Display panel and display device

Abstract

Embodiments of the present invention provide a display panel and a display device. The display panel includes a base substrate, a light-adjusting structure layer, and a light-emitting device layer located therebetween; the light-emitting device layer includes a plurality of light-emitting devices; the light-adjusting structure layer includes a light-adjusting unit, the light-adjusting unit includes a through hole, the through hole overlaps with the light-emitting device, the light-emitting device includes first and second light-emitting devices of different luminous colors, the light-emitting area of ​​the first light-emitting device is larger than the light-emitting area of ​​the second light-emitting device; the light-adjusting unit includes first and second light-adjusting units, and includes a first through hole and a second through hole, respectively, the first light-emitting device overlaps with the first through hole, and the second light-emitting device overlaps with the second through hole; with the direction perpendicular to the base substrate as the vertical direction, the horizontal distance between the inner side of the first light-adjusting unit and the outer edge of the first light-emitting device is h1, the horizontal distance between the inner side of the second light-adjusting unit and the outer edge of the second light-emitting device is h2, and h1>h2.

Description

[0001] This application is a divisional application based on the patent application with application date of May 6, 2020, application number 202010374758.7, and invention name “A display panel, its manufacturing method and display device”. Technical Field

[0002] The present invention relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0003] At present, the mainstream display devices include liquid crystal display devices and organic light-emitting display devices. Among them, in liquid crystal display devices, since liquid crystal does not emit light, it is necessary to set a backlight module to provide light source for the liquid crystal display panel, which results in the overall thickness of the display device being thicker and heavier. In organic light-emitting display devices, organic light-emitting diodes (OLED, Organic Light Emitting Display) are used as light-emitting devices. They have the characteristics of self-luminescence and do not require additional light sources, which is conducive to the overall thinness of the display device and can realize the production of flexible display screens. In addition, organic self-luminous display technology also has the characteristics of fast response speed and wide viewing angle. Therefore, organic self-luminous display technology has become the focus of current research. However, in the current organic light-emitting display technology, part of the large-angle light emitted by the light-emitting device is confined to the inside of the display panel and cannot be emitted from the display panel to contribute to the pixel light emission, affecting the overall light extraction efficiency of the light-emitting device. Summary of the Invention

[0004] Embodiments of the present invention provide a display panel and a display device to solve the technical problem that the light extraction efficiency of a light emitting device is low, which affects the power consumption of the display panel.

[0005] In a first aspect, an embodiment of the present invention provides a display panel, including:

[0006] substrate;

[0007] a light-emitting device layer, located on the base substrate, the light-emitting device layer including a plurality of light-emitting devices;

[0008] a light regulating structure layer, located on a side of the light emitting device layer away from the base substrate, comprising a light regulating unit, wherein the light regulating unit comprises a through hole, and the through hole overlaps with the light emitting device;

[0009] The light emitting device comprises a first light emitting device and a second light emitting device having different light emitting colors, wherein the light emitting area of ​​the first light emitting device is larger than the light emitting area of ​​the second light emitting device;

[0010] The light adjustment unit includes a first light adjustment unit and a second light adjustment unit, the first light adjustment unit includes a first through hole, and the second light adjustment unit includes a second through hole;

[0011] The first light emitting device overlaps with the first through hole, and the second light emitting device overlaps with the second through hole; wherein,

[0012] Taking the direction perpendicular to the substrate as the vertical direction, the horizontal distance between the inner side of the first light adjustment unit and the outer edge of the first light emitting device is h1, and the horizontal distance between the inner side of the second light adjustment unit and the outer edge of the second light emitting device is h2;

[0013] h1>h2.

[0014] In a second aspect, an embodiment of the present invention provides another display panel, including:

[0015] substrate;

[0016] a light-emitting device layer, located on the base substrate, the light-emitting device layer including a plurality of light-emitting devices;

[0017] a light regulating structure layer, located on a side of the light emitting device layer away from the base substrate, and comprising a light regulating unit;

[0018] The light emitting device comprises a first light emitting device and a second light emitting device having different light emitting colors, wherein the light emitting area of ​​the first light emitting device is larger than the light emitting area of ​​the second light emitting device;

[0019] The light adjustment unit includes a first light adjustment unit and a second light adjustment unit; wherein,

[0020] Taking the direction perpendicular to the substrate as the vertical direction, the horizontal distance between the inner side of the first light adjustment unit and the outer edge of the first light emitting device is h1, and the horizontal distance between the inner side of the second light adjustment unit and the outer edge of the second light emitting device is h2; wherein,

[0021] h1>h2.

[0022] In a third aspect, an embodiment of the present invention further provides a display panel, comprising:

[0023] substrate;

[0024] a light-emitting device layer, located on the base substrate, the light-emitting device layer including a plurality of light-emitting devices;

[0025] a light regulating structure layer, located on a side of the light emitting device layer away from the base substrate, comprising a light regulating unit, wherein the light regulating unit comprises a through hole, and the through hole overlaps with the light emitting device;

[0026] The light emitting device comprises a first light emitting device and a second light emitting device having different light emitting colors, wherein the light emitting area of ​​the first light emitting device is larger than the light emitting area of ​​the second light emitting device;

[0027] The light adjustment unit includes a first light adjustment unit and a second light adjustment unit, the first light adjustment unit includes a first through hole, and the second light adjustment unit includes a second through hole;

[0028] The first light emitting device overlaps with the first through hole, and the second light emitting device overlaps with the second through hole; wherein,

[0029] In a cross section formed by the same tangent line, the minimum distance between the inner side of the first light adjustment unit and the outer edge of the first light emitting device is a first distance h1, and the minimum distance between the inner side of the second light adjustment unit and the outer edge of the second light emitting device is a second distance h2;

[0030] h1>h2.

[0031] In a fourth aspect, an embodiment of the present invention provides another display panel, comprising:

[0032] substrate;

[0033] a light-emitting device layer, located on the base substrate, the light-emitting device layer including a plurality of light-emitting devices;

[0034] a light regulating structure layer, located on a side of the light emitting device layer away from the base substrate, and comprising a light regulating unit;

[0035] The light emitting device comprises a first light emitting device and a second light emitting device having different light emitting colors, wherein the light emitting area of ​​the first light emitting device is larger than the light emitting area of ​​the second light emitting device;

[0036] The light adjustment unit includes a first light adjustment unit and a second light adjustment unit; wherein,

[0037] In a cross section formed by the same tangent line, the minimum distance between the inner side of the first light adjustment unit and the outer edge of the first light emitting device is a first distance h1, and the minimum distance between the inner side of the second light adjustment unit and the outer edge of the second light emitting device is a second distance h2;

[0038] h1>h2.

[0039] In a fifth aspect, an embodiment of the present invention further provides a display device, comprising the display panel provided by any embodiment of the present invention.

[0040] The display panel and display device provided by the embodiments of the present invention have the following beneficial effects: the embodiments of the present invention manufacture a light-regulating structure layer above the light-emitting device layer, and the light-regulating structure layer can adjust the optical path of the large-angle light emitted by the light-emitting device, reduce the angle between this part of the light and the direction perpendicular to the substrate, thereby reducing the probability of this part of the light being totally reflected at the film layer interface within the display panel or at the interface between the display panel and the air, and can improve the light extraction efficiency of the light-emitting device, thereby reducing the power consumption of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

[0042] Figure 1 is a cross-sectional schematic diagram of a display panel in the related art;

[0043] Figure 2 A schematic diagram of a partial top view of a display panel provided by an embodiment of the present invention;

[0044] Figure 3 for Figure 2 A schematic diagram of a cross section at the mid-tangent line AA';

[0045] Figure 4 Another cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention;

[0046] Figure 5 Another cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention;

[0047] Figure 6 Another cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention;

[0048] Figure 7 Another cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention;

[0049] Figure 8 Another cross-sectional schematic diagram of a display surface provided by an embodiment of the present invention;

[0050] Figure 9 Another partial top view schematic diagram of a display panel provided by an embodiment of the present invention;

[0051] Figure 10 for Figure 9 A schematic cross-sectional view at the midline BB';

[0052] Figure 11 for Figure 10 Schematic diagram of the principle of the corresponding embodiment;

[0053] Figure 12 Another cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention;

[0054] Figure 13 Another cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention;

[0055] Figure 14 Another simplified cross-sectional view of a display panel provided by an embodiment of the present invention;

[0056] Figure 15 Another schematic top view of a display panel provided by an embodiment of the present invention;

[0057] Figure 16 Another cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention;

[0058] Figure 17 Another cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention;

[0059] Figure 18 Another cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention;

[0060] Figure 19 for Figure 18 Schematic diagram of the principle of the corresponding embodiment;

[0061] Figure 20 A schematic diagram of a display device provided by an embodiment of the present invention;

[0062] Figure 21 The manufacturing method of the display panel provided by the embodiment of the present invention is as follows Figure 1 ;

[0063] Figure 22 The manufacturing method of the display panel provided by the embodiment of the present invention is as follows Figure 2

[0064] Figure 23 The manufacturing method of the display panel provided by the embodiment of the present invention is as follows Figure 3 . DETAILED DESCRIPTION

[0065] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0066] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "an", "the" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0067] Figure 1 is a cross-sectional schematic diagram of a display panel in the related art, such as Figure 1 As shown, in the related art, a plurality of film layer structures are also provided on the light emitting device P', such as the packaging structure layer 11', the optical adhesive layer 12', the protective cover plate 13', etc. The materials used to make each film layer are different, and the refractive index of each film layer is different. During display, the light emitting device P' emits light in multiple angles. As shown in the figure, the light S1' and the light S2' can both be emitted from the display panel, contributing to the luminescence of the pixel. However, the light S3' meets the conditions of total reflection at the interface of the film layer within the display panel. After total reflection, the light S3' is confined inside the display panel. The light S4' is totally reflected at the interface between the display panel and the air and is confined inside the display panel. Both the light S3' and the light S4' cannot be emitted from the display panel, thereby affecting the light extraction efficiency of the light emitting device.

