CN214041944U

CN214041944U - Backlight module and display

Info

Publication number: CN214041944U
Application number: CN202120252963.6U
Authority: CN
Inventors: 李有钦; 李易勋; 温台光
Original assignee: Coretronic Corp
Current assignee: Coretronic Corp
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-08-24
Anticipated expiration: 2031-01-29

Abstract

A backlight module comprises a back plate, a light guide plate, a reflecting plate and at least one wavy flexible structure. The back plate comprises a main plate part and a plurality of side plate parts connected to the main plate part. The light guide plate is arranged on the back plate. The light guide plate is provided with a bottom surface and a plurality of side surfaces connected with the bottom surface. The bottom surface of the light guide plate faces the main plate portion, and the side surfaces of the light guide plate face the side plate portions, respectively. The reflecting plate is at least arranged between the bottom surface of the light guide plate and the main board part of the back plate. At least one wave-shaped flexible structure is arranged between at least one of the side surfaces of the light guide plate and at least one of the corresponding side plate parts. When the light guide plate expands or contracts, the at least one wavy flexible structure is correspondingly deformed to continuously abut against at least one side surface of the light guide plate. In addition, a display comprising the backlight module is also provided. The utility model discloses a backlight module has good reliability.

Description

Backlight module and display

Technical Field

The present invention relates to a backlight module and an optical device, and more particularly, to a backlight module and a display having good reliability.

Background

In order to adapt to the size change caused by thermal expansion and contraction of the light guide plate in the backlight module, an elastic member such as foam, silica gel or rubber is usually inserted into the gap between the light guide plate and the back plate to prevent the light guide plate from colliding with the back plate to damage or generate abnormal noise during vibration.

However, in the current backlight module, the following disadvantages exist in the foam, the silica gel or the rubber for fixing the light guide plate: (1) in terms of thickness, shape and elasticity, the foam cannot be widely applied to backlight modules of different sizes because of the standard thickness and shape and the small elasticity, and the silica gel or the rubber can be customized into different structures and has large elasticity, but the customization cost is high. (2) In terms of material characteristics, foam cotton is a foaming material and has the risk of friction chip falling, the friction chip falling can influence the light emitting quality of the backlight module, silica gel or rubber has the phenomenon of oil outlet at high temperature, and the oil outlet can damage internal parts of the backlight module and shorten the service life of the backlight module.

The background section is only provided to aid in understanding the present invention, and therefore the disclosure in the background section may include some known techniques which do not constitute a part of the knowledge of those skilled in the art. The disclosure in the "background" section does not represent that content or the problems which may be solved by one or more embodiments of the present invention are known or appreciated by those skilled in the art prior to the filing of the present application.

SUMMERY OF THE UTILITY MODEL

The utility model provides a backlight module has good reliability.

The utility model provides a display, which is provided with the backlight module.

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

In order to achieve one or a part of or all of the above or other objects, an embodiment of the present invention provides a backlight module. The backlight module comprises a back plate, a light guide plate, a reflecting plate and at least one wavy flexible structure. The back plate comprises a main plate part and a plurality of side plate parts connected to the main plate part. The light guide plate is arranged on the back plate and is provided with a bottom surface and a plurality of side surfaces connected with the bottom surface. The bottom surface of the light guide plate faces the main plate portion, and the side surfaces face the side plate portions, respectively. The reflecting plate is at least arranged between the bottom surface of the light guide plate and the main board part of the back plate. At least one wave-shaped flexible structure is arranged between at least one of the side surfaces of the light guide plate and at least one of the corresponding side plate parts. When the light guide plate expands or contracts, the at least one wavy flexible structure is correspondingly deformed to continuously abut against at least one side surface of the light guide plate.

