KR20060088329A - Back light assembly and display appartus having the back light assembly - Google Patents

Abstract

A backlight assembly and a display device having the same are disclosed. The backlight assembly includes a lamp and a lamp holder. The lamp holder has a lamp fixing groove and a wire lead-out part. The side of the lamp is disposed inside the lamp fixing groove having a slit-shaped opening. The wire lead-out part is formed in the lamp fixing groove to pull the wire from the lamp fixing groove to the outside of the lamp fixing groove. Thus, the assemblability of the backlight assembly is improved.

Backlight assembly, lamp, lamp holder, fixing groove, wire

Description

BACK LIGHT ASSEMBLY AND DISPLAY APPARTUS HAVING THE BACK LIGHT ASSEMBLY}

1 is a perspective view of a backlight assembly according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of the backlight assembly shown in FIG. 1 taken along line II ′. FIG.

3 is a cross-sectional view of the backlight assembly illustrated in FIG. 1 taken along the line II-II ′.

4 is a perspective view of a backlight assembly according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view of the backlight assembly of FIG. 4 taken along line III-III ′. FIG.

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

7 is a perspective view of a backlight assembly according to an embodiment of the present invention.

8 is a cross-sectional view of the backlight assembly of FIG. 7 taken along line IV-IV '.

9 is an exploded perspective view of a backlight assembly according to an embodiment of the present invention.

10 is an exploded perspective view of a display device according to an exemplary embodiment.

FIG. 11 is a partial cross-sectional view of the display device illustrated in FIG. 10 taken along the line V-V.

The present invention relates to a backlight assembly and a display device having the same. More particularly, the present invention relates to a backlight assembly and a display device having the same, which prevents disconnection of a lamp and a wire connected to the lamp and improves assembly thereof.

In general, the liquid crystal has both electrical and optical characteristics that change the transmittance of light according to the intensity of the electric field. Liquid crystal display devices (LCDs) display images by using electro-optical characteristics of liquid crystals (LCs).

Since the liquid crystal is a passive element that cannot generate light by itself, the liquid crystal display includes a backlight assembly to display an image in a dark place.

Cold cathode fluorescent lamps (Cold Cathode Fluorescent Lamp) is mainly used as a light source of the conventional backlight assembly. The backlight assembly employing the cold cathode fluorescent lamp includes a lamp holder in which the end of the lamp is received to protect the electrode portion formed at the end of the lamp and to fix the lamp in a predetermined position on the storage container. The shape of the lamp holder may be variously changed to fix the lamp. However, when the lamp is inserted into the lamp holder and placed in the storage container, the power supply wiring is generally drawn out in a direction substantially perpendicular to the electrode portion of the lamp inserted in the lamp holder.

On the other hand, the power supply wiring is soldered to the electrode portion of the lamp through the hole formed in the lamp holder before being drawn out from the lamp holder. Subsequently, the lamp, the lamp holder and the power supply wiring are assembled by inserting the electrode portion of the lamp into the lamp holder and simultaneously pulling the power supply wiring back. However, in the process of inserting the lamp into the lamp holder, the power supply wiring is greatly bent and a large external force is applied to the power supply wiring. As a result, there is a problem in that the power supply wiring soldered to the electrode portion is frequently disconnected or damaged at the soldered portion.

Accordingly, it is an object of the present invention to substantially eliminate one or more problems and limitations of the prior art.

It is an object of the present invention to provide a backlight assembly with improved assembly and reliability for lamp and wire electrical connections.

Another object of the present invention is to provide a display device having the backlight assembly.

In order to achieve the object of the present invention, the present invention provides a backlight assembly comprising a lamp and a lamp holder. The lamp holder has a lamp fixing groove and a wire lead-out part. The lamp fixing groove receives the end portion of the lamp in a direction substantially perpendicular to the longitudinal direction of the lamp through the slit-shaped inlet. The wire lead-out is connected to the lamp fixing groove to lead the wire out of the lamp fixing groove.

