KR100828518B1 - Backlight assembly - Google Patents

Abstract

Disclosed is a backlight assembly capable of easily replacing a lamp. Bottom having a mold frame consisting of four sidewalls and having a first protrusion on one sidewall, a bottom surface having four edges, three sidewalls extending from three edges and a second protrusion protruding from one edge, respectively The chassis is provided. The first protrusion and the second protrusion are fastened to each other by screws, and the bottom chassis is fixed to rotate from the mold frame with the screw as the rotation axis. As a result, the bottom chassis can be easily opened from the mold frame, and the lamp stored in the mold frame can be taken out and replaced.

Lamp, Replacement, Bottom, Mold, L-Shaped, U-Shaped

Description

Backlight Assembly {BACKLIGHT ASSEMBLY}

1 is an exploded perspective view of a liquid crystal display according to an exemplary embodiment of the present invention.

2 is a partial perspective view of FIG. 1 described above.

3 is a partial perspective view of the first protrusion and the second protrusion illustrated in FIG. 2.

FIG. 4 is a front view of the first protrusion and the second protrusion of FIG. 3 after coupling. FIG.

FIG. 5 is a partial perspective view of the backlight assembly shown in FIG. 4 described above. FIG.

6 is a partial perspective view of a backlight assembly according to another embodiment of the present invention.

7 is a perspective cross-sectional view of the third protrusion along cut line I-I of FIG. 6 described above.

8 is a partial perspective view of a backlight assembly according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

300: liquid crystal display 310: backlight assembly

320: L-shaped lamp 360, 900: mold frame

361: first protrusion 361a: first fastening hole

370, 930: bottom chassis 371a, 372a: second fastening hole

371 and 372: second protrusion 380: liquid crystal display panel assembly

The present invention relates to a backlight assembly, and more particularly, to a backlight assembly capable of replacing the lamp.

In general, the liquid crystal display is a light-receiving device that displays an image by adjusting the amount of light coming from the outside, and thus requires a separate light source, that is, a backlight assembly, for irradiating light to the liquid crystal display panel.

The backlight assembly uniforms the edge-type backlight assembly having a structure in which the light of the lamp is incident on the liquid crystal display panel through the light guide plate and the light generated from the lamp by the diffuser plate. And a backlight assembly of a direct method having a structure to be incident on the liquid crystal display panel.

A general edge type liquid crystal display device includes a backlight assembly that generates light largely, a liquid crystal display panel assembly that receives light from the backlight assembly, and displays a predetermined image, and a storage container housing the same.

The backlight assembly includes a lamp for generating light, a light guide plate for guiding light generated from the lamp toward the liquid crystal display panel assembly, optical sheets provided on an upper side of the light guide plate, a mold frame for storing them, and a mold frame provided below the mold frame. In combination with the bottom chassis to complete the backlight assembly.

After the liquid crystal display panel assembly is seated in the mold frame of the backlight assembly, the top chassis defines an effective screen area of the liquid crystal display panel assembly and fixes the liquid crystal display panel assembly.

In general, in a liquid crystal display using a straight lamp, the lamp stored in the liquid crystal display may be drawn out from the inside of the mold frame to the outside through a sidewall of the mold frame in a sliding manner.

On the other hand, in the liquid crystal display device using the L-shaped lamp, the L-shaped lamp is accommodated inside the liquid crystal display device between one sidewall of the mold frame and one side surface of the light guide plate.

However, the liquid crystal display having such a structure penetrates the mold frame, the bottom chassis, and the top chassis in a sliding manner, as described above, due to interference by sidewalls of the mold frame and the bottom chassis. It is impossible to withdraw outside of.

Therefore, in order to replace the L-shaped lamp when the L-shaped lamp reaches the end of life, there is a problem in that the liquid crystal display device needs to be disassembled in the reverse order of assembling the liquid crystal display device. There is a problem that defects such as scratches may occur on the lower substrate.

Of course, in the case of using the U-shaped lamp as well as the L-shaped lamp, there is the same problem in replacing the U-shaped lamp like the L-shaped lamp.

