KR100644808B1 - Direct lighting type of liquid crystal display - Google Patents

Abstract

Fixing parts are provided at both ends of the lamp, and fastening parts are fastened to one side edge and the other edge in the width direction of the reflecting plate to directly fix the plurality of lamps to the reflecting plate.

Then, when all the lamps installed on the reflector are not turned on, the lamp replacement operation can be improved, the time required for assembling the liquid crystal display device can be reduced, and the weight of the liquid crystal display device can be reduced.

Direct method, lamp, reflector, lamp holder, lamp fixing part, fastening part

Description

Direct lighting type of liquid crystal display}

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

FIG. 2 is an enlarged view illustrating main parts of an enlarged portion A of FIG. 1; FIG.

3 is an exploded perspective view showing the structure of the reflector and the lamp unit according to the first embodiment of the present invention.

4 is a cross-sectional view taken along line IV-IV of FIG. 3.

5 is an exploded perspective view showing the structure of a reflector and a lamp unit according to a second embodiment of the present invention.

6 is an exploded perspective view showing the structure of a reflecting plate and a lamp unit according to a third embodiment of the present invention;

FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. 6. FIG.

8 is an exploded perspective view showing the structure of a reflector and a lamp unit according to a fourth embodiment of the present invention;

FIG. 9 is a cross-sectional view taken along the line VII-VII of FIG. 8. FIG.

10 is an exploded perspective view showing the structure of a reflector and a lamp unit according to a fifth embodiment of the present invention;

The present invention relates to a direct type liquid crystal display device, and more particularly, a direct lamp type in which lamp fixing parts are formed at opposite ends of the reflecting plates, and both ends of the lamps are fitted to each lamp fixing part to fix the lamp to the reflecting plate. It relates to a liquid crystal display device.

CRT (Cathode Ray Tube), one of the commonly used display devices, is mainly used for monitors such as TVs, measuring devices, information terminal devices, etc., but due to the weight and size of the CRT itself, Could not respond actively to demands.

In order to replace the CRT, a liquid crystal display device having advantages such as small size, light weight, and low power consumption has been actively developed, and recently, it has been developed enough to perform a role as a flat panel display device. In addition, the demand for the liquid crystal display device is continuously increasing as it is used for a monitor of a desktop computer and a large information display device.

Since most of the liquid crystal display devices are light-receiving devices that display images by controlling the amount of light coming from the outside, a separate light source for illuminating the LCD panel, that is, a backlight assembly, is required. It is divided into edge type and direct type according to the location where the unit is installed.

In the double-edge method, the lamp unit is installed on the side of the light guide plate for guiding the light, and the lamp unit surrounds the lamp that emits light, the lamp holder which is inserted at both ends of the lamp, and protects the lamp, and the one side is It is provided with a lamp reflector plate fitted to the side of the light guide plate to reflect the light emitted from the lamp toward the light guide plate.

The edge method in which the lamp unit is installed on the side of the light guide plate is applied to a relatively small liquid crystal display device such as a monitor of a laptop computer and a desktop computer, and has good uniformity of light, a long service life, and a liquid crystal. It is advantageous to thin the display device.

On the other hand, as the size of the liquid crystal display device began to be enlarged to 20 inches or more, the direct development method began to focus on directly directing the LCD panel by arranging a plurality of lamps on the lower surface of the diffusion plate.

Such a direct type is mainly used for a large screen liquid crystal display device requiring high brightness because the light utilization efficiency is higher than that of the woven type.

However, in the case of the liquid crystal display device adopting the direct method, since many lamps are installed on the lower surface of the diffusion plate, lamps that do not turn on due to the failure and life of the lamp are more likely to appear than the edge method.

In addition, due to the life and failure of the lamp in the edge method in which the lamp unit is installed on both side surfaces in the width direction of the light guide plate, for example, when only one lamp is not turned on, only the brightness on the screen is lowered. However, in the direct method, since lamps are installed on the bottom of the screen, for example, when one lamp does not light up, the part where the lamp does not light up becomes dark due to lamp life and failure. Will appear immediately.

For this reason, since the lamp is frequently replaced in the direct type liquid crystal display device, the direct type liquid crystal display device should have an easy structure for disassembling and assembling the lamp unit.

