CN101324723A - Liquid crystal display device and backlight module and frame structure thereof - Google Patents

Abstract

The invention discloses a liquid crystal display device, which comprises a backlight module, a liquid crystal display panel, a frame, an outer frame and a fixing piece. The liquid crystal display panel is arranged on the backlight module, the frame comprises a plurality of frame bodies, the backlight module is arranged in a space surrounded by the frame, in addition, the outer frame is arranged on the outer side of the frame, the outer frame partially covers the backlight module and the liquid crystal display panel, and the fixing piece is used for fixing the frame bodies.

Description

Liquid crystal display device and its backlight module and frame structure

technical field

The invention relates to a liquid crystal display device, in particular to a frame structure of a liquid crystal display device.

Background technique

With the advancement of thin film transistor manufacturing technology, liquid crystal displays are widely used in various electronic products such as mobile phones, digital cameras, notebook computers, and desktop computers. Since the liquid crystal display panel itself does not have the function of emitting light, a backlight module (backlight module) must be provided under the liquid crystal display panel to provide a light source to achieve the display function, and the light generated by these backlight sources penetrates the diffusion film, Optical film layers such as polarizers are used to form a uniform plane of light incident on the liquid crystal display panel for displaying images.

Please refer to FIG. 1 , which is a schematic cross-sectional view of a conventional liquid crystal display device. The conventional liquid crystal display device 100 includes a liquid crystal display panel 110 , a backlight module and a frame structure. The backlight module is composed of an optical film 130 and a backlight 120 , and the frame structure includes a bezel 150 , a backplane 151 and a plastic frame 140 fitted inside the bezel and the backplane. The liquid crystal display panel 110 and the backlight module are sequentially arranged in the space surrounded by the plastic frame 140 , the upper frame 150 and the back plate 151 from top to bottom.

Generally speaking, when assembling a liquid crystal display device, the backlight 120 and the optical film 130 are arranged on the plastic frame 140, and then the liquid crystal display panel 110 is arranged on the optical film 130, and finally, the upper frame 150 is sleeved. On the liquid crystal display panel 110 , the upper frame 150 , the back plate 151 and the plastic frame 140 are locked by the locking element 160 to complete the assembly of the liquid crystal display device 100 .

However, in the existing liquid crystal display device 100, when the backlight source 120 of the backlight module is damaged and needs to be replaced, the upper frame 150, the back plate 151 and the plastic frame 140 must be removed before replacement or maintenance can be performed. During the process, the optical film 130 is often scratched and the optical film is damaged, thereby increasing the maintenance cost of the backlight module.

In view of this, how to provide a liquid crystal display device that facilitates the rework of the backlight module and prevents the optical film from being damaged during the rework is one of the important issues.

Contents of the invention

In view of the above, the purpose of the present invention is to provide a backlight module, the frame of which has a plurality of frames, so as to facilitate the rework of the backlight module.

Another object of the present invention is to provide a liquid crystal display device, which uses a frame structure that is easy to disassemble, thereby reducing the maintenance cost of the liquid crystal display device.

To achieve the above or other objectives, the present invention provides a liquid crystal display device, which includes a backlight module, a liquid crystal display panel, a frame, an outer frame and a fixing member. Wherein the liquid crystal display panel is arranged on the backlight module, the frame includes a plurality of frames, and the backlight module is arranged in the space surrounded by the frame, in addition, the outer frame is arranged outside the frame, and partially covers the backlight module and the liquid crystal display panel, and The fixing piece is used for fixing the frame body.

According to the liquid crystal display device described in the preferred embodiment of the present invention, the frame body includes a first frame body and a second frame body, and the first frame body and the second frame body are stacked from the liquid crystal display panel to the backlight module.

According to the liquid crystal display device described in the preferred embodiment of the present invention, the backlight module includes a plurality of optical films and a backlight, the optical films are disposed on the first frame, and the backlight is disposed on the second frame.

According to the liquid crystal display device described in the preferred embodiment of the present invention, the material of the frame body includes an elastic material or plastic, and the fixing member includes a screw or a clamping member.

According to the liquid crystal display device described in the preferred embodiment of the present invention, the fixing member penetrates from the second frame body to the first frame body for locking the first frame body and the second frame body.

