Dodging structural plate, light-emitting module and display device

Abstract

The invention provides a dodging structural plate, an optical module and a display device. The light-uniformizing structural plate comprises a structural plate body, the structural plate body comprises a first surface and a second surface which are oppositely arranged, the light-emitting substrate comprises a substrate and a plurality of light-emitting elements arranged on the substrate, and the first surface of the light-uniformizing structural plate is used for being attached to the side, facing the light-emitting elements, of the substrate; a plurality of first grooves are formed in the first surface, the cross section area of each first groove is gradually reduced in the depth direction of the first groove, and when the first surface is attached to the light-emitting substrate, orthographic projections of the light-emitting elements on the substrate are located in the first grooves; a plurality of second grooves are formed in the second surface, the cross section areas of the second grooves are gradually reduced in the depth direction of the second grooves, and the density of the second grooves is larger than that of the first grooves. The optical module adopting the dodging structural plate disclosed by the invention has smaller thickness and better dodging effect, is beneficial to realizing ultra-thinness, and reduces the cost.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a light uniforming structure plate, a light emitting module and a display device. Background Art

[0002] The liquid crystal display device includes a backlight module and a liquid crystal display panel. In the related art, the backlight source in the backlight module can adopt a light-emitting substrate, on which a plurality of inorganic light-emitting diode chips (LED chips) are arranged. The spacing between the LED chips is a key factor affecting the thickness of the backlight module and the contrast of the display device. The spacing between the LED chips determines the degree of Mura (defect) of the screen. The larger the spacing between the LED chips, the more serious the Mura. Although reducing the spacing between the LED chips can improve Mura, it will lead to an increase in the number of LED chips, resulting in an increase in cost.

[0003] Another way to improve Mura is to use a uniform light layer to uniformly distribute the light generated by the LED chip. The uniform light layer includes an air layer and a uniform light film layer. The use of the air layer and the uniform light film layer increases the thickness of the backlight module, which is not conducive to achieving ultra-thin products. Summary of the invention

[0004] The embodiments of the present disclosure provide a light-homogenizing structure plate, a light-emitting module and a display device to solve or alleviate one or more technical problems in the prior art.

[0005] As a first aspect of an embodiment of the present disclosure, an embodiment of the present disclosure provides a light-homogenizing structure plate for cooperating with a light-emitting substrate, the light-homogenizing structure plate includes a structure plate body, the structure plate body includes a first surface and a second surface arranged opposite to each other, the light-emitting substrate includes a base substrate and a plurality of light-emitting elements arranged on the base substrate, and the first surface of the light-homogenizing structure plate is used to fit with a side of the base substrate facing the light-emitting elements;

[0006] The first surface is provided with a plurality of first grooves, the cross-sectional area of ​​the first grooves gradually decreases along the depth direction of the first grooves, and when the first surface is attached to the light-emitting substrate, the orthographic projection of the light-emitting element on the substrate is located within the orthographic projection of the first grooves on the substrate;

[0007] The second surface is provided with a plurality of second grooves, the cross-sectional areas of the second grooves gradually decrease along the depth direction of the second grooves, and the density of the second grooves is greater than the density of the first grooves.

[0008] In some embodiments, the first groove is a conical curved groove.

[0009] In some embodiments, a longitudinal cross-section of the first groove is in the shape of a parabola, an ellipse, or a circular arc.

[0010] In some embodiments, the opening diameter of the first groove ranges from 0.5 mm to 0.7 mm; and / or the depth of the first groove ranges from 0.6 mm to 1.0 mm.

[0011] In some embodiments, the second groove is a tapered groove or a tapered curved groove.

[0012] In some embodiments, an angle between a side wall of the second groove connected to an opening edge of the second groove and a plane where the second surface is located is 30° to 40°.

[0013] In some embodiments, the second groove has a depth ranging from 0.05 mm to 0.15 mm.

[0014] In some embodiments, opening edges of the plurality of second grooves abut against each other.

[0015] In some embodiments, the distance between the first surface and the second surface of the light uniforming structure plate is 2.5 mm to 3.5 mm.

