Display panel and tiled display device

Abstract

The invention discloses a display panel and a tiled display device, relates to the technical field of display, and is used for improving the regulation and control effect of the emergent light shape of the display panel. The display panel comprises a light-emitting device layer and a light-emitting regulation and control layer, the light-emitting device layer comprises a first light-emitting device and a second light-emitting device which are different in light-emitting color, the light-emitting regulation and control layer comprises a substrate layer, and a first regulation and control structure and a second regulation and control structure which correspond to the first light-emitting device and the second light-emitting device respectively are arranged on the substrate layer. The first regulation and control structure and the second regulation and control structure are respectively made of materials with different optical characteristics; and / or, along the thickness direction of the display panel, the first section of the first regulation and control structure and the second section of the second regulation and control structure are different in shape.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel and a splicing display device. Background Technology

[0002] In related technologies, to improve the light emission pattern of a display panel, a light emission control film layer is typically applied to the display panel, and the control structure within each region of the light emission control film layer remains consistent. However, this structure has limited effectiveness in controlling the light emission pattern of the display panel. Summary of the Invention

[0003] This application provides a display panel and a splicing display device to at least improve the control effect on the light emission pattern of the display panel.

[0004] To achieve the above objectives, according to a first aspect of this application, a display panel is provided, comprising a light-emitting device layer and a light emission control layer covering the light-emitting device layer. The light-emitting device layer includes a first light-emitting device and a second light-emitting device emitting different colors. The light emission control layer includes a substrate layer, on which a first control structure and a second control structure are provided. The orthographic projection of the first control structure onto the substrate layer is located on at least one side of the orthographic projection of the first light-emitting device onto the substrate layer, and the orthographic projection of the second control structure onto the substrate layer is located on at least one side of the orthographic projection of the second light-emitting device onto the substrate layer. Wherein, the first control structure and the second control structure satisfy at least one of the following conditions: the first control structure and the second control structure are made of materials with different optical properties; and the first cross-section of the first control structure and the second cross-section of the second control structure have different shapes along the thickness direction of the display panel.

[0005] In some embodiments, the first control structure includes a first groove formed on the side of the substrate layer away from the light-emitting device layer, and the second control structure includes a second groove formed on the side of the substrate layer away from the light-emitting device layer; the cross-sectional shapes of the first groove and the second groove are different along the thickness direction of the display panel.

[0006] In some embodiments, the first groove and the second groove have different depths.

[0007] In some embodiments, the first groove and the second groove each have sidewalls of different shapes.

[0008] In some embodiments, a first receiving groove and a second receiving groove are formed on the side of the substrate layer opposite to the light-emitting device layer. The first control structure is disposed in the first receiving groove, and the second control structure is disposed in the second receiving groove. The first control structure and the second control structure are respectively made of materials with different optical properties.

[0009] In some embodiments, the optical properties include at least one of refractive index, absorbance, and haze.

[0010] In some embodiments, at least one of the first control structure and the second control structure includes a light-blocking material or a color-blocking material.

[0011] In some embodiments, the first control structure and the second control structure each comprise a transparent material, wherein the first control structure and the second control structure have different heights.

[0012] In some embodiments, the first control structure and the second control structure each include a transparent material, wherein the first control structure and the second control structure each have sidewalls of different shapes.

[0013] In some embodiments, the light-emitting device layer further includes a third light-emitting device, the emission color of which is different from that of the first light-emitting device and the second light-emitting device; a third control structure is further provided on the substrate layer, the orthographic projection of the third control structure on the substrate layer being located on at least one side of the orthographic projection of the third light-emitting device on the substrate layer; wherein, the third control structure and the first control structure satisfy at least one of the following conditions: the third control structure and the first control structure are made of materials with different optical properties; along the thickness direction of the display panel, the third cross-section of the third control structure and the first cross-section of the first control structure have different shapes.

[0014] According to a second aspect of this application, a splicing display device is provided, including a display panel as described in any embodiment of the first aspect.

[0015] In some embodiments, the splicing display device further includes a plurality of liquid crystal panels, with a splicing seam between two adjacent liquid crystal panels, and the display panel covering the splicing seam. The first light-emitting device and the second light-emitting device are light-emitting diodes or organic light-emitting diodes.