To achieve one or a part of or all of the above or other objects, an embodiment of the present invention provides a display. The display comprises a backlight module and a display panel. The backlight module comprises a back plate, a light guide plate, a reflecting plate and at least one wavy flexible structure. The back plate comprises a main plate part and a plurality of side plate parts connected to the main plate part. The light guide plate is arranged on the back plate. The light guide plate is provided with a light-emitting surface, a bottom surface opposite to the light-emitting surface and a plurality of side surfaces connected with the light-emitting surface and the bottom surface. The bottom surface of the light guide plate faces the main plate portion, and the side surfaces face the side plate portions, respectively. The reflecting plate is at least arranged between the bottom surface of the light guide plate and the main board part of the back plate. At least one wave-shaped flexible structure is arranged between at least one of the side surfaces of the light guide plate and at least one of the corresponding side plate parts. The light guide plate is located between the display panel and the reflection plate, and when the light guide plate expands or contracts, the at least one wavy flexible structure is correspondingly deformed to continuously abut against at least one side face of the light guide plate.

In view of the above, in the design of the backlight module of the present invention, the wavy flexible structure is disposed between the side surface of the light guide plate and the corresponding side plate portion. When the light guide plate expands or contracts, the wavy flexible structure is correspondingly deformed and continuously props against the side face of the light guide plate. Therefore, the utility model discloses a compressible deformation that backlight unit permeable wavy flexible structure had and the ability of recoverable, even if under the condition of expend with heat and contract with cold, the light guide plate also still is well fixed. Therefore, the backlight module of the present invention has good optical quality and can prevent abnormal noise caused by vibration.

In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic side view of a display according to an embodiment of the present invention.

FIG. 2 is a schematic top view of a backlight module of the display of FIG. 1.

Fig. 3 is a schematic perspective view of a backlight module of the display of fig. 1.

Fig. 4 is a schematic perspective view of the reflection plate and the wave-shaped flexible structure of the backlight module of fig. 3.

Fig. 5 is a side partial sectional view of the backlight module of fig. 3 along a section line a-a.

Fig. 6A is a side partial sectional view of the backlight module of fig. 5 when the light guide plate is expanded.

Fig. 6B is a side partial sectional view of the backlight module of fig. 5 when the light guide plate is contracted.

Fig. 7 is a schematic perspective view of a backlight module according to another embodiment of the present invention.

Fig. 8 is a perspective view of the reflection plate and the wave-shaped flexible structure of the backlight module of fig. 7.

Fig. 9A is a side partial sectional view of the backlight module of fig. 7 along a section line a-a.

FIG. 9B is a side partial cross-sectional view of the backlight module of FIG. 7 taken along section line B-B.

Fig. 10 is a schematic perspective view of a backlight module according to another embodiment of the present invention.

Fig. 11 is a perspective view of the reflection plate and the wave-shaped flexible structure of the backlight module of fig. 10.

Fig. 12A is a side partial sectional view of the backlight module of fig. 10 along a section line a-a.

FIG. 12B is a side partial cross-sectional view of the backlight module of FIG. 10 taken along section line B-B.

Fig. 13 is a schematic top view of a backlight module according to another embodiment of the present invention.

Fig. 14 is a schematic top view of a backlight module according to another embodiment of the present invention.

Fig. 15 is a schematic top view of a backlight module according to another embodiment of the present invention.

Detailed Description

The foregoing and other features, aspects and utilities of the present invention will be apparent from the following more particular description of a preferred embodiment of the invention as illustrated in the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

Fig. 1 is a schematic side view of a display according to an embodiment of the present invention. Referring to fig. 1, a display 10 of the present embodiment includes a backlight module 100 and a display panel 200. The display panel 200 is disposed on the backlight module 100. Here, the display panel 200 is, for example, a liquid crystal display panel, but is not limited thereto.

FIG. 2 is a schematic top view of a backlight module of the display of FIG. 1. Fig. 3 is a schematic perspective view of a backlight module of the display of fig. 1. Referring to fig. 1 to 3, the backlight module 100 of the present embodiment includes a back plate 110, a light guide plate 120, a reflective plate 130, and a wave-shaped flexible structure 140.

