CN114019720A

CN114019720A - Backlight module and display device

Info

Publication number: CN114019720A
Application number: CN202111296299.6A
Authority: CN
Inventors: 邓天应; 王代青; 刘金龙; 蒋冲
Original assignee: Huizhou Shiwei New Technology Co Ltd
Current assignee: Huizhou Shiwei New Technology Co Ltd
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-02-08
Anticipated expiration: 2041-11-03
Also published as: CN114019720B

Abstract

The embodiment of the application provides a backlight module and a display device. The embodiment of the application provides a backlight unit, surface through the primary lens at light emitting device sets up a plurality of first microstructures, and/or, it includes the different second printing opacity rete of a plurality of refracting indexes to set up primary lens, can utilize the different second printing opacity rete realization light of first microstructure and/or a plurality of refracting indexes, make light emitting device's light-emitting more even, when light emitting device's light-emitting is comparatively even, backlight unit can realize the homogeneity of light-emitting under less mixed light distance, thereby can reduce backlight unit's thickness, and then realize display device's frivolousization design.

Description

Backlight module and display device

Technical Field

The application relates to the technical field of display, in particular to a backlight module and a display device.

Background

With the development of display technology, the display devices are gradually becoming thinner and lighter. The conventional display device generally includes a housing, a display panel, a middle frame, a backlight module and the like, wherein the display panel, the middle frame, the backlight module and the like are fixedly accommodated in the housing, and the thickness of the backlight module is one of the key factors for determining the thickness of the display device.

The conventional backlight module is usually provided with a longer light mixing distance for obtaining a more uniform light emitting effect, so that the backlight module has a larger thickness, which is not favorable for the light and thin design of the display device.

Disclosure of Invention

The embodiment of the application provides a backlight module and a display device, the thickness of the backlight module is small, and the light and thin design of the display device is favorably realized.

In a first aspect, an embodiment of the present application provides a backlight module, including:

the light source comprises a plurality of light-emitting devices, each light-emitting device comprises a light-emitting element and a primary lens, and the primary lens is wrapped on the outer surface of the light-emitting element;

the primary lens comprises a plurality of first light-transmitting film layers which are arranged in a stacked mode, and the refractive index of the first light-transmitting film layers is gradually reduced in the direction from one side, facing the light-emitting element, of the primary lens to the side, facing away from the light-emitting element, of the primary lens.

In some embodiments, the light emitting device further comprises a secondary lens disposed on a side of the primary lens facing away from the light emitting element, and a space is disposed between the secondary lens and the primary lens;

the surface of one side of the secondary lens, which deviates from the primary lens, is provided with a plurality of second microstructures, and/or the secondary lens comprises a plurality of second light-transmitting film layers which are stacked, and the refractive indexes of the second light-transmitting film layers are different.

In some embodiments, the refractive index of the second light-transmitting film layers is gradually decreased or gradually increased in a direction from a side of the secondary lens facing the primary lens to a side of the secondary lens facing away from the primary lens.

In some embodiments, the backlight module further includes a diffusion plate disposed on a light emitting side of the light source, the diffusion plate includes a plurality of diffusion layers stacked one on another, and refractive indexes of the plurality of diffusion layers are different from each other; and/or

A plurality of third microstructures are arranged on the surface of one side, which is far away from the light source, of the diffusion plate; and/or

The diffusion plate contains a plurality of bubbles inside.

In some embodiments, the refractive index of the plurality of diffusion layers gradually decreases or gradually increases in a direction from a side of the diffusion plate facing the light source to a side of the diffusion plate facing away from the light source.

In some embodiments, the backlight module further comprises a back plate, wherein the back plate comprises a bottom plate and a plurality of side plates connected with the bottom plate;

the light source comprises a plurality of light bars arranged at intervals, and the plurality of light bars are all arranged on the bottom plate;

the lamp strip includes the circuit board and set up in on the circuit board and in proper order interval arrangement a plurality of luminescent device.

In some embodiments, the first reflective sheet includes a first arc-shaped portion that protrudes toward a direction away from the base plate; and/or

The second reflection sheet includes a second arc portion protruding toward a direction close to the base plate.

