KR20010019450A - Backlight assembly - Google Patents

Abstract

A plurality of lamps that emit light, a lamp holder inserted at both ends of the lamp to protect the lamp, a lamp reflector which surrounds the lamp and improves the light efficiency, and prevents sagging and maintains a constant gap between the lamps In the lamp unit including the interval holding portion for maintaining the ring-shaped lamp insert portion in the interval holding portion is continuously formed by the number of lamps.

Then, a plurality of lamps can be inserted at one time in one spacing part to reduce the assembly time of the lamp unit, and the lamps can be prevented from being bent by the spacing part because all of the lamps are inserted in one spacing part. This can prevent the luminance from falling.

In addition, when opening a predetermined part of the lamp insertion part, the spacing part can be assembled to the lamp for convenience of creation regardless of the assembly order of the lamp unit, so that the soldering process is easy, and the spacing part can be easily assembled and disassembled, thereby improving workability and product. It can improve the productivity.

Description

Backlight assembly

The present invention relates to a backlight assembly. More particularly, the assembly and brightness of the lamp unit may be improved by improving the structure of the gap holder, which is inserted into a plurality of lamps to prevent the lamp from sagging and maintains a constant gap between the lamps. An improved backlight assembly is provided.

Recently, the liquid crystal display device developed to replace the CRT (Cathode Ray Tube) has the advantages of small size, light weight and low power consumption, so it is not only a monitor of a laptop computer but also a monitor and a large information display device of a desktop computer. Is also used.

Since the liquid crystal display is a light-receiving element that does not emit light, it displays information by reflecting extraneous light passing through the LCD panel, or displays information by installing a separate light source, that is, a backlight assembly, on the back of the LCD panel. have.

Here, the backlight assembly includes a lamp unit for emitting light, a light guide plate for guiding the light emitted from the lamp unit toward the LCD panel, and optical sheets for increasing the luminance of light transmitted from the light guide plate.

The lamp unit includes a lamp used as a light source of a liquid crystal display, a lamp holder inserted at both ends of the lamp to protect the lamp, and a lamp reflector and wire for reflecting light emitted from the lamp to the light guide plate to increase the efficiency of light. It is composed of an inverter electrically connected to the lamp and powering the lamp.

Recently, as the LCD has gradually increased in size, luminance has become an important issue, and a large direct LCD has been developed to improve luminance by installing a plurality of lamps on the lower surface of the diffusion plate.

In addition, at least two or more lamps are disposed in the vertical or horizontal direction on one side and the other side in the width direction of the light guide plate in the vertical or horizontal direction with respect to the luminance, in the case of the edge system for installing the lamp assembly on the side of the light guide plate.

As described above, when at least two lamps are installed on the side of the light guide plate in the edge type liquid crystal display device, the intervals between the lamps may be kept constant, and each lamp may be prevented from sagging due to its own weight as the liquid crystal display becomes larger. A plurality of ring-shaped spacing portions are inserted into the lamps.

Here, the spacing part is formed of a closed rubber and elastic rubber or silicone, and at least two spacing parts are fitted to one lamp, and the spacing part fitted to each lamp is not installed at the same position but installed at different positions. To maintain the same spacing between the lamps.

That is, the spacing between the lamps and the spacing between the lamp and the lamp reflector is maintained by the distance between the inner diameter and the outer diameter of the gap holder.

In the schematic description of the assembly process of the lamp unit configured as described above, at least two or more interval holders having substantially the same diameter and inner diameter of the lamp may be inserted into each lamp, and then the lamp holder may be inserted into one end and the other end of the lamps.

Then, to electrically connect the electrodes and wires formed at both ends of the lamp, the lamp is moved left and right to expose the electrodes formed at both ends of the lamp to the outside of the lamp holder and solder the electrodes and wires to the lamp and the lamp holder. Combine the lamp reflector to the outside of the.

However, it takes a lot of time to insert the interval holders, which are almost the same in diameter and inner diameter, for each lamp, and there is a difficulty due to the gap holders that are pre-inserted when the lamps are moved to the left and right in order to proceed with the soldering process. There is a problem in that workability and productivity are reduced.

In addition, the spacing part may maintain the spacing between the lamps and the spacing between the lamp and the lamp reflector constantly by supporting the lamp and the lamp reflector facing the outer circumferential surface, but the lamp may be bent in a predetermined direction by the elastic force of the spacing part so that the brightness may be increased. There is a problem of deterioration.

Accordingly, an object of the present invention is to devise in view of the above problems, to facilitate the assembly and disassembly of the lamp unit to improve workability and product productivity.

Another object of the present invention is to prevent the lamps from being bent by the gap holder to increase the brightness of the liquid crystal display.

Still other objects of the present invention will become more apparent from the following detailed description and the accompanying drawings.

1 is a cross-sectional view schematically showing the structure of a liquid crystal display device according to the present invention.

2 is a perspective view showing a lamp unit structure according to an embodiment of the present invention.