As shown in fig. 1, in the present embodiment, the back plate 110 includes a main plate portion 111 and a plurality of side plate portions 112 connected to the main plate portion 111. The light guide plate 120 is disposed on the back plate 110 and between the display panel 200 and the reflective plate 130. The light guide plate 120 has a light emitting surface 123, a bottom surface 121 opposite to the light emitting surface 123, and a plurality of side surfaces 122 connected to the light emitting surface 123 and the bottom surface 121.

In detail, as shown in fig. 1 and fig. 2, in the present embodiment, the bottom surface 121 of the light guide plate 120 faces the main plate portion 111 of the back plate 110, and the plurality of side surfaces 122 of the light guide plate 120 face the plurality of side plate portions 112 of the back plate 110, respectively. The reflective plate 130 is disposed between the bottom surface 121 of the light guide plate 120 and the main plate 111 of the back plate 110. The backlight module 100 includes two wavy flexible structures 140 disposed between two side surfaces 122 (the right side and the lower side in fig. 2) of the light guide plate 120 and the corresponding side plate portions 112 of the back plate 110, for example. The backlight module 100 further includes a light source 180, and the light source 180 faces one of the side surfaces 122 (left side of fig. 1, upper side of fig. 2) of the light guide plate 120. In addition, the backlight module 100 may further include an optical film set 150 (shown in fig. 1) to adjust the light emitting effect of the backlight module 100, wherein the optical film set 150 is located between the display panel 200 and the light guide plate 120. It should be noted that the optical film set 150 is omitted from the backlight module 100 of fig. 2 to clearly show the light guide plate 120.

Further, as shown in fig. 1 and fig. 2, in the present embodiment, the plurality of side plate portions 112 of the back plate 110 include a first side plate portion 1121, a second side plate portion 1122, a third side plate portion 1123, and a fourth side plate portion 1124. The first side plate portion 1121 is provided to face the second side plate portion 1122, and the third side plate portion 1123 and the fourth side plate portion 1124 are provided to face each other. The first side plate portion 1121 and the second side plate portion 1122 are located between the third side plate portion 1123 and the fourth side plate portion 1124.

As shown in fig. 2, in the present embodiment, the plurality of sides 122 of the light guide plate 120 includes a first side 1221, a second side 1222, a third side 1223, and a fourth side 1224. The first side surface 1221, the second side surface 1222, the third side surface 1223, and the fourth side surface 1224 of the light guide plate 120 face the first side plate portion 1121, the second side plate portion 1122, the third side plate portion 1123, and the fourth side plate portion 1124 of the back plate 110, respectively.

In the present embodiment, one of the corrugated flexible structures 140 is disposed between the second side 1222 of the light guide plate 120 and the corresponding second side 1122 of the back plate 110. The other wave-shaped flexible structure 140 is disposed between the third side plate 1123 of the light guide plate 120 and the corresponding third side 1223 of the back plate 110. The light source 180 is close to the first side plate portion 1121 of the back plate 110 and faces the first side surface 1221 of the light guide plate 120.

Fig. 4 is a schematic perspective view of the reflection plate and the wave-shaped flexible structure of the backlight module of fig. 3. Fig. 5 is a side partial sectional view of the backlight module of fig. 3 along a section line a-a. Referring to fig. 5, in the present embodiment, the optical film set 150 includes, for example, an optical film 151, an optical film 152 and an optical film 153 stacked one on another. The optical film set 150 is disposed on the light guide plate 120. The

optical films

151, 152, 153 may include, for example, a diffusion sheet, an optical brightness enhancement film, a wavelength conversion film, a prism sheet, or a composite prism sheet. It should be noted that the present invention is not limited to the type, number and configuration of the optical films in the optical film group 150, and those skilled in the art can adjust the type, number and configuration of the optical films in the optical film group 150 according to the required optical effect.