[0016] As a second aspect of the embodiment of the present disclosure, the embodiment of the present disclosure provides a light-emitting module, including:

[0017] A light-emitting substrate, comprising a base substrate and a plurality of light-emitting elements arranged on the base substrate;

[0018] In any embodiment of the present disclosure, the first surface of the light-evening structure plate is bonded to the side of the base substrate facing the light-emitting element, the multiple first grooves of the light-evening structure plate correspond one-to-one to the multiple light-emitting elements, and the orthographic projection of the light-emitting element on the base substrate is located within the orthographic projection of the first groove on the base substrate.

[0019] In some embodiments, an optical film material is also included, and the optical film material is located on the second surface of the light uniforming structure plate.

[0020] As a third aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a display device, including the light-emitting module in any embodiment of the present disclosure, and also including a display panel, which is located on the side of the light-homogenizing structure plate away from the light-emitting substrate.

[0021] According to the technical solution of the disclosed embodiment, the light-homogenizing structure plate has a better light-homogenizing effect. After the light-emitting module adopts the light-homogenizing structure plate, the light-homogenizing structure plate is bonded to the light-emitting substrate to obtain a very good light-homogenizing effect, thereby improving the added value of the light-emitting substrate. When the light-emitting module is used as a backlight module of a display device, a diffusion plate is no longer required, thereby reducing the difficulty of assembly and further reducing the thickness of the module, which is conducive to realizing ultra-thin display devices.

[0022] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present disclosure will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments according to the present disclosure and should not be regarded as limiting the scope of the present disclosure.

[0024] Figure 1 It is a structural schematic diagram of a light-emitting module in one embodiment of the present disclosure;

[0025] Figure 2 for Figure 1 Partial schematic diagram of the light-homogenizing structure panel;

[0026] Figure 3 is a longitudinal cross-sectional schematic diagram of a first groove in one embodiment;

[0027] Figure 4 is a longitudinal cross-sectional schematic diagram of a second groove in another embodiment;

[0028] Figure 5A is a schematic plan view of the second surface of the light homogenizing structure plate in one embodiment;

[0029] Figure 5B is a schematic plan view of the second surface of the light homogenizing structure plate in another embodiment;

[0030] Figure 6 This is a schematic diagram of the preparation process of a light-emitting module according to an embodiment of the present disclosure;

[0031] Figure 7 A schematic structural diagram of a display device in another embodiment of the present disclosure;

[0032] Figure 8 It is a structural schematic diagram of a display device in the related art;

[0033] Fig. 9 for Figure 8 A partial schematic diagram of the

[0034] Fig.10 A schematic diagram of light transmission when simulating the light-emitting module of the embodiment of the present disclosure;

[0035] Fig.11 for Figure 7 A schematic diagram of a light-emitting screen of the display device shown;

[0036] Fig.12 for Figure 8 A schematic diagram of a light output image of a display device is shown.

[0037] Description of reference numerals:

[0038] 10. Back panel; 20. Light-emitting substrate; 21. Base substrate; 22. Light-emitting element; 30. Light-homogenizing structural plate; 31. First groove; 32. Second groove; 33. Structural plate body; 40. Optical film material; 50. Display panel; 60. Structural frame. DETAILED DESCRIPTION

[0039] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present disclosure, and different embodiments may be combined arbitrarily without conflict. Therefore, the drawings and descriptions are considered to be illustrative in nature and not restrictive.

[0040] The inorganic light emitting diode (LED) chip in the present disclosure may be a sub-millimeter light emitting diode (Mini Light Emitting Diode, referred to as Mini LED) chip, or may be a micro light emitting diode (Micro Light Emitting Diode, referred to as Micro LED) chip.

[0041] Figure 1 is a schematic structural diagram of a light-emitting module in an embodiment of the present disclosure, Figure 2 for Figure 1 A partial schematic diagram of the light-homogenizing structure panel. Figure 1 and Figure 2 As shown, the light emitting module includes a light homogenizing structure plate 30, and the light homogenizing structure plate 30 is used to cooperate with the light emitting substrate 20. The light homogenizing structure plate 30 includes a structure plate body 33, and the structure plate body 33 includes a first surface and a second surface that are arranged oppositely. Figure 1 and Figure 2 In the embodiment, the first surface of the light homogenizing structure plate 30 is the lower side of the light homogenizing structure plate 30, and the second surface of the light homogenizing structure plate 30 is the upper side of the light homogenizing structure plate 30. The light emitting substrate 20 includes a base substrate 21 and a plurality of light emitting elements 22 arranged on the base substrate 21. The first surface of the light homogenizing structure plate 30 is used to fit with the side of the base substrate 21 facing the light emitting element 22.