In some embodiments, a plurality of first reflective sheets and a plurality of second reflective sheets are further disposed on the bottom plate, the plurality of first reflective sheets are respectively disposed in the spacing areas between the plurality of light bars, and the second reflective sheets cover the side plates and the areas, located between the connection positions of the side plates and the bottom plate and the outermost light bars, on the bottom plate.

In some embodiments, the backlight module further includes a diffusion plate disposed on a light exit side of the light source, the diffusion plate includes a plurality of arc structures connected in sequence, the plurality of arc structures are respectively disposed corresponding to the plurality of light bars, and the arc structures protrude toward a direction away from the bottom plate; or

The diffuser plate all is provided with the waist including a plurality of main parts that arrange in proper order between two arbitrary adjacent main parts, two adjacent main parts are connected to the waist, the thickness of main part is greater than the thickness of waist, the waist corresponds the lamp strip sets up, and the orientation on the waist one side of lamp strip is equipped with the recess.

In a second aspect, an embodiment of the present application further provides a display device, including the backlight module described above.

The embodiment of the application provides a backlight unit, surface through the primary lens at light emitting device sets up a plurality of first microstructures, and/or, it includes the different second printing opacity rete of a plurality of refracting indexes to set up primary lens, can utilize the different second printing opacity rete realization light of first microstructure and/or a plurality of refracting indexes, make light emitting device's light-emitting more even, when light emitting device's light-emitting is comparatively even, backlight unit can realize the homogeneity of light-emitting under less mixed light distance, thereby can reduce backlight unit's thickness, and then realize display device's frivolousization design.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic view of a first structure of a backlight module according to an embodiment of the present disclosure.

Fig. 2 is a schematic view of a first structure of a light emitting device provided in an embodiment of the present application.

Fig. 3 is a schematic view of a second structure of a light emitting device provided in an embodiment of the present application.

Fig. 4 is a schematic view of a first structure of a diffusion plate according to an embodiment of the present disclosure.

Fig. 5 is a schematic view of a second structure of a diffuser plate according to an embodiment of the present disclosure.

Fig. 6 is a schematic view of a third structure of a diffuser plate according to an embodiment of the present disclosure.

Fig. 7 is a schematic diagram of a fourth structure of a diffuser plate according to an embodiment of the present application.

Fig. 8 is a schematic view of a fifth structure of a diffuser plate according to an embodiment of the present disclosure.

Fig. 9 is a schematic view of a second structure of a backlight module according to an embodiment of the present disclosure.

Fig. 10 is a schematic view of a third structure of a backlight module according to an embodiment of the present application.

Fig. 11 is a schematic diagram of a fourth structure of the backlight module according to the embodiment of the present application.

Fig. 12 is a schematic view of a fifth structure of a backlight module according to an embodiment of the present disclosure.

Fig. 13 is a schematic view of a sixth structure of a backlight module according to an embodiment of the present disclosure.

Fig. 14 is a schematic view of a seventh structure of a backlight module according to an embodiment of the present disclosure.

Fig. 15 is an eighth structural schematic diagram of a backlight module according to an embodiment of the present application.

Fig. 16 is a schematic view of a ninth structure of a backlight module according to an embodiment of the present application.

Fig. 17 is a schematic diagram of a tenth structure of a backlight module according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 to 3, fig. 1 is a first structural schematic diagram of a backlight module according to an embodiment of the present disclosure, fig. 2 is a first structural schematic diagram of a light emitting device according to an embodiment of the present disclosure, and fig. 3 is a second structural schematic diagram of the light emitting device according to an embodiment of the present disclosure. The embodiment of the present application provides a backlight module 100, which includes a light source, the light source includes a plurality of light emitting devices 11, the light emitting devices 11 include a light emitting element 110 and a primary lens 111, and the primary lens 111 is wrapped on an outer surface of the light emitting element 110.

Referring to fig. 2, the primary lens 111 may include a plurality of first light-transmitting film layers 102 stacked one on another, and the refractive index of the plurality of first light-transmitting film layers 102 is gradually decreased in a direction from a side of the primary lens 111 facing the light-emitting element 110 to a side of the primary lens 111 facing away from the light-emitting element 110.

In any embodiment of the present application, a plurality means two or more, for example, three, four, five, six, seven, eight, and the like.

Referring to fig. 3, a plurality of first microstructures 103 may be disposed on a surface of the primary lens 111 facing away from the light emitting element 110.