According to the liquid crystal display device described in the preferred embodiment of the present invention, wherein the first frame body and the second frame body respectively have a first fastening portion and a second fastening portion, and the first fastening portion and the second fastening portion The joint is arranged on a side close to the outer frame. The two ends of the fixing part are provided with two protrusions, and the fixing part is engaged with the first buckling part and the second buckling part through the protrusions.

According to the liquid crystal display device described in the preferred embodiment of the present invention, it further includes a locking element for locking the outer frame and the frame.

To achieve the above or other purposes, the present invention further provides a backlight module suitable for a liquid crystal display device, including a frame, a backlight source and a fixing member. The frame includes a first frame body and a second frame body, the first frame body and the second frame body are connected to each other, the backlight is arranged on the second frame body, a plurality of optical films are arranged on the first frame body, and It is located above the backlight, and the fixing part is used for fixing the first frame body and the second frame body.

In summary, in the liquid crystal display device of the present invention, since the frame of the backlight module has multiple frames, when the backlight is damaged or dropped and needs to be replaced, only the frame with the backlight needs to be removed, Therefore, maintenance costs can be significantly reduced.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.

Description of drawings

FIG. 1 shows a schematic cross-sectional view of a conventional liquid crystal display device;

FIG. 2 shows a partial cross-sectional view of a liquid crystal display device according to a first preferred embodiment of the present invention; and

FIG. 3 is a partial cross-sectional view of a liquid crystal display device according to a second preferred embodiment of the present invention.

Description of main component symbols

100, 200, 300 Liquid crystal display device 250, 350 Frame

110, 210 Liquid crystal display panel 223, 340 The first frame

130, 221 Optical film 224, 341 Second frame

120, 222 Backlight 223a, 224a Groove

140 Plastic Frame 225 Frame

150 Upper plate 223b, 224b, 250a Locking holes

151 Backplane 260b, 370 Fixing parts

160, 260a, 360 locking elements 340a, 340b buckle parts

220 Backlight Module 370a, 370b Bump

Detailed ways

FIG. 2 is a partial cross-sectional view of a liquid crystal display device according to a first preferred embodiment of the present invention. Referring to FIG. 2 , the liquid crystal display device 200 of this embodiment mainly includes a liquid crystal display panel 210 , a backlight module 220 and a bezel 250 . The liquid crystal display panel 210 and the backlight module 220 are arranged in the space surrounded by the outer frame 250, the outer frame 250 is, for example, a metal outer frame, and the backlight module 220 is arranged under the liquid crystal display panel 210 to provide a liquid crystal display panel 210 Uniform surface light source.

Following the above, the liquid crystal display device 200 of this embodiment includes a frame 225 for accommodating the backlight module 220. The backlight module 220 includes a plurality of optical films 221 and a backlight 222. Generally speaking, the backlight 222 emits a side light source , including light-emitting diodes, flat lamp panels, cold cathode lamps, hot cathode lamps or cold cathode fluorescent lamps, etc. The optical film 221 includes a diffusion film, a brightness enhancement film, a prism film, a wide viewing angle film or a combination of the aforementioned films. The optical film 221 is used to further process the light so that the light source provided by the backlight module 220 can have better display brightness and quality. In addition, the backlight 222 of this embodiment is arranged under the optical film 221, for example. Of course, the location of the above-mentioned backlight 222 is not limited here, and the location of the backlight 222 can be adjusted according to actual needs. adjustment, for example, the backlight 222 can be disposed on both sides of the backlight module 220 . If it is arranged on both sides of the backlight module 220, the backlight 222 can be used with a light guide plate (light guide), and the light guide plate (not shown) is arranged on one side of the backlight 222, so that the light emitted by the backlight 222 can pass through Guided by the light guide plate, it reaches the liquid crystal display panel 210 .