[0042] like Figure 1 and Figure 2As shown, the first surface is provided with a plurality of first grooves 31, and the cross-sectional area of ​​the first grooves 31 gradually decreases along the depth direction of the first grooves 31. When the first surface is attached to the light-emitting substrate 20, the orthographic projection of the light-emitting element 22 on the base substrate 21 is located within the orthographic projection of the first grooves 31 on the base substrate 21, so that the light-emitting element 22 is located in the first grooves 31, and the first grooves 31 are buckled on the light-emitting element 22.

[0043] The second surface is provided with a plurality of second grooves 32, and the cross-sectional area of ​​the second grooves 32 gradually decreases along the depth direction of the second grooves 32. The density of the second grooves 32 on the second surface is greater than the density of the first grooves 31 on the first surface.

[0044] In the light homogenizing structure plate 30 of the embodiment of the present disclosure, the cross-sectional area of ​​the first groove 31 gradually decreases along the depth direction of the first groove 31, so that the side wall of the first groove 31 is in a conical plane or curved surface. Figure 1 As shown, the light emitting element 22 is located in the first groove 31, and the light emitted by the light emitting element 22 can enter the structural plate body 33 through the side wall of the first groove 31, and the light emitted by the light emitting element 22 enters the structural plate body 33 along the normal direction of each point on the side wall of the first groove 31, thereby expanding the light emitting angle of the light emitting element 22; since the cross-sectional area of ​​the first groove 31 gradually decreases along the depth direction of the first groove 31, the light entering the structural plate body 33 through the side wall of the first groove 31 is divergent, and diverges to the surroundings with the first groove 31 as the center, so that the first groove 31 becomes the center of the light source. Therefore, by setting the first groove 31, the light emitting area corresponding to the light emitting element 22 is expanded, and the direction of light divergence is expanded, which is beneficial to improving the uniform light effect of the uniform light structural plate 30.

[0045] At the same time, the second surface is provided with a plurality of second grooves 32, and the cross-sectional area of ​​the second grooves 32 gradually decreases along the depth direction of the second grooves 32, that is, the sidewalls of the second grooves 32 are tapered planes or curved surfaces. The density of the second grooves 32 is greater than that of the first grooves 31. Therefore, when the light entering the structural plate body 33 through the sidewalls of the first grooves 31 is transmitted to the sidewalls of the second grooves 32, Figure 1 As shown, part of the light will be reflected by the side wall of the second groove 32 and then return to the structural plate body 33 and be reflected multiple times in the structural plate body 33, which extends the transmission path of the light in the structural plate body 33 and improves the uniform light effect of the uniform light structural plate 30.

[0046] For example, Figure 1When the light a1 is transmitted to the side wall of the second groove 32, the light a1 is returned to the structural plate body 33 under the action of the side wall of the second groove 32 (the light a1 is reflected, refracted, and reflected by multiple side walls of the second groove 32), and the reflected light a2 of the light a1 is reflected again by the reflective layer on the surface of the light-emitting substrate 20 and continues to be transmitted in the structural plate body 33, which extends the transmission path of the light a in the structural plate body 33 and improves the uniform light effect of the uniform light structural plate 30.

[0047] The density of the second grooves 32 is the number of the second grooves 32 per unit area, and the density of the first grooves 31 is the number of the first grooves 31 per unit area. The density of the second grooves 32 is set to be greater than the density of the first grooves 31, so that a light-emitting area corresponding to a light-emitting element 22 has a first groove 31 and multiple second grooves 32, and the side walls of the multiple second grooves 32 can better reflect the light in the structural plate body 33, extend the transmission path of the light in the structural plate body 33, and improve the uniform light effect. The greater the density of the second grooves 32, the better the uniform light effect of the uniform light structural plate 30.

[0048] Figure 3 FIG. 1 is a schematic longitudinal cross-sectional view of a first groove in one embodiment. Figure 3 As shown, the first groove 31 may be a tapered groove. That is, the longitudinal cross section of the first groove 31 is a triangle. In another embodiment, the longitudinal cross section of the first groove 31 may be a regular trapezoid.

