Display device

Abstract

The utility model relates to the technical field of display, and provides a display device which can comprise a display panel, a back plate and a light bar, the back plate and the display panel are oppositely arranged, the back plate comprises an inner surface facing the display panel, the inner surface comprises a middle area, a first area and a second area, the middle area is located between the first area and the second area, and the light bar is located between the first area and the second area. One side edge of the middle area is connected with the first area, and the other side edge is connected with the second area; the light bar is arranged in the middle area and extends in the direction from the first area to the second area. Wherein the first area is provided with a diffuse reflection structure, and / or the second area is provided with a diffuse reflection structure. According to the display device provided by the embodiment, the brightness displayed by the display device can be more uniform, and the use experience of a user is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display device. Background Art

[0002] At present, with the development of electronic technology and the increasing requirements of consumers for TV size, picture quality, etc., LCD TVs have become the mainstream development trend in the industry.

[0003] The single light bar (onebar) backlight design has been used in LCD modules. For onebar product models, since there is only one light bar in the center of the cavity and the divergence angle of the lens is limited, the light in the cavity is mainly concentrated in the middle part and the left and right edges. Combined with the curved edge shape of the back panel, the bright edges on the left and right sides are particularly serious, affecting the display effect of the display device. Utility Model Content

[0004] In order to solve the above technical problem or at least partially solve the above technical problem, the present disclosure provides a display device.

[0005] The present application discloses a display device, which may include: a display panel, a back panel and a light bar, wherein the back panel is arranged opposite to the display panel, the back panel includes an inner surface facing the display panel, the inner surface includes a middle area, a first area and a second area, the middle area is located between the first area and the second area, one side edge of the middle area is connected to the first area, and the other side edge is connected to the second area; the light bar is arranged in the middle area, and the light bar extends from the first area to the second area; wherein the first area is provided with a diffuse reflection structure, and / or the second area is provided with a diffuse reflection structure.

[0006] It should be noted that when an incident light beam hits the diffuse reflection structure, the surface of the diffuse reflection structure will reflect the light in all directions, causing the reflected light to be reflected irregularly in different directions, thereby reducing the phenomenon of light concentration.

[0007] In this way, by setting diffuse reflection structures in the first area and the second area, the mirror reflection of the first area and the second area can be reduced, and the light concentration phenomenon in the first area and the second area can be reduced, so that the brightness displayed by the display device is more uniform, and the user experience is improved.

[0008] In some embodiments of the present application, the first area includes a first sub-area, the orthographic projection of the light bar in the first area is located in the first sub-area, and the diffuse reflection structure covers the first sub-area.

[0009] In some embodiments of the present application, the second area includes a second sub-area, the orthographic projection of the light bar in the second area is located in the second sub-area, and the diffuse reflection structure covers the second sub-area.

[0010] In some embodiments of the present application, the diffuse reflection structure includes a first substructure and a second substructure, the second substructure is located on a side of the first substructure away from the light bar, the diffuse reflection coefficient of the first substructure is a first diffuse reflection coefficient, the diffuse reflection coefficient of the second substructure is a second diffuse reflection coefficient, and the first diffuse reflection coefficient is less than the second diffuse reflection coefficient.

[0011] In some embodiments of the present application, the diffuse reflection structure includes a plurality of diffuse reflection protrusions, which protrude from the inner surface of the back plate; and / or, the diffuse reflection includes a plurality of diffuse reflection grooves, which are recessed from the inner surface of the back plate toward the outer surface of the back plate.

[0012] In some embodiments of the present application, the diffuse reflection structure covers the first area, and / or the diffuse reflection structure covers the second area.

[0013] In some embodiments of the present application, the display device further includes: a reflective plate, which is stacked with the back plate and arranged on one side of the inner surface of the back plate, and the reflective plate is provided with a hollow structure, which is arranged opposite to the diffuse reflection structure.

[0014] In some embodiments of the present application, the hollow structure includes a plurality of through holes penetrating the reflective plate, and the light reflected by the diffuse reflection structure is emitted through the through holes.

[0015] In some embodiments of the present application, the diffuse reflection structure is integrally formed with the back plate.