[0068] Based on the above problems, the embodiments of the present invention provide a display panel, a manufacturing method thereof, and a display device. By providing a light-regulating structure layer above the light-emitting device layer, the light at a larger angle emitted by the light-emitting device can have its optical path changed by the light-regulating unit in the light-regulating structure layer, thereby reducing the angle between the light propagation direction and the direction perpendicular to the substrate, which is equivalent to reducing the light emission angle of the large-angle light. As a result, the light at a larger angle emitted by the light-emitting device can also be emitted from the display panel to contribute to the pixel illumination, thereby improving the light extraction efficiency of the light-emitting device and reducing the power consumption of the display panel. The following embodiments will provide detailed examples of the implementation of the present invention.

[0069] Figure 2 A partial top view of a display panel according to an embodiment of the present invention is shown. Figure 3 for Figure 2 A schematic cross-section diagram at the midline AA'.

[0070] like Figure 3The structure of the display panel is simplified and schematically shown. The display panel includes: a base substrate 101, a light emitting device layer 102 and a light regulating structure layer 103; the light emitting device layer 102 is located on the base substrate 101, and the light emitting device layer 102 includes a plurality of light emitting devices P ( Figure 3 Only two are shown in the figure); the light modulation structure layer 103 is located on the side of the light emitting device layer 102 away from the base substrate 101. The light modulation structure layer 103 includes a plurality of light modulation units 31 and a dielectric layer 32 covering the plurality of light modulation units 31. The dielectric layer 32 can be a continuous film layer structure, or it can be a patterned film layer. The dielectric layer 32 includes a plurality of dielectric units, and each dielectric unit covers one light modulation unit 31. Figure 3 The dielectric layer 32 is used as a continuous film structure for illustration. The refractive index n11 of the light adjustment unit 31 is smaller than the refractive index n22 of the dielectric layer 32. Figure 2 and Figure 3 As shown in FIG, each light adjustment unit 31 includes a dimming sub-section F, each light adjustment unit 31 includes a through hole K, the through hole K passes through the light adjustment unit 31 in a direction perpendicular to the substrate (when the display panel is a flat-panel display panel, the direction perpendicular to the substrate e is the same as the direction perpendicular to the display panel), the through hole K overlaps with the light-emitting device P, and the dimming sub-section F is arranged around the through hole K; wherein, as Figure 3 As shown, for one light adjustment unit 31 , the thickness of the light adjustment section F gradually increases in the direction from the through hole K to the light adjustment section F.

[0071] In the embodiment of the present invention, a light regulating structure layer 103 is provided on the light emitting device P. The refractive index n11 of the light regulating unit 31 in the light regulating structure layer 103 is smaller than the refractive index n22 of the dielectric layer 32. When the light emitted by the light emitting device P is irradiated on the interface (i.e., the interface) where the light regulating unit 31 and the dielectric layer 32 contact, refraction occurs. Figure 3In the simplified optical path diagram shown in the figure, the light ray S1 emitted by the light-emitting device P irradiates on the interface where the light adjustment unit 31 and the dielectric layer 32 are in contact. The incident angle of the light ray S1 is θ1, and the refraction angle after entering the dielectric layer 32 is θ2. According to the refraction law: n11*sinθ1 = n22*sinθ2. Since n11 < n22, then sinθ1 > sinθ2, so θ1 > θ2, that is, the incident angle is greater than the refraction angle. After the light ray S1 is refracted at the interface between the light adjustment unit 31 and the dielectric layer 32, the included angle between the propagation direction and the direction e becomes smaller, which is equivalent to reducing the light-emitting angle of the large-angle light emitted by the light-emitting device P. Similarly, the light ray S2 also changes its optical path after being refracted at the interface between the light adjustment unit 31 and the dielectric layer 32. In the display panel provided by the embodiment of the present invention, the light adjustment structure layer can adjust the optical path of the large-angle light rays emitted by the light-emitting device, reduce the included angle between this part of the light rays and the direction perpendicular to the substrate, thereby reducing the probability of total reflection of this part of the light rays on the film interface in the display panel or on the interface between the display panel and the air, improving the light-emitting efficiency of the light-emitting device, and thus reducing the power consumption of the display panel.

[0072] Continue to refer to Figure 1 As shown in the figure, the dielectric layer 32 is a planarization layer. In the embodiment of the present invention, by providing a light adjustment structure layer above the light-emitting device, the optical path of the large-angle light rays emitted by the light-emitting device can be adjusted, reducing the included angle between the light rays and the direction perpendicular to the display panel, and reducing the probability that the light rays are confined in the display panel due to total reflection in the display panel, improving the light-emitting efficiency of the light-emitting device. In addition, the dielectric layer is a planarization layer, and the entire planarization layer fabricated during production can cover all the light adjustment units, eliminating the need for etching the dielectric layer, resulting in a simple process. Moreover, the planarization layer can provide a flat surface for the light adjustment structure layer, facilitating the flatness on the light-emitting surface side of the display panel.

[0073] Specifically, the interface between the light adjustment part and the dielectric layer is an arc surface. Among them, the arc surface can be a convex surface that protrudes from the light-emitting device layer towards the side away from the substrate, or a concave surface formed by the light adjustment part recessing towards the light-emitting device layer. Since the interface between the light adjustment part and the dielectric layer is an arc surface, the normal directions corresponding to different parts of the arc surface are different. Therefore, the light rays with the same angle emitted by the light-emitting device have different propagation directions after being refracted when irradiating on different parts of the arc surface. After the large-angle light rays emitted by the light-emitting device are refracted at the interface between the light adjustment part and the dielectric layer, while changing the propagation direction of the light, the light rays can also propagate in multiple different directions, thereby ensuring uniform divergent light emission while improving the light-emitting efficiency of the light-emitting device.

[0074] As Figure 3As shown, the interface between the light dimming section F and the dielectric layer 32 is a convex surface that bulges away from the substrate 101 toward the side of the light emitting device layer 102.

[0075] In another embodiment, as Figure 4 shown, Figure 4 This is another cross-sectional schematic diagram of the display panel provided by the embodiment of the present invention. The interface between the light dimming section F and the dielectric layer 32 is a concave surface. The figure schematically shows the light rays S3 and S4 with a relatively large angle emitted by the light emitting device P. Taking the light ray S3 as an example, the incident angle of the light ray S3 on the interface between the light dimming section F and the dielectric layer 32 is θ3, and the refraction angle after entering the dielectric layer 32 is θ4. According to the refraction law: n11*sinθ3 = n22*sinθ4. Since n11 < n22, then sinθ3 > sinθ4, so θ3 > θ4. That is to say, the propagation direction of the light ray S3 becomes smaller in the angle with the direction e after refraction on the interface between the light dimming section F and the dielectric layer 32, reducing the probability that the light is totally reflected in the display panel and is restricted within the display panel.

[0076] Optionally, the interface between the light dimming section and the dielectric layer can also be a slope surface, that is, in the cross-sectional schematic diagram, the interface between the light dimming section and the dielectric layer is approximately a straight line, and no additional figure is shown here for illustration.

[0077] In one embodiment, the orthographic projection of the light adjustment unit 31 on the substrate 101 is annular. Continuing to refer to Figure 2 As shown in the top view, the direction in which the light adjustment unit 31 projects onto the substrate 101 is the same as the top view direction. Then, in the top view, the light adjustment unit 31 coincides with its orthographic projection on the substrate 101 (not marked in the figure), and it can be seen from the top view that the light adjustment unit 31 is annular. Continuing to refer to Figure 3As shown in FIG, the light adjustment unit 31 includes a first surface M1 on a side away from the base substrate 101, and the first surface M1 is raised toward the side away from the base substrate 101. In this embodiment, the light adjustment unit 31 is equivalent to an annular convex lens structure. The center of the annular convex lens has a through hole, which overlaps with the light-emitting device. The inner portion of the annular convex lens is a dimming section. After the large-angle light emitted by the light-emitting device is directed to the inner portion of the annular convex lens, it will be refracted at the interface between the annular convex lens and the dielectric layer. After refraction, the angle between the propagation direction of the light and the direction perpendicular to the display panel becomes smaller, thereby reducing the probability of this part of the light being totally reflected inside the display panel, which can improve the light extraction efficiency of the light-emitting device. During fabrication, the light modulation units can be fabricated using an inkjet printing process. Ink droplets are sprayed onto the corresponding locations of each light modulation unit. The amount of solvent evaporating from the edges of the ink droplets is much greater than the amount of liquid volume lost. Therefore, the solvent is replenished from the center to the edges, forming a capillary flow from the inside out, causing the solute in the ink to accumulate at the edges. The solute in the ink serves as the material for the light modulation units. After the solvent evaporates, light modulation units with through holes are formed. A dielectric layer is then fabricated above the multiple light modulation units. The fabrication process for the light modulation structure layer in this embodiment is simple, and the specific fabrication method will be described in detail in the following fabrication examples.