Referring to fig. 4 and fig. 5, the two wavy flexible structures 140 of the backlight module 100 of the present embodiment are formed by bending at least a portion of the reflection plate 130 at a position beyond the bottom surface 121 of the light guide plate 120, for example.

In detail, as shown in fig. 4, in the present embodiment, the two wave-shaped flexible structures 140 respectively have a plurality of parallel folding lines. The length L1 of one of the wave-shaped flexible structures 140 in the extending direction of the folding lines is the same as the length L2 of the reflective plate 130 in the extending direction of the folding lines. The length L3 of the other wave-shaped flexible structure 140 in the extending direction of the folding lines is the same as the length L4 of the reflective plate 130 in the extending direction of the folding lines.

Referring to fig. 2 and fig. 5, the backlight module 100 of the present embodiment further includes at least one first adhesive layer 160, such as two first adhesive layers 160. Each first adhesive layer 160 is disposed between the wave-shaped flexible structure 140 and the corresponding side plate portion 112 of the back plate 110, so as to fix the wave-shaped flexible structure 140 to the side plate portion 112 of the back plate 110. The first adhesive layer 160 is, for example, a double-sided adhesive tape, but the present invention is not limited thereto.

Therefore, as shown in fig. 2, in the present embodiment, the first side surface 1221 and the fourth side surface 1224 of the light guide plate 120 are respectively close to the first side plate portion 1121 and the fourth side plate portion 1124 of the back plate 110. Meanwhile, the two wavy flexible structures 140 respectively abut against the second side 1222 and the third side 1223 of the light guide plate 120, so that the plurality of sides 122 of the light guide plate 120 can be well fixed in the backlight module 100.

It should be noted that, in the embodiment, compared to the conventional foam, silica gel or rubber for fixing the light guide plate, the number of folds of the wavy flexible structure formed by bending the reflective plate can be adjusted as required to provide different sizes and elastic forces, and the backlight module can be generally used for backlight modules with different frame widths. Moreover, since the wave-shaped flexible structure is formed by bending the reflective plate, it is not necessary to fix the light guide plate through an additional elastic fixing member, such as foam, silica gel or rubber. Therefore, the backlight module with the wavy flexible structure can not only reduce the production cost, but also avoid the problem that the fixing piece pollutes the internal components of the backlight module due to material deterioration and scrap falling caused by high-temperature environment.

Fig. 6A is a side partial sectional view of the backlight module of fig. 5 when the light guide plate is expanded. Fig. 6B is a side partial sectional view of the backlight module of fig. 5 when the light guide plate is contracted. Referring to fig. 2, fig. 5, fig. 6A and fig. 6B, in the present embodiment, the corrugated flexible structure 140 has a special structural design, so that when the light guide plate 120 expands (e.g., expands when heated) or contracts (e.g., contracts when cooled), the light guide plate 120 can still be well fixed. One of the corrugated flexible structures 140 between the second side 1222 of the light guide plate 120 and the second side 1122 of the back plate 110 will be described.

As shown in fig. 5 and fig. 6A, in the present embodiment, when the light guide plate 120 of the backlight module 100 expands due to heat, the second side 1222 of the light guide plate 120 moves toward the second side 1122 of the back plate 110. The corrugated flexible structure 140 is pushed by the light guide plate 120 to be compressed and deformed. At this time, the wave-shaped flexible structure 140, which is compressed and deformed, can still continuously push against the second side 1222 of the light guide plate 120, so as to fix the light guide plate 120 well.

As shown in fig. 6B, in the present embodiment, when the light guide plate 120 of the backlight module 100 contracts when it is cooled, the second side 1222 of the light guide plate 120 moves away from the second side 1122 of the back plate 110. At this time, the wave-shaped flexible structure 140 will still continuously push against the second side 1222 of the light guide plate 120 due to its elastic restoring force, so as to fix the light guide plate 120 well.

