FIELD OF THE INVENTION
The present invention relates to liquid crystal display (LCD) devices, and more particularly to an LCD device having a metal shield with a fixing unit and a shielding unit, the fixing unit being used to fix the shielding unit.
GENERAL BACKGROUND
A typical LCD device has the advantages of portability, low power consumption, and low radiation, and has been widely used in various portable information products such as notebooks, personal digital assistants (PDAs), video cameras, and the like. The LCD device includes a frame, and the frame may be hung on the wall or supported on the top of a table.
Referring to FIG. 8, an exploded, isometric view of a typical LCD device is shown. The LCD device 10 includes a front frame 11, a display module 12, a printed circuit board (PCB) 13, a metal shield 14, and a rear frame 15 arranged in that order from left to right. The metal shield 14 is used for shielding electro magnetic interference (EMI). The display module 12, the PCB 13, and the metal shield 14 are secured between the front frame 11 and the rear frame 15. The rear frame 15 includes a plurality of first through holes 151.
Referring also to FIG. 9, an enlarged, isometric view of the metal shield 14 is shown. The metal shield 14 includes a back frame 141 and a plurality of rivets 140. The back frame 141 includes a bottom plate 142, and a plurality of side walls 143 perpendicularly extending from edges of the bottom plate 142. The bottom plate 142 and the side walls 143 cooperatively form an accommodating space to accommodate the PCB 13. The bottom plate 142 includes a plurality of second through holes 144 corresponding to the first through holes 151, respectively. The rivets 140 correspond to the second through holes 144 respectively, and are used to close up the metal shield 14 and the rear frame 15 via the first and second through holes 151, 144.
Each rivet 140 has a cylinder structure with an opening (not shown), and a thread (not shown) is disposed on an inner surface of the rivet 140 to enable the rivet 140 to function as a nut. The rivets 140 are further used for sealing the second through holes 144, so as to prevent conductive media such as iron dust from entering the PCB 13. When the LCD device 10 needs to be hung on a wall, the rivets 140 are also used to fit corresponding bolts to fix the LCD device 10 to a wall hanging device on the wall.
Referring to FIG. 10, an assembled view of the LCD device 10 is shown. When the LCD device 10 has been assembled, the PCB 13 is accommodated in the accommodating space of the metal shield 14. The front frame 11 and the rear frame 15 secure the display module 12, the PCB 13, and the metal shield 14. The openings of the rivets 140 correspond to the first through holes 151, respectively.
However, during the assembling process, the rivets 140 need to be placed in the second through holes 144 manually, and then be fixed to the bottom plate 142 by a machine. Thus the assembling process of the LCD device 10 is unduly complicated and inefficient.
What is needed, therefore, is a LCD device that can overcome the above-described deficiencies.
SUMMARY
An exemplary liquid crystal display device includes a rear frame including a plurality of first through holes and a shield including a back frame. The back frame includes a plurality of second through holes corresponding to the first through holes, respectively. The back frame further includes a plurality of fixing units, and the shield further includes a plurality of shielding units corresponding to the fixing units respectively. Each of the shielding units is fixed to a corresponding one of the fixing units by insert directly into the fixing unit.
Another exemplary liquid crystal display device includes a rear frame including a plurality of first through holes and a shield including a back frame. The back frame includes a plurality of second through holes corresponding to the first through holes, respectively. The back frame further includes a plurality of fixing units, and the shield further includes a plurality of shielding units corresponding to the fixing units respectively. Each of the fixing units includes two guiding grooves and an elastic trip cooperatively to fix a corresponding one of the shielding units.
Other novel features and advantages will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, all the views are schematic.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded, isometric view of an LCD device according to an exemplary embodiment of the present invention, the LCD device including a metal shield.
FIG. 2 is an enlarged, isometric view of the metal shield of the LCD device of FIG. 1, the metal shield including a plurality of shielding units.
FIG. 3 is an enlarged, isometric view of one of the shielding units of the metal shield of FIG. 2.
FIG. 4 is an enlarged, isometric view of a circled portion IV of FIG. 2.
FIG. 5 is an assembled view of the metal shield of FIG. 2.
FIG. 6 is an enlarged, isometric view of a circled portion VI of FIG. 5.
FIG. 7 is an assembled view of the LCD device of FIG. 1.
FIG. 8 is an exploded, isometric view of a conventional LCD device, the LCD device including a metal shield.
FIG. 9 is an enlarged, isometric view of the metal shield of the LCD device of FIG. 8.
FIG. 10 is an assembled view of the LCD device of FIG. 8.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Reference will now be made to the drawings to describe preferred and exemplary embodiments of the present invention in detail.
Referring to FIG. 1, an exploded, isometric view of an LCD device according to an exemplary embodiment of the present invention is shown. The LCD device 20 includes a front frame 21, a display module 22, a PCB 23, a metal shield 24, and a rear frame 25 arranged in that order from left to right. The front frame 21 and the rear frame 25 can cooperate to secure the display module 22, the PCB 23, and the metal shield 24 therebetween. The rear frame 25 includes a plurality of first through holes 251.