[0078] Figure 2 In the figure, the orthographic projection of the light adjustment unit 31 on the substrate 101 is only shown as a circular ring. In another embodiment, the orthographic projection of the light adjustment unit 31 on the substrate 101 may also be a rectangular ring. In another embodiment, the shape of the light adjustment unit 31 is substantially the same as the shape of the outer edge of the light emitting device P in the top view. In one embodiment, Figure 5 Another cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 5As shown, the base substrate 101 further includes an array layer 107, which includes multiple thin-film transistors T. A top-gate thin-film transistor T is illustrated in the figure; alternatively, a bottom-gate thin-film transistor can also be used. The light-emitting device P in the light-emitting device layer 102 includes an anode 7, a light-emitting layer 8, and a cathode 9 stacked in sequence, with the thin-film transistor T connected to the anode 7. An encapsulation layer 104 is also provided above the light-emitting device layer 102. This encapsulation layer 104 includes two inorganic encapsulation layers w and one organic encapsulation layer y, with the organic encapsulation layer y positioned between the two inorganic encapsulation layers w. The luminescent material in the light-emitting layer 8 is sensitive to water and oxygen. The provision of encapsulation layer 104 provides encapsulation and protection for the light-emitting device, thereby isolating it from water and oxygen, ensuring the service life of the light-emitting device P. Within the encapsulation layer 104, the inorganic encapsulation layer w has a high density that effectively blocks water and oxygen molecules, while the organic molecules in the organic encapsulation layer y have excellent flexibility, helping to relieve stress in the inorganic encapsulation layer w and preventing cracks. The light-regulating structure layer 103 is located on a side of the encapsulation layer 104 away from the light-emitting device layer 102 .

[0079] In one embodiment, Figure 6 Another cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 6 As shown, the display panel includes an encapsulation layer 104, and the encapsulation layer 104 is located between the light-emitting device layer 102 and the light-regulating structure layer 103. The light-emitting device P in the figure is only simplified, and the encapsulation layer 104 includes at least one inorganic encapsulation layer w (only two layers are shown in the figure) and at least one organic encapsulation layer y (only one layer is shown in the figure). In the encapsulation layer 104, the inorganic encapsulation layer w and the organic encapsulation layer y are alternately stacked, and the refractive index of the inorganic encapsulation layer w and the organic encapsulation layer y are different. Normally, the refractive index of the organic encapsulation layer y is smaller than the refractive index of the inorganic encapsulation layer w. After the light emitted by the light-emitting device P is absorbed by the encapsulation layer 104, part of the large-angle light will be totally reflected at the interface between the organic encapsulation layer y and the inorganic encapsulation layer w (the simplified light path diagram shown in the figure), and can no longer be emitted from the display panel, which has a certain impact on the light extraction efficiency of the light-emitting device. After the design of the present invention, the light-regulating structure layer is arranged on the side of the packaging layer away from the light-emitting device layer. The light emitted by the light-emitting device is first absorbed by the packaging layer, and then emitted by the packaging layer and absorbed by the light-regulating structure layer. The light-regulating structure layer can adjust the propagation direction of at least part of the large-angle light absorbed therein, thereby preventing more large-angle light from being totally reflected in the display panel and unable to be emitted from the display panel, reducing the probability of total reflection of light in the display panel, and improving the light extraction efficiency of the light-emitting device.

[0080] Furthermore, in some embodiments, the display panel further includes a touch film layer, such as Figure 7 As shown, Figure 7Another cross-sectional schematic diagram of a display panel provided in an embodiment of the present invention includes an encapsulation layer 104 and a touch film assembly layer 105; both the encapsulation layer 104 and the touch film assembly layer 105 are located between the light-emitting device layer 102 and the light-regulating structure layer 103, wherein the encapsulation layer 104 is located on the side of the touch film assembly layer 105 that is closer to the light-emitting device layer 102. The encapsulation layer 104 includes at least one inorganic encapsulation layer w (only two layers are shown in the figure) and at least one organic encapsulation layer y (only one layer is shown in the figure). The touch film assembly layer is only shown in a simplified manner in the figure. Optionally, the touch film assembly layer includes an electrode array consisting of a plurality of block touch electrodes. In the electrode array, the plurality of block touch electrodes are arranged into electrode rows in the row direction, and the plurality of block touch electrodes are arranged into electrode columns in the column direction. Any two adjacent block touch electrodes in an electrode row are electrically connected, and any two adjacent block touch electrodes in an electrode column are electrically connected. Embodiments of the present invention provide a display panel with touch functionality. A thin touch film assembly is fabricated on top of an encapsulation layer, reducing the overall thickness of the panel compared to solutions that laminate the touch film assembly onto the display panel. Furthermore, a light-regulating structure layer is positioned on the side of the touch film assembly away from the light-emitting device layer. This adjusts the optical path of light emitted by the light-emitting devices, which maintains a wide emission angle after passing through the touch film assembly. This reduces the probability of total internal reflection of light within the display panel and improves the light extraction efficiency of the light-emitting devices.

[0081] In one embodiment, referring to the above Figure 2 As shown, two adjacent light modulating units 31 are independent of each other. In a direction perpendicular to the substrate 101, the light emitting device P overlaps with the through hole K of the light modulating unit 31. That is, one light emitting device P corresponds to one light modulating unit 31. By setting up two adjacent light modulating units 31 independently of each other, the dimming subsection in each light modulating unit can adjust the wide-angle light emitted by the corresponding light emitting unit, avoiding interference between the dimming functions of adjacent light modulating units.

[0082] In another embodiment, two partially adjacent light adjustment units are in contact with each other. Figure 8 Another cross-sectional schematic diagram of a display surface provided by an embodiment of the present invention is shown in FIG. Figure 8 As shown, for two adjacent light-emitting devices P1 and P2, light modulator 311 corresponds to light-emitting device P1, and light modulator 312 corresponds to light-emitting device P2, and light modulator 311 contacts light modulator 312. Due to manufacturing process reasons or light modulator size limitations, some adjacent light modulators in the display panel may contact each other. This is sufficient as long as the through-holes of the light modulators overlap with the light-emitting devices, and the thickness of the dimming sections surrounding the through-holes of a light modulator gradually increases in the direction from the through-hole to the dimming sections.

[0083] In some embodiments, the multiple light-emitting devices in the display panel provided by the embodiment of the present invention include a first light-emitting device and a second light-emitting device having different light-emitting colors, and the light-emitting area of ​​the first light-emitting device is larger than the light-emitting area of ​​the second light-emitting device. The light-emitting colors of the light-emitting devices are different, and the light-emitting materials selected in the light-emitting devices are different. Accordingly, the light-emitting efficiencies of the different light-emitting materials are different. In the embodiment of the present invention, the light-emitting area of ​​the light-emitting device is adjusted to balance the effect of the light-emitting efficiency of the light-emitting device on the light-emitting brightness, wherein the light-emitting efficiency of the first light-emitting device is smaller than the light-emitting efficiency of the second light-emitting device, and the light-emitting area of ​​the first light-emitting device is set to be larger than the light-emitting area of ​​the second light-emitting device, so as to achieve color display by light-emitting devices of different colors cooperating with each other.

[0084] The multiple light-emitting devices include a red light-emitting device, a green light-emitting device, and a blue light-emitting device. In one embodiment, the light-emitting area of ​​the blue light-emitting device is larger than the light-emitting area of ​​the red light-emitting device, the light-emitting area of ​​the blue light-emitting device is larger than the light-emitting area of ​​the green light-emitting device, and the light-emitting area of ​​the green light-emitting device is larger than the light-emitting area of ​​the red light-emitting device. In another embodiment, the light-emitting area of ​​the blue light-emitting device is larger than the light-emitting area of ​​the red light-emitting device, the light-emitting area of ​​the blue light-emitting device is larger than the light-emitting area of ​​the green light-emitting device, and the light-emitting area of ​​the green light-emitting device is equal to the light-emitting area of ​​the red light-emitting device. Since the difference in luminous efficiency between the green light-emitting device and the red light-emitting device is small, setting the light-emitting areas of the green and red light-emitting devices equal has a small impact on the display effect. However, the difference in luminous efficiency between the blue light-emitting device and the red and green light-emitting devices is large. Therefore, only the light-emitting area of ​​the blue light-emitting device needs to be designed differently, which is relatively simple in terms of process.