Therefore, in the conventional direct-type liquid crystal display device, a slide slit is formed on the side surface of the bottom chassis corresponding to the lamp unit to facilitate disassembly and assembly of the lamp unit, and the lamp unit and the reflecting plate are divided into a plurality of longitudinal directions of the diffusion plate. Along the bottom of the diffuser plate. Then, after a predetermined time has elapsed, when a lamp that does not turn on occurs, the operator replaces only the lamp unit in which the lamp that does not turn on is installed to the outside of the liquid crystal display through the slide slit and replaces the lamp.

Here, each lamp unit is coupled to a plurality of lamp holders used for the light source of the liquid crystal display, for example, four lamps, two lamp holders respectively fitted to one end and the other end of the lamps to protect the lamps. It consists of lamp supports that facilitate the replacement of the lamp.

However, in order to assemble the lamp unit configured as described above, lamp holders are inserted at both ends of each lamp, the lamp support is coupled to the upper surface of the lamp holders, the reflector is positioned on the lower surface of the lamp holder, and the respective reflector plates are screwed or Since it is necessary to adhere to each other using adhesive tape, the assembly process is complicated and the assembly time takes a lot, and the productivity of the product is reduced.

In addition, there is a problem in that the weight of the product is increased due to the lamp supports coupled with the respective lamp holders.

In addition, when the lamps installed on the lower surface of the diffusion plate do not light up at the same time, it is cumbersome to take out each lamp unit to the outside of the liquid crystal display and replace new lamps in each lamp unit, and the time required for the operation is long.

Accordingly, an object of the present invention is to conceive in view of the above problems, to simplify the assembly process of the lamp unit to improve the productivity of the product.

Another object of the present invention is to reduce the weight of a liquid crystal display device.

Another object of the present invention is to reduce the time required to replace the lamp when all of the lamps are not lit.

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

In order to achieve the above object, the present invention provides a mold frame in which a storage space is formed, a reflective plate installed on a base surface of the storage space, and having a plurality of fastening portions formed at predetermined widths on one side edge and the other edge in the width direction thereof, and an upper portion of the reflective plate. A plurality of lamps are installed along the longitudinal direction of the reflecting plate and spaced apart from each other on the surface, and electrodes are formed at one end and the other end and are fitted at one end and the other end of the lamps to emit light, and are coupled with the fastening part. A lamp unit including wires electrically connected to the electrodes by the fixing parts and wires for fixing the lamps to the upper surface of the reflector to supply power to the lamps, and installed on the upper surface of the lamps to emit light emitted from the lamps. And a diffusion panel for diffusing and an LCD panel installed on the diffusion plate to display information.

Preferably, the lamp unit further includes a lamp holder fitted to one end and the other end of the lamps to protect the lamps.

For example, the fixing part is a lamp holder, and the fastening part into which the lamp holder is inserted is formed to protrude in a round shape toward a diffuser plate, and a holder insertion hole is formed from one side to the other side opposite to the lamp holder.

As another example, the fixing part is formed in the body, a holder insertion hole through which one side of the body facing the lamp holder and the other side is inserted, and a portion spaced apart from the bottom of the holder insertion hole of the body by a predetermined distance. Consists of a guide slit for guiding the fastening portion, the fastening portion into which the fastening portion is fitted is opposed to a predetermined portion of the edge protrudes a predetermined height toward the diffuser plate and the protruding end is bent vertically with respect to the reflector plate, the bent portion is a guide slit Is fitted on.

As another example, the fixing part is a clip having one side and the other side facing the lamp holder and a lower side facing the reflecting plate and having an elastic force and formed in a shape corresponding to the lamp holder in a portion corresponding to the lamp holder. Is formed on the bottom of the holder insertion portion and the holder insertion portion is inserted into a narrower than the gap between the holder insertion portion and the support portion for supporting the lamp holder and the lower end portion of the support portion is bent to the outside of the clip to be parallel to the reflecting plate fastening portion It consists of a engaging portion coupled to, the fastening portion is coupled to this fixed portion is a slit opened in a predetermined size along the width direction of the reflecting plate to the edge predetermined portion.

Hereinafter, a structure of a direct liquid crystal display device according to the present invention will be described with reference to FIGS. 1 to 10.

