TWI844954B - Backlight module and display device comprising the same - Google Patents

Abstract

A backlight module is described, which includes a back cover, a light guide element, a film, a front frame, and a cap. The inner side wall of the back cover defines a first space and forms a recess. The light guide element is accommodated in the first space. The film is accommodated in the first space and disposed on the light guide element. The first portion of the front frame is attached to the back cover, at least a portion of the light guide element and the film is covered by the second portion of the front frame, and an opening of the front frame is formed in the second portion. The cap is engaged in the opening and in the recess. A first extension portion of the cap passes through the opening of the front frame, and the second extension portion of the cap extends between the front frame and the film.

Description

Backlight module and display device including the backlight module

The present invention relates to a backlight module and a display device including the backlight module, and in particular to a backlight module with a limitable film and a light guide element and a display device including the backlight module.

Generally, a liquid crystal display mainly includes a backlight module and a liquid crystal display panel. A light guide plate and an optical film are provided between the outer frame and the back panel of the backlight module. The liquid crystal display panel is fixed to the backlight module via adhesive provided on the adhesive side of the liquid crystal display.

In current technology, the optical film is fixed to the side wall of the back panel or the light guide plate in a stepped shape. Most light guide plates use two L-shaped fixings located on the left and right sides of the backlight module to buffer the expansion and fix the position, and the film is fixed to the back panel using double-sided tape. However, since the attachment surface of the double-sided tape depends on the width of the attachment point of the back panel, the attachment area is easily limited, resulting in a smaller area and poor fixation. In addition, there is a gap between the current optical film and the outer frame, which may cause the optical film to jump off or the friction between the optical film and the light guide plate may cause scratches on the luminous surface, affecting the luminous quality. Therefore, when the optical film and the light guide plate shake in the back panel, there may be many defects such as scratch risk and bad noise due to friction between the optical film and the light guide plate.

Therefore, one of the purposes of the present invention is to provide a backlight module that strengthens the relative position between the fixed optical film and the light guide element, and a display device including the backlight module.

According to the above-mentioned purpose of the present invention, a backlight module is proposed. The backlight module includes a carrier, a light guide element, a diaphragm, a front frame, and at least one limiting cover. The carrier includes a first accommodating space and an inner side wall. The inner side wall surrounds and defines the first accommodating space and forms a limiting groove. The light guide element is accommodated in the first accommodating space. The diaphragm is accommodated in the first accommodating space and is arranged on the light guide element. The front frame includes a first part, a second part, and an opening. The first part is combined with the carrier. At least a part of the light guide element and the diaphragm is covered by the second part. The opening is formed in the second part. The limiting cover is embedded in the opening and the limiting groove, and includes a first extension part and a second extension part. The first extension part passes through the opening of the front frame, and the second extension part extends between the front frame and the diaphragm.

According to one embodiment of the present invention, the above-mentioned light guide element includes a light guide element lug and at least one positioning post. The positioning post is arranged on the light guide element lug. The diaphragm includes a diaphragm lug and at least one positioning hole. The positioning hole is arranged on the diaphragm lug. The diaphragm is positioned on the positioning post of the light guide element through the positioning hole.

According to another embodiment of the present invention, the above-mentioned limiting cover includes a second accommodating space, so that the second accommodating space accommodates the light guide element lug.

According to another embodiment of the present invention, the second accommodation space of the above-mentioned limiting cover accommodates the positioning column of the light-guiding element.

According to another embodiment of the present invention, the second accommodation space of the above-mentioned limiting cover accommodates the diaphragm lug.

According to another embodiment of the present invention, the second accommodation space of the above-mentioned limiting cover accommodates the positioning hole of the diaphragm.

According to another embodiment of the present invention, the above-mentioned limiting cover is embedded between the inner wall and the light-guiding element.

According to another embodiment of the present invention, the second extension portion is arranged along the film in the direction of the light-guiding element to press the film.

According to the above-mentioned purpose of the present invention, a display device is proposed. The display device includes the above-mentioned backlight module and a display panel. The display panel is arranged above the backlight module.

According to one embodiment of the present invention, the above-mentioned front frame carries the display panel.