Exemplarily, the Light Emitting element 110 may be an LED (Light Emitting Diode) chip.

Illustratively, the primary lens 111 may be an encapsulation paste.

Referring to fig. 3, it can be understood that, in the technical scheme that the surface of the primary lens 111 on the side away from the light emitting element 110 is provided with a plurality of first microstructures 103, the surface of the primary lens 111 on the side away from the light emitting element 110 is a light emitting surface of the primary lens 111, and when the light emitting surface of the primary lens 111 is provided with a plurality of first microstructures 103, the first microstructures 103 can diffuse light, so that the emitted light of the light emitting device 11 is more uniform, and when the light emitting effect of the light emitting device 11 is more uniform, the light mixing distance of the backlight module 100 can be appropriately reduced, so as to reduce the thickness of the backlight module 100, and further implement the light and thin design of the display device.

For example, the first microstructures 103 may include concave portions and/or convex portions, the convex portions may be arc-shaped protrusions or cone-shaped protrusions, and the concave portions may be arc-shaped grooves or cone-shaped grooves.

Referring to fig. 2, in view of the technical scheme that the primary lens 111 includes the plurality of first light-transmitting film layers 102 arranged in a stacked manner, and the refractive indexes of the plurality of first light-transmitting film layers 102 are gradually reduced in the direction from the side of the primary lens 111 facing the light-emitting element 110 to the side of the primary lens 111 away from the light-emitting element 110, it can be understood that when the refractive indexes of the plurality of first light-transmitting film layers 102 are gradually reduced, the plurality of first light-transmitting film layers 102 can gradually expand the emission angle range of the emergent light of the light-emitting device 11, so that the emergent light of the light-emitting device 11 is more uniform, and when the emergent light effect of the light-emitting device 11 is more uniform, the light-mixing distance of the backlight module 100 can be properly reduced, thereby reducing the thickness of the backlight module 100, and further implementing the light-thinning design of the display device.

In some embodiments, when the backlight module 100 has a thinner thickness by improving other structures besides the primary lens 111, at this time, the refractive indexes of the first light-transmitting film layers 102 may be gradually increased in a direction from a side of the primary lens 111 facing the light-emitting element 110 to a side of the secondary lens 112 facing away from the light-emitting element 110, and it should be noted that when the refractive indexes of the first light-transmitting film layers 102 are gradually increased, the brightness of the light transmitted from the primary lens 111 may be increased, so as to enhance the light-emitting brightness of the backlight module 100, thereby improving the display effect of the display device.

It should be noted that, when the surface of the primary lens 111 on the side away from the light emitting element 110 is provided with a plurality of first microstructures 103, the material of the primary lens 111 may be a single material, that is, the refractive index of all regions on the primary lens 111 is the same. Alternatively, the primary lens 111 may also have a structure that the primary lens 111 includes a plurality of first light-transmitting film layers 102 stacked together, and the first microstructures 103 are disposed on the outer surface of the outermost first light-transmitting film layer 102, and the first microstructures 103 may diffuse light, so that the light emitted from the light-emitting surface of the primary lens 111 is more uniform.

Referring to fig. 2 and fig. 3, the light emitting device 11 may further include a secondary lens 112, the secondary lens 112 is disposed on a side of the primary lens 111 away from the light emitting element 110, and a space is disposed between the secondary lens 112 and the primary lens 111.

Referring to fig. 2, the secondary lens 112 may include a plurality of second light-transmitting film layers 104 stacked one on another, and refractive indexes of the plurality of second light-transmitting film layers 104 are different from each other. It is understood that by disposing the plurality of second light-transmitting film layers 104 with different refractive indexes, the secondary lens 112 can achieve a better balance between the uniformity of the emitted light and the brightness of the emitted light.

Referring to fig. 3, a plurality of second microstructures 105 may be disposed on a surface of the secondary lens 112 facing away from the primary lens 111.

Note that the refractive index of the plurality of second light-transmitting film layers 104 may be set to gradually decrease or set to gradually increase in a direction from a side of the secondary lens 112 facing the primary lens 111 to a side of the secondary lens 112 facing away from the primary lens 111.