Other examples will be listed below for illustration. It should be noted that the following embodiments follow the reference numerals and parts of the contents of the foregoing embodiments, wherein the same reference numerals are used to indicate the same or similar elements, and the description of the same technical contents is omitted. The different features of the embodiments can in principle be applied to other embodiments. For the description of the omitted parts, reference may be made to the foregoing embodiments, and the following embodiments will not be repeated.

Fig. 7 is a schematic perspective view of a backlight module according to another embodiment of the present invention. Fig. 8 is a perspective view of the reflection plate and the wave-shaped flexible structure of the backlight module of fig. 7. Fig. 9A is a side partial sectional view of the backlight module of fig. 7 along a section line a-a. FIG. 9B is a side partial cross-sectional view of the backlight module of FIG. 7 taken along section line B-B. Referring to fig. 7 to 9B, a main difference between the backlight module 100A of the present embodiment and the backlight module 100 of the previous embodiment is that the distribution pattern and the number of the wavy flexible structures 140A of the backlight module 100A are different from the distribution pattern and the number of the wavy flexible structures 140 of the backlight module 100.

As shown in fig. 7 to 9B, in the present embodiment, the three wave-shaped flexible structures 140A are formed by bending a portion of the reflective plate 130 at a position beyond the bottom surface 121 of the light guide plate 120. The cross-section of FIG. 9A shows the portion of the reflective plate 130 bent into the corrugated flexible structure 140A. The cross section of FIG. 9B shows that the reflective plate 130 does not extend beyond the bottom surface 121 of the light guide plate 120, and further, the edge of the reflective plate 130 is substantially flush with the second side 1222 of the light guide plate 120.

In detail, as shown in fig. 8, in the present embodiment, the three wave-shaped flexible structures 140A respectively have a plurality of parallel folding lines, and the three wave-shaped flexible structures 140A have a length L1' in the extending direction of the folding lines. The reflective plate 130 has a length L2 and a length L4 in the extending direction of the folding lines, respectively. The lengths L1' of the wave-shaped flexible structures 140A in the extending direction of the folding lines are all smaller than the lengths L2 and L4 of the reflection plate in the extending direction of the folding lines.

In the present embodiment, two of the three wavy flexible structures 140A are respectively located between the second side 1222 of the light guide plate 120 and the second side plate portion 1122 of the back plate 110, and the other is located between the third side 1223 of the light guide plate 120 and the third side plate portion 1123 of the back plate 110 (refer to fig. 2 for the relative positions of the second side 1222, the third side 1223, the second side plate portion 1122, and the third side plate portion 1123). It should be noted that the present invention is not limited to the number of the wavy flexible structures 140A between one of the side surfaces 122 of the light guide plate 120 and the corresponding one of the side plate portions 112 of the back plate 110.

In this embodiment, in addition to adjusting the number of the corrugated flexible structures 140A, the backlight module 100A may also control the magnitude of the elastic force of the corrugated flexible structures 140A by adjusting the number of the corrugated flexible structures 140A and the length of the corrugated flexible structures in the extending direction. In addition, since the length of the wave-shaped flexible structures 140A in the extending direction of the folding lines is smaller than the length of the reflection plate in the extending direction of the folding lines, the difficulty of punching and forming the reflection plate 130 into a plurality of wave-shaped flexible structures 140A can be reduced.

Fig. 10 is a schematic perspective view of a backlight module according to another embodiment of the present invention. Fig. 11 is a perspective view of the reflection plate and the wave-shaped flexible structure of the backlight module of fig. 10. Fig. 12A is a side partial sectional view of the backlight module of fig. 10 along a section line a-a. FIG. 12B is a side partial cross-sectional view of the backlight module of FIG. 10 taken along section line B-B.

Referring to fig. 10 to 12B, a main difference between the backlight module 100B of the present embodiment and the backlight module 100A of the previous embodiment is that the reflection plate 130 of the backlight module 100B has a portion which can be folded to cover the light guide plate 120 at a position beyond the bottom surface 121 of the light guide plate 120.