 Preferably, the width of the inlet of the lamp fixing groove is smaller than the diameter of the lamp housed in the lamp fixing groove, the lamp holder comprises an elastic member. Optionally, when the lamp has an odd number of bends, the backlight assembly may further include a fixing member for fixing the bent portion of the lamp.

In the implementation of the present invention, the shape of the lamp fixing groove having a slit-shaped inlet may be changed in various ways. To prevent damage to the lamp and to facilitate the assembly of the lamp and the lamp holder, the material of the lamp holder and the width of the lamp fixing grooves are determined.

According to the present invention, the reliability of the electrical connection between the lamp and the wire is improved, thereby improving the assemblability of the backlight assembly and the display device.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the following embodiments.

Backlight assembly

1 is a perspective view of a backlight assembly according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the backlight assembly shown in FIG. 1 taken along line II ′. FIG.

1 and 2, the backlight assembly 100 according to the present embodiment includes a lamp 110 and a lamp holder 160.

The lamp 110 is, for example, a cold cathode fluorescent lamp and includes a lamp body 113, electrodes (not shown), and a lead wire 111. The lamp body 113 accommodates the discharge gas which generates invisible light by discharge. The inner surface of the lamp body 113 may be formed with a fluorescent layer for converting the invisible light into visible light. The electrodes are disposed at both ends of the lamp body 113 to apply a discharge voltage to the lamp body 113. The lead wire 111 is electrically connected to an electrode disposed inside the lamp 110. In the present embodiment, the backlight assembly 100 includes, for example, two straight lamps 110.

The lamp holder 160 includes a first lamp holder 170 and a second lamp holder 190. The first lamp holder 170 accommodates one end portions of the lamps 110 that face each other in a direction substantially perpendicular to the longitudinal direction of the lamp 110. The second lamp holder 190 is substantially the same as the first lamp holder 170, and accommodates the other ends of the lamps 110 opposite the one ends.

3 is a cross-sectional view of the backlight assembly illustrated in FIG. 1 taken along line II-II.

1 to 3, the first lamp holder 170 may have various shapes, for example, a rectangular parallelepiped and a sphere. In this embodiment, the first lamp holder has a rectangular parallelepiped shape. Accordingly, the first lamp holder 170 according to the present embodiment includes a first surface 171 and a second surface 173 opposite to the first surface 171.

The first lamp holder 170 is provided with a lamp fixing groove 130 and a wire drawing part 150 connected to the lamp fixing groove 130.

The lamp fixing groove 130 is formed in the first surface 171 of the first lamp holder 170 to form an accommodation space for accommodating the end of the lamp 110. Specifically, the lamp fixing groove 130 may be formed to a predetermined depth to one side edge of the first surface 171 along the lamp 110 received at a predetermined position of the first surface 171. Here, when looking at the first surface 171, the slit and opened portion is defined as the inlet 131 of the lamp fixing groove 130, the shape of the first lamp fixing groove 130 is a lamp fixing groove ( It is substantially the same as the shape of the inlet 131 of 130.

The shape of the lamp fixing groove 130 may be variously modified according to the connection method of the wire drawing part 150 and the lamp fixing groove 130 to be described later. In this embodiment, the lamp fixing groove 130 has an 'L' shape, and two lamp fixing grooves 130 are formed on the first surface 171 of the first lamp holder 170 to face each other.

In order to prevent the lamp 110 from being separated from the lamp fixing groove 130, the width D1 of the inlet 131 of the lamp fixing groove 130 may correspond to the diameter of the lamp 110 accommodated in the lamp fixing groove 130. Less than D2).

Therefore, in order to prevent damage to the lamp 110 and to facilitate the coupling of the lamp 110 and the first lamp holder 170, the first lamp holder 170 is preferably made of a material having sufficient elasticity. To this end, the first lamp holder 170 may include a rubber. At this time, in order to secure the rigidity (strength) of the first lamp holder 170, it is preferable that the rubber is included only in the periphery of the inlet 131 of the lamp fixing groove 130 of the first lamp holder 170.

