TWM612751U - Backlight module and display device - Google Patents

Abstract

A backlight module includes a back plate, a light guide plate, a reflecting plate, and at least one wave-shaped flexible structure. The back plate includes a main plate portion and a plurality of side plate portions connected to the main plate portion. The light guide plate is disposed on the back plate. The light guide plate has a bottom surface and a plurality of side surfaces connected to the bottom surface. The bottom surface of the light guide plate faces toward the main plate portion, and the side surfaces of the light guide plate respectively face toward the side plate portions. The reflecting plate is at least disposed between the bottom surface of the light guide plate and the main plate portion of the back plate. The at least one wave-shaped 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 wave-shaped flexible structure is adapted to correspondingly deform so as to continuously lean against the at least one of the side surfaces of the light guide plate. In addition, a display device including the aforementioned backlight module is also provided.

Description

Backlight module and display

The new creation relates to a backlight module and an optical device, and particularly relates to a backlight module and display with good reliability.

In order to respond to the dimensional changes caused by the thermal expansion and contraction of the light guide plate in the backlight module, the general backlight module usually plugs an elastic member such as foam, silicone or rubber in the gap between the light guide plate and the back plate to prevent During vibration, the light guide plate collides with the back plate and is damaged or produces abnormal noise.

However, in the current backlight module, the foam, silicone or rubber used to fix the light guide plate has the following deficiencies: (1) In terms of thickness, shape and elasticity, the foam has a standard thickness and shape and is relatively elastic. It is small and cannot be widely used in backlight modules of different sizes. Although silicone or rubber can be customized into different structures and have greater elasticity, the cost of customization is higher. (2) In terms of material characteristics, the foam is made of foam material, which has the risk of rubbing off the debris, and rubbing off the debris will affect the light output quality of the backlight module. Silicone or rubber has the phenomenon of oil release at high temperatures. Oil will damage the internal parts of the backlight module and shorten its service life.

The "prior art" paragraph is only used to help understand the content of the new creation. Therefore, the content disclosed in the "prior art" paragraph may contain some conventional technologies that do not constitute the common knowledge in the technical field. In the "prior art" The content disclosed in the paragraph does not represent the content or the problem to be solved by one or more embodiments of the creation of the present invention, and has been known or recognized by those with ordinary knowledge in the technical field before the application of the creation of the present invention.

This new creation provides a backlight module with good reliability.

The present invention provides a display with the above-mentioned backlight module.

The other purposes and advantages of the novel creation can be further understood from the technical features disclosed in the novel creation.

In order to achieve one or part or all of the above-mentioned objectives or other objectives, an embodiment of the present invention proposes a backlight module. The backlight module includes a back plate, a light guide plate, a reflective plate and at least one wave-shaped flexible structure. The backplane includes a main board part and a plurality of side board parts connected to the main board part. The light guide plate is arranged on the back plate and has a bottom surface and a plurality of side surfaces connected to the bottom surface. The bottom surface of the light guide plate faces the main board portion, and the multiple side surfaces face the multiple side plate portions, respectively. The reflecting plate is at least arranged between the bottom surface of the light guide plate and the main board portion of the back plate. At least one wave-shaped 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 wave-shaped flexible structure is adapted to correspondingly deform and continue to press against at least one side surface of the light guide plate.

In an embodiment of the present creation, each of the above-mentioned wave-shaped flexible structures is formed by bending at least a part of the reflecting plate at the position beyond the bottom surface of the light guide plate.

In an embodiment of the present invention, the above-mentioned backlight module further includes at least one first adhesive layer, which is disposed between at least one wave-shaped flexible structure and at least one of the corresponding side plate portions, so as to The wavy flexible structure is fixed on the back plate.

In an embodiment of the present creation, each of the above-mentioned wave-shaped flexible structures has multiple parallel fold lines. The length of each wave-shaped flexible structure in the extension direction of the fold lines is the same as the length of the reflector in the extension direction of the fold lines.

