CN110967871A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN110967871A CN110967871A CN201911309210.8A CN201911309210A CN110967871A CN 110967871 A CN110967871 A CN 110967871A CN 201911309210 A CN201911309210 A CN 201911309210A CN 110967871 A CN110967871 A CN 110967871A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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Abstract
The application provides a backlight module and display equipment. The backlight module comprises a substrate, a diffuse reflection layer and a light source. The diffuse reflection layer is formed on the substrate, and a plurality of accommodating grooves which are arranged at intervals are formed in the diffuse reflection layer. The side part of the light source and the top part deviating from the substrate can emit light; the number of the light sources is multiple, the light sources are in one-to-one correspondence with the accommodating grooves, and each light source is arranged in the corresponding accommodating groove. The display device comprises a display panel and the backlight module, wherein the display panel is arranged on one side of the backlight module, which deviates from the substrate.
Description
Technical Field
The application relates to the technical field of display, in particular to a backlight module and a display device.
Background
The liquid crystal display device has the advantages of lightness, thinness, environmental protection, high image quality and the like, and is widely applied. The liquid crystal display device comprises a display panel and a backlight module. The backlight module provides a light source for the display panel to enable the display panel to display pictures.
The direct type backlight module comprises a substrate, a light source arranged on the substrate and a diffusion plate positioned on the light source. In order to improve the uniformity of the light emitted from the light source, the distance between the light source and the diffuser, i.e., the light mixing distance, is generally set to be larger. However, such a solution would result in a larger thickness of the backlight module, and thus a larger thickness of the display device.
Disclosure of Invention
According to a first aspect of embodiments of the present application, there is provided a backlight module, including:
a substrate;
the diffuse reflection layer is formed on the substrate, and a plurality of accommodating grooves which are arranged at intervals are formed in the diffuse reflection layer;
the side part of the light source and the top part deviating from the substrate can emit light; the number of the light sources is multiple, the light sources are in one-to-one correspondence with the accommodating grooves, and each light source is arranged in the corresponding accommodating groove.
In one embodiment, the backlight module further comprises a protective layer filled in the accommodating groove; the protective layer is doped with scattering particles, and the refractive index of the scattering particles is different from that of the protective layer.
In one embodiment, a surface of the protective layer facing away from the substrate is provided with a groove.
In one embodiment, the number of the grooves is multiple, the grooves correspond to the light sources one by one, and the orthographic projection of the groove on the substrate at least partially overlaps with the orthographic projection of the corresponding light source on the substrate.
In one embodiment, an orthographic projection of the light source on the substrate falls within an orthographic projection of the corresponding groove on the substrate.
In one embodiment, the edges of the longitudinal section of the groove are straight or curved.
In one embodiment, the backlight module further comprises a reflective layer formed between the substrate and the diffuse reflection layer, and an orthogonal projection of the reflective layer on the substrate is adjacent to an orthogonal projection of the plurality of light sources on the substrate.
In one embodiment, a plurality of protrusions are arranged on the groove wall of the accommodating groove at intervals.
In one embodiment, the edge of the longitudinal section of the receiving groove is a straight line or an arc, and the arc is convex toward the light source in the receiving groove or concave away from the light source in the receiving groove.
According to a second aspect of the embodiments of the present application, a display device is provided, where the display device includes a display panel and the backlight module described above, and the display panel is disposed on a side of the backlight module, which is away from the substrate.
The embodiment of the application achieves the main technical effects that:
according to the backlight module and the display device provided by the embodiment of the application, the diffuse reflection layer is provided with the accommodating groove, and light rays emitted by the side part of the light source are reflected or diffusely reflected when being incident to the groove wall of the accommodating groove; and the light reflected by the film layer, such as the diffusion plate, disposed on the side of the diffuse reflection layer away from the substrate will be diffusely reflected when the light is incident on the groove wall of the accommodating groove. Therefore, the diffuse reflection layer can improve the effective utilization rate of light rays emitted by the side parts of the light sources, the brightness of the area between the adjacent light sources is improved, and the distribution uniformity of the light rays of the backlight module is further improved, so that the light mixing distance of the light sources can be reduced, the thickness of the backlight module is reduced, the thickness of a display device where the backlight module is located is further reduced, and the use experience of a user is facilitated to be improved.