[0016] In some embodiments, the liquid crystal panel and the display panel are arranged along a first direction, in which the orthographic projection of the first control structure on the substrate is located on opposite sides of the orthographic projection of the first light-emitting device on the substrate, and the orthographic projection of the second control structure on the substrate is located on opposite sides of the orthographic projection of the second light-emitting device on the substrate.

[0017] For the display panel provided in this application embodiment, since the orthographic projection of the first control structure on the substrate layer is located on at least one side of the orthographic projection of the first light-emitting device on the substrate layer, and the orthographic projection of the second control structure on the substrate layer is located on at least one side of the orthographic projection of the second light-emitting device on the substrate layer, the first control structure and the second control structure can respectively modulate the emitted light pattern of the first light-emitting device and the second light-emitting device at their side viewing angles. Furthermore, since the first control structure and the second control structure satisfy at least one of conditions A and B, where condition A is that the first control structure and the second control structure are made of materials with different optical properties, and condition B is that the first cross-section of the first control structure and the second cross-section of the second control structure have different shapes along the thickness direction of the display panel, the first control structure and the second control structure respectively form differentiated modulation effects on the first light-emitting device and the second light-emitting device, thereby improving the modulation effect on the emitted light pattern of the display panel. When the display panel is applied to a splicing display device, since the modulation effect of the emitted light pattern of the display panel is improved, it can better match the color and brightness variation patterns of the liquid crystal panel at large viewing angles, thereby reducing the visual color difference of the splicing display device at large viewing angles, and thus improving the display uniformity of the splicing display device.

[0018] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a top view of a splicing display device provided in some embodiments of this application; Figure 2A and Figure 2B These are light emission patterns of a single light-emitting device in the display panel and the entire display panel, respectively. Figure 3 yes Figure 1 A sectional view along the A-A' direction; Figure 4 yes Figure 1 Another sectional view along the A-A' direction; Figure 5 yes Figure 1 Another sectional view along the A-A' direction; Figure 6 yes Figure 1 Another sectional view along the A-A' direction; Figure 7 It is a graph showing the change in light intensity of a single light-emitting device with viewing angle under different conditions; Figure 8 yes Figure 1 Another sectional view along the A-A' direction; Figure 9 This is a cross-sectional view of a display device provided in some embodiments of this application. Detailed Implementation

[0021] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings. The described technical solutions are for illustrative purposes only and should not be construed as limiting the scope of protection of this application.

[0022] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are only used to distinguish different technical features. The term "multiple" and similar words indicate two or more unless otherwise expressly defined.

[0023] In this application, the descriptions of the various embodiments each have their own emphasis. Parts not described in detail in a particular embodiment can be found in the relevant descriptions of other embodiments. The embodiments, implementation methods, examples, and related technical features of this application can be combined and substituted for each other without conflict.

[0024] Some embodiments of this application provide a splicing display device, such as... Figure 1As shown, the video wall display device 100 includes a plurality of liquid crystal panels 10 and a display panel 20 located between two adjacent liquid crystal panels 10. For example, at least some of the liquid crystal panels 10 are arranged along a first direction X, and a splicing seam F is provided between any two adjacent liquid crystal panels 10. The splicing seam F extends along a second direction Y, and the display panel 20 covers the splicing seam F. The display surface of the liquid crystal panels 10 is located in the main display area, and the display panel 20 is located in the splicing area. Because the display panel 20 covers the splicing seam F, the main display area and the splicing area can display continuous images, thereby improving the viewing effect of the video wall display device 100.

[0025] The liquid crystal panel 10 includes an array substrate and an opposing substrate disposed opposite each other, and a liquid crystal layer located between the array substrate and the opposing substrate.

[0026] The inventors discovered that in related technologies, light-emitting devices (such as LEDs) with different emitting colors in the display panel have different light patterns, and the light pattern emitted by the display panel is mainly affected by the light patterns of each light-emitting device in the display panel. For example... Figure 2A As shown, the light pattern of a single light-emitting device in a display panel typically resembles a batwing shape, meaning the light intensity peaks at the mid-range viewing angle (e.g., 30° to 45°) and gradually decreases towards wider viewing angles (e.g., 45° to 90°) and narrower viewing angles (e.g., 0° to 30°). Different light-emitting devices of different colors exhibit variations in the mid-range viewing angle, ultimately resulting in the light pattern of the display panel appearing as shown... Figure 2B The shape shown is significant. Furthermore, the light emission pattern of the LCD panel is primarily affected by the light emission pattern of the backlight and the transmittance of different color pixels on the LCD panel. This results in a noticeable separation of the color coordinate drift trajectories of the LCD panel and the display panel in colorimetric systems such as CIE 1931 xy or CIE 1976 u'v', leading to visible color differences and uneven brightness between the display panel and the LCD panel at oblique viewing angles. This severely affects the visual consistency of the splicing display device under different viewing angles.

