Display device

Abstract

A display device is disclosed. The display device includes a display panel, a light-emitting plate, and a light-diffusing structure. The light-diffusing structure is located between the light-emitting plate and the display panel. The light-emitting plate includes a substrate and light-emitting units. The maximum dimension of each light-emitting unit in the direction parallel to the substrate is no greater than 3 mm. The center line connecting four adjacent light-emitting units forms a parallelogram. Any two light-emitting units are arranged adjacent to each other. The center line connecting the two farthest light-emitting units forming the parallelogram passes through two first points on the adjacent edges of the two light-emitting units. The distance between the two first points is a first distance D1. The angle between the outermost ray emitted by the light-emitting unit and the plane parallel to the substrate is θ. The minimum distance between the adjacent surfaces of the display panel and the substrate is no less than D1*tanθ / 2. This display device can achieve good high dynamic range lighting rendering effects while maintaining a relatively thin thickness.

Description

[0001] This application is a divisional application of Chinese Patent Application No. 202111649830.3, filed on December 31, 2021, entitled "Display Device". Technical Field

[0002] At least one embodiment of this disclosure relates to a display device. Background Technology

[0003] Display systems are demanding increasingly higher performance in areas such as pixel density (PPI), resolution, and high dynamic range (HDR). To maintain a competitive edge, LCD monitors need to reduce the size of the light-emitting diodes (LEDs) used as backlights, which can help improve related display performance.

[0004] Mini LEDs or micro LEDs can be used as backlights. When Mini LEDs or Micro LEDs are combined with traditional LCD panels as backlights, by controlling the brightness of the Mini LEDs or Micro LEDs to match the grayscale displayed by the display panel, the LCD device can achieve a contrast ratio comparable to that of an organic light-emitting diode (OLED) display device. Summary of the Invention

[0005] At least one embodiment of this disclosure provides a display device.

[0006] At least one embodiment of this disclosure provides a display device including a display panel, a light-emitting plate, and a light-diffusing structure. The light-emitting plate is located on the non-display side of the display panel and is stacked with the display panel; the light-diffusing structure is located between the light-emitting plate and the display panel. The light-emitting plate includes a substrate and a plurality of light-emitting units disposed on the substrate. At least one light-emitting unit has a maximum dimension of no more than 3 mm in a direction parallel to the substrate. The plurality of light-emitting units includes four adjacent light-emitting units. The center line connecting the four light-emitting units forms a parallelogram. Any two light-emitting units are arranged adjacent to each other. The center line connecting the two light-emitting units that form the parallelogram and are furthest apart passes through two first points on the adjacent edges of the two light-emitting units. The distance between the two first points is a first distance D1. The angle between the outermost ray emitted by the light-emitting unit and the plane parallel to the substrate is θ. The minimum distance between the adjacent surfaces of the display panel and the substrate is not less than D1*tanθ / 2. The angle between the outermost ray emitted by the light-emitting unit and the normal to the light-emitting surface of the light-emitting unit is α. 1 / 2 , where α 1 / 2The light intensity of the light source at the outermost edge of the light-emitting unit is half the light intensity of the light-emitting unit along the normal direction, and is complementary to θ.

[0007] For example, according to an embodiment of this disclosure, the light diffusion structure includes at least two diffusion layers stacked together.

[0008] For example, according to embodiments of this disclosure, an adhesive is disposed between at least two adjacent diffusion layers; or, the at least two diffusion layers are laminated together to form a monolithic film; or, an optical film is sandwiched between at least two adjacent diffusion layers.

[0009] For example, according to an embodiment of this disclosure, the at least two diffusion layers include a first light diffusion layer and a second light diffusion layer stacked together, wherein one of the first light diffusion layer and the second light diffusion layer is a particle diffusion plate and the other is a diffusion film with a microstructure on its surface.

[0010] For example, according to an embodiment of this disclosure, the distance between two points on the edges of any two adjacent light-emitting units that pass through the center line connecting any two adjacent light-emitting units is not less than the minimum distance between the light-emitting unit located at the outermost edge of the light-emitting plate and the edge of the light-emitting plate.

[0011] For example, according to an embodiment of this disclosure, a plurality of driving circuits are provided on the side of the light-emitting panel where the plurality of light-emitting units are not disposed.

[0012] For example, according to an embodiment of the present disclosure, the light-emitting panel includes a plurality of sub-light-emitting panels, and any one of the plurality of sub-light-emitting panels is provided with at least one of the plurality of driving circuits.

[0013] For example, according to embodiments of this disclosure, the plurality of driving circuits are centrally symmetrically distributed.

[0014] For example, according to an embodiment of the present disclosure, the light-emitting plate includes a plurality of sub-light-emitting plates, a reflective film is disposed between the substrate and the light diffusion structure, the reflective film includes a plurality of sub-reflective films, and there is a gap between two of the plurality of sub-reflective films, and the two sub-reflective films are attached to different parts of the same sub-light-emitting plate.

[0015] For example, according to an embodiment of the present disclosure, a reflective film is disposed between the substrate and the light diffusion structure, the reflective film comprising a plurality of sub-reflective films, and at least two of the plurality of sub-reflective films are partially overlapped.

[0016] For example, according to an embodiment of this disclosure, at least some of the plurality of light-emitting units are arranged in an array along a first direction and a second direction, the first direction intersecting the second direction; the center line connecting two adjacent light-emitting units arranged along the first direction and two light-emitting units that are respectively adjacent to the two adjacent light-emitting units in the second direction forms the parallelogram, and the angle between the side of the parallelogram and the first direction or the second direction is between -20° and 20°.

[0017] For example, according to an embodiment of this disclosure, the thickness of the light diffusion structure in the direction perpendicular to the substrate is less than D1*tanθ / 2, the light diffusion structure is spaced apart from the light-emitting plate, the cross-sectional dimension of the light-emitting unit intercepted by the extension of the line connecting the two first points is L, and the distance between the surface of the light diffusion structure facing the light-emitting plate and the surface of the light-emitting unit facing the substrate is a second distance D2, which satisfies: D1*tanθ / 2 <D2<[(3*D1+2L)*tanθ] / 2。

[0018] For example, according to an embodiment of this disclosure, the light diffusion structure is in direct contact with at least a portion of the light-emitting unit, the thickness of the light-emitting unit in the direction perpendicular to the substrate is H1, and the thickness H2 of the light diffusion structure satisfies: D1*tanθ / 2-H1≤H2≤5mm.

[0019] For example, according to an embodiment of this disclosure, the light-emitting unit includes an unpackaged light-emitting diode chip, the maximum dimension of which is no greater than 500 micrometers in a direction parallel to the substrate.

[0020] For example, according to an embodiment of this disclosure, a protective layer is provided on the side of the plurality of light-emitting units facing the display panel.

[0021] For example, according to an embodiment of the present disclosure, the light-emitting unit includes a light-emitting diode chip and a packaging structure configured to encapsulate the light-emitting diode chip, with a gap provided between the packaging structures of adjacent light-emitting units.

[0022] For example, according to an embodiment of this disclosure, the encapsulation structure is doped with a color conversion material.

[0023] For example, according to an embodiment of the present disclosure, the light-emitting panel includes a first region and a second region located at the edge of the first region, the light-emitting units in the first region are arranged in an array, and in the second region, a line connecting the center of a light-emitting unit and any adjacent light-emitting unit passes through two second points on the edges of the two light-emitting units that are close to each other, the distance between the two second points being less than the first distance.

[0024] For example, according to an embodiment of this disclosure, in the second region, the ratio of the distance between the two second points to the first distance is 0.6 to 0.9.

[0025] For example, according to an embodiment of this disclosure, the light-emitting panel includes a plurality of light-emitting unit rows, each light-emitting unit row including at least two light-emitting units arranged along the first direction, the plurality of light-emitting unit rows being arranged in a direction perpendicular to the first direction, and the first distance between the two light-emitting units in the outermost light-emitting unit row and its adjacent light-emitting unit row being less than the first distance between the two light-emitting units in other two adjacent light-emitting unit rows; and / or, the light-emitting panel includes a plurality of light-emitting unit columns, each light-emitting unit column including at least two light-emitting units arranged along the second direction, the plurality of light-emitting unit columns being arranged in a direction perpendicular to the second direction, and the first distance between the two light-emitting units in the outermost light-emitting unit column and its adjacent light-emitting unit column being less than the first distance between the two light-emitting units in other two adjacent light-emitting unit rows.

[0026] For example, according to an embodiment of this disclosure, a plurality of support portions are provided between the light-emitting plate and the light-diffusing structure. The lines connecting the plurality of support portions form at least a first polygon and a second polygon parallel to the substrate. The second polygon surrounds the first polygon. The first polygon includes a plurality of first diagonals, and the second polygon includes a plurality of second diagonals. At least two of the plurality of first diagonals pass through the geometric center of the light-emitting plate, and / or at least two of the plurality of second diagonals pass through the geometric center of the light-emitting plate.

[0027] For example, according to an embodiment of the present disclosure, the thickness of the support portion in the direction perpendicular to the substrate is less than the second distance.

[0028] For example, according to an embodiment of this disclosure, the value of θ is between 20° and 30°, and the value of D1 / L is between 3 and 10.

[0029] For example, according to an embodiment of this disclosure, the dimension of the cross section of the light-emitting unit intercepted by the extension of the line connecting the two first points is L, the value of θ is between 10° and 25°, and the value of D1 / L is 5 to 11.

[0030] For example, according to an embodiment of this disclosure, the planar shape of the display panel parallel to the substrate is a quadrilateral, the planar shape of the display panel includes two long sides and two short sides, the long sides and the short sides are alternately connected; the angle between the longest first diagonal passing through the geometric center of the light-emitting plate and the straight line parallel to the long side is a first angle, the first angle being the smallest among a plurality of angles between the first diagonal passing through the geometric center of the light-emitting plate and the straight line.

[0031] For example, according to an embodiment of this disclosure, the angle between the shortest first diagonal passing through the geometric center of the light-emitting plate and the straight line is the second angle, which is the largest of a plurality of angles between the first diagonal passing through the geometric center of the light-emitting plate and the straight line.

[0032] For example, according to an embodiment of the present disclosure, the light-emitting plate includes a plurality of sub-light-emitting plates, each sub-light-emitting plate being provided with at least one support portion.

[0033] For example, according to an embodiment of this disclosure, at least two support portions that are equidistant from the geometric center and have the smallest distance are located on different sub-light-emitting plates, and the at least two support portions constitute at least one vertex of the first polygon.

[0034] For example, according to an embodiment of the present disclosure, at least one support portion provided on each sub-light-emitting plate constitutes a vertex of the second polygon.

[0035] For example, according to an embodiment of this disclosure, at least some of the light-emitting units are arranged in an array along a first direction and a second direction, the first direction intersecting the second direction; the plurality of sub-light-emitting plates are arranged in an array along the first direction and the second direction, and at least some of the structures on the plurality of sub-light-emitting plates are centrally symmetrically distributed with respect to the geometric center.

[0036] For example, according to embodiments of this disclosure, the at least part of the structure includes the support portion and the drive circuit.

[0037] For example, according to an embodiment of this disclosure, at least two adjacent light-emitting units constitute a light-emitting unit group, and the support portion is located between adjacent light-emitting unit groups.

[0038] For example, according to an embodiment of the present disclosure, the display device further includes a color conversion layer located between the light diffusion structure and the display panel. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure and are not intended to limit this disclosure.

[0040] Figure 1 This is a schematic diagram of a partial cross-sectional structure of a display device;

[0041] Figure 2 This is a partial cross-sectional structural diagram of a display device provided according to an embodiment of the present disclosure;

[0042] Figure 3A A schematic diagram of equivalent luminescence of a Lambertian luminescent material;

[0043] Figure 3B A schematic diagram of the light emission angle and light intensity distribution of a Lambertian light emitter;

[0044] Figure 4A For including Figure 2 A partial schematic diagram of the display device shown;

[0045] Figure 4B and Figure 4C Including schematic diagrams of the light-emitting units in different examples;

[0046] Figure 5A for Figure 4A A partial planar structural diagram of the light-emitting panel in the display device shown;

[0047] Figure 5B This is a partial planar structural schematic diagram of a light-emitting panel provided according to another example of an embodiment of the present disclosure;

[0048] Figure 5C This is a partial planar structural schematic diagram of a light-emitting panel provided according to another example of an embodiment of the present disclosure;

[0049] Figure 6 This is a partial cross-sectional structural schematic diagram of a display device provided according to an example of an embodiment of the present disclosure;

[0050] Figure 7 This is a partial cross-sectional structural schematic diagram of a display device provided according to an example of an embodiment of the present disclosure;

[0051] Figure 8 This is a partial planar structural schematic diagram of a light-emitting panel provided according to an example of an embodiment of the present disclosure;

[0052] Figure 9 This is a partial planar structural schematic diagram of a light-emitting panel provided according to another example of an embodiment of the present disclosure;

[0053] Figure 10AThis is a plan view of a light-emitting panel provided according to another example of an embodiment of the present disclosure;

[0054] Figure 10B for Figure 10A A schematic diagram of the side of the sub-light-emitting panel without light-emitting units;

[0055] Figure 11 For including Figure 6 and Figure 10A A schematic diagram of the display device with the light-emitting panel shown;

[0056] Figure 12 A partial cross-sectional structural schematic diagram of a display device provided according to an example embodiment of the present disclosure;

[0057] Figure 13A for Figure 12 A schematic diagram of the planar structure of the reflective film in the display device shown;

[0058] Figure 13B This is a schematic diagram of a reflective film in another example of an embodiment of this disclosure;

[0059] Figure 14A This is a structural diagram of a support portion according to some embodiments of the present disclosure;

[0060] Figure 14B This is a structural diagram of another support portion according to some embodiments of the present disclosure;

[0061] Figure 14C This is a structural diagram of yet another support portion according to some embodiments of the present disclosure;

[0062] Figure 14D This is a structural diagram of yet another support portion according to some embodiments of the present disclosure;

[0063] Figure 15A This is a structural diagram of yet another support portion according to some embodiments of the present disclosure;

[0064] Figure 15B This is a structural diagram of yet another support portion according to some embodiments of the present disclosure; and

[0065] Figure 16 for Figure 4A or Figure 6 A schematic diagram of the light-emitting panel in the display device shown, and at least a portion of the structure of the light-emitting panel facing the display panel. Detailed Implementation

[0066] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the described embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0067] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects.