To the technical solution that the refractive indexes of the second transparent films 104 are gradually decreased in the direction from the secondary lens 112 toward the side of the primary lens 111 to the side of the secondary lens 112 away from the primary lens 111, it can be understood that when the refractive indexes of the second transparent films 104 are gradually decreased, the second transparent films 104 can gradually expand the emission angle range of the emergent light of the light emitting device 11, so that the emergent light of the light emitting device 11 is more uniform, and when the emergent light effect of the light emitting device 11 is more uniform, the light mixing distance of the backlight module 100 can be properly reduced, thereby reducing the thickness of the backlight module 100, and further realizing the light and thin design of the display device.

In some embodiments, when the backlight module 100 can have a thinner thickness by modifying other structures besides the secondary lens 112, the refractive index of the second light-transmitting film layers 104 can be gradually increased from the side of the secondary lens 112 facing the primary lens 111 to the side of the secondary lens 112 facing away from the primary lens 111. When the refractive index of the second light-transmitting film layers 104 is gradually increased, the brightness of the light rays transmitted from the secondary lens 112 can be increased, and the light-emitting brightness of the backlight module 100 is further enhanced, so that the display effect of the display device is improved.

For example, the second microstructures 105 may include concave portions and/or convex portions, the convex portions may be arc-shaped protrusions or cone-shaped protrusions, and the concave portions may be arc-shaped grooves or cone-shaped grooves.

When the surface of the secondary lens 112 on the side away from the primary lens 111 is provided with a plurality of second microstructures 105, the material of the secondary lens 112 may be a single material, i.e. the refractive index of all regions on the secondary lens 112 is the same. Alternatively, the secondary lens 112 may have a structure, where the secondary lens 112 includes a plurality of second light-transmitting film layers 104 stacked together, and the second microstructure 105 is disposed on the outer surface of the outermost second light-transmitting film layer 104, and the second microstructure 105 may diffuse light, so that the light emitted from the light-emitting surface of the secondary lens 112 is more uniform.

Referring to fig. 1, the backlight module 100 may further include a diffuser 20, and the diffuser 20 is disposed on the light emitting side of the light source.

Referring to fig. 4, fig. 4 is a first structural schematic view of a diffuser plate according to an embodiment of the present disclosure. The diffusion plate 20 may include a plurality of diffusion layers 21 stacked, and the plurality of diffusion layers 21 may have different refractive indexes. It is understood that by providing a plurality of diffusion layers 21 with different refractive indices, the diffusion plate 20 can achieve a better balance between uniformity of light output and brightness of light output.

Referring to fig. 4, the refractive indices of the plurality of diffusion layers 21 may be set to gradually decrease or to gradually increase in a direction from a side of the diffusion plate 20 toward the light source to a side of the diffusion plate 20 away from the light source.

Aiming at the technical scheme that the refractive indexes of the diffusion layers 21 are gradually reduced in the direction from one side of the diffusion plate 20 facing the light source to one side of the diffusion plate 20 deviating from the light source, it can be understood that when the refractive indexes of the diffusion layers 21 are gradually reduced, the diffusion layers 21 can gradually expand the emission angle range of emergent light, so that the emergent light of the diffusion plate 20 is more uniform, and at the moment, the light mixing distance of the backlight module 100 can be properly reduced, so that the thickness of the backlight module 100 is reduced, and the light and thin design of the display device is realized.

In some embodiments, when the backlight module 100 has a thinner thickness by improving other structures besides the diffusion plate 20, at this time, the diffusion layers 21 may also be arranged in a direction from a side of the diffusion plate 20 facing the light source to a side of the diffusion plate 20 away from the light source, the refractive indexes of the diffusion layers 21 are gradually increased, and when the refractive indexes of the diffusion layers 21 are gradually increased, the brightness of the light emitted from the diffusion plate 20 is enhanced, so as to enhance the light emitting brightness of the backlight module 100, thereby improving the display effect of the display device.

Referring to fig. 5, fig. 5 is a schematic view illustrating a second structure of a diffuser plate according to an embodiment of the present disclosure. A plurality of third microstructures 23 may be provided on the surface of the diffuser plate 20 facing away from the light source.