[0027] Based on this, some embodiments of this application also provide a display panel 20, such as... Figures 3 to 6As shown, the display panel 20 includes a driving substrate 21, a light-emitting device layer 22 located on the driving substrate 21, and a light emission control layer 23 covering the light-emitting device layer 22. The driving substrate 21 can drive the light-emitting devices in the light-emitting device layer 22 to emit light. The light-emitting device layer 22 includes a first light-emitting device 221 and a second light-emitting device 222 emitting different colors. The light emission control layer 23 includes a base layer 231, which is made of a transparent material to ensure that the light emitted from the light-emitting device layer 22 can be smoothly emitted from the base layer 231. The base layer 231 can be made of materials such as silicone or epoxy resin. The base layer 231 covers the light-emitting device layer 22, thereby forming an encapsulation and protection for each light-emitting device in the light-emitting device layer 22. A first control structure 232 and a second control structure 233 are provided on the substrate layer 231. The orthographic projection of the first control structure 232 on the substrate layer 231 is located on at least one side of the orthographic projection of the first light-emitting device 221 on the substrate layer 231, and the orthographic projection of the second control structure 233 on the substrate layer 231 is located on at least one side of the orthographic projection of the second light-emitting device 222 on the substrate layer 231. With this configuration, the light pattern of at least one side of the first light-emitting device 221 can be modulated using the first control structure 232, and the light pattern of at least one side of the second light-emitting device 222 can be modulated using the second control structure 233, thereby achieving modulation of the light pattern of the display panel 20 at a wide viewing angle.

[0028] The first control structure 232 and the second control structure 233 satisfy at least one of conditions A and B. Condition A: The first control structure 232 and the second control structure 233 are made of materials with different optical properties. Condition B: Along the thickness direction Z of the display panel 20, the first cross-section of the first control structure 232 and the second cross-section of the second control structure 233 have different shapes. That is, the first control structure 232 and the second control structure 233 may satisfy only condition A or condition B, or they may satisfy both conditions A and B simultaneously.

[0029] For the display panel 20 provided in this application embodiment, since the orthographic projection of the first control structure 232 on the substrate 231 is located on at least one side of the orthographic projection of the first light-emitting device 221 on the substrate 231, and the orthographic projection of the second control structure 233 on the substrate 231 is located on at least one side of the orthographic projection of the second light-emitting device 222 on the substrate 231, the first control structure 232 and the second control structure 233 can respectively modulate the light emission pattern of the side viewing angle of the first light-emitting device 221 and the second light-emitting device 222. Furthermore, since the first control structure 232 and the second control structure 233 satisfy at least one of conditions A and B, where condition A is that the first control structure 232 and the second control structure 233 are made of materials with different optical properties, and condition B is that the first cross-section of the first control structure 232 and the second cross-section of the second control structure 233 have different shapes along the thickness direction Z of the display panel 20, the first control structure 232 and the second control structure 233 respectively form differentiated modulation effects on the first light-emitting device 221 and the second light-emitting device 222. This can improve the modulation effect on the light emitted from the display panel 20, so as to better match the color and brightness variation law of the liquid crystal panel 10 under a wide viewing angle, thereby reducing the visual color difference of the splicing display device 100 under a wide viewing angle, and thus improving the display uniformity of the splicing display device 100.

[0030] It should be noted that, in condition B, the difference in shape between the first section and the second section means that the shape of the first section and the shape of the second section differ in at least one of the following: size, angle, and proportion.

