KR20080032551A - Backlight assembly - Google Patents

Abstract

A backlight assembly is provided to couple an insulating member with a shield case with ease by using an embossing unit and an insertion groove, thereby reducing work time, preventing environmental pollution and preventing noise caused by shaking of the insulating member. A backlight assembly comprises one or more lamps, a bottom chassis for receiving the lamps, an inverter, a shield case(200) and an insulating member(300). The inverter is disposed in the rear of the bottom chassis, and supplies power to the lamps. The shield case covers the inverter. The insulating member is interposed between the shield case and the inverter, and fastened in the inside of the shield case. The shield case has a fastening groove(210), and the insulating member has a fastening hook(310).

Description

Backlight assembly

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

2 is a bottom perspective view of a backlight assembly according to a first embodiment of the present invention.

3 is an exploded perspective view illustrating a coupling relationship between a shield case and an insulating member included in the backlight assembly according to the first exemplary embodiment of the present invention.

4A is a perspective view illustrating a state in which a shield case and an insulating member included in the backlight assembly according to the first exemplary embodiment of the present invention are combined.

4B is an enlarged perspective view illustrating portion 'A' of FIG. 4A.

5 is an exploded perspective view illustrating a coupling relationship between a shield case and an insulating member included in a backlight assembly according to a second exemplary embodiment of the present invention.

6A is a perspective view illustrating a state in which a shield case and an insulating member included in the backlight assembly according to the second exemplary embodiment of the present invention are combined.

6B is an enlarged perspective view illustrating a portion 'B' of FIG. 6A.

(Explanation of symbols for the main parts of the drawing)

100: backlight assembly 120: lamp

150: reflective sheet 170: bottom chassis

180: inverter 181: transformer

200: shield case 210: fastening groove

300: insulation member 310: fastening hook

The present invention relates to a backlight assembly, and more particularly, to a backlight assembly in which the sheath case and the insulating member are easily fastened.

Liquid Crystal Display (LCD) is one of the most widely used flat panel displays (FPD), and consists of two substrates on which electrodes are formed and a liquid crystal layer interposed therebetween. A display device adjusts the amount of light transmitted by rearranging liquid crystal molecules of a liquid crystal layer by applying a voltage to an electrode.

Since the liquid crystal display itself is non-luminous, a separate lamp for irradiating light is required, and an inverter for applying power to the lamp is required to drive the lamp.

The inverter is shielded by a shield case and an insulating member so as to protect the transformer provided in such an inverter and prevent the worker from being exposed to the high heat of the transformer.

However, the process of assembling the shield case and the insulating member is not easy, and when they are bonded, harmful substances may be generated due to the adhesive, and noise may be generated by the shaking of the insulating member.

Therefore, the assembling process is easy, and it is necessary to suppress the generation of harmful substances and to prevent noise caused by the shaking of the insulating member.

An object of the present invention is to provide a backlight assembly that is easy to fasten the shield case and the insulating member.

Technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a backlight assembly comprising: one or more lamps, a bottom chassis for accommodating the lamps, and an inverter disposed on a rear surface of the bottom chassis to supply power to the lamps; And a shield case covering the inverter and an insulating member interposed between the shield case and the inverter and fastened to an inner surface of the shield case.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

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

1 to 4B, a backlight assembly according to a first embodiment of the present invention will be described in detail. 1 is an exploded perspective view of a backlight assembly according to a first embodiment of the present invention.

As shown in FIG. 1, the backlight assembly 100 according to the first embodiment of the present invention may include a lamp 120, a diffuser plate 130, an optical sheet 140, a reflective sheet 150, and a mold frame 160. ), A bottom chassis 170, an inverter 180, a shield case 200, and an insulating member 300.

The lamp 120 serves to provide light to a liquid crystal panel (not shown) of a liquid crystal display (not shown), which is a passive light emitting device, and as the lamp 120, a cold cathode fluorescent lamp (CCFL) and a hot cathode (HCFL). Fluorescent Lamp), External Electrode Fluorescent Lamp (EEFL), and the like are exemplified.

The lamp 120 generates light by the lamp driving voltage applied from the inverter 180 to the lamp 120. In addition, the lamp 120 may be connected in parallel in phase with one or more lamps 120 spaced at a uniform distance, and may be configured as a direct type or an edge type.

The diffusion plate 130 may be disposed above the lamp 120, may be provided in a flat plate shape, and the diffusion material may be dispersed. The diffusion plate 130 serves to make the luminance of the light emitted from the lamp 120 uniform.

The optical sheet 140 is disposed on the diffusion plate 130 and serves to diffuse and collect light transmitted from the lamp 120. The optical sheet 140 may include a diffusion sheet, a first prism sheet, a second prism sheet, and the like, and the second prism sheet may be omitted when only the first prism sheet can sufficiently perform the function. have.

