KR20060074332A - Receiving unit, backlight assembly and display device having the same - Google Patents

Abstract

Disclosed is a backlight assembly and a display device having a diffuser plate supporting member integrally formed. The plurality of side walls extend at the edge of the bottom plate to define a certain receiving space. The diffusion plate support member is integrally formed to protrude on the front surface of the bottom plate to support the diffusion plate accommodated therein. Accordingly, by integrally forming the diffusion plate support member in the bottom mold, the mold cost, material cost, assembly time, etc. required to separately provide the diffusion plate support member can be reduced, and manufacturing cost can be reduced.

Description

Storage container, backlight assembly and display device having the same {RECEIVING UNIT, BACKLIGHT ASSEMBLY AND DISPLAY DEVICE HAVING THE SAME}

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

FIG. 2 is a front perspective view of the bottom mold shown in FIG. 1.

3 is a rear perspective view of the bottom mold illustrated in FIG. 1.

4 is a cross-sectional view of the bottom mold illustrated in FIG. 2 taken along a cutting line II ′.

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

100: display unit 110: liquid crystal panel

120, 130: driving PCB 200: backlight unit

210: lamp 220: lamp reflector

230: diffuser 240: middle mold

250, 450: bottom mold 251b, 251c: rib

260: upper mold 270: control PCB

400: top chassis 451c: diffusion plate support member

The present invention relates to a storage container, a backlight assembly and a display device having the same, and more particularly, to a storage container having an integrally formed diffusion plate support member, and a backlight assembly and a display device having the same.

Currently, the backlight assembly employed in the LCD-TV consists of a lamp assembly and various optical sheets on a metal bottom chassis.

However, since the bottom chassis is made of galvanized steel or aluminum, parts can be assembled by screw fastening, hook check, or the like, thereby eliminating or integrating each part.

This has fundamental limitations in terms of cost reduction, parts reduction, and assembly time reduction through parts deletion and integration. Because, as long as the bottom chassis is made of metal, there is a problem in that it is difficult to delete any further parts because it is no longer possible to merge with the parts assembled thereon.

Accordingly, the technical problem of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a storage container having a diffusion plate support member integrally formed.

Another object of the present invention is to provide a backlight assembly having the storage container described above.

Another object of the present invention is to provide a display device having the storage container described above.

In order to achieve the above object of the present invention, a storage container according to an embodiment includes a bottom plate, a plurality of sidewalls, and a diffusion plate support member. The plurality of side walls extend from the edge of the bottom plate to define a certain receiving space. The diffusion plate support member is integrally formed to protrude on the front surface of the bottom plate to support the diffusion plate accommodated therein.

In order to achieve the above object of the present invention, a backlight assembly according to an embodiment includes a lamp, a diffusion plate, and a storage container. The lamp emits light. The diffusion plate is emitted by improving the characteristics of the light emitted from the lamp. The storage container includes a bottom surface, a plurality of side walls connected to the bottom surface, a plurality of diffusion plate support members integrally formed on the bottom portion, and an accommodation space defined by the bottom surface and the plurality of side walls. The lamp is accommodated in and supports the diffusion plate through the diffusion plate support members.

In accordance with another aspect of the present invention, a display device includes a backlight assembly and a display panel. The backlight assembly accommodates the lamp in an accommodation space defined by a lamp, a diffusion plate that emits light by improving characteristics of light emitted from the lamp, and a bottom surface and a plurality of sidewalls connected to the bottom surface. And a storage container for supporting the diffuser plate through a plurality of diffuser plate support members formed integrally with the floating portion. The display panel is disposed on the backlight assembly to display an image using light provided from the diffusion plate.

According to such a backlight assembly and a display device, by forming the diffusion plate support member integrally in the bottom mold, it is possible to reduce the mold cost, material cost, assembly time, etc. required to separately provide the diffusion plate support member, thereby reducing the manufacturing cost. have.

Hereinafter, with reference to the accompanying drawings, it will be described in detail the present invention.

1 is an exploded perspective view of a liquid crystal display according to an exemplary embodiment of the present invention. In particular, FIG. 1 is an exploded perspective view of a liquid crystal display device having a direct type lamp unit.