[0031] In some embodiments, please continue reading Figures 3 to 6 In the first direction X, the orthographic projection of the first control structure 232 onto the substrate 231 is located on opposite sides of the orthographic projection of the first light-emitting device 221 onto the substrate 231. That is, the first control structure 232 includes two control substructures, and these two substructures are located on opposite sides of the first light-emitting device 221 in the first direction X. This allows for effective modulation of the light emitted from the left and right sides of the first light-emitting device 221, thereby achieving modulation of the wide-viewing-angle light emitted from the left and right sides of the display panel 20. Furthermore, in the first direction X, the orthographic projection of the second control structure 233 onto the substrate 231 is located on opposite sides of the orthographic projection of the second light-emitting device 222 onto the substrate 231. That is, the second control structure 233 includes two control substructures, and these two substructures are located on opposite sides of the second light-emitting device 222 in the first direction X. This allows for effective modulation of the light emitted from the left and right sides of the second light-emitting device 222, thereby further modulating the wide-viewing-angle light emitted from the left and right sides of the display panel 20.

[0032] In some examples, the first light-emitting device 221 and the second light-emitting device 222 can be arranged adjacent to each other. In this case, no other light-emitting devices are placed between the first light-emitting device 221 and the second light-emitting device 222. In this example, a portion of the first control structure 232 and a portion of the second control structure 233 are located between the first light-emitting device 221 and the second light-emitting device 222 and are spaced apart. This allows for a good modulation effect on the emitted light patterns of the first light-emitting device 221 and the second light-emitting device 222, respectively.

[0033] In some examples, along the first direction X, the size of the orthographic projection of the first control structure 232 onto the substrate 231 can be the same as the size of the orthographic projection of the second control structure 233 onto the substrate 231. Of course, in other examples, the size of the orthographic projection of the first control structure 232 onto the substrate 231 can be different from the size of the orthographic projection of the second control structure 233 onto the substrate 231, and the embodiments of this application are not limited in this regard.

[0034] In some embodiments, such as Figure 3 and Figure 4 As shown, the first control structure 232 includes a first groove K1 formed on the side of the substrate layer 231 away from the light-emitting device layer 22, and the second control structure 233 includes a second groove K2 formed on the side of the substrate layer 231 away from the light-emitting device layer 22. The cross-sectional shapes of the first groove K1 and the second groove K2 are different along the thickness direction Z of the display panel 20.

[0035] In this case, the first groove K1 and the second groove K2 are not filled. The light emitted by the first light-emitting device 221 first enters the substrate layer 231. Some of the light passes through the first groove K1 and exits into the air. The refractive index of the air is different from that of the substrate layer 231, which causes the light emitted through the first groove K1 to be deflected, thereby modulating the light pattern emitted by the first light-emitting device 221. Because the cross-sectional shapes of the first groove K1 and the second groove K2 are different, the light emitted by the first light-emitting device 221 and exiting through the first groove K1 and the light emitted by the second light-emitting device 222 and exiting through the second groove K2 are different in terms of light output or deflection angle. This results in the first control structure 232 creating a differentiated modulation effect on the light output shape of the first light-emitting device 221 and the second control structure 233 creating a differentiated modulation effect on the light output shape of the second light-emitting device 222. This improves the matching effect of the light output shape of the two display panels 20 with the color and brightness variation law of the liquid crystal panel 10 at a wide viewing angle, thereby reducing the visual color difference of the splicing display device 100 at a wide viewing angle and improving the display uniformity of the splicing display device 100.

[0036] In some examples, please refer to Figure 3The depth H1 of the first groove K1 is different from the depth H2 of the second groove K2.

[0037] In this case, the total amount of light emitted by the first light-emitting device 221 and emitted through the first groove K1 is different from the total amount of light emitted by the second light-emitting device 222 and emitted through the second groove K2. This results in the first control structure 232 creating a differentiated modulation effect on the light emitted by the first light-emitting device 221 and the second control structure 233 creating a differentiated modulation effect on the light emitted by the second light-emitting device 222. This improves the matching effect of the light emitted by the display panel 20 on the color and brightness variation law of the liquid crystal panel 10 under a wide viewing angle, thereby reducing the visual color difference of the splicing display device 100 under a wide viewing angle.

[0038] In some examples, please refer to Figure 4 The first groove K1 and the second groove K2 have sidewalls with different shapes.

[0039] As an example, the sidewall of the first groove K1 is one of a straight line, a broken line, and an arc, and the sidewall of the second groove K2 is another one of a straight line, a broken line, and an arc. For example, the sidewall of the first groove K1 is straight, while the sidewall of the second groove K2 is arc. Of course, the sidewalls of both the first groove K1 and the second groove K2 can be straight, but their slopes are different. Alternatively, the sidewalls of both the first groove K1 and the second groove K2 can be arc, but their curvatures are different.