In an embodiment of the present creation, each of the above-mentioned wave-shaped flexible structures has multiple parallel fold lines. The length of each wave-shaped flexible structure in the extension direction of the fold lines is smaller than the length of the reflector in the extension direction of the fold lines.

In an embodiment of the present creation, the above-mentioned reflector plate includes at least a first part and at least a second part at a position beyond the bottom surface of the light guide plate. The at least one wave-shaped flexible structure is formed by bending at least one first part. At least one second part is folded to cover a part of at least one side surface of the light guide plate.

In an embodiment of the present invention, the above-mentioned backlight module further includes at least one second adhesive layer disposed between the at least one second part and the at least one side covered to fix the reflective plate to the light guide plate.

In an embodiment of the present invention, the aforementioned at least one wave-shaped flexible structure includes a plurality of wave-shaped flexible structures. The wave-shaped flexible structures are arranged between the adjacent two of the side surfaces of the light guide plate and the adjacent two of the corresponding side plate portions.

In an embodiment of the present invention, the aforementioned at least one wave-shaped flexible structure includes a plurality of wave-shaped flexible structures. The wave-shaped flexible structures are arranged between three adjacent ones of the side surfaces of the light guide plate and three adjacent ones of the corresponding side plate portions.

In order to achieve one or part or all of the above-mentioned objectives or other objectives, an embodiment of the present invention proposes a display. The display includes a backlight module and a display panel. The backlight module includes a back plate, a light guide plate, a reflective plate and at least one wave-shaped flexible structure. The backplane includes a main board part and a plurality of side board parts connected to the main board part. The light guide plate is arranged on the back plate. The light guide plate has a light emitting surface, a bottom surface opposite to the light emitting surface, and a plurality of side surfaces connected to the light emitting surface and the bottom surface. The bottom surface of the light guide plate faces the main board portion, and the multiple side surfaces face the multiple side plate portions, respectively. The reflecting plate is at least arranged between the bottom surface of the light guide plate and the main board portion of the back plate. At least one wave-shaped 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. The light guide plate is located between the display panel and the reflective plate, and when the light guide plate expands or contracts, the at least one wave-shaped flexible structure is adapted to correspondingly deform and continue to press against at least one side surface of the light guide plate.

In an embodiment of the present creation, each of the above-mentioned wave-shaped flexible structures is formed by bending at least a part of the reflecting plate at the position beyond the bottom surface of the light guide plate.

In an embodiment of the present invention, the above-mentioned backlight module further includes at least one first adhesive layer, which is disposed between at least one wave-shaped flexible structure and at least one of the corresponding side plate portions, so as to The wavy flexible structure is fixed on the back plate.

In an embodiment of the present creation, each of the above-mentioned wave-shaped flexible structures has multiple parallel fold lines. The length of each wave-shaped flexible structure in the extension direction of the fold lines is the same as the length of the reflector in the extension direction of the fold lines.

In an embodiment of the present creation, each of the above-mentioned wave-shaped flexible structures has multiple parallel fold lines. The length of each wave-shaped flexible structure in the extension direction of the fold lines is smaller than the length of the reflector in the extension direction of the fold lines.

In an embodiment of the present creation, the above-mentioned reflector plate includes at least a first part and at least a second part at a position beyond the bottom surface of the light guide plate. The at least one wave-shaped flexible structure is formed by bending at least one first part. At least one second part is folded to cover a part of at least one side surface of the light guide plate.

In an embodiment of the present invention, the above-mentioned backlight module further includes at least one second adhesive layer disposed between the at least one second part and the at least one side covered to fix the reflective plate to the light guide plate.

In an embodiment of the present invention, the aforementioned at least one wave-shaped flexible structure includes a plurality of wave-shaped flexible structures. The wave-shaped flexible structures are arranged between the adjacent two of the side surfaces of the light guide plate and the adjacent two of the corresponding side plate portions.

In an embodiment of the present invention, the aforementioned at least one wave-shaped flexible structure includes a plurality of wave-shaped flexible structures. The wave-shaped flexible structures are arranged between three adjacent ones of the side surfaces of the light guide plate and three adjacent ones of the corresponding side plate portions.

