KR20090055207A - Lamp assembly and liquid crystal display device module including the same - Google Patents

Abstract

A lamp assembly and an LCD(Liquid Crystal Display) module including the same are provided to combine one side of a lamp housing through a fixing end and assemble the other side with a cover bottom through a screw. An LCD(Liquid Crystal Display) module comprises an LC panel, an optical sheet, a light guide plate, a lamp(123b), a lamp housing(200b), a cover bottom, and a top cover. The optical sheet is interposed in a lower part of the LC panel. The light guide plate is installed in a lower part of the plural optical sheets. The lamp is arranged along one side edge longitudinal direction of the light guide plate. The lamp is mounted within the lamp housing. The lamp housing includes a first surface(201), a second surface(203) parallel to the first surface, and a third surface(205) vertical to the first and second surfaces. In one end of a longitudinal direction of the second surface, a vertically-bent fixing end(209) is configured towards a rear side of the second surface. In the cover bottom, a fixing groove in which the fixing end is inserted is installed. The top cover is assembled with the cover bottom.

Description

Lamp assembly and liquid crystal display device module including the same

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to liquid crystal displays, and more particularly, to the modularization of lamp housings of liquid crystal displays.

In line with the recent information age, the display field has also been rapidly developed, and a liquid crystal display device (FPD) is a flat panel display device (FPD) having advantages of thinning, light weight, and low power consumption. LCD, plasma display panel device (PDP), electroluminescence display device (ELD), field emission display device (FED), etc. : It is rapidly replacing CRT.

Among them, liquid crystal display devices are most actively used in the field of notebooks, monitors, TVs, etc. due to their excellent contrast ratio and high contrast ratio. The liquid crystal display device is a device that does not have its own light emitting element. Will require a light source.

As a result, a backlight unit having a lamp is provided on the rear side to irradiate light toward the front of the liquid crystal panel, thereby realizing an image of identifiable luminance.

On the other hand, the general backlight unit is divided into a direct type (edge type) and an edge type (edge type) according to the arrangement of the lamp largely, in the direct method, several lamps are located at the bottom of the liquid crystal panel, As a structure for directly injecting light, such a structure has a disadvantage of high power consumption, high unit cost, and a thick liquid crystal display device.

On the other hand, the edge type has a structure in which light is incident on the light guide plate and the reflecting plate by placing a lamp on one side or both sides of the liquid crystal panel, which is easier to manufacture than the direct type, and is thin and light in weight and low in power consumption. It is used.

1 is an exploded perspective view illustrating a general liquid crystal display device module, and FIG. 2 is a cross-sectional view of FIG. 1.

As illustrated, a general liquid crystal display device module includes a liquid crystal panel 10, a backlight unit 20, a support main 30, a cover bottom 40, and a top cover 50.

The liquid crystal panel 10 is a part that plays a key role in image expression and is composed of first and second substrates 12 and 14 bonded to each other with a liquid crystal layer interposed therebetween. Along the two adjacent edges of the liquid crystal panel 10, the printed circuit boards 17a and 17b are connected to each other through the connecting member 19.

The backlight unit 20 is provided behind the liquid crystal panel 10.

In this case, the backlight unit 20 includes first and second lamps 23a and 23b arranged along both longitudinal directions of the support main 30, and a white or silver reflecting plate 22 seated on the cover bottom 40. ), A light guide plate 26 mounted on the reflective plate 22, and a plurality of optical sheets 29 interposed thereon.

At this time, the first and second lamp housings 21a and 21b for guiding the first and second lamps 23a and 23b are further provided, and the first and second lamp housings 21a and 21b are light guide plates 26, respectively. ), The light is concentrated in the direction of the light guide plate 26 along with the protection of the lamps 23a and 23b by surrounding the upper and lower sides and the outside of the respective first and second lamps 23a and 23b with the inner side toward the opening. .

Accordingly, the light emitted from the first and second lamps 23a and 23b is incident on the side of the light guide plate 26 by the first and second lamp housings 21a and 21b, respectively, and is refracted in the direction of the liquid crystal panel 10. And, while passing through the plurality of optical sheets 29 is processed to a high quality of uniform brightness is supplied to the liquid crystal panel 10.

