TWI497172B - Display device and backlight module thereof - Google Patents

Description

Display device and backlight module thereof

The present invention relates to a display device and a backlight module thereof, and more particularly to a display device and a backlight module thereof that can effectively prevent damage of a display panel due to an external force.

With the development of the electronics industry, liquid crystal display devices have become the mainstream in the market. However, since the display panel of the liquid crystal display device cannot emit light by itself, a backlight module as a light source must be provided under the display panel, thereby enabling the liquid crystal display device to achieve display efficiency.

The backlight module of the liquid crystal display device includes a back frame, a light source, a light guide plate, an optical film, and a reflection sheet. The back frame is used for accommodating the light source, the light guide plate, the optical film and the reflection sheet, and the back frame also has the function of clamping the light guide plate, thereby fixing the light guide plate. The light source is disposed on one side of the light guide plate for emitting light to the light guide plate for mixing. The liquid crystal display device further includes a driving circuit board disposed at a bottom of the backlight module, specifically, a bottom portion of the back frame, and the driving circuit board is electrically connected to the display panel for driving the display panel.

However, in order to reduce the overall thickness of the liquid crystal display device, it is usually bent from a part of the bottom surface and a part of the side surface of the back frame for carrying the driving circuit board. The carrying platform enables the driving circuit board to be disposed on the side of the backlight module, thereby effectively reducing the thickness of the overall liquid crystal display device. However, since the carrying platform is bent from a part of the bottom surface and a part of the side surface of the back frame, a notch is formed on the side surface of the back frame, in other words, the carrying platform bent by the bottom surface and the partial side surface of the back frame causes an overall The discontinuity of the back frame structure. When the liquid crystal display device is subjected to an external force, the notch formed on the back frame is easily deformed, and the entire back frame structure is broken to reliably support the display panel. In such a case, the display panel is easily deformed or damaged. The probability is greatly increased. Therefore, how to solve and improve the above problems is one of the focuses of the technical field.

One of the objects of the present invention is to provide a backlight module whose structural design is such that the back frame is not easily deformed by external force, and the display panel is effectively prevented from being damaged by the deformation of the back frame.

Still another object of the present invention is to provide a display device which is structurally designed such that the back frame is not easily deformed by an external force, and the display panel is effectively prevented from being damaged by the deformation of the back frame.

To achieve the above advantages, the backlight module provided by the present invention includes a light guide plate, a light source, and a back frame. The light source is disposed on one side of the light guide plate. The back frame includes a bottom portion, a top portion, a side wall, and at least one first extension structure. The bottom has opposite top and bottom surfaces. The top surface is used to carry the light guide plate and the light source. The top is placed relative to the bottom and the light guide and light source are located between the top and bottom. The side wall is adjacent to the light source and has opposite first and second end faces, the first end face is connected to the bottom end, and the second end face is connected to the top end. The first extension structure extends from a portion of the first end surface of the sidewall toward a direction away from the light guide plate and the light source. First extension structure package The third end surface and the fourth end surface are opposite to each other. The third end surface and the fourth end surface respectively face the same direction as the bottom surface and the top surface, and the distance between the third end surface and the top portion is greater than the distance between the bottom surface and the top portion.

In an embodiment of the invention, the first extension structure further includes a bearing portion and a connecting portion. The load bearing portion includes a fourth end surface opposite to the third end surface. The fourth end faces the top surface of the bottom face in the same direction. The connecting portion includes a third end surface, and the connecting portion is configured to connect a portion of the first end surface of the side wall and the carrying portion.

In an embodiment of the present invention, the backlight module further includes a housing having an accommodating space for accommodating the light guide plate, the light source, and the back frame, wherein the third end surface of the connecting portion contacts the housing .

In an embodiment of the invention, the backlight module further includes a support member disposed between the housing and the top of the back frame.

In an embodiment of the invention, the top of the back frame has opposite first and second surfaces, the first surface and the fourth end surface of the bearing portion face in the same direction, and the second surface faces the bottom of the back frame, and supports The piece is disposed on the first surface and is in contact with the housing.

In an embodiment of the invention, the support member comprises a plastic frame or a tough block.

In an embodiment of the invention, the top of the back frame includes a protruding portion that protrudes away from the bottom direction, and the protruding portion has a supporting surface that contacts the housing.

In an embodiment of the invention, the back frame further includes at least one second extending structure extending from a portion of the second end surface of the sidewall toward the bottom portion, and the second extending structure contacts the housing.