[0068] Figure 1 This is a schematic diagram of a partial cross-sectional structure of a display device. Figure 1 As shown, the display device includes a display panel 10, an optical film 30, a light-emitting plate 20, a back frame 43, an outer frame 42, a plastic frame 45, and a back cover 44. The non-display side of the display panel 10 is mounted on the plastic frame 45 via transparent adhesive or a rubber pad 47, and foam 41 is disposed between the sidewall of the display panel 10 and the outer frame 42. The light-emitting plate 20 and the optical film 30 are disposed on the non-display side of the display panel 10. The optical film 30 is located between the light-emitting plate 20 and the display panel 10, and is configured to modulate the direction of the light emitted from the light-emitting plate 20. The optical film 30 is mounted on the plastic frame 45, and a light guide strip 46 is disposed between the optical film 30 and the plastic frame 45. Transparent adhesive 41 is disposed on both sides of the light guide strip 46. The light-emitting plate 20 includes a substrate 22 and light-emitting units 21 disposed on the side of the substrate 22 facing the optical film 30. The light-emitting plate 20 is configured to provide backlight to the display panel 10. A reflector 23 is provided on the side of the substrate 22 facing the display panel 10, and the reflector 23 has an opening to expose the light-emitting unit 21. The distance between the optical film 30 and the substrate 22 can be 3 mm. The substrate 22 may include driving circuits and wiring structures. The light-emitting plate 20 is disposed on the back frame 43, and the back frame 43 is fixedly connected to the frame 45 and the outer frame 42. A back shell 44 is provided on the side of the back frame 43 away from the light-emitting plate 20. The light-emitting unit 21 can be a bracket-type light-emitting diode, and the maximum size of the light-emitting unit 21 in the direction parallel to the substrate 210 is approximately 10 mm to 20 mm, and the maximum size of the light-emitting unit 21 in the direction perpendicular to the substrate 210 is approximately 3-7 mm.

[0069] For light-emitting panels, it is necessary to ensure that, at least at the preset viewing position, when two adjacent light-emitting units emit the same brightness, these two units should not appear as two independent light sources, i.e., the hotspot phenomenon should be avoided. The inventors discovered through experiments that, for the same light-emitting panel, placing a 3mm thick diffuser plate directly on the light-emitting side of the light-emitting unit virtually eliminates the hotspot phenomenon. However, placing a 2mm thick diffuser plate 1mm away from the surface of the light-emitting unit on the same panel results in a slight hotspot phenomenon. Therefore, it is necessary to comprehensively consider factors such as the display area size, power consumption, weight, thickness, manufacturing cost, and overall process yield of the display device. The hotspot phenomenon can be mitigated by designing or selecting parameters such as the size of the light-emitting units, the distance between adjacent light-emitting units, the spacing between the light-emitting panel and the diffuser plate, and the thickness of the diffuser plate.

[0070] This disclosure provides a display device. The display device includes a display panel and a light-emitting plate. The light-emitting plate is located on the non-display side of the display panel and is stacked with the display panel. The light-emitting plate includes a substrate and a plurality of light-emitting units disposed on the substrate. At least one light-emitting unit has a maximum dimension of no more than 3 mm in a direction parallel to the substrate. The center line connecting four adjacent light-emitting units forms a quadrilateral. Any two light-emitting units are arranged adjacent to each other. The center line connecting the two farthest light-emitting units forming the quadrilateral passes through two first points on the adjacent edges of the two light-emitting units. The distance between the two first points is a first distance D1. The angle between the outermost ray emitted by the light-emitting unit and the plane parallel to the substrate is θ. The minimum distance between the adjacent surfaces of the display panel and the substrate is not less than D1*tanθ / 2. The display device provided by this disclosure can achieve good high dynamic range (HDR) rendering effects while having a relatively thin thickness.

[0071] The display device provided in the embodiments of this disclosure will now be described with reference to the accompanying drawings.

[0072] Figure 2 This is a partial cross-sectional structural diagram of a display device provided according to an embodiment of the present disclosure. Figure 3A This is a schematic diagram of the equivalent luminescence of a Lambertian luminescent material. Figure 3B This is a schematic diagram showing the emission angle and light intensity distribution of a Lambertian light emitter. Figure 4A For including Figure 2 The diagram shows a partial schematic of the display device. Figure 5A for Figure 4A A partial planar structural diagram of the light-emitting panel in the display device shown. Figure 4A The cross-sectional view shown can be along Figure 5A The cross-sectional view of the section cut by line AA' is shown.

[0073] like Figure 2 , Figure 4A and Figure 5A As shown, the display device includes a display panel 100 and a light-emitting plate 200 stacked together. The light-emitting plate 200 is located on the non-display side of the display panel 100. For example, the light-emitting plate 200 can serve as a backlight and is configured to provide backlight to the display panel 100.

[0074] like Figure 2 , Figure 4A and Figure 5A As shown, the light-emitting panel 200 includes a substrate 210 and a plurality of light-emitting units 220 disposed on the substrate 210. At least one light-emitting unit 220 has a maximum dimension of no more than 3 mm in the direction parallel to the substrate 210. For example, the outline of the orthographic projection of the light-emitting unit 220 onto the substrate 210 can be rectangular, and the maximum dimension of the light-emitting unit 220 in the direction parallel to the substrate 210 can be the diagonal of the light-emitting unit 220. For example, the outline of the orthographic projection of the light-emitting unit 220 onto the substrate 210 can be circular, and the maximum dimension of the light-emitting unit 220 in the direction parallel to the substrate 210 can be the diameter of the light-emitting unit 220. For example, the outline of the orthographic projection of the light-emitting unit 220 onto the substrate 210 can be elliptical, and the maximum dimension of the light-emitting unit 220 in the direction parallel to the substrate 210 can be the major axis of the light-emitting unit 220. However, this is not limited to these limitations; the side length of the planar shape of the light-emitting unit is also no more than 3 mm. For example, the light-emitting unit 220 is located on the side of the substrate 210 facing the display panel 100. For example, the maximum size of each light-emitting unit 220 in the direction parallel to the substrate 210 is no greater than 3 mm. For example, the maximum size of the light-emitting unit 220 in the direction parallel to the substrate 210 is no greater than 500 micrometers. For example, the maximum size of the light-emitting unit 220 in the direction parallel to the substrate 210 is no greater than 300 micrometers. The light-emitting units in the light-emitting panel provided in this disclosure embodiment may include sub-millimeter light-emitting diodes (miniLEDs), whose maximum size in the direction parallel to the substrate 210 is no greater than 500 micrometers, for example, no greater than 300 micrometers, or no greater than 250 micrometers, or no greater than 220 micrometers. The maximum size of each light-emitting unit 220 in the direction perpendicular to the substrate 210 is no greater than 2 mm, for example, 1 mm, 0.75 mm, 0.6 mm, 0.15 mm, or 0.1 mm.

[0075] like Figure 2 , Figure 4A and Figure 5AAs shown, the center line connecting four adjacent light-emitting units 220 forms a quadrilateral. Any two light-emitting units 220 are arranged adjacently. The center line connecting the two light-emitting units 220 that form the quadrilateral and are furthest apart passes through two first points 001 on the adjacent edges of the two light-emitting units. The distance between the two first points 001 is a first distance D1. The angle between the outermost ray emitted by the light-emitting unit 220 and the plane parallel to the substrate 210 is θ. The minimum distance between the adjacent surfaces of the display panel 100 and the substrate 210 is not less than D1*tanθ / 2. The display device provided in this embodiment can achieve a good high dynamic range (HDR) effect while having a relatively thin thickness.

[0076] The aforementioned "center line connecting the four light-emitting units 220" can refer to the line connecting the geometric centers of the orthographic projections of the four light-emitting units 220 onto the substrate 210. The aforementioned "first point" is a point on the edge of the orthographic projection of the light-emitting unit 220 onto the substrate 210. The aforementioned "four adjacent light-emitting units 220" can refer to four light-emitting units 220 being adjacent to each other, and no other light-emitting units 220 being disposed between any two light-emitting units 220. The aforementioned "quadrilateral" is a convex quadrilateral.

[0077] For example, such as Figure 4A and Figure 5A As shown, the quadrilaterals mentioned above include parallelograms.

[0078] For example, such as Figure 4A and Figure 5A As shown, at least a portion of the multiple light-emitting units 220 are arranged in an array along a first direction and a second direction, the first direction intersecting the second direction. For example, the first direction can be the X direction and the second direction can be the Y direction, but it is not limited to this, and the first direction and the second direction can be interchanged. For example, the first direction and the second direction can be perpendicular or not perpendicular. For example, the light-emitting panel 200 can include multiple regions, and the light-emitting units 220 in at least one region are arranged in an array along the first direction and the second direction. For example, the first direction can be a row direction and the second direction can be a column direction, or the first direction can be a column direction and the second direction can be a row direction.

[0079] For example, multiple light-emitting units 220 arranged along a first direction can be arranged at equal intervals; multiple light-emitting units 220 arranged along a second direction can also be arranged at equal intervals. For example, light-emitting units 220 arranged along the first direction can be arranged strictly along the first direction, that is, the line connecting the geometric centers of adjacent light-emitting units 220 is parallel to the first direction. For example, light-emitting units 220 arranged along the second direction can be arranged strictly along the second direction, that is, the line connecting the geometric centers of the light-emitting units 220 is parallel to the second direction.

[0080] For example, the quadrilateral is formed by connecting the centers of two adjacent light-emitting units 220 arranged along the first direction and two light-emitting units 220 respectively adjacent to each other in the second direction. The angle between the sides of the quadrilateral and the first or second direction is between -20° and 20°. That is, the angle between any side of the quadrilateral and the first or second direction does not exceed 15°, and can be, for example, 14°, 13°, 10°, 5°, 0°, etc. For example, the sides of the quadrilateral are parallel to the first or second direction.

[0081] Figure 5C This is a partial planar structural schematic diagram of a light-emitting panel provided according to another example of an embodiment of the present disclosure. For example, as shown... Figure 5C As shown, the light-emitting units 220 arranged along the first direction (X direction as shown in the figure) can be arranged approximately along the first direction, that is, the light-emitting units 220 are set approximately along the first direction. The sequential line connecting the geometric centers of these light-emitting units 220 may not be a straight line parallel to the first direction, but rather a zigzag first broken line BL1. The angle between any segment of the first broken line BL1 and the first direction does not exceed 20°, for example, 10°-18°. For example, the angle between any part of the first broken line BL1 and the first direction does not exceed 15°, for example, 12°-14°, for example, 12.5° or 13°, etc. In the plurality of light-emitting units 220 arranged approximately along the first direction, the geometric centers of two adjacent light-emitting units 220 are located on different sides of the reference line RLx, and the shortest straight-line distance between each light-emitting unit in the plurality of light-emitting units 220 arranged approximately along the first direction and the reference line RLx can be approximately the same, wherein the reference line RLx is parallel to the first direction.

[0082] For example, such as Figure 5C As shown, the light-emitting units 220 arranged along the second direction (Y direction as shown in the figure) can be arranged approximately along the second direction, that is, the light-emitting units 220 are set approximately along the second direction. The sequential line connecting the geometric centers of these light-emitting units 220 is not a straight line parallel to the second direction, but a zigzag second broken line BL2. The angle between any segment of the second broken line BL2 and the second direction does not exceed 20°, for example, 10°-18°. For example, the angle between any part of the second broken line BL2 and the second direction does not exceed 15°, for example, 12°-14°, 12.5°, or 13°, etc. In the plurality of light-emitting units 220 arranged approximately along the second direction, the geometric centers of two adjacent light-emitting units 220 are located on different sides of the reference line RLy, and the shortest straight-line distance between each light-emitting unit in the plurality of light-emitting units 220 arranged approximately along the second direction and the reference line RLy can be approximately the same, wherein the reference line RLy is parallel to the second direction.