The reflective sheet 150 is disposed under the lamp 120 and has a reflective surface that reflects light emitted from the lamp 120 toward the bottom chassis 170 to the liquid crystal panel (not shown). In addition, the reflective sheet 150 may include an inclined reflective surface to efficiently reflect the light emitted from the lamp 120.

The mold frame 160 accommodates the lamp 120, the diffusion plate 130, the optical sheet 140, and the reflective sheet 150, and is seated and fixed to the bottom chassis 170.

The mold frame 160 is formed of sidewalls formed along the edge of the rectangular shape, and serves to protect the diffusion plate 130 and the optical sheet 140 and the like, and an open window is formed at an upper portion thereof to exit the lamp 120. The structured light can be visually recognized.

The bottom chassis 170 may have a rectangular shape, and sidewalls are formed along an edge thereof, and the lamp 120, the diffuser plate 130, the optical sheet 140, and the reflective sheet 150 may be formed in a space formed of the sidewalls. ), And so on.

An inverter 180 for supplying a constant voltage and current to the lamp 120 is disposed at one edge of the bottom of the bottom chassis 170.

The inverter 180 includes a transformer for converting voltage (see 181 of FIG. 2), an inverter driving integrated circuit (not shown) for driving an inverter circuit, and an inverter circuit board (not shown) in which they are mounted.

In the transformer, voltage conversion occurs, which causes a large amount of magnetic flux in the transformer, high heat dissipation, and electromagnetic waves in the inverter driving integrated circuit.

Hereinafter, the shield case 200 and the insulating member 300 will be described in detail with reference to FIGS. 2 to 4B. 2 is a bottom perspective view of a backlight assembly according to a first embodiment of the present invention. 3 is an exploded perspective view illustrating a coupling relationship between a shield case and an insulating member included in the backlight assembly according to the first exemplary embodiment of the present invention. 4A is a perspective view illustrating a state in which a shield case and an insulating member included in the backlight assembly according to the first exemplary embodiment of the present invention are combined. 4B is an enlarged perspective view illustrating portion 'A' of FIG. 4A.

Referring to FIG. 2, the shield case 200 covers the inverter 180 and is fixed to one side of the bottom surface of the bottom chassis 170.

The shield case 200 may cover the inverter 180 so as to cover the inverter 180, the cover plate 250 which is bent toward the bottom chassis 170 from the top plate, and the top plate described above with the bottom chassis 170. The contact preventing unit 260 is spaced apart from the contact unit 180 so as not to contact the inverter 180.

The upper plate of the shield case 200 is provided with a fastening groove 210 to be coupled to the insulating member 300, and hooks 310 of the insulating member 300 to the fastening groove 210 of the shield case 200. Is coupled, the insulating member 300 can be easily fastened to the shield case 200.

The fastening groove 210 may be provided outside the open window 220 of the shield case 200 in consideration of the width of the insulating member 300 shielding the open window 220.

The fastening groove 210 is not limited to the number shown, and a larger number of fastening grooves 210 may be formed to firmly fasten the insulating member 300 to the shield case 200.

The open window 220 is formed at a position corresponding to the upper plate of the shield case 200, specifically, the transformer 181 of the upper plate.

The open window 220 not only releases heat generated in the transformer 181 but also increases shielding efficiency of electromagnetic waves generated from the inverter 180.

The upper plate of the shield case 200 may be provided with a display window 230 on one side and a heat dissipation hole 240 on the other side with respect to the open window 220.

The display window 230 checks whether the inverter 180 and the lamp 120 socket are connected to each other and releases heat generated from the inverter 180 to the outside.

A plurality of heat dissipation holes 240 are provided on the upper plate of the shield case 200, and serve to discharge heat generated from the inverter 180 to the outside.

The cover part 250 is bent from the top plate to be in contact with one edge of the bottom chassis 170, and serves to protect the side of the inverter 180.

The cover part 250 may be bent in two or more steps so as not to contact the edge of the inverter 180 or may have an arc shape.

The contact preventing unit 260 is spaced apart from the bottom chassis 170 so that the shield case 200 does not come into contact with the inverter 180, and the shield case 200 is fastened so that the shield case 200 may be screwed to the bottom chassis 170. Grooves may be provided.

The shield case 200 may be made of a conductive metal to protect the inverter 180 and to shield electromagnetic waves generated from the inverter driving integrated circuit.

The insulating member 300 is fastened and fixed to an inner side surface of the shield case 200, specifically, a center portion of the inner side surface of the upper plate of the shield case 200.