To the technical solution that the surface of the diffusion plate 20 on the side away from the light source is provided with the plurality of third microstructures 23, it can be understood that the surface of the diffusion plate 20 on the side away from the light source is the light emitting surface of the diffusion plate 20, and when the surface of the diffusion plate 20 on the side away from the light source is provided with the plurality of third microstructures 23, the third microstructures 23 can play a role of diffusing light, so that the light emitting of the diffusion plate 20 is more uniform.

For example, the third microstructure 23 may include a concave portion and/or a convex portion, the convex portion may be an arc-shaped protrusion or a cone-shaped protrusion, and the concave portion may be an arc-shaped groove or a cone-shaped groove.

It should be noted that, when the surface of the diffusion plate 20 on the side away from the light source is provided with a plurality of third microstructures 23, the material of the diffusion plate 20 may be a single material, that is, the refractive index of all regions on the diffusion plate 20 is the same. Alternatively, the diffusion plate 20 may have a structure in which the diffusion plate 20 includes a plurality of diffusion layers 21 stacked one on another, and the third microstructures 23 are disposed on the outer surface of the outermost diffusion layer 21, and the third microstructures 23 may diffuse light, so that the light emitted from the light emitting surface of the diffusion plate 20 is more uniform.

Referring to fig. 6, fig. 6 is a schematic view illustrating a third structure of a diffuser plate according to an embodiment of the present disclosure. The diffusion plate 20 contains a plurality of air bubbles 22 therein.

In view of the scheme that the diffusion plate 20 includes a plurality of bubbles 22, it can be understood that the bubbles 22 can function as diffusing particles, so that the light emitted from the diffusion plate 20 is more uniform, and on the basis, the thickness of the backlight module 100 can be reduced appropriately, so that the display device using the backlight module 100 is more light and thin.

Illustratively, the gas in the bubbles 22 may be air, but may also be other gases, such as inert gases, etc.

Illustratively, the plurality of air bubbles 22 are uniformly distributed inside the diffusion plate 20.

In some embodiments, the diffusion plate 20 may also have a structure in which the diffusion plate 20 includes a plurality of diffusion layers 21 stacked one on another, the plurality of diffusion layers 21 have different refractive indexes (e.g., gradually increase or gradually decrease in a certain direction), each diffusion layer 21 includes a plurality of air bubbles 22, and the outer surface of the outermost diffusion layer 21 is provided with a plurality of third microstructures 23.

Referring to fig. 1, the backlight module 100 may further include a back plate 40, where the back plate 40 includes a bottom plate 41 and a plurality of side plates 42 connected to the bottom plate 41. The light source may include a plurality of light bars 10 arranged at intervals, and the plurality of light bars 10 are all arranged on the bottom plate 41. The light bar 10 includes a circuit board 120 and a plurality of light emitting devices 11 disposed on the circuit board 120 and arranged at intervals in sequence.

Referring to fig. 7, fig. 7 is a schematic diagram illustrating a fourth structure of a diffuser plate according to an embodiment of the present disclosure. The diffusion plate 20 may include a plurality of arc structures 24 connected in sequence, in the backlight module 100, the plurality of arc structures 24 are respectively disposed corresponding to the plurality of light bars 10, and the arc structures 24 protrude toward a direction away from the bottom plate 41.

Referring to fig. 8, fig. 8 is a schematic view illustrating a fifth structure of a diffuser plate according to an embodiment of the present disclosure. The diffusion plate 20 may include a plurality of main body portions 25 arranged in sequence, a waist portion 26 is disposed between any two adjacent main body portions 25, the waist portion 26 connects the two adjacent main body portions 25, the thickness of the main body portion 25 is greater than that of the waist portion 26, the waist portion 26 is disposed corresponding to the light bar 10, and a groove is disposed on one side of the waist portion 26 facing the light bar 10.

Referring to fig. 9 and 10, fig. 9 is a second structural schematic diagram of the backlight module according to the embodiment of the present application, and fig. 10 is a third structural schematic diagram of the backlight module according to the embodiment of the present application. To "diffuser plate 20 includes the technical scheme of a plurality of arc structure 24 that link to each other in proper order", can understand, because a plurality of arc structure 24 correspond a plurality of lamp strips 10 setting respectively, and arc structure 24 is protruding towards the direction of keeping away from bottom plate 41, when the light that lamp strip 10 sent is incident to arc structure 24, arc structure 24 can be diffused the light of incidence, improve "the regional luminance height of corresponding lamp strip 10 on the diffuser plate 20, the regional weak condition of luminance of interval between the adjacent lamp strip 10", improve diffuser plate 20's light-emitting homogeneity.