Referring to FIG. 1, a liquid crystal display device displays a display unit 100 for displaying a video signal having an electrical shape by visually adjusting the amount of light transmitted through a liquid crystal, and provides light to the display unit 100. It consists of a backlight unit 200 for.

The display unit 100 includes a liquid crystal panel 110 for displaying an image using liquid crystal, driving PCBs 120 and 130 for applying a driving signal to the liquid crystal panel 110, and the liquid crystal panel 110. ) And the driving PCBs 120 and 130 are electrically connected to each other, thereby reducing the planar area of the liquid crystal display.

Specifically, the driving PCB (120, 130) is composed of a data PCB 120 attached to the data line side of the liquid crystal panel 110, and a gate PCB 130 attached to the gate line side, TCP diagram It is composed of a data side TCP 140 and a gate side TCP 150.

The liquid crystal panel 110 implements a screen, and includes a thin film transistor (TFT) substrate 111, a color filter substrate 113 facing the TFT substrate 111, and the TFT substrate ( And liquid crystal (not shown) injected between the color filter substrate 113 and the color filter substrate 113. The TFT substrate 111 is a substrate referred to as an array substrate and is a transparent glass substrate on which a switching element TFT (not shown) is formed in a matrix form. Data and gate lines are respectively connected to the source and gate terminals of the TFTs, and a pixel electrode made of indium tin oxide (ITO), which is a transparent conductive material, is formed at the drain terminal.

The color filter substrate 113 is a substrate formed by a thin film process by forming a black matrix layer formed between an RGB pixel, which is a color pixel expressed in a predetermined color by light passing through, and each pixel of RGB, to increase contrast. . The common electrode made of ITO is coated on the front surface of the color filter substrate 113.

The data line formed on the liquid crystal panel 110 is electrically connected to the data PCB 120 through the data side TCP 140, and the gate line is connected to the gate PCB 130 through a gate side TCP 150. Is electrically connected to the Accordingly, the data and gate PCBs 120 and 130 that receive electrical signals from the outside transmit the drive and timing signals for controlling the driving and timing of the display unit 100. Are transmitted to the gate line and the data line provided in the TFT substrate 111 of the liquid crystal panel.

On the other hand, the backlight unit 200 is one or more lamps for generating light 210, the diffusion is disposed above the lamp 210 to diffuse the light so as to have a uniform luminance distribution provided from the lamp 210 A plate 230 and a lamp reflector 220 disposed below the lamp 210 to reflect light provided from the lamp 210 to the diffuser plate 230.                     

The lamp 210, the lamp reflector 220, and the diffuser 230 are accommodated in the storage container to be protected and fixed from an external impact. The storage container includes a middle mold 240, a bottom mold 250, and an upper mold 260. The middle mold 240, the bottom mold 250, and the upper mold 260 are made of an injection moldable material and manufactured by an injection molding machine.

The middle mold 240 accommodates the lamps 210 and fixes the lamps 210 at a designated position. The diffusion plate 230 is seated on the step 241 formed on the middle mold 240.

The bottom mold 250 is made of an injection moldable material manufactured by an injection molding machine, and accommodates a lamp reflector 220, a plurality of lamps 210, and a middle mold 240. The bottom mold 250 is preferably made of polycarbonate (PC, Polycarbonate). This is because the polycarbonate is a material having excellent mechanical reliability such as injection moldability, thermal durability and impact reliability.

Diffusion plate support members 251a supporting the diffusion plate 230 are integrally formed on the front surface of the bottom mold 250. The diffusion plate support members 251a are formed of a conical boss to support the diffusion plate 230 to be seated. Of course, the diffusion plate support member may be a variety of shapes, such as pyramidal shape, hexahedral shape, triangular pyramid shape.

Holes 222 are formed in the reflector plate 220 to correspond to the diffusion plate support members 251a.                     

A control PCB 270 connected to the data PCB 120 through the FPCB 121 is disposed on the bottom of the bottom mold 250. The FPCB 121 is inserted into a connector (not shown) provided in the control PCB 270 to receive a signal for driving the liquid crystal panel 110 from the control PCB 270 and the data PCB 120. To feed.

In FIG. 1, an illustration of a substrate cover that is fastened to the bottom mold 250 while covering the control PCB 270 is omitted to prevent impurities introduced from the outside from adversely affecting the control PCB 270.

