at intervals along a second direction perpendicular to the first direction, and at least a portion of any of the metal sheets is embedded in the organic layer. The display panel includes a display area and a non-display area surrounding at least a portion of the display area. The display area includes a plurality of light-emitting areas arranged at intervals and a non-light-emitting area located between the light-emitting areas, and any of the light-emitting areas overlaps with the orthographic projections of at least two metal sheets on the substrate; The density of the metal sheet above the light emitting region closer to the grating structure is lower, and the density of the metal sheet above the light emitting region farther from the grating structure is higher.

17. A method for manufacturing a display panel, characterized in that: The following steps are involved: providing a substrate; forming a light emitting device layer on one side of the substrate; applying an organic solution on a side of the light-emitting device layer away from the substrate; Disposing a side of a thermal transfer plate provided with a grating structure opposite to a side of the organic solution away from the light-emitting device layer, and embedding at least a portion of the grating structure into the organic solution; solidifying the organic solution to form an organic layer; Remove the thermal transfer plate; wherein, in a first direction, all of the grating structures are located in the organic layer, and the side of the grating structure facing away from the light-emitting device layer is flush with the side of the organic layer facing away from the light-emitting device layer; the organic layer is an organic encapsulation layer; the display panel further comprises a first inorganic encapsulation layer, the first inorganic encapsulation layer is located between the light-emitting device layer and the organic encapsulation layer, and the first inorganic encapsulation layer is located between the light-emitting device layer and the grating structure; the display panel further comprises a second inorganic encapsulation layer, the organic encapsulation layer and the grating structure are located between the second inorganic encapsulation layer and the light-emitting device layer; wherein, the first direction is parallel to the thickness direction of the substrate.

18. The method according to claim 17, characterized in that The step of embedding at least a portion of the grating structure into the organic solution comprises: Pressure is applied toward the organic solution from the side of the thermal transfer plate facing away from the grating structure, so that the surface of the thermal transfer plate facing the organic solution contacts the organic solution, and the grating structure is completely embedded in the organic solution.

19. The method according to claim 17, wherein The step of removing the thermal transfer plate comprises: The thermal transfer plate is heated to a softened state, and the grating structure is separated from the thermal transfer plate.

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