As shown in FIG. 1, the direct liquid crystal display device 100 according to the present invention includes a mold frame 110 and a storage space of the mold frame 110 having rectangular storage spaces 113 and 115 formed from an upper surface to a lower surface. Reflector plate 120 is installed on the 113, 115 reflects the light in the upper direction, the lamp unit 140 is installed on the upper surface of the reflecting plate 120 to emit light, the lamp unit is installed on the lamp unit 140 The bottom chassis 170 which is fastened to the diffuser plate 160 for diffusing the light emitted from the 140 and the lower surface of the mold frame 110 to support the reflector plate 120, the lamp unit 140, and the diffuser plate 160. ), An LCD panel 180 installed on an upper surface of the mold frame 110 to display information, and a top chassis 190 wrapped from an edge of the LCD panel 180 to a side surface of the mold frame 110.

Among them, the mold frame 110 has a rectangular shape corresponding to the LCD panel 180, and storage spaces 113 and 115 having a predetermined depth are formed on the upper and lower surfaces thereof, and the storage space is formed on the lower surface side of the mold frame 110. The reflective plate 120, the lamp unit 140, and the diffusion plate 160 are sequentially stacked on the 113.

The LCD panel 180 is accommodated in the storage space 115 formed on the upper surface of the mold frame 110, and the LCD panel 180 is a portion of the LCD panel 180 that is displayed on the base surface of the storage space 115. An open area larger than the screen display area is formed, and light emitted from the diffuser plate 160 is incident on the LCD panel 180.

Lamp units 140 are provided in plurality in the longitudinal direction of the reflector 120 to be spaced apart from each other by a predetermined number of lamps 142 used as a light source of the liquid crystal display device 100 is formed on one end and the other end (not shown) ), Two lamp holders 144 fitted at one end and the other end of the lamps 142 to protect the lamps 142 and wires 147 and 148 are electrically connected to the electrodes of the lamps 142, respectively. Inverters (not shown) for supplying power to the 142 and, in some cases, fixing parts 150 fitted to the respective lamp holders 144 to fix both ends of the lamp 142 to the reflector plate 120. ) Is further included.

Meanwhile, as shown in FIG. 3, the remaining area of the reflective plate 120 except for a predetermined edge portion protrudes toward the diffuser plate 160 by a predetermined height to form the protrusion 122, which forms the wire 148 as a bottom chassis ( This is for pulling out between 170 and the reflecting plate 120. In addition, a wire formed between the bottom chassis 170 and the reflecting plate 120 is formed on the slope of the protrusion 122 and is lower than the protrusion 122 so as to have widthwise edges 124 and 126 of the reflecting plate 120 contacting the bottom chassis 170. A bead 128 is formed to remove the 148, and the bead 128 extends from one side of the edge width direction to the protrusion 122.

According to the present invention, the lamp 142 by fastening the fixing part 150 to one edge 124 and the other edge 126 in the width direction of the reflective plate 120 having the bead 128 formed thereon. Both ends of the fastening portion 130 is fastened to be fixed is formed.

Herein, the fixing parts 150 fitted to both ends of the lamp 142 and the fastening parts 130 into which the fixing parts 150 are fitted will be described in more detail with reference to the first to fourth embodiments. As follows.

In the first embodiment, the fixing unit 150 is not inserted into the lamp holder 144, but the lamp holder 144 itself serves as the fixing unit 150. Therefore, the weight of the liquid crystal display device 100 is reduced compared to the related art.

In addition, the fastening part 130 is formed in a semicircular shape by lifting a predetermined portion of the widthwise one side edge 124 and the other edge 126 of the reflective plate 120 toward the diffusion plate 160, and the protrusion part 122. A holder insertion hole 132 into which the lamp holder 144 is fitted is formed in a direction opposite to the shape of the lamp holder 144.

Referring to the formation process of the fastening unit 130 described above, the predetermined portions of the edges 124 and 126 are spaced apart from each other by a predetermined length toward the longitudinal direction of the reflecting plate 120 to form a cutting line. In order to cut the portion spaced a predetermined distance toward the protrusion 122 in a size corresponding to the first cut line to form another cut line. Then, the portion between the cutting lines is pushed toward the diffuser plate 160 from the lower surface of the reflecting plate 120, thereby making the fastening part 130 in which the holder insertion hole 132 is formed in the direction facing the protrusion 122. .

Preferably, after the lamp holder 144 fitted to both ends of the lamps 142 is fastened to the fastening part 130, the lamps 142 are flowed in the width direction of the reflecting plate 120 to allow the lamps 142 to be moved. In order to prevent the fastening portion 130 from being separated from the lamp holder 144 in the upper surface facing the diffusion plate 160 to form a departure prevention groove 143 to a predetermined depth, the departure prevention groove 143 On the inner side of the fastening portion 130 that faces the boss 133 is fitted into the separation preventing groove 143 is formed.