[0083] For example, as Figure 4A and Figure 5A shown, the center connection lines of two adjacent light-emitting units 220 arranged in the first direction and two light-emitting units 220 respectively adjacent to the two adjacent light-emitting units 220 in the second direction form the above-mentioned quadrilateral, and the sides included in the quadrilateral are parallel to the first direction or the second direction.

[0084] For example, in the quadrilateral, two sides are parallel to the first direction, and the other two sides are parallel to the second direction. For example, the center connection line of two adjacent light-emitting units 220 arranged in the first direction is one side of the quadrilateral. For example, the above-mentioned quadrilateral can be a rectangle or a parallelogram. The center of the above-mentioned light-emitting unit can be the geometric center of the light-emitting unit. The two adjacent light-emitting units 220 arranged in the first direction can refer to two light-emitting units 220 arranged in the first direction without other light-emitting units 220 being provided therebetween. The two adjacent light-emitting units 220 arranged in the second direction can refer to two light-emitting units 220 arranged in the second direction without other light-emitting units 220 being provided therebetween.

[0085] As Figure 4A and Figure 5A shown, the distance between two first points 001 on the edges of the two light-emitting units 220 that are farthest apart and form the quadrilateral and are close to each other is the first distance D1. For example, the distance between two first points 001 on the opposite edges of the two light-emitting units 220 that are farthest apart and form the quadrilateral is the first distance D1. For example, the two light-emitting units 220 that are farthest apart and form the quadrilateral can be two light-emitting units 220 located at the two endpoints of the diagonal of the quadrilateral. For example, the first distance D1 between the two light-emitting units 220 that are farthest apart and form the quadrilateral is less than the length of the diagonal of the quadrilateral. For example, the two light-emitting units 220 that are farthest apart and form the quadrilateral are arranged in the V direction, and the V direction intersects both the X direction and the Y direction. For example, the connection line of the geometric centers of the two light-emitting units 220 that are farthest apart and form the quadrilateral extends in the V direction; and the connection line between the opposite edges of the two light-emitting units 220 that are farthest apart and form the quadrilateral also extends in the V direction, or has an angle within ±5° with the V direction.

[0086] For example, when the above-mentioned quadrilateral is a rectangle, the size of the light-emitting unit 220 in the first direction is w, the size of the light-emitting unit 220 in the second direction is l, the distance between the centers of two adjacent light-emitting units 220 arranged in the first direction can be a, and the distance between the centers of two adjacent light-emitting units 220 arranged in the second direction can be b; where, a and b satisfy a < b. The above w and l satisfy w < l, and the length P of the diagonal of the quadrilateral is (a 2 + b 2 )1 / 2 .

[0087] For example, the dimension of the cross-section of the light-emitting unit 220 by the extension of the line connecting the two first points 001 is L. The aforementioned "cross-section of the light-emitting unit 220 by the extension of the line connecting the two first points 001" can refer to the line connecting the two points where the extension of the line connecting the two first points 001 intersects the orthographic projection of the light-emitting unit 220 on the substrate 210. The aforementioned L = w / cos[arctan(b / a)]. The first distance D1 = PL.

[0088] It is understood that if the outline shape of the light-emitting unit 220 projected onto the substrate 210 is circular, the cross-sectional dimension L of the light-emitting unit 220 intercepted by the extension of the line connecting the two first points 001 is equal to the diameter of the circle.

[0089] For example, such as Figure 4A and Figure 5A As shown, the angle between the outermost ray emitted by the light-emitting unit 220 and the plane parallel to the substrate 210 is θ, and the minimum distance D0 between the close surfaces of the display panel 100 and the substrate 210 is not less than (D1*tanθ) / 2. Figure 4A The illustration shows that the outermost light rays emitted by the light-emitting unit 220 are emitted from the contact position between the light-emitting unit 220 and the substrate 210. In the actual product, the outermost light rays emitted by the light-emitting unit 220 can be emitted from a position in the light-emitting unit 220 with a small distance between it and the substrate 210.

[0090] like Figure 3A and Figure 3B As shown, if the luminous intensity of an extended light source is dI∝cosmα, meaning its brightness is independent of direction, this type of emitter is called a cosine emitter or a Lambert emitter. The law governing luminous flux emission according to cosα is called the Lambert cosine law. In the formula, dI is the luminous intensity of each surface element dS of the extended light surface along a certain direction r, and α is the angle between the light source's emission direction r and the normal n. The light intensity distribution satisfies: I α =I O cosmα,I O The luminous intensity distribution is perpendicular to the normal direction of the light source surface, m=(-In2) / (Incosα) 1 / 2 ), that is, m is determined by α 1 / 2 Decision, where α 1 / 2 α is defined as the angle between the luminous direction and the normal n when the luminous intensity drops to half of the luminous intensity corresponding to the normal direction. 1 / 2 The value of α ranges from 40° to 80°; that is, if the intensity of the light ray emitted along the normal n direction is defined as 1, the angle between the ray and the normal n is α.1 / 2 The intensity of the emitted ray is 1 / 2, and the angle between the emitted direction and the normal n is greater than α. 1 / 2 The light rays emitted by a Lambert luminescent body have relatively low intensity. That is, although a Lambert luminescent body can theoretically emit countless light rays, the light rays with different angles to the normal n have different intensities.

[0091] Figure 4B and Figure 4C These are schematic diagrams of the light-emitting units in different examples. For example, such as... Figure 4B As shown, the light-emitting unit 220 includes an unpackaged light-emitting diode chip 225, and the maximum size of the unpackaged light-emitting diode chip 225 in the direction parallel to the substrate 210 is no more than 500 micrometers.

[0092] For example, the light-emitting unit 220 is an unpackaged light-emitting diode chip 225, wherein the light-emitting diode chip 225 is a sub-millimeter inorganic light-emitting diode (miniLED), the thickness of the unpackaged light-emitting diode chip 225 can be 70 micrometers to 180 micrometers, and the maximum dimension of the unpackaged light-emitting diode chip 225 in the direction parallel to the substrate 210 is no more than 500 micrometers.

[0093] For example, an unpackaged LED chip 225 can be equivalent to a Lambertian light emitter, because the angle between the unpackaged LED chip 225 and the normal n is greater than α. 1 / 2 The light rays, whose intensity is relatively low, are not within the scope of this disclosure. Therefore, in this embodiment, the angle between the unpackaged LED chip 225 and the normal n is α. 1 / 2 The emitted light is defined as the outermost edge light of the unencapsulated light-emitting diode chip 225, that is, the outermost edge light of the light-emitting unit 220.

[0094] For example, such as Figure 4A and Figure 4B As shown, a protective layer 223 is provided on the side of the multiple light-emitting units 220 facing the display panel 100. For example, to prevent the light-emitting diode chips 225 from being scratched or bumped during subsequent processes, such as placing optical films on the light-emitting plate 200 or during transportation, the protective layer 223 can be used to uniformly protect the multiple light-emitting diode chips 225 on the light-emitting plate 200. For example, the multiple light-emitting diode chips 225 can share the same protective layer 223. For example, the protective layer 223 can be made of a transparent material, such as transparent silicone. For example, the surface of the protective layer 223 away from the substrate 210 can be an almost flat surface, thereby improving the yield of the display device.

[0095] For example, to reduce total internal reflection of light emitted from the LED chip 225 within the protective layer 223, the refractive index of the protective layer 223 can be between the refractive index of the LED chip 225 and the refractive index of the material adjacent to the protective layer 223 (e.g., air). For example, the refractive index of the protective layer 223 can be between 1.2 and 1.6. For example, the refractive index of the protective layer 223 can be between 1.3 and 1.4. For example, the refractive index of the protective layer 223 is less than 1.4. For example, the refractive index of the protective layer 223 can be less than 1.5. For example, the refractive index of the protective layer 223 can be greater than 1.1. For example, the refractive index of the protective layer 223 can be greater than 1.2. For example, the refractive index of the protective layer 223 can be greater than 1.3. For example, the refractive index of the protective layer 223 can be approximately 1.35. For example, the protective layer 223 can cover all unencapsulated LED chips 225 on the light-emitting panel 200, and the protective layer 223 can have a flat or slightly uneven upper surface. For example, the thickness of the protective layer 223 is slightly greater than the thickness of the unencapsulated light-emitting diode chip 225.

[0096] For example, such as Figure 4C As shown, the light-emitting unit 220 includes a light-emitting diode chip 225 and a packaging structure 224 configured to encapsulate the light-emitting diode chip 225, with a gap between the packaging structures 224 of adjacent light-emitting units 220.

[0097] For example, such as Figure 4C As shown, the light-emitting unit 220 includes a packaged light-emitting diode chip, wherein the light-emitting diode chip 225 is a sub-millimeter light-emitting diode chip (miniLED). The unpackaged light-emitting diode chip 225 has a size of 70 micrometers to 180 micrometers in the direction perpendicular to the substrate 210, and the maximum size of the unpackaged light-emitting diode chip 225 in the direction parallel to the substrate 210 is no greater than 500 micrometers. It can be understood that the packaged light-emitting diode chip is the light-emitting unit 220. The maximum size and thickness of the packaged light-emitting diode chip in the direction parallel to the substrate 210 are larger than the corresponding parameters of the unpackaged light-emitting diode chip 225. For example, the maximum size of the light-emitting unit 220 in the direction parallel to the substrate 210 is no greater than 3 mm, 1.5 mm, 1 mm, 0.5 mm, etc. The maximum size of each light-emitting unit 220 in the direction perpendicular to the substrate 210 is no greater than 2 mm, for example, 1 mm, 0.75 mm, 0.6 mm, 0.15 mm, or 0.1 mm.

[0098] For example, such as Figure 4CAs shown, a single LED chip 225 can be packaged into an independent device to form a light-emitting unit 220, and then placed at the corresponding position on the light-emitting plate 200 and fixedly connected to the light-emitting plate 200. Since an unpackaged LED chip can be considered a Lambertian light emitter, when the LED chip is packaged, the light emission angle range is within +α. 1 / 2 to -α 1 / 2 The light rays inside can be emitted, while +α 1 / 2 to -α 1 / 2 In this case, the light rays emitted by the light-emitting unit are essentially confined within the independent device due to total internal reflection. Therefore, the angle θ between the outermost ray emitted by the light-emitting unit and the substrate is α. 1 / 2 The complementary angle.

[0099] For example, such as Figure 4B As shown, the LED chip 225 can also be placed on the corresponding position on the light-emitting plate 200 before encapsulation. In some examples, each LED chip can be encapsulated using a transparent material, such as transparent silicone, through screen printing or dot printing to form an encapsulation structure 224. Depending on the shape of the encapsulation structure 224, the light emission angle of the LED chip can be modulated, thereby changing the light emission angle of the light-emitting unit. For example, if the surface of the encapsulation structure away from the substrate is curved, the light emission angle of the outermost ray emitted by the light-emitting unit is slightly greater than the α angle of the LED chip. 1 / 2 If α 1 / 2 If the value range is 40° to 65°, then the range of the emission angle of the outermost ray emitted by the light-emitting unit can be 50° to 70°.

[0100] For example, the package structure 224 can have any desired size in the direction perpendicular to the substrate 210, such as less than 0.5 mm, between 0.1 and 0.4 mm, between 0.2 and 0.4 mm, less than 0.3 mm, between 0.25 and 0.35 mm, between 0.15 and 0.25 mm, approximately 0.2 mm, approximately 0.3 mm, etc. The maximum size of the package structure 224 in the direction parallel to the substrate 210 can be, for example, between 0.3 and 2.5 mm, between 0.3 and 0.7 mm, between 0.8 and 0.9 mm, greater than 0.5 mm, greater than 1.0 mm, greater than 2.0 mm, less than 2.0 mm, etc. The ratio of the maximum size of the package structure 224 in the direction parallel to the substrate 210 to its size in the direction perpendicular to the substrate 210 can be greater than 3, between 4 and 6, or less than 10, etc.

[0101] For example, after being packaged as an independent device, the geometric center of the LED chip projected onto the substrate can coincide with the geometric center of the independent device projected onto the substrate. However, it is not limited to this. The geometric center of the LED chip projected onto the substrate can also be offset relative to the geometric center of the independent device projected onto the substrate. The thickness H1 of the light-emitting unit 220 in the direction perpendicular to the substrate 210 is the thickness of the packaged LED chip.

[0102] For example, such as Figure 4B and Figure 4C As shown, the light-emitting unit 220 or the light-emitting diode chip 225 is connected to the pads 222 on the substrate 210 via solder metal 221. For example, the solder metal 221 may include solder.

[0103] For example, such as Figure 4C As shown, the encapsulation structure 224 is doped with color conversion material 226. For example, color conversion material 226 may include phosphor material or quantum dot material. For example, color conversion material 226 may include materials that convert blue light into white light. For example, color conversion material 226 may include materials that convert blue light into red and green light.

[0104] For example, display panel 100 may be a liquid crystal display panel. The liquid crystal display panel may include an array substrate (not shown), an opposing substrate (not shown), and a liquid crystal layer (not shown) located between the array substrate and the opposing substrate.

