Backlight module and display device

Abstract

Embodiments of the present disclosure provide a backlight module and a display device. The backlight module comprises: a light-emitting substrate comprising a substrate and a plurality of light-emitting elements arranged on the substrate; a supporting structure arranged around the light-emitting area of the light-emitting substrate; a light homogenizing plate arranged on one side of the supporting structure along the light-emitting direction of the light-emitting substrate, a preset distance being arranged between the light homogenizing plate and the light-emitting substrate, the supporting structure being provided with a supporting end face facing the light homogenizing plate; and a filling material strip arranged on the supporting end face along the extension direction of the supporting end face, the light homogenizing plate being arranged on the side of the filling material strip away from the supporting structure, so that the filling material strip is squeezed and fills the gap between the light homogenizing plate and the supporting end face. The technical solution of the present disclosure can improve the problem of blue light emission at the edge of the display picture when the light-emitting elements emit blue light.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, and in particular, to a backlight module and a display device. BACKGROUND

[0002] Quantum dot material has the characteristics of wide excitation spectrum, narrow emission spectrum, high color purity and good light stability. The application of quantum dot material in display devices can improve the color gamut of display devices. However, while improving the vividness of display pictures, quantum dot material has the problem of blue light emission at the edge of the display device. With the rapid popularization of narrow frame display devices, the problem of blue light emission at the edge is becoming more and more obvious. SUMMARY

[0003] Embodiments of the present disclosure provide a backlight module and a display device to solve or alleviate one or more technical problems in the prior art.

[0004] As a first aspect of the embodiments of the present disclosure, a backlight module is provided, comprising:

[0005] A light-emitting substrate comprising a substrate and a plurality of light-emitting elements arranged on one side of the substrate, the light-emitting substrate comprising a light-emitting area and a frame area located at the periphery of the light-emitting area, and the light-emitting elements being located in the light-emitting area;

[0006] A supporting structure arranged around the light-emitting area of the light-emitting substrate;

[0007] A light homogenizing plate arranged on one side of the supporting structure along the light-emitting direction of the light-emitting substrate, a preset distance being arranged between the light homogenizing plate and the light-emitting substrate, and the supporting structure being provided with a supporting end face facing the light homogenizing plate;

[0008] A filler material strip arranged on the supporting end face along the extension direction of the supporting end face, the light homogenizing plate being pressed on the side of the filler material strip away from the supporting structure, and the filler material strip being extruded and filling the gap between the light homogenizing plate and the supporting end face.

[0009] In some embodiments, the material of the filler material strip comprises a thermoplastic elastomer.

[0010] In some embodiments, the light-emitting elements emit first color light, and the filler material strip is doped with a functional material, the functional material being used to absorb the first color light or generate white light under the first color light.

[0011] In some embodiments, the functional material comprises a fluorescent powder, and the fluorescent powder generates white light under the first color light.

[0012] In some embodiments, the first color light comprises blue light, and the fluorescent powder comprises yellow fluorescent powder.

[0013] In some embodiments, the support end face is provided with a groove along the extension direction of the support end face, and a part of the filling material strip is embedded in the groove, and another part of the filling material strip fills the gap between the support end face and the light uniformizing plate.

[0014] In some embodiments, the width of the groove is 1mm-2mm; and / or, the depth of the groove is greater than or equal to 1mm.

[0015] In some embodiments, the supporting structure is provided with an inner side surface connected with the support end face, and the surface of the inner side surface is provided with a reflective layer.

[0016] In some embodiments, the backlight module further comprises a back plate, the back plate comprises a support portion and a folding portion arranged along the edge of the support portion, the light emitting substrate, the supporting structure and the light uniformizing plate are located in the space defined by the support portion and the folding portion, and the supporting structure surrounds the periphery of the light emitting substrate.

[0017] The backlight module further comprises an optical film set, and the optical film set is located on the side of the light uniformizing plate away from the light emitting substrate.

[0018] In some embodiments, the orthographic projection of the light uniformizing plate on the support portion is located on the inner side of the orthographic projection of the optical film set on the support portion.

[0019] In some embodiments, a preset gap for accommodating the expansion deformation of the optical film set is arranged between the outer edge of the optical film set and the folding portion.