A process of fixing the lamps 142 to the reflector plate 120 to which the first embodiment is applied is as follows.

First, one end portion and the other end portion of the lamp 142 are inserted into the respective fastening portions 130, and the lamp holder 144 is projected to the outside of the holder insertion hole 132 formed in the fastening portion 130. The lamp holder 144 is inserted into one end and the other end of the lamp 142 by pushing toward the side.

At this time, when the lamp holder 144 is completely introduced into the holder insertion hole 132, the boss 133 is inserted into the separation preventing groove 143 formed in the lamp holder 144, so that the lamp 142 is the reflecting plate 120 Does not fall back in the width direction.

Meanwhile, the wire 148 connected to the cold side of the lamp 120 through which the current is returned is bent to the rear side of the reflecting plate 120, inserted into the bead 128, and then formed on the edge 124 via the protrusion 122. It is inserted into the 128 again and exposed to the outside of the reflector 120.

When fixing the lamp 142 to the reflector plate 120 applied in the first embodiment, the assembly process is simplified compared to the conventional, a special mold for fastening the lamp 142 on the upper part of the lamp holder 144 is fastened Since it is not, the weight of the liquid crystal display device 100 is reduced compared to the related art.

The lamp fixing part 150 according to the second embodiment includes a body 152, a holder insertion hole (not shown) into which the lamp holder 144 is fitted, and a fastening part 130, as shown in FIGS. 2 and 5. It is composed of a guide slit 156 is inserted into the () to secure the lamp 142 to the reflecting plate 120.

Here, the holder insertion hole is formed in a shape corresponding to the lamp holder 144 on the upper end of the body 152 protruding to the upper surface of the protrusion 122 when the fixing portion 122 is inserted into the fastening portion 130 It is formed in the direction opposite to the protrusion 122.

The guide slit 156 is formed by extending a groove of a predetermined depth from the side of the body 152 facing the protrusion 122 to the other side at a lower end of the body 152 spaced apart from the bottom of the holder insertion hole. , The guide slit 156 is formed on each side of the body 152 located in the longitudinal direction of the reflecting plate 120 when the fixing portion 150 is fixed to the fastening portion 130, respectively.

Meanwhile, the fastening part 130 according to the second embodiment guides the fixing part 150 by being inserted into the guide slit 156 and protrudes perpendicularly to the reflecting plate 120 at predetermined portions of the edges 124 and 126 so as to face each other. And the protruding end portion is a "b" shaped bent horizontally with respect to the reflecting plate 120 to face each other.

Referring to the formation process of the fastening unit 130 described above, cutting the predetermined portions of the edges 124 and 126 spaced apart from each other by a predetermined length toward the longitudinal direction of the reflecting plate 120 to form a cutting line, A portion spaced a predetermined distance from the point toward the protrusion 122 is cut to a size corresponding to the first cut line to form another cut line. Then, after cutting to connect the central portion of the other cutting line from one of the cutting line, by pushing the cut portion from the lower surface of the reflecting plate 120 toward the diffuser plate 160 to stand vertically, vertically The end of the portion is bent horizontally with respect to the reflector plate 120 to form a fastening portion 130 of the "a" shape.

Here, the portion 136, which is bent horizontally with respect to the reflector plate 120 of the fastening part 130, is inserted into the guide slit 156 to guide the fixing part 150.

Preferably, after the fixing parts 150 fitted to both ends of the lamps 142 are fastened to the fastening part 130, the lamps 142 are flowed in the width direction of the reflecting plate 120 so that the lamps 142 are fastened. ) Is formed in a predetermined portion of each guide slit 156 to a predetermined depth to prevent the departure from the fastening portion 130, and the bent portion 136 facing the departure preventing groove (136) The inner surface of the boss is formed in the boss 133 is fitted into the separation prevention groove.

A process of fixing the lamp to the reflector to which the second embodiment is applied is as follows.

First, the lamp holder 144 is inserted into one end portion and the other end portion of each lamp 142, and then the lamps 142 are placed on the protrusion 122 of the reflector plate 120 at a predetermined interval from each other. Then, both end portions of the lamp 142 to which the lamp holder 144 is inserted protrude outward of the protrusion 122 and are positioned at positions corresponding to the respective fastening portions 130.