[0105] For example, the side of the array substrate facing the opposing substrate may include multiple gate lines extending in one direction and multiple data lines extending in another direction. The multiple gate lines and multiple data lines are intersected to define multiple pixel units arranged in an array, and the multiple pixel units can be arranged into a pixel array. Each pixel unit may include a pixel electrode and a thin-film transistor. The gate lines are connected to the gate of the thin-film transistor to control the opening or closing of the thin-film transistor. The pixel electrode is connected to one of the source and drain terminals of the thin-film transistor, and the data line is connected to the other of the source and drain terminals of the thin-film transistor. The data line inputs the voltage signal required for displaying the image to the pixel electrode through the thin-film transistor to realize the display of the array substrate.

[0106] For example, the opposing substrate can be a color filter substrate. On the side of the color filter substrate facing the array substrate, a color filter layer corresponding to the pixel unit and a black matrix covering structures located in non-display areas, such as gate lines and data lines, can be disposed. For example, a common electrode opposite to the pixel electrode can also be disposed on the side of the color filter substrate facing the array substrate. The common electrode is configured to apply a common voltage to generate an electric field with the pixel electrode that drives the liquid crystal molecules in the liquid crystal layer to deflect. The liquid crystal molecules change the transmittance of the liquid crystal layer by deflection, thereby achieving the display of the desired grayscale image.

[0107] For example, the display panel 100 may further include a first polarizer disposed on the side of the array substrate away from the opposing substrate and a second polarizer disposed on the side of the opposing substrate away from the array substrate. The first polarizer includes a transmission axis extending along the DI1 direction and polarizes the backlight incident therein along the DI1 direction. The second polarizer includes a transmission axis extending along the DI2 direction and polarizes the light incident on the second polarizer along the DI2 direction. For example, the transmission axes of the first polarizer and the second polarizer are perpendicular to each other.

[0108] It is understandable that, such as Figure 4A and Figure 5A As shown, the four light-emitting units 220 constituting the quadrilateral can be electrically connected, for example, they can be connected in series or in parallel, or in series in pairs and then in parallel. However, this is not a limitation; some of the light-emitting units 220 constituting the quadrilateral may not be electrically connected, and this embodiment does not impose any restrictions on this.

[0109] For example, the display device may also include a color conversion layer located between the light diffusion structure 300 and the display panel 100. For example, the display device may include one of a color conversion layer and a color conversion material. For example, a light-emitting unit 220 having a single emitted color may be paired with a color conversion layer 034. Figure 16 As shown, this allows for white light emission, which, combined with a passive display panel, enables full-color image display. For example, when the light-emitting unit 220 emits blue light, the color conversion layer may include a phosphor layer (e.g., a yellow phosphor material or other photoluminescent material layer), which can convert the incident blue light into other colors. The light-emitting unit 220 can emit light of any suitable color; for example, it can emit a single color of light, such as blue, red, or green.

[0110] For example, the substrate 210 can be a printed circuit board (PCB) or a material such as glass, plastic, polyimide, or polymethyl methacrylate with circuitry. For example, the control circuit controls the light-emitting unit 220 through the circuitry on the light-emitting panel 200, thereby achieving a local dimming scheme that helps improve the dynamic range of the image displayed on the pixel array.

[0111] For example, each light-emitting unit 220 may include a p-electrode, a p-type semiconductor layer, an n-electrode, an n-type semiconductor layer, and a light-emitting layer. Holes and electrons are injected from the n-electrode and the p-electrode into the n-type semiconductor layer and the p-type semiconductor layer, respectively, and recombine in the light-emitting layer, thus releasing energy in the form of photons. The emission wavelength depends on the band gap of the light-emitting material.

[0112] Figure 5B This is a partial planar structural schematic diagram of a light-emitting panel provided according to another example of an embodiment of the present disclosure. Figure 5B The light-emitting plate shown is Figure 5A The difference between the light-emitting panels shown lies in the arrangement of the light-emitting units 220. Figure 5A In the light-emitting unit 220 shown, the first direction and the second direction are perpendicular. Figure 5B In the light-emitting unit 220 shown, the included angle between the first direction and the second direction is an obtuse angle.

[0113] For example, Figure 5A and Figure 5B schematically show that multiple light-emitting units 220 are arranged at equal intervals in any direction, but not limited to this, and the light-emitting units 220 in at least some regions can also be arranged at unequal intervals in a certain direction.

[0114] For example, as Figure 5B shown, when the above quadrilateral is not a rectangle, the size of the light-emitting unit 220 in the first direction is w, the size of the light-emitting unit 220 in the second direction is l, the distance between the centers of two adjacent light-emitting units 220 arranged in the first direction can be a, and the distance between the centers of two adjacent light-emitting units 220 arranged in the third direction perpendicular to the first direction in the third direction can be b; where, a and b satisfy a < b. The above w and l satisfy w < l, and the length P of the diagonal of the quadrilateral is (a 2 + b 2 + 2 * a * b * cosβ) 1 / 2 .

[0115] For example, the size of the intercept line of the light-emitting unit 220 intercepted by the extension line of the connection line of two first points 001 is L. The above "intercept line of the light-emitting unit 220 intercepted by the extension line of the connection line of two first points 001" can refer to the connection line of two points where the extension line of the connection line of two first points 001 intersects the positive projection of the light-emitting unit 220 on the substrate 210. The above L = w / cosβ. The first distance D1 = P - L.

[0116] It can be understood that if the contour shape of the positive projection of the above light-emitting unit 220 on the substrate 210 is circular, the size L of the intercept line of the light-emitting unit 220 intercepted by the extension line of the connection line of two first points 001 is equal to the diameter of the circle.

[0117] For example, as Figure 4A and Figure 5A shown, among the light rays emitted by two adjacent light-emitting units 220 arranged in the V direction, the outermost light rays converge to form the mixing point M of the two adjacent light-emitting units 220.

[0118] For example, the minimum distance D0 between the close surfaces of the display panel 100 and the substrate 210 is not less than the distance between the mixing point M of two adjacent light-emitting units 220 and the side of the substrate 220 facing the display panel 100, i.e., (D1*tanθ) / 2, where θ=90°-α 1 / 2 .

[0119] By setting the distance between the display panel and the substrate to be greater than the distance between the light mixing point M and the substrate, the light emitted by adjacent light-emitting units can be mixed before it enters the display panel, thus preventing the problem of light shadows. For example, Figure 4A and Figure 5A As shown, the position of the light mixing point M is related to the size of the light-emitting unit 220, the first distance D1 between adjacent light-emitting units, and the angle θ between the outermost ray emitted by the light-emitting unit 220 and the substrate. For example, in addition to the light emitted by two adjacent light-emitting units 220 intersecting to form a light mixing point, the light emitted by two non-adjacent light-emitting units 220 arranged along the V direction (for example, one or more light-emitting units 220 are disposed between these two light-emitting units 220) may also intersect to form a light mixing point.

[0120] For example, such as Figure 2 As shown, the display device also includes an optical film 30, a back frame 43, a plastic frame 45, a support frame 48, and a rear shell 44. The plastic frame 45 is configured to support the display panel 100. The light-emitting plate 200 and the optical film 30 are disposed on the non-display side of the display panel 100. The support portion of the plastic frame 45 is configured to support the display panel 100 and is located between the optical film 30 and the display panel 100. The optical film 30 is located between the light-emitting plate 200 and the display panel 100 and is configured to at least modulate the direction of the light emitted from the light-emitting plate 20. The optical film 30 may include multiple film layers, such as a light diffusion structure, a color conversion layer, a prism layer, etc. For example, the thickness of the light diffusion structure may be 1.5 mm. A support frame 48 is disposed between the optical film 30 and the light-emitting plate 20 and is configured to support the optical film 30. For example, Figure 2 The diagram schematically shows a gap, which can be 7 mm, between the light diffusion structure and the light-emitting panel 20. The light-emitting panel 20 includes a substrate 22 and light-emitting units 21 disposed on the side of the substrate 22 facing the optical film 30. The light-emitting panel 20 is configured to provide backlight to the display panel 10. The substrate 22 may include structures such as driving circuitry and reflective films. The thickness of the substrate 22 can be 1.27 mm. The light-emitting panel 20 and the support frame 48 are disposed on the back frame 43.

[0121] Figure 6 This is a partial cross-sectional structural schematic diagram of a display device provided according to an example embodiment of the present disclosure. For example, such as... Figure 6As shown, the display device also includes a light diffusion structure 300 located between the light-emitting plate 200 and the display panel 100.

[0122] For example, the light diffusion structure 300 may include only one diffusion layer, or it may include two or more diffusion layers, which can be bonded together with an adhesive (such as a pressure-sensitive adhesive). For example, the adhesive may have diffusion properties to improve the diffusion effect of the light diffusion structure. For example, two or more diffusion films (layers) can be pressed together to form a monolithic film. However, the embodiments disclosed herein are not limited to this; the multilayer films included in the light diffusion structure may not be bonded together. For example, other optical films (such as prisms) may be sandwiched between the two side films of the light diffusion structure.

[0123] For example, such as Figure 6 As shown, the display device can be a large-size display device. For example, in a large-size display device, the value of θ is between 20° and 30°, and the first distance D1 and L satisfy D1 / L of 3 to 10. For example, the diagonal length of the display surface of a large-size display device can be greater than 30 inches, specifically, such as 32 inches, 34 inches, etc.; large-size display devices include monitors, desktop computers, televisions, and other products. The distance between adjacent light-emitting units 220 can refer to the distance between the edges of adjacent light-emitting units 220 that are close to each other. The "size of a light-emitting unit 220" can refer to the maximum size of the light-emitting unit 220 in the direction parallel to the substrate. For example, θ can be 20°, 25°, or 30°. For example, the value of D1 / L can be 5 to 8. For example, the value of D1 / L can be 4 to 7.

[0124] For example, the length and width of the display surface of this large-size display device are DL and DW, respectively, and the optimal viewing distance for the user is between 3DW and 5DW. It is understandable that the larger the size of the display device, the greater its optimal viewing distance, while the requirement for its overall thickness is relatively lower. Furthermore, considering the cost of the display device, the number of light-emitting units 220 included in the light-emitting panel does not increase proportionally with the size of the display device. Therefore, the arrangement density of the light-emitting units 220 on the light-emitting panel in a large-size display device is relatively small, meaning the distance between adjacent light-emitting units 220, such as the first distance D1, can be relatively large.

[0125] For example, such as Figure 6 As shown, the light mixing point of the light emitted by two adjacent light-emitting units 220 is the first light mixing point M1. The distance between the first light mixing point M1 and the substrate 210 is (D1*tanθ) / 2. The above distance can be called the first-order light mixing distance. The position of the first light mixing point M1 generates first-order light mixing.

[0126] For example, such as Figure 6 As shown, the dimension of the cross-section of the light-emitting unit 220 intercepted by the extension of the line connecting the two first points is L. Along the V direction, the mixing point of the light emitted by the Nth light-emitting unit 220 and the (N+2)th light-emitting unit 220 is the second mixing point M2. The distance between the second mixing point M2 and the substrate 210 is [(2*D1+L)*tanθ] / 2. This distance can be called the second-order mixing distance, and the position of the second mixing point M2 generates second-order mixing. Along the V direction, the mixing point of the light emitted by the Nth light-emitting unit 220 and the (N+3)th light-emitting unit 220 is the third mixing point M3. The distance between the third mixing point M3 and the substrate 210 is [(3*D1+2L)*tanθ] / 2. This distance can be called the third-order mixing distance, and the position of the third mixing point M3 generates third-order mixing. N is a positive integer greater than zero. It is understandable that the light intensity of light propagating in any direction is inversely proportional to the square of the distance. The distance from the third-level mixing point M3 to the substrate 210 is larger than that from the second-level mixing point M2, while the distance from the second-level mixing point M2 to the substrate 210 is larger than that from the first-level mixing point M1. Therefore, the mixing effect at the first-level mixing point M1 is better.

[0127] For example, such as Figure 6 As shown, the thickness of the light diffusion structure 300 in the direction perpendicular to the substrate 210 (Z direction as shown in the figure) is less than (D1*tanθ) / 2. The light diffusion structure 300 and the light-emitting plate 200 are spaced apart. The distance between the surface of the light diffusion structure 300 facing the light-emitting plate 200 and the surface of the light-emitting unit 220 facing the substrate 210 is the second distance D2, which satisfies: (D1*tanθ) / 2 <D2<[(3*D1+2L)*tanθ] / 2。

[0128] For example, when the thickness of the light diffusion structure 300 is less than (D1*tanθ) / 2, the thickness of the light diffusion structure 300 is less than the aforementioned first-level light mixing distance. If there is no certain interval between the light diffusion structure 300 and the light-emitting plate 200, the aforementioned first-level light mixing will not occur in the light diffusion structure 300, which can easily lead to lamp shadows. For example, the thickness H2 of the light diffusion structure 300 can be 3 mm, while (D1*tanθ) / 2 is greater than 3 mm. By setting the value of the second distance between the light diffusion structure 300 and the light-emitting plate 200, the light emitted by the adjacent light-emitting unit 220 can undergo first-level light mixing before incident on the light diffusion structure 300, but without third-level light mixing. This achieves a better uniform light effect while avoiding a large thickness in the display device.

