CN111830745A - Backlight module and display device - Google Patents

Abstract

A backlight module comprises a back plate, a light emitting element, a first reflecting mechanism and a second reflecting mechanism. The back plate has a reflective bottom surface. The light emitting element is arranged on the back plate and used for providing a first light beam and a second light beam. The first reflection mechanism and the second reflection mechanism are respectively arranged on the reflection bottom surface and are positioned on two opposite sides of the light-emitting element. A light outlet is arranged between the first reflection mechanism and the second reflection mechanism, and the first light beam from the light-emitting element directly passes through the light outlet. The first reflection mechanism and the second reflection mechanism are respectively provided with a first reflection surface facing the reflection bottom surface. The first reflecting surface, the reflecting bottom surface and the light outlet of the first reflecting mechanism are arranged on a transmission path of the second light beam from the light-emitting element. A display device using the backlight module is also provided. The backlight module and the display device have the effect of good light mixing effect.

Description

Backlight module and display device

technical field

The present invention relates to a backlight module and a display device, and more particularly, to a direct type backlight module and a display device.

Background technique

Existing direct-lit backlight modules that use light-emitting diodes (LEDs) as light sources, because the efficiency of LEDs improves with the advancement of technology, a smaller number of LEDs can be used to achieve the desired level of direct-lit backlight modules. Provide the required optical brightness. However, due to the reduction in the number of LEDs used and the limitation that the thickness of the direct type backlight module should not be too thick, the problem of uneven brightness and darkness of the direct type backlight module will arise.

Generally speaking, in order to solve the problem of uneven brightness and darkness of the picture of the direct-type backlight module, a diverging lens can be arranged above the LED, so that the thickness of the direct-type backlight module can be reduced and the picture can be more uniform. However, the overall thickness of such a direct type backlight module is still much different from that of an edge type backlight module. Therefore, how to further realize the lightness and thinness of the direct type backlight module has become one of the development priorities of relevant manufacturers.

SUMMARY OF THE INVENTION

The invention provides a thin backlight module with good light mixing effect.

The present invention provides a display device with good backlight uniformity and cost advantages.

Other objects and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

To achieve one or part or all of the above objectives or other objectives, an embodiment of the present invention provides a backlight module. The backlight module includes a backplane, a light-emitting element, a first reflection mechanism and a second reflection mechanism. The backplate has a reflective bottom surface. The light-emitting element is arranged on the backplane, and the light-emitting element is used for providing the first light beam and the second light beam. The first reflection mechanism and the second reflection mechanism are respectively arranged on the reflection bottom surface and located on opposite sides of the light-emitting element. A light outlet is arranged between the first reflection mechanism and the second reflection mechanism, and the first light beam from the light-emitting element directly passes through the light outlet. Each of the first reflection mechanism and the second reflection mechanism has a first reflection surface facing the reflection bottom surface. The first reflection surface, the reflection bottom surface and the light outlet of the first reflection mechanism are arranged on the transmission path of the second light beam from the light emitting element.

To achieve one or part or all of the above objectives or other objectives, an embodiment of the present invention provides a display device. The display device includes a backlight module and a display module. The backlight module includes a backplane, a light-emitting element, a first reflection mechanism and a second reflection mechanism. The backplate has a reflective bottom surface. The light-emitting element is arranged on the backplane, and the light-emitting element is used for providing the first light beam and the second light beam. The first reflection mechanism and the second reflection mechanism are respectively arranged on the reflection bottom surface and located on opposite sides of the light-emitting element. A light outlet is arranged between the first reflection mechanism and the second reflection mechanism, and the first light beam from the light-emitting element directly passes through the light outlet. Each of the first reflection mechanism and the second reflection mechanism has a first reflection surface facing the reflection bottom surface. The first reflection surface, the reflection bottom surface and the light outlet of the first reflection mechanism are arranged on the transmission path of the second light beam from the light emitting element. The display module is configured on the backlight module.