Accordingly, the present invention is to solve this problem of the prior art, an object of the present invention is to provide a backlight assembly that is easy to replace the lamp.

According to one aspect of the present invention, a backlight assembly includes: a light generator for generating light; A mold frame including four sidewalls to accommodate the light generating unit and a first storage container having a plurality of first protrusions on one of the sidewalls; A bottom surface having four edges, three side walls each extending from three edges of the bottom surface, and a second protrusion projecting from one edge of the bottom surface, wherein the second protrusion and the first protrusion are provided. The bottom chassis is fixed to the mold frame through fastening with the protrusions, and is a second storage container that can be opened and closed by rotating based on the fastened first and second protrusions.

In addition, a backlight assembly according to another feature for achieving another object of the present invention, the light generating unit for generating light; A mold frame having four sidewalls to accommodate the light generating unit, and a first storage container having coupling grooves formed at edges of the sidewalls facing each other; And a bottom surface having four edges, and three sidewalls extending from three edges of the bottom surface, respectively, and edge portions of the sidewalls facing each other are respectively provided with coupling portions to correspond to the coupling grooves. And a bottom chassis that is fixed to the first storage container through fastening with the coupling groove, and is opened and closed by rotating based on the coupled coupling portion and the coupling groove.

According to the backlight assembly, it is possible to facilitate the replacement of the lamp when the rework (rework) of the backlight assembly by implementing the hinge coupling between the first housing and the second housing.

Hereinafter, a backlight assembly according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view of a liquid crystal display according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the liquid crystal display 300 according to an exemplary embodiment of the present invention is a liquid crystal display that displays a predetermined image by receiving light from the backlight assembly 310 and the backlight assembly 310 that provide large amounts of light. Panel assembly 380.

In detail, the backlight assembly 310 includes an L-shaped lamp 320 for generating light, a light guide plate 330 for guiding light generated from the L-shaped lamp 320 to the liquid crystal display panel assembly 380, and a light guide plate. A plurality of optical sheets 340 that are seated on the upper side of the 330 to uniform the luminance of the light emitted from the light guide plate 330 and a reflector for reflecting the light leaked from the light guide plate 330 back to the light guide plate 330 side ( It consists of a light generating means consisting of 350, a mold frame 360 for receiving the light generating means and a bottom chassis 370 provided below the mold frame 360 to be coupled to the mold frame 360.

The mold frame 360 has four sidewalls and four top walls each extending from the upper edge of the four sidewalls to the inside of the mold frame 360 to form an accommodation space. The side wall is provided with a plurality of first protrusions 361.

The L-shaped lamp 320 is housed inside the mold frame 360, and the light emitted from the L-shaped lamp 320 is not illustrated in the inner wall of the mold frame 360 adjacent to the L-shaped lamp 320. Reflecting means (not shown) for reflecting the light to the side of the light guide plate 330, that is, the light incident surface side of the light guide plate 330 is coated or attached to the inner wall of the mold frame 360.

The bottom chassis 370 protrudes from a bottom surface having four edges, three side walls extending from the three edges of the bottom surface, and one edge of the bottom surface, so that the first protrusion 361 of the mold frame 360 is formed. And second protrusions 371 and 372 which are opposed to each other.

In contrast, the liquid crystal display panel assembly 380 includes a color filter substrate 381, a thin film transistor substrate 382, and a liquid crystal (not shown) enclosed therebetween, and displays a predetermined image. And a driving member (not shown) for providing a driving signal to display an image on the liquid crystal display panel 383.

The drive member includes a data PCB 384 for applying a drive signal to a data line of the liquid crystal display panel 383, a data side TCP 385 for transmitting the data drive signal to the liquid crystal display panel 383, and a liquid crystal display. The gate PCB 386 applies a drive signal to the gate line of the panel 383, and the gate side TCP 387 transfers the gate drive signal.

The mold frame 360 sequentially receives the light generating means including the L-shaped lamp 320, the light guide plate 330, the optical sheet 340, and the reflecting plate 350 described above from the lower side to the upper side.