[0016] In some embodiments of the present application, the display device further includes: a light absorbing coating, and at least a portion of the surface of the diffuse reflection structure is coated with the light absorbing coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A schematic diagram of a display device provided in some embodiments of the present application;

[0020] Figure 2 for Figure 1 A cross-sectional view of the display device shown in ;

[0021] Figure 3 for Figure 2A schematic diagram of the backplane shown in ;

[0022] Figure 4 Schematic diagram of a backplane provided for other embodiments of the present application;

[0023] Figure 5 for Figure 4 Schematic diagram of the diffuse reflection structure shown in;

[0024] Figure 6 Schematic diagram of diffuse reflection structure provided for other embodiments of the present application;

[0025] Figure 7 Schematic diagram of a backplane provided for other embodiments of the present application;

[0026] Figure 8 Schematic diagram of a backplane provided for other embodiments of the present application;

[0027] Fig. 9 Schematic diagram of a backplane provided for other embodiments of the present application;

[0028] Fig.10 Schematic diagram of a display device provided in some other embodiments of the present application.

[0029] Reference numerals:

[0030] 100. display device; 101. mounting cavity;

[0031] 110. Display panel;

[0032] 120, back plate; 1201, inner surface; 1202, middle plate; 1203, first side plate; 1204, second side plate; 121, middle area; 122, first area; 1221, first sub-area; 1222, first upper area; 1223, first lower area; 123, second area; 1231, second sub-area; 1232, second upper area; 1233, second lower area;

[0033] 130, light bar; 131, light board; 132, light beads;

[0034] 140. reflector; 141. through hole;

[0035] 150, diffuser plate;

[0036] 160. Diffuse reflection structure. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0038] First, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the scope of protection of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0039] Secondly, it should be noted that in the description of the present application, terms such as "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present application.

[0040] 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 the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0041] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 or an electrical connection; it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0043] The present disclosure provides a display device 100, which can be any device that displays images, whether in motion (e.g., video) or fixed (e.g., still images), and whether text or images. More specifically, it is expected that the embodiments can be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal data assistants, handheld or portable computers, global positioning system receivers / navigators, cameras, video players, cameras, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, car displays (e.g., odometer displays, etc.), navigators, cockpit controllers and / or displays, displays of camera views (e.g., displays of rear-view cameras in vehicles), electronic photos, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., displays of images of a piece of jewelry), etc. Exemplarily, the display device 100 can be a television (e.g., an LCD TV, etc.).

[0044] Exemplarily, the size of the display device 100 is any one of 32 inches, 40 inches, 45 inches, 50 inches, 55 inches, 60 inches, 65 inches, 70 inches, 75 inches, 80 inches, 85 inches, 86 inches, 90 inches, 95 inches, 98 inches, 100 inches, 110 inches and 120 inches. The specific size can be selected according to actual conditions, and the present disclosure does not make any specific limitation on this.

[0045] In some embodiments of this application, please refer to Figure 1 The display device 100 may include a display panel 110, and the display panel 110 has a display side and a non-display side opposite to each other. It should be noted that the display side refers to a side of the display panel 110 for displaying images, and the non-display side refers to the other side opposite to the display side.

[0046] Exemplarily, the display panel 110 may be a liquid crystal display panel 110 (LCD). It is understood that a plurality of sub-pixels are usually distributed in the liquid crystal display panel 110, and when light shines on the sub-pixels, the sub-pixels can emit light to display an image.

[0047] Among them, the sub-pixel is the smallest imaging unit of the display panel 110, and a plurality of adjacent sub-pixels emitting different light rays can constitute a pixel. For example, adjacent red (red, R) sub-pixels, green (green, G) sub-pixels, and blue (blue, B) sub-pixels constitute a pixel. In this case, the purpose of adjusting the pixel display color can be achieved by adjusting the proportion of R, G, and B light rays in different pixels.

[0048] In some embodiments of this application, please refer to Figure 2 and Figure 3 The display device 100 may further include a back plate 120, which is disposed on the non-display side of the display panel 110 and forms a mounting cavity 101 with the display panel 110. The back plate 120 can provide support for the display panel 110.