Referring also to FIG. 2, an enlarged, isometric view of the metal shield 24 is shown. The metal shield 24 is preferably made of iron, and therefore can reduce or even eliminate EMI. The metal shield 24 includes a back frame 241 and a plurality of shielding units 240. The shielding units 240 are made of insulating and fireproofing materials. The back frame 241 includes a bottom plate 242, and a plurality of side walls 243 perpendicularly extending from edges of the bottom plate 242. The bottom plate 242 and the side walls 243 cooperatively form an accommodating space to accommodate the PCB 23. The bottom plate 242 includes a plurality of fixing units 245 and a plurality of second through holes 244 corresponding to the first through holes 251. The shielding units 240 correspond to the fixing units 245, respectively. Each fixing unit 245 is used to fix the corresponding shielding unit 240, so as to prevent conductive media such as iron dust from entering the PCB 23 via the corresponding second through hole 244. The second through holes 244 may be formed by stamping the bottom plate 242. A thread (not labeled) is disposed on an inner surface of each second through hole 244 to enable the second through hole 244 to function as a nut. When the LCD device 20 needs to be hung on a wall, the second through holes 244 are used to fit corresponding bolts to fix the LCD device 20 to a wall hanging device on the wall.
Referring also to FIG. 3, an enlarged, isometric view of one of the shielding units 240 is shown. The shielding unit 240 includes a main body 2401 having a rectangular shape, a first side wall 2501, a second side wall 2502, and a third side wall 2503. The three side walls 2501, 2502, and 2503 are connected successively. The first and third side walls 2501, 2503 perpendicularly extend from two opposite edges of the main body 2401, respectively. The second side wall 2502 slantindicularly extends outwards from another edge between the two opposite edges of the main body 2401. A first slide arm 2510 perpendicularly extends outwards from a top edge of the first side walls 2501, and a second slide arm 2530 perpendicularly extends outwards from a top edge of the third side walls 2503. A stop arm 2520 extends outwards from a top edge of the second side walls 2502. The first and second slide arms 2510, 2530, and the stop arm 2520 are parallel to the main body 2401. The shielding unit 240 further includes a protrusion 2402 having a columniform shape, and a blind hole 2403 disposed through the main body 2401 and extends through to the protrusion 2402. The protrusion 2402 is disposed at a center of the main body 2401 and disposed opposite to the three side walls 2501, 2502, and 2503.
Referring also to FIG. 4, an enlarged, isometric view of a circled portion IV of FIG. 2 is shown. The fixing unit 245 includes two guiding grooves 2450 and an elastic trip 2460, which cooperate to fix one corresponding shielding unit 240. Each guiding groove 2450 includes an L-shaped slide wall (not labeled) inwardly extending perpendicularly from the bottom plate 242 and an extension portion 2453. The extension portion 2453 extends from a top edge (not labeled) of the L-shaped slide wall, and is parallel to the bottom plate 242. The L-shaped slide wall includes a main portion 2451 and a bent portion 2452. The bent portion 2452 is connected to an end (not labeled) of the main portion 2451 and perpendicular to the main portion 2451. The two guiding grooves 2450 are parallel and face to face. The elastic trip 2460 is disposed near another end (not labeled) of the main portion 2451. The two guiding grooves 2450 and the elastic trip 2460 surround one corresponding second through hole 244.
A gap m between the two guiding grooves 2450 is approximately equal to a width of the main body 2401 of the shielding unit 240. A vertical distance h between the extension portion 2453 and the bottom plate 242 is approximately equal to a thickness of the first slide arm 2510. A height n of the second through hole 244 from the bottom plate 242 is equal to or less than a sum of a height of the first side wall 2501 and a thickness of the main body 2401.
Referring to FIGS. 5-6, when the metal shield 24 is assembled, each shielding unit 240 presses the elastic trip 2460 of one corresponding fixing unit 245, the first and second slide arms 2510, 2530 of the shielding unit 240 are slided into the two guiding grooves 2450 of the fixing unit 245, whereat butt against the bent portions 2452, respectively. After that, the elastic trip 2460 ejects, and the stop arm 2520 butts against the elastic trip 2460 of the fixing unit 245. Thus the shielding units 240 are fixed to the fixing units 245 respectively, and the blind hole 2403 of the shielding unit 240 is aligned to one corresponding second through hole 244 of the bottom plate 242.
Referring to FIG. 7, an assembled view of the LCD device 20 is shown. When the LCD device 20 has been assembled, the PCB 23 is accommodated in the accommodating space of the metal shield 24. The front frame 21 and the rear frame 25 secure the display module 22, the PCB 23, and the metal shield 24. The second through holes 244 correspond to the first through holes 251 of the rear frame 25, respectively.
In the assembling process of the LCD device 20, the shielding unit 240 can be directly insert into the fixing unit 245 to be fixed, and cooperatively with the fixing unit 245 to seal the second through hole 244. Thus the assembling process of the LCD device 20 is simplified and efficient.
It is believed that the present embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the examples hereinbefore described merely being preferred or exemplary embodiments of the invention.
Patent Application
20080266485