Figure 3 is a perspective view showing in detail the interval maintaining in Figure 2;

Figure 4 is a perspective view showing a state in which the lamp is inserted into the interval maintaining portion according to another embodiment of the present invention.

5 is a perspective view showing in detail the interval maintaining portion of FIG.

Lamp unit of the present invention for achieving the above object is provided with at least two lamp units on one side of the light guide plate to emit light, the lamp holder is inserted into both ends of the longitudinal direction of the lamp to protect the lamp The lamp inserts are continuously formed as many as the number of lamps installed on the side of the light guide plate and the lamp reflection plate fitted to the light guide plate by opening one side facing the light guide plate to surround the lamps and the lamp holders. And gap holders inserted into the to prevent the lamps from sagging by their own weight and keeping the gap between the lamps and the gap between the lamp and the lamp reflector constant.

Hereinafter, the structure of the liquid crystal display according to the present invention will be described with reference to FIGS. 1 to 3.

As shown in FIG. 1, the edge type liquid crystal display device 100 is largely penetrated in a rectangular shape from an upper surface to a lower surface, and is fastened to a lower surface of the frame 110 and a frame 110 having an accommodation space. The bottom chassis 120 closing the lower surface of the 110, the reflector plate 130 is installed on the base surface of the storage space closed by the bottom chassis 120 reflects light, the light is installed on the upper surface of the reflector plate 130 Light guide plate 140 for guiding the light guide plate 140 is installed on one side or both sides in the longitudinal direction of the light emitting unit 200, the optical sheet is installed on the upper surface of the light guide plate 140 to improve the brightness of light 150, an LCD panel 160 installed on an upper surface of the frame 110 to display information, and a top chassis 170 that wraps from the edge of the LCD panel 160 to the side of the frame 110.

Hereinafter, only the lamp unit 200 which is directly related to the present invention among the members constituting the liquid crystal display device 100 will be described.

The lamp unit 200 includes a plurality of lamps 210 and 220 that emit light by forming hot electrodes 211 and 221 (see FIG. 3) at one end and cold electrodes 213 and 223 at the other end thereof. Two lamp holders 230 and 235 which are inserted at both ends of the 210 and 220 to protect the electrodes of the lamps 210 and 220, and the side surfaces of the lamps 210 and 220 which are opposite to the light guide plate 140 are opened to extend to the longitudinal side of the light guide plate 140. The lamps are mounted on the lamp reflector 240, the inverter 250 (220) and the lamps 210 and 220 electrically connected to the lamps 210 and 220 by the wire 250 (see FIG. 2) to apply power. The gap between the lamps 210 and 220 and the lamp reflector 240 maintains a constant gap and prevents the lamps 210 and 220 from sagging is composed of a gap holding unit 260.

Here, two or three lamps 210 and 220 are installed at one side and the other side in the width direction of the light guide plate 140, and they are arranged in a vertical or horizontal direction with respect to the light guide plate 140.

For convenience of description, hereinafter, two lamps 210 and 220 are arranged in a vertical direction as an example, and a lamp adjacent to the optical sheet 150 is referred to as a "first lamp 210", and the reflective sheet 130 and The adjacent lamp is called "second lamp 220".

Meanwhile, according to the present invention, two or more lamps 210 and 220 arranged vertically may be inserted into one gap holder 260, and one lamp holder 261 and 262 may have ring-shaped lamp inserts 261 and 262. Is continuously formed by the number of lamps 210 and 220, the interval maintaining part 260 has a cross-sectional shape of “８” as shown in FIGS. 4 and 5.

Alternatively, as shown in FIGS. 2 and 3, predetermined portions of the lamp inserts 261 and 262 are opened to facilitate assembly and disassembly, so that the cross section of the gap holder 260 is “3” shaped.

Preferably, the spacing part 260 is formed of transparent and elastic silicone or rubber to minimize luminance deviation and prevent the lamp 210 and 220 from being easily removed from the spacing part 260.

The assembly process of the lamp unit configured as described above will be described with reference to FIGS. 2 and 3.

First, as shown in FIG. 2, the lamp holders 230 and 235 are inserted into one end and the other end of the first and second lamps 210 and 220 such that the first lamp 210 and the second lamp 220 are perpendicular to each other.

Subsequently, the first lamp 210 and the second lamp 220 are moved to the left to expose a predetermined portion of the hot electrodes 211 and 221 to the outside of the lamp holder 230 to expose the hot electrodes 211 and 221 and the wire 251. After soldering, the first lamp 210 and the second lamp 220 are moved to the right to expose a predetermined portion of the cold electrodes 213 and 223 to the outside of the lamp holder 235, thereby allowing the wire 253 and the cold electrodes 213 and 223 to be exposed. Solder

Subsequently, the first lamp 210 and the second lamp 220 arranged in the vertical direction are prevented from bending toward the reflective sheet 130 by their own weight, while the upper surface of the lamp reflector 240 and the first lamp 210 are prevented. ), The distance between the first lamp 210 and the second lamp 220 and the distance between the second lamp 220 and the lower surface of the lamp reflector 240 to maintain a constant At least two or more gap holders 260 are inserted into the 210 and the second lamp 220.