The wire lead-out unit 150 provides a passage through which a wire electrically connected to the lead wire 111 of the lamp 110 is drawn out of the first lamp holder 170. The direction in which the wire drawing part 150 is formed with respect to the lamp fixing groove 130 may be variously changed. In this embodiment, the wire drawing part 150 is connected to the lamp fixing groove 130 formed in the first surface 171 and the wire drawing hole 150 penetrated to the second surface 173 of the first lamp holder 170. )to be.

In the backlight assembly 100 according to the present embodiment, the lamp 110 is in a direction substantially perpendicular to the direction of the first surface 171 of the first lamp holder 170, that is, the length direction of the lamp 110. It is inserted into the first lamp holder 170. Therefore, the wire 120 soldered to the lead wire 111 of the lamp 110 is not bent in the longitudinal direction of the lamp 110 while the lamp 110 is inserted into the lamp fixing groove 130. Accordingly, the wire is naturally drawn out to the outside of the first lamp holder through the wire drawing hole without the effect of a large external force on the soldering portion.

For example, the wire 120 is drawn out to the lamp fixing groove 130 through the wire drawing hole 150 of the first lamp holder 170. Thereafter, the lead wire 111 and the wire 120 of the lamp 110 are soldered and electrically connected to each other. Next, the lamp 110 is inserted into the lamp fixing groove 130 in the direction of the first surface 171 of the first lamp holder 170 (the direction substantially perpendicular to the longitudinal direction of the lamp to be stored). At this time, the outer surface of the lamp 110 is in contact with the inlet of the lamp fixing groove 130, but the end of the lamp 110 in which the soldering portion is formed does not cause friction with the lamp fixing groove 130. Therefore, while inserting the lamp 110 into the lamp fixing groove 130, the wire 120 is naturally pushed back into the wire lead-out hole 150. Therefore, the frequency of disconnection and damage occurring at the soldering site is greatly reduced.

4 is a perspective view of a backlight assembly according to an embodiment of the present invention.

Referring to FIG. 4, the backlight assembly 300 according to the present exemplary embodiment includes a lamp 310, a lamp holder 370, and a fixing member 390.

The lamp 310 is substantially the same as the lamp 110 shown in FIG. 1 except for the shape of the lamp 310. In this embodiment, the lamp 310 has a U shape. The lamp holder 370 is substantially the same as the lamp holder 170 shown in FIG. 1. The lamp holder 370 receives ends of the lamp 310, respectively.

FIG. 5 is a cross-sectional view of the backlight assembly of FIG. 4 taken along line III-III. FIG.

4 and 5, the fixing member 390 is substantially the same as the lamp holder 370 except that the shape of the lamp receiving portion 393 and the wire lead-out portion are deleted. The fixing member 390 receives the bent portion 317 of the lamp 310 to protect the bent portion 317 of the lamp 310 and to fix the lamp 310. To this end, the lamp receiving portion 393 having a slit-shaped inlet 331 may be formed in the fixing member 390. The shape of the lamp receiving portion 393 preferably corresponds to the shape of the bent portion 317 of the lamp 310. The width of the inlet 331 of the lamp receiving portion 393 is smaller than the diameter of the bent portion 317 of the lamp 310 inserted into the lamp receiving portion 393.

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

The backlight assembly 500 according to the present exemplary embodiment is substantially the same as the backlight assembly 300 illustrated in FIGS. 4 and 5 except for the shape of the lamp 510 and the shape and number of the fixing members 590.

Referring to FIG. 6, the backlight assembly 500 according to the present exemplary embodiment includes a lamp 510, a lamp holder 570, and a fixing member 590.

In this embodiment, the lamp 510 has a W shape and includes first to third bent portions 516, 517, and 519. The first bent portion 516 is formed near both ends of the lamp 510 and the second and third bent portions 517 and 519 are formed to face each other.