According to another embodiment of the present invention, the above-mentioned display device further includes a limiting cover side and at least one adhesive side. The display panel is fixed on the backlight module via an adhesive disposed on the adhesive side.

According to another embodiment of the present invention, the above-mentioned limiting cover disposed on the side of the limiting cover passes through the opening and directly contacts the display panel to support the display panel.

As can be seen from the above, the present invention simultaneously presses the diaphragm and the light guide element through the second extension of the limit cover, thereby limiting the degree of shaking of the diaphragm and the light guide element inside the carrier, and also avoiding the risk of scratches and bad noise caused by the friction between the diaphragm and the light guide element. The opening on the surface of the front frame close to the display panel allows the first extension of the limit cover to pass through the opening, and the limit cover replaces the adhesive to carry the display panel.

10: Display device

10A: Display plane

11: Limit cover side

12: Paste side

12A: Adhesive

13: Paste side

13A: Adhesive

14: Paste side

14A: Adhesive

100: Backlight module

110: Carrier

111: First storage space

113: Limiting slot

115: medial wall

116: Outer wall

120: Light-guiding element

121: Light guide element lug

122A: First positioning column

122B: Second positioning column

123: Surface

130: Diaphragm

130A: Diaphragm

130B: Diaphragm

130C: Diaphragm

131: Diaphragm lug

132A: First positioning hole

132B: Second positioning hole

140:Front frame

141: Part 1

142: Part 2

142A: Inner surface

142B: External surface

143: Open mouth

144: Gap

150: Limit cover

151: First extension part

152: Second extension

153: Cover the wall

154: Cover the wall

155: Cover the wall

156: Second storage space

200: Display panel

In order to more fully understand the embodiments and their advantages, the following description is made in conjunction with the attached drawings, wherein: [Figure 1] is a schematic diagram of an exploded display device according to the first embodiment of the present invention; [Figure 2] is an enlarged schematic diagram of a position limiting cover according to [Figure 1]; [Figure 3] is a schematic diagram of a combination of a carrier, a light guide element, a plurality of membranes, a front frame, and a position limiting cover according to [Figure 1], and a partial cross-sectional view cut along the A-A’ section line of [Figure 1]; [Figure 4] is a schematic diagram of an exploded display device according to the second embodiment of the present invention.

Please refer to FIG. 1 , which is a schematic diagram of an exploded view of a display device according to the first embodiment of the present invention. The Z direction in FIG. 1 is the normal direction of the display plane 10A of the display device 10, or can also be regarded as the stacking direction of the backlight module 100 and the display panel 200. The X direction and the Y direction are parallel to the display plane 10A of the display device 10, and the X direction is perpendicular to the Y direction. The X direction and the Y direction are respectively perpendicular to the Z direction shown in FIG. 1 . The display device 10 of this embodiment at least includes a backlight module 100 and a display panel 200. The backlight module 100 of this embodiment can be mainly combined with the display panel 200 of the display device 10 to provide a backlight source for the display panel 200 of the display device 10. As shown in FIG1 , the backlight module 100 mainly includes a carrier 110, a light guide element 120, one or more films 130/130A/130B/130C, a front frame 140, and at least one limiting cover 150. The backlight module 100 can be combined with the display panel 200 (as shown in FIG3 ) through the front frame 140.

Please continue to refer to FIG. 1 . The support member 110 includes a bottom 112 and a side portion 114. The side portion 114 is disposed on the bottom 112 and the bottom 112 and the side portion 114 cooperate with each other to define a first accommodation space 111. The side portion 114 has an inner side wall 115 and an outer side wall 116. In an exemplary example, the support member 110 may be rectangular for exemplary purposes, but is not intended to limit the present invention. In an embodiment, the inner side wall 115 surrounds and defines the first accommodation space 111 to form a limiting groove 113. For example, the limiting groove 113 is formed by extending from the first accommodation space 111 toward the inner side wall 115, so that the first accommodation space 111 and the limiting groove 113 are connected to each other, and the first accommodation space 111 and the limiting groove 113 together form a convex space. The first accommodation space 111 and the limiting groove 113 can accommodate the light guide element 120, one or more films 130/130A/130B/130C, and at least one limiting cover 150.