In an embodiment of the present invention, the top of the back frame has a first hollow region adjacent to the second extended structure, and the second extended structure is from the first A hollowed out area is folded outwards.

In an embodiment of the invention, the bottom of the back frame has a second hollow region adjacent to the first extension structure, and the first extension structure is folded outward from the second hollow region.

In an embodiment of the invention, a light source accommodating space is formed between the top, the bottom and the inner side of the side wall for accommodating the light source.

In order to achieve the above advantages, another aspect of the present invention provides a display device including a display panel, a circuit board, and a backlight module. The circuit board is electrically connected to the display panel. The backlight module is disposed relative to the display panel. The backlight module includes a light guide plate, a light source, and a back frame. The light source is disposed on one side of the light guide plate. The back frame includes a bottom portion, a top portion, a side wall, and at least one first extension structure. The bottom has opposite top and bottom surfaces. The top surface is used to carry the light guide plate and the light source. The top is placed relative to the bottom and the light guide and light source are located between the top and bottom. The side wall is adjacent to the light source and has opposite first and second end faces, the first end face is connected to the bottom end, and the second end face is connected to the top end. The first extending structure extends from a portion of the first end surface of the sidewall away from the light guide plate and the light source, and the first extending structure includes a third end surface and a fourth end surface, wherein the third end surface and the fourth end surface respectively The bottom surface faces the same direction as the top surface, and the fourth end surface is used to carry the circuit board, and the distance between the third end surface and the top portion is greater than the distance between the bottom surface and the top surface.

In the display device of the embodiment of the invention, the back frame of the backlight module has a bottom, a top, a side wall and at least one first extending structure. The first extending structure extends from a portion of the first end surface of the sidewall away from the light guide plate and the light source. The first extending structure includes a third end surface and a fourth end surface, and the third end surface is spaced apart from the top surface by a larger surface than the bottom surface. The spacing from the top. Under such a structural design, the third end surface of the first extension structure is brought into contact with the shell In this way, the external force of the back frame can be effectively dispersed, and the back frame is not easily deformed, thereby providing a stable support of the display panel and preventing damage of the display panel. In addition, on the basis of the above structural design, it is also possible to match the support member, the protrusion or the second extension structure to further strengthen the structural strength of the display device according to the embodiment of the present invention.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

1, 1a, 1b, 1c, 1d‧‧‧ display devices

10‧‧‧ display panel

11‧‧‧ boards

12, 12a, 12b, 12c, 12d‧‧‧ backlight module

13‧‧‧Soft circuit board

120‧‧‧Light guide

121‧‧‧Light source

122‧‧‧ Back frame

1200‧‧‧Into the glossy surface

1220‧‧‧ bottom

1221, 1221c‧‧‧ top

1222‧‧‧ side wall

1223‧‧‧First extension structure

1224‧‧‧Loading Department

1225‧‧‧Connecting Department

1226‧‧‧Shell

1227, 1227b‧‧‧support

1228‧‧‧protrusion

1229‧‧‧Second extension structure

D1, D2‧‧‧ distance

E1‧‧‧ first end face

E2‧‧‧ second end face

E3‧‧‧ third end face

E4‧‧‧fourth end face

R1, R2‧‧‧ accommodation space

S1‧‧‧ top surface

S2‧‧‧ bottom

S3‧‧‧ first surface

S4‧‧‧ second surface

S5‧‧‧ support surface

T1, T2‧‧‧ hollow area

X, Y‧‧ direction

1 is a cross-sectional view of a display device according to an embodiment of the invention.

2 is a cross-sectional view showing a display device according to another embodiment of the present invention.

3 is a cross-sectional view showing a display device according to another embodiment of the present invention.

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

FIG. 5 is a cross-sectional view showing a display device according to another embodiment of the present invention.

Please refer to FIG. 1 , which is a cross-sectional view of a display device according to an embodiment of the invention. As shown in FIG. 1 , the display device 1 of the present embodiment includes a display panel 10 , a circuit board 11 , and a backlight module 12 . Circuit board 11 electrical The circuit board 11 is electrically connected to the display panel 10 by a flexible circuit board 13 , but the invention is not limited thereto.