After storing the light generating means, the mold frame 360 is coupled to the bottom chassis 370, and the liquid crystal display panel 383 is seated on the upper side of the mold frame 360. Although not shown in the drawing, a middle chassis may be provided between the mold frame 360 and the liquid crystal display panel 383 so that the liquid crystal display panel 383 may be seated on the middle chassis.

A groove 391 is formed at one sidewall of the top chassis 390 at a position corresponding to the first protrusion 361 of the mold frame 360 and the second protrusions 371 and 372 of the bottom chassis 370. When the chassis 390 is coupled to face the mold frame 360, the sidewalls of the top chassis 390 cover the first protrusion 361 and the second protrusion 371 and 372 so that the liquid crystal display device 300 may be formed. Unnecessary increase in size can be avoided.

The liquid crystal display panel 383 is seated on the mold frame 360, and the top chassis 390 provided on the upper side of the liquid crystal display panel 383 is combined with the mold frame 360 to fix the liquid crystal display panel 383. The liquid crystal display 300 is completed.

FIG. 2 is a partial perspective view of FIG. 1, in particular, a partial perspective view illustrating a coupling relationship between a first protrusion of a mold frame and a second protrusion of a bottom chassis.

Referring to FIG. 2, a hexahedral first protrusion 361 is provided on one sidewall of the mold frame 360, and the bottom surface 370a of the bottom chassis 370 corresponds to the first protrusion 361. At one side edge, the second protrusions 371 and 372 are provided in pairs.

The first protrusion 361 is provided below the sidewall of the mold frame 360 closest to the bottom surface 370a of the bottom chassis 370, and has a first width W1 outside the mold frame 360. Protrude to the thickness of. The first protrusion 361 is provided with a first fastening hole 361a penetrating the first protrusion 361 in a direction parallel to the sidewall of the mold frame 360.                     

The second protrusions 371 and 372 are provided in pairs on one side edge of the bottom surface 370a of the bottom chassis 370 so as to be opposed to the first protrusion 361 of the mold frame 360. A portion of the bottom surface 370a of the bottom chassis 370 protrudes to the outside of the bottom surface 370a, and the second protrusions 371 and 372 are formed by winding a portion of the protruding bottom surface 370a. .

As described above, the second protrusions 371 and 372 of the bottom surface 370a of the bottom chassis 370 are curled to correspond to the first coupling holes 361a of the first protrusion 361a. , 372a) is formed.

The second protrusions 371 and 372 are provided in pairs to be coupled to the first protrusions 361, and the second protrusions 371 and 372 provided in pairs are provided to be spaced apart from each other with a second width W2. The first protrusion 361 having the first width W1 is inserted into the second width W2 between the second protrusions 371 and 372. At this time, the first width W1 of the first protrusion 361 is the second width W2 between the second protrusions 371 and 372 so that the first protrusion 361 is inserted between the second protrusions 371 and 372. Must be less than).

After the first protrusion 361 is inserted between the second protrusions 371 and 372, the first protrusion 361 of the mold frame 360 and the second protrusions 371 and 372 of the bottom chassis 370 are formed. The first screw 410 passes through the first fastening hole 361a of the first protrusion 361 and the second fastening holes 371a and 372a of the second protrusions 371 and 372 to engage with the nut 420. Is fastened.

As a result, the bottom chassis 370 may rotate freely while the first screw 410 is fixed to the mold frame 360 by the rotation axis.

3 is a partial perspective view of the first protrusion and the second protrusion shown in FIG. 2, in particular, a partial perspective view of the backlight assembly of FIG.

Referring to FIG. 3, a first protrusion 361 is provided on a sidewall of the mold frame 360, and a first latching jaw 361b is disposed on a side surface of the first protrusion 361 where the first fastening hole 361a is formed. Is formed. In addition, a second locking step 371b is formed on a side surface of the second protrusion 371 facing the side surface of the first protrusion 361 where the first fastening hole 361a is formed.

The first locking jaw 361b protrudes from a side surface of the first protrusion 361 where the first fastening hole 361a is formed to a predetermined thickness. That is, an area corresponding to half of the side of the first protrusion 361 adjacent to the upper wall 360a of the mold frame 360 has a predetermined thickness and has a predetermined thickness on the side of the first protrusion 361b. It protrudes outward.