Based on the above, in the backlight module of an embodiment of the present invention, the two reflective mechanisms located on opposite sides of the light-emitting element and the light-emitting element are juxtaposed on the reflective bottom surface of the backplane, and pass through the first reflective surface and the back surface of one of the reflective mechanisms The reflective bottom surface of the board reflects part of the light beam from the light-emitting element and transmits it to the light outlet between the two reflecting mechanisms. Since the travel route of the light source is increased, it helps to improve the light mixing effect of the backlight module and the overall light output uniformity, so it can effectively Reduce the thickness of the backlight module to achieve thinning. On the other hand, because the display device of an embodiment of the present invention adopts the backlight module of the above-mentioned embodiment, it can still have a good light mixing effect without using a diffuser plate, so it can further achieve the effect of lightening and thinning, and can reduce the overall production cost.

In order to make the above-mentioned features and advantages of the present invention more obvious and easy to understand, the following embodiments are given and described in detail with the accompanying drawings as follows.

Description of drawings

FIG. 1 is a schematic top view of a display device according to a first embodiment of the present invention.

2 and 3 are schematic cross-sectional views of the display device of FIG. 1 in different directions, respectively.

4 is a schematic cross-sectional view of a display device according to a second embodiment of the present invention.

5 is a schematic cross-sectional view of a display device according to a third embodiment of the present invention.

6 is a schematic cross-sectional view of a display device according to a fourth embodiment of the present invention.

Detailed ways

The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or rear, etc., are only referring to the directions of the drawings. Accordingly, the directional terms used are illustrative and not limiting of the present invention.

FIG. 1 is a schematic top view of a display device according to a first embodiment of the present invention. 2 and 3 are schematic cross-sectional views of the display device of FIG. 1 in different directions, respectively. 2 and 3 correspond to the section line A-A' and the section line B-B' of FIG. 1, respectively. It should be noted that, for the sake of clarity, the illustration of the optical film 150 in FIG. 2 is omitted in FIG. 1 . Please refer to FIG. 1 and FIG. 2 , the display device 10 includes a backlight module 100 and a display module 200 , wherein the display module 200 is disposed on the backlight module 100 . For example, after the light beam from the backlight module 100 passes through the display module 200, an image light beam can be formed and transmitted to the human eye to generate a display image. In this embodiment, the display module 200 is, for example, a liquid crystal display panel, but the present invention is not limited thereto. In other embodiments, the display module 200 may also be an electrophoretic display panel, or other non-self-luminous display panels.

In this embodiment, the backlight module 100 is, for example, a direct backlit module, and includes a backplane 101 and a plurality of light-emitting elements 110 , wherein the light-emitting elements 110 are disposed on the backplane 101 and are used to provide light beams. For example, the backplane 101 can be a printed circuit board, and the light emitting elements 110 can be bonded on the backplane 101 and controlled by a driving circuit disposed on the backplane 101 . However, the present invention is not limited thereto, and according to other embodiments, an additional circuit board may also be provided between the light-emitting element 110 and the backplane 101 , wherein the light-emitting element 110 is bonded to the circuit board, and the circuit board is configured to drive the light-emitting element 110 . In this embodiment, the light-emitting element 110 may be a light-emitting diode (LED) die, but the invention is not limited thereto. In another embodiment, the light-emitting element 110 may also be a cold cathode lamp ( cold cathode fluorescent lamp, CCFL).

