Backlight module and display device

Abstract

The invention provides a backlight module and a display device, and the backlight module comprises a frame structure which comprises a bottom plate and a side plate connected with the bottom plate; the light-emitting element is positioned on one side of the bottom plate; the diffusion layer is located on the side, away from the bottom plate, of the light-emitting element and comprises a first side face; the first reflection part is located on the first side face, and a gap is formed between the first reflection part and the opposite side plate in the direction parallel to the plane where the bottom plate is located. According to the backlight module, direct contact between the first reflection part and the side plate can be avoided, the situation that the first reflection part is extruded by the side plate due to preparation errors or external action is avoided, and the reliability of the first reflection part is guaranteed. Besides, the situation that light reflected by the edge, close to the side plate, of the first reflection part is directly emitted without passing through the quantum dot film located above the diffusion layer can be avoided, the phenomenon that due to the problems, edge light leakage occurs, for example, the phenomenon that the periphery of the visual effect is blued due to blue light leakage occurs is avoided, and the use performance of the backlight module is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic products, and in particular to a backlight module and a display device. Background Art

[0002] Light-emitting diodes (LEDs) are widely used in lighting and display technologies due to their small size, low power consumption, long lifespan, and high brightness. Micro-LED displays, which feature LED arrays of individual pixel elements, offer improved contrast, faster response times, and lower energy consumption compared to currently used display devices.

[0003] However, due to the structural limitations of existing backlight modules, the performance of the backlight modules cannot meet the requirements.

[0004] Therefore, a new backlight module and display device are urgently needed. Summary of the Invention

[0005] In view of this, the present invention provides a backlight module and display device. These features, on the one hand, prevent direct contact between the first reflector and the side panels, thereby preventing the side panels from squeezing the first reflector due to manufacturing errors or external forces, thereby ensuring the reliability of the first reflector. On the other hand, they prevent light reflected from the edge of the first reflector near the side panels, which occurs when the first reflector and the side panels are in close contact, from passing directly through the quantum dot film above the diffusion layer due to the gap between the first reflector and the diffusion layer. This prevents edge light leakage caused by the aforementioned issue, such as the visual effect of a bluish periphery caused by blue light leakage, thereby improving the performance of the backlight module.

[0006] The present invention provides a backlight module, comprising: a frame structure, including a bottom plate and a side plate connected to the bottom plate; a light-emitting element, located on one side of the bottom plate; a diffusion layer, located on the side of the light-emitting element away from the bottom plate, the diffusion layer including a first side surface; a first reflective portion, located on the first side surface, and having a gap between the first reflective portion and the opposite side plate along a direction parallel to the plane of the bottom plate.

[0007] Based on the same inventive concept, the present invention further provides a display device comprising the above-mentioned backlight module.

[0008] Compared with the related art, the backlight module provided by the present invention includes a frame structure, a light-emitting element, a diffusion layer and a first reflection part. The first reflection part is arranged on the first side of the diffusion layer to utilize the first reflection part to reflect the light leaked from the first side, and this part of the light is emitted into the area corresponding to the direction perpendicular to the bottom plate along the diffusion layer, that is, the viewing area, thereby reducing brightness loss, improving the overall brightness of the backlight module, reducing the energy difference between the edge area and the center area, thereby reducing color difference, and improving the display effect of the display device when the backlight module is applied to the display device. In this embodiment, there is a gap between the first reflection part and the opposite side panel along the direction parallel to the plane where the bottom plate is located. On the one hand, direct contact between the first reflection part and the side panel can be avoided, thereby avoiding the side panel squeezing the first reflection part due to preparation errors or external effects, thereby ensuring the reliability of the first reflection part. On the other hand, it can avoid that when the first reflective part and the side panel are in close contact, the light reflected from the edge of the first reflective part close to the side panel does not pass through the quantum dot film above the diffusion layer but is directly emitted due to the gap between the first reflective part and the diffusion layer, thereby avoiding edge light leakage caused by the above-mentioned problem, such as the blue visual effect caused by blue light leakage, thereby improving the performance of the backlight module. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0010] Figure 1 This is a structural diagram of a backlight module provided by an embodiment of the present invention;

