CN100462813C - Backlight module and liquid crystal display device thereof - Google Patents

Abstract

A backlight module and a liquid crystal display device thereof comprise a frame and a back plate. The frame defines an XYZ coordinate and comprises two first strip-shaped frame bodies extending along the Y-axis direction and a second strip-shaped frame body extending along the X-axis direction, wherein the second strip-shaped frame body is connected to one end of the two first strip-shaped frame bodies, the two first strip-shaped frame bodies comprise an upper part and a lower part, and the upper part comprises a first fixing piece extending along the Z-axis direction. The back plate accommodates the frame and comprises four sides and a bottom plate, wherein the sides comprise second fixing pieces extending along the X-axis direction and used for being clamped with the first fixing pieces. In the backlight module, the frame and the back plate are clamped on the first fixing piece through the second fixing piece, so that two first strip-shaped frame bodies of the frame can keep straight mutually, and the two first strip-shaped frame bodies are prevented from being recessed inwards.

Description

Backlight module and liquid crystal display device thereof

【Technical field】

The invention relates to a backlight module and a liquid crystal display device thereof.

【Background technique】

Referring to FIG. 1 , the liquid crystal display device 10 mainly includes a front frame 300 , a liquid crystal panel 200 and a backlight module 100 . The liquid crystal panel 200 has a liquid crystal layer disposed between a pair of upper and lower substrates for displaying images. The backlight module is used to illuminate the liquid crystal panel 200 and includes a back plate 119 combined with the front frame 300 to combine the liquid crystal panel 200 and the backlight module 100 into the liquid crystal display device 10 .

Referring to FIG. 2 , the backlight module 100 further includes a ㄇ-shaped frame 105 , an optical film set, a reflector 117 and a plurality of light source units 101 . The ㄇ-shaped frame 105 includes two first strip frame bodies 131 and a second strip frame body 133, wherein the second strip frame body 133 is connected to one end of the two first strip frame bodies 131 . The optical film group, such as the diffusion sheets 111 , 113 and the diffusion plate 115 are arranged in the ㄇ-shaped frame 105 for uniformly directing the light emitted from the light source unit 101 to the liquid crystal panel 200 . The reflecting plate 117 is disposed between the optical film set and the bottom plate 135 of the back plate 119 for reflecting the light emitted from the light source unit 101 to the optical film set. The light source unit 101 is fixed on the light source unit fixing member 109 and disposed between the optical film set and the reflective plate 117 . The back plate 119 can accommodate the ㄇ-shaped frame 105 , the optical film set, the reflection plate 117 and the light source unit 101 . The backlight module 100 further includes a strip 103 assembled to the other ends of the two first strip frames 131 for fixing the optical film set.

However, referring to FIG. 3, when the ㄇ-shaped frame 105 is placed in the backboard, it is often limited by the material properties, and the material will have a springback phenomenon during processing, that is, the two ㄇ-shaped frames 105 The first strip-shaped frames 131 cannot keep straight with each other, so that the two first strip-shaped frames 131 are concave toward the X-axis direction, as shown by the dotted line in FIG. There are bright and dark lines.

Therefore, there is a need to provide a backlight module capable of solving the aforementioned problems.

【Content of invention】

The object of the present invention is to provide a backlight module, the structure of the frame and the backplane is engaged with the first fixing member by the second fixing member, so that the two first strip-shaped frames of the frame can be kept straight to each other. The phenomenon of indentation of the two first strip-shaped frames will not occur.

To achieve the above purpose, the present invention provides a backlight module, which includes a frame and a backplane. The frame defines an XYZ coordinate, and includes two first strip-shaped frames extending along the Y-axis direction and a second strip-shaped frame extending along the X-axis direction, wherein the second strip-shaped frame is connected to the One end of the two first bar-shaped frames, and the two first bar-shaped frames include an upper part and a lower part, and the upper part includes a first fixing part extending along the Z-axis direction. The back board accommodates the frame and includes four sides and a bottom board, wherein the side includes a second fixing part extending along the X-axis direction for engaging with the first fixing part.

The present invention also provides a liquid crystal display device, characterized in that: comprising:

a front frame;

a liquid crystal panel; and

A backlight module, including:

A ㄇ-shaped frame defines an XYZ coordinate, and includes two first strip-shaped frames extending along the Y-axis direction and a second strip-shaped frame extending along the X-axis direction, wherein the second strip-shaped frame It is connected to one end of the two first strip-shaped frames, and the two first strip-shaped frames include an upper part and a lower part, and the upper part includes a first fixing part extending along the Z-axis direction; and

a back plate, which accommodates the ㄇ-shaped frame, and includes four sides and a bottom plate, wherein the side includes a second fixing part extending along the X-axis direction, and the second fixing part is engaged with the first fixing part , and the back plate is combined with the front frame to combine the liquid crystal panel and the backlight module into the liquid crystal display device.