The backlight module 12 of the present embodiment is disposed relative to the display panel 10. The backlight module 12 is, for example, an edge-lit backlight module or a direct-lit backlight module, but the invention is not limited thereto. The backlight module 12 of the embodiment includes a light guide plate 120, a light source 121, and a back frame 122. The light source 121 is disposed on one side of the light guide plate 120 . Specifically, the light source 121 is disposed beside the light incident surface 1200 of the light guide plate 120 . The back frame 122 includes a bottom portion 1220, a top portion 1221, side walls 1222, and at least one first extension structure 1223. The bottom portion 1220 has an opposite top surface S1 and a bottom surface S2 for carrying the light guide plate 120 and the light source 121. The top portion 1221 is disposed relative to the bottom portion 1220, and the light guide plate 120 and the light source 121 are located between the top portion 1221 and the bottom portion 1220. The side wall 1222 is adjacent to the light source 121 and has opposite first end faces E1 and second end faces E2, and the first end face E1 is connected to the bottom portion 1220, and the second end face E2 is connected to the top portion 1221. The first extension structure 1223 extends from the first end surface E1 of the portion of the sidewall 1222 toward the direction X. Specifically, the first extension structure 1223 extends away from the light guide plate 120 and the light source 121. The first extension structure 1223 includes opposite third end faces E3 and fourth end faces E4. The third end surface E3 and the fourth end surface E4 face the same direction as the bottom surface S2 of the bottom portion 1220 and the top surface S1, wherein the fourth end surface E4 of the first extension structure 1223 is used to carry the circuit board 11, and the third end surface E3 and the top surface 1221. The distance D1 between is greater than the distance D2 between the bottom surface S2 of the bottom portion 1220 and the top portion 1221.

It should be noted that the backlight module described in this embodiment further includes components such as an optical film and a reflection sheet. However, since these members are not the main technical features in the present invention, these members are not shown in the drawings of the present invention.

As shown in FIG. 1 , the first extension structure 1223 described in this embodiment further includes a bearing portion 1224 and a connecting portion 1225 . The carrying portion 1224 includes a fourth end surface E4, that is, the carrying portion 1224 carries the circuit board 11 with the fourth end surface E4 as a bearing surface. The connecting portion 1225 includes a third end surface E3 for connecting a portion of the first end surface E1 of the side wall 1222 and the carrying portion 1224. In the present embodiment, the connecting portion 1225 and the side wall 1222 are formed in a U shape, for example, and the supporting portion 1224 and the connecting portion 1225 are formed into an L shape, for example, but the invention is not limited thereto, and the connecting portion 1225, the side wall 1222, and The shape of the bearing portion 1224 can be changed according to actual needs.

As shown in FIG. 1, the top portion 1221 of the present embodiment has opposite first and second surfaces S3 and S4. The first surface S3 of the top portion 1221 faces the same direction as the fourth end surface E4 of the carrier portion 1224, and the second surface S4 of the top portion 1221 faces the bottom portion 1220 of the back frame 122. Specifically, an accommodating space R1 for accommodating the circuit board 11 is disposed between the first surface S3 of the top portion 1221 and the fourth end surface E4 of the carrying portion 1224. In addition, a light source accommodating space R2 for accommodating the light source 121 is formed between the top portion 1221 of the back frame 122 and the bottom portion 1220 and the inner side of the side wall 1222.

As shown in FIG. 1, the bottom portion 1220 of this embodiment has a hollowed out area T1. This hollow region T1 is adjacent to the first extension structure 1223. The first extension structure 1223 described in this embodiment is folded outward from the hollow region T1. Specifically, the bearing portion 1224 and the connecting portion 1225 of the first extending structure 1223 are originally part of the bottom portion 1220 of the back frame 122, and the area of the bottom portion 1220 of the back frame 122 needs to be intercepted according to actual production requirements. The extension structure 1223, that is, the area of the hollow structure T1 described in this embodiment is substantially equal to the area of the first extension structure 1223.

As shown in FIG. 1 , the backlight module described in this embodiment further includes a shell. Body 1226. The housing 1226 has an accommodating space for accommodating the light guide plate 120, the light source 121, the back frame 122, and the display panel 10. In the present embodiment, the third end surface E3 of the first extension structure 1223 is, for example, directly in contact with the housing 1226. When an external force is applied to the display panel 10 of the display device 1 or the housing 1226 located at the periphery of the display panel 10, since the third end surface E3 of the first extension structure 1223 directly contacts the housing 1226, an external force may pass through the display panel 10 The path of the top portion 1221, the side wall 1222, the third end surface E3, and the housing 1226 is released, that is, in the case where the third end surface E3 of the first extension structure 1223 is in direct contact with the housing 1226, the housing 1226 is effective. The external force received by the back frame 122 and the display panel 10 is reduced, so that the external force received by the back frame 122 is reduced and deformation is not easily generated, and the display panel 10 is effectively prevented from being damaged by the deformation of the back frame 122.