An upper mold 260 is provided on the diffusion plate 230. The upper mold 260 is interviewed with the diffusion plate 230 and fixed while pressing the diffusion plate 230 toward the middle mold 240. In addition, the liquid crystal panel 110 is seated on the upper mold 260. In this case, the data PCB 120 connected to the liquid crystal panel 110 may be disposed on the sidewall of the bottom mold 250 or may be disposed on the bottom surface of the bottom mold 250.

The gate PCB 130 may be disposed on the sidewall of the bottom mold 250 or may be disposed on the bottom surface of the bottom mold 250.

Subsequently, in order to prevent the display unit 100 seated on the diffusion plate 230 from being separated from the outside, the upper chassis 400 having the upper and lower surfaces of the upper and lower surfaces of the liquid crystal panel 110 may be opened. Is provided. The top chassis 400 presses the periphery of the liquid crystal panel 110 and fixes the liquid crystal panel 110 to the bottom mold 250 through engagement with the bottom mold 250.                     

As described above, the backlight chassis and the manufacturing cost of the liquid crystal display device are formed by integrally forming a boss, which is a diffusion plate support member for supporting the diffusion plate, while changing the bottom chassis, which is generally made of metal, to the bottom mold, which is an injection molding. Can reduce weight.

<Example-1 of the bottom mold>

FIG. 2 is a front perspective view of the bottom mold shown in FIG. 1. 3 is a rear perspective view of the bottom mold illustrated in FIG. 1.

1 to 3, the bottom mold 250 according to the embodiment of the present invention is a bottom plate 251 and a diffuser plate supporting member 251a protruding in the + z-axis direction from the front surface of the reflecting plate 251. ), First, second, third and fourth sidewalls 252, 253, 254, and 255 extending from the bottom plate 251 and protruding in the + z-axis direction to define a predetermined storage space; The first and second ribs 251b and 251c are formed on the rear surface of the bottom plate 251 to protrude in the -z-axis direction to reinforce the bending strength of the bottom plate 251.

The first sidewall 252 extends from the first edge of the bottom plate 251 and protrudes in the + z-axis direction. The first sidewall 252 includes protrusions 252a protruding in the -x-axis direction. A plurality of holes 252b in which an edge area of the bottom plate 251 is opened are formed between the protrusions 252a adjacent to each other. The plurality of holes 252b may receive a lamp holder that covers the end of the lamp in the future.

The second sidewall 253 is connected to one side of the first sidewall 252, extends from the second edge of the bottom plate, and protrudes in the + z-axis direction. A plurality of holes 253a are formed in the second sidewall 253. The plurality of holes 253a are fastened to the middle mold 240 in the future.

The third sidewall 254 is connected to one side of the second sidewall 253, extends from the third edge of the bottom plate 251, and protrudes in the + z-axis direction. The third sidewall 254 includes protrusions 254a that protrude in the + x-axis direction. A plurality of holes 254b in which the edge region of the bottom plate 251 is opened between the protrusions 254a adjacent to each other are formed. The lamp holder is stored in the plurality of holes 254b in the future.

The fourth sidewall 255 is connected to the other side of the first sidewall 252 and the other side of the third sidewall 254, respectively, and extends from the fourth edge of the bottom plate 251 to have a + z-axis. Protrude in the direction. A plurality of holes 255a are formed in the fourth sidewall 255. The plurality of holes 255a are fastened to the middle mold 240 in the future.

A plurality of first ribs 251 b are formed on the rear surface of the bottom plate 251 in parallel with the first side walls 252 and the third side walls 254 to reinforce the bending strength in the y-axis direction.

A plurality of second ribs 251c are formed on the rear surface of the bottom plate 251 in parallel with the second sidewall 253 and the fourth sidewall 255 to reinforce the bending strength in the x-axis direction.

In the above description, the first and second ribs 251b and 251c are formed on the bottom surface of the bottom plate 251 to reinforce the bending strength of the bottom plate 251. However, the bottom mold 250 of FIG. The first rib 251b may be omitted, the second rib 251c may be omitted, and the first and second ribs 251b and 251c may be omitted.

<Example-1 of the bottom mold>                     

4 is a cross-sectional view of the bottom mold illustrated in FIG. 2 taken along a cutting line II ′. In particular, a bottom mold having a diffusion plate support member 251a formed on the front surface of the bottom plate is shown.