The advantage of the present invention is that, the structure of the frame and the backboard is engaged with the first fixing member by the second fixing member, so that the upper parts of the two first strip frame bodies of the frame can be kept straight without The upper part of the two first strip-shaped frame bodies will be concaved inward.

In order to make the above and other objects, features, and advantages of the present invention more apparent, a detailed description will be given below in conjunction with the attached figures.

【Description of drawings】

FIG. 1 is an exploded perspective view of a liquid crystal display device in the background art.

FIG. 2 is a three-dimensional exploded schematic view of a backlight module of the background art.

FIG. 3 is a three-dimensional schematic diagram of a ㄇ-shaped frame in the background technology, which shows that the two first strip-shaped frames of the ㄇ-shaped frame are indented.

FIG. 4 is an exploded perspective view of a backlight module according to an embodiment of the present invention.

FIG. 5 is a partially exploded perspective view of the frame and the backboard of the present invention.

FIG. 6 is a partial three-dimensional combined schematic view of the frame and the backboard of the present invention.

【Detailed ways】

Referring to FIG. 4, it shows a backlight module 400 according to an embodiment of the present invention, which can be used in a liquid crystal display device, such as a liquid crystal display device similar to the first figure, which includes a front frame, a liquid crystal panel and a backlight module 400 . The backlight module 400 is used to illuminate the liquid crystal panel, and includes a back plate 419 combined with the front frame to combine the liquid crystal panel and the backlight module 400 into the liquid crystal display device.

In this embodiment, the backlight module 400 is a direct-lit backlight module, but the present invention can also be applied to a side-lit backlight module, depending on the configuration of the light source or the light source unit. The backlight module 400 further includes a ㄇ-shaped frame 405 , an optical film set, a reflector 417 and a light source unit 401 . Preferably, the ㄇ-shaped frame 405 is made of plastic, and the ㄇ-shaped frame 405 defines an XYZ coordinate, and includes two first strip frames 431 extending along the Y-axis direction and a first strip frame 431 extending along the X-axis. The second strip-shaped frame body 433 extending in the direction, wherein the second strip-shaped frame body 433 is connected to one end of the two first strip-shaped frame bodies 431 . The optical film group, such as the diffusion sheets 411, 413 and the diffusion plate 415, is disposed in the ㄇ-shaped frame 405 to uniformly direct the light emitted from the light source unit 401 to the liquid crystal panel. The reflecting plate 417 is disposed between the optical film set and the bottom plate 435 of the back plate 419 for reflecting the light emitted from the light source unit 401 to the optical film set. The light source unit 401 , such as a lamp tube or a light emitting diode, is fixed on the light source unit fixing member 409 and disposed between the optical film set and the reflector 417 . The back plate 419 can be made of metal, such as aluminum, magnesium and their corresponding alloys, etc., to accommodate the ㄇ-shaped frame 405, the optical film group, the reflector 417 and the light source unit 401, and includes Four sides 437 and the bottom plate 435 .

In this embodiment, the backlight module 400 further includes a strip 403 assembled to the other ends of the two first strip frames 431 for fixing the optical film set. Usually, there are grooves (not shown in the figure) in the two first strip frame bodies 431, so that the optical film group can be slid in along the Y-axis direction, and the strip bead 403 can be fixed by installing the Optical film set.

Referring to FIG. 5 , the two first strip frames 431 include an upper portion 441 and a lower portion 443 , the upper portion 441 includes at least one first fixing member 406 , and the first fixing member 406 extends along the Z-axis direction. The side 437 of the back plate 419 includes at least one second fixing part 418 , and the second fixing part 418 extends along the X-axis direction.

Referring to FIG. 6, the second fixing member 418 is engaged with the first fixing member 406, so as to keep the upper parts 441 of the two first strip frame bodies 431 of the ㄇ-shaped frame 405 straight with each other without The upper part 441 of the two first strip-shaped frame bodies 431 is concaved. In this embodiment, the first fixing part 406 is a protrusion extending along the Z-axis direction, and the second fixing part 418 is a recess extending along the X-axis direction. The second fixing member 418 can be formed with recesses and openings 420 through a stamping process. Those skilled in the art of the present invention will know that, in an alternative embodiment, the second fixing member 418 may be a protrusion (not shown) extending along the Z-axis direction, and the first fixing member 406 It is a recess (not shown) that may extend along the X-axis direction.

Referring to FIG. 5 again, the lower portions 443 of the two first strip frames 431 include a third fixing member 445 , and the bottom plate 435 of the back plate 419 includes a fourth fixing member 447 . The fourth fixing part 447 is used to engage with the third fixing part 445, so that the ㄇ-shaped frame 405 is fixed on the bottom plate 435 of the back plate 419, and the two ㄇ-shaped frame 405 The lower parts 443 of the first strip-shaped frame bodies 431 are kept straight to each other, and the lower parts 443 of the two first strip-shaped frame bodies 431 are not concaved. The third fixing part 445 can be a protrusion, and the fourth fixing part 447 can be an opening.