[0085] In one embodiment, Figure 9 Another partial top view schematic diagram of a display panel provided by an embodiment of the present invention. Figure 10 for Figure 9 A schematic cross-sectional view at the midline BB'. Figure 11 for Figure 10 Schematic diagram of the principle of the corresponding embodiment.

[0086] like Figure 9As shown, a first light-emitting device Pa and a second light-emitting device Pb with different light-emitting colors are shown, the light-emitting area of ​​the first light-emitting device Pa is larger than the light-emitting area of ​​the second light-emitting device Pb, a plurality of light adjustment units include a first light adjustment unit 31a and a second light adjustment unit 31b, the first light adjustment unit 31a includes a first through hole K1 and a first dimming section F1 surrounding the first through hole K1, the second light adjustment unit 31b includes a second through hole K2 and a second dimming section F2 surrounding the second through hole K2; the first light-emitting device Pa overlaps with the first through hole K1, and the second light-emitting device Pb overlaps with the second through hole K2, that is, the first light-emitting device Pa corresponds to the first light adjustment unit 31a, and the second light-emitting device Pb corresponds to the second light adjustment unit 31b.

[0087] like Figure 10 Schematically, for a first light modulation unit 31a, the thickness change rate of the first light modulation unit F1 in the direction from the first through hole K1 to the first light modulation unit F1 is γ1; for a second light modulation unit 31b, the thickness change rate of the second light modulation unit F2 in the direction from the second through hole K2 to the second light modulation unit F2 is γ2, and γ2>γ1. The thickness change rate is understood as the ratio of the thickness change of the light modulation unit to the length change of the light modulation unit. The increase in the length of the light modulation unit is the length change of the light modulation unit in the direction from the first through hole to the first light modulation unit in the cross-sectional view; the thickness change of the light modulation unit is the thickness change of the light modulation unit in the direction e in the cross-sectional view.

[0088] like Figure 11A simplified schematic diagram shows two dimming sections with different thickness variation rates, J1 and J2. In the cross-sectional view, from point C to point D, the thickness variation rate of dimming section J2 is greater than that of dimming section J1. The boundary is a line passing through point D and parallel to direction e (i.e., perpendicular to the substrate). Light S5 emitted by light-emitting device P is directed toward the intersection of dimming section J1 and the boundary. Light S5 can be refracted at the interface between dimming section J1 and the dielectric layer, changing its optical path. Light S6 emitted by light-emitting device P is directed toward the intersection of dimming section J2 and the boundary. Light S6 can be refracted at the interface between dimming section J2 and the dielectric layer, changing its optical path. The angle between light S5 and direction e is β2, and the angle between light S6 and direction e is β1, where β1 < β2. This means that dimming section J2 cannot change the optical path of light S5. Light emitted by light-emitting device P at a larger angle is more easily changed by the dimming section with a smaller thickness variation rate. Therefore, in the embodiment of the present invention, γ2 is set greater than γ1. Compared with the second dimming sub-section, the first dimming sub-section can change the optical path of more light at larger angles. In other words, the first dimming sub-section has a more significant effect on improving the light extraction efficiency of the light-emitting device than the second dimming sub-section. The first dimming sub-section corresponds to the first light-emitting device with a larger light-emitting area, which can further balance the difference in luminous efficiency between the first and second light-emitting devices, thereby improving the display effect of the display panel.

[0089] Specifically, in one embodiment, the light emitting area of ​​the blue light emitting device is greater than the light emitting area of ​​the green light emitting device and greater than the light emitting area of ​​the red light emitting device. Figure 12 Another cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 12 As shown, the blue light-emitting device PB corresponds to the light-adjusting unit 31B, which includes a dimming section FB; the green light-emitting device PG corresponds to the light-adjusting unit 31G, which includes a dimming section FG; and the red light-emitting device PR corresponds to the light-adjusting unit 31R, which includes a dimming section FR. For a single light-adjusting unit, in the direction from the through-hole toward the dimming section, the thickness variation rate of the dimming section FB is the smallest, while the thickness variation rate of the dimming section FR is the largest. Therefore, among the dimming sections corresponding to the three light-emitting devices, the dimming section FB is able to change the optical path for more light at larger angles. The dimming section FB has the greatest effect on improving the light extraction efficiency of the blue light-emitting device PB, the dimming section FR has the least effect on improving the light extraction efficiency of the red light-emitting device PR, and the dimming section FG has an intermediate effect on improving the light extraction efficiency of the green light-emitting device PG. By designing the dimming sections corresponding to the three colors of light-emitting devices differently, while ensuring the improvement of the light output efficiency of the light-emitting devices of each color, it is also possible to balance the differences in light-emitting efficiency between different light-emitting devices and improve the display effect of the display panel.

[0090] In another embodiment, the light-emitting area of ​​the green light-emitting device is the same as that of the red light-emitting device, and both are smaller than that of the blue light-emitting device. For a light-adjusting unit, in the direction from the through hole toward the dimming subsection, the thickness change rate of the dimming subsection corresponding to the green light-emitting device is equal to the thickness change rate of the dimming subsection corresponding to the red light-emitting device, and both are greater than the thickness change rate of the dimming subsection corresponding to the blue light-emitting device. The luminous efficiency of the blue light-emitting device differs significantly from that of the red and green light-emitting devices. In this embodiment, only the light-emitting area of ​​the blue light-emitting device and the corresponding dimming subsection are designed differently, which is relatively simple in terms of process.

[0091] In one embodiment, Figure 13 Another cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention. Figure 14 Another simplified cross-sectional view of a display panel provided by an embodiment of the present invention. Figure 13 As shown, the first light adjustment unit 31a corresponds to the first light-emitting device Pa, and the second light adjustment unit 31b corresponds to the second light-emitting device Pb. The first light-emitting device Pa and the second light-emitting device Pb emit different colors, and the light-emitting area of ​​the first light-emitting device Pa is larger than the light-emitting area of ​​the second light-emitting device Pb. The minimum distance between the inner side of the first light adjustment unit 31a and the outer edge of the first light-emitting device Pa is a first distance h1, and the minimum distance between the inner side of the second light adjustment unit 31b and the outer edge of the second light-emitting device Pb is a second distance h2. The first distance h1 is greater than the second distance h2. The first light-emitting device Pa and the second light-emitting device Pb are basically at the same plane height, and the first light adjustment unit 31a and the second light adjustment unit 31b are also basically at the same plane height. As shown in the figure, in the cross-sectional view, the horizontal distance h1 between the inner side of the first light adjustment unit 31a and the outer edge of the first light-emitting device Pa, and the horizontal distance h2 between the inner side of the second light adjustment unit 31b and the outer edge of the second light-emitting device Pb, the light emitted from the edge of the first light-emitting device Pa with an output angle greater than α1 can be adjusted by the first light adjustment unit to change the optical path, and the light emitted from the edge of the second light-emitting device Pb with an output angle greater than α2 can be adjusted by the second light adjustment unit to change the optical path, and h1>h2, so α1>α2. Compared with the first light adjustment unit 31a, the second light adjustment unit 31b can adjust the optical path of more light emitted by the second light emitting device Pb, that is, after the optical path is changed through the interface between the second light adjustment unit 31b and the dielectric layer, the light emitted by the second light emitting device Pb is more close to the second light emitting device PB, and the increase in the light output efficiency of the second light emitting device is greater than the increase in the light output efficiency of the first light emitting device.

[0092] This embodiment can be applied to display panels with curved side surfaces, such as Figure 14 The diagram shows a display panel with a side curved surface (position Q in the figure). It is only a simplified diagram and the specific structure is not shown. Since the side of the display panel is curved, the light emitted during the luminescence of the curved portion will be offset relative to the normal viewing direction f of the display panel, wherein the normal viewing direction f is understood to be the direction in which the user's eyes look toward the display panel when in use. When the user views the side curved surface (position Q) in the normal viewing direction f, there will be a color shift phenomenon, which affects the display effect. This is due to the different attenuation degrees of the light emitted by the light-emitting devices of different colors in the side curved surface display area. Figure 13 In the embodiment, in the side curved display area, different designs are made for the light adjustment units corresponding to the light-emitting devices of different colors. By adjusting the different increases in the light output efficiency of the light-emitting devices of different colors, the differences in the attenuation of the light emitted by the light-emitting devices of different colors are balanced, thereby improving the color deviation problem of the side curved surface and enhancing the display effect.

[0093] Specifically, within the side curved display area: the minimum distance between the inner side of the light adjustment unit corresponding to the blue light-emitting device and the outer edge of the blue light-emitting device is h3, the minimum distance between the inner side of the light adjustment unit corresponding to the green light-emitting device and the outer edge of the green light-emitting device is h4, and the minimum distance between the inner side of the light adjustment unit corresponding to the red light-emitting device and the outer edge of the red light-emitting device is h5. In one embodiment, h3>h4>h5. In another embodiment, h3>h4=h5.