[0040] Because the shape of the sidewall of the first groove K1 is different from that of the sidewall of the second groove K2, the deflection degree of the light emitted by the first light-emitting device 221 and emitted through the first groove K1 is different from that of the light emitted by the second light-emitting device 222 and emitted through the second groove K2. This results in a differentiated modulation effect between the first control structure 232 and the second control structure 233 on the light emitted by the second light-emitting device 222. This improves the matching effect of the light emitted by the display panel 20 on the color and brightness variation law of the liquid crystal panel 10 under a wide viewing angle, thereby reducing the visual color difference of the splicing display device 100 under a wide viewing angle.

[0041] In some examples, the depth H1 of the first groove K1 is different from the depth H2 of the second groove K2, and the shape of the sidewall of the first groove K1 is different from the shape of the sidewall of the second groove K2. This can further differentiate the modulation effect on the light emission pattern of the first light-emitting device 221 and the light emission pattern of the second light-emitting device 222, thereby improving the effect of improving the visual color difference of the splicing display device 100 at a wide viewing angle.

[0042] In some embodiments, such as Figure 5 and Figure 6 As shown, the substrate layer 231 has a first receiving groove K3 and a second receiving groove K4 on the side opposite to the light-emitting device layer 22. The first control structure 232 is disposed in the first receiving groove K3, and the second control structure 233 is disposed in the second receiving groove K4. The first control structure 232 and the second control structure 233 are respectively made of materials with different optical properties.

[0043] In this case, by creating accommodating grooves (such as the first accommodating groove K3 and the second accommodating groove K4) on the substrate layer 231 to accommodate the control structure (such as the first control structure 232 and the second control structure 233), the control structure can be effectively fixed, avoiding the problem of easy peeling. In addition, since the first accommodating groove K3 and the second accommodating groove K4 are located on the side of the substrate layer 231 away from the light-emitting device layer 22, this is beneficial to the fabrication of the first accommodating groove K3 and the second accommodating groove K4. For example, in the fabrication process of the light-emitting control layer 23, an encapsulation layer can be formed on the light-emitting device layer 22 first, and then the encapsulation layer can be patterned (for example, by laser cutting, blade cutting, water jet cutting, exposure development or nanoimprinting) to form a substrate layer 231 with the first accommodating groove K3 and the second accommodating groove K4. Then, the first control structure 232 and the second control structure 233 are filled into the first accommodating groove K3 and the second accommodating groove K4 respectively, thereby completing the fabrication of the light-emitting control layer 23.

[0044] In addition, in this example, by controlling the depth of the receiving groove, the distance between the control structure and the corresponding light-emitting device (such as the first light-emitting device 221 or the second light-emitting device 222) in the thickness direction Z of the display panel 20 can be effectively controlled, thereby better controlling the light emission pattern of the light-emitting device.

[0045] In some embodiments, the optical properties include at least one of refractive index, absorbance, and haze.

[0046] In some examples, the materials of the first control structure 232 and the second control structure 233 have different refractive indices. In this case, the light emitted by the first light-emitting device 221 first enters the substrate layer 231, and some of the light exits after passing through the first control structure 232. The refractive index of the first control structure 232 differs from that of the substrate layer 231, causing the light emitted through the first control structure 232 to be deflected, thereby modulating the emitted light pattern of the first light-emitting device 221. Because the materials of the first control structure 232 and the second control structure 233 have different refractive indices, the light emitted by the first light-emitting device 221 and exiting through the first control structure 232 differs from the light emitted by the second light-emitting device 222 and exiting through the second control structure 233 in terms of deflection angle. This results in a differentiated modulation effect between the first control structure 232 on the emitted light pattern of the first light-emitting device 221 and the second control structure 233 on the emitted light pattern of the second light-emitting device 222.

[0047] In some examples, the materials of the first control structure 232 and the second control structure 233 have different absorbances. In this case, the light emitted by the first light-emitting device 221 first enters the substrate layer 231, and a portion of the light is at least partially absorbed when passing through the first control structure 232, thereby modulating the emitted light pattern of the first light-emitting device 221. Because the materials of the first control structure 232 and the second control structure 233 have different absorbances, the amount of light emitted by the first light-emitting device 221 and exiting through the first control structure 232 is different from the amount of light emitted by the second light-emitting device 222 and exiting through the second control structure 233. This results in a differentiated modulation effect between the first control structure 232 on the emitted light pattern of the first light-emitting device 221 and the second control structure 233 on the emitted light pattern of the second light-emitting device 222.