The structure of the frame and the backboard of the present invention can keep the upper parts of the two first bar-shaped frame bodies of the frame straight with each other without causing the second fixing member to engage with the first fixing member Indentation occurs at the upper parts of the two first strip-shaped frames. Moreover, the structure of the frame and the backboard of the present invention can be fixed on the bottom plate of the backboard by the fourth fixing piece being engaged with the third fixing piece, and the two second fixing pieces of the frame The lower parts of the strip-shaped frame bodies are kept straight to each other, so that the lower parts of the two first strip-shaped frame bodies will not be concaved.

Although the present invention has been disclosed by the foregoing embodiments, they are not intended to limit the present invention, and any changes and modifications based on the present invention should still fall within the protection scope of the present invention.

[Description of main component symbols]

10 Liquid crystal display device 100 Backlight module

101 Light source unit 103 Strip bead

105 ㄇ Font frame 109 Light source unit fixing piece

111 Diffuser 113 Diffuser

115 Diffusion plate 117 Reflecting plate

119 Backplane

131 The first strip frame 133 The second strip frame

135 base plate 200 LCD panel

300 Front frame 400 Backlight module

401 Light source unit 403 Strip bead

405 ㄇ-shaped frame 406 The first fixing piece

409 light source unit fixing piece

411 Diffuser 413 Diffuser

415 diffuser plate 417 reflective plate

418 Second Fixing Part 419 Back Plate

420 opening 431 first strip frame

433 The second frame

435 bottom plate 437 side

441 upper part 443 lower part

445 The third fixing piece 447 The fourth fixing piece

Claims (10)

1. backlight module is characterized in that: comprise:

One framework, define an XYZ coordinate, and comprise two the first strip framework and second strip frameworks of extending of extending along Y direction along X-direction, this second strip framework is connected in an end of these two first strip frameworks, and each of these two first strip frameworks all comprises a top and a bottom, and this top comprises first fixture that extends along Z-direction;

One backboard holds this framework, and comprises a four side and a base plate, and wherein this side corresponding to this first strip framework comprises second fixture that extends along X-direction, and this second fixture is sticked in this first fixture.

2. according to the described backlight module of claim 1, it is characterized in that: this first fixture is the projection of extending along Z-direction, and this second fixture is the recess that extends along X-direction.

3. backlight module is characterized in that: comprise:

One framework, define an XYZ coordinate, and comprise two the first strip framework and second strip frameworks of extending of extending along Y direction along X-direction, this second strip framework is connected in an end of these two first strip frameworks, and each of these two first strip frameworks all comprises a top and a bottom, and this top comprises first fixture that extends along X-direction;

One backboard holds this framework, and comprises a four side and a base plate, and the side of two first strip framework correspondences of its neutralization all comprises second fixture that extends along Z-direction, and this second fixture is sticked in this first fixture,

This second fixture is the projection of extending along Z-direction, and this first fixture is the recess that extends along X-direction.

4. according to claim 1 or 3 described backlight modules, it is characterized in that: the bottom of these two first strip frameworks comprises one the 3rd fixture jointly, and the base plate of this backboard comprises one the 4th fixture, and the 4th fixture is sticked in the 3rd fixture.

5. according to the described backlight module of claim 4, it is characterized in that: the 3rd fixture is a projection, and the 4th fixture is an opening.

6. according to the described backlight module of claim 1, it is characterized in that: other comprises:

One strip press strip is connected to the other end of these two first strip frameworks.

7. according to the described backlight module of claim 1, it is characterized in that: other comprises:

One blooming piece is disposed in this framework;

One reflecting plate is disposed between the base plate of this blooming piece and this backboard; And

One light source cell is disposed between this blooming piece and this reflecting plate.

8. according to the described backlight module of claim 1, it is characterized in that: this framework is a ㄇ font framework.

9. according to the described backlight module of claim 1, it is characterized in that: this backlight module is a direct type backlight module.

10. LCD device is characterized in that: comprise:

Frame before one;

One liquid crystal panel; And

One backlight module comprises:

One ㄇ font framework, define an XYZ coordinate, and comprise two the first strip framework and second strip frameworks of extending of extending along Y direction along X-direction, wherein this second strip framework is connected in an end of these two first strip frameworks, and each of these two first strip frameworks all comprises a top and a bottom, and this top comprises first fixture along the Z-direction extension; And

One backboard, hold this ㄇ font framework, and comprise a four side and a base plate, wherein this side corresponding to this first strip framework comprises second fixture along the X-direction extension, this second fixture is sticked in this first fixture, and this backboard is to be bonded to each other with this preceding frame and this liquid crystal panel and this backlight module are combined into this LCD device.

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