As shown in fig. 11 to 12B, in the present embodiment, the reflection plate 130 includes three first portions 1301 and five second portions 1302 at the positions beyond the bottom surface 121 of the light guide plate 120, the three wave-shaped flexible structures 140B are respectively formed by bending the three first portions 1301, and the five second portions 1302 can be folded upwards to respectively cover parts of the second side 1222 and the third side 1223 of the light guide plate 120 (the relative positions of the second side 1222 and the third side 1223 can refer to fig. 2).

In detail, as shown in fig. 10 to 12B, the backlight module 100B of the present embodiment further includes at least one second adhesive layer 170, for example, five second adhesive layers 170. The three second adhesive layers 170 are respectively disposed between the three second portions 1302 and the covered second side 1222 of the light guide plate 120, and the two second adhesive layers 170 are respectively disposed between the two second portions 1302 and the covered third side 1223 of the light guide plate 120 (the relative positions of the second side 1222 and the third side 1223 can refer to fig. 2), so as to fix the reflective plate 130 to the light guide plate 120. In addition, in the embodiment, the second adhesive layer 170 is, for example, a double-sided tape, but the invention is not limited to the material and the type of the second adhesive layer 170.

That is, as shown in fig. 11, in the present embodiment, the reflective plate 130 may form a plurality of second portions 1302 penetrating between the wave-shaped flexible structures 140B outside the first portions 1301 forming the three wave-shaped flexible structures 140B. Therefore, the second portion 1302 of the reflective plate 130 is fixed to the plurality of side surfaces 122 of the light guide plate 120 by the second adhesive layer 170, so that the light guide plate 120 is prevented from moving upward to the oblique edge of the wavy flexible structure 140B due to thermal expansion, and the light guide plate 120 can be well fixed in the backlight module.

Fig. 13 is a schematic top view of a backlight module according to another embodiment of the present invention. Fig. 14 is a schematic top view of a backlight module according to another embodiment of the present invention. Fig. 15 is a schematic top view of a backlight module according to another embodiment of the present invention. It should be noted that the optical film set 150 is omitted from the

backlight modules

100C, 100D and 100E in fig. 13, 14 and 15 to clearly show the light guide plate 120.

Referring back to fig. 2, the backlight module 100 includes a plurality of wave-shaped flexible structures 140, such as two wave-shaped flexible structures 140, and the two wave-shaped flexible structures 140 are respectively disposed between two adjacent side surfaces 122 of the light guide plate 120 and two adjacent side surfaces 112 of the light guide plate. For example, in the present embodiment, the two wave-shaped flexible structures 140 respectively abut against the second side 1222 and the third side 1223 of the light guide plate 120. In other embodiments, the two wave-shaped flexible structures 140 can respectively abut against the second side 1222 and the fourth side 1224 of the light guide plate 120, as long as the sides on which the light sources 180 are located are avoided.

Referring to fig. 2 and 13, the main difference between the backlight module 100 of the present embodiment and the backlight module 100C is that the number of the wavy flexible structures 140C of the backlight module 100C is one, and the wavy flexible structures 140C are disposed between one of the side surfaces 122 of the light guide plate 120 and a corresponding one of the side plate portions 112. For example, the wave-shaped flexible structure 140C is disposed between the second side 1222 of the light guide plate 120 and the corresponding second side plate portion 1122, in other words, the wave-shaped flexible structure 140C is located at the opposite side of the light source 180, and the light guide plate 120 is located between the wave-shaped flexible structure 140C and the light source 180, but the invention is not limited thereto.

Referring to fig. 2 and fig. 14, a main difference between the backlight module 100 of the present embodiment and the backlight module 100D is that the two wave-shaped flexible structures 140 are different from the two wave-shaped flexible structures 140D in configuration. As shown in fig. 14, one of the wave-shaped flexible structures 140D is disposed between the third side 1223 of the light guide plate 120 and the corresponding third side plate 1123, and the other wave-shaped flexible structure 140D is disposed between the fourth side 1223 of the light guide plate 120 and the corresponding fourth side plate 1124.