Referring to fig. 11 and 12, fig. 11 is a fourth structural schematic diagram of the backlight module according to the embodiment of the present application, and fig. 12 is a fifth structural schematic diagram of the backlight module according to the embodiment of the present application. As for the technical solution that the diffusion plate 20 includes the plurality of main body portions 25 and the plurality of waist portions 26 ", it can be understood that, since the waist portions 26 are disposed corresponding to the light bars 10 and the recess is disposed on one side of the waist portions 26 facing the light bars 10, when the light emitted from the light bars 10 enters the waist portions 26, the waist portions 26 can diffuse the incident light, and the conditions that" the brightness of the region corresponding to the light bars 10 on the diffusion plate 20 is high and the brightness of the region corresponding to the space between the adjacent light bars 10 is weak "are improved, and the uniformity of the light emitted from the diffusion plate 20 is improved.

Referring to fig. 1, a plurality of first reflective sheets 31 and a plurality of second reflective sheets 32 may be further disposed on the bottom plate 41, the plurality of first reflective sheets 31 are respectively disposed in the spacing regions between the plurality of light bars 10, and the second reflective sheets 32 cover the side plates 42 and the regions of the bottom plate 41 between the connection positions of the side plates 42 and the bottom plate 41 and the outermost light bars 10.

Referring to fig. 13 to 16, fig. 13 is a sixth structural schematic diagram of the backlight module according to the embodiment of the present application, fig. 14 is a seventh structural schematic diagram of the backlight module according to the embodiment of the present application, fig. 15 is an eighth structural schematic diagram of the backlight module according to the embodiment of the present application, and fig. 16 is a ninth structural schematic diagram of the backlight module according to the embodiment of the present application. The first reflection sheet 31 may include a first arc-shaped portion protruding toward a direction away from the bottom plate 41; the second reflection sheet 32 may include a second arc-shaped portion protruding toward a direction close to the base plate 41.

It can be understood that, when the first reflection sheet 31 includes the first arc-shaped portion, and the first arc-shaped portion protrudes toward a direction away from the bottom plate 41, since the exit angles of the reflected light formed by different areas of the surface of the first arc-shaped portion are different when the incident light with the same angle is irradiated to the surface of the first arc-shaped portion, that is, compared with the planar first reflection sheet 31, the exit angles of the light reflected by the first reflection sheet 31 with the first arc-shaped portion are more, so that the light emitted by the backlight module 100 can be more uniform.

It can be understood that, compared with the technical solution that "the second reflection sheet 32 can also include a horizontal portion attached to the bottom plate 41 and a side portion attached to the side plate 42, when the second reflection sheet 32 includes a second arc portion, the second arc portion protrudes toward the direction close to the bottom plate 41, because the angles of the emergent rays formed after the rays with the same incident angle are reflected by different regions on the second arc portion are different, it is more favorable for increasing the light-emitting angle of the rays reflected from the second reflection sheet 32, and further the light-emitting of the backlight module 100 is more uniform.

For example, the first arc portion may be the entire region of the first reflection sheet 31 (as shown in fig. 13 and 14), or the first arc portion may be a partial region of the first reflection sheet 31 (as shown in fig. 15 and 16). Referring to fig. 15 and 16, when the first arc-shaped portion is a partial region of the first reflection sheet 31, the first reflection sheet 31 may include a first arc-shaped portion and plane portions located at two sides of the first arc-shaped portion.

For example, the second arc-shaped portion may be a partial region or a whole region of the second reflection sheet 32 (as shown in fig. 13 to 16), and when the second arc-shaped portion is a partial region of the second reflection sheet 32, the second reflection sheet 32 may include the second arc-shaped portion and planar portions at both sides of the second arc-shaped portion.

It can be understood that, when the "first reflective sheet 31 has the first arc-shaped portion" and/or the "second reflective sheet 32 has the second arc-shaped portion", since the first reflective sheet 31 and/or the second reflective sheet 32 can reflect the emitted light of the light emitting devices 11 on the light bar 10, so that the light emitted from the light source is more uniform, when the light bar 10 is designed, the length of the spacing region between the adjacent light emitting devices 11 can be properly increased, thereby reducing the number of the light emitting devices 11 mounted on the light bar 10, and further saving the production cost.