[0049] The back plate 120 includes an inner surface 1201 facing the display panel 110, and the inner surface 1201 may include a middle area 121, a first area 122, and a second area 123. The middle area 121 is located between the first area 122 and the second area 123. One side edge of the middle area 121 is connected to the first area 122, and the other side edge is connected to the second area 123. Specifically, the back plate 120 may include a middle plate 1202, a first side plate 1203, and a second side plate 1204. The middle plate 1202 has a surface facing the display panel 110. The middle area 121 is a first area 122, the surface of the first side panel 1203 facing the display panel 110 is a first area 122, the surface of the second side panel 1204 facing the display panel 110 is a second area 123, in the direction away from the second side panel 1204, the first side panel 1203 is inclined toward the display panel 110; in the direction away from the first side panel 1203, the second side panel 1204 is inclined toward the display panel 110, the first side panel 1203, the middle panel 1202 and the second side panel 1204 together form a back panel 120 with a curved edge shape.

[0050] In some embodiments of the present application, the display device 100 may further include a light bar 130, and the display device 100 only provides a light source through a single light bar 130, that is, a single light bar (one bar) display device 100, the light bar 130 is located in the installation cavity 101, and is arranged in the middle area 121, specifically, it can be bonded to the middle area 121, or clamped in the middle area 121. The light bar 130 extends in the direction from the first area 122 to the second area 123. The light bar 130 may include a light board 131 and a plurality of lamp beads 132, and the plurality of lamp beads 132 are evenly spaced in the extension direction of the light bar 130. The lamp beads 132 are point light sources, and the light bar 130 formed by the plurality of lamp beads 132 is a line light source.

[0051] Please refer to Figure 2 and Figure 3The display device 100 may further include a reflective plate 140 and a diffuser plate 150, wherein the reflective plate 140 and the diffuser plate 150 are located between the display panel 110 and the back panel 120, the reflective plate 140 is fixed on the inner surface 1201 of the diffuser plate 150, and the diffuser plate 150 is located between the display panel 110 and the reflective plate 140. Thus, by setting the reflective plate 140 and the diffuser plate 150, the linear light source of the light bar 130 is reflected and diffused to form a surface light source to irradiate the display panel 110.

[0052] However, for the single light bar 130 display device 100, since only one light bar 130 is disposed in the mounting cavity 101, the light bar 130 is generally disposed in the middle position of the middle area 121, resulting in bright edges in the first area 122 and the second area 123 on the left and right sides.

[0053] To solve the above technical problems, please refer to Figure 4 The present application provides a display device 100 , in which a first region 122 of the display device 100 is provided with a diffuse reflection structure 160 , or a second region 123 is provided with a diffuse reflection structure 160 , or both the first region 122 and the second region 123 are provided with a diffuse reflection structure 160 .

[0054] It should be noted that when an incident light beam hits the diffuse reflection structure 160, the surface of the diffuse reflection structure will reflect the light in all directions, causing the reflected light to be irregularly reflected in different directions, thereby reducing the phenomenon of light concentration. Specifically, the surface of the diffuse reflection structure 160 is formed into a rough surface.

[0055] In this way, by setting the diffuse reflection structure 160 in the first area 122, the mirror reflection of the first area 122 can be reduced, and the light concentration phenomenon in the first area 122 can be reduced; by setting the diffuse reflection structure 160 in the second area 123, the mirror reflection of the second area 123 can be reduced, and the light concentration phenomenon in the second area 123 can be reduced, thereby making the brightness displayed by the display device 100 more uniform and improving the user experience.

[0056] The diffuse reflection structure 160 may be formed by etching the first region 122 , and the diffuse reflection structure 160 may also be formed as a diffuse reflection layer, and the diffuse reflection layer is attached to the first region 122 .

[0057] In the specific product production process, the material of the back plate 120 may include SGCC and SECC. SGCC is a material standard for hot-dip galvanized steel sheets. Its full name is "Standard for Galvanized Steel Coils", which is the standard for hot-dip galvanized steel coils. SECC is a stamping material, which is a zinc layer plated on the surface of a cold-rolled sheet. It is rust-proof and corrosion-resistant. The price is relatively high. Symbols: S-Steel, E-Electrodeposition, C-Cold, and the fourth digit C-common.