The fixing member 590 is substantially the same as the lamp holder 570 except that the shape of the lamp receiving portion 593 and the wire lead-out portion are omitted. In the present embodiment, the fixing member 590 is formed to be slim in the longitudinal direction of the lamp 510 to receive the second bent portion 517 or the third bent portions 519 of the lamp 510. As a result, the area where the light is blocked by the fixing member 590 is greatly reduced.

The fixing member 590 is formed with a lamp receiving portion 593 having a slit-shaped inlet 591. The width of the inlet 591 of the lamp receiving portion 593 is smaller than the diameters of the second and third bent portions 517 and 519 of the lamp 510 inserted into the lamp receiving portion 593.

7 is a perspective view of a backlight assembly according to an embodiment of the present invention. 8 is a cross-sectional view of the backlight assembly of FIG. 7 taken along line IV-IV.

The backlight assembly 700 according to the present embodiment is substantially the same as the backlight assembly 100 illustrated in FIG. 1 except for the shape of the lamp 710, the number of lamps 710, and the shape of the lamp holder 770. Do. 7 and 8, the backlight assembly 700 according to the present embodiment includes a lamp 710 and a lamp holder 770.

In this embodiment, the lamp 710 has an L shape. The lamp holder 770 is substantially the same as the lamp holder 170 shown in FIG. 1 except for the number of lamp fixing grooves 730. The backlight assembly 700 according to the present embodiment includes two lamp holders 770 corresponding to each end of the lamp 710.

9 is an exploded perspective view of a backlight assembly according to an embodiment of the present invention.

9, the backlight assembly according to the present embodiment includes a lamp, a lamp holder, a fixing member, a storage container, and an optical member. The lamp, lamp holder and fixing member are substantially the same as the lamp, lamp holder and fixing member shown in FIG.

The storage container includes a bottom plate and sidewalls forming a storage space on the bottom plate. The lamp having a U-shape is fixed to the bottom plate through the lamp holder and the fixing member. In this case, a wire drawing hole may be formed in the bottom plate to draw the wire drawn out of the lamp holder to the outside of the backlight assembly through the wire drawing part of the lamp holder.

The backlight assembly according to the present embodiment may further include a side mold covering the lamp holder and the fixing member and supporting the optical member to be described later. The side mold may include a first surface and a second surface which are in contact with the storage container and face each other, and a third surface which connects the first and second surfaces to face the bottom plate of the storage container. The first surface of the side mold may face the side wall of the storage container, and a groove may be formed in the second surface to prevent interference with the lamp, and a step may be formed in the third surface.

The optical member improves the optical characteristics of the light emitted from the lamp and exits to the outside of the storage container. The optical member is disposed on a step formed in the third surface of the side mold and spaced apart from the lamp by a predetermined distance. The optical member may include a diffuser plate, light collecting sheets, and a protective sheet.

The diffusion plate diffuses the light emitted from the lamp to further improve the brightness uniformity of the light. The light collecting sheets are disposed on the diffuser plate to further improve the front luminance of the light emitted from the diffuser plate. The protective sheet is disposed on the light collecting sheets to protect the light collecting sheets from scratches, heat, and the like.

Display device

10 is an exploded perspective view of a display device according to an exemplary embodiment.

FIG. 11 is a partial cross-sectional view of the display device illustrated in FIG. 10 taken along the line V-V.

10 and 11, the display device according to the present embodiment includes a backlight assembly and a display unit. In the present embodiment, the backlight assembly includes a lamp, a lamp holder, a fixing member, an optical member, and a container and is substantially the same as the backlight assembly shown in FIG. 9.

The display device according to the present embodiment may further include a middle mold. The middle mold is disposed on the storage container in which the optical member is disposed, and the middle mold is opened to expose the optical member. The middle mold presses the edge of the optical member disposed in the side mold to prevent separation of the optical member from the storage container.

The display unit displays an image based on the light emitted from the optical member. The display unit is disposed on the middle mold. The display unit includes a first substrate, a second substrate, and a liquid crystal layer (not shown).