The liquid crystal panel 10 and the backlight unit 20 have a top cover 50 covering the top edge of the liquid crystal panel 10 and the back surface of the backlight unit 20 in a state where the edges are surrounded by the support main 30 having a rectangular frame shape. Cover cover 40 to cover each is coupled in front and rear are integrated through the support main 30 as a medium.

In this case, reference numerals denote polarizers 18 attached to outer surfaces of the first and second substrates 12 and 14 of the liquid crystal panel 10.

On the other hand, according to the method of modularizing the above-described lamp (23a, 23b) is divided into a dropping method and a slide method, the dropping method is a lamp housing (21a, 21b) in which the lamp 23a, 23b is mounted therein the light guide plate ( 26 is a method of seating on one side or both sides, and the slide method is to slide the lamp housing (21a, 21b) in which the lamp housing (23a, 23b) is mounted to the side or both sides of the light guide plate (26). 23a, 23b) when the end of life and when the lamp (23a, 23b) is broken there is an advantage that it is easy to replace.

Accordingly, the first and second lamp housings 21a and 21b surround the upper and lower and outer sides of the first and second lamps 23a and 23b, respectively, to provide light with the protection of the lamps 23a and 23b. Direction, comprising a first surface, a second surface parallel to the first surface, and a third surface perpendicular to the first and second surfaces, with lamps 23a and 23b mounted therein. The first and second surfaces slide in contact with the upper and lower surfaces of the opposite side edges of the light guide plate 26.

As such, the first and second lamp housings 21a and 21b slide-inserted as shown in FIG. 2 have a second surface wider than the first surface, and cover cover 40 and screw through the second surface. It is fixed through the fixing members 60a, 60b, 60c, 60d of the back.

At this time, at least two fixing members 60a, 60b, 60c, 60d such as screws are provided at both ends of the first and second lamp housings 21a and 21b in the longitudinal direction.

The fixing members 60a and 60b provided at one end in the longitudinal direction of the first and second lamp housings 21a and 21b are directions in which the first and second lamp housings 21a and 21b are parallel to the longitudinal direction, that is, the drawing. The fixing members 60c and 60d provided at the other ends of the first and second lamp housings 21a and 21b in the longitudinal direction of the first and second lamp housings 21a and 21b are prevented from flowing in the y direction defined by the phases. The flow in the direction perpendicular to the longitudinal direction of 21b), that is, in the x direction defined in the drawing is prevented.

In this case, the fixing members 60a, 60b, 60c, and 60d may respectively fix both ends of the first and second lamp housings 21a and 21b on the cover bottom 40, respectively. And 21b).

That is, an AC voltage of high voltage is used to drive the first and second lamps 23a and 23b, and the electromagnetic induction phenomenon is generated by the high voltage. Therefore, electromagnetic waves are generated in the first and second lamp housings 21a and 21b made of metal in contact with the first and second lamps 23a and 23b, which are periodically generated by wave noise or the like. This may interfere with the operation characteristics of the liquid crystal display device.

Therefore, the electromagnetic wave is shielded by fastening the first and second lamp housings 21a and 21b with the cover bottom 40 through fixing members 60a, 60b, 60c, and 60d such as screws to prevent electromagnetic waves.

However, assembling and fastening both ends of the first and second lamp housings 21a and 21b with the cover bottom 40 through fixing members 60a, 60b, 60c, and 60d such as screws may be performed manually by an operator. In addition, the processing time is increased and the process cost is increased due to the consumption of the fixing members 60a, 60b, 60c, and 60d.

The present invention is to solve the above problems, the first object is to reduce the process time and the process cost in the process of assembling the lamp housing.

In addition, the second object is to protect the lamp, which is a unique role of the lamp housing, and to concentrate light emitted from the lamp in the direction of the light guide plate.

In order to achieve the above object, the present invention is a liquid crystal panel; A plurality of optical sheets interposed under the liquid crystal panel; A light guide plate provided below the plurality of optical sheets; A lamp arranged along a longitudinal direction of one edge of the light guide plate; The lamp is mounted therein, and comprises a first surface, a second surface parallel to the first surface, and a third surface perpendicular to the first and second surfaces, the longitudinal direction of the second surface being A lamp housing having a fixed end which is vertically bent toward the rear surface of the second surface; A cover bottom having a fixing groove into which the fixing end is inserted; Provided is a liquid crystal display module including a top cover assembled with the cover bottom.