The insulating member 300 blocks heat generated from the transformer 181 of the inverter 180 to prevent a worker from contacting the transformer 181 of high temperature and insulates the transformer 181.

The insulating member 300 has a rectangular plate shape as a whole and is fastened to the shield case 200 to shield the open window 220 of the shield case 200.

One surface of the insulating member 300 of the present embodiment is provided with a plurality of fastening hooks 310 at positions corresponding to the fastening grooves 210 to fasten the insulating member 300 to the shield case 200.

The fastening hook 310 may be formed near the edge of the insulating member 300 so as to be inserted into the fastening groove 210 formed at the outer side of the opening window 220, and the insulating member 300 is shielded case 200. It may be provided with a plurality so as to be firmly fastened to.

By inserting the fastening hook 310 into the fastening groove 210 formed on the inner surface of the upper surface of the shield case 200, the insulating member 300 may be easily fastened and fixed to the shield case 200.

Specifically, the fastening hook 310 may be formed in a cylindrical shape having, for example, a pair of hemispherical and hemispherical lower portions and having a diameter smaller than the hemispherical diameter. The pair of hemispherical shapes are composed of a fixing member that can flow on both sides, so that when the shield case 200 is inserted from the upper portion of the fastening hook 310, the hemisphere-shaped flow portions are moved closer to each other, so that the insulating member 300 is easily moved. After insertion, after the insertion is complete, the hemispherical flow portion returns to its original shape and the fastening groove 210 is fixed to the cylindrical portion.

Although the hemispherical shape is described as an example of the flow portion of the fastening hook 310 of the present embodiment, the present invention is not limited thereto, and various modifications are possible as long as the shape is easy to insert and fasten, such as a wedge shape, a triangular column shape, and further insulation. Of course, various fastening methods may be applied regardless of the name as long as the member 300 can be easily fixed to the shield case 200.

The insulating member 300 including the fastening hook 310 may be manufactured by injection molding using a material having rigidity and transparency, for example, polycarbonate (PC).

By manufacturing the insulating member 300 by an injection molding method, a plate-shaped insulating member having rigidity can be obtained, and a fastening hook 310 having a somewhat complicated shape can be provided, so that the vibration of the insulating member 300 during noise measurement can be provided. The phenomenon is prevented and the insulating member 300 can be easily fixed to the shield case 200 even without a separate attachment means.

Insulating member 300 of the present embodiment is made of a transparent material, the operator can visually check the high-temperature transformer 181 through the open window (200). The fact that the insulating member 300 is made of a transparent material and can be visually confirmed is shown by the transformer 181 shown in dashed lines in FIG. 2.

According to the backlight assembly 100 according to the present exemplary embodiment, the insulating member 300 is easily attached to the shield case 200 by using the fastening hook 310 without having a separate attaching means, thereby improving work time. It is possible to reduce and prevent the problem of environmental pollution by having a separate attachment means, and by manufacturing the rigid insulating member 300 by the injection molding method, to prevent the noise caused by the shaking of the insulating member 300 can do.

Hereinafter, a backlight assembly according to a second exemplary embodiment of the present invention will be described with reference to FIGS. 5 to 6B. 5 is an exploded perspective view illustrating a coupling relationship between a shield case and an insulating member included in a backlight assembly according to a second exemplary embodiment of the present invention. 6A is a perspective view illustrating a state in which a shield case and an insulating member included in the backlight assembly according to the second exemplary embodiment of the present invention are combined. 6B is an enlarged perspective view illustrating a portion 'B' of FIG. 6A. For convenience of description, members having the same function as the members shown in the drawings of the previous embodiment are denoted by the same reference numerals, and thus description thereof is omitted. 5 to 6B, the backlight assembly according to the present exemplary embodiment has the same structure as the backlight assembly 100 according to the previous exemplary embodiment of the present invention except for the following. That is, the backlight assembly according to the present exemplary embodiment includes the shield case 201 and the embossing part 211 by the embossing part 211 provided in the shield case 201 and the insertion groove 311 provided in the insulating member 301. Is combined.

The backlight assembly according to the present embodiment is the same as the previous embodiment as a lamp (not shown), diffuser (not shown), optical sheet (not shown), reflective sheet (not shown), mold frame (not shown), such as A bottom chassis (not shown), an inverter (not shown), a shield case 201, and an insulating member 301 that accommodate lamps are included.

The inverter is located at one edge of the bottom of the bottom chassis to supply a constant voltage and current to the lamp.

The inverter includes an inverter printed circuit board and a transformer mounted on the inverter printed circuit board.

The shield case 201 is disposed at a side edge of the bottom of the bottom chassis so as not to contact the inverter to cover the inverter.