[0020] As a second aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a display device, comprising the backlight module in any of the embodiments of the present disclosure, and further comprising a display panel, and the display panel is located on the light emitting side of the backlight module.

[0021] The technical scheme of the embodiments of the present disclosure, the filling material strip is located on the support end face and arranged along the extension direction of the support end face, so that the filling material strip surrounds the light emitting area of the light emitting substrate; the light uniformizing plate is pressed on the filling material strip so that the filling material strip is squeezed and fills the gap between the light uniformizing plate and the support end face. Such a structure, the filling material strip can fill the gap between the light uniformizing plate and the support end face, prevent the light generated by the light emitting element from leaking out of the gap between the light uniformizing plate and the support end face, and reduce the edge light leakage of the backlight module. When the light emitting element emits blue light, the backlight module of the embodiments of the present disclosure can reduce the edge blue light leakage and improve the problem of blue light at the edge of the display picture.

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

[0023] In the drawings, like reference numerals refer to like elements throughout the various figures. The drawings are not necessarily to scale, and the emphasis is on the functional relationships between elements. It should be understood that these drawings are merely examples, which should not limit the scope of the disclosure.

[0024] Figure 1 A structural schematic diagram of a display device in the related art;

[0025] Figure 2 A structural schematic diagram of a display device in the related art;

[0026] Figure 3 A structural schematic diagram of a display device in the related art; Figure 2 A schematic diagram of a gap between a light uniformizing plate and a supporting structure;

[0027] Figure 4 A structural schematic diagram of a display device in an embodiment of the disclosure;

[0028] Figure 5 A structural schematic diagram of a display device in the related art; Figure 4 A schematic diagram of a light path of a gap between a light uniformizing plate and a supporting structure;

[0029] Figure 6 A structural schematic diagram of a display device in the related art; Figure 4 A sectional schematic diagram of a supporting structure.

[0030] Legend of reference numerals:

[0031] 11 / back plate; 12 / light guide plate; 13 / quantum dot film; 14 / optical film set; 16 / 27 / outer rubber frame; 17 / cellular foam; 18 / display panel; 22 / rubber material; 23 / light emitting substrate; 24 / supporting structure; 25 / light uniformizing plate; 26 / optical film set; 19 / cushioning member. DETAILED DESCRIPTION

[0032] In the following, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the disclosure, and different embodiments can be combined arbitrarily without conflict. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0033] The light emitting diode (LED) in the disclosure can be a mini light emitting diode (Mini LED), or can be a micro light emitting diode (Micro LED).

[0034] The reasons for causing the edge blue of the quantum dot display device mainly include quantum dot film itself factors and display device structure factors. For the edge blue caused by the quantum dot film itself factors, the edge blue can be improved by improving the quality of the water and oxygen barrier film. For the edge blue caused by the display device structure factors, the edge blue needs to be improved by further improving the structure of the display device.

[0035] Figure 1 A structural schematic diagram of a display device in the related art is shown. As shown in Figure 1 , the display device includes a backlight module and a display panel 18, and the backlight module is a side-in backlight module. The side-in backlight module includes a light source 10, a light guide plate 12, a back plate 11, a quantum dot film 13, and an optical film group 14, and the light source is located at the side of the light guide plate. The back plate 11 includes a support part 111 and a folded edge part 112, and the folded edge part 112 is arranged along the edge of the support part 111. The light guide plate 12, the quantum dot film 13, and the optical film group 14 are all located in the space defined by the back plate 11. The lower surface of the light guide plate 12 is provided with a reflective sheet 15. The backlight module can also include an outer rubber frame 16, and the outer rubber frame 16 is lapped at the upper end of the folded edge part. The display panel is located at the light exit side of the backlight module, and the foam 17 is arranged between the display panel 18 and the outer rubber frame 16. It should be noted that Figure 1 , the light source 10 is located at the right side of the light guide plate 12 in general, and the specific arrangement mode of the light source 10 and the light guide plate 12 can be determined according to actual conditions.