[0048] In some examples, the materials of the first control structure 232 and the second control structure 233 have different haze levels. In this case, the light emitted by the first light-emitting device 221 first enters the substrate layer 231, and a portion of the light is scattered after passing through the first control structure 232, thereby modulating the emitted light pattern of the first light-emitting device 221. Because the materials of the first control structure 232 and the second control structure 233 have different haze levels, the light emitted by the first light-emitting device 221 and passing through the first control structure 232 and the light emitted by the second light-emitting device 222 and passing through the second control structure 233 are scattered to different degrees, resulting in differentiated modulation effects between the first control structure 232 on the emitted light pattern of the first light-emitting device 221 and the second control structure 233 on the emitted light pattern of the second light-emitting device 222.

[0049] In some embodiments, at least one of the first control structure 232 and the second control structure 233 includes a light-blocking material or a color-blocking material.

[0050] In some examples, at least one of the first control structure 232 and the second control structure 233 includes a light-shielding material, which can be used to block the light from the corresponding light-emitting device within a certain angle range, thereby achieving modulation of the light emitted by the light-emitting device.

[0051] Furthermore, when both the first control structure 232 and the second control structure 233 include light-shielding materials, by controlling the heights of the first control structure 232 and the second control structure 233, differentiated modulation effects can be achieved, whereby the first control structure 232 modulates the light emission pattern of the first light-emitting device 221 and the second control structure 233 modulates the light emission pattern of the second light-emitting device 222. Moreover, the light-shielding materials can reduce crosstalk between the first light-emitting device 221 and the second light-emitting device 222, thereby improving the display effect of the display panel 20.

[0052] The light-shielding material can be a metallic material, such as elemental metals like chromium or nickel, or their oxides. It can also be an organic material. For example, the light-shielding material can be a black photoresist or a carbon nanotube-dispersed resin. When the light-shielding material is a carbon nanotube-dispersed resin, it can effectively dissipate the heat generated by the light-emitting device during operation, thereby improving the reliability and lifespan of the device.

[0053] In some examples, at least one of the first control structure 232 and the second control structure 233 includes a color resist material that can selectively transmit light of a specific wavelength. Thus, light emitted by the corresponding light-emitting device and passing through the color resist material can be selectively transmitted through the color resist material, thereby achieving modulation of the light emitted by the light-emitting device.

[0054] Furthermore, the first control structure 232 and the second control structure 233 can use the same color resist material or different color resist materials, as long as the first control structure 232 can achieve a different modulation effect on the light emitted by the first light-emitting device 221 and the second control structure 233 can achieve a different modulation effect on the light emitted by the second light-emitting device 222. This application embodiment does not limit this.

[0055] In some embodiments, the first control structure 232 and the second control structure 233 each include a transparent material. The transparent materials included in the first control structure 232 and the second control structure 233 may be the same or different. When the first control structure 232 and the second control structure 233 include the same transparent material, the refractive index of this transparent material is different from the refractive index of the substrate layer 231, thereby enabling a change in the path of light to modulate the emitted light pattern of the corresponding light-emitting device. When the first control structure 232 and the second control structure 233 include different transparent materials, the refractive indices of the first control structure 232 and the second control structure 233 may be different, thereby achieving differentiated modulation effects between the first control structure 232 on the emitted light pattern of the first light-emitting device 221 and the second control structure 233 on the emitted light pattern of the second light-emitting device 222.

[0056] like Figure 6 As shown, the first control structure 232 and the second control structure 233 satisfy at least one of conditions C and D. Condition C: The height H3 of the first control structure 232 and the height H4 of the second control structure 233 are different. Condition D: The first control structure 232 and the second control structure 233 each have sidewalls with different shapes.

[0057] In this case, the first modulation structure 232 can achieve a differential modulation effect on the light emission pattern of the first light-emitting device 221 and the second modulation structure 233 can achieve a differential modulation effect on the light emission pattern of the second light-emitting device 222 by condition C or condition D.