Based on the above, in the design of the backlight module created by the present invention, the wave-shaped flexible structure is arranged 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 adapted to deform correspondingly and continue to press against the side surface of the light guide plate. As a result, the backlight module of the present invention can pass through the compressible deformation and recoverable ability of the wave-shaped flexible structure, and the light guide plate is still well fixed even in the case of thermal expansion and contraction. Therefore, the backlight module created by the present invention can have good optical quality and can prevent abnormal sound caused by vibration.

In order to make the above-mentioned features and advantages of the new creation more obvious and understandable, the following specific examples are given in conjunction with the accompanying drawings to describe in detail as follows.

The aforementioned and other technical content, features and effects of the creation of the new model will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. The directional terms mentioned in the following embodiments, for example: up, down, left, right, front or back, etc., are only directions for referring to the attached drawings. Therefore, the directional terms used are used to illustrate and not to limit the creation of the new model.

Fig. 1 is a schematic side view of a display according to an embodiment of the invention. Please refer to FIG. 1, the display 10 of this 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 it 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 three-dimensional schematic diagram of the backlight module of the display of FIG. 1. Please refer to FIGS. 1 to 3, the backlight module 100 of this 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 this 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 is located 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 FIGS. 1 and 2, in this embodiment, the bottom surface 121 of the light guide plate 120 faces the main plate portion 111 of the back plate 110, and the multiple side surfaces 122 of the light guide plate 120 face the multiple sides of the back plate 110, respectively. One side plate 112. The reflective plate 130 is disposed between the bottom surface 121 of the light guide plate 120 and the main plate portion 111 of the back plate 110. The backlight module 100 includes, for example, 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 portion 112 of the back plate 110. The backlight module 100 further includes a light source 180 which faces one of the side surfaces 122 of the light guide plate 120 (the left side in FIG. 1 and the upper side in FIG. 2 ). In addition, the backlight module 100 may further include an optical film set 150 (shown in FIG. 1) to adjust the light output effect of the backlight module 100, and the optical film set 150 is located between the display panel 200 and the light guide plate 120. It should be noted that the backlight module 100 in FIG. 2 omits the illustration of the optical film set 150 to clearly show the light guide plate 120.

Furthermore, as shown in FIGS. 1 and 2, in this embodiment, the multiple 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.部1124. The first side plate portion 1121 and the second side plate portion 1122 are opposed to each other, and the third side plate portion 1123 and the fourth side plate portion 1124 are opposed to 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 this embodiment, the multiple side surfaces 122 of the light guide plate 120 include a first side surface 1221, a second side surface 1222, a third side surface 1223, and a fourth side surface 1224. The first side 1221, the second side 1222, the third side 1223, and the fourth side 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 of the back plate 110, respectively部1124.

In this embodiment, one of the wave-shaped flexible structures 140 is disposed between the second side surface 1222 of the light guide plate 120 and the corresponding second side plate portion 1122 of the back plate 110. The other wave-shaped flexible structure 140 is disposed between the third side plate portion 1123 of the light guide plate 120 and the corresponding third side surface 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.

4 is a three-dimensional schematic diagram of the reflective plate and the wave-shaped flexible structure of the backlight module of FIG. 3. Fig. 5 is a partial cross-sectional view of the backlight module of Fig. 3 taken along the A-A section line in side view. Please refer to FIG. 5 first. In this embodiment, the optical film set 150 includes, for example, an optical film 151, an optical film 152, and an optical film 153 stacked on each other. The optical film group 150 is disposed on the light guide plate 120. The optical film sheets 151, 152, and 153 may include, for example, a diffuser sheet, an optical brightness enhancement film, a wavelength conversion film, a thin sheet, a composite sheet, and the like. It should be noted that the creation of the present new type does not limit the type, number and configuration of optical films in the optical film set 150. Those with ordinary knowledge in the art can adjust the optical film set according to the required optical effects. Types, quantity and configuration of optical films in 150.

4 and 5, the two wavy flexible structures 140 of the backlight module 100 of this embodiment are formed by bending at least a part of the reflective plate 130 beyond the bottom surface 121 of the light guide plate 120, for example.