Referring to FIG. 4, diffuser plate supporting members 251a are formed on the front surface of the bottom plate 251 to protrude in the + z-axis direction to support the diffuser plate. The diffusion plate support member 251a has a conical shape, and supports the diffusion plate to be seated.

The first sidewall 252 extending from the edge of the bottom plate 251 is connected to the first member 252c protruding in the + z-axis direction and connected to the first member 252c in the + x-axis direction. And a second member 252d that protrudes, and a third member 252e that protrudes in the -z-axis direction while being connected to the second member 252d. In FIG. 4, the first member 252c protrudes from the bottom plate 251 at an angle of 90 degrees. However, the first member 252c may protrude at an acute angle smaller than 90 degrees.

The second sidewall 253 extending from the edge of the bottom plate 251 is connected to the fourth member 253b protruding in the + z-axis direction and connected to the fourth member 253b in the -y-axis direction. And a fifth member 253c that protrudes, and a sixth member 253d that protrudes in the -z-axis direction while being connected to the fifth member 253c. The fifth member 253c is provided with a plurality of holes 253a for fastening with the middle mold 240 in the future. In FIG. 4, the fourth member 253b protrudes at an angle of 90 degrees from the bottom plate 251, but may protrude at an acute angle smaller than 90 degrees.

A rear surface of the bottom plate 251 extends in the x-axis direction in parallel with the second sidewall 253 and a first rib 251b extending in the y-axis direction in parallel with the first sidewall 252. Second rib 251c is formed.

As described above, according to the present invention by implementing a bottom mold having a diffuser plate supporting member integrally formed of a relatively inexpensive material compared to the metal material, the mold cost, material cost, assembly time required to separately provide a diffuser plate support member Etc., the manufacturing cost can be reduced.

In addition, although the light leakage phenomenon occurred in the rear surface through the fastening of the diffusion plate support member and the bottom chassis, according to the present invention, the light leakage phenomenon may be blocked because the diffusion plate support member is integrally formed in the bottom mold.

In addition, the bottom mold may be made of a material that is relatively lighter than that of the metal material, thereby reducing the weight of the backlight assembly and the weight of the liquid crystal display device employing the backlight assembly.

In addition, since the material is injection-molded, compared to the metal material, rattle noise generated after the backlight assembly is fastened can be reduced.

Although described above with reference to the embodiments, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below. I can understand.

Claims (9)

Bottom plate; A plurality of side walls extending from an edge of the bottom plate to define a certain receiving space; And And a diffuser plate supporting member integrally formed to protrude on the front surface of the bottom plate to support the diffuser plate to be received. The storage container of claim 1, wherein the bottom plate, the sidewalls, and the diffusion plate support member are made of a plastic material. The storage container of claim 1, wherein the bottom plate, the sidewalls, and the diffusion plate support member are made of a polycarbonate material. The storage container according to claim 1, wherein the diffusion plate support member has a conical shape. The storage container according to claim 1, further comprising a strength reinforcing portion formed on a rear surface of the bottom plate to reinforce the bending strength of the bottom plate. A lamp for emitting light; A diffusion plate which emits light by improving characteristics of light emitted from the lamp; And The lamp includes a bottom surface, a plurality of side walls connected to the bottom surface, and a plurality of diffusion plate support members integrally formed on the bottom portion, and the lamp is placed in an accommodation space defined by the bottom surface and the plurality of side walls. And a storage container accommodating and supporting the diffuser plate through the diffuser plate supporting members. The backlight assembly of claim 6, wherein the storage container is made of a material capable of injection molding. 7. The optical unit of claim 6, wherein the optical unit includes a lamp and a lamp holder covering an end of the lamp, And a part of an area where the bottom plate and the side wall meet to open to receive the lamp holder. The lamp is housed in an accommodating space defined by a lamp, a diffuser plate which improves the characteristics of light emitted from the lamp, and emits light, and a bottom surface and a plurality of sidewalls connected to the bottom surface, and integrally on the bottom portion. A backlight assembly including a storage container for supporting the diffusion plate through the plurality of diffusion plate support members formed; And And a display panel disposed on the backlight assembly to display an image by using light provided from the diffusion plate.

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