For example, in some embodiments, the light guide element 120 may be a light guide plate (LGP) used in the backlight module 100. In an exemplary example, the shape of the light guide element 120 may correspond to the shape of the first accommodation space 111 and the limiting groove 113, and be accommodated in the first accommodation space 111 and the limiting groove 113. Or in some embodiments, one or more films 130/130A/130B/130C may be a variety of optical films used in the backlight module 100, such as a lower diffusion film. In an exemplary example, the shape of one or more films 130/130A/130B/130C may correspond to the shape of the first accommodation space 111 and the limiting groove 113, and be accommodated in the first accommodation space 111 and the limiting groove 113 and disposed on the light guide element 120.

For example, in one embodiment, the light-guiding element 120 includes a light-guiding element lug 121 extending outwardly along the Y direction to form a convex structure. When the light-guiding element 120 is roughly accommodated in the first accommodation space 111, the light-guiding element lug 121 is accommodated in the limiting groove 113. The size of the limiting groove 113 may be slightly larger than the size of the light-guiding element lug 121 to better correspond to the accommodation limit cover 150. The light-guiding element 120 may further include at least one positioning column disposed on the light-guiding element lug 121. In one embodiment, taking the diaphragm 130 as an example, the diaphragm 130 includes a diaphragm lug 131 extending outwardly along the Y direction to form a convex structure. In an exemplary example, when the diaphragm 130 is roughly accommodated in the first accommodation space 111, the diaphragm lug 131 is accommodated in the limiting groove 113. The size of the limiting groove 113 may be slightly larger than the size of the diaphragm lug 131. The diaphragm 130 may further include at least one positioning hole disposed on the diaphragm lug 131. The diaphragm 130 may be positioned by hanging on at least one positioning post of the light guide element 120 through at least one positioning hole.

In an exemplary example, as shown in FIG. 1 , the light guide element 120 may include two positioning posts, such as a first positioning post 122A and a second positioning post 122B, for illustrative purposes only and not intended to limit the present invention. The light guide element 120 may include more positioning posts as needed. In addition, in an exemplary example, as shown in FIG. 1 , the diaphragm 130 may include two positioning holes, such as a first positioning hole 132A and a second positioning hole 132B, for illustrative purposes only and not intended to limit the present invention. The first positioning hole 132A and the second positioning hole 132B are located on the surface 133 of the diaphragm 130. The diaphragm 130 may include more positioning holes as needed.

The first positioning post 122A and the second positioning post 122B are disposed on the surface 123 of the light guide element 120, and extend from the surface 123 of the light guide element 120 along the Z direction parallel to the normal line of the surface 123 of the light guide element 120. In an exemplary example, the shape of the positioning post of the light guide element 120 can be cylindrical for demonstration and explanation, and is not used to limit the present invention. In an exemplary example, the shape of the positioning hole of the diaphragm can be cylindrical for demonstration and explanation, and is not used to limit the present invention. The diaphragm 130 is disposed on the light guide element 120, so the shape, number or position of the positioning hole of the diaphragm 130 can be set corresponding to the shape, number or position of the positioning post of the light guide element 120. In an exemplary example, as shown in FIG. 1 , the film 130C may be located between the light guide element 120 and the carrier 110 . The film 130C at this location is generally referred to as a reflector.

The front frame 140 covers the limiting groove 113, the inner side wall 115 and part of the first accommodating space 111, and includes a first portion 141, a second portion 142 and an opening 143. The first portion 141 and the second portion 142 are arranged approximately perpendicular to each other, for example, the angle between the first portion 141 and the second portion 142 is approximately equal to 90 degrees, so that the first portion 141 extends along the Z direction and the second portion 142 extends along the Y direction. The first portion 141 is combined with the carrier 110. At least a portion of the light guide element 120 and one or more film sheets 130/130A/130B/130C, for example, the portion near the limiting groove 113, is covered by the second portion 142. In an exemplary example, the second portion 142 does not completely cover the light guide element 120 and one or more films 130/130A/130B/130C, but completely covers the light guide element lug 121, the first positioning column 122A, the second positioning column 122B, the film lug 131, the first positioning hole 132A and the second positioning hole 132B. The opening 143 is formed in the second portion 142, and connects the inner surface 142A and the outer surface 142B of the second portion 142, thereby exposing the convex space limit groove 113. In some embodiments, the inner surface 142A is different from the outer surface 142B.