In detail, as shown in FIG. 4, in this embodiment, the two wavy flexible structures 140 respectively have multiple parallel fold lines. The length L1 of one of the wavy flexible structures 140 in the extension direction of the fold lines is the same as the length L2 of the reflector 130 in the extension direction of the fold lines. The length L3 of the other wave-shaped flexible structure 140 in the extension direction of the fold lines is the same as the length L4 of the reflector 130 in the extension direction of the fold lines.

In addition, referring to FIG. 2 and FIG. 5, the backlight module 100 of this embodiment further includes at least one first adhesive layer 160, for example, 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 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 tape, but the invention is not limited to this.

Therefore, as shown in FIG. 2, in this embodiment, the first side surface 1221 and the fourth side surface 1224 of the light guide plate 120 abut against the first side plate portion 1121 and the fourth side plate portion 1124 of the back plate 110, respectively. At the same time, the two wavy flexible structures 140 respectively press against the second side surface 1222 and the third side surface 1223 of the light guide plate 120, so that the configuration can make the multiple side surfaces 122 of the light guide plate 120 be well fixed to the backlight module 100 in.

It is worth mentioning that, in this embodiment, compared to the conventional foam, silicone or rubber for fixing the light guide plate, the folding number of the wavy flexible structure formed by the bending of the reflector plate can be adjusted according to the requirements. The size and elasticity can be universally used for backlight modules with different frame widths. In addition, since the wavy 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, silicone or rubber. Therefore, the backlight module with the wavy flexible structure can not only reduce the production cost, but also can avoid the problem of material deterioration of the fixing member due to high temperature environment and the problem of rubbing off the debris and polluting the internal components of the backlight module.

6A is a partial cross-sectional side view of the light guide plate of the backlight module of FIG. 5 when it is expanded. 6B is a partial cross-sectional side view of the light guide plate of the backlight module of FIG. 5 when the light guide plate is contracted. Please refer to FIG. 2, FIG. 5, FIG. 6A and FIG. 6B at the same time. In this embodiment, the wave-shaped flexible structure 140 has a special structure design. When the light guide plate 120 expands (for example, expands when heated) or contracts (for example, shrink when exposed to cold) ), the light guide plate 120 can still be well fixed. In the following, one of the wave-shaped flexible structures 140 located between the second side surface 1222 of the light guide plate 120 and the second side plate portion 1122 of the back plate 110 will be described.

As shown in FIGS. 5 and 6A, in this embodiment, when the light guide plate 120 of the backlight module 100 expands due to heat, the second side surface 1222 of the light guide plate 120 will move toward the second side plate portion 1122 of the back plate 110. mobile. The wavy flexible structure 140 is pushed and pressed by the light guide plate 120 to be compressed and deformed. At this time, the compressed and deformed wave-shaped flexible structure 140 can still continue to press against the second side surface 1222 of the light guide plate 120, and the light guide plate 120 can be fixed well.

As shown in FIG. 6B, in this embodiment, when the light guide plate 120 of the backlight module 100 shrinks under cold conditions, the second side surface 1222 of the light guide plate 120 will move away from the second side plate portion 1122 of the back plate 110. At this time, the wave-shaped flexible structure 140 will continue to press against the second side surface 1222 of the light guide plate 120 due to its own elastic restoring force, so as to fix the light guide plate 120 well.

Other embodiments will be listed below for description. It must be noted here that the following embodiments use the element numbers and part of the content of the foregoing embodiments, wherein the same numbers are used to represent the same or similar elements, and the description of the same technical content is omitted. The different features of each embodiment can be applied to other embodiments in principle. 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 three-dimensional schematic diagram of a backlight module according to another embodiment of the present invention. FIG. 8 is a three-dimensional schematic diagram of the reflective plate and the wave-shaped flexible structure of the backlight module of FIG. 7. Fig. 9A is a side partial cross-sectional view of the backlight module of Fig. 7 along the A-A section line. Fig. 9B is a side partial cross-sectional view of the backlight module of Fig. 7 along the B-B section line. Please refer to FIGS. 7-9B. The main difference between the backlight module 100A of this embodiment and the backlight module 100 of the previous embodiment lies in the distribution type and quantity of the wave-shaped flexible structure 140A of the backlight module 100A and the backlight mode The distribution patterns and numbers of the wave-shaped flexible structures 140 of the group 100 are different.