[0011] Figure 2 An embodiment of the present invention provides Figure 1 Schematic diagram of the cross section at point A;

[0012] Figure 3 Another embodiment of the present invention provides Figure 1 Schematic diagram of the cross section at point A;

[0013] Figure 4 Another embodiment of the present invention provides Figure 1 Schematic diagram of the cross section at point A;

[0014] Figure 5 Another embodiment of the present invention provides Figure 1 Schematic diagram of the cross section at point A;

[0015] Figure 6 Another embodiment of the present invention provides Figure 1Schematic diagram of the cross section at point A;

[0016] Figure 7 Another embodiment of the present invention provides Figure 1 Schematic diagram of the cross section at point A;

[0017] Figure 8 Another embodiment of the present invention provides Figure 1 Schematic diagram of the cross section at point A;

[0018] Figure 9 Another embodiment of the present invention provides Figure 1 Schematic diagram of the cross section at point A;

[0019] Figure 10 Another embodiment of the present invention provides Figure 1 Schematic cross-section at point A in the middle. DETAILED DESCRIPTION

[0020] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed in order to provide a comprehensive understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.

[0021] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0022] In the existing technology, part of the light emitted by the light-emitting element leaks out from the side of the diffuser plate and is directly emitted from the backlight module through reflection without passing through the quantum dot film on the diffusion layer. When the light-emitting element uses a blue light chip, the edge light is less and the energy is weaker. There is a color difference with the center, and the visual effect is bluish, which affects the display effect.

[0023] In order to avoid the above problems, the present invention provides a first reflective portion on the first side surface of the diffusion layer, so as to utilize the first reflective portion to reflect the light leaking from the first side surface, and emit this part of the light into the area corresponding to the diffusion layer in the direction perpendicular to the bottom plate, that is, the viewing area, thereby reducing brightness loss, improving the overall brightness of the backlight module, and reducing the energy difference between the edge area and the center area.

[0024] Therefore, the color difference is reduced and the display effect of the display device is improved when the backlight module is applied to the display device.

[0025] In order to better understand the present invention, Figures 1 to 10 A backlight module and a display device according to embodiments of the present invention are described in detail.

[0026] Please also refer to Figures 1 to 2 , Figure 1 is a structural diagram of a backlight module provided according to an embodiment of the present invention; Figure 2 An embodiment of the present invention provides Figure 1 Schematic cross-section at point A in the middle.

[0027] An embodiment of the present invention provides a backlight module, comprising: a frame structure, including a base plate and a side plate connected to the base plate; a light-emitting element, located on one side of the base plate; a diffusion layer, located on the side of the light-emitting element away from the base plate, the diffusion layer including a first side surface; a first reflective portion, located on the first side surface, and having a gap between the first reflective portion and the opposite side plate along a direction parallel to the plane of the base plate.

[0028] For details, please refer to Figure 1 and Figure 2The backlight module provided in this embodiment includes a frame structure 1, a light-emitting element 2, a diffusion layer 3 and a first reflection part 4. The first reflection part 4 is provided on the first side surface C1 of the diffusion layer 3 to utilize the first reflection part 4 to reflect the light leaking from the first side surface C1, and reflect this part of the light to the viewing area. The viewing area may refer to the area corresponding to the diffusion layer 3 in the direction perpendicular to the bottom plate 11, thereby reducing brightness loss, improving the overall brightness of the backlight module, reducing the energy difference between the edge area BA and the center area ZA, thereby reducing chromatic aberration, and improving the display effect of the display device when the backlight module is applied to the display device. In this embodiment, there is a gap between the first reflection part 4 and the opposite side plate 12 in the direction parallel to the plane where the bottom plate 11 is located. On the one hand, direct contact between the first reflection part 4 and the side plate 12 can be avoided, thereby avoiding the side plate 12 from squeezing the first reflection part 4 due to preparation errors or external effects, thereby ensuring the reliability of the first reflection part 4. On the other hand, it can avoid that when the first reflecting part 4 and the side panel 12 are in close contact, the light reflected at the edge of the first reflecting part 4 close to the side panel 12 does not pass through the quantum dot film 7 located above the diffusion layer 3, but is directly emitted, thereby avoiding edge light leakage due to the above-mentioned problem, such as the blue visual effect caused by blue light leakage, thereby improving the performance of the backlight module.