In this state, the fixing part 150 is pushed toward the protruding part 122 from a portion adjacent to the outside of the reflecting plate 120 to be fixed to the fastening part 130. In more detail, by aligning the bent portion 136 of the guide slit 156 and the fastening portion 130 of the fixing part 150 to fit the bent portion 136 in the guide slit 156, The fixing part 150 is pushed toward the protrusion part 122. Then, as the guide slit 156 of the fixing part 150 slides toward the protrusion 122 along the bent part 136 of the fastening part 130, the part where the release preventing groove formed in the guide slit 156 is bent ( The fixing part 150 is no longer slid toward the protrusion 122 by being caught by the boss 133 formed in the 136. Therefore, even when the flow is generated, the lamp 142 is not separated from the fastening part 130 by the release preventing groove and the boss 133.

Meanwhile, the wire 148 connected to the cold side of the lamp 120 through which the current is returned is bent to the rear side of the reflecting plate 120, inserted into the bead 128, and then formed on the edge 124 via the protrusion 122. It is inserted into the 128 again and exposed to the outside of the reflector 120.

6 and 7, the lamp fixing part 150 according to the third embodiment includes a body 152, a holder insertion hole (not shown) into which the lamp holder 144 is fitted, and a fastening part 130. It is composed of a guide slit 156 is inserted into the () to secure the lamp to the reflecting plate (120).

Here, the holder insertion hole is formed in a shape corresponding to the lamp holder 144 on the upper end of the body 152 protruding to the upper surface of the protrusion 122 when the fixing portion 150 is inserted into the fastening portion 130 It is formed in the direction opposite to the protrusion 122.

The guide slit 156 is formed by extending a groove of a predetermined depth from the side of the body 152 facing the protrusion 122 to the other side at a lower end of the body 152 spaced apart from the bottom of the holder insertion hole. The guide slit 156 is formed only on one side of the body 152 facing the fastening part 130.

Meanwhile, the fastening part 130 according to the third embodiment guides the fixing part 150 by being inserted into the guide slit 156 and protrudes perpendicularly to the reflecting plate 120 at predetermined portions of the edges 124 and 126 so as to face each other. And the protruding end portion is a "b" shape bent perpendicularly to the reflecting plate 120 so as to face each other.

Referring to the formation process of the fastening unit 130 described above, cutting the predetermined portions of the edges 124 and 126 spaced apart from each other by a predetermined length toward the width direction of the reflecting plate 120 to form a cutting line, A portion spaced a predetermined distance toward the longitudinal direction of the reflecting plate 120 at the point is cut to a size corresponding to the first cut line to form another cutting line. In addition, after cutting the center portion of one cutting line so that the other cutting line center portion is connected, the portion cut from the lower surface of the reflecting plate 120 is pushed up toward the diffuser plate 160 to stand vertically, vertically The end of the portion is bent horizontally with respect to the reflector plate 120 to form a fastening portion 130 of the "a" shape.

Here, the portion 136, which is bent horizontally with respect to the reflector plate 120 of the fastening part 130, is inserted into the guide slit 156 to guide the fixing part 150.

Preferably, after the fixing parts 150 fitted to both ends of the lamps 142 are fastened to the fastening part 130, the lamps 142 are flowed in the width direction of the reflecting plate 120 so that the lamps 142 are fastened. ) Is formed in the predetermined portion of the guide slit 156 to a predetermined depth in order to prevent the separation from the fastening portion 130, and the inner side of the bent portion 136 facing the departure prevention groove The boss 133 fitted in the prevention groove is formed.

A process of fixing the lamp to the reflector to which the third embodiment is applied is as follows.

First, the lamp holder 144 is inserted into one end and the other end of each lamp 142, and each lamp holder 144 is inserted into the holder insertion hole of the fixing part 150.

Then, the lamps 142 are placed on the upper surface of the protrusion 122, and the guide slit 156 of the fixing part 150 is aligned with the bent portion 136 of the fastening part 130. The government 150 is pushed toward the longitudinal direction of the reflector 120 to couple the fixing part 150 to the fastening part 130. At this time, the guide slit 156 of the fixing part 150 slides toward the fastening part 130 along the bent part 136 of the fastening part 130, and the departure prevention groove formed in the guide slit 156 is bent part. The fixing part 150 is no longer slid toward the longitudinal direction of the reflecting plate 120 by being caught by the boss 133 formed at the 136, and the lamp 142 is prevented from being separated from the fastening part 130.