As shown in FIGS. 7 to 9B, in this embodiment, the three wavy flexible structures 140A are formed by bending a part of the reflective plate 130 beyond the bottom surface 121 of the light guide plate 120. The cross-section of FIG. 9A shows a portion where the reflector 130 is bent into a wavy flexible structure 140A. The cross section of FIG. 9B shows that the reflector 130 does not extend beyond the bottom surface 121 of the light guide plate 120. Furthermore, the edge of the reflector 130 in this part is substantially flush with the second side surface 1222 of the light guide plate 120.

In detail, as shown in FIG. 8, in this embodiment, the three wave-shaped flexible structures 140A respectively have multiple parallel fold lines, and the three wave-shaped flexible structures 140A are all in the extending direction of the fold lines. Is the length L1'. The reflector 130 has a length L2 and a length L4 in the extension direction of the fold lines, respectively. The length L1' of the plurality of wavy flexible structures 140A in the extension direction of the fold lines is less than the length L2 and the length L4 of the reflector plate in the extension direction of the fold lines.

In this embodiment, two of the three wave-shaped flexible structures 140A are respectively located between the second side surface 1222 of the light guide plate 120 and the second side plate portion 1122 of the back plate 110, and the other is located on the light guide plate 120 Between the third side surface 1223 and the third side plate portion 1123 of the back plate 110 (the relative positions of the second side surface 1222, the third side surface 1223, the second side plate portion 1122 and the third side plate portion 1123 can refer to FIG. 2). It should be noted that the present invention does not limit the number of wave-like flexible structures 140A located between one of the side surfaces 122 of the light guide plate 120 and one of the corresponding side plate portions 112 of the back plate 110.

In this embodiment, in addition to adjusting the number of folds of the wave-shaped flexible structure 140A, the backlight module 100A can also adjust the number of multiple wave-shaped flexible structures 140A and the length in the extending direction of the fold lines. , Control the elasticity of the multiple wave-shaped flexible structures 140A. Moreover, since the length of the wave-shaped flexible structure 140A in the extension direction of the fold lines is less than the length of the reflector plate in the extension direction of the fold line, the punching and forming of the reflector plate 130 into a plurality of wave-shaped flexible structures 140A can be reduced. The difficulty of homework.

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

Please refer to FIGS. 10 to 12B. The main difference between the backlight module 100B of this embodiment and the backlight module 100A of the previous embodiment is that the reflective plate 130 of the backlight module 100B is located beyond the bottom surface 121 of the light guide plate 120. It has a part that can be folded to cover the light guide plate 120.

As shown in FIGS. 11 to 12B, in this embodiment, the reflector 130 includes three first parts 1301 and five second parts 1302 at a position beyond the bottom surface 121 of the light guide plate 120, and three wavy flexible structures 140B It is formed by bending the three first parts 1301, and the five second parts 1302 can be folded upward to respectively cover the second side surface 1222 and the third side surface 1223 of the light guide plate 120 (the second side surface 1222 and the third side surface 1223). Refer to Figure 2 for the relative position of.

In detail, as shown in FIGS. 10 to 12B, the backlight module 100B of this embodiment further includes at least one second adhesive layer 170, for example, five second adhesive layers 170. Three of the second adhesive layers 170 are respectively disposed between the three second portions 1302 and the second side surface 1222 covered by the light guide plate 120, and the other two second adhesive layers 170 are respectively disposed on the other two second sides. Between the portion 1302 and the third side surface 1223 covered by the light guide plate 120 (the relative position of the second side surface 1222 and the third side surface 1223 can refer to FIG. 2) to fix the reflective plate 130 to the light guide plate 120. Moreover, in this embodiment, the second adhesive layer 170 is, for example, a double-sided tape, but the invention does not limit the material and type of the second adhesive layer 170.