It should be particularly noted that the third end surface E3 of the first extension structure 1223 directly contacting the housing 1226 is only one of the embodiments of the present invention. In other embodiments, the third end surface E3 of the first extension structure 1223 may also have a gap between the housing and the housing 1226. In addition, a cushion may be placed in the gap.

Please refer to FIG. 2 , which is a cross-sectional view of a display device according to another embodiment of the present invention. The display device 1a of the present embodiment is similar to the display device 1 shown in FIG. 1 , except that the backlight module 12 a of the embodiment further includes a support member 1227 . The support member 1227 is disposed between the housing 1226 and the back frame 122. Specifically, the support member 1227 is disposed on the first surface S3 of the top portion 1221 of the back frame 122 and simultaneously contacts the housing 1226. When an external force is applied to the display panel 10 of the display device 1a or the housing 1226 located at the periphery of the display panel 10, since the third end surface E3 of the first extension structure 1223 and the support member 1227 are respectively in contact with the housing 1226, external force is applied. Via support 1227, the top portion 1221, the side wall 1222, the third end surface E3 of the connecting portion 1225, and the path of the housing 1226 are released, that is, the third end surface E3 of the first extending structure 1223 and the support member 1227 are respectively in contact with the housing. In the case of 1226, the external force applied to the display panel 10 of the display device 1a or the casing 1226 located around the display panel 10 is effectively dispersed.

As shown in FIG. 2, the support member 1227 described in this embodiment is, for example, a tough block, but the invention is not limited thereto. In other embodiments, the display device 1b shown in FIG. 3, the support member 1227b included in the backlight module 12b is, for example, a plastic frame.

Please refer to FIG. 4 , which is a cross-sectional view of a display device according to another embodiment of the present invention. The display device 1c of the present embodiment is similar to the display device 1 shown in FIG. 1 , except that the top portion 1221 a of the back frame 122 of the present embodiment includes a protrusion 1228 protruding in the Y direction, specifically That is, the projection 1228 protrudes away from the bottom portion 1220. As shown in FIG. 4, the projection 1228 has a support surface S5 that contacts the housing 1226. Specifically, since the metal back frame 122 has good ductility, the protrusions 1228 described in this embodiment are formed by bending the top portion 1221a of the back frame 122. The effect of the protrusion 1228 described in this embodiment is similar to that of the support member 1227 shown in FIG. 2, that is, the third end face E3 of the first extension structure 1223 and the protrusion 1228 of the top portion 1221c are respectively in contact with each other. In the case of the casing 1226, the external force applied to the display panel 10 of the display device 1c or the casing 1226 located at the periphery of the display panel 10 is effectively dispersed.

Please refer to FIG. 5 , which is a cross-sectional view of a display device according to another embodiment of the present invention. The display device 1d of the present embodiment is similar to the display device 1 shown in FIG. 1 , except that the back frame 122 c of the embodiment further includes at least one second extension structure 1229 . This second extension structure 1229 is from the side A portion of the second end surface E4 of the wall extends toward the direction Y. Specifically, the second extension structure 1229 extends away from the bottom portion 1220. As shown in FIG. 5, the second extension structure 1229 of the present embodiment directly contacts the housing 1226, and the achievable effect is similar to the support member 1227 shown in FIG. 2, that is, the first extension structure 1223. When the third end surface E3 and the second extension structure 1229 are respectively in contact with the casing 1226, the external force applied to the display panel 10 of the display device 1d or the casing 1226 located at the periphery of the display panel 10 is effectively dispersed. In addition, the back frame 122c of the embodiment has a hollow area T2, the hollow area T2 is adjacent to the second extension structure 1229, and the second extension structure 1229 is folded outward from the hollow area T2, and the hollow area T2 is The area is approximately equal to the area of the second extension structure 1229. The structural relationship between the second extension structure 1229 and the hollow region T2 is similar to the structural relationship between the first extension structure 1223 and the hollow region T1 shown in FIG. 1 , and details are not described herein.

In summary, in the display device of the embodiment of the present invention, the back frame of the backlight module has a bottom, a top, a sidewall, and at least one first extending structure. The first extending structure extends from a portion of the first end surface of the sidewall away from the light guide plate and the light source. The first extending structure includes a third end surface and a fourth end surface, and the third end surface is spaced apart from the top surface by a larger surface than the bottom surface. The spacing from the top. Under such a structural design, the third end surface of the first extending structure is brought into contact with the casing, so that the external force received by the back frame can be effectively dispersed, and the back frame is not easily deformed, thereby providing stable support of the display panel. To prevent damage to the display panel. In addition, on the basis of the above structural design, it is also possible to match the support member, the protrusion or the second extension structure to further strengthen the structural strength of the display device according to the embodiment of the present invention.