The second locking jaw 371b is formed on the side surface of the second protrusion 371 facing the side surface of the first protrusion 361 where the first fastening hole 361a is formed. In detail, the second locking step 371b protrudes from the edge of the bottom surface 370a to a predetermined thickness along the sidewall of the second protrusion 371.

Referring to FIG. 2, since the second protrusions 371 and 372 are provided in pairs to face both sides of the first protrusion 361, the first locking jaws 361b are provided at both sides of the first protrusion 361. The second protrusion 371 is formed on one side of the second protrusion 371, since the second protrusion 371 is formed on the side facing the side of the first protrusion 361.

FIG. 4 is a front view of the first and second protrusions of FIG. 3 after coupling, and in particular, a front view of the bottom chassis toward the side wall of the mold frame in order to explain a state in which the bottom chassis is opened from the mold frame.                     

Referring to FIG. 4, the first protrusion 361 and the second protrusion 371 and 372 are coupled by the first screw 410, and the bottom chassis 370 is connected to the first screw from the mold frame 360. 410 is opened at a predetermined angle with the rotation axis.

A process of opening the bottom chassis 370 from the mold frame 360 will be described with reference to FIG. 4.

When the bottom chassis 370 is coupled by the mold frame 360 and the first screw 410, the bottom chassis 370 may be removed from the mold frame to draw out the L-shaped lamp, which is not shown, to the outside of the mold frame 360. Separated from 360, the first screw 410 is rotated by the rotation axis.

At this time, the bottom chassis 370 is not rotated by a predetermined angle or more by the first locking jaws 361b formed in the first protrusion 361 and the second locking jaws 371b and 372b formed in the second protrusions 371 and 372. can not do it.

In detail, when the bottom chassis 370 having the second protrusions 371 and 372 having the second locking projections 371b and 372b rotates, when the bottom chassis 370 rotates by a predetermined angle or more, the first protrusions The first locking jaws 361a formed in the 361 and the second locking jaws 371b and 372b of the second protrusions 371 and 372 are in contact with each other. Accordingly, the first locking jaw 361b restrains the rotation of the second locking jaws 371b and 372b so that the bottom chassis 370 does not rotate more than a predetermined angle.

FIG. 5 is a partial perspective view of the backlight assembly shown in FIG. 4 described above. FIG.

Referring to FIG. 5, the bottom chassis 370 is opened at a predetermined angle from the mold frame 360, and the L-shaped lamp 320 is exposed to the outside.

The first protrusion 361 of the mold frame 360 and the second protrusions 371 and 372 of the bottom chassis 370 are fastened by the first screw 410, as described above with reference to FIG. 4. The bottom chassis 370 is fixed to the mold frame 360 by the first locking jaws 361b and the second locking jaws 371b and 372b.

When the bottom chassis 370 is rotated and opened from the mold frame 360, and the reflecting plate 350 illustrated in FIG. 1 is removed, the L-shaped lamp 320 stored inside the mold frame 360 is external. Will be exposed.

Therefore, when the lamp reaches the end of its life, the bottom chassis 370 can be easily opened from the mold frame 360 to replace the lamp.

FIG. 6 is a partial perspective view of a backlight assembly according to another exemplary embodiment of the present invention, and FIG. 7 is a perspective cross-sectional view of the third protrusion along the cutting line I-I of FIG. 6.

6 and 7, a third projection 362, 363 having a hexahedral shape is provided on one sidewall of the mold frame 360, and a bottom chassis (ie, a bottom chassis corresponding to the third protrusion 362, 363) is provided. One side edge of the bottom surface 370a of the 370 is provided with a fourth protrusion 373.

The third protrusions 362 and 363 protrude outwardly from the sidewall of the mold frame 360 with a predetermined thickness under the sidewall of the mold frame 360 closest to the bottom surface 370a of the bottom chassis 370. The third protrusions 362 and 363 are formed with third fastening holes 362a and 363a passing through the third protrusions 362 and 363 in a direction parallel to the sidewalls of the mold frame 360. 362 and 363 are provided in pairs and are spaced apart by a third width W3.                     