[0029] It should be noted that in this embodiment, the frame structure 1 can be an integrated structure to facilitate molding and provide a higher structural strength. The bottom plate 11 and the side plates 12 can enclose a storage space, which can be a semi-open storage space to facilitate the placement of film components such as the light-emitting element 2 and the diffusion layer 3 in the storage space.

[0030] In this embodiment, the light-emitting element 2 may be a Micro LED (Micro Light Emitting Diode) or a Mini LED (Miniature Light Emitting Diode). Micro LED and Mini LED have advantages such as small size, high luminous efficiency, and low energy consumption. For example, the size of a Micro LED is less than 50 μm, and the size of a Mini LED is less than 100 μm, enabling clear display of numbers and patterns on smaller display panels.

[0031] LED chip structures are classified into face-up structure, vertical structure and flip-down structure. The embodiments of the present invention are applicable to LEDs with face-up structure, vertical structure and flip-down structure.

[0032] Light emitted by the light-emitting element 2 enters the diffusion layer 3, which improves the light's diffusivity, ensuring a soft and even distribution of light, thereby enhancing the display effect. Some of the light that enters the diffusion layer 3 exits from the first side surface C1, so a first reflective portion 4 is required to reflect this portion of light.

[0033] Alternatively, the diffuser film is made of PET (Polyethylene terephthalate) optical material. From a macroscopic perspective, the diffuser film is simply a layer of ordinary PET optical material. However, at a microscopic level, it exhibits a sophisticated three-layer structure: the light-emitting surface particle layer, also known as the diffusion particle layer, is responsible for evenly diffusing light; the PET layer is next, serving as the main structure of the diffuser film; and the bottom layer is the back-coated particle layer, or anti-scratch layer, which enhances the film's wear resistance. The diffuser film has a three-layer microstructure: the light-emitting surface particle layer, the PET layer, and the back-coated particle layer. The structural characteristics of the diffuser film determine its optical and physical properties.

[0034] In this embodiment, the first reflective portion 4 can be made of a reflective material, such as metal, resin, or other materials with satisfactory reflective properties. For example, the first reflective portion 4 can be made of a metal reflective film or a fully dielectric reflective film. Furthermore, a metal-dielectric reflective film that combines the two is also available. The first reflective portion 4 can be coated with a high-reflectivity coating or mirror-silvered to ensure that the reflectivity meets the requirements.

[0035] See also Figure 3 、 Figure 4 , Figure 3 Another embodiment of the present invention provides Figure 1 Schematic diagram of the cross section at point A; Figure 4 Another embodiment of the present invention provides Figure 1 A cross-sectional schematic diagram; in some optional embodiments, the backlight module further includes a reflective structure 5, the reflective structure 5 is provided on one side of the bottom plate 11, and the reflective structure 5 is provided around at least a portion of the light-emitting element 2.

[0036] It can be understood that by setting a reflective structure 5 on the peripheral side of the light-emitting element 2, the reflective structure 5 can be used to reflect the side light emitted by the light-emitting element 2, so that the light can be concentrated in the direction facing the light-emitting element 2, thereby improving the utilization efficiency and light brightness of the light emitted by the light-emitting element 2.