[0058] Among them, the reflectivity of SGCC material and SECC material are different. The reflectivity of SGCC is higher than the reflectivity of the reflective sheet, which manifests as mirror reflection. The light reflected from the first area 122 and the second area 123 forms a bright spot that is more obvious. The present application sets a diffuse reflection structure 160 in the first area 122 and the second area 123, which can avoid the occurrence of mirror reflection and thereby improve the occurrence of the bright spot. At the same time, the compatibility of the backplane 120 is improved. By setting a diffuse reflection structure 160 in the first area 122 and the second area 123, the requirements of the backplane 120 of materials with different reflectivity can be met.

[0059] Generally, the surface of a SGCC substrate is smooth, and when light is irradiated to the substrate, mirror reflection occurs. The direction of the emitted light is highly consistent, and light accumulation is serious, resulting in subjective white masses. Non-uniform etching (uneven surface) is performed on the SGCC substrate to form a diffuse reflection structure 160, so that the light is diffusely reflected, the direction of the emitted light is dispersed, and light accumulation in the same direction is reduced.

[0060] The bidirectional reflectance distribution function (BRFD) can be used to evaluate the effect of substrate etching on light accumulation and weakening. Bidirectional reflectance distribution function: given an incident angle and an observation angle, it can give the intensity coefficient that determines the final angle of light emitted to the observer, f BRFD The larger it is, the stronger the corresponding observed light is.

[0061]

[0062]

[0063] Among them, C diff Represents the diffuse reflectance, with a value range of 0-1, where 0 represents complete absorption and 1 represents complete reflection;

[0064] C spec represents the intensity of highlights and is expressed as a constant in the formula;

[0065] D is the normal distribution function, which represents the influence of the surface's subtle unevenness on reflection; the main influencing parameter is the half-angle vector m, which is the intermediate vector between the viewing angle vector V and the light vector L;

[0066] By setting the diffuse reflection structure 160, on the one hand, the consistency of the light reflection direction is disrupted to avoid local light accumulation; on the other hand, the reflection angle β is enlarged through diffuse reflection, thereby enlarging the angle θ between the half-angle vector of the light and the normal. The larger the angle θ, the smaller m and D are, the corresponding light spot is more dispersed, and the highlight is weaker.

[0067] Correspondingly, the smaller the D value is, the smaller the f BRFD The smaller it is, the weaker the light intensity from the observer's angle, thus solving the problem of subjective bright spots.

[0068] In some embodiments of this application, please refer to Figure 5 and Figure 6 The diffuse reflection structure 160 may be integrally formed with the back plate 120 . Specifically, the diffuse reflection structure 160 may protrude from the inner surface 1201 of the back plate 120 , or the diffuse reflection structure 160 may be recessed in the inner surface 1201 of the back plate 120 .

[0069] Specifically, in some embodiments, the diffuse reflection structure 160 may include a plurality of diffuse reflection protrusions, which protrude from the inner surface of the back plate 120. In other embodiments, the diffuse reflection structure 160 may include a plurality of diffuse reflection grooves, which are recessed from the inner surface of the back plate 120 toward the outer surface of the back plate 120. In other embodiments, the diffuse reflection structure 160 may include both a plurality of diffuse reflection protrusions and a plurality of diffuse reflection grooves.

[0070] In some embodiments of this application, please refer to Figure 7 , the first area 122 may include a first sub-area 1221, the orthographic projection of the light bar 130 in the first area 122 is located in the first sub-area 1221, and the diffuse reflection structure 160 covers the first sub-area 1221. It should be noted that in the first area 122, the distance between the first sub-area 1221 and the light bar 130 is the smallest, so the bright edge phenomenon in the first sub-area 1221 is the most serious. By covering the first sub-area 1221 with the diffuse reflection structure 160, the light concentration in the first sub-area 1221 can be reduced to the greatest extent, thereby improving the bright edge phenomenon in the first sub-area 1221.