Further, the backlight module 100 further includes a plurality of reflection mechanisms 120 disposed on the backplane 101 . As shown in FIG. 1 , the reflection mechanisms 120 may be arranged on the back plate 101 along the direction D1 and extend in the direction D2. A light outlet 130 and at least one light emitting element 110 are disposed between any two adjacent reflecting mechanisms 120 , wherein the light outlet 130 can also extend in the direction D2 and is configured to allow the light beam from the light emitting element 110 to pass through. On the other hand, as shown in FIG. 2 , the back plate 101 has a reflective bottom surface 101s on the side facing the light outlet 130 , and the reflection mechanism 120 has a first reflective surface 120 a facing the reflective bottom surface 101 s and the light-emitting element 110 , wherein the back plate 101 The reflective bottom surface 101s of the reflective mechanism 120 and the first reflective surface 120a of the reflective mechanism 120 are disposed on the transmission path of part of the light beam from the light-emitting element 110 . It should be noted that, in this embodiment, the number of the reflection mechanisms 120 is exemplified by taking two (for example, the first reflection mechanism 121 and the second reflection mechanism 122 ) as an example, which does not mean that the present invention is disclosed with the accompanying drawings. Content is limited.

In this embodiment, the reflection mechanism 120 may be disposed on the reflection bottom surface 101s of the backplane 101, but the present invention is not limited thereto. According to other embodiments, the reflective bottom surface 101s may only occupy a partial area of the side surface of the backplane 101 facing the light outlet 130, and the reflective mechanism 120 may also be disposed on the surface of the backplane 101 other than the reflective bottom surface 101s. It is particularly noted that, no matter whether the reflection mechanism 120 is disposed on the reflection bottom surface 101s or not, as long as the reflection mechanism 120 and the light-emitting element 110 are arranged side by side on the side surface of the back plate 101 facing the light outlet 130, that is, the reflection mechanism 120 and the light-emitting element 110 can be arranged side by side. The light-emitting elements 110 are all located on the same installation surface. In this embodiment, the material of the reflection mechanism 120 may include polycarbonate (PC).

On the other hand, the reflection mechanism 120 may overlap the corresponding light-emitting element 110 in the normal direction of the backplane 101 . More specifically, the first reflection surface 120 a of the reflection mechanism 120 can overlap the light-emitting element 110 in the normal direction of the backplane 101 , and the light-emitting element 110 is located between the first reflection surface 120 a and the backplane 101 . However, the present invention is not limited to this. In other embodiments, the reflection mechanism 120 may not overlap the light-emitting element 110 in the normal direction of the backplane 101 , as long as part of the light beam emitted by the light-emitting element 110 can be directly transmitted to the reflection mechanism 120 The first reflective surface 120a is sufficient. It should be noted that, the direct transmission here means that part of the light beam emitted by the light-emitting element 110 can be transmitted to the first reflection surface 120a without the action of other optical elements.

As shown in FIG. 2 , the first reflection surface 120a may be a smooth curved surface, and the first reflection surface 120a may be a part of a side surface of the reflection mechanism 120 facing the corresponding light emitting element 110 , but the invention is not limited thereto. In some embodiments, the first reflective surface 120a may also be a (bent) curved surface formed by multiple reflective surfaces. In other embodiments, the first reflection surface 120a may also extend from the bottom of the reflection mechanism 120 to the top of the reflection mechanism 120 . That is, one side surface of the reflection mechanism 120 facing the corresponding light-emitting element 110 may all be the first reflection surface 120a.

For example, the light-emitting element 110 located between any two adjacent reflection mechanisms 120 (eg, the first reflection mechanism 121 and the second reflection mechanism 122 ) is used to provide at least the first light beam B1 , the second light beam B2 and the third light beam B3. For convenience of description, in this embodiment, the first reflection mechanism 121 is the reflection mechanism corresponding to the light-emitting element 110 , and the second reflection mechanism 122 is the adjacent reflection mechanism. As shown in FIG. 2 , the first light beam B1 from the light emitting element 110 directly passes through the light outlet 130 and enters the display module 200 . It should be noted that the “directly passing through” here means that there is no optical element in any form on the transmission path of the first light beam B1, that is, the first light beam B1 can be directly transmitted to the Light outlet 130 . On the other hand, the transmission path of the second light beam B2 from the light emitting element 110 is provided with the first reflection surface 120 a of the first reflection mechanism 121 , the reflection bottom surface 101 s of the back plate 101 and the light outlet 130 . Specifically, the second light beam B2 emitted by the light emitting element 110 is transmitted to the light outlet 130 after being reflected by the first reflecting surface 120 a of the first reflecting mechanism 121 and the reflecting bottom surface 101 s of the back plate 101 in sequence. That is, the transmission path of the second light beam B2 is longer than that of the first light beam B1. Accordingly, the distribution range of the light beam emitted by the light emitting element 110 in the light outlet 130 can be increased, which helps to improve the light mixing effect of the backlight module 100 .