Drawings
Fig. 1 is a schematic structural diagram of a backlight module according to an exemplary embodiment of the present disclosure;
fig. 2 is a top view of a backlight module according to an exemplary embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of another backlight module according to an exemplary embodiment of the present application;
fig. 4 is a schematic structural diagram of another backlight module according to an exemplary embodiment of the present application;
fig. 5 is a schematic structural diagram of another backlight module according to an exemplary embodiment of the present application;
fig. 6 is a schematic structural diagram of another backlight module according to an exemplary embodiment of the present application;
fig. 7 is a schematic structural diagram of another backlight module according to an exemplary embodiment of the present application;
FIG. 8 is a schematic view illustrating light propagation in a backlight module according to an exemplary embodiment of the present disclosure;
FIG. 9 is a schematic view illustrating light propagation in a backlight module according to an exemplary embodiment of the present disclosure;
fig. 10 is a schematic partial structure diagram of another backlight module according to an exemplary embodiment of the present application;
fig. 11 is a schematic partial structure diagram of another backlight module according to an exemplary embodiment of the present disclosure;
fig. 12 is a schematic partial structure diagram of another backlight module according to an exemplary embodiment of the present disclosure;
FIG. 13 is a schematic view of an intermediate structure obtained in the process of manufacturing a backlight module according to an exemplary embodiment of the present application;
FIG. 14 is a schematic view of another intermediate structure obtained in the process of preparing a backlight module according to an exemplary embodiment of the present application;
FIG. 15 is a schematic view of another intermediate structure obtained in the process of manufacturing a backlight module according to an exemplary embodiment of the present application;
fig. 16 is a schematic view of another intermediate structure obtained in the process of manufacturing a backlight module according to an exemplary embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
In the embodiment of the present application, for convenience of description, the up-down direction is determined by defining the direction from the substrate to the diffuse reflection layer as up and defining the direction from the diffuse reflection layer to the substrate as down. It is easy to understand that the different direction definitions do not affect the actual operation of the process and the actual shape of the product.
The backlight module provided by the embodiment of the application can be used for display equipment. The backlight module provides sufficient and evenly distributed light sources for the display panel, so that the display panel of the display equipment can display pictures.
Referring to fig. 1 to 7, the backlight module provided in the embodiment of the present disclosure includes a substrate 10, a diffusive reflective layer 20, and a light source 30. The diffuse reflection layer 20 is formed on the substrate 10, and a plurality of accommodating grooves (not numbered) are formed in the diffuse reflection layer 20 at intervals. Light can be emitted from both the side of the light source 30 and the top facing away from the substrate 10. The number of the light sources 30 is plural, the plurality of light sources 30 correspond to the plurality of accommodating grooves one to one, and each light source 30 is disposed in the corresponding accommodating groove.
In one embodiment, as shown in fig. 1, the backlight module further includes a diffuser plate 50 disposed on a side of the diffuse reflection layer 20 away from the substrate 10, and the diffuser plate 50 can further improve uniformity of light. The backlight module may further include a prism sheet (not shown) disposed on a side of the diffusion plate 50 facing away from the substrate 10.
Referring to fig. 8, light 301 emitted from the side of the light source 30 is reflected or diffusely reflected after being incident on the groove wall 21 of the receiving groove, and light reflected by a component disposed above the diffuse reflection layer 20, such as the diffusion plate 50, is also diffusely reflected when being incident on the groove wall 21 of the receiving groove, so that the light distribution is relatively uniform, thereby improving the uniformity of the light distribution.
In the backlight module provided in the embodiment of the present application, the diffuse reflection layer 20 is formed with the accommodating groove, and light emitted from the side of the light source 30 is reflected or diffusely reflected when entering the groove wall 21 of the accommodating groove; and light reflected by a film layer, such as the diffusion plate 50, disposed on a side of the diffuse reflection layer 20 away from the substrate 10 is diffusely reflected when incident on the groove wall 21 of the receiving groove. Therefore, the diffuse reflection layer 20 can improve the effective utilization rate of light emitted by the side part of the light source 30, improve the brightness of the area between the adjacent light sources 30, and further improve the distribution uniformity of the light of the backlight module, so that the light mixing distance of the light source 30 can be reduced, the thickness of the backlight module is reduced, the thickness of the display equipment where the backlight module is located is reduced, and the use experience of a user is facilitated.