The limiting cover 150 is disposed in the limiting groove 113 and includes a first extension portion 151 and a second extension portion 152. The size or shape of the limiting cover 150 roughly corresponds to the size or shape of the limiting groove 113, so that the limiting cover 150 can be embedded in the opening 143 and the limiting groove 113, or in other words, the opening 143 and the limiting groove 113 together accommodate the limiting cover 150. The first extension portion 151 and the second extension portion 152 are approximately perpendicular to each other, for example, the angle between the first extension portion 151 and the second extension portion 152 is approximately equal to 90 degrees, so that the first extension portion 151 extends along the Z direction, and the size, shape, number or position of the first extension portion 151 roughly corresponds to the size, shape, number or position of the opening 143, so that the first extension portion 151 can pass through the opening 143 of the front frame 140 along the Z direction. As for the second extension portion 152, it extends along the plane of the X direction and the Y direction to between the front frame 140 and the diaphragm 130B.

The backlight module 1 disclosed in this embodiment uses a limiting cover 150 to be embedded in the limiting groove 113 of the carrier 110, and cooperates with the first extension portion 151 of the limiting cover 150 to pass through the opening 143 of the front frame 140, so that the limiting cover 150 can be stably combined with the carrier 110 and the front frame 140 at the same time. In addition, the second extension portion 152 of the limiting cover 150 extends between the front frame 140 and the diaphragm 130, so that the gap between the front frame 140 and the diaphragm 130 can be filled by the second extension portion 152 of the limiting cover 150, so that the diaphragm 130 is not easy to jump off at this place, thereby achieving the purpose of reducing the risk of the diaphragm 130 jumping off at this place.

In an exemplary example, the position of the limit cover 150 can be set on one of the four sides of the carrier 110, for example, it can be set on a long side of the carrier 110. In one embodiment, the number of limit covers 150 in a backlight module 100 can be reduced to only one, and the single limit cover 150 is set at a position approximately in the middle of a side of the carrier 110, so the limit cover 150 does not need to be designed as an L-shape. In this way, the light guide element 120 can be fixed without setting two L-shaped fixing members, which can simplify the structure of the backlight module 100, reduce the number of components of the backlight module 100, and reduce the material cost or the manufacturing cost of the backlight module 100.

Fig. 2 is an enlarged schematic diagram of the limiting cover 150 according to Fig. 1. On a side of the limiting cover 150 away from the first extension portion 151, the cover wall 153, the cover wall 154, the cover wall 155 and the second extension portion 152 of the limiting cover 150 define a second accommodating space 156, so the limiting cover 150 includes the second accommodating space 156. The position of the second accommodating space 156 corresponds to the position of the light guide element lug 121 and the position of the diaphragm lug of the diaphragm 130/130A/130B/130C, for example, the position of the diaphragm lug 131, whereby the second accommodating space 156 accommodates the light guide element lug 121 and the diaphragm lug 131, accommodates at least one positioning column, for example, the first positioning column 122A and the second positioning column 122B, and also accommodates at least one positioning hole, for example, the first positioning hole 132A and the second positioning hole 132B. The limiting cover 150 can be made of a soft and elastic organic or inorganic material with a compression deformation property, thereby the limiting cover 150 can be tightly embedded in the opening 143 and the limiting groove 113, or embedded between the inner wall 115 and the light guide element 120. Therefore, the light guide element 120 will be limited by the limiting cover 150 and its movement range will be reduced, which can avoid the friction between the light guide element 120 and the diaphragm 130 during the reliability test or vibration experiment to cause scratches on the light-emitting surface, effectively maintain the light-emitting quality, and at the same time, it can also achieve the purpose of reducing the chance of foreign matter entering the backlight module 100. In an exemplary example, the limit cover 150 can be made of natural rubber, artificial rubber, elastic material or a combination thereof for demonstration purposes. It should be noted that the material of the limit cover 150 of this embodiment is not intended to limit the present invention. In other embodiments, the limit cover 150 can also be made of other different materials.