The first substrate is a transparent glass substrate in which thin film transistors, which are switching elements, are formed in a matrix form. A pixel electrode made of a transparent conductive material is formed on the first substrate.

The second substrate is disposed to face the first substrate at a predetermined interval. The second substrate is a substrate in which an RGB pixel, which is a color pixel expressed in a predetermined color when light passes, is formed by a thin film process. A common electrode made of a transparent conductive material is formed on the front surface of the second substrate to correspond to the pixel electrode formed on the first substrate.

When an electric field is formed between the first substrate and the second substrate, the arrangement of the liquid crystal layer interposed between the first substrate and the second substrate is changed, and the transmittance of light supplied from the lamp is changed in accordance with the arrangement change of the liquid crystal display. You get an image of the desired gradation.

The display device according to the present exemplary embodiment may further include a top chassis facing the storage container and fastened to the storage container or the middle mold. The top chassis covers the edges of the display unit to open the effective display area of the display unit.

According to the present invention as described in detail above, the lamp is accommodated in the lamp fixing groove through the slit-shaped inlet in a direction substantially perpendicular to the longitudinal direction of the lamp. Therefore, the wire soldered to the lead of the lamp is not bent in the longitudinal direction of the lamp while the lamp is inserted into the lamp holder. Therefore, the wire is naturally drawn out of the lamp holder through the wire lead-out hole in the soldered state.

Accordingly, the effect of the external force on the soldering site is greatly reduced, and the frequency of disconnection or damage of the wire at the soldering site is significantly reduced. As a result, the assemblability of the backlight assembly and the display device is improved and the reliability of the electrical connection between the lamp and the wire is improved.

In the detailed description of the present invention described above with reference to the preferred embodiments of the present invention, those skilled in the art or those skilled in the art having ordinary skill in the art will be described in the claims to be described later It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

Claims (8)

lamp; And A lamp fixing groove accommodating an end of the lamp in a direction substantially perpendicular to the longitudinal direction of the lamp through a slit-shaped inlet, and connected to the lamp fixing groove for drawing wires out of the lamp fixing groove; And a lamp holder having a wire lead portion formed therein. The method of claim 1, wherein the lamp fixing groove is formed to a predetermined depth from the surface of the lamp holder toward the inside, the width of the slit-shaped inlet formed on the surface is the diameter of the lamp accommodated in the lamp fixing groove A backlight assembly, characterized in that smaller. The backlight assembly of claim 1, wherein the lamp fixing groove has an L shape when viewed based on a direction in which the lamp is accommodated in the lamp holder. The backlight assembly of claim 1, wherein the lamp holder comprises an elastic member. The fixing member of claim 1, wherein the lamp has an odd number of bending portions, and the backlight assembly has a lamp receiving portion configured to receive the bending portion in a direction substantially perpendicular to the longitudinal direction of the lamp through a slit-shaped inlet. The backlight assembly further comprises. The storage container of claim 1, wherein the backlight assembly comprises a bottom plate on which the lamp fixed to the lamp holder is disposed, and a side wall disposed at a periphery of the bottom plate to form a storage space. And an optical member disposed in the storage space and configured to improve the optical characteristics of the light incident from the lamp. A lamp fixing groove for accommodating the end of the lamp in a direction substantially perpendicular to the longitudinal direction of the lamp through the lamp and the slit-shaped inlet and to the lamp fixing groove to pull out the wire to the outside of the lamp fixing groove. An optical unit including a lamp holder having a wire lead portion connected thereto; And And a display unit for displaying an image based on the light provided from the optical unit. 8. The fixed lamp according to claim 7, wherein the lamp has an odd number of bending portions, and the optical unit has a lamp receiving portion for receiving the bending portion in a direction substantially perpendicular to the longitudinal direction of the lamp through a slit-shaped inlet. Member, an optical member disposed in association with the lamp to improve the optical characteristics of the light emitted from the lamp to provide to the display unit and a storage container for storing the lamp, the lamp holder, the fixing member and the optical member Display device comprising a.

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