[0049] In one embodiment, Figure 2 As shown, the first groove 31 can be a conical curved groove. That is, the longitudinal section of the first groove 31 is curved. It can be understood that when the light emitting surface is a curved surface, the emitted light is along the normal direction of each point on the curved surface. The first groove 31 is set as a conical curved groove, and the light emitted by the light emitting element 22 can enter the structural plate body 33 along the normal direction of each point on the curved surface, so that the light entering the structural plate body 33 is more divergent, which is conducive to further improving the uniform light effect.

[0050] For example, the longitudinal cross section of the first groove 31 may be in the shape of a parabola, an ellipse or an arc. Such a structure can reduce the difficulty of manufacturing the first groove 31 .

[0051] In one embodiment, Figure 2As shown, the size D1 of the opening diameter of the first groove 31 may range from 0.5 mm to 0.7 mm. For example, the size D1 of the opening diameter of the first groove 31 may be 0.5 mm, 0.6 mm or 0.7 mm. The depth H1 of the first groove 31 may range from 0.6 mm to 1.0 mm, for example, the depth H1 of the first groove 31 may be 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1.0 mm.

[0052] Such a first groove 31, by setting the opening diameter D1 and the depth H1 of the first groove 31, can make the side wall of the first groove 31 have a suitable distance from the light-emitting element 22, which can not only make the light-emitting element 22 completely located in the first groove 31, but also ensure the intensity of the light received by the side wall of the first groove 31.

[0053] Exemplarily, the first grooves 31 may correspond to the light emitting elements 22 on the light emitting substrate 20 one by one, and the interval between adjacent first grooves 31 may be the same as the interval between adjacent light emitting elements 22 .

[0054] like Figure 2 As shown, the second groove 32 is a conical groove. That is, the longitudinal section of the second groove 32 is a triangle. The second groove 32 can be a conical groove such as an inverted triangular pyramid or an inverted quadrangular pyramid.

[0055] Figure 4 FIG. 3 is a schematic diagram of a longitudinal cross section of the second groove in another embodiment. The longitudinal cross section of the second groove 32 may be an inverted trapezoid, such as Figure 4 shown.

[0056] In one embodiment, the second groove 32 may be a conical curved groove. That is, the longitudinal section of the second groove 32 is curved, for example, the longitudinal section of the second groove 32 may be a parabola, an ellipse or an arc.

[0057] In one embodiment, the angle θ between the side wall of the second groove 32 connected to the opening edge of the second groove 32 and the plane where the second surface is located is 30° to 40°. For example, the angle θ may be 30°, 35° or 40°. Figure 2 , Figure 4 The angle θ is shown in FIG. When the angle θ is set to 30° to 40°, the light from the light emitting element 22 entering the structural plate body 33 through the first groove 31 is easily reflected back into the structural plate body 33 by the side wall of the second groove 32 when it is transmitted to the side wall of the second groove 32, thereby increasing the amount of light reflected back into the structural plate body 33 and improving the uniform light brightness.

[0058] like Figure 2As shown, the depth H2 of the second groove 32 may be in the range of 0.05 mm to 0.15 mm. For example, the depth H2 of the second groove 32 may be 0.05 mm, 0.1 mm or 0.15 mm.

[0059] Figure 5A is a schematic plan view of the second surface of the light homogenizing structure plate in one embodiment, Figure 5B FIG. 1 is a schematic plan view of the second surface of the light homogenizing structure plate in another embodiment. Figure 2 , Figure 5A and Figure 5B As shown, the opening edges of the plurality of second grooves 32 are in contact with each other. When the opening edge of the second groove 32 is a polygon, such as a quadrilateral, the opening edges of adjacent second grooves 32 may share a common edge. When the opening edge of the second groove 32 is a curved shape, the opening edges of adjacent second grooves 32 may be tangent. In short, the opening edges of the plurality of second grooves 32 are in contact with each other, so that more second grooves 32 can be provided, thereby improving the reflection effect of the second grooves 32 on the light in the structural plate body 33, and further improving the uniform light effect.

[0060] In one embodiment, the second groove 32 may be a strip-shaped groove, such as Figure 5A shown.

[0061] In one embodiment, the plurality of second grooves 32 may be arranged in an array, such as Figure 5B shown.

[0062] The thickness H of the light-homogenizing structure plate 30 (ie, the distance between the first surface and the second surface) is 2.5 mm to 3.5 mm. For example, the thickness H of the light-homogenizing structure plate 30 may be 2.5 mm, 3 mm, or 3.5 mm.