In one embodiment, the Light source 30 may be an LED (Light Emitting Diode) lamp, and the Light source 30 may be a lambertian body. The light source 30 may be a miniLED, so that the display device where the backlight module is located has the advantage of high dynamic range display. The light source 30 may be a cube, and the top surface and four sides of the light source 30 may emit light. In other embodiments, the shape of the light source 30 may be other shapes, such as cylindrical.
In one embodiment, the groove wall 21 of the accommodating groove formed on the diffuse reflection layer 20 is relatively rough, so that light incident on the groove wall 21 of the accommodating groove is diffusely reflected and propagates in different directions.
In one embodiment, as shown in fig. 7, a plurality of protrusions 211 are disposed on the groove wall 21 of the accommodating groove at intervals. The setting of arch 211 can make the diffuse reflection effect of the cell wall 21 of holding tank better to the light that incides to on the cell wall 21 of holding tank disperses more evenly after taking place the diffuse emission, more does benefit to the homogeneity that promotes backlight unit outgoing light. In this embodiment, the diffuse reflection layer 20 may also be made of a material with high reflectivity, and the diffuse reflection effect of the groove wall 21 of the accommodating groove is enhanced by the plurality of protrusions 211 arranged on the side wall 21.
In one embodiment, the edge of the longitudinal section of the receiving groove is a straight line or an arc, and the arc is convex toward the light source in the receiving groove or concave away from the light source in the receiving groove. The edge of the longitudinal section of the receiving groove is also the groove wall 21 of the receiving groove. In the embodiment shown in fig. 1 and 5, the edge of the longitudinal section of the receiving groove is curved, and the curved line is concave in a direction away from the light source 30 in the receiving groove. In the embodiment shown in fig. 3, the edges of the longitudinal section of the receiving groove are curved, and the curved line is convex in a direction approaching the light source 30 in the receiving groove. In the embodiment shown in fig. 4 and 6, the edges of the longitudinal section of the accommodating groove are straight. The longitudinal section of the accommodating groove refers to a section perpendicular to the lamination direction of the backlight module, namely a section in the up-down direction.
The edge of the longitudinal section of the accommodating groove is an arc as shown in fig. 1 and 5, that is, when the edge of the longitudinal section of the accommodating groove is recessed towards the direction away from the light source 30 in the accommodating groove, when the light emitted from the side portion of the light source 30 from the same position enters the side wall 21 of the accommodating groove, the distance between the position where the light enters on the side wall 21 and the side portion of the light source 30 is relatively large, the incident light is diffused at the position of the accommodating groove 21, which is helpful for improving the brightness of the area far away from the light source 30, and is further helpful for improving the uniformity of the light emitted from the backlight module.
In one embodiment, the backlight module further includes a protective layer 40, and the protective layer 40 is filled in the receiving groove of the diffuse reflection layer 20. The protective layer 40 is doped with scattering particles 41, and the refractive index of the scattering particles 41 is different from that of the protective layer 40. With this arrangement, since the refractive indexes of the scattering particles 41 and the protective layer 40 are different, the light is scattered when entering the scattering particles 41, so that the light can be dispersed more uniformly. Wherein the refractive index of the scattering particles 41 may be higher than the refractive index of the protective layer 40.
Referring to fig. 9, by filling the protective layer 40 in the receiving groove of the diffuse reflection layer 20 and doping the protective layer 40 with the scattering particles 41, the light reflected by a film layer, such as the diffusion plate 50, disposed on the side of the diffuse reflection layer 20 away from the substrate 10 is also scattered when entering the scattering particles 41, or the light reflected or scattered by the groove wall 21 of the receiving groove is further scattered when entering the scattering particles 41. It can be known that the arrangement of the scattering particles 41 can further improve the uniformity of the light, and the matching of the scattering particles 41 and the receiving groove can make the uniformity of the light better.
In one embodiment, the light source 30 emits light having a wavelength comparable to the diameter of the scattering particles 41, such that the light may be mie-scattered upon incidence on the scattering particles 41. Of course, in other embodiments, the wavelength of the light emitted from the light source 30 may not correspond to the diameter of the scattering particles 41.