[0094] In one embodiment, the first light-emitting device and the second light-emitting device emit different colors, the light-emitting area of ​​the first light-emitting device is larger than the light-emitting area of ​​the second light-emitting device; the area of ​​the through hole overlapping with the first light-emitting device is a first area, and the area of ​​the through hole overlapping with the second light-emitting device is a second area; wherein the first area is larger than the second area. The area of ​​the through hole overlapping with the light-emitting device is designed according to the different light-emitting areas. The larger the light-emitting area of ​​the light-emitting device, the larger the area of ​​the through hole overlapping with the light-emitting device. In this way, the size of the through hole of the light adjustment unit is designed to adapt to the light-emitting area of ​​the light-emitting device, ensuring that the light adjustment structure layer only adjusts the light path of the larger-angle light emitted by the light-emitting device, and does not change the light path of the smaller-angle light emitted by the light-emitting device, thereby avoiding adverse effects after adjusting the light path of the smaller-angle light.

[0095] Specifically, in one embodiment, Figure 15 As shown, Figure 15Another schematic top view of a display panel provided for an embodiment of the present invention. The plurality of light-emitting devices include a red light-emitting device, a green light-emitting device, and a blue light-emitting device, wherein the light-emitting area of ​​the blue light-emitting device PB is greater than the light-emitting area of ​​the green light-emitting device PG, and the light-emitting area of ​​the red light-emitting device PR. The through hole KB overlaps with the blue light-emitting device PB, the through hole KG overlaps with the green light-emitting device PG, and the through hole KR overlaps with the red light-emitting device PR, wherein the area of ​​the through hole KB is greater than the area of ​​the through hole KG, and the area of ​​the through hole KR is greater than the area of ​​the through hole. The areas of the through holes corresponding to light-emitting devices of different colors are designed to be different, ensuring that part of the large-angle light emitted by each light-emitting device of different colors can change the optical path after the light-regulating structure layer acts, thereby improving the light extraction efficiency of each light-emitting device of different colors.

[0096] In another embodiment, the light-emitting area of ​​the green light-emitting device is the same as the light-emitting area of ​​the red light-emitting device, and both are smaller than the light-emitting area of ​​the blue light-emitting device. The area of ​​the through-hole overlapping with the blue light-emitting device is larger than the area of ​​the through-hole overlapping with the green light-emitting device. The area of ​​the through-hole overlapping with the blue light-emitting device is larger than the area of ​​the through-hole overlapping with the red light-emitting device. The area of ​​the through-hole overlapping with the red light-emitting device is equal to the area of ​​the through-hole overlapping with the green light-emitting device. This is not illustrated in the figure here.

[0097] In some optional embodiments, Figure 16 Another cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention. Figure 16 As shown, the display panel also includes a contact layer 106, which is located between the light-emitting device layer 102 and the light-adjusting structure layer 103, wherein the surface of the contact layer 106 on the side away from the base substrate 101 includes multiple central areas X and peripheral areas Z surrounding the central areas X, the light-adjusting unit 31 is in contact with the peripheral areas Z, and the through hole K exposes the central area X, that is, the shape of the central area X is roughly the same as the shape of the through hole K, and the shape of the peripheral area Z is roughly the same as the shape of the light-adjusting unit 31.

[0098] Specifically, in one embodiment, the surface energy of the central region X is less than the surface energy of the peripheral region Z. In this embodiment, the light modulation unit in the light modulation structure layer can be manufactured using an inkjet printing process. During manufacturing, the surface of the contact layer away from the substrate is first pre-treated to form multiple central regions and multiple peripheral regions, where the surface energy of the central region is less than that of the peripheral region. Then, an inkjet printing process is used to spray ink droplets at positions corresponding to the light-emitting devices, with the ink droplets covering the central region and at least part of the peripheral region. Because the surface energy of the central region is less than that of the peripheral region, the central region is not easily wetted by the ink droplets, while the peripheral region is more easily wetted by the ink droplets than the central region. During the evaporation of the solvent in the ink droplets, the ink in the central region is more likely to gather toward the peripheral region. After the solvent evaporates, a light modulation unit having a through hole is formed, where the through hole exposes the central region. The differential design of the surface energy of the central region and the peripheral region in the contact layer can play an auxiliary role in the manufacturing process of the light modulation unit, ensuring that the light modulation unit having a through hole can be manufactured using the inkjet printing process in a single step. Furthermore, the size of the surface energy difference between the central area and the peripheral area can be adjusted by adjusting the pre-treatment process parameters, thereby enabling the control of the size of the through hole area in the light adjustment unit.

[0099] Specifically, in another embodiment, the roughness of the central region X is less than the roughness of the peripheral region Z. In this embodiment, the light modulation unit in the light modulation structure layer can be fabricated using an inkjet printing process. During fabrication, the surface of the contact layer facing away from the substrate is first pretreated to form multiple central regions and multiple peripheral regions, where the roughness of the central regions is less than that of the peripheral regions. Then, ink droplets are sprayed using an inkjet printing process at locations corresponding to the light-emitting devices, covering the central regions and at least a portion of the peripheral regions. Because the roughness of the central regions is less than that of the peripheral regions, i.e., the central regions are smoother than the peripheral regions, the central regions are less susceptible to infiltration by the ink droplets, while the peripheral regions are more susceptible to infiltration by the ink droplets. During evaporation of the solvent in the ink droplets, the ink in the central region is more likely to converge toward the peripheral regions. After evaporation, a light modulation unit having a through hole is formed, exposing the central region. The differential design of the roughness of the central and peripheral regions in the contact layer can assist in the fabrication of the light modulation unit, ensuring that a light modulation unit having a through hole can be fabricated using an inkjet printing process in a single step. Furthermore, the difference in roughness between the central and peripheral regions can be adjusted by adjusting the pretreatment process parameters, thereby enabling control over the size of the through-holes in the light modulation unit. Optionally, the contact layer is a nanocrystalline layer, wherein the density of nanoparticles in the nanocrystalline layer in the central region is greater than that in the peripheral region.

[0100] Further, Figure 17 Another cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention. Figure 17As shown, a first light-emitting device Pa and a second light-emitting device Pb with different luminous colors are shown, the luminous area of ​​the first light-emitting device Pa is larger than the luminous area of ​​the second light-emitting device Pb, and the multiple central areas include a first central area X1 and a second central area X2; in a direction e perpendicular to the base substrate 101, the first central area X1 and the first light-emitting device Pa overlap, and the second central area X2 overlaps the second light-emitting device Pb.

[0101] In one embodiment, the surface energy of the first central area X1 is less than the surface energy of the second central area X2. The smaller the surface energy, the less likely it is to be wetted by ink droplets when the light adjustment unit is manufactured using an inkjet printing process. During the evaporation of the ink solvent during manufacturing, the ink above the first central area is more likely to gather toward the peripheral area than the ink above the second central area. In other words, the ink above the first central area gathers toward the peripheral area to a greater extent. Accordingly, after the solvent evaporation is completed, the area of ​​the through hole formed above the first central area is larger. By setting the surface energy of the central areas corresponding to light-emitting devices with different luminous colors to be different, it is possible to combine the inkjet printing process to manufacture light adjustment units with through holes of different sizes on light-emitting devices with different luminous colors, thereby achieving the design of the size of the through hole of the light adjustment unit to adapt to the luminous area of ​​the light-emitting device. Differentially designing the surface energy of the central areas corresponding to light-emitting devices with different luminous colors can assist in the manufacture of the light adjustment unit and simplify the manufacturing process.

[0102] Specifically, in one embodiment, the light-emitting area of ​​the blue light-emitting device is larger than the light-emitting area of ​​the green light-emitting device, and the light-emitting area of ​​the green light-emitting device is larger than the light-emitting area of ​​the red light-emitting device; the surface energy of the central area overlapping with the blue light-emitting device is smaller than the surface energy of the central area overlapping with the green light-emitting device, and the surface energy of the central area overlapping with the green light-emitting device is smaller than the surface energy of the central area overlapping with the red light-emitting device.

[0103] In another embodiment, the light-emitting area of ​​the green light-emitting device is the same as the light-emitting area of ​​the red light-emitting device, and both are smaller than the light-emitting area of ​​the blue light-emitting device; the surface energy of the central region overlapping with the blue light-emitting device is smaller than the surface energy of the central region overlapping with the green light-emitting device, and the surface energy of the central region overlapping with the green light-emitting device is equal to the surface energy of the central region overlapping with the red light-emitting device.