FIG3 is a schematic diagram showing the assembly of the carrier 110, the light guide element 120, the plurality of films 130/130A/130B/130C, the front frame 140, the stop cover 150 and the display panel 200 according to FIG1 , and a partial cross-sectional view cut along the A-A’ section line of FIG1 . Please refer to FIG1 , FIG2 and FIG3 , the light guide element 120, the plurality of films 130/130A/130B/130C, and the stop cover 150 are accommodated in the first accommodation space 111. For example, the first accommodation space 111 accommodates the film 130C, the light guide element 120, the film 130, the film 130A and the film 130B in sequence along the Z direction. The limiting cover 150 is disposed close to the inner wall 115 of the carrier 110, embedded between the inner wall 115 and the light guide element 120, and tightly accommodated in the limiting groove 113 extending from the first accommodation space 111, so that the light guide element 120 and the limiting cover 150 are mutually limited and engaged to reduce the movement range of the light guide element 120, which can avoid the friction between the light guide element 120 and the film 130 to cause scratches on the light-emitting surface, effectively maintain the light-emitting quality, and at the same time, achieve or reduce the opportunity for foreign matter to enter the backlight module 100. The first part 141 of the front frame 140 is disposed parallel to the outer wall 116 and is combined with the outer wall 116. The display panel 200 is disposed on the front frame 140 so that the front frame 140 bears at least part of the weight of the display panel 200. The inner surface 142A of the second portion 142 of the front frame 140 is connected to the second extension portion 152 of the limiting cover 150, and the outer surface 142B is connected to the display panel 200.

The first extension portion 151 of the limiting cover 150 can pass through the opening 143 of the front frame 140 along the Z direction to directly contact the display panel 200 to bear at least part of the weight of the display panel 200. For example, the first extension portion 151 of the limiting cover 150 can bear the weight of the display panel 200 together with the front frame 140. With this design, the limiting cover 150 can not only be stably combined with the supporting member 110 and the front frame 140 at the same time, but also use the first extension portion 151 to bear the display panel 200, so the limiting cover 150 has a unique composite structure effect. If there is a gap 144 between the light guide element 120 and the second portion 142 of the front frame 140, the second extension portion 152 extends along the plane of the X direction and the Y direction to between the front frame 140 and the diaphragm 130B, for example, to the gap 144. Thus, the second extension portion 152 can be filled into the gap 144, so that the gap between the front frame 140 and the diaphragm 130 can be filled by the second extension portion 152 of the limiting cover 150. The diaphragm 130 is not prone to the risk of jumping off at this point, and the friction between the light guide element 120 and the diaphragm 130 can be avoided to prevent scratches on the luminous surface, thereby effectively maintaining the luminous quality. At the same time, the second extension portion 152 filling the gap can also achieve or reduce the opportunity for foreign matter to enter the backlight module 100 through the gap. The second extension portion 152 can also cover the light guide element lug 121, the first positioning column 122A, the film lug 131, and the first positioning hole 132A in the Z direction. In an exemplary example, the first positioning column 122A is engaged with the first positioning hole 132A for illustration and is not intended to limit the present invention.

When the front frame 140 and the supporting member 110 are assembled, the front frame 140 can be tightly attached to the second extension portion 152 so that the second extension portion 152 can be set along the film in the direction of the light-guiding element 120, for example, along the Z direction, to press the film, such as pressing the film 130B, the film 130A, and the film 130, thereby achieving the purpose of limiting the shaking of the film in the first accommodating space 111. Furthermore, the second extension 152 indirectly presses the light guide element 120 by pressing the film, and limits the relative displacement between the film and the light guide element 120, thereby limiting the shaking of the film and the light guide element 120 in the first accommodation space 111, or reducing the friction between the film and the light guide element 120, causing the risk of scratching the light guide element 120 and affecting the luminous quality, or bad noise.