[0036] The light source can generate blue light, and the quantum dot film has a peripheral failure zone, which causes a part of the blue light to leak out. By improving the material and design of the quantum dot film, the blue light leakage caused by the peripheral failure zone can be improved. In addition, the structure of the existing backlight module also causes a part of the light to leak out, thereby causing the blue light to leak out and the edge of the display picture to be blue. For example, Figure 1 , the blue light generated by the light source is transmitted through the light guide plate to be uniform, and a part of the light does not pass through the quantum dot film to be converted into white light but leaks out from the edge.

[0037] Figure 2 A structural schematic diagram of a display device in the related art is shown. As shown in Figure 2 , the display device adopts a direct type backlight module, and the display panel 18 is located at the light exit side of the direct type backlight module. The direct type backlight module can include a back plate 21, a light emitting substrate 23, a supporting structure 24, a light uniformization plate 25, an optical film group 26, and an outer rubber frame 27. The display panel 18 is located at the upper side of the outer rubber frame 27, and the foam is arranged between the display panel 18 and the outer rubber frame 27.

[0038] As shown in Figure 2As shown, the light-emitting substrate 23 may include a substrate and a plurality of light-emitting diodes disposed on the substrate. The lower side of the light-emitting substrate 23 is fixed to the back plate 21 by an adhesive. The optical film assembly 26 is located above the light-diffusing plate 25, which is supported by the support structure 24, so that a light mixing distance is formed between the light-emitting substrate 23 and the light-diffusing plate 25.

[0039] It should be noted that the optical film assembly 26 may include multiple layers of optical films. When the temperature increases, each optical film and the light-diffusing plate 25 will expand. Therefore, a certain gap will be reserved between the film layers located between the supporting structure 24 and the outer frame 27. During the operation of the display device, light leakage will occur due to the gaps between the film layers.

[0040] Figure 3 for Figure 2 A schematic diagram showing light leakage through the gap between the uniform light plate and the supporting structure. (See diagram below.) Figure 3 As shown, the light emitted by the light-emitting substrate 23 will leak out through the gap between the light-diffusing plate 25 and the supporting structure 24, resulting in light leakage at the edge of the display device.

[0041] In order to improve Figure 2 To reduce light leakage, one approach is to increase the size of the optical film assembly 26 and the light-diffusing plate 25, allowing more light to enter the light-diffusing plate 25 or the optical film assembly 26, thus reducing the amount of light leakage. Another approach is to use adhesive to fix the fluorescent powder strip to the upper surface of the supporting structure 24, thereby reducing the amount of light leaking out from the gap between the light-diffusing plate 25 and the supporting structure 24.

[0042] In the first method, the backlight module undergoes high and low temperature operating conditions during reliability testing, causing deformation of the optical film. The optical film expands at high temperatures and contracts at low temperatures. For example, in a 31.5-inch display product, after reliability testing, the single-sided dimension of the optical film will shrink by about 1mm, making edge light leakage more severe.

[0043] For the second method, the adhesion between the adhesive and the surface of the light-diffusing plate 25 is poor, resulting in an unsatisfactory effect in improving light leakage.

[0044] It should be noted that the light-emitting diodes in the light-emitting substrate 23 typically emit blue light, and the optical film assembly 26 may include a quantum dot film, which can convert the blue light emitted by the light-emitting diodes into white light. When the blue light emitted by the light-emitting substrate 23 leaks out through the gap between the light-diffusing plate 25 and the supporting structure 24, it will cause the edges of the displayed image to appear blue.

[0045] Figure 4 This is a schematic diagram of the structure of a display device according to an embodiment of this disclosure. Figure 4As shown, the display device includes a backlight module and a display panel 18, the display panel 18 is located on the light emitting side of the backlight module. The backlight module can include a light emitting substrate 23, a supporting structure 24, a light homogenizing plate 25 and a filling material strip 30. The light emitting substrate 23 includes a substrate and a plurality of light emitting elements arranged on one side of the substrate. The light emitting element can be a light emitting diode. The light emitting substrate 23 can include a light emitting area and a frame area located at the periphery of the light emitting area, and the light emitting element can be located in the light emitting area. Exemplarily, a plurality of light emitting elements can be arranged at intervals in the light emitting area. The frame area does not arrange the light emitting element.