[0037] It should be noted that the reflective structure 5 is arranged around at least part of the light-emitting element 2, which means that the reflective structure 5 can surround part of the light-emitting element 2, that is, the reflective structure 5 can be arranged only on one side of the light-emitting element 2, or the reflective structure 5 can be arranged at intervals around the circumference of the light-emitting element 2, or the reflective structure 5 can also be arranged completely around the light-emitting element 2 to ensure the reflection effect. The specific selection can be made according to the setting position of the light-emitting element 2.

[0038] Optionally, the reflective structure 5 abuts against the diffusion layer 3 in a direction perpendicular to the plane of the bottom plate 11, that is, the reflective structure 5 can be used to directly support the diffusion layer 3 and the film layer thereon. Of course, there can also be a gap between the reflective structure 5 and the diffusion layer 3 to prevent the reflective structure 5 from being damaged.

[0039] See also Figure 3 、 Figure 4 In some optional embodiments, the reflective structure 5 includes a first reflective structure 51 , the first reflective structure 51 is located between adjacent light emitting elements 2 , and the first reflective structure 51 includes a white reflective material.

[0040] In this embodiment, the first reflective structure 51 includes a white reflective material, which may mean that the first reflective structure 51 is formed of a white reflective material, or that a layer of white reflective material is coated on the outer surface of the first reflective structure 51. Since the white reflective material is opaque, the light emitted by the light-emitting element 2 will not pass through the first reflective structure 51, but will be reflected at the first reflective structure 51 to adjust the optical path of the light emitted by the light-emitting element 2, so that the light is concentrated and emitted, thereby improving the utilization efficiency of the light emitted by the light-emitting element 2.

[0041] Optionally, the cross-sectional area of the first reflective structure 51 tends to decrease in the direction from the base plate 11 to the diffusion layer 3. For example, the cross-sectional area of the first reflective structure 51 can be a triangle, a curved triangle, or the like to ensure the reflection effect of the light-emitting element 2 at the first reflective structure 51.

[0042] See also Figure 3 In some optional embodiments, the reflective structure 5 also includes a second reflective structure 52, the second reflective structure 52 includes a first part 521 and a second part 522, the first part 521 is close to the side panel 12 relative to the first reflective structure 51 and the second part 522, and the first part 521 includes a transparent material.

[0043] In this embodiment, the second reflective structure 52 is arranged closer to the side panel 12 relative to the first reflective structure 51, that is, the second reflective structure 52 can be arranged corresponding to the light-emitting element 2 at the edge, and the first part 521 includes a transparent material, so that the light emitted by the light-emitting element 2 can directly pass through the first part 521 and reach the edge of the diffusion layer 3, effectively improving the brightness of the edge of the display area of the diffusion layer 3, that is, the corresponding display device, reducing the energy difference between the edge area BA and the center area ZA, thereby reducing color difference and improving the display effect of the display device to which the backlight module is applied.

[0044] Since the first portion 521 is close to the side panel 12 relative to the first reflective structure 51 and the second portion 522 , to ensure the stability of the fixation of the first portion 521 , optionally, the first portion 521 includes a first connecting portion L1 connected to the side panel 12 .

[0045] The first connection portion L1 may be in the form of a hook structure, for example, a “J” structure connected to the side panel 12 .

[0046] In some optional embodiments, the side panel 12 includes a fixing hole K, and the first connecting portion L1 is snap-connected to the fixing hole K.

[0047] It is understandable that the first connection portion L1 may partially extend into the fixing hole K to be engaged in the fixing hole K, thereby achieving a fixed connection between the first connection portion L1 and the side panel 12 and preventing the first portion 521 from moving.

[0048] In addition to the second reflective structure 52 having both the first part 521 and the second part 522 , the second reflective structure 52 can also eliminate the first part 521 so that the light emitted by the light emitting element 2 can directly reach the edge of the diffusion layer 3 and avoid being blocked by the second reflective structure 52 .

[0049] See also Figure 4 Optionally, the reflective structure 5 also includes a second reflective structure 52, the second reflective structure 52 includes a second portion 522, the second portion 522 is close to the side panel 12 relative to the first reflective structure 51, and there is a gap between the second portion 522 and the side panel 12 along a direction parallel to the plane where the bottom plate 11 is located.