Meanwhile, the wire 148 connected to the cold side of the lamp 120 through which the current is returned is bent to the rear side of the reflecting plate 120, inserted into the bead 128, and then formed on the edge 124 via the protrusion 122. It is inserted into the 128 again and exposed to the outside of the reflector 120.

As shown in FIGS. 8 and 9, the fixing part 150 according to the fourth embodiment is a clip in which both sides facing the protrusion 122 and the lower surface facing the reflecting plate 120 are opened. If not, the contraction is contracted, but when the lamp holder 144 is fitted to the clip 150, the clip 150 has an elastic force to relax.

As shown in FIG. 8, the lamp holder 144 may be inserted into the upper end of the clip 150 protruding to the upper surface of the protrusion 122 when the clip 150 is inserted into the fastening part 130. A holder inserting portion 154 is provided to support the lower portion of the holder inserting portion 154, and a support portion 157 for supporting the lamp holder 144 is formed, and the support portion 157 is formed of the holder inserting portion 154. It is formed narrower than the interval.

In addition, a lower end of the support part 157 is bent in parallel with the reflecting plate 120 to the outside of the support part 157 and is caught by the lower surface of the reflecting plate 120 when the clip 150 is fitted to the fastening part 130. 158 is formed.

The fastening part 130 is a rectangular through hole corresponding to the fastening part 158. Two fastening parts 130 are formed to face each other and the fastening part 130 is fastened to the fastening part 130 when the clip 150 is contracted by an external force. When the external force is removed, the catching portion 158 is relaxed together with the supporting portion 157 and the catching portion 158 is caught on the lower surface of the reflecting plate 120 as shown in FIG. 9. 120).

A process of fixing the lamp unit to the reflector to which the fourth embodiment is applied is as follows.

First, the lamp holder 144 is fitted to one end and the other end of each lamp 142, and the clip 150 is fitted at the top of the lamp holder 144. Then, the support 157 of the clip 150 is opened by the width of the lamp holder 144 by the pressure pressed from above and the elastic force of the clip 150 itself, the lamp holder to the holder insertion portion 154 of the clip 150 144 is fitted. When the lamp holder 144 is completely inserted into the holder inserting part 154, the support part 157 contracts again to press the outer surface of the lamp holder 144 and to support the lamp holder 144.

At this time, the interval between the support 157 is wider than the state before the lamp holder 144 is fitted to the clip 150 due to the lamp holder 144.

Subsequently, the lamps 142 having the clips 150 inserted at both ends thereof are spaced apart from each other by a predetermined distance and placed on the protrusion 122 of the reflector plate 120. Then, both end portions of the lamp 142 into which the lamp holder 144 is inserted protrude outward of the protrusion 122 to be positioned at positions corresponding to the respective fastening portions 130.

When the lamps 142 are placed on the protrusion 122 of the reflecting plate 120, the interval between the catching portions 158 is applied to each other by applying a force to the support 157 to fix the lamps 142 to the reflecting plate 120. The contracting portion 157 is shrunk so as to be narrower than an interval between the opposite coupling portions 130, and then the locking portion 158 is inserted into the coupling portion 130 to remove external force.

Then, as the support part 157 is relaxed by the elastic force, the gap between the locking parts 130 is wider than the gap between the fastening parts 130, so that the locking part 158 is caught on the lower surface of the reflecting plate 120. 150 is fixed to the reflector plate 120.

Meanwhile, the wire 148 connected to the cold side of the lamp 120 through which the current is returned is bent to the rear side of the reflecting plate 120, inserted into the bead 128, and then formed on the edge 124 via the protrusion 122. It is inserted into the 128 again and exposed to the outside of the reflector 120.

Meanwhile, as illustrated in FIG. 10, a plurality of lamp units 200 according to the fifth embodiment are provided with a predetermined interval spaced apart from each other along the longitudinal direction of the reflector 120, and electrodes 213 and 215 are formed at one end and the other end thereof to form a liquid crystal. A plurality of lamps 210 used as a light source of the display device 100 and one end and the other end of the lamps 210 are respectively connected to the electrodes of the lamps 210 and coupled to the fastening unit 130 to be connected to the lamps 210. ) Is an inverter (not shown) electrically connected to the socket 230 by a socket 230 fixing the reflective plate 120 and wires 247 and 248 to supply power to the lamp 210.