Further, the reflection mechanism 120 may further have a second reflection surface 120b on a side opposite to the first reflection surface 120a. As shown in FIG. 2 , the first reflection surface 120 a of the first reflection mechanism 121 may face the second reflection surface 120 b of the second reflection mechanism 122 , and the first reflection surface 120 a of the third light beam B3 from the light-emitting element 110 may be provided on the transmission path. The first reflection surface 120 a of the reflection mechanism 121 , the second reflection surface 120 b of the second reflection mechanism 122 and the light outlet 130 . Specifically, the third light beam B3 from the light emitting element 110 is transmitted to the light outlet 130 after being reflected by the first reflecting surface 120 a of the first reflecting mechanism 121 and the second reflecting surface 120 b of the second reflecting mechanism 122 in sequence. In other words, the transmission path of the third light beam B3 is longer than that of the second light beam B2.

However, the present invention is not limited thereto. In some embodiments, a part of the light beam from the light emitting element 110 passes through the first reflection surface 120a of the first reflection mechanism 121, the reflection bottom surface 101s of the back plate 101, and the second reflection mechanism 122 in sequence. The second reflection surface 120b is reflected and transmitted to the light outlet 130 . In other words, the transmission path of this part of the light beam is longer than the transmission path of the third light beam B3. It can be seen from this that, by arranging the first reflecting surface 120a and the second reflecting surface 120b on the opposite sides of the light outlet 130, the transmission path length of the light beam between the light emitting element 110 and the light outlet 130 can be increased, so as to improve the light beam in the light output The uniformity of the diffusion of the opening 130 can further enable the light beams emitted by the light emitting element 110 to achieve the effect of uniform light mixing. Therefore, the configuration quantity (or distribution density) of the light-emitting elements 110 can be reduced, which is helpful to reduce the production cost and achieve the effect of energy saving. From another point of view, the overall thickness of the backlight module 100 can also be further reduced to achieve a slimming effect.

In this embodiment, the second reflection surface 120b of the reflection mechanism 120 may be a plane, and the second reflection surface 120b may face the light outlet 130 and the first reflection surface 120a of the other reflection mechanism 120 at the same time. For example, the second reflection surface 120b may extend from the bottom of the reflection mechanism 120 to the top of the reflection mechanism 120, and there may be an acute angle between the second reflection surface 120b and the reflection bottom surface 101s of the backplane 101, but the invention is not limited to this. In some embodiments, the second reflection surface 120b may also be a part of a side surface of one reflection mechanism 120 facing the first reflection surface 120a of another reflection mechanism 120 .

Further, the backlight module 100 may optionally include an optical film 150 , and the optical film 150 is located between the display module 200 and the reflection mechanism 120 . In this embodiment, the reflection mechanism 120 may further have a receiving portion 125 on the side away from the back plate 101 (or the top of the reflection mechanism 120 ), and the receiving portion 125 of the reflection mechanism 120 is used for receiving the optical film 150 . For example, the receiving portion 125 may further have a receiving surface 120s, and the optical film 150 is disposed on the receiving surface 120s, but the invention is not limited thereto. Accordingly, the arrangement flatness of the optical film 150 in the backlight module 100 can be improved. In this embodiment, the optical film 150 includes, for example, a prism sheet, a diffuser plate or other different forms of optical brightness enhancement film (BEF). It is worth mentioning that, in some embodiments, because the backlight module 100 is provided with the above-mentioned reflection mechanism 120, even if there is no diffuser plate configuration, it can still have a good light mixing effect. In other words, the backlight module 100 provided with the reflection mechanism 120 does not need to be equipped with an additional diffuser plate, which helps to reduce the overall weight, thickness and production cost.