[0050] It can be understood that in this embodiment, the second reflective structure 52 can only include the second part 522, without setting the first part 521, that is, the reflective structure 5 is not set in the area adjacent to the side panel 12, so that the light emitted by the light-emitting element 2 can directly reach the edge of the diffusion layer 3 without passing through the first part 521, thereby increasing the amount of light at the backlight edge, avoiding energy loss, effectively improving the brightness of the edge of the display area, reducing the energy difference between the edge and the center area ZA, and thus reducing chromatic aberration.

[0051] In some optional embodiments, the first reflective structure 51 and the second reflective structure 52 are integrally formed by a two-color injection molding process to simplify the manufacturing process and reduce the manufacturing cost.

[0052] Two-color injection molding involves injecting two different materials into the same mold, resulting in a molded part made of two different materials. Sometimes the two materials are different colors, or sometimes they have different hardnesses, improving the product's aesthetics and assembly performance. In this embodiment, the first reflective structure 51 and the second reflective structure 52 can be formed of different colored materials.

[0053] Optionally, the diffusion layer 3 and the first reflective portion 4 are integrally formed by a two-color injection molding process to simplify the manufacturing process and reduce manufacturing costs. The diffusion layer 3 and the first reflective portion 4 can be made of different materials as needed. For example, the diffusion layer 3 can be made of a material with good light diffusion effect, and the first reflective portion 4 can be made of a material with good light reflection effect.

[0054] See also Figure 3 、 Figure 4 In some optional embodiments, the side panel 12 includes a second side surface 121, a third side surface 123, and a connecting surface 122 connecting the second side surface 121 and the third side surface 123. In a direction parallel to the plane of the base plate 11, the second side surface 121 is arranged away from the light-emitting element 2 relative to the third side surface 123; the diffusion layer 3 extends to the connecting surface 122, and the first reflective portion 4 is located on the connecting surface 122 and is arranged opposite to the second side surface 121.

[0055] It can be understood that the second side surface 121, the third side surface 123 and the connecting surface 122 of the side plate 12 form a stepped structure, and the diffusion layer 3 extends to the connecting surface 122, which means that the bottom surface of the diffusion layer 3 facing the bottom plate 11 can be in contact with the connecting surface 122, that is, the connecting surface 122 can play the role of supporting the diffusion layer 3.

[0056] The first reflecting portion 4 is located on the connecting surface 122, that is, the first reflecting portion 4 is also supported by the connecting surface 122 to ensure the stability of the first reflecting portion 4. The first reflecting portion 4 and the second side surface 121 are arranged opposite to each other, and there is a certain space between the first reflecting portion 4 and the second side surface 121, that is, part of the connecting surface 122 located between the first reflecting portion 4 and the second side surface 121 is exposed to avoid interference between the first reflecting portion 4 and the second side surface 121. At the same time, it can also avoid that when the first reflecting portion 4 and the side panel 12 are tightly attached, due to the gap between the first reflecting portion 4 and the diffusion layer 3, the light reflected at the edge of the first reflecting portion 4 near the side panel 12 does not pass through the quantum dot film 7 located above the diffusion layer 3, but is directly emitted, thereby avoiding edge light leakage, such as the blue visual effect caused by blue light leakage.

[0057] Optionally, the extension directions of the second side surface 121 and the third side surface 123 are parallel, and the extension direction of the connecting surface 122 may intersect with the extension directions of the second side surface 121 and the third side surface 123. For example, the extension direction of the connecting surface 122 may be perpendicular to the extension directions of the second side surface 121 and the third side surface 123.

[0058] See also Figure 5 , Figure 5 Another embodiment of the present invention provides Figure 1 A cross-sectional diagram at center; in some optional embodiments, the display panel further includes a second reflective portion 6 , and the second reflective portion 6 is disposed on the third side surface 123 .