[0046] The supporting structure 24 can be arranged around the light emitting area of the light emitting substrate 23. That is, the supporting structure 24 can be arranged at the periphery of the light emitting area, so that the supporting structure 24 can surround the light emitting area.

[0047] The light homogenizing plate 25 is arranged on one side of the supporting structure 24 along the light emitting direction of the light emitting substrate 23. A predetermined distance is arranged between the light homogenizing plate 25 and the light emitting substrate 23, and the supporting structure 24 is provided with a supporting end surface 241 facing the light homogenizing plate 25.

[0048] For example, Figure 4 The light emitting direction of the light emitting substrate 23 is upward from the light emitting substrate 23, so that the light homogenizing plate 25 is arranged on the upper side of the supporting structure 24. The supporting end surface 241 can be the upper side end surface of the supporting structure 24, and the light homogenizing plate 25 is supported by the supporting structure 24, that is, the light homogenizing plate 25 is supported on the supporting end surface 241 of the supporting structure 24.

[0049] The predetermined distance between the light homogenizing plate 25 and the light emitting substrate 23 can be used as the light mixing distance of the backlight module, so that the light emitted by each light emitting element in the light emitting substrate 23 can be fully mixed before entering the light homogenizing plate 25.

[0050] As Figure 4 As shown, the filling material strip 30 is arranged on the supporting end surface 241 and along the extension direction of the supporting end surface 241, so that the filling material strip 30 surrounds the light emitting area of the light emitting substrate 23. The light homogenizing plate 25 is pressed on the side of the filling material strip 30 away from the supporting structure 24, the filling material strip 30 is extruded and fills the gap between the light homogenizing plate 25 and the supporting end surface 241, preventing the light generated by the light emitting element from leaking out of the gap. Exemplarily, the light homogenizing plate 25 can be pressed on the filling material strip 30 under the action of gravity or external force, so that the filling material strip 30 is extruded by the light homogenizing plate 25, and then the filling material strip 30 can fill the gap between the light homogenizing plate 25 and the supporting structure 24.

[0051] The backlight module of the embodiment of the present disclosure, the filling material strip 30 is located on the support end surface 241 and is arranged along the extension direction of the support end surface 241, so that the filling material strip 30 surrounds the light-emitting area of the light-emitting substrate 23; the light homogenizing plate 25 is pressed on the filling material strip 30 so that the filling material strip 30 is extruded and fills the gap between the light homogenizing plate 25 and the support end surface 241. Such a structure can fill the gap between the light homogenizing plate 25 and the support end surface 241 with the filling material strip 30, prevent the light generated by the light-emitting element from leaking out of the gap between the light homogenizing plate 25 and the support end surface 241, and reduce the edge light leakage of the backlight module. When the light-emitting element emits blue light, the backlight module of the embodiment of the present disclosure can reduce the edge blue light leakage and improve the problem of blue light at the edge of the display picture.

[0052] Figure 5 To Figure 4 The schematic diagram of the light path of the gap between the light homogenizing plate and the support structure. As Figure 5 shown, when the light emitted by the light-emitting element on the light-emitting substrate 23 reaches the gap between the light homogenizing plate 25 and the support end surface 241, the filling material strip 30 can prevent the light emitted by the light-emitting element from leaking out of the gap. When the light-emitting element emits blue light, the backlight module of the embodiment of the present disclosure can reduce the edge blue light leakage and improve the problem of blue light at the edge of the display picture.

[0053] Exemplarily, the surface of the light homogenizing plate 25 on the side facing the light-emitting substrate 23 can be provided with a light homogenizing pattern, so that the gap between the light homogenizing plate 25 and the support structure 24 can be an irregular gap. After being extruded, the filling material strip 30 can fill the irregular gap according to the shape of the irregular gap, so that the irregular gap between the light homogenizing plate 25 and the support structure 24 can be completely filled with the filling material strip 30, preventing the light generated by the light-emitting element from leaking out of the gap between the light homogenizing plate 25 and the support structure 24.

[0054] In one embodiment, the material of the filling material strip 30 can include thermoplastic elastomer (TPE / TPR). The filling material strip 30 of such material has good thermoplasticity and elasticity. When the filling material strip 30 is extruded, the filling material strip 30 can deform according to the gap between the light homogenizing plate 25 and the support structure 24 and completely fill the gap, and the filling material strip 30 can maintain the shape of filling the gap and effectively block the light from leaking out of the gap.