Shield case 201 is to cover the inverter as in the previous embodiment, the top plate made of a generally rectangular flat plate shape, the cover portion 250 is bent from the top plate to the bottom chassis side, and the contact preventing portion 260 Include.

The upper surface of the shield case 201 is provided with an embossed portion 211 protruding to be coupled with the insulating member 301 differently from the previous embodiment, and is insulated from the embossed portion 211 of the shield case 201. The insertion groove 311 of the member 301 may be inserted to easily fix the insulating member 301 to the shield case 201.

The embossing part 211 may be provided outside the opening window 220 of the shield case 201 in consideration of the width of the insulating member 301 shielding the opening window 220, and shields the insulating member 301. A plurality of embossing parts 211 may be provided to firmly fix the case 201.

The embossing portion 211 may be formed by embossing on the inner surface of the shield case 201, and adjusts the height thereof in consideration of a separation distance from the inverter so as not to contact the inverter.

The shape of the embossed portion 211 may be, for example, a cone shape, but is not limited to the shape as long as the insulating member 301 can be easily fixed to the shield case 201.

The upper surface of the shield case 201 not only serves to dissipate heat generated from the transformer but also increases the shielding efficiency of electromagnetic waves generated from the inverter, the display window 230 formed on one side of the open window 220 and the open window 220. ), The heat dissipation hole 240 formed on the other side may be provided.

The shield case 201 is bent from the top plate to be in contact with one edge of the bottom chassis, and the cover part 250 which serves to protect the side of the inverter, and the shield case 201 are spaced apart from the bottom chassis to be in contact with the inverter. The contact preventing part 260 may be provided to prevent the contact.

The shield case 201 may be made of a conductive metal to protect the inverter and shield electromagnetic waves generated from the inverter driving integrated circuit.

An insulating member 301 is fastened and fixed to an inner side surface of the shield case 201, specifically, an inner side center portion of the upper plate of the shield case 201.

The insulating member 301 has a rectangular plate shape as a whole and is fastened to the shield case 201 so as to shield the opening window 220 of the shield case 201.

On one surface of the insulating member 301 of the present embodiment, a plurality of insertion grooves 311 are provided to fasten the insulating member 301 to the shield case 201. The insertion groove 311 is formed at a position corresponding to the embossing portion 211.

By inserting the embossing part 211 into the insertion groove 311, the insulating member 301 may be easily fastened and fixed to the shield case 201.

The insulating member 301 including the insertion groove 311 may be manufactured by injection molding using, for example, a material having rigidity such as polycarbonate (PC).

By manufacturing the insulating member 301 by the injection molding method, a plate-shaped insulating member having rigidity can be obtained, and the shaking phenomenon of the insulating member 301 is prevented during noise measurement, and the embossed portion ( The insulating member 301 may be easily fixed to the shield case 201 even though the electronic device 211 is not provided with a separate attachment means.

According to the backlight assembly according to the present embodiment, the insulating member 301 is easily attached to the shield case 201 by using the embossing portion 211 and the insertion groove 311 without providing a separate attachment means. In addition, it is possible to reduce the working time and prevent the environmental pollution by the separate attachment means, and by manufacturing the rigid insulating member 301 by injection molding method, noise caused by the vibration of the insulating member 301 It can be prevented from occurring.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

According to the backlight assembly according to the embodiments of the present invention as described above, by having a shield case for protecting the inverter and a fastening portion for easily coupling the insulating member, to reduce the process time for their fastening, It is possible to reduce the cost due to the reduction of the attachment means, to prevent the occurrence of environmental pollution problems, and to prevent the noise caused by the shaking of the insulating member.

Claims (7)

One or more lamps; A bottom chassis for accommodating the lamp; An inverter disposed on a rear surface of the bottom chassis to supply power to the lamp; A shield case covering the inverter; And And an insulating member interposed between the shield case and the inverter and fastened to an inner surface of the shield case. According to claim 1, And the shield case and the insulating member are coupled to each other by a hook. The method of claim 2, The shield case has a fastening groove, the insulation member has a fastening hook. According to claim 1, The insulation member is manufactured in a plate shape by injection molding. According to claim 1, The inverter includes an inverter printed circuit board and a transformer mounted on the inverter printed circuit board, and an open window is formed at a position corresponding to the transformer in the shield case, and the insulation member shields the open window. A backlight assembly coupled to the shield case. According to claim 1, The shield case is made of a conductive metal, the backlight assembly is fastened to the back of the bottom chassis so as not to contact the inverter. According to claim 1, The shield case has an embossed portion, the insulation member has an insertion groove, the embossed portion is inserted into the insertion groove, the backlight assembly is fastened to the shield case.

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