[0071] In some embodiments of this application, please continue to refer to Figure 7The first area 122 may include a first upper area 1222 , a first lower area 1223 and a first sub-area 1221 , the first sub-area 1221 is located between the first upper area 1222 and the first lower area 1223 , the extension direction of the light bar 130 passes through the first sub-area 1221 , and the diffuse reflection structure 160 covers the first sub-area 1221 .

[0072] In other embodiments of the present application, please refer to Figure 8 , the diffuse reflection structure 160 is provided in the portion of the first upper region 1222 close to the first sub-region 1221, and the diffuse reflection structure 160 is provided in the portion of the first lower region 1223 close to the first sub-region 1221. It can be understood that the portion of the first upper region 1222 close to the first sub-region 1221 may have a bright edge, and the portion of the first lower region 1223 close to the first sub-region 1221 may have a bright edge. Therefore, by providing the diffuse reflection structure 160 in the portion of the first upper region 1222 close to the first sub-region 1221 and the portion of the first lower region 1223 close to the first sub-region 1221, the bright edge phenomenon of the display device 100 can be further improved.

[0073] In some other embodiments of the present application, the diffuse reflection structure 160 covers the first area 122 .

[0074] Similarly, in some embodiments of the present application, please continue to refer to Figure 7 The second area 123 may include a second sub-area 1231, the orthographic projection of the light bar 130 in the second area 123 is located in the second sub-area 1231, and the diffuse reflection structure 160 covers the second sub-area 1231. It should be noted that in the second area 123, the distance between the second sub-area 1231 and the light bar 130 is the smallest, so the bright edge phenomenon in the second sub-area 1231 is the most serious. By covering the second sub-area 1231 with the diffuse reflection structure 160, the light concentration in the second sub-area 1231 can be reduced to the greatest extent, thereby improving the bright edge phenomenon in the second sub-area 1231.

[0075] In some embodiments of this application, please continue to refer to Figure 8 The second area 123 may include a second upper area 1232 , a second lower area 1233 and a second sub-area 1231 , the second sub-area 1231 is located between the second upper area 1232 and the second lower area 1233 , the extension direction of the light bar 130 passes through the second sub-area 1231 , and the diffuse reflection structure 160 covers the second sub-area 1231 .

[0076] In other embodiments of the present application, please continue to refer to Figure 8The diffuse reflection structure 160 is disposed in the portion of the second upper region 1232 close to the second sub-region 1231, and the diffuse reflection structure 160 is disposed in the portion of the second lower region 1233 close to the second sub-region 1231. It can be understood that the portion of the second upper region 1232 close to the second sub-region 1231 may have a bright edge, and the portion of the second lower region 1233 close to the second sub-region 1231 may have a bright edge. Therefore, by disposing the diffuse reflection structure 160 in the portion of the second upper region 1232 close to the second sub-region 1231 and the portion of the second lower region 1233 close to the second sub-region 1231, the bright edge phenomenon of the display device 100 can be further improved.

[0077] In other embodiments of the present application, please continue to refer to Fig. 9 , the diffuse reflection structure 160 covers the second area 123 .

[0078] In some embodiments of the present application, the diffuse reflection structure 160 includes a first substructure and a second substructure, the second substructure is located on a side of the first substructure away from the light bar 130, the diffuse reflection coefficient of the first substructure is a first diffuse reflection coefficient, the diffuse reflection coefficient of the second substructure is a second diffuse reflection coefficient, and the first diffuse reflection coefficient is less than the second diffuse reflection coefficient. The diffuse reflection coefficient is the ratio of the luminous flux diffused to the surroundings to the total reflected luminous flux, and the value range is between 0-1, 0 represents complete absorption, and 1 represents complete reflection.

[0079] It should be noted that, in the first area 122 and the second area 123, the closer to the light bar 130, the more concentrated the light is and the more serious the bright edge phenomenon is. By setting the diffuse reflection coefficient of the first substructure to be smaller than the diffuse reflection coefficient of the second substructure, the area close to the light bar 130 can achieve a better diffuse reflection effect, thereby better improving the bright edge phenomenon.