In one embodiment, the surface of the protective layer 40 facing away from the substrate 10 is provided with a recess 42. With this arrangement, among the light beams incident on the groove wall 421 of the groove 42 through the protective layer 40, a part of the light beams can be reflected by the groove 42, and the reflected light beams can be diffused again at the groove wall 21 of the accommodating groove or scattered at the scattering particles 41, so as to improve the uniformity of light distribution.
In one embodiment, the number of the grooves 42 provided on the protective layer 40 is multiple, a plurality of the grooves 42 correspond to a plurality of the light sources 30 one by one, and an orthographic projection of the groove 42 on the substrate 10 at least partially overlaps with an orthographic projection of the light source 30 corresponding to the groove 42 on the substrate 10. With this arrangement, when light emitted from the top of the light source 30 away from the substrate 10 exits, at least part of the light is incident on the walls of the grooves 42 and is reflected, and the reflected light is scattered when incident on the scattering particles 41, or is diffusely reflected when incident on the walls 21 of the grooves and exits from the region between the adjacent light sources 30. It can be seen that the cooperation of the scattering particles 41, the groove walls 21 of the accommodating groove and the grooves 42 can make part of the light emitted from the top of the light source 30 generate scattering or diffuse reflection and exit from the region between the adjacent light sources 30, which can reduce the brightness of the backlight module in the region directly above the light source 30, and improve the brightness of the region between the adjacent light sources 30, which is more helpful to make the brightness of the backlight module consistent.
In one embodiment, the orthographic projection of the light source 30 on the substrate 10 falls within the orthographic projection of the corresponding groove 42 on the substrate 10. The fact that the orthographic projection of the light source 30 on the substrate 10 falls within the orthographic projection of the corresponding groove 42 on the substrate means that the area of the orthographic projection of the light source 30 on the substrate 10 is smaller than that of the orthographic projection of the corresponding groove 42 on the substrate 10, and the orthographic projection of the light source 30 on the substrate 10 is completely covered by the orthographic projection of the corresponding groove 42 on the substrate 10, or the orthographic projection of the light source 30 on the substrate 10 is overlapped with the orthographic projection of the corresponding groove 42 on the substrate 10. So set up, the light of light source 30's top emission everywhere all has some light to take place scattering or diffuse reflection, and then follows the regional outgoing between the adjacent light source 30, more helps promoting the homogeneity that light distributes for backlight unit luminance everywhere is more unanimous.
In one embodiment, referring to fig. 6, 10 and 11, the cross-sectional area of the groove 42 gradually increases in a direction away from the substrate 10. In this manner, light rays emitted from the top of the light source 30 are more favorably reflected at the walls of the grooves 42 when exiting.
In one embodiment, the edges of the longitudinal section of the groove are straight or curved. In the embodiment shown in fig. 1 to 7, the edges of the longitudinal section of the groove 42 are curved and the curve is convex upwards. In the embodiment shown in fig. 10, the edges of the longitudinal section of the groove 42 are in a downwardly concave arc. In the embodiment shown in fig. 11 and 12, the edges of the longitudinal section of the groove 42 are straight.
In one embodiment, where the edges of the longitudinal cross-section of the groove 42 are straight or upwardly convex arcs, the angle between the line connecting the edge of the groove 42 and the bottom of the groove 42 and the horizontal may range from 40 ° to 60 °. With such an arrangement, when the light emitted from the top of the light source 30 passes through the groove 42, the ratio of the amount of the emitted light to the amount reflected by the groove wall of the groove 42 is more appropriate, so that the difference between the brightness of the backlight module right above the light source 30 and the brightness of the side part is smaller.
In one embodiment, a plurality of serrations 422 may be provided within the groove 42. The arrangement of the saw-tooth-shaped protrusions 422 can increase the probability that the light emitted from the top of the light source 30 is reflected after entering the groove 42, which is helpful for the uniformity of the light emitted from the backlight module. Further, the included angle between the sidewall of the sawtooth protrusion 422 and the horizontal plane may range from 40 ° to 60 °, so as to further improve the uniformity of the brightness of the backlight module.