[0055] In one embodiment, the light-emitting element can emit first color light, and the filling material strip 30 is doped with a functional material for absorbing the first color light or generating white light under the first color light.

[0056] For example, the functional material can absorb a first color of light, thereby preventing the first color of light from leaking out of the gap by the filler material strip 30. The first color of light may include blue light, and the functional material may be a material capable of absorbing blue light. The functional material particles are doped into the filler material strip 30 so that the functional material absorbs blue light and prevents blue light from leaking out of the gap.

[0057] For example, the functional material can produce white light under a first color of light. The functional material may include phosphor, which produces white light under the first color of light. For instance, the phosphor is excited to produce a second color of light, which mixes with the first color of light to produce white light.

[0058] For example, the first color light includes blue light, the phosphor includes yellow phosphor, the yellow phosphor is excited to produce yellow light, and the yellow light is mixed with the blue light to form white light.

[0059] It should be noted that functional materials are not limited to phosphors; functional materials can also be other materials that can absorb primary color light.

[0060] Understandably, for viewers, a bluish tinge at the edges of the displayed image has a significant visual impact, affecting the overall display quality. However, with the backlight module of this embodiment, when the functional material generates white light under the first color light, the edges of the displayed image are white. This white light has a minimal visual impact, and the bluish tinge at the edges of the displayed image does not affect the display quality and generally does not degrade the user's viewing experience.

[0061] Figure 6 for Figure 4 A cross-sectional schematic diagram of the central support structure. In one embodiment, such as... Figure 4 and Figure 6 As shown, a groove 243 is formed on the supporting end face 241 along its extending direction. A portion of the filling material strip 30 is embedded in the groove 243, and the other portion of the filling material strip 30 fills the gap between the light-diffusing plate 25 and the supporting end face 241. With this structure, the groove 243 can position the filling material strip 30, preventing it from shifting during the compression process by the light-diffusing plate 25 and affecting the filling effect. By setting the groove 243, the filling material strip 30 can be positioned in a preset position, improving its filling effect on the gap.

[0062] The groove 243 can be set along the extension direction of the support end face 241, so that after the filling material strip 30 is embedded in the groove 243, the filling material strip 30 surrounds the light-emitting area.

[0063] The cross-sectional shape of the groove 243 can be set as needed. For example, the cross-sectional shape of the groove 243 can be polygonal, such as a quadrilateral.

[0064] As shown in Figure 6 The width W of the groove 243 can be 1mm-2mm, for example, the width W of the groove 243 can be 1mm, 1.5mm or 2mm. The width of the groove 243 is the dimension of the groove 243 in the direction perpendicular to the extension direction thereof. The depth H of the groove 243 can be greater than or equal to 1mm.

[0065] In one embodiment, the required filling material strip 30 can be prepared or purchased, the filling material strip 30 is installed in the groove 243, and then the light uniformity plate 25 is placed on the side of the filling material strip 30 away from the support structure 24, so that the light uniformity plate 25 is pressed on the filling material strip 30, and the filling material strip 30 is squeezed and fills the gap between the light uniformity plate 25 and the support end surface 241. In this way, the filling material strip 30 required according to the display product specification needs to be purchased or prepared.

[0066] In another embodiment, a filling device such as a hot glue gun can be used to fill thermoplastic resin in the groove 243, and functional materials can be doped in the thermoplastic resin. The thermoplastic resin forms the filling material strip 30 after returning to room temperature, so as to install the filling material strip 30 in the groove 243. In this way, the preparation of the filling material strip 30 can be realized by using a conventional filling device such as a hot glue gun, and the filling material strip 30 required according to the display product specification can be prepared, without the need to purchase or prepare the filling material strip 30 additionally, which is beneficial to reduce the cost.

[0067] The thermoplastic resin can include thermoplastic rubber. The thermoplastic rubber is filled in the groove 243, and the thermoplastic rubber has certain elasticity and viscosity. When the light uniformity plate 25 is pressed on the thermoplastic rubber, the thermoplastic rubber is squeezed and filled into the gap between the light uniformity plate 25 and the support end surface 241, so as to ensure that the gap between the light uniformity plate 25 and the support end surface 241 is completely filled.

