Mounting structure of liquid crystal display device

The present invention provides a mounting structure of a liquid crystal display device, in which a first side board (213) of a backplane (21) includes an outward-raised first connection section (215) formed thereon so that the first side board (213) forms an insertion space with respect to the first connection section (215). A second side board (83) of the front bezel (8) includes an inward-recessed second connection section (85) formed thereon to correspond to the first connection section (15) so that the second side board (83) forms a channel (87) with respect to the second connection section (85). The second connection section (85) is inserted into the insertion space and is positioned against the first connection section (215). The first connection section (215) is received in the channel (87). The first connection section (215) includes a through hole (216) formed therein. The second connection section (85) includes a threaded hole (851) formed therein to correspond to the through hole (216). A bolt (10) is received through the through hole (216) to be screwed to the threaded hole (851) so as to fix the second side board (83) in such as way as to be mounted on the first side board (213).

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to the field of liquid crystal displaying, and in particular to a mounting structure of a liquid crystal display device.

2. The Related Arts

Liquid crystal displays (LCDs) have a variety of advantages, such as thin device body, low power consumption, and being free of radiation, and are thus of wide applications, such as mobile phones, personal digital assistants (PDAs), digital cameras, computer monitors, and notebook computer screens.

Most of the liquid crystal displays that are currently available in the market are backlighting liquid crystal displays, which comprise an enclosure, a liquid crystal panel arranged in the enclosure, and a backlight module mounted in the enclosure. The backlight modules can be classified in two types, namely a side-edge backlight module and a direct backlight module, according to the site where light gets incident. The side-edge backlight module generally comprises a backplane, a backlight source, a reflector plate, a light guide plate, and an optical film assembly, in which an LED light bar, serving as the backlight source, is arranged at an edge of the backplane to be located rearward of one side of the liquid crystal panel. The LED light bar emits light that enters the light guide plate (LGP) through a light incident face at one side of the light guide plate and is projected out of a light exit face of the light guide plate, after being reflected and diffused, to pass through the optic film assembly so as to form a planar light source for the liquid crystal panel.

With the progress of the techniques that are used to manufacture the liquid crystal displays, the development of the liquid crystal displays is in a trend toward bezel slimming. For the known liquid crystal displays that adopt side-edge backlight modules, due to the need for bezel slimming, bolts that are used to mount and fix corresponding components and the lengths of the threads thereof are getting shorter and shorter. Referring toFIGS. 1-3, a conventional mounting structure of a liquid crystal display device is shown, which comprises a backlight module100, a mold frame300mounted in the backlight module100, a liquid crystal display panel500mounted on the mold frame300, and a front bezel700mounted on the liquid crystal display panel500.

The backlight module100comprises: a backplane110, a light guide plate130mounted in the backplane110, and a backlight source150mounted to the backplane110.

To shorten the distance from the front bezel700to the light guide plate130, the backplane110is arranged to provide an additional function to serve as a heat dissipation board and comprises a bottom board111and a first side board113mounted to one side of the bottom board111. The backlight source150is mounted to an inside surface of the first side board113. The front bezel700comprises a front board720and a second side board750mounted to one side of the front board720. The second side board750is set on and covers atop the first side board113.

The second side board750of the front bezel700comprises a through hole751formed therein. The first side board113of the backplane110comprises a threaded hole115formed therein to correspond to the through hole751. A bolt900is received through the through hole751to be screwed in the threaded hole115for fixing and mounting the front bezel700and the backplane110together.

Since the backplane110is often made of an aluminum material or a copper material that has high thermal conductivity, but low stiffness and is thus a relatively soft material, it is easy that the threaded hole115cannot provide a tight engagement with the thread of the bolt900, leading to insufficient coupling strength, easy occurrence of thread stripping, so s to affect the effect of fixing and mounting between the front bezel700and the backplane110.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a mounting structure of a liquid crystal display device, which makes fixing and mounting between a front bezel and a backplane more secure and reliable so as not to affect bezel slimming of the liquid crystal display device and also to make the structure simple and each to achieve.