[0129] Figure 7 This is a partial cross-sectional structural schematic diagram of a display device provided according to an example embodiment of the present disclosure. For example, such as... Figure 7 As shown, the display device also includes a light diffusion structure 300 located between the light-emitting plate 200 and the display panel 100. Figure 7 The light diffusion structure 300 in the display device shown can be combined with... Figure 6 The light diffusion structure 300 shown has the same characteristics, which will not be described again here.

[0130] For example, such as Figure 7 As shown, the display device can be a small-sized display device. For example, in a small-sized display device, the value of θ is between 10° and 25°, and the first distance D1 and L satisfy D1 / L of 5 to 11. For example, the diagonal length of the display surface of a small-sized display device can be between 7 and 27 inches, specifically, it can be 7.9 inches, 8 inches, 9 inches, 9.7 inches, 10.9 inches, 12.9 inches, 27 inches, etc. Small-sized display devices include handheld computers, tablet computers, laptops, and other products. The distance between adjacent light-emitting units 220 can refer to the distance between the edges of adjacent light-emitting units 220 that are close to each other. The "size of a light-emitting unit 220" can refer to the maximum size of the light-emitting unit 220 in the direction parallel to the substrate. For example, θ can be 10°, 15°, 20°, or 25°. For example, the value of D1 / L can be 6 to 10. For example, the value of D1 / L can be 7 to 8.

[0131] For example, such as Figure 7 As shown, the thickness of the light diffusion structure 300 in the direction perpendicular to the substrate 210 is greater than (D1*tanθ) / 2, and the light diffusion structure 300 is in direct contact with at least a portion of the light-emitting unit 220. This direct contact can mean that there is no gap between them. Alternatively, it can mean that the light diffusion structure 300 is in direct contact with the surface of the encapsulation structure of the light-emitting unit 220.

[0132] For example, when the thickness of the light diffusion structure 300 is greater than (D1*tanθ) / 2, the thickness of the light diffusion structure 300 is greater than the aforementioned first-stage light mixing distance. First-stage light mixing can be achieved in the light diffusion structure 300, and the light diffusion structure 300 and the light-emitting unit 220 can be directly contacted and disposed, which will also have a better light uniformity effect and a lower probability of lamp shadow problems. For example, the thickness of the light-emitting unit 220 in the direction perpendicular to the substrate 210 is H1, and the thickness H2 of the light diffusion structure 300 satisfies: [(D1*tanθ) / 2-H1]≤H2≤5mm. For example, the thickness H2 satisfies H2≤4mm, or H2 can be no greater than 3mm.

[0133] In this disclosure, the position and thickness of the light diffusion structure are set according to the distance between adjacent light-emitting units and the diffusion angle of the light-emitting units in the light-emitting panel of display devices of different sizes. This allows for the achievement of better high dynamic range (HDR) rendering effects while making the display device thinner.

[0134] Figure 8 This is a partial planar structural schematic diagram of a light-emitting panel provided according to an example embodiment of the present disclosure. For example, as shown... Figure 8 As shown, the light-emitting panel 200 includes a first region 201 and a second region 202 located at the edge of the first region 201. For example, the second region 202 can be a corner area of ​​the light-emitting panel 200. For example, the shape of the display area of ​​the display panel can be a rounded rectangle, and the areas in the light-emitting area of ​​the light-emitting panel 200 corresponding to the corners of the display area are also adapted to be rounded corners, and the second region 202 can be the area where the four rounded corners are located. For example, the arrangement pattern of the light-emitting units located in the edge area of ​​the light-emitting panel can be determined according to the shape of the edge area of ​​the display area of ​​the display panel. For example, the shape of the light-emitting panel can be similar to or even identical to the shape of the display panel, or it can be a different shape.

[0135] For example, such as Figure 8 As shown, the light-emitting units 220 located in the first region 201 are arranged in an array along the first direction and the second direction. The distance between the two adjacent light-emitting units 220 that are furthest apart in each quadrilateral 203 formed by the light-emitting units 220 in the first region 201 can be equal. However, the embodiments of this disclosure are not limited to this, and the distance between the two furthest light-emitting units in different quadrilaterals in the first region can also be unequal.

[0136] For example, at least some of the light-emitting units 220 in the second region 202 have a different arrangement pattern than the light-emitting units 220 in the first region 201. For example, in the second region 202, there are cases where two adjacent light-emitting units 220 are not arranged along the first direction (such as the X direction), the second direction (such as the Y direction), or the diagonal of a quadrilateral (such as the V direction).

[0137] For example, such as Figure 8 As shown, in the second region 202, the center line connecting a light-emitting unit 220 and any adjacent light-emitting unit 220 passes through two second points 002 on the edges of the two light-emitting units 220 that are close to each other, and the distance between the two second points 002 is less than the first distance D1.

[0138] For example, in the second zone 202, the ratio of the distance between two second points 002 to the first distance D1 is 0.6 to 0.9. For example, in the second zone 202, the ratio of the distance between two second points 002 to the first distance D1 is 0.7 to 0.8.

[0139] For example, such as Figure 8 As shown, in the second region 202, the distance between the opposing edges of a light-emitting unit 220 and any adjacent light-emitting unit 220 is less than the first distance D1. For example, in the second region 202, the distance between the close edges of a light-emitting unit 220 and any adjacent light-emitting unit 220 is less than the first distance D1. For example, in the second region 202, in a quadrilateral 204 formed by four light-emitting units 220 including three light-emitting units 220 adjacent to the edge of the light-emitting plate, the distance D3 between the opposing edges of the two adjacent light-emitting units 220 that are furthest apart is less than the first distance D1.

[0140] For example, such as Figure 8 As shown, the arrangement of light-emitting units 220 in the corner area (such as the second area 202) of the light-emitting panel 200 can differ from the arrangement of light-emitting units 220 in the non-edge area (such as the first area 201). For example, the arrangement of the four adjacent light-emitting units 220 in the corner area is slightly different from that in the non-edge area; that is, the position of the light-emitting unit 220-1 located at the corner is moved closer to the other three light-emitting units 220. The aforementioned four adjacent light-emitting units 220 can refer to four light-emitting units arranged in a 2*2 array.

[0141] For example, Figure 8 The arrangement of the light-emitting units in the light-emitting panel shown is suitable for Figure 6 and Figure 7 The display device shown in the example.

[0142] Figure 9 This is a partial planar structural schematic diagram of a light-emitting panel provided according to another example of an embodiment of the present disclosure. For example, as shown... Figure 9 As shown, the light-emitting panel 200 includes multiple rows of light-emitting units 2201, each row of light-emitting units 2201 including at least two light-emitting units 220 arranged along a first direction, and the multiple rows of light-emitting units 2201 are arranged along a direction perpendicular to the first direction. For example, the direction perpendicular to the first direction can be a second direction or other directions.

[0143] For example, such as Figure 9 As shown, the quadrilateral 205 is formed by the outermost row of light-emitting units 2201 and the four light-emitting units 220 in the adjacent row of light-emitting units 2201. The first distance D1 between the two adjacent light-emitting units 220 in the quadrilateral 205 that are farthest apart is smaller than the first distance D1 between the two adjacent light-emitting units 220 in the other two adjacent rows of light-emitting units 2201 that are farthest apart.

[0144] For example, such as Figure 9 As shown, taking the direction pointed to by the Y direction as upward, the arrangement of the four adjacent light-emitting units 220 in the last (or first) row (or second) and the second-to-last (or second) row (or second) of the light-emitting unit row 2201 differs slightly from the arrangement of the four adjacent light-emitting units 220 in the two adjacent rows (or rows of light-emitting units 2201) of the middle region (i.e., the region excluding the aforementioned four rows of light-emitting unit rows 2201). For example, the row spacing between the last (or first) and the second-to-last (or second) row (or second) of the light-emitting unit row 2201 is smaller than the row spacing between any two adjacent rows (or rows of light-emitting units 2201) of the middle region. Here, the row spacing can refer to the distance between the edges of two adjacent rows of light-emitting units that are closest to each other. The aforementioned four adjacent light-emitting units 220 can refer to four light-emitting units arranged in a 2*2 array.

[0145] The embodiments disclosed herein are not limited to this. For example, the light-emitting panel includes multiple light-emitting unit columns, each light-emitting unit column including at least two light-emitting units arranged along a second direction. The multiple light-emitting unit columns are arranged in a direction perpendicular to the second direction. The first distance between the two light-emitting units in the outermost light-emitting unit column and its adjacent light-emitting unit column is smaller than the first distance between the two light-emitting units in other adjacent light-emitting unit rows. For example, the direction perpendicular to the second direction can be the first direction or other directions.

[0146] For example, the arrangement of the four adjacent light-emitting units in the last (or first) column and the second-to-last (or second) column differs slightly from the arrangement of the four adjacent light-emitting units in the two adjacent columns of the middle region (i.e., the region excluding the aforementioned four columns). For instance, the row spacing between the last (or first) and the second-to-last column is smaller than the column spacing between any two adjacent columns of light-emitting units in the middle region. Here, column spacing can refer to the distance between the closest edges of two adjacent columns of light-emitting units. The aforementioned four adjacent light-emitting units can refer to four light-emitting units arranged in a 2x2 array.

[0147] For example, Figure 9 The arrangement of the light-emitting units in the light-emitting panel shown is suitable for Figure 6 and Figure 7 The display device shown in the example.

[0148] The display panel comprises multiple pixel units, and the spacing between adjacent pixel units can be set according to the human eye's resolution limit. The human eye's resolution limit is related to the viewing distance. For example, if only two adjacent pixel units on the display panel appear white, when the human eye is positioned 1 meter away from the display panel, the distance between the two pixel units must be at least 0.291 mm (2 * 1000 mm * tan(1' / 2 / 60)° = 0.291 mm) for them to be clearly distinguishable; when the human eye is positioned 2 meters away from the display panel, the distance between the two pixel units must be at least 0.582 mm for them to be clearly distinguishable. When the spacing between the two pixels is less than the corresponding distance, the two pixel units will be perceived as a point or a line segment and cannot be distinguished.

[0149] Therefore, for display devices, the minimum spacing between two adjacent pixel units should be such that it can be distinguished by the human eye at least at the optimal viewing distance. The spacing between two adjacent pixel units should not be less than (D*1.22*λ) / d, where D is the viewing distance of the display surface of the display device, λ is the wavelength of light to which the human eye is most sensitive, d is the diameter of the human pupil, the length of the display surface of the display panel is L0, the width is W, and D is a value between 3W and 5W.

[0150] For a display device using the light-emitting plate provided in the above embodiments of this disclosure as a backlight, ideally, each light-emitting unit on the light-emitting plate can correspond to one pixel unit and provide backlight. However, in actual products, considering cost and process yield, multiple light-emitting units on the light-emitting plate are usually grouped first. For example, every 2*2 light-emitting units are connected in series as a light-emitting unit group, and multiple light-emitting units in the same light-emitting unit group are connected in series. They can also be connected in parallel or in a series-parallel combination. Each light-emitting unit group corresponds to several, dozens, or even hundreds or thousands of pixel units to provide backlight. Correspondingly, the distance Δy between the centers of adjacent light-emitting unit groups is not less than (D*1.22*λ) / d, and correspondingly, either the length or the width of the area occupied by each light-emitting unit group is not less than (D*1.22*λ) / d.

[0151] For example, the number K of light-emitting unit groups arranged along the extension direction of the long side (the side with length L0) of the display surface of the display panel (such as one of the first direction and the second direction) is less than L0 / Δy, and the number J of light-emitting unit groups arranged along the extension direction of the short side (the side with length W) of the display surface of the display panel (such as the other of the first direction and the second direction) is less than W / Δy.

[0152] For example, the resolution of the pixel units in the display panel is P*Q, and the light-emitting panel includes K*J groups of light-emitting units, where P is divisible by K and Q is divisible by J.

[0153] For example, such as Figures 4A to 9 As shown, the distance between two points on the edges of any two adjacent light-emitting units 220 that are close to each other, through the center line connecting any two adjacent light-emitting units 220, is not less than the minimum distance between the light-emitting unit 220 located at the outermost edge of the light-emitting plate 200 and the edge of the light-emitting plate 200.

[0154] For example, the distance between the edges of any two adjacent light-emitting units 220 that are opposite each other is not less than the distance between the edges of the light-emitting unit 220 located at the outermost edge of the light-emitting plate 200 (e.g., Figure 8 The minimum distance between the light-emitting unit 220-1 and the edge of the light-emitting plate 200 is such that the brightness of the periphery of the display area of ​​the display panel is lower than that of the central area.

[0155] Figure 10A This is a plan view of a light-emitting panel provided according to another example of an embodiment of this disclosure. For example, as... Figure 6 and Figure 10A As shown, when there is a gap between the light diffusion structure 300 and the light-emitting plate 200, a plurality of support portions 400 are provided between the light-emitting plate 200 and the light diffusion structure 300. For example, Figure 2 In the display device shown, a plurality of support portions 400 are provided between the optical film 30 and the light-emitting plate 200. The support portions 400 can be configured to redirect light emitted from the light-emitting unit 220 to be emitted more towards the positive viewing angle of the display panel. The shape of the support portion 400 can have any desired shape; the shape shown in the figure is merely exemplary, for example, its cross-sectional shape parallel to the substrate 210 can be circular or polygonal, and / or, it can have a smooth upper surface.