[0068] In one embodiment, as shown in Figure 4 The support structure 24 is provided with an inner side surface 242 facing the light emitting area, and the inner side surface 242 is connected with the support end surface 241. The surface of the inner side surface 242 is provided with a reflective layer. The reflective layer is arranged on the inner side surface 242, so that the light irradiated to the inner side surface 242 can be reflected back to the light emitting area, reducing the number of light lines entering the gap between the light uniformity plate 25 and the support end surface 241, and further improving the problem of bright edge or blue edge of the backlight module.

[0069] Exemplarily, the inner side surface 242 can be an open inclined surface, for example, the inner side surface 242 of the supporting structure 24 is an open inclined surface from the direction of the light-emitting substrate 23 to the direction of the light homogenizing plate 25, so that the light rays irradiated to the reflective layer can be reflected into the light homogenizing plate 25, reducing the loss of light rays and reducing the number of light rays entering the gap between the light homogenizing plate 25 and the support end surface 241.

[0070] The material of the reflective layer can include silver, and the material of the reflective layer can also be other materials with reflective properties.

[0071] As shown in Figure 4 , the backlight module can further include a back plate 21, the back plate 21 includes a support part 211 and a folding edge part 212, the folding edge part 212 can be arranged along the edge of the support part 211. The light-emitting substrate 23, the supporting structure 24 and the light homogenizing plate 25 are all located in the space defined by the support part 211 and the folding edge part 212. The supporting structure 24 is arranged around the periphery of the light-emitting substrate 23.

[0072] The side of the light-emitting substrate 23 away from the light-emitting element can be attached to the upper surface of the support part 211 by the adhesive 22, the adhesive 22 can include heat-conducting easy-to-pull adhesive. The supporting structure 24 can be placed on the upper surface of the support part 211, and the supporting structure 24 is arranged around the periphery of the light-emitting substrate 23. The light homogenizing plate 25 is located on the upper side of the supporting structure 24.

[0073] As shown in Figure 4 , the backlight module can further include an optical film set 26, the optical film set 26 is located on the side of the light homogenizing plate 25 away from the light-emitting substrate 23. The optical film set 26 can include a quantum dot film, which can convert the first color light emitted by the light-emitting element into white light. The first color light can be blue light.

[0074] The optical film set 26 can further include optical films such as prism films, diffusion films and the like that are beneficial to light homogenization.

[0075] In one embodiment, as shown in Figure 4 , the orthographic projection of the light homogenizing plate 25 on the support part 211 can be located inside the orthographic projection of the optical film set 26 on the support part 211, that is, in Figure 4 , the horizontal dimension of the optical film set 26 is greater than the horizontal dimension of the light homogenizing plate 25. Therefore, even if a small amount of light leaks from the gap between the light homogenizing plate 25 and the supporting structure 24, since the horizontal dimension of the optical film set 26 is greater than the horizontal dimension of the light homogenizing plate 25, the leaked light can enter the optical film set 26 to be converted into white light or to be homogenized, reducing the brightness of the edge light leakage of the backlight module, and further improving the problem of edge lightening or edge blueness.

[0076] In one embodiment, the optical film group 26 is located in the space defined by the folding edge portion 212. A preset gap for accommodating the expansion deformation of the optical film group 26 is provided between the outer edge of the optical film group 26 and the folding edge portion 212. Thus, during the reliability test or product use, when the product temperature rises, the preset gap can accommodate the amount of deformation of the optical film group 26 due to high-temperature expansion, avoiding damage to the optical film group 26 due to insufficient space to accommodate the expansion deformation, and improving the performance of the product.

[0077] The size of the preset gap can be set as needed and is not specifically limited herein.

[0078] The present disclosure also provides a display device, which includes the backlight module in any of the embodiments of the present disclosure. The display device can further include a display panel 18, which can be located on the light-emitting side of the backlight module. As shown in the figure, the display device can further include an outer rubber frame 27, which is lapped on the upper end surface of the folding edge portion 212. The display panel 18 is located on the upper side of the outer rubber frame 27, and a buffer 19 is provided between the display panel 18 and the outer rubber frame 27, which can include foam. Figure 4

[0079] The display device can be any product or component with display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, etc.