To achieve the above object, the present invention provides a mounting structure of a liquid crystal display device, which comprises: a backlight module, a mold frame mounted in the backlight module, a liquid crystal display panel mounted on the mold frame, and a front bezel mounted on the liquid crystal display pane. The backlight module comprises a backplane, a light guide plate mounted in the backplane, and a backlight source mounted in the backplane. The backplane comprises a bottom board and a first side board mounted to one side of the bottom board. The backlight source is mounted to an inside surface of the first side board. The front bezel comprises a front board and a second side board mounted to one side of the front board. The second side board is set on and covers the first side board. The first side board comprises an outward-raised first connection section formed thereon so that first side board forms an insertion space with respect to the first connection section. The second side board comprises an inward-recessed second connection section formed thereon to correspond to the first connection section so that the second side board forms a channel with respect to the second connection section. The second connection section is insertable into the insertion space and positionable against the first connection section. The first connection section is receivable in the channel. The first connection section comprises a through hole formed therein, the second connection section comprising a threaded hole formed therein to correspond to the through hole. A bolt is receivable through the through hole and screwable to the threaded hole so as to fix the second side board in such a way as to be mounted on the first side board.

The through hole of the first connection section is a stepped through hole. The bolt has a head that is receivable in the stepped through hole.

The first connection section has a free end that has a height lower than height of the first side board.

The first connection section has an outside surface that does not project beyond an outside surface of the second side board and the second connection section has an inside surface that does not project beyond an inside surface of the first side board.

The outside surface of the first connection section is substantially flush with the outside surface of the second side board and the inside surface of the second connection section is substantially flush with the inside surface of the first side board.

The bolt comprises a cruciform type cylindrical head bolt, of which the head does not protrude outside the outside surface of the first connection section and a tip thereof being not projecting beyond the inside surface of the second connection section.

The front bezel that is greater than stiffness of the backplane.

The backplane is made of an aluminum sheet and the front bezel is made of an engineering plastic material of acrylonitrile butadiene styrene (ABS).

The mold frame is mounted on the first side board.

The backlight module further comprises a bottom reflector plate that is arranged on one side of the light guide plate that faces the bottom board and an optical film assembly that is arranged on one side of the light guide plate that faces the liquid crystal display panel.

The present invention also provides a mounting structure of a liquid crystal display device, which comprises: a backlight module, a mold frame mounted in the backlight module, a liquid crystal display panel mounted on the mold frame, and a front bezel mounted on the liquid crystal display pane, the backlight module comprising a backplane, a light guide plate mounted in the backplane, and a backlight source mounted in the backplane, the backplane comprising a bottom board and a first side board mounted to one side of the bottom board, the backlight source being mounted to an inside surface of the first side board, the front bezel comprising a front board and a second side board mounted to one side of the front board, the second side board being set on and covering the first side board, the first side board comprising an outward-raised first connection section formed thereon so that first side board forms an insertion space with respect to the first connection section, the second side board comprising an inward-recessed second connection section formed thereon to correspond to the first connection section so that the second side board forms a channel with respect to the second connection section, the second connection section being insertable into the insertion space and positionable against the first connection section, the first connection section being receivable in the channel, the first connection section comprising a through hole formed therein, the second connection section comprising a threaded hole formed therein to correspond to the through hole, a bolt being receivable through the through hole and screwable to the threaded hole so as to fix the second side board in such a way as to be mounted on the first side board;

wherein the through hole of the first connection section is a stepped through hole, the bolt having a head that is receivable in the stepped through hole;

wherein the first connection section has a free end that has a height lower than height of the first side board;

wherein the first connection section has an outside surface that does not project beyond an outside surface of the second side board and the second connection section has an inside surface that does not project beyond an inside surface of the first side board;

wherein the outside surface of the first connection section is substantially flush with the outside surface of the second side board and the inside surface of the second connection section is substantially flush with the inside surface of the first side board; and

wherein the bolt comprises a cruciform type cylindrical head bolt, of which the head does not protrude outside the outside surface of the first connection section and a tip thereof being not projecting beyond the inside surface of the second connection section.

The front bezel that is greater than stiffness of the backplane.

The backplane is made of an aluminum sheet and the front bezel is made of an engineering plastic material of acrylonitrile butadiene styrene (ABS).

The mold frame is mounted on the first side board.

The backlight module further comprises a bottom reflector plate that is arranged on one side of the light guide plate that faces the bottom board and an optical film assembly that is arranged on one side of the light guide plate that faces the liquid crystal display panel.