The socket is formed in the body 232, the lamp insertion groove 234 into which the predetermined portion of the end of the lamp 210 is fitted, and the center of the lamp insertion groove 234, so that the electrodes 213 and 215 of the lamp 210 are formed. It is composed of an electrode connecting portion (not shown) to be inserted and connected and a guide slit 236 to be fixed to the reflector plate 120 to the socket 230.

Here, the lamp insertion groove 234 has a shape corresponding to the lamp 210 on one side of the upper end of the body 232 protruding to the upper surface of the protrusion 122 when the socket 230 is inserted into the fastening portion 130 Is formed.

The guide slit 236 is formed at the lower end of the body 232 spaced a predetermined distance from the bottom of the lamp insertion groove 234, the guide slit 236 at the side of the body 232 facing the protrusion 122 The groove of a predetermined depth extends to the other side.

In addition, the fastening part 130 according to the fifth embodiment guides the socket 230 by being inserted into the guide slit 236, and protrudes perpendicularly to the reflector 120 at predetermined portions 124 and 126 so as to face each other. The protruding end portion has a "b" shape that is bent vertically with respect to the reflector plate 120 so as to face each other.

Preferably, after the sockets 230 inserted at both ends of the lamps 210 are fastened to the fastening unit 130, the lamps 210 are flowed in the width direction of the reflector plate 120 so that the lamps 210 may be rotated. In order to prevent the fastening portion 130 from being separated from the guide slit 236, a predetermined depth of the separation prevention groove (not shown) is formed in a predetermined depth, and the bent portion of the bent portion 136 facing the departure prevention groove The inner surface is formed with a boss (not shown) to be fitted in the separation prevention groove.

A process of fixing the lamp unit to the reflector to which the fifth embodiment is applied is as follows.

First, the lamp 210 is placed on the protrusion 122 of the reflector plate 120. Then, both end portions of the lamp 210 protrude outward of the protrusion 122 and are positioned at positions corresponding to the respective fastening portions 130.

In this state, the guide slit 236 of the socket 230 and the bent portion 136 of the fastening portion 130 are aligned to fit the bent portion 136 in the guide slit 236, and then the socket 230 To the protrusion 122. Then, as the guide slit 236 of the socket 230 slides toward the protrusion 122 along the bent portion 136 of the fastening portion 130, the portion 136 where the release preventing groove formed in the guide slit 236 is bent. The socket 230 is no longer slid toward the protrusion 122 by being caught by a boss formed in FIG. Therefore, even if the flow is generated, the lamp 210 is not separated from the fastening portion 130 by the separation preventing groove and the boss. Then, the electrodes 213 and 215 of the lamp 210 are inserted into the electrode connection portion formed at the center of the lamp insertion groove 234 so that the socket 230 and the lamp 210 are electrically connected to each other.

Meanwhile, the wire 248 connected to the cold side of the lamp 210 through which the current is returned is bent to the rear side of the reflecting plate 120, inserted into the bead 128, and then formed on the edge 124 via the protrusion 122. It is inserted into the 128 again and exposed to the outside of the reflector 120.

The assembly process and the lamp replacement operation of the liquid crystal display device according to the present invention configured as described above will be described below.

First, the diffusion plate 160 is installed in the storage space 113 while the mold frame 110 is inverted so that the storage space 113 formed on the lower surface side of the mold frame 110 is exposed to the outside. When the plurality of lamps 142 and 210 are assembled to the upper surface of the reflecting plate 120 through the same process as described in the fifth embodiment, the reflecting plate 120 is installed on the lower surface of the diffusion plate 160. Then, the reflective plate 120 is fixed to the mold frame 110 using a screw.

Thereafter, the bottom chassis 170 is fastened to the lower surface of the mold frame 110, and the mold frame 110 is turned upside down so that the storage space 115 formed on the upper surface side of the mold frame 110 is exposed to the outside. The LCD panel 180 is installed in the storage space 115, and the top panel 190 is covered with the mold frame 110 by covering the top chassis 190 on the upper portion of the LCD panel 180.

In order to replace the lamps 142 and 210 which are not turned on after driving the assembled liquid crystal display device 100 through the above-described process, the bottom chassis 170 is separated from the mold frame 110 and the reflector plate 120 is provided. After removing the screw from)) to separate the reflector plate 120 and the mold frame 110. In order to separate the lamp that is not lit from the reflector 120, the new lamp 142 and 210 are fixed to the reflector 120 after the fixing part 150 or the socket 230 is separated from the fastening part 130. .