[0063] In one embodiment, a uniform light pattern is provided on the first surface of the structural plate body 33 in the area between the first grooves 31. The uniform light pattern may include micro-pits or micro-protrusions. When the light reflected back by the sidewall of the second groove 32 is transmitted to the uniform light pattern on the first surface of the structural plate body 33, the uniform light pattern may disperse the light, further improving the uniform light effect.

[0064] The material of the light-homogenizing structure plate 30 is a transparent material. The material of the light-homogenizing structure plate 30 may be a transparent resin material, such as polystyrene (PS) or acrylic (PMMA) material. The refractive index of the light-homogenizing structure plate 30 may be 1.2 to 1.8. For example, the refractive index of the light-homogenizing structure plate 30 may be 1.2, 1.4, 1.49, 1.5, 1.7 or 1.8.

[0065] The light-homogenizing structure plate 30 of the embodiment of the present disclosure can be manufactured by injection molding. For example, a mold of the light-homogenizing structure plate 30 is manufactured; the light-homogenizing structure plate 30 is manufactured by using the mold and the injection molding process. The light-homogenizing structure plate 30 can also be manufactured by other processes such as mechanical processing.

[0066] The present disclosure also provides a light-emitting module, such as Figure 1 As shown, the light-emitting module includes a light-emitting substrate 20, and the light-emitting substrate 20 includes a base substrate 21 and a plurality of light-emitting elements 22 arranged on the base substrate 21. The light-emitting module also includes a light-homogenizing structure plate 30 in the embodiment of the present disclosure. The first surface of the light-homogenizing structure plate 30 is in contact with the side of the base substrate 21 facing the light-emitting element 22. The plurality of first grooves 31 of the light-homogenizing structure plate 30 correspond one-to-one to the plurality of light-emitting elements 22, and the orthographic projection of the light-emitting element 22 on the base substrate 21 is located within the orthographic projection of the first groove 31 on the base substrate 21.

[0067] Exemplarily, the first surface of the light homogenizing structure plate 30 is bonded to the side of the base substrate 21 facing the light emitting element 22 by optical adhesive.

[0068] Exemplarily, a reflective layer is also provided on the side of the light-emitting substrate 20 facing the light-emitting element 22, so that when the first surface of the light-evening structure plate 30 is bonded to the side of the light-evening substrate 20 facing the light-emitting element 22, the reflective layer can reflect the light transmitted to the second surface of the light-evening structure plate 30 back to the light-evening structure plate 30, which is beneficial to improve the light-evening effect.

[0069] Figure 6 FIG. 1 is a schematic diagram of the preparation process of a light-emitting module according to an embodiment of the present disclosure. Figure 6 As shown, the preparation process of the light-emitting module may include: preparing a light-uniform structure plate 30; coating optical glue on the first surface of the light-uniform structure plate 30; optically aligning the light-uniform structure plate 30 with the light-emitting substrate 20 so that the orthographic projection of the light-emitting element 22 on the base substrate 21 is located within the orthographic projection of the first groove 31 on the base substrate 21; and a bonding process, i.e. bonding the light-uniform structure plate 30 to the side of the light-emitting substrate 20 facing the light-emitting element 22 through the optical glue.

[0070] like Figure 1 As shown, the light-emitting module may further include an optical film material 40, which is located on the second surface of the light-homogenizing structure plate 30, that is, the optical film material 40 is located on the side of the light-homogenizing structure plate 30 away from the light-emitting substrate 20. The optical film material 40 may include a lower diffuser, a lower prism sheet, an upper prism sheet, and an upper diffuser. The optical film material 40 may also include an incremental film.

[0071] Figure 7 A schematic diagram of the structure of a display device in another embodiment of the present disclosure, Figure 7The positional relationship of each component in the display device is shown in FIG. Figure 7 As shown, the display device includes a light-emitting module of the embodiment of the present disclosure and a display panel 50 located on the light-emitting side of the light-emitting module, and the display panel 50 may be a liquid crystal display panel. The light-emitting module may also include a back plate 10, and the side of the light-emitting substrate 20 away from the light-emitting element 22 is attached to the back plate 10 by a double-sided adhesive 80. The display panel 50 is located on the side of the optical film material 40 away from the uniform light structure plate 30. A preset air gap (AirGap) is set between the display panel 50 and the optical film material 40.

[0072] The light emitting module may further include a structure frame 60, which is disposed around the back plate 10. The structure frame 60 and the back plate 10 may be an integral structure, or may be a separate structure.