The efficacy of the present invention is that the present invention provides a liquid crystal display device, in which the first side board of the backplane is provided with an outward-raised first connection section and the second side board of the front bezel is provided with an inward-recessed second connection section corresponding to the first connection section, whereby the first connection section is receivable in the second connection section and a bolt is used to join the first connection section and the second connection section so as to fix and mount the front bezel and the backplane together. Thus, on the one hand, no additional connection component is added so as not to affect bezel slimming of the liquid crystal display device, and on the other hand, the front bezel is made of a material that is apparently stiffer than that of the backplane so that the mounting between the front bezel and the backplane is secure and reliable and the structure is easy and can be achieved readily.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring toFIGS. 4-6, the present invention provides a mounting structure of a liquid crystal display device, which comprises: a backlight module2, a mold frame4mounted in the backlight module2, a liquid crystal display panel6mounted on the mold frame4, and a front bezel8mounted on the liquid crystal display panel6. The backlight module2comprises a backplane21, a light guide plate23mounted in the backplane21, and a backlight source25mounted in the backplane21.

To shorten the distance from the front bezel8to a light incident side of the light guide plate23, the backplane21is arranged to additional provide a function of serving as a heat dissipation plate and comprises: a bottom board211and a first side board213mounted to one side of the bottom board211. The backlight source25is mounted to an inside surface of the first side board213. The first side board213comprises an outward-raised first connection section215formed thereon so that first side board213forms an insertion space with respect to the first connection section215. The first connection section215has a free end that has a height lower than the height of the first side board213. The first connection section215comprises a through hole216formed therein and preferably, the through hole216is a stepped through hole.

The backplane21is made of a material that has high thermal conductivity and low stiffness and is relatively soft. In the instant embodiment, the backplane21is made of an aluminum sheet.

The front bezel8comprises a front board81and a second side board83mounted to one side of the front board801. The second side board83is set on and covers atop the first side board213. The second side board83comprises an inward-recessed second connection section85formed thereon to correspond to the first connection section215so that the second side board83forms a channel87with respect to the second connection section85. The channel87has a width that is greater than width of the second connection section85and the channel87has a height greater than the second connection section85. The second connection section85comprises a threaded hole851formed therein to correspond to the through hole216.

The front bezel8has a stiffness that is greater than the stiffness of the backplane21. In the instant embodiment, the front bezel8is made of an engineering plastic material of ABS (Acrylonitrile Butadiene Styrene), which has stiffness greater than that of the aluminum sheet.

To mount the liquid crystal display device, the second connection section85is inserted into the insertion space and is positioned against the first connection section215. The first connection section215is received in the channel87. A bolt10is received through the through hole216to be screwed in the threaded hole851so as to fix the second side board83of the front bezel8in such a way as to be mounted on the first side board213of the backplane21.

Since the threaded hole851is formed in the front bezel8that is made of an engineering plastic material of ABS and the through hole216is formed in the backplane21that is made of an aluminum sheet, the material of the front bezel8is apparently stiffer than that of the backplane21, so that the bolt10that extends through the through hole216to get screwed in the threaded hole851would allow the threaded hole851to tightly engage the thread of the bolt10, helping improve coupling strength between the two, preventing thread stripping , enhancing the fixing and mounting effect between the front bezel8and the backplane21.

Further, the first connection section215has an outside surface that does not project beyond an outside surface of the second side board83so as to ensure outside appearance aesthetics of the liquid crystal display device. The second connection section85has an inside surface that does not project beyond an inside surface of the first side board213in order to facilitate mounting off the backlight source25. Preferably, the outside surface of the first connection section215is substantially flush with the outside surface of the second side board83and the inside surface of the second connection section85is substantially flush with the inside surface of the first side board213.

The bolt10can be a cruciform type cylindrical head bolt, of which the head can be received in the stepped through hole without protruding outside the outside surface of the first connection section215so as to ensure the outside appearance aesthetics of the liquid crystal display device and a tip thereof is not projecting beyond the inside surface of the second connection section85to facilitate mounting of the backlight source25.

The mold frame4is mounted on the first side board213.

The backlight module2may further comprises a bottom reflector plate24that is arranged on the side of the light guide plate23that faces the bottom board211and an optical film assembly26that is arranged on the side of the light guide plate23that faces the liquid crystal display panel6.

In summary, the present invention provides a liquid crystal display device, in which the first side board of the backplane is provided with an outward-raised first connection section and the second side board of the front bezel is provided with an inward-recessed second connection section corresponding to the first connection section, whereby the first connection section is receivable in the second connection section and a bolt is used to join the first connection section and the second connection section so as to fix and mount the front bezel and the backplane together. Thus, on the one hand, no additional connection component is added so as not to affect bezel slimming of the liquid crystal display device, and on the other hand, the front bezel is made of a material that is apparently stiffer than that of the backplane so that the mounting between the front bezel and the backplane is secure and reliable and the structure is easy and can be achieved readily.