That is, as shown in FIG. 11, in this embodiment, the reflector 130 may form a plurality of second portions 1302 that are inserted into the wave-shaped flexible structure outside the first portion 1301 where the three wave-shaped flexible structures 140B are formed. Between 140B. Therefore, the second portion 1302 of the reflective plate 130 is fixed to the multiple sides 122 of the light guide plate 120 by the second adhesive layer 170, which can prevent the light guide plate 120 from being displaced upward to the hypotenuse of the wave-shaped flexible structure 140B due to thermal expansion. Therefore, 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. 15 is a schematic top view of a backlight module according to another embodiment of the present invention. It should be noted that the backlight module 100C, the backlight module 100D, and the backlight module 100E in FIGS. 13, 14 and 15 omit the illustration of the optical film set 150 to clearly show the light guide plate 120.

Please return to FIG. 2 first, the backlight module 100 includes a plurality of wave-shaped flexible structures 140, for example, two wave-shaped flexible structures 140, and the two wave-shaped flexible structures 140 are respectively disposed on the side surfaces of the light guide plate 120 Between two adjacent ones of 122 and the corresponding two adjacent ones of the side plate portions 112. For example, in this embodiment, the two wavy flexible structures 140 respectively abut against the second side surface 1222 and the third side surface 1223 of the light guide plate 120. In other embodiments, the two wavy flexible structures 140 can respectively abut against the second side surface 1222 and the fourth side surface 1224 of the light guide plate 120 as long as they avoid the side surface where the light source 180 is located.

2 and 13 at the same time, the main difference between the backlight module 100 and the backlight module 100C of this embodiment is that the number of the wave-shaped flexible structure 140C of the backlight module 100C is one, and the wave-shaped flexible structure 140C It is arranged between one of the side surfaces 122 of the light guide plate 120 and one of the corresponding side plate portions 112. For example, the wave-shaped flexible structure 140C is disposed between the second side surface 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 on the opposite side of the light source 180, The light plate 120 is located between the wavy flexible structure 140C and the light source 180, but the creation of the present invention is not limited to this.

2 and 14 at the same time, the main difference between the backlight module 100 and the backlight module 100D of this embodiment is that the two wave-shaped flexible structures 140 and the two wave-shaped flexible structures 140D are arranged differently. As shown in FIG. 14, one of the wave-shaped flexible structures 140D is disposed between the third side surface 1223 of the light guide plate 120 and the corresponding third side plate portion 1123, and the other wave-shaped flexible structure 140D is disposed on the light guide plate 120. Between the fourth side surface 1223 and the corresponding fourth side plate portion 1124.

It is worth mentioning that the two wavy flexible structures 140D are formed on the reflector 130 in a symmetrical manner. Therefore, the two wave-shaped flexible structures 140D can respectively press against the third side surface 1223 and the opposite fourth side surface 1223 of the light guide plate 120, so that the light guide plate 120 is clamped between the two wave-shaped flexible structures 140D.

Please refer to FIGS. 2 and 15 at the same time. The main difference between the backlight module 100 and the backlight module 100E of this embodiment is that the number of wavy flexible structures 140E of the backlight module 100E can be three, and two wavy structures The flexible structure 140E is respectively disposed between three adjacent ones of the side surfaces 122 of the light guide plate 120 and the corresponding three adjacent ones of the side plate portions 112, so that the light guide plate 120 is well fixed to the backlight module In 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 wave-shaped flexible structure is arranged 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 adapted to deform correspondingly and continue to press against the side surface of the light guide plate. As a result, the backlight module of the present invention can pass through the compressible deformation and recoverable ability of the wave-shaped flexible structure, and the light guide plate is still well fixed even in the case of thermal expansion and contraction. Therefore, the backlight module created by the present invention can have good optical quality and can prevent abnormal sound caused by vibration. In addition, the display using the backlight module created by the new invention can still have good display quality even when it expands and contracts with heat.