[0104] In another embodiment, the roughness of the first central area X1 is less than the roughness of the second central area X2. The smaller the roughness, the less likely it is to be wetted by ink droplets when the light adjustment unit is manufactured using the inkjet printing process. During the evaporation of the ink solvent during manufacturing, the ink above the first central area is more likely to gather toward the peripheral area than the ink above the second central area. In other words, the ink above the first central area gathers toward the peripheral area to a greater extent. Correspondingly, after the solvent evaporation is completed, the area of ​​the through hole formed above the first central area is larger. By setting the surface energy of the central areas corresponding to light-emitting devices with different luminous colors to be different, it is possible to combine the inkjet printing process to obtain light adjustment units with through holes of different sizes on light-emitting devices with different luminous colors, thereby achieving the design of the size of the through hole of the light adjustment unit to adapt to the luminous area of ​​the light-emitting device. Differentially designing the roughness of the central areas corresponding to light-emitting devices with different luminous colors can assist in the manufacture of the light adjustment unit, and the manufacturing process is simple.

[0105] Specifically, in one embodiment, the light-emitting area of ​​the blue light-emitting device is larger than the light-emitting area of ​​the green light-emitting device, and the light-emitting area of ​​the green light-emitting device is larger than the light-emitting area of ​​the red light-emitting device; the roughness of the central area overlapping with the blue light-emitting device is smaller than the roughness of the central area overlapping with the green light-emitting device, and the roughness of the central area overlapping with the green light-emitting device is smaller than the roughness of the central area overlapping with the red light-emitting device.

[0106] In another embodiment, the light-emitting area of ​​the green light-emitting device is the same as the light-emitting area of ​​the red light-emitting device, and both are smaller than the light-emitting area of ​​the blue light-emitting device; the roughness of the central area overlapping with the blue light-emitting device is smaller than the roughness of the central area overlapping with the green light-emitting device, and the roughness of the central area overlapping with the green light-emitting device is equal to the roughness of the central area overlapping with the red light-emitting device.

[0107] In one embodiment, Figure 18 Another cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention. Figure 19 for Figure 18 The schematic diagram of the corresponding embodiment. Figure 18 As shown, a first light emitting device Pa and a second light emitting device Pb having different luminous colors are shown. The luminous area of ​​the first light emitting device Pa is larger than that of the second light emitting device Pb. The refractive index of the light adjustment unit 31a corresponding to the first light emitting device Pa is n1, and the refractive index of the light adjustment unit 31b corresponding to the second light emitting device Pb is n2, wherein n1 <n2。

[0108] like Figure 19Simplified schematic diagram showing a light-emitting device P, the interface M between the light adjustment unit and the dielectric layer, with the refractive index of the dielectric layer fixed. The incident angle of the light ray S7 on the interface M is θ5. According to the refraction law, when the refractive index of the light adjustment unit is n1, the refracted ray of the light ray S7 is S8', and the refraction angle is θ6; when the refractive index of the light adjustment unit is n2, the refracted ray of the light ray S7 is S8'', and the refraction angle is θ7; since n1 < n2, then θ6 < θ7. It can also be seen from the figure that the angle between the propagation direction of the light ray S8' and the direction e is smaller than the angle between the propagation direction of the light ray S8'' and the direction e. It can be seen that the smaller the refractive index of the light adjustment unit, the smaller the angle between the refracted ray emitted after its interface with the dielectric layer and the direction e. That is to say, the smaller the refractive index of the light adjustment unit, the better its ability to adjust the optical path of the large-angle light emitted by the light-emitting device. In the embodiment of the present invention, n1 < n2, so the ability of the light adjustment unit 31a to adjust the optical path of the large-angle light is better than that of the light adjustment unit 31b, thereby enabling the increase in the light output efficiency of the first light-emitting device Pa to be greater than the increase in the light output efficiency of the second light-emitting device Pb, and further enabling the difference in the light emission efficiency between different color light-emitting devices to be balanced by adjusting the increase in the light output efficiency of different color light-emitting devices.

[0109] Specifically, in one embodiment, the light-emitting area of the blue light-emitting device is larger than the light-emitting area of the green light-emitting device, and the light-emitting area of the green light-emitting device is larger than the light-emitting area of the red light-emitting device; the refractive index of the light adjustment unit corresponding to the blue light-emitting device is less than the refractive index of the light adjustment unit corresponding to the green light-emitting device, and the refractive index of the light adjustment unit corresponding to the green light-emitting device is less than the refractive index of the light adjustment unit corresponding to the red light-emitting device.

[0110] In another embodiment, the light-emitting area of the green light-emitting device is the same as the light-emitting area of the red light-emitting device, and both are smaller than the light-emitting area of the blue light-emitting device; the refractive index of the light adjustment unit corresponding to the blue light-emitting device is less than the refractive index of the light adjustment unit corresponding to the green light-emitting device, and the refractive index of the light adjustment unit corresponding to the green light-emitting device is equal to the refractive index of the light adjustment unit corresponding to the red light-emitting device.

[0111] In another embodiment, the refractive index of the light adjustment unit corresponding to the blue light-emitting device is less than the refractive index of the light adjustment unit corresponding to the green light-emitting device, and the refractive index of the light adjustment unit corresponding to the green light-emitting device is less than the refractive index of the light adjustment unit corresponding to the red light-emitting device. By adjusting the increase in the light output efficiency of different color light-emitting devices to balance the difference in the light emission efficiency between different color light-emitting devices, further set the light-emitting areas of the blue light-emitting device, the red light-emitting device, and the green light-emitting device to be the same in this embodiment. During production, different color light-emitting devices can be fabricated using the same set of mask plates, which can simplify the manufacturing process.

[0112] Furthermore, in some embodiments, after improving the light extraction efficiency of the blue light emitting device by adjusting the refractive index of the light adjustment unit corresponding to the blue light emitting device, the light emitting brightness of the blue light emitting device can be lowered accordingly, thereby increasing the service life of the blue light emitting device.

[0113] It should be noted that the embodiments of the present invention do not impose any limitation on the arrangement of the light-emitting devices in the display panel, and the arrangement of the light-emitting devices in the top views involved in some of the above embodiments is merely a schematic representation.

[0114] Based on the same inventive concept, an embodiment of the present invention further provides a display device, Figure 20 A schematic diagram of a display device provided by an embodiment of the present invention, such as Figure 20 As shown, the display device includes the display panel 10 provided by any embodiment of the present invention. Figure 20 The display device shown is for illustration only. The display device may be any electronic device with a display function, such as a vehicle-mounted display device, a mobile phone, a tablet computer, a laptop computer, an e-reader or a television, a wearable mobile phone or a watch.

[0115] Based on the same inventive concept, an embodiment of the present invention further provides a method for manufacturing a display panel, which is used to manufacture the display panel provided by an embodiment of the present invention. Figure 21 The manufacturing method of the display panel provided by the embodiment of the present invention is as follows Figure 1 , Figure 22 The manufacturing method of the display panel provided by the embodiment of the present invention is as follows Figure 2 .like Figure 21 As shown, the production method includes:

[0116] Step S101: providing a base substrate 101;

[0117] Step S102: A light-emitting device layer 102 is fabricated on the base substrate 101. The light-emitting device layer 102 includes a plurality of light-emitting devices P (only two are shown in the figure). The light-emitting devices P may be organic light-emitting devices or micro diodes, which are only shown in the figure for simplified illustration.

[0118] The light regulating structure layer 103 is formed on a side of the light emitting device layer 102 away from the base substrate 101, specifically comprising:

[0119] Step S103: using an inkjet printing process to produce a plurality of light adjustment unit precursors T;

[0120] Step S104: Evaporate the solvent to obtain multiple light adjustment units 31, each light adjustment unit 31 includes a dimming section F, each light adjustment unit 31 includes a through hole K, the through hole K passes through the light adjustment unit 31 in a direction perpendicular to the substrate direction e, the through hole K overlaps with the light-emitting device P, and the dimming section F is arranged around the through hole K. For one light adjustment unit 31, the thickness of the dimming section F gradually increases in the direction from the through hole K to the dimming section F.

[0121] like Figure 22 As shown, Figure 22 The diagram shows a top view of the manufacturing process from step S103 to step S104, showing only a partial area. Light modulation units 31 are manufactured using an inkjet printing process. Ink droplets (i.e., light modulation unit precursors T) are sprayed at the corresponding locations of each light modulation unit 31. The amount of solvent evaporating from the edges of the ink droplets is much greater than the amount of liquid volume lost. Therefore, the solvent is replenished from the center to the edges, forming a capillary flow from the inside out. This causes the solute in the ink to gather at the edges. After the solvent evaporates, light modulation units 31 with through holes K are formed. The solute in the ink is the material used to manufacture the light modulation units.

[0122] Optionally, the composition of the ink used for inkjet printing can be adjusted during production to reduce the surface tension of the ink, so that during the solvent evaporation process, the solvent in the regulating unit precursor T can be more easily replenished from the central area to the edge, so that the solute is concentrated at the edge.

[0123] Step S105 : forming a dielectric layer 32 on the plurality of light adjustment units 31 , wherein the refractive index of the light adjustment units is smaller than the refractive index of the dielectric layer 32 . The dielectric layer 32 and the plurality of light adjustment units 31 together constitute the light adjustment structure layer 103 .