[0058] It is worth noting that, in condition D, the sidewall shape of the first regulating structure 232 can be the same as the sidewall shape of the first receiving groove K3, while the sidewall shape of the second regulating structure 233 can be the same as the sidewall shape of the second receiving groove K4. The sidewall shapes of the first receiving groove K3 and the second receiving groove K4 can be set with reference to the sidewall shapes of the first groove K1 and the second groove K2 in the above related embodiments, respectively, and will not be elaborated here.

[0059] To further illustrate the effects of changes in the depth and sidewall shape of the first groove K1, the height and sidewall shape of the first control structure 232, and the influence of not filling the first groove K1 and filling the first receiving groove K3 with the first control structure 232 (made of black photoresist BM material) on the light emission pattern of light-emitting devices (such as 542 nm green Micro LEDs) in the above embodiments of this application, such as... Figure 7 As shown in the two curves on the right, the first groove K1 is a rectangular groove or a trapezoidal groove (the shape of the trapezoidal groove can be referenced). Figure 4When considering the shape of the second groove K2, as the depth of the first groove K1 gradually increases from 50 μm to 150 μm, the emitted light pattern of the light-emitting device exhibits significant changes in the viewing angle ranges of 15° to 55° and 55° to 75°. Furthermore, even with the same depth in the first groove K1, the emitted light pattern also changes due to the alteration of the sidewall shape of the first groove K1. For example... Figure 7 As shown in the two curves on the left, the first receiving groove K3 is filled with a first control structure 232 made of black photoresist BM material. When the first receiving groove K3 is a rectangular or trapezoidal groove, as the depth of the first receiving groove K3 (i.e., the height of the first control structure 232) gradually increases from 50μm to 150μm, the light emission pattern of the light-emitting device shows a relatively significant change in the viewing angle range of 45° to 75°. Furthermore, when the first receiving groove K3 has the same depth, the light emission pattern of the light-emitting device also changes due to the change in the sidewall shape of the first receiving groove K3. In addition, as... Figure 7 As shown in the two curves on the upper side, when the first groove K1 and the first receiving groove K3 have the same depth and shape, the first control structure 232 made of black photoresist BM material will cause the light emission pattern of the light-emitting device to change if the first groove K1 is not filled and the first receiving groove K3 is filled.

[0060] In some examples, one of the first light-emitting device 221 and the second light-emitting device 222 is a red light-emitting device that emits red light, and the other is a blue light-emitting device that emits blue light; or, one of the first light-emitting device 221 and the second light-emitting device 222 is a red light-emitting device that emits red light, and the other is a green light-emitting device that emits green light; or, one of the first light-emitting device 221 and the second light-emitting device 222 is a blue light-emitting device that emits blue light, and the other is a green light-emitting device that emits green light.

[0061] In other examples, the first light-emitting device 221 and the second light-emitting device 222 may also be a yellow light-emitting device that emits yellow light, a cyan light-emitting device that emits cyan light, or a white light-emitting device that emits white light, respectively. The embodiments of this application are not limited in this respect.

[0062] In some embodiments, such as Figure 8As shown, the light-emitting device layer 22 also includes a third light-emitting device 223, the color of which is different from that of the first light-emitting device 221 and the second light-emitting device 222. A third control structure 234 is also provided on the substrate layer 231, and the orthographic projection of the third control structure 234 onto the substrate layer 231 is located on at least one side of the orthographic projection of the third light-emitting device 223 onto the substrate layer 231. For example, in the first direction X, the orthographic projection of the third control structure 234 onto the substrate layer 231 is located on opposite sides of the orthographic projection of the third light-emitting device 223 onto the substrate layer 231.

[0063] In this embodiment, the third control structure 234 and the first control structure 232 satisfy at least one of the following conditions: the third control structure 234 and the first control structure 232 are made of materials with different optical properties; along the thickness direction Z of the display panel 20, the third cross-section of the third control structure 234 and the first cross-section of the first control structure 232 have different shapes. The conditions that the third control structure 234 and the first control structure 232 need to satisfy can be set with reference to conditions A and B in the above-mentioned related embodiments, and will not be repeated here.

[0064] In some examples, the light emitted by the first light-emitting device 221, the second light-emitting device 222, and the third light-emitting device 223 can be mixed to form white light.