On the other hand, the fourth protrusion 373 is provided on one side edge of the bottom surface 370a of the bottom chassis 370 so as to face the third protrusions 362 and 363 of the mold frame 360 provided in pairs. have. A portion of the bottom surface 370a of the bottom chassis 370 protrudes with the fourth width W4, and the fourth protrusion 373 is formed by winding a portion of the protruding bottom surface 370a.

As shown in FIG. 6, a portion of the bottom surface 370a of the bottom chassis 370 is curled, and the third protrusion 362a of the third protrusions 362 and 363 is formed in the fourth protrusion 373. A fourth fastening hole 373a corresponding to 363a is formed.

A third between the third protrusions 362 and 363 so that the fourth protrusions 373 may be inserted between the third protrusions 362 and 363 provided as a pair for coupling the bottom chassis 370 and the mold frame 360 to each other. The width W3 should be larger than the fourth width W4 of the fourth protrusion 373.

After the fourth protrusion 373 is inserted between the third protrusions 362 and 363, the third protrusions 362 and 363 of the mold frame 360 and the fourth protrusion 373 of the bottom chassis 370 are coupled to each other. The second screw 700 may include a third fastening hole 362a of one third protrusion 362 of the third protrusions 362 and 363 and a fourth fastening hole of the fourth protrusion 373. It penetrates through 373a and is coupled to the third fastening hole 363a of the other third protrusion 363.

In other words, as illustrated in FIG. 7, the sidewalls of the mold frame 360 are provided with third protrusions 362 and 363 in pairs. The second screw 700 passes through the first third protrusion 362 into which the second screw 700 is inserted, and engages with a thread formed on the inner circumferential surface of the third fastening hole 363a of the second third protrusion 363. do.                     

As a result, the bottom chassis 370 may rotate freely while being fixed to the mold frame 360 by using the second screw 700 as the rotation axis.

Although not shown in the drawings, the second screw 700 shown in FIG. 6 is screwed into the third fastening hole 363a of the third protrusion 363 as well as shown in FIG. In combination with the nut 420, the bottom chassis 370 may be fixed to the mold frame 360.

In addition, similar to the backlight assembly 310 according to the exemplary embodiment of the present invention described with reference to FIGS. 1 to 5, the backlight assembly according to another exemplary embodiment of the present invention may further include the third protrusions 362 and 363. Each of the four protrusions 373 may be provided with a locking jaw to prevent the bottom chassis 370 from rotating above a predetermined angle.

8 is a partial perspective view of a backlight assembly according to another embodiment of the present invention, in particular the partial perspective view of the backlight assembly upside down.

Referring to FIG. 8, coupling grooves 910 are formed on opposite sidewalls of the mold frame 900, and the bottom chassis 930 is coupled to a position corresponding to the coupling groove 910 of the mold frame 900. The part 940 is provided.

In detail, the coupling groove 910 of the mold frame 900 has a shape recessed with a predetermined thickness inwardly of the mold frame 900 at the edge of the opposite sidewall of the mold frame 900, respectively, A fifth fastening hole 920 through which the third screw 960 penetrates is formed at 910, and although not shown in the drawing, a thread is formed on the inner circumferential surface of the fifth fastening hole 920.                     

The bottom chassis 930 consists of a bottom surface 930a with four edges and three sidewalls extending from the three edges of the bottom surface 930a, respectively. That is, the bottom chassis 930 has a bottom surface 930a and three sidewalls, and one side of the bottom surface 930a of the bottom chassis 930 is completely open.

Coupling portions 940 are provided at the edges of two opposite side walls of bottom chassis 930, respectively. In detail, the coupling part 940 is provided to correspond to the coupling groove 910 formed at each side edge of the mold frame 900, and is separated from the side wall of the bottom chassis 930 by a predetermined distance. Meanwhile, a sixth fastening hole 950 is formed in the coupling part 940 to correspond to the fifth fastening hole 920 formed in the coupling groove 910 of the mold frame 900.