[0073] like Figure 7 As shown, the display device may further include an outer plastic frame 91 and a support member 92, and the material of the support member 92 may be foam. The outer plastic frame 91 is overlapped on the upper end of the structural frame 60, the support member 92 is located at the upper end of the outer plastic frame 91, and the display panel 50 is located on the support member 92, so that the display panel 50 is supported on the light-emitting side of the light-emitting module.

[0074] Figure 8 is a schematic diagram of the structure of a display device in the related art, Fig. 9 for Figure 8 A local schematic diagram of the Figure 8 As shown, in the related art, the display device includes a back plate 10, a light emitting substrate 20, a diffusion plate 70, an optical film material 40 and a display panel 50 from bottom to top. Fig. 9 As shown, the light emitting substrate 20 includes a base substrate 21, a plurality of light emitting elements 22 are arranged on one side of the base substrate 21, and the light emitting elements 22 are covered with a protective glue 23. The light emitting substrate 20 also includes a support column 24 arranged on the side of the base substrate 21 facing the light emitting elements 22.

[0075] like Figure 7 and Figure 8 As shown, the side of the light-emitting substrate 20 that is away from the light-emitting element 22 is attached to the back plate 10 by a double-sided adhesive 80. Figure 8 As shown, there is a light mixing distance OD between the diffusion plate and the light emitting substrate 20. Figure 7 and Figure 8 As shown, a preset air gap is provided between the display panel 50 and the optical film material 40. Table 1 lists the air gaps when applied to 34-inch 1K partition products. That is, Figure 7 The display device shown is Figure 8 When the uniform light effect of the display device shown is equivalent, Figure 7 or Figure 8The thickness values ​​of various parts in the display device are shown.

[0076] Table 1 Figure 8 The backlight module shown is Figure 7 The thickness of the light emitting module shown

[0077]

[0078]

[0079] like Figure 8 As shown, the display device may further include an outer plastic frame 91 and a support member 92, and the material of the support member 92 may be foam. The outer plastic frame 91 is overlapped on the upper end of the structural frame 60, the support member 92 is located at the upper end of the outer plastic frame 91, and the display panel 50 is located on the support member 92, so that the display panel 50 is supported on the light-emitting side of the light-emitting module.

[0080] like Figure 8 As shown, the display device further includes an inner plastic frame 93 , which is supported between the back plate 10 and the diffuser plate 70 , so that a light mixing distance OD is provided between the diffuser plate and the light emitting substrate 20 .

[0081] When applied to 34-inch 1K partition products, Figure 7 In the display device shown, the thickness of the back panel 10 is approximately 1.5 mm, the thickness of the double-sided tape is approximately 0.2 mm, the thickness of the light-emitting substrate 20 is approximately 0.7 mm, the thickness of the light-uniform structure plate 30 is approximately 3 mm, the thickness of the optical film material 40 is approximately 0.72 mm, the preset air gap is approximately 2.56 mm, the thickness of the display panel 50 is approximately 1.32 mm, and the total thickness M1 of the display device is approximately 10 mm.

[0082] When applied to 34-inch 1K partition products, Figure 8 In the display device shown, the thickness of the back panel 10 is approximately 1.5 mm, the thickness of the double-sided tape is approximately 0.2 mm, the thickness of the light-emitting substrate 20 is approximately 0.7 mm, the mixing distance OD is approximately 5.3 mm, the thickness of the diffuser plate is approximately 3 mm, the thickness of the optical film material 40 is approximately 0.72 mm, the preset air gap is approximately 2.26 mm, the thickness of the display panel 50 is approximately 1.32 mm, and the total thickness M2 of the display device is approximately 15 mm.

[0083] By comparison, it can be seen that the thickness of the display device using the light-emitting module of the embodiment of the present disclosure is relatively thicker than that of the related art. Figure 8 The thickness of the display device shown is reduced by about 5 mm. That is to say, the light-emitting module of the embodiment of the present disclosure is used as the backlight module of the liquid crystal display device, which is more conducive to realizing ultra-thin products and improving product competitiveness because the thickness of the backlight module is thinner.

[0084] The inventor of this application uses simulation software to Figure 7 The display device and Figure 8 The light emitting effect of the display device shown is simulated and compared. Table 2 shows the various parameters used in the simulation process.