In one embodiment, the backlight module further includes a reflective layer (not shown) formed between the substrate 10 and the diffuse reflection layer 20, and an orthogonal projection of the reflective layer on the substrate is adjacent to an orthogonal projection of each of the light sources on the substrate. With such an arrangement, after the light emitted by the light source 30 is reflected by the film layer disposed above the diffuse reflection layer 20, part of the light may pass through the diffuse reflection layer 20 and propagate toward the substrate 10, and the reflection layer may reflect the light, so that the light enters the protection layer 40 again to be utilized, which is beneficial to improving the utilization rate of the light.
In one embodiment, see fig. 1 to 4, the tops of the groove walls 21 of the two receiving grooves connected are in direct contact. In other embodiments, referring to fig. 5 to 7, the diffuse reflection layer 20 may also be formed with a flat portion 22 between the groove walls 21 of two adjacent receiving grooves. Compared with the solutions of fig. 1 to 4, the solution of forming the flat portion 22 between the groove walls 21 of two adjacent receiving grooves shown in fig. 5 to 7 is easier to implement and the manufacturing process is simpler.
In one embodiment, the recess in the diffusive reflective layer 20 is a through-slot, and the light source 30 is disposed directly on the substrate 10. When manufacturing the backlight module, the light source 30 may be first fixed on the substrate 10, and then the diffuse reflection layer 20 is formed, and finally the protection layer 40 is formed.
In one embodiment, the diffuse reflective layer 20 can be prepared by injection molding. Referring to fig. 13, the mold 60 includes a plurality of protrusions corresponding to the receiving grooves one to one, the size and shape of the protrusions are matched with those of the receiving grooves, and each protrusion is provided with a receiving portion 601 for receiving the light source 30. In the preparation process, firstly, the mold 60 is placed on the substrate 10, the protrusion is abutted against the substrate 10, the light source 30 is accommodated in the accommodating part 601 of the protrusion, and the region to be filled 61 is formed between the side wall of the protrusion and the substrate 10; then filling white glue in the region 61 to be filled; finally, after the white glue is cured, the mold 60 is peeled off, and the diffuse reflection layer 20 with the accommodating groove 201 can be obtained, as shown in fig. 14.
In other embodiments, a scribe-and-paste process may be used in the fabrication of the diffusive reflective layer 20. A plurality of light sources 30 are fixed in the substrate 10 before the diffuse reflection layer 20 is prepared. In the process of preparing the diffuse reflection layer 20, the dispensing head of the dispenser moves at a constant speed by scribing, and white glue is released in the moving process. The dispenser may first scribe in one direction and then scribe in a direction perpendicular to that direction to obtain the diffusive reflective layer 20.
In one embodiment, the protective layer 40 may be prepared using a mold injection molding process. Referring to fig. 15, the mold 70 for preparing the protection layer 40 includes a plurality of bumps 71 extending downward, the plurality of bumps 71 correspond to the plurality of light sources 30 one by one, and the size and shape of the bumps 71 match the size and shape of the grooves 42. When the protective layer 40 is prepared, the mold 70 is first placed on the diffuse reflection layer 20, and the plurality of bumps 71 of the mold 70 are respectively located above the corresponding light sources 30; then, glue doped with scattering particles 41 is injected into the accommodating groove 201, so as to obtain the structure shown in fig. 16; and finally, after the glue is cured, peeling off the mold 70 to obtain the backlight module.
In order to verify the light uniformizing effect of the backlight module provided by the embodiment of the present application, the backlight module shown in fig. 1 and the existing backlight module are simulated by using lighttools software. The difference between the conventional backlight module and the embodiment of the present application is that the conventional backlight module includes a protective film layer formed on the light source 30, no groove is formed on the protective film layer, and the conventional backlight module does not include the diffuse reflection layer 20 and the protective layer 40. Both the conventional backlight module and the backlight module shown in fig. 1 include a single-layer diffusion film, the height between the diffusion film and the light sources 30 is one third of the distance between two adjacent light sources 30, the number of the light sources 30 is twenty-five, the twenty-five light sources 30 are arranged in five rows and five columns, and the transverse dimension of the light sources is 0.25mm by 0.5 mm.
Simulation results show that the luminous flux of the backlight module shown in fig. 1 is 150% of the luminous flux of the conventional backlight module, and the light distribution of the backlight module shown in fig. 1 is more uniform compared with the conventional backlight module. Therefore, the light uniformizing effect and the light utilization rate of the backlight module are obviously improved.