[0124] The manufacturing method provided by this embodiment first uses an inkjet printing process to manufacture a light regulating unit precursor. During the evaporation of the solvent in the ink, the ink in the center area of ​​the light regulating unit precursor is replenished to the edge, so that the solute in the ink gathers at the edge of the regulating unit precursor. After the solvent evaporates, a light regulating unit with a through hole is formed. Then, a dielectric layer is manufactured on the light regulating unit, and finally a light regulating structure layer composed of the dielectric layer and multiple light regulating units is formed. The refractive index of the light regulating unit is less than that of the dielectric layer, and the manufacturing process of the light regulating structure layer is simple. In addition, in the display panel manufactured by this embodiment, the light regulating structure layer is manufactured on the light emitting device layer, which can adjust the optical path of the large-angle light emitted by the light emitting device, reduce the angle between this part of the light and the direction perpendicular to the display panel, thereby reducing the probability of this part of the light being totally reflected at the film layer interface within the display panel or at the interface between the display panel and the air, which can improve the light extraction efficiency of the light emitting device, thereby reducing the power consumption of the display panel.

[0125] In one embodiment, Figure 23 The manufacturing method of the display panel provided by the embodiment of the present invention is as follows Figure 3 ,like Figure 23 As shown, the production method includes:

[0126] Step S201: providing a base substrate.

[0127] Step S202: manufacturing a light-emitting device layer on the base substrate, wherein the light-emitting device layer includes a plurality of light-emitting devices.

[0128] Step S203: forming a pre-contact layer on the light-emitting device layer.

[0129] Step S204: Pre-treating the surface of the pre-contact layer away from the substrate to form a contact layer. The contact layer includes multiple central regions and peripheral regions surrounding the central regions. The central regions overlap with the light-emitting devices in a direction perpendicular to the substrate. The central regions and peripheral regions formed after pre-treating have different properties. Optionally, the surface energy of the central regions is lower than that of the peripheral regions; or the roughness of the central regions is lower than that of the peripheral regions.

[0130] Step S205: using an inkjet printing process to produce a plurality of light modulation unit precursors on the pre-contact layer;

[0131] Step S206: Evaporate the solvent to obtain a plurality of light adjustment units, each light adjustment unit including a dimming section, each light adjustment unit including a through hole, the through hole passing through the light adjustment unit in a direction perpendicular to the substrate, the through hole overlapping with the light-emitting device, the dimming section being arranged around the through hole, and for one light adjustment unit, the thickness of the dimming section gradually increases in the direction from the through hole to the dimming section.

[0132] Step S207: manufacturing a dielectric layer on the plurality of light adjustment units, wherein the refractive index of the light adjustment unit is smaller than the refractive index of the dielectric layer.

[0133] The display panel manufactured by this embodiment can refer to the above Figure 15 and Figure 16 In this embodiment, a pre-contact layer is first produced before the light regulating structure layer is produced, and the surface of the pre-contact layer away from the substrate is pre-treated to form a contact layer. Accordingly, a central area and a peripheral area with different characteristics are formed in the contact layer. The difference in characteristics between the central area and the peripheral area can play an auxiliary role in the formation process of the light regulating unit.

[0134] Furthermore, step S205 utilizes an inkjet printing process to produce a plurality of light-adjusting unit precursors, including light-adjusting unit precursors covering a central region and at least a portion of a peripheral region. This embodiment ensures that the through-holes of the light-adjusting units formed after the solvent in the light-adjusting unit precursors evaporates overlap with the light-emitting devices, and that the light-adjusting units do not overlap with the light-emitting devices in a direction perpendicular to the substrate. This ensures that the light-adjusting structure layer only adjusts the optical path of the larger-angle light emitted by the light-emitting devices, without changing the optical path of the smaller-angle light emitted by the light-emitting devices, thereby avoiding adverse effects of the adjustment on the optical path of the smaller-angle light.

[0135] In one embodiment, the surface energy of the central area is smaller than that of the peripheral area. After the light adjustment unit precursor is made by inkjet printing, the central area is not easily wetted by ink droplets, while the peripheral area is more easily wetted by ink droplets than the central area. During the evaporation of the solvent in the light adjustment unit precursor, the ink in the central area is more likely to gather toward the peripheral area, and after the solvent evaporates, a light adjustment unit with a through hole is formed. The formation of a central area and a peripheral area with different surface energies after pretreatment can play an auxiliary role in the production process of the light adjustment unit. The size of the surface energy difference between the central area and the peripheral area can be adjusted by adjusting the pretreatment process parameters, thereby achieving control over the size of the through hole area in the light adjustment unit. In the display panel, multiple light-emitting devices include red light-emitting devices, green light-emitting devices, and blue light-emitting devices. By adopting this embodiment, it is possible to achieve, according to design requirements, the production of through holes with different areas overlapping with light-emitting devices of different colors.

[0136] Specifically, step S204 pre-treats the surface of the pre-contact layer away from the substrate to form a contact layer, including any of the following:

[0137] The surface of the pre-contact layer is pretreated using a plasma treatment process to form multiple central regions and peripheral regions. The plasma treatment process can increase the surface energy of the film layer, dividing the surface of the pre-contact layer into a first pre-treated region and a second pre-treated region. In a direction perpendicular to the substrate, the first pre-treated region overlaps with the light-emitting device, and the second pre-treated region surrounds the first pre-treated region. Only the second pre-treated region is pre-treated using the plasma treatment process to increase the surface energy to form the peripheral region, while the first pre-treated region is not pre-treated to form the central region.

[0138] The surface of the pre-contact layer is pretreated using a UV process to form multiple central and peripheral areas. The UV process increases the surface energy of the film layer, dividing the surface of the pre-contact layer into a first pre-treated area and a second pre-treated area. In a direction perpendicular to the substrate, the first pre-treated area overlaps the light-emitting device, while the second pre-treated area surrounds the first pre-treated area. Only the second pre-treated area is pre-treated using the UV process to increase the surface energy and form the peripheral area. The first pre-treated area is not pre-treated to form the central area.

[0139] The surface of the pre-contact layer is pretreated using a hydrophilic or hydrophobic process to form multiple central areas and peripheral areas. The surface of the pre-contact layer is divided into a first pre-treated area and a second pre-treated area. In a direction perpendicular to the substrate, the first pre-treated area overlaps with the light-emitting device, and the second pre-treated area surrounds the first pre-treated area. Optionally, the first pre-treated area is pre-treated using a hydrophobic process to form a central area, while the second pre-treated area is not pre-treated to form a peripheral area. Optionally, the second pre-treated area is pre-treated using a hydrophilic process to form a peripheral area, while the first pre-treated area is not pre-treated to form a central area. Optionally, the first pre-treated area is pre-treated using a hydrophobic process to form a central area, while the second pre-treated area is pre-treated using a hydrophilic process to form a peripheral area.

[0140] In another embodiment, the roughness of the central area is less than that of the peripheral area. After the light adjustment unit precursor is made by inkjet printing, the central area is not easily wetted by ink droplets, while the peripheral area is more easily wetted by ink droplets than the central area. During the evaporation of the solvent in the light adjustment unit precursor, the ink in the central area is more likely to gather toward the peripheral area, and a light adjustment unit with through holes is formed after the solvent evaporates. The formation of central and peripheral areas with different roughness after pretreatment can play an auxiliary role in the production process of the light adjustment unit, and the size of the roughness difference between the central and peripheral areas can be adjusted by adjusting the pretreatment process parameters, thereby achieving control over the area size of the through holes in the light adjustment unit. In the display panel, multiple light-emitting devices include red light-emitting devices, green light-emitting devices, and blue light-emitting devices. By adopting this embodiment, it is possible to achieve, according to design requirements, the production of through holes with different areas overlapping with light-emitting devices of different colors.

[0141] Specifically, step S204 pre-treats the surface of the pre-contact layer away from the substrate to form a contact layer, including: forming a nanocrystalline layer on the pre-contact layer to form multiple central regions and peripheral regions. The greater the density of nanoparticles in the nanocrystalline layer, the smaller the surface roughness. The surface of the pre-contact layer is divided into a first pre-treated region and a second pre-treated region. In a direction perpendicular to the substrate, the first pre-treated region overlaps with the light-emitting device, and the second pre-treated region surrounds the first pre-treated region. A nanocrystalline layer with a higher density is formed in the first pre-treated region to form a central region, and a nanocrystalline layer with a lower density is formed in the second pre-treated region to form a peripheral region.

[0142] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0143] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that: include: substrate; a light-emitting device layer, located on the base substrate, the light-emitting device layer including a plurality of light-emitting devices; a light-regulating structure layer, located on a side of the light-emitting device layer away from the base substrate, comprising a light-regulating unit, the light-regulating unit comprising a through hole, the through hole overlapping the light-emitting device; the light-regulating unit comprising a dimming subdivision, the dimming subdivision being arranged around the through hole, the thickness of the dimming subdivision gradually increasing in a direction from the through hole to the dimming subdivision; a dielectric layer covering the light adjustment unit; the refractive index of the light adjustment unit is smaller than the refractive index of the dielectric layer; The light emitting device comprises a first light emitting device and a second light emitting device having different light emitting colors, wherein the light emitting area of ​​the first light emitting device is larger than the light emitting area of ​​the second light emitting device; The light adjustment unit includes a first light adjustment unit and a second light adjustment unit, the first light adjustment unit includes a first through hole, and the second light adjustment unit includes a second through hole; The first light emitting device overlaps with the first through hole, and the second light emitting device overlaps with the second through hole; wherein, Taking the direction perpendicular to the substrate as the vertical direction, the horizontal distance between the inner side of the first light adjustment unit and the outer edge of the first light emitting device is h1, and the horizontal distance between the inner side of the second light adjustment unit and the outer edge of the second light emitting device is h2; h1>h2.