[0156] For example, when the light-emitting panel 200 of the display device is placed parallel to the ground, the support portion 400 is configured to support the light-diffusing structure 300. For example, in the direction perpendicular to the substrate 210, the thickness of the support portion 400 may be equal to the distance between the light-diffusing structure 300 and the substrate 210, i.e., the second distance D2.

[0157] For example, the thickness of the support portion 400 in the direction perpendicular to the substrate 210 is less than the second distance D2. During the assembly and transportation of the display device, the light diffusion structure will inevitably come into contact with the support portion due to gravity. For example, when the display device is in use, the light-emitting plate and display panel are no longer placed parallel to the ground, but are placed vertically. Considering the coefficient of thermal expansion between the layers, the height of the support portion can be 1-2 mm smaller than the aforementioned second distance D2.

[0158] For example, such as Figure 6 and Figure 10AAs shown, connecting the multiple support portions 400 forms at least a first polygon 401 and a second polygon 402 parallel to the substrate 210, wherein the second polygon 402 surrounds the first polygon 401. For example, the shapes of the first polygon 401 and the second polygon 402 may be the same or different. The aforementioned "connecting the multiple support portions 400" can refer to connecting the geometric centers of the orthographic projections of the multiple support portions 400 onto the substrate 210 sequentially along a clockwise or counterclockwise direction.

[0159] For example, such as Figure 6 and Figure 10A As shown, the first polygon 401 includes multiple first diagonals 4011, the second polygon 402 includes multiple second diagonals 4021, at least two of the multiple first diagonals 4011 pass through the geometric center O of the light-emitting plate 200, and / or at least two of the multiple second diagonals 4021 pass through the geometric center O of the light-emitting plate 200.

[0160] When assembling and shipping the display device as a whole, the display device can be in a flat position. At this time, the light-emitting panel is located on the side of the light diffusion structure facing the ground. Due to gravity, the center position of the light diffusion structure will be lower than the surrounding positions. Therefore, by setting the position of the support part, it is helpful to alleviate the problem that the center position of the light diffusion structure is lower than the surrounding positions.

[0161] For example, the density of the support portion 400 corresponding to the central region of the light diffusion structure 300 can be greater than the density of the support portion 400 corresponding to the edge region of the light diffusion structure 300.

[0162] For example, such as Figure 6 and Figure 10A As shown, the light diffusion structure 300 includes multiple film layers. For example, the light diffusion structure 300 may include a first light diffusion layer 301 and a second light diffusion layer 302.

[0163] For example, for display devices of different sizes including a backlight, the backlight includes a light-emitting plate with multiple light-emitting units, a light diffusion structure, and other structures. The light diffusion structure may include two light diffusion layers, such as a first light diffusion layer and a second light diffusion layer. For example, one of the first light diffusion layer 301 and the second light diffusion layer 302 may be a particle-type diffusion plate, and the other of the first light diffusion layer 301 and the second light diffusion layer 302 may be a diffusion film with microstructures on its surface. For example, the thickness of the second light diffusion layer 302 is less than the thickness of the first light diffusion layer 301. However, this is not a limitation; the light diffusion structure may include three or more light diffusion layers.

[0164] For example, a particulate diffuser can refer to a substrate incorporating chemical particles as scattering particles. This causes light to undergo continuous refraction, reflection, and scattering in two media with different refractive indices as it passes through the scattering layer, thus producing an optical diffusion effect. For instance, the thickness of a particulate diffuser can be 1.5mm, 2mm, 2.5mm, or 3mm; a greater thickness results in better light uniformity but also greater brightness loss. The substrate can include polymethyl methacrylate (PMMA), polycarbonate (PC), polystyrene (PS), and polypropylene (PP), among others.

[0165] For example, a diffusion film with microstructures on its surface can be formed on the surface of a substrate using an imprinting process, creating a periodically arrayed array of micro-features. This allows light to be refracted in different directions as it passes through the micro-features, altering the light's path and resulting in more thorough scattering of incident light, thus achieving a softer and more uniform illumination effect. The thickness of this diffusion film is typically 90-100 μm. The substrates mentioned above can include polymethyl methacrylate (PMMA), polycarbonate (PC), polystyrene (PS), and polypropylene (PP), among others.

[0166] For example, the area of ​​any one of the multiple film layers is S0, and the area of ​​the first polygon 401 is S1, where S0 and S1 satisfy: S0 / S1≥16. By adjusting the area ratio of the light diffusion structure and the first polygon, the support portion can provide better support for the central region of the light diffusion structure.

[0167] For example, the area of ​​diaphragm 302 can be 293,560 square millimeters, and the area of ​​the first polygon 401 can be 17,873 square millimeters. Alternatively, the area of ​​diaphragm 302 can be 46,818 square millimeters, and the area of ​​the first polygon 401 can be 2,772 square millimeters.

[0168] For example, such as Figure 6 and Figure 10A As shown, the area of ​​the second polygon 402 is S2, and S0 and S2 satisfy: S0 / S2≥2. By adjusting the area ratio of the light diffusion structure and the second polygon, the relative positional relationship between the support and the light diffusion structure can be adjusted, so that the support provides better support for the edge area of ​​the light diffusion structure.

[0169] For example, the area of ​​diaphragm 302 can be 293,560 square millimeters, and the area of ​​the second polygon 402 can be 144,810 square millimeters. Alternatively, the area of ​​diaphragm 302 can be 46,818 square millimeters, and the area of ​​the second polygon 402 can be 17,728 square millimeters.

[0170] Figure 11 For including Figure 6 and Figure 10A A schematic diagram of a display device with a light-emitting panel. Figure 11 The layered diagram of the display panel and the light-emitting panel is shown only schematically. For example, as shown... Figure 6 , Figure 10A as well as Figure 11 As shown, the planar shape of the display panel 100 parallel to the substrate 210 is quadrilateral. The display panel 100 includes two long sides LE and two short sides SE, with the long sides LE and short sides SE alternately connected.

[0171] For example, such as Figure 6 , Figure 10A as well as Figure 11 As shown, the angle between the longest first diagonal 4011 among the multiple first diagonals 4011 and a straight line parallel to the long side LE (e.g., a straight line parallel to the X direction) is the first included angle θ1. The first included angle θ1 is the smallest among the multiple included angles between the multiple first diagonals 4011 and the aforementioned straight line.

[0172] For example, such as Figure 6 , Figure 10A as well as Figure 11 As shown, the angle between the shortest first diagonal 4011 and the aforementioned straight line is the second angle θ2, which is the largest among the multiple angles between the first diagonal 4011 and the aforementioned straight line. The dimension of the first polygon in the direction parallel to the long side of the display panel is larger than its dimension in the direction parallel to the short side of the display panel. Therefore, the deformation of the display panel in the direction of the long side is relatively large. According to finite element analysis of forces, adjusting the position, spacing, and density of the support columns is beneficial for the support part to support the light diffusion structure and the display panel.

[0173] For example, such as Figure 10A As shown, the light-emitting board 200 includes multiple sub-light-emitting boards 2001, each of which has at least one support portion 400. For example, since the size of the light-emitting board 200 is almost the same as the size of the display panel 100, when using a PCB board as the substrate 210 of the light-emitting board 200, due to the limitations of the PCB board material itself and the manufacturing process, a single PCB board cannot be used as the substrate of the light-emitting board 200 in large-size display devices; therefore, a multi-piece splicing method is required. For example, the substrate 210 of the light-emitting board 200 can also be made of glass. While a single piece of glass can be used as the substrate of the light-emitting board for large-size display devices, considering factors such as the yield of the LED bonding process, ease of maintenance, and cost, a multi-piece glass splicing method is often chosen for the substrate.

[0174] For example, the light-emitting panel 200 may include six sub-light-emitting panels 2001, which can be arranged in a 2*3 array or a 3*2 array. For example, the size of each sub-light-emitting panel 2001 may be 331.85mm*393mm. For example, the size of each sub-light-emitting panel 2001 may be 131.6mm*354.4mm. For example, the light-emitting panel 200 may include a first sub-light-emitting panel 2001-1, a second sub-light-emitting panel 2001-2, a third sub-light-emitting panel 2001-3, a fourth sub-light-emitting panel 2001-4, a fifth sub-light-emitting panel 2001-5, and a sixth sub-light-emitting panel 2001-6.

[0175] For example, each sub-light-emitting plate 2001 has a plurality of reserved positions 2002 on the side facing the light diffusion structure 300, and at least one reserved position 2002 on each sub-light-emitting plate 2001 is provided with a support portion 400. For example, the number of reserved positions 2002 provided on each sub-light-emitting plate 2001 is greater than the number of support portions 400 provided on each sub-light-emitting plate 2001.

[0176] For example, the number and relative positional relationship of the multiple reserved positions 2002 provided on different sub-light-emitting plates 2001 are the same, to facilitate the setting of the support and the mass production of the sub-light-emitting plates. For example, the number of reserved positions 2002 provided on the first sub-light-emitting plate 2001-1 is the same as the number of reserved positions 2002 provided on the fourth sub-light-emitting plate 2001-4, and they are symmetrically distributed with respect to the centerline axis along the X direction. For example, the number of reserved positions 2002 provided on the first sub-light-emitting plate 2001-1 is the same as the number of reserved positions 2002 provided on the sixth sub-light-emitting plate 2001-6, and they are centrally symmetrically distributed with respect to the geometric center.

[0177] Figure 10A The diagram schematically shows that the first polygon 401 is a parallelogram, with support portions 400 positioned at the four endpoints of the parallelogram. However, it is not limited to this; a support portion can also be provided at the reserved position 2002 on any side of the first polygon 401 to further increase the supporting force of the support portion.

[0178] For example, such as Figure 10AAs shown, at least two support portions 400 that are equidistant from the geometric center O and have the smallest distance are located on different sub-light-emitting plates 200, and these at least two support portions 400 constitute at least one vertex of the first polygon 4011. For example, the aforementioned at least two support portions 400 that are equidistant from the geometric center O and have the smallest distance may include two support portions 400 that are centrally symmetrically distributed with respect to the geometric center O. For example, the aforementioned at least two support portions 400 may include support portions 400 located at the vertices of the first polygon 4011, or they may include support portions 400 located on the edges of the first polygon 4011. By adjusting the support portions that are closer to the geometric center to be located on different sub-light-emitting plates, a distributed support effect of the support portions can be achieved, which can provide better support for the light diffusion structure while saving the number of support portions.

[0179] For example, at least two support portions 400 that are equidistant from the geometric center O and have the smallest distance can be two support portions 400 located at the two endpoints of the shortest first diagonal 4011 of the first polygon 401, and the two support portions 400 are centrally symmetrically distributed with respect to the geometric center O.

[0180] For example, such as Figure 10A As shown, at least one support portion 400 provided on each sub-light-emitting plate 2001 constitutes a vertex of the second polygon 402. For example, multiple support portions 400 may be provided on each sub-light-emitting plate 2001. The support portions 400 provided on each sub-light-emitting plate 2001 may include support portions 400 located at the vertices of the second polygon 402, or support portions 400 located on the edges of the second polygon 402.

[0181] by Figure 6 The light-emitting unit 220 in the light-emitting panel 200 shown is Figure 9 The arrangement shown is an example, but it is not limited to this; other arrangements are also possible. Figure 8 The arrangement is shown below. For example, as shown... Figure 6 , Figure 9 as well as Figure 10A As shown, the four light-emitting units 220 constituting the quadrilateral 203 form a light-emitting unit group 2200, and the support part 400 is located between adjacent light-emitting unit groups 2200, thereby reducing the influence of the support part on the light efficiency of the light-emitting units in each light-emitting unit group.

[0182] For example, Figure 2 The back frame 43 shown can protect and support the light-emitting plate 200, or have a certain heat dissipation function. For example, the light-emitting plate 200 may also include multiple screw holes, in which screws configured to fix the substrate 210 and the back frame can be installed. For example, the screw holes may be distributed between adjacent light-emitting unit groups, thereby reducing the impact of the screw holes on the luminous efficiency of the light-emitting units in each light-emitting unit group.

[0183] For example, such as Figure 10A As shown, the reserved position 2002 includes a through hole penetrating the substrate 210. For example, the ratio of the area of ​​each reserved position 2002 to the area of ​​each screw hole can be 0.9 to 1.1. For example, the area of ​​each reserved position 2002 can be equal to the area of ​​each screw hole. The area of ​​each reserved position 2002 can be 14.56 square millimeters, and the area of ​​each screw hole can be 14.522 square millimeters. By setting the through hole area of ​​the reserved position to be substantially equal to the through hole area of ​​the screw hole, it is easier to distinguish different hole positions during installation, improving efficiency and yield; it can also reduce the difference in the impact of different hole area areas on the luminous efficiency of the light-emitting unit group.

[0184] For example, screw holes can be circular through holes. For example, the through holes included in the reserved positions can be vertically elliptical through holes. Here, "vertical" can refer to a direction parallel to the short side of the display panel. For example, the substrate can also be provided with positioning holes, which can include horizontally elliptical through holes and circular through holes. Here, "horizontal" can refer to a direction parallel to the long side of the display panel.