When the lamps 142 and 210 are directly fixed to the reflector 120 as described above, when the lamps 142 and 210 are not all lit, the lamps 142 and 210 may be replaced, including the reflector 120. Much advantageous compared to that.

In addition, since a plurality of lamps are installed in one reflector, a conventional process of attaching a plurality of divided reflectors with a screw or an adhesive is omitted, thereby reducing the time required to assemble the liquid crystal display. In the first embodiment, since the lamp holder is used as the fixing part, the weight of the liquid crystal display device is reduced compared to the type.

 As described above, the present invention provides fixing parts at both ends of the lamp, and forms a fastening part to which the fixing parts are fastened to one side edge and the other edge of the reflective plate in the width direction, thereby directly fixing the plurality of lamps to the reflecting plate.

Then, when all of the lamps installed on the reflector are not turned on, the lamp replacement work may be improved, the time required for assembling the liquid crystal display device may be reduced, and the weight of the liquid crystal display device may be reduced.

Claims (13)

A mold frame in which a storage space is formed; A reflection plate installed on a bottom surface of the storage space and having a plurality of fastening portions formed at one side edge and the other edge in a width direction with a predetermined interval therebetween; A plurality of lamps are installed on the upper surface of the reflecting plate and spaced apart from each other by a predetermined distance, and electrodes are formed at one end and the other end to emit light, and are coupled to one end and the other end of the lamps, respectively. A lamp unit coupled to the fastening part and including an inverter electrically connected to the electrode by fixing parts and wires for fixing the lamps to the upper surface of the reflecting plate and supplying power to the lamps; A diffusion plate installed on the upper surfaces of the lamps to diffuse light emitted from the lamps; And And a liquid crystal display (LCD) panel installed on the diffusion plate to display information. The LCD of claim 1, wherein the fixing unit is a lamp holder. The liquid crystal display device of claim 2, wherein the fastening part forms a holder insertion hole through which predetermined portions of the one side and the other edge protrude toward the diffusion plate to insert the lamp holder. The method of claim 3, wherein in order to prevent the lamps fixed to the reflecting plate from being separated from the reflecting plate, an anti-separation groove is formed in the upper surface of the lamp holder facing the diffuser plate to a predetermined depth, And a boss fitted into the release preventing groove on an inner side of the fastening portion facing the side of the fastening portion. The liquid crystal display of claim 1, wherein the lamp unit further comprises lamp holders fitted to one end and the other end of the lamps to protect the lamps and to be fitted to the fixing parts, respectively. The method of claim 5, wherein the fixing portion A holder insertion hole into which the lamp holder is fitted; And And a guide slit formed at a portion spaced apart from the bottom of the holder insertion hole by a predetermined distance to guide the fixing part to the fastening part. The guide slit of claim 6, wherein the fastening part protrudes a predetermined height toward the diffusion plate so as to face each other at predetermined portions of the one side and the other edge, and the protruding end is bent horizontally with respect to the reflecting plate. The liquid crystal display device of the direct type characterized in that it is inserted into the guide portion to the fastening portion. 10. The method of claim 7, wherein the lamps fixed to the reflecting plate to form a separation preventing groove in a predetermined depth of the guide slit to prevent the departure from the reflecting plate, the bent opposite to the separation prevention groove The liquid crystal display device of the direct type characterized in that the boss portion is formed in the portion to prevent the separation groove. The clip of claim 5, wherein the fixing part is a clip having one side and the other side facing the lamp holder and a lower side facing the reflecting plate and having an elastic force. A holder insertion part formed in a shape corresponding to the lamp holder at a portion corresponding to the lamp holder to insert the lamp holder; A support part formed on a bottom surface of the holder insertion part and formed to be narrower than an interval of the holder insertion part to support the lamp holder; And The lower end portion of the support portion is formed to be bent to the outside of the clip to be parallel to the reflecting plate, the external force is applied to the support portion is inserted into the fastening portion when the support portion is contracted, and is relaxed when the external force applied to the support portion is removed And a latching part fixed to the lower surface of the reflecting plate. 10. The LCD of claim 9, wherein the fastening part is a rectangular through hole corresponding to the locking part. delete delete According to claim 1, Protruding portion protruding by a predetermined height toward the diffusion plate in the region between the one side edge and the other edge of the reflective plate in order to pull out the wire to the lower surface of the reflective plate, the fastening portion is formed And a bead is formed at the one edge and the other edge from the protrusion to one side of the one side and the other edge.

Images