2. The display panel according to claim 1, wherein: The first light emitting device is a blue light emitting device, and the second light emitting device is a red light emitting device; or, The first light emitting device is a blue light emitting device, and the second light emitting device is a green light emitting device; or, The first light emitting device is a green light emitting device, and the second light emitting device is a red light emitting device.

3. The display panel according to claim 1, wherein: The display panel further includes a dielectric layer covering the light adjustment unit; wherein, The interface between the dimming section and the dielectric layer is an arc-shaped surface.

4. The display panel according to claim 3, wherein: The interface between the dimming portion and the dielectric layer is a convex surface that protrudes from the light emitting device layer toward a side away from the base substrate.

5. The display panel according to claim 1, wherein: The light adjustment unit includes a first surface away from the base substrate, and the first surface is convex toward the side away from the base substrate.

6. The display panel according to claim 1, wherein: The orthographic projection of the light adjustment unit on the base substrate is annular.

7. The display panel according to claim 1, wherein: The light adjustment unit is an annular convex lens structure, and the through hole is located in the central area of ​​the annular convex lens.

8. The display panel according to claim 1, wherein: The light emitted from the edge of the first light emitting device and whose optical path can be changed by the first light adjustment unit has an output angle greater than α1, and the light emitted from the edge of the second light emitting device and whose optical path can be changed by the second light adjustment unit has an output angle greater than α2, α1>α2.

9. The display panel according to claim 1, wherein: The display panel further includes an encapsulation layer and a touch film assembly layer; The encapsulation layer and the touch film group layer are both located between the light emitting device layer and the light regulating structure layer; wherein, The encapsulation layer is located on a side of the touch film assembly layer close to the light-emitting device layer. The encapsulation layer includes at least one organic encapsulation layer and at least one inorganic encapsulation layer.

10. The display panel according to claim 1, wherein The two adjacent light adjustment units are independent of each other.

11. The display panel according to claim 1, wherein Partially adjacent two of the light adjustment units are in contact with each other.

12. The display panel according to claim 1, wherein The dielectric layer is a planarization layer.

13. A display panel, characterized in that: include: substrate; a light-emitting device layer, located on the base substrate, the light-emitting device layer including a plurality of light-emitting devices; a light-regulating structure layer, located on a side of the light-emitting device layer away from the base substrate, comprising a light-regulating unit; the light-regulating unit comprising a through hole, the through hole overlapping the light-emitting device; the light-regulating unit comprising a dimming subdivision, the dimming subdivision being arranged around the through hole, the thickness of the dimming subdivision gradually increasing in a direction from the through hole to the dimming subdivision; a dielectric layer covering the light adjustment unit; the refractive index of the light adjustment unit is smaller than the refractive index of the dielectric layer; The light emitting device comprises a first light emitting device and a second light emitting device having different light emitting colors, wherein the light emitting area of ​​the first light emitting device is larger than the light emitting area of ​​the second light emitting device; The light adjustment unit includes a first light adjustment unit and a second light adjustment unit; wherein, Taking the direction perpendicular to the substrate as the vertical direction, the horizontal distance between the inner side of the first light adjustment unit and the outer edge of the first light emitting device is h1, and the horizontal distance between the inner side of the second light adjustment unit and the outer edge of the second light emitting device is h2; wherein, h1>h2.

14. The display panel according to claim 13, wherein: The first light emitting device corresponds to the first light adjustment unit, and the second light emitting device corresponds to the second light adjustment unit; or, The first light adjustment unit surrounds the first light emitting device, and the second light adjustment unit surrounds the second light emitting device.

15. The display panel according to claim 13, wherein: The interface between the dimming section and the dielectric layer is an arc-shaped surface.

16. The display panel according to claim 15, wherein: The interface between the dimming portion and the dielectric layer is a convex surface that protrudes from the light emitting device layer toward a side away from the base substrate.

17. The display panel according to claim 13, wherein: The light adjustment unit includes a first surface away from the base substrate, and the first surface is convex toward the side away from the base substrate.

18. The display panel according to claim 13, wherein: The orthographic projection of the light adjustment unit on the base substrate is annular.

19. The display panel according to claim 13, wherein: The light adjustment unit is an annular convex lens structure.

20. A display panel, characterized in that: include: substrate; a light-emitting device layer, located on the base substrate, the light-emitting device layer including a plurality of light-emitting devices; a light-regulating structure layer, located on a side of the light-emitting device layer away from the base substrate, comprising a light-regulating unit, the light-regulating unit comprising a through hole, the through hole overlapping the light-emitting device; the light-regulating unit comprising a dimming subdivision, the dimming subdivision being arranged around the through hole, the thickness of the dimming subdivision gradually increasing in a direction from the through hole to the dimming subdivision; a dielectric layer covering the light adjustment unit; the refractive index of the light adjustment unit is smaller than the refractive index of the dielectric layer; The light emitting device comprises a first light emitting device and a second light emitting device having different light emitting colors, wherein the light emitting area of ​​the first light emitting device is larger than the light emitting area of ​​the second light emitting device; The light adjustment unit includes a first light adjustment unit and a second light adjustment unit, the first light adjustment unit includes a first through hole, and the second light adjustment unit includes a second through hole; The first light emitting device overlaps with the first through hole, and the second light emitting device overlaps with the second through hole; wherein, In a cross section formed by the same tangent line, the minimum distance between the inner side of the first light adjustment unit and the outer edge of the first light emitting device is a first distance h1, and the minimum distance between the inner side of the second light adjustment unit and the outer edge of the second light emitting device is a second distance h2; h1>h2.

21. The display panel according to claim 20, wherein: The interface between the dimming section and the dielectric layer is an arc-shaped surface.

22. The display panel according to claim 21, wherein: The interface between the dimming portion and the dielectric layer is a convex surface that protrudes from the light emitting device layer toward a side away from the base substrate.

23. The display panel according to claim 20, wherein: The light adjustment unit includes a first surface away from the base substrate, and the first surface is convex toward the side away from the base substrate.

24. The display panel according to claim 20, wherein: The orthographic projection of the light adjustment unit on the base substrate is annular.

25. The display panel according to claim 20, wherein: The light adjustment unit is an annular convex lens structure, and the through hole is located in the central area of ​​the annular convex lens.

26. A display panel, characterized in that: include: substrate; a light-emitting device layer, located on the base substrate, the light-emitting device layer including a plurality of light-emitting devices; a light-regulating structure layer, located on a side of the light-emitting device layer away from the base substrate, comprising a light-regulating unit; the light-regulating unit comprising a through hole, the through hole overlapping the light-emitting device; the light-regulating unit comprising a dimming subdivision, the dimming subdivision being arranged around the through hole, the thickness of the dimming subdivision gradually increasing in a direction from the through hole to the dimming subdivision; a dielectric layer covering the light adjustment unit; the refractive index of the light adjustment unit is smaller than the refractive index of the dielectric layer; The light emitting device comprises a first light emitting device and a second light emitting device having different light emitting colors, wherein the light emitting area of ​​the first light emitting device is larger than the light emitting area of ​​the second light emitting device; The light adjustment unit includes a first light adjustment unit and a second light adjustment unit; wherein, In a cross section formed by the same tangent line, the minimum distance between the inner side of the first light adjustment unit and the outer edge of the first light emitting device is a first distance h1, and the minimum distance between the inner side of the second light adjustment unit and the outer edge of the second light emitting device is a second distance h2; h1>h2.

27. The display panel according to claim 26, wherein: The first light emitting device corresponds to the first light adjustment unit, and the second light emitting device corresponds to the second light adjustment unit; or, The first light adjustment unit surrounds the first light emitting device, and the second light adjustment unit surrounds the second light emitting device.

28. The display panel according to claim 26, wherein: The interface between the dimming section and the dielectric layer is an arc-shaped surface.

29. The display panel according to claim 28, wherein: The interface between the dimming portion and the dielectric layer is a convex surface that protrudes from the light emitting device layer toward a side away from the base substrate.

30. The display panel according to claim 26, wherein: The light adjustment unit includes a first surface away from the base substrate, and the first surface is convex toward the side away from the base substrate.

31. The display panel according to claim 26, wherein The orthographic projection of the light adjustment unit on the base substrate is annular.

32. The display panel according to claim 26, wherein: The light adjustment unit is an annular convex lens structure.

33. A display device, characterized in that: A display panel comprising any one of claims 1-32.

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