Referring to FIG. 1 , in this embodiment, the reflection mechanism 120 may optionally have a plurality of holes 120h, and the area occupied by the holes 120h does not overlap the light-emitting element 110 in the normal direction of the backplane 101 . That is, the vertical projection of the hole 120 h on the back plate 101 is located outside the vertical projection of the light emitting element 110 on the back plate 101 . Specifically, the reflection mechanism 120 may extend in the direction D2 and overlap the plurality of light-emitting elements 110 , and the plurality of perforations 120h and the plurality of light-emitting elements 110 may be alternately arranged in the direction D2 . It should be noted that the plurality of perforated holes 120h in this embodiment are exemplarily described by taking the same aperture as an example, which does not mean that the present invention is limited by the contents disclosed in the drawings. In other embodiments, the plurality of perforated holes 120h The distribution density can be adjusted according to the light output intensity of the light emitting element 110 adjacent to the hole 120h, or the aperture of the hole 120h can be adjusted according to the light output intensity of the light emitting element 110 adjacent to the hole 120h; That is to say, the plurality of holes 120h of the reflection mechanism 120 may have different distribution densities or different apertures respectively, so as to improve the uniformity of light output of the backlight module 100 . On the other hand, referring to FIG. 2 and FIG. 3 , the holes 120h can be disposed on the receiving portion 125 of the reflecting mechanism 120 and penetrate through the first reflecting surface 120a and the receiving surface 120s of the receiving portion 125 , that is, the holes 120h can be formed by The side of the reflection mechanism 120 where the light-emitting element 110 is provided extends to the side where the optical film 150 is provided.

For example, as shown in FIG. 3 , the light-emitting element 110 can further provide a fourth light beam B4 and a fifth light beam B5 . The fourth light beam B4 can be directly transmitted to an adjacent hole 120h, and the fourth light beam B4 is transmitted from the reflection mechanism 120 to the side of the first reflection surface 120a through multiple (diffuse) reflections on the inner surface of the hole 120h. It is transmitted to the side of the reflection mechanism 120 where the receiving surface 120s is provided. On the other hand, the fifth light beam B5 is sequentially reflected by the first reflective surface 120a and the reflective bottom surface 101s and then transmitted to another hole 120h that is close to the light-emitting element 110 times, and then passes through the inner surface of the hole 120h for many times. The (diffuse) reflection transmits the fifth light beam B5 from the side of the reflection mechanism 120 where the first reflection surface 120a is provided to the side of the reflection mechanism 120 where the receiving surface 120s is provided. That is to say, through the arrangement of the plurality of holes 120h, part of the light beam from the light-emitting element 110 can be incident on the optical film 150 through the receiving surface 120s between the two adjacent light-emitting regions 130, which is helpful to further improve the backlight. The light mixing effect of the module 100 .

Hereinafter, other embodiments will be listed to describe the present disclosure in detail, wherein the same components will be marked with the same symbols, and the description of the same technical content will be omitted.