[0185] For example, such as Figure 10A As shown, multiple sub-light-emitting plates 2001 are arranged along a first direction (e.g., Figure 10A The X direction shown) and the second direction (as shown) Figure 10A The array is arranged in the Y direction as shown, and at least some of the structures on the multiple sub-light-emitting plates 2001 are centrally symmetrically distributed with respect to the geometric center O of the light-emitting plate 200.

[0186] For example, the support portions 400 on multiple sub-light-emitting panels 2001 are centrally symmetrically distributed with respect to the geometric center O of the light-emitting panel 200. For example, the support portions 400 on the third sub-light-emitting panel 2001-3 and the fourth sub-light-emitting panel 2001-4 are centrally symmetrically distributed with respect to the geometric center O of the light-emitting panel 200. For example, the support portions 400 on the first sub-light-emitting panel 2001-1 and the sixth sub-light-emitting panel 2001-6 are centrally symmetrically distributed with respect to the geometric center O of the light-emitting panel 200. For example, the support portions 400 on the second sub-light-emitting panel 2001-2 and the fifth sub-light-emitting panel 2001-5 are centrally symmetrically distributed with respect to the geometric center O of the light-emitting panel 200.

[0187] Figure 10B for Figure 10A The diagram shows the side of the sub-light-emitting panel without any light-emitting units. For example, as shown... Figure 10BAs shown, each sub-light-emitting board 2001 has a driving circuit 610 on the side (such as the back) where no light-emitting unit is set. The multiple driving circuits 610 on the multiple sub-light-emitting boards 2001 are centrally symmetrically distributed with respect to the geometric center O of the light-emitting board 200, thereby minimizing the difference in trace length in different driving circuits.

[0188] For example, the display device also includes a converter 630 and a timing controller 620. The timing controller 620 generates and provides drive control signals to the converter 630. The converter 630 converts the drive control signals and divides them into multiple control signals, which are then provided to the drive circuits 610 on each sub-light-emitting board 2001. The drive circuits 610 then accurately distribute the signals corresponding to each light-emitting unit group. For example, the drive circuits 610 on each sub-light-emitting board 2001 are electrically connected to the converter 630. By centrally symmetrically distributing the multiple sub-light-emitting boards relative to the geometric center, it is beneficial to position the converter and the drive circuits on each sub-light-emitting board, minimizing the difference in connection trace lengths and avoiding large signal delays on the traces. Each sub-light-emitting board 2001 includes at least one drive circuit 610, which can be an integrated circuit, a flexible circuit board, a flip-chip film, a programmable logic array, a thin-film transistor, or a combination thereof.

[0189] Figure 12 A partial cross-sectional structural schematic diagram of a display device provided according to an example embodiment of the present disclosure. Figure 13A for Figure 12 A schematic diagram of the planar structure of the reflective film in the display device shown. Figure 12 The reflective film in the middle is along Figure 13A The cross section intercepted by line BB' shown. Figure 12 The distance between the light-emitting plate 200 and the light-diffusing structure 300 shown can be... Figure 6 The distance between the light-emitting panel 200 and the light-diffusing structure 300 in the display device shown is the same. For example, as Figure 12 As shown, the display device also includes a reflective film 500 located between the substrate 210 and the light diffusion structure 300. Figure 12 The display panel 100, light diffusion structure 300, and light-emitting plate 200 shown can be connected with Figure 6 The display panel 100, light diffusion structure 300 and light-emitting plate 200 in the display device shown have the same features, which will not be described again here.

[0190] For example, such as Figure 12 and Figure 13A As shown, the reflective film 500 includes a plurality of first openings 501, which are configured to expose at least a portion of the reserved spaces of a plurality of reserved spaces. For example, the first openings 501 are configured to pass through the support portion 400.

[0191] For example, such as Figure 12 and Figure 13A As shown, the reflective film 500 also includes a plurality of second openings 502, which are configured to expose at least a portion of the light-emitting units 220 of the plurality of light-emitting units 220.

[0192] For example, the reflective film 500 may also include an opening configured to expose screw holes and an opening configured to expose positioning holes, etc.; the reflective film 500 may also cover screw holes, positioning holes, etc. to prevent their exposure, which may be configured according to the actual product, and the embodiments disclosed herein do not limit this.

[0193] For example, the multiple openings of the reflective film 500 only expose the light-emitting unit 220 and the necessary reserved positions, screw holes, and other structures, which can maximize the overall reflectivity of the reflective film.

[0194] For example, such as Figure 13A As shown, the reflective film 500 includes two sub-reflective films 510 and 520, with a gap between them to allow for thermal expansion of the reflective film. For example, a reflective strip 700 can be separately attached to the gap between the two sub-reflective films. Figure 10A and Figure 13A As shown, a reflective film 510 is attached to the first sub-light-emitting plate 2001-1, the fourth sub-light-emitting plate 2001-4, a portion of the second sub-light-emitting plate 2001-2, and a portion of the fifth sub-light-emitting plate 2001-5; and a reflective film 520 is attached to the third sub-light-emitting plate 2001-3, the sixth sub-light-emitting plate 2001-6, another portion of the second sub-light-emitting plate 2001-2, and another portion of the fifth sub-light-emitting plate 2001-5.

[0195] For example, the reflective film 500 may include multiple layers, such as white ink and / or a reflective sheet disposed on the substrate 210. For example, the white ink may be patterned before bonding the light-emitting unit and mounting support, and the reflective sheet may be attached to the light-emitting plate after the light-emitting unit support is installed. For example, the material of the reflective strip 700 may be the same as that of the reflective film.

[0196] For example, the reflective film 500 can block the test points on the light-emitting panel 200 as much as possible. These test points can be used to test the electrical performance and other characteristics of the light-emitting unit.

[0197] Figure 13B This is a schematic diagram of a reflective film in another example of an embodiment of this disclosure. (See diagram below.) Figure 13B As shown, the reflective film 500 includes two sub-reflective films 510 and 520, and the two sub-reflective films 510 and 520 are partially overlapped. Figure 13B The two sub-reflective films shown are related in terms of their relative positions and... Figure 13A The two sub-reflective films shown are different in their relative positions. Figure 13B The reflective film shown can be combined with Figure 13A The reflective films shown have the same characteristics, which will not be repeated here.

[0198] Figure 14A This is a structural diagram of a support portion according to some embodiments of the present disclosure; Figure 14B This is a structural diagram of another support portion according to some embodiments of the present disclosure; Figure 14C This is a structural diagram of yet another support portion according to some embodiments of the present disclosure; Figure 14D This is a structural diagram of yet another support portion according to some embodiments of the present disclosure; Figure 15A This is a structural diagram of yet another support portion according to some embodiments of the present disclosure; Figure 15B This is a structural diagram of another support portion according to some embodiments of the present disclosure.

[0199] For example, such as Figure 14A As shown, the support portion 400 includes a base 1313 disposed in the first opening of the reflective film, and a first main body portion 1314 located on the side of the base 1313 away from the substrate and connected to the base 1313.

[0200] By mounting the base 1313 of the support portion 400 within the first opening of the reflective film, the displacement of the support portion 400 along a direction parallel to the plane of the substrate can be limited, ensuring the uniformity of the distribution of the support portion 400 in the direction parallel to the substrate. This reduces the deformation differences in different regions of the optical film included in the light diffusion structure supported by the support portion 400, improves the surface flatness of the optical film, and ensures its optical performance. The first main body 1314 of the support portion 400 is used to support the optical film to reduce the deformation of the optical film caused by force.

[0201] For example, such as Figure 14A As shown, the side of the base 1313 away from the first main body 1314 is the first bottom surface 1311, the side of the base 1313 connected to the first main body 1314 is the first top surface 1315, and the side of the first main body 1314 connected to the base 1313 is the second bottom surface 1312. The orthographic projection of the second bottom surface 1312 on the substrate covers the orthographic projection of the first top surface 1315 on the substrate, so that the base 1313 and the first main body 1314 form a stepped surface. The thickness of the base 1313 in the direction perpendicular to the substrate is less than or equal to the depth of the first opening of the reflective film.

[0202] For example, by using the stepped surface formed by the first bottom surface 1311 and the second bottom surface 1312, the first bottom surface 1311 abuts against the surface of a certain film layer on the light-emitting plate, and the second bottom surface 1312 abuts against the surface of the reflective film, thereby limiting the support part 400 and adjusting the installation height of the support part 400. This improves the uniformity of the installation height of each support part 400, making the support height of each support part 400 on the corresponding area of ​​the optical film approximately equal, and the deformation of different areas of the optical film approximately equal. This is beneficial to improving the surface flatness of the optical film and ensuring its optical performance.

[0203] For example, the orthographic projection of the second bottom surface 1312 of the support portion 400 onto the substrate covers the orthographic projection of the corresponding first opening onto the substrate, so that the second bottom surface 1312 of the support portion 400 can block the first opening, which can prevent the reflection area of ​​the reflective film from being reduced due to the first opening in the reflective film, thereby avoiding affecting the overall light emission efficiency of the light-emitting panel and the display effect of the display device.

[0204] For example, along the thickness direction Z of the substrate and in the direction U from the base 1313 to the first main body 1314, the area of ​​the cross section of the first main body 1314 along the direction S parallel to the plane of the substrate gradually decreases.

[0205] With the above configuration, the volume of the first main body 1314 can be reduced while keeping the area of ​​the second bottom surface 1312 of the first main body 1314 unchanged. This reduces the light-blocking effect of the first main body 1314 of the support 400 on light, increases the amount of light emitted by the light-emitting plate in the Z direction along the thickness of the substrate, and thus improves the light emission efficiency of the light-emitting plate.

[0206] For example, such as Figure 14A As shown, the first main body 1314 of the support portion 400 includes a plurality of cross sections along a direction S parallel to the plane of the substrate, at least one of which is greater than or equal to the area of ​​the cross section located on the side of the cross section away from the substrate.

[0207] For example, such as Figure 14A As shown, the first main body portion 1314 of the support portion 400 can be cone-shaped. For example... Figure 14B As shown, the first main body 1314 of the support 400 can also be frustum-shaped. For example... Figure 14C As shown, the first main body 1314 of the support 400 can also be in the shape of a column.

[0208] In some embodiments, the support portion 400 is Figure 14DIn the structure shown, the base 1313 of the support portion 400 is a snap fastener, which includes a first bottom surface 1311 near the substrate. The first main body 1314 of the support portion 400 includes a seat body connected to the snap fastener, and a frustum connected to the seat body and located on the side of the seat body away from the snap fastener, wherein the seat body includes a second bottom surface 1312 connected to the snap fastener.

[0209] For example, the reserved positions on the substrate of the light-emitting plate include through holes. Figure 14D The base 1313 of the support 400 shown passes through the through hole of the substrate and is engaged with the through hole of the substrate to fix the support 400. However, it is not limited to this; the support can also be bonded to the substrate, in which case the reserved position does not need to be provided with a through hole.

[0210] For example, a fixing layer is provided in the first opening of the reflective film, and at least a portion of the base 1313 of the support 400 is embedded in the fixing layer and connected to the fixing layer, so that the support 400 is fixed to the substrate through the fixing layer.

[0211] For example, if the fixing layer is not cured, the base 1313 of the support part 400 is embedded in the fixing layer, causing some glue to overflow from the first opening. There will be glue between the second bottom surface 1312 of the support part 400 and the reflective film. The thickness of this glue after curing is small, and the thickness range can be 0 to 10 micrometers.

[0212] By extending the base 1313 of the support portion 400 into the fixing layer, the bonding area between the support portion 400 and the fixing layer can be increased, thereby improving the bonding strength between the support portion 400 and the fixing layer. Furthermore, the bonding strength between the support portion 400 and the fixing layer can be further improved by increasing the bonding area between the base 1313 of the support portion 400 and the fixing layer, for example, by using... Figure 14A The support part 400 has a base 1313 with an internally hollow cylindrical structure, which allows the interior of the base 1313 to be bonded to the fixing layer.

[0213] For example, such as Figure 14A As shown, the shape of the base 1313 of the support portion 400 projected onto the substrate can be annular, meaning the base 1313 has a hollow cylindrical structure. For example, as... Figure 14B As shown, the base 1313 can also be cylindrical. For example, as Figure 14C As shown, the base 1313 includes a plurality of protrusions 1315 extending from the second bottom surface 1312 toward the substrate.

[0214] For example, such as Figure 15AAs shown, the support portion 400 includes a base 1322 and a second main body portion 1323 located on the side of the base 1322 away from the substrate and connected to the base 1322. At least one groove 1321 is provided on the side of the base 1322 near the substrate, and the radial dimension D02 of the orthographic projection of the side of the second main body portion 1323 near the base 1322 on the substrate is smaller than the radial dimension D03 of the orthographic projection of the side of the base 1322 near the second main body portion 1323 on the substrate.

[0215] For example, such as Figure 15A As shown, the radial dimension D02 of the orthographic projection of the side of the second main body 1323 near the base 1322 onto the substrate is smaller than the radial dimension D03 of the orthographic projection of the side of the base 1322 near the second main body 1323 onto the substrate. The base 1322 of the support portion 400 is cylindrical in shape, and the second main body 1323 is conical in shape. This is equivalent to removing part of the volume of the cylinder to obtain a smaller volume support portion 400, thereby reducing the light-blocking effect of the support portion 400.