That is, the gap maintaining part 260 is positioned to face the first and second lamps 210 and 220 with the openings of the lamp insertion parts 261 and 262 facing the first and second lamps 210 and 220. 2), the two lamp inserts 261 and 262 are pushed into the first lamp 210 and the second lamp 220 to widen the opened portion, and the outer peripheral surfaces of the first lamp 210 and the second lamp 220 are pushed. Each will be wrapped.

Here, since the first lamp 210 and the second lamp 220 are sandwiched and supported by one gap holder 260, the lamps 210 and 220 are prevented from being bent by the elastic force (the pushing action) of the gap holder. When the lamp insertion parts 261 and 262 are formed at equal intervals, the component number of the gap maintaining part 260 is determined, so that the gap between the first surface of the lamp reflector 240 and the first lamp 210 is determined. It is advantageous to control the spacing between the lamp 210 and the second lamp 220 and the spacing between the second lamp 220 and the lower surface of the lamp reflector 240 equally.

In addition, a plurality of lamp inserts 261 and 262 are formed in the gap holder 260 so that two or more lamps 210 and 220 may be inserted into one gap holder 260 at a time. The predetermined portion of the opening is easy to assemble and disassemble the spacer 260.

Meanwhile, as shown in FIG. 2, when the at least two or more interval maintaining parts 260 are inserted into the first lamp 210 and the second lamp 220 by being spaced apart from each other by a predetermined distance, the first lamp 210 and the first lamp 210 are formed. The lamp reflector 240 is fastened to surround the outside of the two lamps 220, the at least two gap holders 260, and the lamp holders 230 and 235.

According to the present invention, when the lamp inserts 261 and 262 are formed in a closed shape as shown in 3b, before fitting the lamp holders 230 and 235 to both ends of the first and second lamps 210 and 220 as in the prior art, The spacer 260 should be inserted into the first and second lamps 210 and 220.

However, as shown in 2b, when the lamp insertion parts 261 and 262 are opened, the interval maintaining part 260 may be assembled as convenient for assembling work regardless of the assembling order. That is, before the lamp holders 230 and 235 are inserted into both ends of the first and second lamps 210 and 220, the gap holder 260 may be assembled to the first and second lamps 210 and 220, or as described above. And assembling the gap holder 260 after the lamp holders 230 and 235 are inserted at both ends of the second lamps 210 and 220, or the lamp reflector 240 is connected to the lamp holders 230 and 235 and the first and second lamps. After coupling to the 210 and 220, the spacer 260 may be inserted into the first and second lamps 210 and 220.

As described above, in the present invention, when the ring-shaped lamp inserting portion is continuously formed by the number of lamps and inserted into the plurality of lamps, the plurality of lamps may be inserted at one interval maintaining portion at a time in the interval holding portion. Assembly time is reduced.

In addition, since a plurality of lamps are all inserted into one gap maintaining portion, the lamps can be prevented from being bent by the gap maintaining portion, so that the brightness of the liquid crystal display can be improved, and the gap between the upper surface of the lamp reflector and the lamp is prevented. There is an advantageous effect in controlling the distance between the lamps and the distance between the lamp and the lower surface of the lamp reflector.

In addition, when opening a predetermined part of the lamp insertion part, the spacing part can be assembled to the lamp for convenience of creation regardless of the assembly order of the lamp unit, so that the soldering process is easy, and the spacing part can be easily assembled and disassembled, thereby improving workability and product. This has the effect of improving the productivity.

Claims (5)

A reflection sheet, a light guide plate and an optical sheet, which are installed in a frame having a storage space and are sequentially installed on the base surface of the storage space to increase the brightness of the light and transmit the light to the LCD panel installed on the upper portion of the frame, and at least one of the light guide plate. In the backlight assembly comprising a lamp unit which is installed on the side of the light emitting unit and the top chassis which is coupled to the frame and wraps from the edge of the LCD panel to the side of the frame, The lamp unit At least two lamps disposed on one side of the light guide plate to emit light; Lamp holders inserted in both longitudinal ends of the lamps to protect the lamps; A lamp reflection plate surrounding the lamps and the lamp holders and having one side facing the light guide plate to be inserted into the light guide plate; And Lamp inserts are continuously formed as many as the number of lamps installed on one side of the light guide plate, and the lamp inserts are fitted to the outer circumferential surface of each of the lamps to prevent the lamps from sagging and the gap between the lamps and the And a gap holder for maintaining a constant gap between the lamp and the lamp reflector. The backlight assembly of claim 1, wherein the lamp inserts are formed at equal intervals. The backlight assembly of claim 2, wherein the lamp inserts have a closed ring shape. The backlight assembly of claim 2, wherein the lamp inserts have a ring shape in which a predetermined portion is opened. The backlight assembly of claim 1, wherein the gap maintaining part is formed of an elastic and transparent material.