4 is a schematic cross-sectional view of a display device according to a second embodiment of the present invention. Referring to FIG. 4 , the main difference between the display device 11 of this embodiment and the display device 10 of FIG. 2 is that the configuration of the reflection mechanism is different. In this embodiment, the receiving portion of the reflection mechanism 120A may not have a receiving surface, and a larger light outlet 130 is provided between two adjacent reflection mechanisms 120A (eg, the first reflection mechanism 121A and the second reflection mechanism 122A); More specifically, the area occupied by the light outlet 130 (or the second reflecting surface 120 b ) may overlap the light emitting element 110 in the normal direction of the backplane 101 . For example, after the sixth light beam B6 from the light-emitting element 110 is reflected by the first reflecting surface 120a of the first reflecting mechanism 121A, it is transmitted to the second reflecting surface 120b of the second reflecting mechanism 122A to overlap with the corresponding light-emitting element The portion (in the direction of the normal line of the back plate 101 ) is then transmitted to the light outlet 130 after being reflected by this portion of the second reflective surface 120b. In other words, by minimizing the distance between any two adjacent light exit ports 130 , the light mixing effect of the backlight module 100A can be further improved. It is particularly mentioned that in this embodiment, as shown in FIG. 4 , the reflection mechanism 120A is not provided with the plurality of holes 120h as shown in FIG. 1 for exemplary illustration, which does not mean that the present invention is based on the accompanying drawings. The disclosure is limited, and in other embodiments, the reflection mechanism 120A may selectively have a plurality of perforated holes 120h, so as to improve the uniformity of light output of the backlight module 100A.

5 is a schematic cross-sectional view of a display device according to a third embodiment of the present invention. Referring to FIG. 5 , the main difference between the display device 12 of this embodiment and the display device 11 of the previous embodiment is that the configuration of the reflection mechanism is different. In this embodiment, the second reflection surface 120b of the reflection mechanism 120B can be a curved surface, and the design margin of the backlight module 100B can be increased through the corresponding relationship with the first reflection surface 120a which is also a curved surface.

6 is a schematic cross-sectional view of a display device according to a fourth embodiment of the present invention. Referring to FIG. 6 , the difference between the display device 13 of this embodiment and the display device 12 of FIG. 5 is that the configuration of the second reflection surface 120 b of the reflection mechanism is different. In this embodiment, the backlight module 100C may optionally further include a plurality of optical microstructures 128 disposed on the second reflective surface 120b, and the optical microstructures 128 are, for example, point-like microstructures. More specifically, the plurality of optical microstructures 128 may be a plurality of bumps respectively protruding from the second reflection surface 120b of the reflection mechanism 120C, but the present invention is not limited thereto. In other embodiments, the plurality of optical microstructures 128 may also be a plurality of concave points respectively recessed from the second reflection surface 120b of the reflection mechanism.

In particular, by arranging optical microstructures 128 (eg, bumps) on the second reflective surface 120b of the reflective mechanism 120C (eg, the second reflective mechanism 122C), the first reflective surface from the first reflective mechanism 121C can be increased. The light mixing efficiency of the light beam (eg, the third light beam B3 ) of the 120a is improved, thereby improving the light mixing effect of the backlight module 100C. It should be noted that, in the present embodiment, the plurality of bumps (ie, the optical microstructures 128 ) are exemplarily described with substantially the same particle size, which does not mean that the present invention is limited to the contents disclosed in the accompanying drawings. In other embodiments, the plurality of bumps may also have different particle sizes according to different requirements of reflection efficiency.

To sum up, in the backlight module of an embodiment of the present invention, the two reflecting mechanisms located on opposite sides of the light-emitting element and the light-emitting element are juxtaposed on the reflective bottom surface of the backplane, and pass through the first reflecting surface of one of the reflecting mechanisms The reflective bottom surface of the backplane reflects and transmits part of the light beam from the light-emitting element to the light outlet between the two reflection mechanisms. Since the travel route of the light source is increased, it helps to improve the light mixing effect of the backlight module and the overall light output uniformity. On the other hand, because the display device of an embodiment of the present invention adopts the backlight module of the above-mentioned embodiment, it can still have a good light mixing effect without using a diffuser plate, so it can further achieve the effect of lightening and thinning, and can reduce the overall production cost.

Although the present invention has been disclosed above with examples, it is not intended to limit the present invention. Any person of ordinary skill in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be defined by the appended claims.