Please refer to FIG. 4, which is a schematic diagram of a display device according to the second embodiment of the present invention. The X direction, Y direction and Z direction in FIG. 4 correspond to the X direction, Y direction and Z direction shown in FIG. 1, respectively. The display device 10 further includes a limit cover side 11 and at least one adhesive side, such as a plurality of adhesive sides, and each at least one adhesive side is provided with at least one adhesive. For example, the adhesive can be a long strip, corresponding to the adhesive sides provided on the plurality of side edges of the display panel 200, respectively. In one example, the number of adhesive sides is three, and they are respectively provided on the three sides of the display panel 200 that are not close to the limit cover 150. Therefore, in an exemplary example, the display device 10 includes a limit cover side 11 close to the limit cover 150, and an adhesive side 12, an adhesive side 13, and an adhesive side 14 not close to the limit cover 150 for demonstration and explanation. The adhesive can be a double-sided adhesive tape for demonstration and explanation. It should be noted that the position arrangement of the limit cover side 11 and the adhesive side of this embodiment is not intended to limit the present invention. In other embodiments, the position of the limit cover side 11 and the adhesive side may also be different from the position of this embodiment.

The limiting cover side 11, the sticking side 12, the sticking side 13 and the sticking side 14 can be respectively parallel or perpendicular to the X direction or the Y direction of the display plane of the display panel 200. The limiting cover side 11 corresponds to the position where the limiting cover 150 is set on the backlight module 100, for example, corresponds to the long side of the backlight module 100 corresponding to the limiting groove 113. As long as the display device 10 is provided with adhesive sufficient to fix the display panel 200, some of the sticking sides may not be provided with adhesive, and the same purpose as above can be achieved, so it is not repeated here. In an exemplary example, adhesive 12A is provided on the adhesive side 12, adhesive 13A is provided on the adhesive side 13, and adhesive 14A is provided on the adhesive side 14 for demonstration and explanation purposes, and is not intended to limit the present invention. The display panel 200 can be fixed on the backlight module 100 via at least one adhesive provided on at least one adhesive side, such as adhesive 12A, adhesive 13A, and adhesive 14A. The limit cover side 11 may not be provided with adhesive, but the limit cover 150 is used to replace the function of adhesive to carry the display panel 200, thereby achieving the purpose of reducing the amount of adhesive used, which can reduce costs, reduce the attachment area of the frame, and maintain the technical effect of the narrow frame.

It should be noted that the number of light guide elements, light guide element lugs, membranes, membrane lugs, positioning holes, positioning posts, limit covers or openings described in this embodiment is for illustrative purposes only and is not intended to limit the present invention. In other embodiments, the number of membranes, positioning holes or positioning posts may be changed as required. In some embodiments, the membrane may not use any fixing glue at all, but only use a combination of positioning holes corresponding to positioning posts to form a positioning structure, and its shape may be designed to match each other's shapes.

As can be seen from the above embodiments of the present invention, the present invention is positioned by correspondingly hanging at least one positioning hole provided on the lug of the diaphragm on at least one positioning post on the lug of the light guide element, thereby improving the stability of the relative position of the diaphragm and the light guide element. In addition, during the assembly process, the positioning method in which the positioning hole is correspondingly engaged on the positioning post can reduce the amount of fixing glue used on the diaphragm. Alternatively, the fixing glue can be completely omitted on the diaphragm, and the relative position between the diaphragm and the light guide element can be fixed by only using the positioning hole correspondingly engaged on the positioning post, so as to achieve the purpose of omitting the use of fixing glue on the diaphragm.

On the one hand, a cap-type limiting cover is used to be fixed in the limiting groove of the carrier, thereby reducing the number of limiting covers used in the backlight module to one, and the second accommodation space of the limiting cover is used to accommodate the diaphragm lug and the light guide element lug, thereby fixing the diaphragm and the light guide element together, and reducing the use of double-sided adhesive tape on the diaphragm and/or the light guide element. The second extension of the limiting cover presses the diaphragm and the light guide element together in the Z direction, thereby limiting the shaking of the diaphragm and the light guide element inside the carrier, and also avoiding the risk of scratches and bad noise caused by friction between the diaphragm and the light guide element.