The coupling portion 940 of the bottom chassis 930 is inserted into the coupling groove 910 of the mold frame 900, and the third screw 960 passes through the sixth coupling hole 950 of the coupling portion 940. It is coupled to the thread formed on the inner circumferential surface of the fifth fastening hole 920 of the coupling groove 910.

Since the bottom chassis 930 must be rotatable while the third screw 960 is fixed to the mold frame 900 by the rotation axis, the mold frame 900 and the bottom chassis 930 are formed by the third screw 960. The third screw 960 is tightened by the coupling portion 940 of the bottom chassis 930 so that the third screw 960 does not restrain the rotation of the bottom chassis 930.

This allows the bottom chassis 930 to freely rotate the third screw 960 on the rotation axis while being fixed to the mold frame 900.

Although not shown in the drawings, the first engaging jaw 361b and the second engaging jaw 371b as described above with reference to FIGS. 3 and 4 are coupled to the engaging groove 910 and the engaging portion 940 of FIG. 8. Each may be provided. Accordingly, when the bottom chassis 930 is rotated from the mold frame 900 by using the third screw 960 as the rotation axis, the bottom chassis 930 may be stopped at the mold frame 900 after being rotated by a predetermined angle or more. .

In the above-described embodiments, the backlight assembly using the L-shaped lamp has been described. However, the present invention can replace the lamp by opening the bottom chassis from the mold frame while the bottom chassis is fixed to the mold frame. It is apparent that the object of the present invention can be faithfully performed even in the case of the backlight assembly using the straight and U-shaped lamps, which are not limited to the backlight assembly using the L-shaped lamp, and do not use the sliding method.

As described above, by fixing the bottom chassis rotatably to the mold frame, the bottom chassis can be easily opened from the mold frame to remove and replace the lamp.

Although described with reference to the embodiments above, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the invention as set forth in the claims below. Could be.

As described above, according to the present invention, the bottom chassis can be hinged to the mold frame to open the bottom chassis from the mold frame.

As a result, when the lamp needs to be replaced due to the end of its life, the lamp can be easily removed from the mold frame and replaced.

Claims (6)

Light generating means for generating light; A first accommodating container having four sidewalls for accommodating the light generating means and having a plurality of first protrusions on one of the sidewalls; A bottom surface having four edges, three side walls each extending from three edges of the bottom surface, and a second protrusion projecting from one edge of the bottom surface, wherein the second protrusion and the first protrusion are provided. The backlight assembly having a second storage container which is fixed to the first storage container by fastening with the protrusion, and which can be opened and closed by rotating based on the fastened first and second protrusions. The method of claim 1, wherein the first protrusion is formed with a first fastening hole penetrating the first protrusion in a direction parallel to the side wall of the first storage container, the second protrusion is corresponding to the first fastening hole A second fastening hole penetrating a second protrusion is formed, and the first protrusion and the second protrusion are coupled by a first connection member penetrating the first fastening hole and the second fastening hole. assembly. 3. The method of claim 2, wherein the first protrusions are provided in pairs and spaced apart by a predetermined interval, and the second protrusions are inserted between the spaced intervals of the first protrusion and coupled by the first connection member. Backlight assembly. 3. The method of claim 2, wherein the second protrusions are provided in pairs and spaced apart by a predetermined interval, and the first protrusions are inserted between the spaced intervals of the second protrusion and coupled by the first connection member. Backlight assembly. Light generating means for generating light; A first accommodating container having four sidewalls to accommodate the light generating means and having coupling grooves formed at edges of the sidewalls facing each other; And A bottom surface having four edges, and three sidewalls extending from three edges of the bottom surface, and sidewalls facing each other are respectively provided with coupling portions to correspond to the coupling grooves. And a second storage container which is fixed to the first storage container through the coupling groove, and which can be opened and closed by rotating based on the coupled coupling portion and the coupling groove. The method of claim 5, wherein the coupling groove is formed with a third fastening hole, the coupling portion is formed with a fourth fastening hole corresponding to the third fastening hole, penetrating the fourth fastening hole to be coupled to the third fastening hole The second assembly is fixed to the first housing by the second connecting member to the backlight assembly, characterized in that the rotation.

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