It should be explained in detail here that the frame 225 of this embodiment is composed of a plurality of frames, including the first frame 223 and the second frame 224 , which are stacked from the liquid crystal display panel 210 to the backlight module 220 . The first frame body 223 and the second frame body 224 have grooves 223a, 224a respectively, and a plurality of optical films 221 and backlight sources 222 are arranged in the space surrounded by the first frame body and the second frame body, wherein the optical The diaphragm 221 is fixed on the first frame body 223 through the groove 223a, and the backlight 222 is disposed on the second frame body 224 through the groove 224a. The first frame body 223 and the second frame body 224 of this embodiment are respectively a mold frame, the material of which includes an elastic material or plastic, and the forming method includes integral molding by plastic injection molding. In addition, in the liquid crystal display device 200 of this embodiment, locking holes 223b and 224b are respectively formed on the surfaces of the first frame body 223 and the second frame body 224. The locking holes 224b of the second frame body penetrate up and down. The locking hole 223b of the frame body is aligned with the locking hole 224b of the second frame body, and the first frame body and the second frame body pass through the locking holes 223b and 224b through a fixing piece 260b to fix the first frame body The body 223, the second frame body 224, and the fixing member 260b are, for example but not limited to, screws and pins.

Please continue to refer to FIG. 2 , the liquid crystal display device 200 of this embodiment further includes an outer frame 250 arranged on the outside of the frame 225, and partially covers the liquid crystal display panel 210 and the backlight module 220. In addition, a plurality of The locking hole 250a, the locking hole 250a of the outer frame is aligned with the locking hole 223a of the first frame body, and a locking element 260a is passed through the locking holes 230a, 250a, so that the outer frame 250 It can be locked with the frame 225 to complete the assembly of the display. In this embodiment, the locking element 260a is, for example, but not limited to screws and pins.

It is worth noting that when the backlight source of the backlight module of the present invention is damaged or dropped, since the frame structure 225 of the present invention fixes the first frame body 223 and the second frame body 224 through the fixing member 260b, it can be directly placed The second frame body 224 for fixing the backlight is removed, and the lamp tube or light-emitting element arranged in the second frame body 224 is replaced. Compared with the prior art, the frame structure 225 of the present invention does not need to remove the outer frame 250, the liquid crystal display panel 210, and the optical film 221 to replace or repair the lamp tube or light-emitting element. In other words, the liquid crystal of the present invention The display device 200 only needs to dismantle the backlight module and the frame 224 provided with the backlight to replace the damaged light sheet by itself, which has great advantages in terms of maintenance cost and time.

FIG. 3 is a partial cross-sectional view of a liquid crystal display device 300 according to a second preferred embodiment of the present invention. The liquid crystal display device 300 of the second preferred embodiment is similar to the first preferred embodiment, and the main difference between the two is that the first frame body 340 and the second frame body 341 of this embodiment except the grooves 223a, 224a In addition, it further includes a side close to the outer frame 350 on which the fastening portions 340a, 340b are respectively formed. The shape of the fastening portion 340a, 340b includes but is not limited to a rectangle, a circle or any shape. In addition, in this embodiment, a fixing part 370 is used to fix the first frame body 340 and the second frame body 341 , wherein the fixing part is, for example, a clamping part. The fixing part 370 is provided with two protruding blocks 370a, 370b at both ends and extends towards the interior of the liquid crystal display device 300. The two protruding blocks 370a, 370b are respectively arranged in the buckling parts 340a, 340b, and the fixing part 370 can hold the first frame body 340 and the second frame body 341 are snapped together. The shapes of the protrusions 370a, 370b in this embodiment include but are not limited to rectangles, circles or arbitrary shapes, and the shapes of the engaging portions 340a, 340b correspond to the shapes of the protrusions 370a, 370b. In addition, in order to stabilize the structural strength of the liquid crystal display device 300 , in this embodiment, a locking element 360 is used to lock the outer frame 350 and the first frame body 340 .

In summary, the liquid crystal display device of the present invention has the following advantages:

1. The plastic frame of the backlight module of the liquid crystal display device is composed of two frames. Therefore, when the lamp tube or light-emitting element of the backlight module needs to be replaced, only the frame with the light source needs to be removed for replacement or maintenance. The liquid crystal display Therefore, the device can simplify the procedure of rework during maintenance and further reduce the cost of maintenance.

2. The liquid crystal display device does not need to dismantle the outer frame and the overall plastic frame structure during maintenance, and does not need to dismantle the liquid crystal display panel and the optical film, so the optical film will not be damaged.

Although the present invention has been disclosed in conjunction with the above preferred embodiments, it is not intended to limit the present invention. Any skilled person can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall prevail as defined by the appended claims.