[0085] Table 2 Parameters used in optical effect simulation

[0086]

[0087] As shown in Table 2, the size of the LED chip on the light-emitting substrate 20 is 0.3*0.3*0.1; the light type of the LED chip is Lambertian, and the light-emitting angle is 120°; the number of LED chips on the light-emitting substrate 20 is 9, and the arrangement of the LED chips is 3 rows and 3 columns; the spacing between two adjacent LED chips is 8.5mm; the thickness of the uniform light structure plate 30 is 3mm; the second groove 32 is a quadrangular pyramid groove, the depth H2 of the second groove 32 is 0.1mm, and the angle θ is 35°; the longitudinal cross-section of the first groove 31 is a parabola shape; the opening diameter size D1 of the second groove 32 is 0.6mm, and the depth H1 of the second groove 32 is 0.8mm; the optical film material 40 includes a lower diffuser, a lower prism sheet, an upper prism sheet, an upper diffuser and a brightness enhancement film.

[0088] Fig.10 A schematic diagram of light transmission when simulating the light-emitting module of the embodiment of the present disclosure is shown in FIG. Fig.10 It can be seen that after the light in the light-uniform structural plate 30 is transmitted to the side wall of the second groove 32, it is reflected back into the structural plate body 33 by the side wall of the second groove 32, and is reflected back into the structural plate body 33 again when it is transmitted to the first surface of the light-uniform structural plate 30, thereby extending the transmission path of the light in the light-uniform structural plate 30 and improving the cloud light effect of the light-uniform structural plate 30.

[0089] Fig.11 for Figure 7 The schematic diagram of the light output screen of the display device shown is as follows, Fig.12 for Figure 8 The schematic diagram of the light output image of the display device shown in FIG. Figure 8 The value of the mixing distance OD and the preset air gap makes Figure 8 The thickness of the display device shown is Figure 7 The thickness of the display devices shown is the same. Fig.11 The display device corresponding to the light output picture shown is Fig.12 The thickness values ​​of the display devices corresponding to the light output images shown are the same.

[0090] like Fig.11 and Fig.12As shown, a coordinate system XY is established with the center of the light-emitting substrate 20, the horizontal direction is X, the vertical direction is Y, the illumination unit is lux, and the color represents the illumination value. The closer the colors are, the more uniform the picture is.

[0091] from Fig.11 It can be seen that Figure 7 The color of the central area of ​​the light output image of the display device is very close, the uniformity of the central area is greater than 98%, the light output image of the light emitting module is relatively uniform, and the uniform light effect is relatively good. In this field, when the uniformity of the image reaches 98%, it is considered that the image meets the display requirements.

[0092] from Fig.12 It can be seen that Figure 8 The display device shown is Figure 7 In the case of the same thickness of the display device shown, Figure 8 In the light-emitting image of the display device shown, a circular luminous area is generated with each LED chip as the center. The illuminance values ​​between the circular luminous areas are quite different from the illuminance values ​​of the circular luminous areas. The uniformity of the central area of ​​the entire light-emitting image is about 60%, which is lower than 90%. Fig.11 The light-emitting screen, Fig.12 The uniformity of the light output image is poor, and the uniform light effect is poor, which cannot meet the display requirements.

[0093] pass Figure 7 , Figure 8 As can be seen from Table 2, the light-homogenizing structure plate in the embodiment of the present disclosure has a better light-homogenizing effect. In the light-emitting module of the embodiment of the present disclosure, the light-homogenizing structure plate is bonded to the light-emitting substrate, thereby obtaining a very good light-homogenizing effect and improving the added value of the light-emitting substrate. When the light-emitting module is used as a backlight module of a display device, a diffusion plate is no longer required, thereby reducing the difficulty of assembly and further reducing the thickness of the module.

[0094] For a display device using the light-emitting module of the embodiment of the present disclosure and a display device using the backlight module in the related art, when the light-homogenizing effects of the two are equivalent, the display device of the embodiment of the present disclosure is thinner; when the thickness of the two is the same, the light-homogenizing effect of the display device of the embodiment of the present disclosure is better; when the thickness of the two is the same and the light-homogenizing effects are equivalent, the light-emitting substrate in the light-emitting module of the embodiment of the present disclosure can use a smaller number of light-emitting elements, thereby effectively reducing the cost of the light-emitting substrate, and reducing the cost of the light-emitting module and the display device. In addition, in the light-emitting module of the embodiment of the present disclosure, the light-emitting element is located in the first groove of the light-homogenizing structure plate, so that the light-emitting element of the light-emitting substrate no longer needs to be protected by protective glue, which reduces the production process of the light-emitting substrate, further reduces the cost of the light-emitting substrate, and reduces the cost of the light-emitting module.