Description of reference numbers:

10, 11, 12, 13: Display device

100, 100A～100C: Backlight module

101: Backplane

101s: Reflective bottom surface

110: Light-emitting element

120, 120A～120C: Reflection mechanism

121, 121A, 121C: the first reflection mechanism

122, 122A, 122C: Second reflection mechanism

120a: first reflecting surface

120b: second reflecting surface

120h: broken hole

120s: receiving surface

125: Undertaking Department

128: Optical Microstructures

130: light outlet

150: Optical film

200: Display module

B1 to B6: First beam to sixth beam

D1, D2: direction

A-A', B-B': Section lines.

Claims (12)

1. A backlight module, characterized in that the backlight module comprises a backplane, a light-emitting element, and a first reflection mechanism and a second reflection mechanism, wherein: the backplane has a reflective bottom surface; The light-emitting element is disposed on the backplane, and the light-emitting element is used to provide a first light beam and a second light beam; and The first reflection mechanism and the second reflection mechanism are respectively disposed on the reflection bottom surface and on opposite sides of the light-emitting element, a light outlet is provided between the first reflection mechanism and the second reflection mechanism, and The first light beam from the light-emitting element directly passes through the light outlet, The first reflection mechanism and the second reflection mechanism each have a first reflection surface facing the reflection bottom surface, and the first reflection surface, the reflection bottom surface and the light output of the first reflection mechanism A port is provided on the transmission path of the second light beam from the light emitting element. 2 . The backlight module according to claim 1 , wherein the first reflective surface is a curved surface or a curved surface composed of a plurality of reflective surfaces. 3 . 3 . The backlight module according to claim 1 , wherein, in the normal direction of the back plate, the first reflection mechanism overlaps the light-emitting element. 4 . 4 . The backlight module of claim 3 , wherein the first reflection surface of the first reflection mechanism overlaps the light-emitting element. 5 . 5 . The backlight module of claim 1 , wherein each of the first reflection mechanism and the second reflection mechanism further has a second reflection surface, and the first reflection of the first reflection mechanism facing the second reflection surface of the second reflection mechanism. 6 . The backlight module according to claim 5 , wherein the light-emitting element is further configured to provide a third light beam, and the first reflection surface of the first reflection mechanism and the second reflection mechanism of the second reflection mechanism The second reflection surface and the light outlet are arranged on the transmission path of the third light beam from the light emitting element. 7 . The backlight module of claim 5 , wherein the second reflecting surface is a curved surface. 8 . 8. The backlight module of claim 5, further comprising a plurality of optical microstructures disposed on the second reflection surface. 9 . The backlight module of claim 8 , wherein the plurality of optical microstructures is a plurality of point-shaped microstructures. 10 . 10 . The backlight module according to claim 1 , further comprising an optical film, wherein each of the first reflection mechanism and the second reflection mechanism further has a receiving portion, and the receiving portion is disposed on the receiving portion. 11 . The top ends of the first reflection mechanism and the second reflection mechanism are used for receiving the optical film. 11 . The backlight module according to claim 4 , wherein the first reflection mechanism and the second reflection mechanism each further have a plurality of perforated holes, and the plurality of perforated holes penetrate through the first reflection surface. 12 . , and the area occupied by the plurality of holes does not overlap with the light-emitting element. 12. A display device, characterized in that the display device comprises a backlight module and a display module, wherein: The backlight module includes a backplane, a light-emitting element, and a first reflection mechanism and a second reflection mechanism, wherein: the backplane has a reflective bottom surface; The light-emitting element is disposed on the backplane, and the light-emitting element is used to provide a first light beam and a second light beam; and The first reflection mechanism and the second reflection mechanism are respectively disposed on the reflection bottom surface and on opposite sides of the light-emitting element, a light outlet is provided between the first reflection mechanism and the second reflection mechanism, and The first light beam from the light-emitting element directly passes through the light outlet, The first reflection mechanism and the second reflection mechanism each have a first reflection surface facing the reflection bottom surface, and the first reflection surface, the reflection bottom surface and the light output of the first reflection mechanism a port disposed on the transmission path of the second light beam from the light emitting element; and The display module is configured on the backlight module.

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