[0080] In the description of the present disclosure, it should be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present disclosure.

[0081] In addition, the terms “first” and “second” are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with “first” and “second” can explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of “multiple” is two or more, unless otherwise specifically limited.

[0082] ​In the present disclosure, unless specifically defined otherwise, the terms "mounting", "connection", "connecting", "fixed", and like terms should be construed broadly and, for example, can be a fixed connection, or detachable connection, or integral; can be a mechanical connection, or electrical connection, or communication; can be direct connection, or indirect connection through an intermediate medium; can be internal connection of two elements, or interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0083] In the present disclosure, unless specifically defined otherwise, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. "Under", "below" and "underneath" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0084] The above disclosure provides many different embodiments or examples for implementing 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 repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0085] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any skilled person in the art can easily think of various changes or replacements within the technical scope disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A backlight module, characterized in that, The backlight module comprises: a light-emitting substrate comprising a substrate and a plurality of light-emitting elements arranged on one side of the substrate, the light-emitting substrate comprising a light-emitting area and a frame area located at the periphery of the light-emitting area, the light-emitting elements being located in the light-emitting area; a supporting structure arranged around the light-emitting area of the light-emitting substrate; a light homogenizing plate arranged on one side of the supporting structure along the light-emitting direction of the light-emitting substrate, a preset distance being arranged between the light homogenizing plate and the light-emitting substrate, the supporting structure being provided with a supporting end surface facing the light homogenizing plate; a filling material strip arranged on the supporting end surface along the extension direction of the supporting end surface, the light homogenizing plate being pressed on the side of the filling material strip away from the supporting structure, the filling material strip being extruded and filling the gap between the light homogenizing plate and the supporting end surface to prevent light generated by the light-emitting elements from leaking out of the gap between the light homogenizing plate and the supporting structure; the surface of the light homogenizing plate on the side facing the light-emitting substrate is provided with a light homogenizing pattern, and the gap between the light homogenizing plate and the supporting structure is an irregular gap; the supporting end surface is provided with a groove along the extension direction of the supporting end surface, a part of the filling material strip being embedded in the groove, and another part of the filling material strip filling the gap between the light homogenizing plate and the supporting end surface.

2. The backlight module of claim 1, wherein, The material of the filling material strip comprises a thermoplastic elastomer.

3. The backlight module of claim 1, wherein, The light-emitting elements emit light of a first color, and the filling material strip is doped with a functional material for absorbing light of the first color or generating white light under light of the first color.

4. The backlight module of claim 3, wherein, The functional material comprises a fluorescent powder for generating white light under light of the first color.

5. The backlight module of claim 4, wherein, The light of the first color comprises blue light, and the fluorescent powder comprises yellow fluorescent powder.

6. The backlight module of claim 1, wherein, The width of the groove is 1-2 mm, and / or the depth of the groove is greater than or equal to 1 mm.

7. The backlight module of claim 1, wherein, The supporting structure is provided with an inner side surface connected to the supporting end surface, and the surface of the inner side surface is provided with a reflective layer.

8. The backlight module of claim 1, wherein, Further comprising a back plate comprising a supporting portion and a folding portion arranged along the edge of the supporting portion, the light-emitting substrate, the supporting structure and the light homogenizing plate being located in the space defined by the supporting portion and the folding portion, and the supporting structure being arranged around the periphery of the light-emitting substrate; The backlight module further comprises an optical film group located on the side of the light homogenizing plate away from the light-emitting substrate.

9. The backlight module of claim 8, wherein, The orthographic projection of the light homogenizing plate on the supporting portion is located on the inner side of the orthographic projection of the optical film group on the supporting portion.

10. The backlight module of claim 9, wherein, A preset gap is arranged between the outer edge of the optical film group and the folding portion for accommodating the expansion deformation of the optical film group.

11. A display device comprising: The backlight module comprises the backlight module according to any one of claims 1-10, and further comprises a display panel located on the light-emitting side of the backlight module.

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