Claims (21)

1. A liquid crystal display device, comprising: Backlight module; A liquid crystal display panel is arranged on the backlight module; a frame, including a plurality of frames, and the backlight module is arranged in the space surrounded by the frame; an outer frame, arranged outside the frame, and partially covering the backlight module and the liquid crystal display panel; and The fixing piece is used for fixing the frame bodies. 2. The liquid crystal display device as claimed in claim 1, wherein the frames include a first frame and a second frame, and the first frame and the second frame are formed from the liquid crystal display panel to the backlight module stack configuration. 3. The liquid crystal display device as claimed in claim 2, wherein the fixing member passes through the second frame body to the first frame body for locking the first frame body and the second frame body. 4. The liquid crystal display device as claimed in claim 2, wherein the fixing member is provided with two protrusions from both ends, and the first frame body and the second frame body respectively have a first fastening portion and a second fastening portion , and the first fastening portion and the second fastening portion are disposed on a side close to the outer frame, and the fixing member is fastened with the first fastening portion and the second fastening portion through the protrusions. 5. The liquid crystal display device as claimed in claim 4, wherein the shapes of the protrusions include rectangle, circle or any shape, and the shapes of the protrusions correspond to the first buckle part and the second buckle The shape of the joint. 6. The liquid crystal display device as claimed in claim 1, wherein the backlight module comprises a plurality of optical films and a backlight, the optical films are arranged on the first frame, and the backlight is arranged on the second On the second frame. 7. The liquid crystal display device as claimed in claim 1, wherein the backlight module comprises a backlight and a light guide plate, the backlight is disposed on two sides of the backlight module, and the light guide plate is disposed on one side of the backlight. 8. The liquid crystal display device as claimed in claim 6, wherein the optical films comprise a diffusion film, a brightness enhancement film, a prism film, a wide viewing angle film or a combination of these films, and the backlight source comprises a light emitting diode, a cooling Cathode lamps, hot cathode lamps or cold cathode fluorescent flat lamps. 9. The liquid crystal display device as claimed in claim 1, wherein the frame and the material thereof comprise an elastic material or plastic. 10 . The liquid crystal display device as claimed in claim 1 , wherein the frames are formed by plastic injection molding. 11 . 11. The liquid crystal display device as claimed in claim 1, wherein the fixing member comprises a screw, a bolt or a clamping member. 12. The liquid crystal display device as claimed in claim 1, further comprising a locking element for locking the outer frame and the frame. 13. A backlight module suitable for a liquid crystal display device, comprising: The frame includes a first frame body and a second frame body, and the first frame body and the second frame body are stacked; a backlight, arranged on the second frame; a plurality of optical films arranged on the first frame and located above the backlight; and The fixing part is used for fixing the first frame body and the second frame body. 14. The liquid crystal display device as claimed in claim 13, wherein the material of the first frame and the second frame includes elastic material or plastic. 15. The liquid crystal display device as claimed in claim 13, wherein the fixing member passes through the second frame body to the first frame body for locking the first frame body and the second frame body, or the The fixing part is provided with two protrusions from both ends, the first frame body and the second frame body respectively have a first fastening part and a second fastening part, and the protrusions of the fixing part are respectively fastened to the Inside the first fastening part and the second fastening part. 16. The liquid crystal display device as claimed in claim 13, wherein the fixing member comprises a screw, a bolt or a clamping member. 17. The liquid crystal display device as claimed in claim 13, wherein the optical films comprise a diffusion film, a brightness enhancement film, a prism film, a wide viewing angle film or a combination of these films, and the backlight source comprises a light-emitting diode, a cooling Cathode lamps, hot cathode lamps or cold cathode fluorescent flat lamps. 18. A frame structure suitable for a liquid crystal display device, comprising a plurality of frames, the frames are stacked on each other, and the frames are fixed by a fixing member. 19. The frame structure according to claim 18, wherein the fixing member comprises a screw, a bolt or a clamping member. 20. The frame structure according to claim 18, wherein the fixing member passes through the frame bodies and is used to lock the frames; or the fixing member is provided with two protrusions from both ends, and the frame bodies have multiple a fastening part, and the fixing part is respectively fastened into the fastening parts of the frames through the protrusions. 21. The frame structure as claimed in claim 18, wherein the material of the frames comprises elastic material or plastic.

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