However, the above-mentioned are only the preferred embodiments of the creation of the new model, and should not be used to limit the scope of implementation of the creation of the new model, that is, the simple equivalent changes and changes made in accordance with the scope of the patent application and the description of the new model Modifications are still within the scope of the new creation patent. In addition, any embodiment of the new creation or the scope of the patent application does not have to achieve all the objectives or advantages or features disclosed in the new creation. In addition, the abstract part and title are only used to assist the search of patent documents, not to limit the scope of rights of the creation of the new model. In addition, the terms "first" and "second" mentioned in this specification or the scope of the patent application are only used to name the element (element) or to distinguish different embodiments or ranges, and are not used to limit the number of elements. Upper or lower limit.

10: display 100, 100A, 100B, 100C, 100D, 100E: backlight module 110: Backplane 111: Motherboard Department 112: side panel 1121: The first side plate 1122: second side plate 1123: The third side panel 1124: The fourth side plate 120: light guide plate 121: Bottom 122: side 123: Glossy Surface 1221: first side 1222: second side 1223: third side 1224: fourth side 130: reflector 1301: Part One 1302: Part Two 140, 140A, 140B, 140C, 140D, 140E: wave-like flexible structure 150: Optical film set 151, 152, 153: optical diaphragm 160: The first adhesive layer 170: second adhesive layer 180: light source 200: display panel L1, L1', L2, L3, L4: length.

Fig. 1 is a schematic side view of a display according to an embodiment of the invention. FIG. 2 is a schematic top view of a backlight module of the display of FIG. 1. FIG. 3 is a three-dimensional schematic diagram of the backlight module of the display of FIG. 1. 4 is a three-dimensional schematic diagram of the reflective plate and the wave-shaped flexible structure of the backlight module of FIG. 3. Fig. 5 is a partial cross-sectional view of the backlight module of Fig. 3 taken along the A-A section line in side view. 6A is a partial cross-sectional side view of the light guide plate of the backlight module of FIG. 5 when it is expanded. 6B is a partial cross-sectional side view of the light guide plate of the backlight module of FIG. 5 when the light guide plate is contracted. FIG. 7 is a three-dimensional schematic diagram of a backlight module according to another embodiment of the present invention. FIG. 8 is a three-dimensional schematic diagram of the reflective plate and the wave-shaped flexible structure of the backlight module of FIG. 7. Fig. 9A is a side partial cross-sectional view of the backlight module of Fig. 7 along the A-A section line. Fig. 9B is a side partial cross-sectional view of the backlight module of Fig. 7 along the B-B section line. FIG. 10 is a three-dimensional schematic diagram of a backlight module according to another embodiment of the present invention. FIG. 11 is a three-dimensional schematic diagram of the reflective plate and the wave-shaped flexible structure of the backlight module of FIG. 10. Fig. 12A is a side partial cross-sectional view of the backlight module of Fig. 10 along the A-A section line. Fig. 12B is a side partial cross-sectional view of the backlight module of Fig. 10 along the B-B section line. 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. 15 is a schematic top view of a backlight module according to another embodiment of the present invention.

10: display

100: Backlight module

110: Backplane

111: Motherboard Department

112: side panel

120: light guide plate

121: Bottom

122: side

123: Glossy Surface

130: reflector

140: wavy flexible structure

150: Optical film set

180: light source

200: display panel

Claims (18)