[0095] The light-emitting module in the embodiment of the present disclosure can be assembled in a display device as a backlight module, and can also be used as a light source in a lighting product.

[0096] Based on the inventive concept of the aforementioned embodiment, the embodiment of the present disclosure further provides a display device, which includes the light-emitting module in any embodiment of the present disclosure, and also includes a display panel, which is located on the side of the light-homogenizing structure plate in the light-emitting module away from the light-emitting substrate. The display panel can be a liquid crystal display panel, and the light-emitting module serves as a backlight in the display device.

[0097] The display device of the embodiment of the present disclosure, after adopting the light-emitting module of the embodiment of the present disclosure as the backlight module, can not only obtain a better picture effect, but also be thinner, which is conducive to the realization of an ultra-thin product.

[0098] The display device may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, or the like.

[0099] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0100] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0101] In the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0102] In the present disclosure, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being “above”, “above”, and “above” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0103] The disclosure above provides many different embodiments or examples to implement different structures of the present disclosure. In order to simplify the present disclosure, the components and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present disclosure. In addition, the present disclosure can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0104] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A light homogenizing structure plate, characterized in that: Used to cooperate with the light-emitting substrate, the light-evening structural plate includes a structural plate body, the structural plate body includes a first surface and a second surface arranged oppositely, the light-emitting substrate includes a base substrate and a plurality of light-emitting elements arranged on the base substrate, and the first surface of the light-evening structural plate is used to fit with a side of the base substrate facing the light-emitting elements; The first surface is provided with a plurality of first grooves, the cross-sectional area of ​​the first grooves gradually decreases along the depth direction of the first grooves, and when the first surface is attached to the light-emitting substrate, the orthographic projection of the light-emitting element on the substrate is located within the orthographic projection of the first grooves on the substrate; The second surface is provided with a plurality of second grooves, the cross-sectional areas of the second grooves gradually decrease along the depth direction of the second grooves, and the density of the second grooves is greater than the density of the first grooves.

2. The light homogenizing structure plate according to claim 1, characterized in that: The first groove is a conical curved groove.

3. The light homogenizing structure plate according to claim 2, characterized in that: The longitudinal cross section of the first groove is in the shape of a parabola, an ellipse or an arc.

4. The light homogenizing structure plate according to claim 1, characterized in that: The opening diameter of the first groove ranges from 0.5 mm to 0.7 mm; and / or the depth of the first groove ranges from 0.6 mm to 1.0 mm.

5. The light homogenizing structure plate according to claim 1, characterized in that: The second groove is a conical groove or a conical curved groove.

6. The light homogenizing structure plate according to claim 1, characterized in that: An angle between a side wall of the second groove connected to an opening edge of the second groove and a plane where the second surface is located is 30° to 40°.

7. The light homogenizing structure plate according to claim 1, characterized in that: The depth of the second groove ranges from 0.05 mm to 0.15 mm.

8. The light homogenizing structure plate according to claim 1, characterized in that: The opening edges of the plurality of second grooves are abutted against each other.

9. The light homogenizing structure plate according to claim 1, characterized in that: The distance between the first surface and the second surface of the light homogenizing structure plate is 2.5 mm to 3.5 mm.

10. A light emitting module, characterized in that: include: A light-emitting substrate, comprising a base substrate and a plurality of light-emitting elements arranged on the base substrate; The light-evening structure plate according to any one of claims 1 to 9, wherein the first surface of the light-evening structure plate is bonded to the side of the base substrate facing the light-emitting element, the multiple first grooves of the light-evening structure plate correspond one-to-one to the multiple light-emitting elements, and the orthographic projection of the light-emitting element on the base substrate is located within the orthographic projection of the first groove on the base substrate.

11. The light emitting module according to claim 10, characterized in that: It also includes an optical film material, which is located on the second surface of the light uniforming structure plate.

12. A display device, characterized in that: The light-emitting module comprises the light-emitting module according to claim 10 or 11, and further comprises a display panel, wherein the display panel is located on a side of the light-homogenizing structure plate away from the light-emitting substrate.

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