For example, the first reflective sheet 31 having the first arc-shaped portion and the second reflective sheet 32 having the second arc-shaped portion may be prepared by a plastic uptake process, and the first reflective sheet 31 and the second reflective sheet 32 may be assembled automatically, thereby saving the cost of product assembly.

Referring to fig. 17, fig. 17 is a schematic view of a tenth structure of a backlight module according to an embodiment of the present disclosure. The second reflection sheet 32 may include a horizontal portion attached to the bottom plate 41 and a side portion attached to the side plate 42.

Referring to fig. 1 and 9 to 17, the backlight module 100 may further include an optical film 30, and the optical film 30 is disposed on a side of the diffusion plate 20 away from the light source.

Illustratively, the optical film sheet 30 may include one or more of a brightness enhancement film, a diffuser film.

The backlight module 100 provided in any embodiment of the present application can achieve an OD value (light mixing distance from the surface of the light incident surface of the diffuser plate 20 to the surface of the reflector plate) of 20mm to 25mm, and compared with the existing backlight module with an OD value of 30mm to 35mm, the OD value of the backlight module 100 is greatly reduced, that is, the thickness of the backlight module 100 is reduced, thereby being beneficial to achieving the light and thin design of the display device. In addition, compared with the existing backlight module with an OD value of 30mm to 35mm, the backlight module 100 of the embodiment of the present application does not increase the production cost, and thus has a higher cost performance.

The embodiment of the present application further provides a display device, which includes the backlight module 100 in any of the above embodiments.

It is understood that the display device may further include a display panel, and the backlight module 100 is disposed on the light incident side of the display panel.

Illustratively, the display device may be a liquid crystal display device, and the display panel may be a liquid crystal display panel.

From actual product, display device can be TV, computer display, cell-phone, panel computer, wearable equipment etc. and wherein wearable equipment can be intelligent bracelet, intelligent glasses, intelligent wrist-watch, intelligent decoration etc..

The backlight module and the display device provided by the embodiment of the application are described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A backlight module, comprising:

2. The backlight module according to claim 1, wherein the light emitting device further comprises a secondary lens disposed on a side of the primary lens facing away from the light emitting element, and a space is provided between the secondary lens and the primary lens;

3. The backlight module according to claim 2, wherein the refractive index of the second light-transmissive film layers is gradually decreased or gradually increased in a direction from a side of the secondary lens facing the primary lens to a side of the secondary lens facing away from the primary lens.

4. The backlight module according to claim 1, further comprising a diffuser plate disposed on a light emitting side of the light source, wherein the diffuser plate comprises a plurality of diffusion layers stacked one on another, and refractive indices of the plurality of diffusion layers are different from each other; and/or

The diffusion plate contains a plurality of bubbles inside.

5. A backlight module according to claim 4, wherein the plurality of diffusion layers have refractive indices that gradually decrease or gradually increase in a direction from a side of the diffusion plate facing the light source to a side of the diffusion plate facing away from the light source.

6. The backlight module according to claim 1, further comprising a back plate, wherein the back plate comprises a bottom plate and a plurality of side plates connected to the bottom plate;

7. The backlight module as claimed in claim 6, wherein the bottom plate further comprises a plurality of first reflective sheets and a plurality of second reflective sheets, the plurality of first reflective sheets are respectively disposed in the spacing regions between the plurality of light bars, and the second reflective sheets cover the side plates and the regions of the bottom plate between the connection positions of the side plates and the bottom plate and the outermost light bars.

8. The backlight module according to claim 7, wherein the first reflective sheet comprises a first arc-shaped portion, and the first arc-shaped portion protrudes in a direction away from the bottom plate; and/or

9. The backlight module according to claim 6, further comprising a diffuser plate disposed on a light emitting side of the light source, wherein the diffuser plate comprises a plurality of arc structures connected in sequence, the plurality of arc structures are respectively disposed corresponding to the plurality of light bars, and the arc structures protrude in a direction away from the bottom plate; or

10. A display device comprising a backlight module according to any one of claims 1-9.