[0059] It can be understood that since the third side surface 123 is closer to the light-emitting element 2 than the second side surface 121, more light emitted by the light-emitting element 2 may be irradiated to the third side surface 123. In this embodiment, a second reflecting portion 6 is provided on the third side surface 123 to utilize the second reflecting portion 6 to reflect the light emitted by the light-emitting element 2 toward the third side surface 123, so that this part of the light can be emitted to the middle area of the backlight module, thereby effectively improving the utilization rate of the light emitted by the light-emitting element 2.

[0060] The second reflecting portion 6 can be made of a metal reflective film or a fully dielectric reflective film. In addition, there is also a metal dielectric reflective film that combines the two. The second reflecting portion 6 can be coated with a high reflectivity coating or mirror silvering to ensure that the reflectivity meets the requirements.

[0061] Optionally, the second reflective portion 6 may be made of the same material as the first reflective portion 4 to reduce costs.

[0062] See also Figures 2 to 5 In some optional embodiments, the first reflective structure 51 and the bottom plate 11 are fixedly connected by double-sided tape J or glue. It should be noted that when the first portion 521 of the second reflective structure 52 is removed, since the first portion 521 is not connected to the side plate 12, in order to ensure the reliability of the first reflective structure 51, the first reflective structure 51 and the bottom plate 11 can be fixedly connected by double-sided tape J or glue, so as to utilize the viscosity of the double-sided tape J or glue to achieve adhesive fixation.

[0063] Optionally, the first reflective structure 51 and the base plate 11 are fixedly connected by glue dispensing, and the glue dispensing may include hot melt glue R or mixed glue to improve the adhesive strength and improve the reliability of fixing the first reflective structure 51. For example, the first reflective structure 51 and the base plate 11 are fixedly connected by hot melt glue R or mixed glue.

[0064] Hybrid glue is usually made from a mixture of multiple ingredients, including different resins, plasticizers and other additives. This mixture makes the glue more adaptable and diverse, and can show good adhesion in different environments and materials.

[0065] See also Figures 6 and 7 In some optional embodiments, the hot melt adhesive R has a columnar structure before hot melting and has a T-shaped structure after hot melting.

[0066] It should be noted that hot melt adhesive R is a plastic adhesive whose physical state changes with temperature within a certain temperature range, while its chemical properties remain unchanged. In this embodiment, an opening can be provided on the base plate 11. The pre-hot melt columnar structure is first inserted into the opening and then heated, so that the hot melt adhesive R forms a T-shaped structure that is clamped to the bottom of the base plate 11.

[0067] For example, the hot melt adhesive R in a T-shaped structure includes a first sub-portion R1 and a second sub-portion R2 connected to each other. The second sub-portion R2 extends relative to the first sub-portion R1 in a direction parallel to the plane of the base plate 11. The base plate 11 includes a first groove Z1 and a second groove Z2 that are connected to each other. The second groove Z2 is located on the side of the first groove Z1 away from the light-emitting element 2. The first sub-portion R1 at least partially extends into the first groove Z1, and the second sub-portion R2 is clamped in the second groove Z2.

[0068] See also Figure 8 In some optional embodiments, the backlight module further includes a quantum dot film 7, which includes an extension portion, which extends a predetermined distance relative to the first reflective portion 4 in the direction of the side panel 12 along a direction parallel to the plane of the bottom plate 11.

[0069] It should be noted that the quantum dot film 7 is a multilayer composite structure formed by dispersing quantum dots (semiconductor nanoparticles) in a resin material and encapsulating it with a thin film with high water vapor barrier. When excited by blue light, the quantum dots can emit high-purity red or green light, and the wavelength can be controlled by adjusting the size of the quantum dots. Therefore, the light-emitting element 2 can be a blue light-emitting element 2.4

[0070] Taking into account that in the prior art, at the edge of the quantum dot film 7, some quantum dots in the quantum dot film 7 layer are damaged due to edge cutting and the quantum dots near the edge are easily oxidized, resulting in failure of some quantum dots at the edge of the backlight quantum dot film 7, that is, there is a problem of failed edge of the quantum dot film 7. In this embodiment, an extension portion is provided so that the extension portion extends a predetermined distance relative to the first reflective portion 4 in the direction of the side panel 12 to reserve some edge redundancy, so that even if the extension portion at the edge of the quantum dot film 7 fails, it will not affect the effectiveness of the part of the quantum dot film 7 located inside the extension portion, thereby improving the display effect and eliminating the influence of the failed edge of the quantum dot film 7.