[0080] In some embodiments of this application, please refer to Fig.10 A hollow structure is provided on the reflective plate 140, and the hollow structure is arranged opposite to the diffuse reflection structure 160. It should be noted that the reflective plate 140 covers the inner surface 1201 of the back plate 120. The light of the light bar 130 is reflected by the reflective plate 140, and part of the light passes through the reflective plate 140 through the hollow structure and irradiates the back plate 120. The diffuse reflection structure 160 on the back plate 120 changes the propagation direction of the light, so that part of the light cannot be reflected back to the installation cavity 101 through the hollow structure, thereby causing light loss at the position of the hollow structure, thereby improving the phenomenon of light concentration and the phenomenon of bright edges.

[0081] For details, please continue to see Fig.10 The hollow structure includes a plurality of through holes 141 penetrating the reflective plate 140 , and the light reflected by the diffuse reflection structure 160 is emitted through the through holes 141 .

[0082] In some embodiments of the present application, the display device 100 may further include a light-absorbing coating, and at least a portion of the diffuse reflection structure 160 is coated with the light-absorbing coating, wherein the diffuse reflection structure 160 may be partially coated with the light-absorbing coating, or the entire diffuse reflection structure 160 may be coated with the light-absorbing coating. It can be understood that the light-absorbing coating can absorb a portion of the light, further increasing the light loss.

[0083] Specifically, the light absorbing coating may be a black ink coating.

[0084] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display device, characterized in that: include: Display panel; a backplane, the backplane being arranged opposite to the display panel, the backplane comprising an inner surface facing the display panel, the inner surface comprising a middle area, a first area, and a second area, the middle area being located between the first area and the second area, one side edge of the middle area being connected to the first area, and the other side edge being connected to the second area; a light bar, the light bar being arranged in the middle area and extending from the first area to the second area; Wherein, the first area is provided with a diffuse reflection structure, and / or the second area is provided with a diffuse reflection structure.

2. The display device according to claim 1, characterized in that The first area includes a first sub-area, the orthographic projection of the light bar in the first area is located in the first sub-area, and the diffuse reflection structure covers the first sub-area.

3. The display device according to claim 1, characterized in that The second area includes a second sub-area, the orthographic projection of the light bar in the second area is located in the second sub-area, and the diffuse reflection structure covers the second sub-area.

4. The display device according to claim 1, characterized in that The diffuse reflection structure includes a first substructure and a second substructure, the second substructure is located on a side of the first substructure away from the light bar, the diffuse reflection coefficient of the first substructure is a first diffuse reflection coefficient, the diffuse reflection coefficient of the second substructure is a second diffuse reflection coefficient, and the first diffuse reflection coefficient is smaller than the second diffuse reflection coefficient.

5. The display device according to claim 1, characterized in that The diffuse reflection structure includes a plurality of diffuse reflection protrusions, and the diffuse reflection protrusions protrude from the inner surface of the back plate; And / or, the diffuse reflection includes a plurality of diffuse reflection grooves, and the diffuse reflection grooves are recessed from the inner surface of the back plate toward the outer surface of the back plate.

6. The display device according to claim 1, characterized in that: The diffuse reflection structure covers the first area, and / or the diffuse reflection structure covers the second area.

7. The display device according to claim 1, characterized in that: The display device further includes: A reflector plate is stacked with the back plate, and the reflector plate is arranged on the side where the inner surface of the back plate is located. The reflector plate is provided with a hollow structure, and the hollow structure is arranged opposite to the diffuse reflection structure.

8. The display device according to claim 7, characterized in that: The hollow structure includes a plurality of through holes penetrating the reflective plate, and part of the light irradiated to the hollow structure is irradiated to the diffuse reflection structure through the plurality of through holes, and part of the light reflected by the diffuse reflection structure is returned through the through holes.

9. The display device according to claim 1, characterized in that: The diffuse reflection structure is integrally formed with the back plate.

10. The display device according to claim 1, characterized in that: The display device further includes: A light-absorbing coating is coated on at least part of the surface of the diffuse reflection structure, and the light-absorbing coating is used to absorb part of the light irradiated onto the surface.

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