On the other hand, an opening structure is added to the surface of the front frame close to the display panel, so that the first extension of the cap-type limiting cover can pass through the opening, and the cap-type limiting cover replaces the adhesive to carry the display panel. The limiting cover is embedded in the opening and the limiting groove, which can restrain the movement of the light-guiding element, strengthen the fixing strength of the diaphragm, improve the scratch between the lower diffusion sheet in the diaphragm and the light-guiding element, and can simultaneously achieve the purpose of limiting the displacement of the diaphragm and the light-guiding element. The limiting cover side of the backlight module with the limiting cover can be exempted from the need for adhesive, and only the adhesive on the remaining adhesive side is used to fix the display panel, thereby achieving the purpose of reducing the amount of adhesive used. The material of the stopper cover has the property of compression and deformation. With this property, the stopper cover can absorb the expansion force of the film or light guide element from the X direction, Y direction or Z direction at the same time, or prevent foreign objects from entering the backlight module. In this way, it can be applied to the fixing structure of general displays and backlight modules, reduce the loss cost of initial development, shorten the production and testing requirements of design components, speed up the development schedule, and improve the rework loss and working time of components.

The above is only the preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

10: Display device

10A: Display plane

100: Backlight module

110: Carrier

111: First storage space

113: Limiting slot

115: medial wall

116: Outer wall

120: Light-guiding element

121: Light guide element lug

122A: First positioning column

123: Surface

130: Diaphragm

130A: Diaphragm

130B: Diaphragm

130C: Diaphragm

131: Diaphragm lug

132A: First positioning hole

140:Front frame

141: Part 1

142: Part 2

142A: Inner surface

142B: External surface

143: Open mouth

144: Gap

150: Limit cover

151: First extension part

152: Second extension

156: Second storage space

200: Display panel

Claims (11)

A backlight module comprises: a carrier, comprising a bottom and a side portion, the side portion is arranged on the bottom and the bottom and the side portion cooperate with each other to define a first accommodation space, the side portion has an inner side wall, and the inner side wall is formed with a limiting groove; a light guide element is accommodated in the first accommodation space; a film is accommodated in the first accommodation space and arranged on the light guide element; a front frame, comprising a first part, a second part and an opening, the first part is combined with the carrier, the light guide element and at least a part of the film are covered by the second part, and the opening formed in the second part; and at least one limiting cover, embedded in the opening and the limiting groove; wherein the limiting cover includes a first extension portion and a second extension portion, the first extension portion passes through the opening of the front frame, and the second extension portion extends between the front frame and the diaphragm; wherein the light guide element includes a light guide element lug, and at least one positioning column, which is arranged on the light guide element lug, and the diaphragm includes a diaphragm lug, and at least one positioning hole, which is arranged on the diaphragm lug, and the diaphragm is positioned on the at least one positioning column of the light guide element through the at least one positioning hole. As described in claim 1, the limiting cover includes a second accommodating space, so that the second accommodating space accommodates the light guide element lug. As described in claim 2, the second accommodation space of the limiting cover accommodates the at least one positioning column of the light guide element. As described in claim 1, the limiting cover includes a second accommodation space, so that the second accommodation space accommodates the diaphragm lug. As described in claim 4, the second accommodation space of the limiting cover accommodates the at least one positioning hole of the membrane. As described in claim 1, the backlight module, wherein the limiting cover is embedded between the inner wall and the light guide element. As described in claim 1, the second extension portion is arranged along the film in a direction of the light guide element to press the film. A display device, comprising: a backlight module as described in any one of claim 1 to claim 7; and a display panel disposed above the backlight module. A display device as described in claim 8, wherein the front frame carries the display panel. The display device as described in claim 8 further comprises: a limiting cover side; and at least one adhesive side, so that the display panel is fixed on the backlight module via at least one adhesive disposed on the at least one adhesive side. A display device as described in claim 10, wherein the limiting cover disposed on the side of the limiting cover passes through the opening and directly contacts the display panel to support the display panel.

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