[0071] See also Figure 9 Alternatively, in some other optional embodiments, along a direction perpendicular to the plane of the bottom plate 11, the surface of the quantum dot film 7 facing the side plate 12 and the surface of the first reflective portion 4 facing the side plate 12 are flush, so as to facilitate preparation and reduce costs.

[0072] See also Figure 10 In some optional embodiments, the first surface of the quantum dot film 7 facing away from the base plate 11 includes a central area ZA and an edge area BA arranged around the central area ZA, and a yellow ink layer 8 is provided at least in the edge area BA.

[0073] Taking into account that the blue light emitted by the blue light-emitting element 2 may leak from the side panel 12 and be directly emitted from the backlight through reflection without passing through the quantum dot film 7, resulting in a bluish visual effect, which affects the display effect. In the embodiment of the present invention, a yellow ink layer 8 is provided corresponding to the edge area BA of the first surface of the quantum dot film 7 away from the base plate 11 to reduce the bluing phenomenon. At the same time, in the above embodiment, the first part 521 of the second reflective structure 52 can also be made of transparent material or the first part 521 can be eliminated to increase the amount of light at the edge of the backlight, thereby avoiding energy loss, effectively improving the brightness of the edge of the display area, and reducing the energy difference between the edge and the center area ZA, thereby reducing color difference, and effectively improving the problem of yellowish and dark edges caused by the provision of the yellow ink layer 8.

[0074] An embodiment of the present invention further provides a display device, comprising the backlight module as described in any of the above embodiments.

[0075] The display device provided by an embodiment of the present invention includes a frame structure 1, a light-emitting element 2, a diffusion layer 3, a first reflection part 4 and a quantum dot film 7. The light-emitting element 2 can be a blue light-emitting element, so that the emitted blue light is converted into green light and red light through the quantum dot film 7. By setting the first reflection part 4 at the edge position of the display device, that is, the first side surface C1 of the diffusion layer 3, the light leaking from the first side surface C1 of the diffusion layer 3 in the light path is reflected back into the viewing area, preventing the blue light from being directly emitted into the visible area, so that all blue light will be mixed by the quantum dot film 7, thereby reducing the blue visual effect phenomenon, reducing brightness loss, improving the overall brightness of the display device, reducing the energy difference between the edge and center parts of the display device, thereby reducing color difference and improving the display effect of the display device.

[0076] Furthermore, the display device can also be provided with a reflective structure 5, which may include a first reflective structure 51 and a second reflective structure 52, the first reflective structure 51 includes a white reflective material, and the first part 521 of the second reflective structure 52 may include a transparent material, so that the light emitted by the light-emitting element 2 can directly pass through the first part 521 and reach the edge of the diffusion layer 3, effectively improving the brightness of the edge of the display area of the diffusion layer 3, that is, the corresponding display device, reducing the energy difference between the edge area BA and the center area ZA, thereby reducing color difference and improving the display effect of the display device to which the backlight module is applied.

[0077] In addition to the second reflective structure 52 with the first part 521 and the second part 522 as mentioned above, the second reflective structure 52 can also eliminate the first part 521 so that the light emitted by the light-emitting element 2 can directly reach the edge of the diffusion layer 3, thereby improving the backlight edge brightness and reducing the color difference between the edge and the surroundings.

[0078] The display device provided by the embodiment of the present invention has the technical effects of the technical solution of the backlight module in any of the above embodiments. The structures and explanations of terms that are the same as or corresponding to the above embodiments are not repeated here.