It should be noted that the two wave-shaped flexible structures 140D are symmetrically formed on the reflective plate 130. Therefore, the two wave-shaped flexible structures 140D can respectively abut against the third side 1223 and the opposite fourth side 1223 of the light guide plate 120, so that the light guide plate 120 is clamped between the two wave-shaped flexible structures 140D.

Referring to fig. 2 and fig. 15, the main difference between the backlight module 100 of the present embodiment and the backlight module 100E is that the number of the wavy flexible structures 140E of the backlight module 100E can be three, and two wavy flexible structures 140E are respectively disposed between three adjacent ones of the side surfaces 122 of the light guide plate 120 and three adjacent ones of the corresponding side plate portions 112, so that the light guide plate 120 is well fixed in the backlight module 100E.

In summary, the embodiments of the present invention have at least one of the following advantages or effects. In the design of the backlight module of the present invention, the wavy flexible structure is disposed between the side surface of the light guide plate and the corresponding side plate portion. When the light guide plate expands or contracts, the wavy flexible structure is correspondingly deformed and continuously props against the side face of the light guide plate. Therefore, the utility model discloses a compressible deformation that backlight unit permeable wavy flexible structure had and the ability of recoverable, even if under the condition of expend with heat and contract with cold, the light guide plate also still is well fixed. Therefore, the backlight module of the present invention has good optical quality and can prevent abnormal noise caused by vibration. Furthermore, adopt the utility model discloses a backlight module's display can still have good display quality when expend with heat and contract with cold.

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereto, and all the simple equivalent changes and modifications made according to the claims and the contents of the present invention are still included in the scope of the present invention. Moreover, it is not necessary for any embodiment or claim to address all of the objects, advantages, or features disclosed herein. In addition, the abstract and the utility model name are only used for assisting the retrieval of patent documents and are not used for limiting the scope of the invention. Furthermore, the terms "first", "second", and the like in the description or the claims are used only for naming elements (elements) or distinguishing different embodiments or ranges, and are not used for limiting the upper limit or the lower limit on the number of elements.

Description of reference numerals:

10 display

100. 100A, 100B, 100C, 100D, 100E backlight module

110 back plate

111 main board part

112 side plate part

1121 first side plate

1122, second side plate part

1123 third side plate part

1124 fourth side plate part

120 light guide plate

121 bottom surface

122 lateral surface

123 light-emitting surface

1221 first side face

1222 second side face

1223 third side face

1224 fourth side

130 reflecting plate

1301: first part

1302 a second part

140. 140A, 140B, 140C, 140D, 140E wave-shaped flexible structure

150 optical film group

151. 152, 153 optical film

160 the first adhesive layer

170 the second adhesive layer

180 light source

200 display panel

L1, L1', L2, L3 and L4.

Claims

1. A backlight module comprises a back plate, a light guide plate, a reflective plate and at least one wavy flexible structure, wherein:

the back plate comprises a main plate part and a plurality of side plate parts connected with the main plate part;

the light guide plate is arranged on the back plate and is provided with a bottom surface and a plurality of side surfaces connected with the bottom surface, wherein the bottom surface of the light guide plate faces the main plate part, and the side surfaces respectively face the side plate parts;

the reflecting plate is at least arranged between the bottom surface of the light guide plate and the main plate part of the back plate; and

the at least one wavy flexible structure is disposed between at least one of the side surfaces of the light guide plate and at least one of the corresponding side plate portions,

when the light guide plate expands or contracts, the at least one wavy flexible structure is correspondingly deformed to continuously abut against the at least one side surface of the light guide plate.

2. The backlight module of claim 1, wherein each of the corrugated flexible structures is formed by bending at least a portion of the reflection plate at a position beyond the bottom surface of the light guide plate.