The embodiment of the application also provides a display device, and the display device comprises the backlight module in any one of the embodiments.
The display apparatus may further include a display panel, which may be a liquid crystal display panel. The display panel is arranged on one side of the backlight module, which is deviated from the substrate. The display device may further include a housing, and the backlight module is fixed to the housing.
The display device in this embodiment may be: any product or component with a display function, such as electronic paper, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator and the like.
It is noted that in the drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Also, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or layer or intervening layers may also be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may also be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intermediate layer or element may also be present. Like reference numerals refer to like elements throughout.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. A backlight module is characterized in that the backlight module comprises:
a substrate;
the diffuse reflection layer is formed on the substrate, and a plurality of accommodating grooves which are arranged at intervals are formed in the diffuse reflection layer;
the side part of the light source and the top part deviating from the substrate can emit light; the number of the light sources is multiple, the light sources are in one-to-one correspondence with the accommodating grooves, and each light source is arranged in the corresponding accommodating groove.
2. The backlight module according to claim 1, further comprising a protection layer filled in the accommodating groove; the protective layer is doped with scattering particles, and the refractive index of the scattering particles is different from that of the protective layer.
3. A backlight module according to claim 2, wherein the surface of the protective layer facing away from the substrate is provided with grooves.
4. The backlight module according to claim 3, wherein the number of the grooves is plural, a plurality of the grooves correspond to a plurality of the light sources one by one, and an orthogonal projection of the groove on the substrate at least partially overlaps an orthogonal projection of the corresponding light source on the substrate.
5. The backlight module according to claim 4, wherein an orthogonal projection of the light source on the substrate falls within an orthogonal projection of the corresponding groove on the substrate.
6. A backlight module according to claim 3, wherein the edges of the longitudinal cross-section of the grooves are straight or curved.
7. The backlight module according to claim 1, further comprising a reflective layer formed between the substrate and the diffuse reflective layer, wherein an orthographic projection of the reflective layer on the substrate is adjacent to an orthographic projection of the plurality of light sources on the substrate.
8. The backlight module as claimed in claim 1, wherein a plurality of protrusions are disposed on a wall of the receiving groove.
9. The backlight module of claim 1, wherein the edge of the longitudinal cross section of the receiving cavity is a straight line or an arc, and the arc is convex toward the light source in the receiving cavity or concave away from the light source in the receiving cavity.
10. A display device, comprising a display panel and the backlight module as claimed in any one of claims 1 to 9, wherein the display panel is disposed on a side of the backlight module facing away from the substrate.
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| CN201911309210.8A CN110967871B (en) | 2019-12-18 | 2019-12-18 | Backlight module and display device |
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| CN201911309210.8A CN110967871B (en) | 2019-12-18 | 2019-12-18 | Backlight module and display device |
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| CN110967871B CN110967871B (en) | 2023-08-08 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111524471A (en) * | 2020-04-29 | 2020-08-11 | 京东方科技集团股份有限公司 | Substrate and manufacturing method thereof |
| CN112542102A (en) * | 2020-12-22 | 2021-03-23 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Backlight module and preparation method thereof |
| CN113470524A (en) * | 2021-06-28 | 2021-10-01 | 合肥维信诺科技有限公司 | Flexible cover plate and flexible display module thereof |
| TWI743830B (en) * | 2020-06-12 | 2021-10-21 | 佳世達科技股份有限公司 | Light source module |
| CN115064069A (en) * | 2022-06-20 | 2022-09-16 | Tcl华星光电技术有限公司 | Backlight module, manufacturing method thereof and display device |
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| CN112542102A (en) * | 2020-12-22 | 2021-03-23 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Backlight module and preparation method thereof |
| CN113470524A (en) * | 2021-06-28 | 2021-10-01 | 合肥维信诺科技有限公司 | Flexible cover plate and flexible display module thereof |
| CN115064069A (en) * | 2022-06-20 | 2022-09-16 | Tcl华星光电技术有限公司 | Backlight module, manufacturing method thereof and display device |
| CN115064069B (en) * | 2022-06-20 | 2023-12-08 | Tcl华星光电技术有限公司 | Backlight module, manufacturing method thereof and display device |
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