[0079] The display device provided in the embodiment of the present invention can be applied to a mobile phone, or any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals, etc. The embodiment of the present invention does not specifically limit this.

[0080] The above is only a specific embodiment of the present invention. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the process in the aforementioned method embodiment, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be covered within the protection scope of the present invention.

[0081] It should also be noted that the exemplary embodiments described herein describe methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the steps described above. In other words, the steps may be performed in the order described in the embodiments, or in a different order, or several steps may be performed simultaneously.

Claims

1. A backlight module, characterized in that: include: The frame structure includes a bottom plate and side plates connected to the bottom plate; A light-emitting element is located on one side of the base plate; a diffusion layer, located on a side of the light-emitting element away from the bottom plate, the diffusion layer including a first side surface; The first reflecting portion is located on the first side surface and is parallel to the plane where the bottom plate is located. There is a gap between the first reflecting portion and the opposite side plate.

2. The backlight module according to claim 1, wherein: The backlight module further includes a reflective structure, which is disposed on one side of the bottom plate and surrounds at least a portion of the light-emitting element.

3. The backlight module according to claim 2, wherein: The reflective structure includes a first reflective structure, and the first reflective structure is located between adjacent light-emitting elements; The first reflective structure includes a white reflective material.

4. The backlight module according to claim 3, wherein: The reflective structure further includes a second reflective structure, the second reflective structure includes a first portion and a second portion, the first portion is closer to the side plate than the first reflective structure and the second portion, and the first portion includes a transparent material; The first portion includes a first connecting portion connected to the side plate.

5. The backlight module according to claim 4, wherein: The side plate includes a fixing hole, and the first connecting portion is snap-connected to the fixing hole.

6. The backlight module according to claim 3, wherein: The reflective structure also includes a second reflective structure, which includes a second part. The second part is close to the side plate relative to the first reflective structure, and there is a gap between the second part and the side plate along a direction parallel to the plane where the bottom plate is located.

7. The backlight module according to claim 4 or 6, characterized in that: The first reflective structure and the second reflective structure are integrally formed by a two-color injection molding process.

8. The backlight module according to claim 1, wherein: The diffusion layer and the first reflective portion are integrally formed by a two-color injection molding process.

9. The backlight module according to claim 1, wherein: The side plate includes a second side surface, a third side surface, and a connecting surface connecting the second side surface and the third side surface, and the second side surface is arranged away from the light-emitting element relative to the third side surface in a direction parallel to the plane where the bottom plate is located; The diffusion layer extends to the connecting surface. The first reflecting portion is located on the connecting surface and is arranged opposite to the second side surface.

10. The backlight module according to claim 9, wherein: It also includes a second reflecting portion, which is arranged on the third side surface.

11. The backlight module according to claim 6, wherein: The first reflective structure and the bottom plate are fixedly connected by double-sided tape or glue.

12. The backlight module according to claim 11, wherein: The first reflective structure and the bottom plate are fixedly connected by hot melt adhesive or mixed adhesive.

13. The backlight module according to claim 12, wherein: The hot melt adhesive has a columnar structure before hot melting and a T-shaped structure after hot melting.

14. The backlight module according to claim 1, wherein: The backlight module also includes a quantum dot film, which includes an extension portion. Along a direction parallel to the plane where the bottom plate is located, the extension portion extends a predetermined distance toward the direction where the side plate is located relative to the first reflective portion, or, along a direction perpendicular to the plane where the bottom plate is located, a side surface of the quantum dot film facing the side plate is flush with a side surface of the first reflective portion facing the side plate.

15. The backlight module according to claim 14, wherein: The first surface of the quantum dot film facing away from the bottom plate includes a central area and an edge area arranged around the central area; A yellow ink layer is provided at least in the edge region.

16. A display device, characterized in that: Comprising the backlight module according to any one of claims 1 to 15.

Images