3. The backlight module of claim 1, further comprising:

at least one first adhesive layer disposed between the at least one wave-shaped flexible structure and at least one of the corresponding side plate portions to fix the wave-shaped flexible structure to the back plate.

4. The backlight module of claim 1, wherein each of the corrugated flexible structures has a plurality of parallel folding lines, and a length of each of the corrugated flexible structures in an extending direction of the folding lines is the same as a length of the reflective plate in the extending direction of the folding lines.

5. The backlight module of claim 1, wherein each of the corrugated flexible structures has a plurality of parallel folding lines, and a length of each of the corrugated flexible structures in an extending direction of the folding lines is smaller than a length of the reflective plate in the extending direction of the folding lines.

6. The backlight module of claim 5, wherein the reflector plate comprises at least a first portion and at least a second portion at a position beyond the bottom surface of the light guide plate, the at least one corrugated flexible structure is formed by bending the at least one first portion, and the at least one second portion is folded to cover a portion of the at least one side surface of the light guide plate.

7. The backlight module of claim 6, further comprising:

and the second adhesive layer is arranged between the at least one second part and the covered at least one side surface so as to fix the reflecting plate on the light guide plate.

8. The backlight module of claim 1, wherein the at least one corrugated flexible structure comprises a plurality of corrugated flexible structures, and the plurality of corrugated flexible structures are disposed between two adjacent sides of the light guide plate and two adjacent sides of the corresponding side plate portions.

9. The backlight module of claim 1, wherein the at least one corrugated flexible structure comprises a plurality of corrugated flexible structures, and the plurality of corrugated flexible structures are disposed between adjacent three of the plurality of side surfaces of the light guide plate and adjacent three of the plurality of corresponding side plate portions.

10. A display, comprising a backlight module and a display panel, wherein:

the backlight module comprises a back plate, a light guide plate, a reflecting plate and at least one wavy flexible structure, wherein:

the light guide plate is arranged on the back plate and is provided with a light emitting surface, a bottom surface opposite to the light emitting surface and a plurality of side surfaces connected with the light emitting surface and the bottom surface, wherein the bottom surface of the light guide plate faces the main plate part, and the side surfaces face the side plate parts respectively;

the light guide plate is located between the display panel and the reflector plate, and when the light guide plate expands or contracts, the at least one wavy flexible structure is correspondingly deformed to continuously abut against the at least one side surface of the light guide plate.

11. The display of claim 10, wherein each of the corrugated flexible structures is formed by bending at least a portion of the reflection plate beyond the bottom surface of the light guide plate.

12. The display of claim 10, wherein the backlight module further comprises:

13. The display of claim 10, wherein each of the wave-shaped flexible structures has a plurality of parallel folding lines, and a length of each of the wave-shaped flexible structures in an extending direction of the folding lines is the same as a length of the reflection plate in the extending direction of the folding lines.

14. The display of claim 10, wherein each of the wave-shaped flexible structures has a plurality of parallel folding lines, and a length of each of the wave-shaped flexible structures in an extending direction of the folding lines is smaller than a length of the reflection plate in the extending direction of the folding lines.

15. The display of claim 14, wherein the reflective plate comprises at least a first portion and at least a second portion at a position beyond the bottom surface of the light guide plate, the at least one corrugated flexible structure is formed by bending the at least a first portion, and the at least a second portion is folded to cover a portion of the at least one side surface of the light guide plate.

16. The display of claim 15, wherein the backlight module further comprises:

17. The display of claim 10, wherein the at least one corrugated flexible structure comprises a plurality of corrugated flexible structures, and the plurality of corrugated flexible structures are disposed between two adjacent sides of the light guide plate and two adjacent sides of the corresponding side plate portions.

18. The display of claim 10, wherein the at least one corrugated flexible structure comprises a plurality of corrugated flexible structures, and the plurality of corrugated flexible structures are disposed between adjacent three of the plurality of side surfaces of the light guide plate and adjacent three of the plurality of corresponding side plate portions.