[0065] In some examples, the display panel 20 is an organic light-emitting diode (OLED) display panel, in which case the light-emitting devices in the display panel 20 (such as the first light-emitting device 221, the second light-emitting device 222, and the third light-emitting device 223 described above) are organic light-emitting diodes. Alternatively, the display panel 20 may also be a light-emitting diode (LED) display panel, in which case the light-emitting devices in the display panel 20 (such as the first light-emitting device 221, the second light-emitting device 222, and the third light-emitting device 223 described above) are light-emitting diodes (e.g., Mini LED or Micro LED).

[0066] Some embodiments of this application also provide a display device, such as... Figure 9 As shown, the display device 200 includes the splicing display device 100 described in any of the above embodiments.

[0067] Since the display device 200 includes the splicing display device 100, it has the same technical effects as the splicing display device 100 described above, which will not be repeated here.

[0068] In some examples, the splicing display device 100 can serve as a display module of the display device 200, which may also include a driving module for driving the display of the splicing display device 100.

[0069] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display panel, characterized in that, The device includes a light-emitting device layer and a light-emitting control layer covering the light-emitting device layer. The light-emitting device layer includes a first light-emitting device and a second light-emitting device with different emission colors. The light-emitting control layer includes a substrate layer. A first control structure and a second control structure are provided on the substrate layer. The orthographic projection of the first control structure on the substrate layer is located on at least one side of the orthographic projection of the first light-emitting device on the substrate layer. The orthographic projection of the second control structure on the substrate layer is located on at least one side of the orthographic projection of the second light-emitting device on the substrate layer. Wherein, the first control structure and the second control structure satisfy at least one of the following conditions: The first control structure and the second control structure are made of materials with different optical properties; Along the thickness direction of the display panel, the first cross-section of the first control structure and the second cross-section of the second control structure have different shapes.

2. The display panel according to claim 1, characterized in that, The first control structure includes a first groove formed on the side of the substrate layer away from the light-emitting device layer, and the second control structure includes a second groove formed on the side of the substrate layer away from the light-emitting device layer. Along the thickness direction of the display panel, the cross-sectional shapes of the first groove and the second groove are different.

3. The display panel according to claim 2, characterized in that, The first groove and the second groove have different depths; and / or The first groove and the second groove each have sidewalls with different shapes.

4. The display panel according to claim 1, characterized in that, The substrate layer has a first receiving groove and a second receiving groove on the side opposite to the light-emitting device layer. The first control structure is disposed in the first receiving groove and the second control structure is disposed in the second receiving groove. The first control structure and the second control structure are respectively made of materials with different optical properties.

5. The display panel according to claim 4, characterized in that, The optical properties include at least one of refractive index, absorbance, and haze.

6. The display panel according to claim 4, characterized in that, At least one of the first control structure and the second control structure includes a light-blocking material or a color-blocking material.

7. The display panel according to claim 4, characterized in that, The first control structure and the second control structure each include a transparent material, wherein, The first control structure and the second control structure have different heights; and / or The first control structure and the second control structure each have sidewalls with different shapes.

8. The display panel according to any one of claims 1-7, characterized in that, The light-emitting device layer also includes a third light-emitting device, the light-emitting color of which is different from that of the first light-emitting device and the second light-emitting device; The substrate layer is further provided with a third control structure, and the orthographic projection of the third control structure on the substrate layer is located on at least one side of the orthographic projection of the third light-emitting device on the substrate layer; Wherein, the third control structure and the first control structure satisfy at least one of the following conditions: The third control structure and the first control structure are respectively made of materials with different optical properties; Along the thickness direction of the display panel, the third cross-section of the third control structure has a different shape than the first cross-section of the first control structure.

9. A splicing display device, characterized in that, The display panel includes any one of claims 1-8.

10. The splicing display device according to claim 9, characterized in that, It also includes multiple liquid crystal panels, with a splicing seam between two adjacent liquid crystal panels, and the display panel covers the splicing seam. The first light-emitting device and the second light-emitting device are light-emitting diodes or organic light-emitting diodes.

11. The splicing display device according to claim 10, characterized in that, The liquid crystal panel and the display panel are arranged along a first direction. In the first direction, the orthographic projection of the first control structure on the substrate is located on opposite sides of the orthographic projection of the first light-emitting device on the substrate, and the orthographic projection of the second control structure on the substrate is located on opposite sides of the orthographic projection of the second light-emitting device on the substrate.

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