A backlight module includes: A back board, including a main board part and a plurality of side board parts connected to the main board part; A light guide plate disposed on the back plate and having a bottom surface and a plurality of side surfaces connected to the bottom surface, wherein the bottom surface of the light guide plate faces the main board portion, and the side surfaces respectively face the side plate portions; A reflective plate at least disposed between the bottom surface of the light guide plate and the main board portion of the back plate; and 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, wherein When the light guide plate expands or contracts, the at least one wave-shaped flexible structure is adapted to correspondingly deform to continuously press against the at least one side surface of the light guide plate. The backlight module according to claim 1, wherein each of the wave-shaped flexible structures is formed by bending at least a part of the reflecting plate at a position beyond the bottom surface of the light guide plate. The backlight module according to claim 1, further including: At least one first adhesive layer is arranged 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. The backlight module according to claim 1, wherein each of the wave-shaped flexible structures has a plurality of parallel fold lines, and the length of each wave-shaped flexible structure in the extension direction of the fold lines is the same as that of the reflecting plate in the The length of these fold lines in the extension direction. The backlight module according to claim 1, wherein each of the wave-shaped flexible structures has a plurality of parallel fold lines, and the length of each wave-shaped flexible structure in the extension direction of the fold lines is less than that of the reflective plate in the direction of extension of the fold lines. The length of the fold line in the extension direction. The backlight module according to claim 5, wherein the reflective plate includes at least one first part and at least one second part at a position beyond the bottom surface of the light guide plate, and the at least one wavy flexible structure is formed by the at least one The first part is folded, and the at least one second part is folded to cover a part of the at least one side surface of the light guide plate. The backlight module according to claim 6, further including: At least one second adhesive layer is disposed between the at least one second part and the covered at least one side surface to fix the reflective plate to the light guide plate. The backlight module according to claim 1, wherein the at least one wave-shaped flexible structure includes a plurality of wave-shaped flexible structures, and the wave-shaped flexible structures are disposed on two adjacent ones of the side surfaces of the light guide plate. Between two adjacent ones of the corresponding side plate portions. The backlight module according to claim 1, wherein the at least one wave-shaped flexible structure includes a plurality of wave-shaped flexible structures, and the wave-shaped flexible structures are disposed on three adjacent ones of the side surfaces of the light guide plate. Between the three adjacent ones of the corresponding side plate parts. A display including: A backlight module, including: A back board, including a main board part and a plurality of side board parts connected to the main board part; A light guide plate is disposed on the back plate and has a light exit surface, a bottom surface opposite to the light exit surface, and a plurality of side surfaces connected to the light exit surface and the bottom surface, wherein the bottom surface of the light guide plate faces the main board portion , The side surfaces respectively face the side plate parts; A reflective plate at least disposed between the bottom surface of the light guide plate and the main board portion of the back plate; and 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, and A display panel in which The light guide plate is located between the display panel and the reflective plate, and when the light guide plate expands or contracts, the at least one wave-shaped flexible structure is adapted to deform correspondingly to continuously press against the at least one side surface of the light guide plate. The display according to claim 10, wherein each of the wave-shaped flexible structures is formed by bending at least a part of the reflecting plate at a position beyond the bottom surface of the light guide plate. The display according to claim 10, wherein the backlight module further includes: At least one first adhesive layer is arranged 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. The display according to claim 10, wherein each of the wave-shaped flexible structures has a plurality of parallel fold lines, and the length of each wave-shaped flexible structure in the extension direction of the fold lines is the same as that of the reflector in the fold lines The length in the direction of extension. The display according to claim 10, wherein each of the wave-shaped flexible structures has a plurality of parallel fold lines, and the length of each wave-shaped flexible structure in the extension direction of the fold lines is less than the length of the reflector in the fold lines The length in the extension direction. The display according to claim 14, wherein the reflective plate includes at least one first part and at least one second part at a position beyond the bottom surface of the light guide plate, and the at least one wave-shaped flexible structure is formed by the at least one first part The at least one second part is folded to cover a part of the at least one side surface of the light guide plate. The display according to claim 15, wherein the backlight module further includes: At least one second adhesive layer is disposed between the at least one second part and the covered at least one side surface to fix the reflective plate to the light guide plate. The display according to claim 10, wherein the at least one wave-shaped flexible structure includes a plurality of wave-shaped flexible structures, and the wave-shaped flexible structures are disposed on two adjacent ones of the side surfaces of the light guide plate. Between two adjacent ones of the corresponding side plate parts. The display according to claim 10, wherein the at least one wave-shaped flexible structure includes a plurality of wave-shaped flexible structures, and the wave-shaped flexible structures are disposed on three adjacent ones of the side surfaces of the light guide plate. Between the adjacent three of the corresponding side plate parts.

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