1‧‧‧ display device

10‧‧‧ display panel

11‧‧‧ boards

12‧‧‧Backlight module

13‧‧‧Soft circuit board

120‧‧‧Light guide

121‧‧‧Light source

122‧‧‧ Back frame

1200‧‧‧Into the glossy surface

1220‧‧‧ bottom

1221‧‧‧ top

1222‧‧‧ side wall

1223‧‧‧First extension structure

1224‧‧‧Loading Department

1225‧‧‧Connecting Department

1226‧‧‧Shell

D1, D2‧‧‧ distance

E1‧‧‧ first end face

E2‧‧‧ second end face

E3‧‧‧ third end face

E4‧‧‧fourth end face

R1, R2‧‧‧ accommodation space

S1‧‧‧ top surface

S2‧‧‧ bottom

S3‧‧‧ first surface

S4‧‧‧ second surface

T1‧‧‧ hollow area

X‧‧‧ direction

Claims (9)

A backlight module includes: a light guide plate; a light source disposed on one side of the light guide plate; and a back frame, comprising: a bottom portion having a top surface and a bottom surface opposite to the bottom surface a light guide plate and the light source; a top portion disposed opposite to the bottom portion, wherein the light guide plate and the light source are located between the top portion and the bottom portion; a side wall adjacent to the light source and having a first one end surface and a second portion An end surface is connected to the bottom portion, and the second end surface is connected to the top portion; at least one first extending structure, the first end surface of the sidewall extends away from the light guide plate and the light source The first extending structure includes a third end surface facing the same direction of the bottom surface, and a distance between the third end surface and the top portion is greater than a distance between the bottom surface and the top portion; and a housing having a capacity The accommodating space is for accommodating the light guide plate, the light source and the back frame, wherein the third end surface is in contact with the housing. The backlight module of claim 1, wherein the first extending structure further comprises: a carrying portion, comprising a fourth end surface opposite to the third end surface, the fourth end surface and the bottom end portion The top surface faces the same direction; and a connecting portion includes the third end surface, the connecting portion is configured to connect the first end surface of the sidewall to the carrying portion. The backlight module of claim 1, further comprising a support member disposed between the housing and the top of the back frame. The backlight module of claim 3, wherein the top portion of the back frame has a first surface and a second surface, the first surface and the fourth end surface of the bearing portion face in the same direction The second surface faces the bottom of the back frame, and the support member is disposed on the first surface and contacts the housing. The backlight module of claim 1, wherein the top portion of the back frame includes a protrusion protruding away from the bottom portion, the protrusion having a support surface contacting the housing. The backlight module of claim 1, wherein the back frame further comprises at least one second extending structure, and the second end surface extends from a portion of the side wall away from the bottom portion, and the first The second extension structure contacts the housing. The backlight module of claim 6, wherein the top portion of the back frame has a first hollow region adjacent to the second extension structure, the second extension structure is outward from the first hollow region Fold it out. The backlight module of claim 1, wherein the bottom portion of the back frame has a second hollow region adjacent to the first extension structure, the first extension structure is outward from the second hollow region Fold it out. A display device comprising: a display panel; a circuit board electrically connected to the display panel; and a backlight module disposed relative to the display panel, the backlight module includes: a light guide plate; and a light source disposed on one side of the light guide plate And a back frame, comprising: a bottom portion having a top surface and a bottom surface, the top surface for carrying the light guide plate and the light source; a top portion disposed opposite to the bottom portion, and the light guide plate and the light source Located between the top portion and the bottom portion; a side wall adjacent to the light source and having a first end surface and a second end surface, the first end surface being coupled to the bottom portion, the second end surface being coupled to the top portion; and at least a first extending structure, the first end surface extending away from the light guide plate and the light source from a portion of the sidewall, the first extending structure includes a third end surface and a fourth end surface, wherein the first extending structure The third end surface and the fourth end surface respectively face the same direction as the bottom surface, the fourth end surface is used to carry the circuit board, and the distance between the third end surface and the top surface is greater than the bottom surface and the top surface Pitch; and a housing having an accommodating space, the accommodating space for accommodating the light guide plate of the light source and the back frame, wherein the third end surface in contact with the housing.