[0216] For example, such as Figure 15B As shown, the radial dimension D02 of the orthographic projection of the side of the second main body 1323 near the base 1322 onto the substrate is smaller than the radial dimension D03 of the orthographic projection of the side of the base 1322 near the second main body 1323 onto the substrate. The base 1322 of the support portion 400 is shaped like a frustum, and the second main body 1323 is shaped like a cone. This is equivalent to removing part of the cone's volume to obtain a smaller volume support portion 400, thereby reducing the light-blocking effect of the support portion 400.

[0217] For example, the side of the support 400 closest to the substrate is fixedly connected to the substrate by a fixing layer.

[0218] For example, a fixing layer is provided in the first opening of the reflective film, and the side of the support 400 near the substrate is fixedly connected to the substrate through the fixing layer.

[0219] For example, the support portion 400 is disposed on the side of the reflective film away from the substrate, and a fixing layer is disposed between the support portion 400 and the reflective film. The side of the support portion 400 closest to the substrate is fixedly connected to the substrate through the fixing layer. For example, the thickness of the fixing layer should be relatively thin, and the thickness range can be 30μm to 100μm, such as 30μm, 40μm, 65μm, 80μm or 100μm, to improve the adhesion strength between the support portion 400 and the fixing layer.

[0220] For example, the maximum radial dimension of the support portion 400 ranges from 2 mm to 10 mm. For example, the height of the support portion 400 ranges from 1 mm to 12 mm.

[0221] Figure 16 for Figure 4A or Figure 6 A schematic diagram of the light-emitting panel in the display device shown, and at least a portion of the structure of the light-emitting panel facing the display panel. (See diagram) Figure 16 As shown, a diffuse layer 031, a brightness enhancement film 032 and 033, and a color conversion layer 034 are also provided between the light diffusion structure 300 and the display panel.

[0222] For example, such as Figure 16 As shown, the brightness enhancement film 033 includes protrusions on its surface away from the light-emitting plate 200. For example, the brightness enhancement film 033 can be a prism layer, which acts as a light-focusing layer to improve the brightness of the light emitted from the front viewing angle. For example, the brightness enhancement film 032 is an additional brightness enhancement film disposed on the side of the brightness enhancement film 033 away from the light-emitting plate 200 to further collimate the backlight, thereby increasing the brightness of the display device.

[0223] For example, such as Figure 16 As shown, the color conversion layer 034 is located between the brightness enhancement film 033 and the light diffusion structure 300. For example, the color conversion layer 034 can convert light from the light-emitting unit from one color to another. For example, when the light-emitting unit emits blue light, the color conversion layer 034 may include a phosphor layer that converts blue light into white light. For example, the phosphor layer may include quantum dots that convert blue light into red and green light. For example, in addition to the phosphor layer, the color conversion layer 034 may include a partially reflective layer. For example, the partially reflective layer (also called a dichroic layer or dichroic filter layer) can reflect all red and green light and partially reflect blue light.

[0224] For example, such as Figure 16 As shown, film layers 301 and 302 can be attached using an adhesive. For example, film layers 301 and 302 can be laminated together to form a monolithic film. For example, film layer 302 has an upper surface with a microlens 036. The microlens 036 can be formed by a plurality of grooves in the surface of film layer 302 away from the light-emitting plate 200. For example, a plurality of protrusions 037 protruding from film layer 302 toward the light-emitting plate 200. For example, film layer 301 has an upper surface with a microlens 035. The microlens 035 can be formed by a plurality of grooves in the surface of film layer 301 away from the light-emitting plate 200, and the microlens 035 can reduce total internal reflection.

[0225] The following points need to be explained:

[0226] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure, and other structures can be referred to the general design.

[0227] (2) Where there is no conflict, features of the same embodiment and different embodiments of this disclosure may be combined with each other.

[0228] The above description is merely an exemplary embodiment of this disclosure and is not intended to limit the scope of protection of this disclosure, which is determined by the appended claims.

Claims

1. A display device, comprising: Display panel; A light-emitting panel is located on the non-display side of the display panel and is stacked with the display panel; A light diffusion structure is located between the light-emitting plate and the display panel; The light-emitting plate includes a substrate and a plurality of light-emitting units disposed on the substrate, wherein the maximum size of at least one light-emitting unit in the direction parallel to the substrate is no more than 3 mm. The plurality of light-emitting units includes four adjacent light-emitting units. The center lines connecting the four light-emitting units form a parallelogram. Any two light-emitting units are arranged adjacent to each other. The center line connecting the two light-emitting units that are furthest apart from each other in the parallelogram passes through two first points on the adjacent edges of the two light-emitting units. The distance between the two first points is a first distance D1. The angle between the outermost ray emitted by the light-emitting unit and the plane parallel to the substrate is θ. The minimum distance between the adjacent surfaces of the display panel and the substrate is not less than D1*tanθ / 2. The angle between the outermost ray emitted by the light-emitting unit and the normal to the light-emitting surface of the light-emitting unit is α. 1 / 2 , where α 1 / 2 The light intensity of the light source at the outermost edge of the light-emitting unit is half of the light intensity of the light-emitting unit along the normal direction, and is complementary to θ.

2. The display device according to claim 1, wherein, The light diffusion structure includes at least two diffusion layers stacked together.

3. The display device according to claim 2, wherein, In the at least two diffusion layers, an adhesive is disposed between at least two adjacent diffusion layers; or... The at least two diffusion layers are laminated together to form a monolithic film; or... An optical film is sandwiched between at least two adjacent diffusion layers.

4. The display device according to claim 2, wherein, The at least two diffusion layers include a first light diffusion layer and a second light diffusion layer stacked together, wherein one of the first light diffusion layer and the second light diffusion layer is a particle diffusion plate and the other is a diffusion film with microstructures on its surface.

5. The display device according to claim 1, wherein, The distance between the center line connecting any two adjacent light-emitting units in the plurality of light-emitting units and the two points on the edges of the two light-emitting units that are close to each other is not less than the minimum distance between the light-emitting unit located at the outermost edge of the light-emitting plate and the edge of the light-emitting plate.

6. The display device according to claim 1, wherein, Multiple driving circuits are provided on the side of the light-emitting panel that does not have the multiple light-emitting units.

7. The display device according to claim 6, wherein, The light-emitting panel includes multiple sub-light-emitting panels, and each of the multiple sub-light-emitting panels is provided with at least one of the multiple driving circuits.

8. The display device according to claim 6, wherein, The multiple driving circuits are centrally symmetrically distributed.

9. The display device according to claim 1, wherein, The light-emitting plate includes multiple sub-light-emitting plates. A reflective film is disposed between the substrate and the light diffusion structure. The reflective film includes multiple sub-reflective films, and there is a gap between two sub-reflective films. The two sub-reflective films are attached to different parts of the same sub-light-emitting plate.

10. The display device according to claim 1, wherein, A reflective film is disposed between the substrate and the light diffusion structure. The reflective film includes a plurality of sub-reflective films, and at least two of the plurality of sub-reflective films are partially overlapped.

11. The display device according to claim 1, wherein, At least some of the light-emitting units are arranged in an array along a first direction and a second direction, wherein the first direction intersects the second direction; The parallelogram is formed by connecting the centers of two adjacent light-emitting units arranged along the first direction and two light-emitting units that are respectively adjacent to the two adjacent light-emitting units in the second direction. The angle between the sides of the parallelogram and the first direction or the second direction is between -20° and 20°.

12. The display device according to claim 1, wherein, The thickness of the light diffusion structure in the direction perpendicular to the substrate is less than D1*tanθ / 2. The light diffusion structure is spaced apart from the light-emitting plate. The cross-section of the light-emitting unit by the extension of the line connecting the two first points has a dimension of L. The distance between the surface of the light diffusion structure facing the light-emitting plate and the surface of the light-emitting unit facing the substrate is a second distance D2. The second distance D2 satisfies: D1*tanθ / 2 <D2<[(3*D1+2L)*tanθ] / 2。 13. The display device according to claim 1, wherein, The light diffusion structure is in direct contact with at least a portion of the light-emitting unit, the thickness of the light-emitting unit in the direction perpendicular to the substrate is H1, and the thickness H2 of the light diffusion structure satisfies: D1*tanθ / 2-H1≤H2≤5mm.

14. The display device according to any one of claims 1-11 and 13, wherein, The light-emitting unit includes an unpackaged light-emitting diode chip, wherein the maximum size of the unpackaged light-emitting diode chip in the direction parallel to the substrate is no greater than 500 micrometers.

15. The display device according to claim 14, wherein, The side of each of the multiple light-emitting units facing the display panel is provided with a protective layer.

16. The display device according to any one of claims 1-13, wherein, The light-emitting unit includes a light-emitting diode chip and a packaging structure configured to encapsulate the light-emitting diode chip, with a gap between the packaging structures of adjacent light-emitting units.

17. The display device according to claim 16, wherein, The encapsulation structure is doped with color conversion material.

18. The display device according to any one of claims 1-13, wherein, The light-emitting panel includes a first region and a second region located at the edge of the first region. The light-emitting units in the first region are arranged in an array. In the second region, the center line connecting a light-emitting unit and any adjacent light-emitting unit passes through two second points on the edges of the two light-emitting units that are close to each other. The distance between the two second points is less than the first distance.

19. The display device according to claim 18, wherein, In the second region, the ratio of the distance between the two second points to the first distance is 0.6 to 0.

9.

20. The display device according to claim 11, wherein, The light-emitting panel includes multiple rows of light-emitting units, each row including at least two light-emitting units arranged along the first direction. The multiple rows of light-emitting units are arranged in a direction perpendicular to the first direction. The first distance between the two light-emitting units in the outermost row and its adjacent row is smaller than the first distance between the two light-emitting units in other adjacent rows; and / or, The light-emitting panel includes multiple light-emitting unit columns, each light-emitting unit column including at least two light-emitting units arranged along the second direction. The multiple light-emitting unit columns are arranged in a direction perpendicular to the second direction. The first distance between the two light-emitting units in the outermost light-emitting unit column and the light-emitting unit column immediately adjacent to it is less than the first distance between the two light-emitting units in the other two adjacent light-emitting unit rows.

21. The display device according to claim 12, wherein, A plurality of support portions are provided between the light-emitting plate and the light-diffusing structure. The lines connecting the plurality of support portions form at least a first polygon and a second polygon parallel to the substrate. The second polygon surrounds the first polygon. The first polygon includes a plurality of first diagonals, and the second polygon includes a plurality of second diagonals. At least two of the plurality of first diagonals pass through the geometric center of the light-emitting plate, and / or at least two of the plurality of second diagonals pass through the geometric center of the light-emitting plate.

22. The display device according to claim 21, wherein, The thickness of the support portion in the direction perpendicular to the substrate is less than the second distance.

23. The display device according to claim 12, 21 or 22, wherein, The value of θ is between 20° and 30°, and the value of D1 / L is between 3 and 10.

24. The display device according to claim 13, wherein, The dimension of the cross section of the light-emitting unit intercepted by the extension of the line connecting the two first points is L, the value of θ is between 10° and 25°, and the value of D1 / L is 5 to 11.

25. The display device according to claim 21 or 22, wherein, The display panel has a quadrilateral shape parallel to the substrate, and the planar shape of the display panel includes two long sides and two short sides, with the long sides and the short sides alternately connected. The angle between the longest first diagonal passing through the geometric center of the light-emitting plate and the straight line parallel to the long side is the first included angle. The first included angle is the smallest among the multiple included angles between the first diagonal passing through the geometric center of the light-emitting plate and the straight line.

26. The display device according to claim 25, wherein, The angle between the shortest first diagonal passing through the geometric center of the light-emitting plate and the straight line is the second angle, which is the largest of the multiple angles between the first diagonal passing through the geometric center of the light-emitting plate and the straight line.

27. The display device according to claim 21 or 22, wherein, The light-emitting panel includes multiple sub-light-emitting panels, and each sub-light-emitting panel is provided with at least one support portion.

28. The display device according to claim 27, wherein, At least two support portions that are equidistant from the geometric center and have the smallest distance are located on different sub-light-emitting plates, and the at least two support portions constitute at least one vertex of the first polygon.

29. The display device according to claim 27, wherein, At least one support portion provided on each sub-light-emitting plate constitutes a vertex of the second polygon.

30. The display device according to claim 27, wherein, At least some of the light-emitting units are arranged in an array along a first direction and a second direction, wherein the first direction intersects the second direction; The plurality of sub-light-emitting plates are arranged in an array along the first direction and the second direction, and at least a portion of the structure on the plurality of sub-light-emitting plates is centrally symmetrical about the geometric center.

31. The display device according to claim 30, wherein, The at least part of the structure includes the support portion and the drive circuit.

32. The display device according to claim 21 or 22, wherein, At least two adjacent light-emitting units constitute a light-emitting unit group, and the support is located between adjacent light-emitting unit groups.

33. The display device according to any one of claims 1-13, further comprising: A color conversion layer is located between the light diffusion structure and the display panel.

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