The fixed end is characterized in that the height is not exposed to the back of the cover bottom, the width of the fixed end is characterized in that it corresponds to the width of the fixing groove of the cover bottom.

In addition, the lamp is characterized in that it is further added to the other edge of the light guide plate, characterized in that at least two lamps are arranged in multiple layers.

In addition, the present invention is a lamp; Wherein the lamp is mounted therein and comprises a lamp housing comprising a first surface, a second surface parallel to the first surface, and a third surface perpendicular to the first and second surfaces, the second housing One end in the longitudinal direction of the surface provides a lamp assembly, characterized in that the fixed end is vertically bent toward the back of the second surface.

At this time, the second surface is characterized in that it has a wider width than the first surface, and the other end of the second surface consisting of the fixed end is characterized in that a hole (hole) for inserting the fixing member is formed.

In addition, the inner surface of the lamp housing is characterized in that the reflective film is formed, the reflective film is characterized in that one of the synthetic resin or the reflective sheet.

At this time, the lamp is characterized in that at least two are arranged in multiple layers.

As described above, according to the present invention, one side of the lamp housing is coupled to the fixed end, and the other side thereof is assembled and fastened with the cover bottom through the screw, thereby reducing the process cost by eliminating the fixing member such as the screw compared to the conventional process The time is shortened.

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

3 is an exploded perspective view showing a liquid crystal display module according to an embodiment of the present invention.

As shown, the liquid crystal display module includes a liquid crystal panel 110, a backlight unit 120, a support main 130, a cover bottom 140, and a top cover 150.

First, the liquid crystal panel 110 plays a key role in image expression, and includes the first and second substrates 112 and 114 bonded to each other with the liquid crystal layer interposed therebetween.

In this case, although it is not clearly shown in the drawings under the premise of an active matrix method, a plurality of gate lines and data lines intersect on the inner surface of the first substrate 112, which is commonly referred to as a lower substrate or an array substrate, and a pixel is defined. Thin film transistors (TFTs) are provided at each intersection to be connected one-to-one with the transparent pixel electrodes formed in each pixel.

In addition, an inner surface of the second substrate 114 called an upper substrate or a color filter substrate includes, for example, a color filter of R, G, and B colors, each of which includes a gate line, a data line, A black matrix covering a non-display element such as a thin film transistor is provided. In addition, a transparent common electrode covering them is provided.

The printed circuit boards 117a and 117b are connected to each other along at least one edge of the liquid crystal panel 110 via a connecting member 119 such as a flexible circuit board. (140) It is folded to the back and adheres.

Although not clearly shown in the drawings, upper and lower alignment layers (not shown) for determining the initial molecular alignment direction of the liquid crystal are interposed between the two substrates 112 and 114 of the liquid crystal panel 110 and the liquid crystal layer. In order to prevent leakage of the liquid crystal layer filled therebetween, a seal pattern is formed along edges of both substrates 112 and 114.

In this case, upper and lower polarizers (not shown) are attached to outer surfaces of the first and second substrates 112 and 114, respectively.

A backlight unit 120 for supplying light is provided on a rear surface of the liquid crystal panel 110 such that a difference in transmittance of the liquid crystal panel 110 is expressed to the outside.

The backlight unit 120 includes first and second lamps 123a and 123b arranged along the longitudinal direction of both edges of the support main 130, and a white or silver reflecting plate 122 mounted on the cover bottom 140. And a light guide plate 126 mounted on the reflective plate 122 and a plurality of optical sheets 129 interposed therebetween.

That is, the first and second lamps 123a and 123b are positioned at both sides of the light guide plate 126.

Here, the first and second lamps 123a and 123b may use fluorescent lamps such as cold cathode fluorescent lamps or external electrode fluorescent lamps.

In this case, the first and second lamp housings 200a and 200b for guiding the first and second lamps 123a and 123b are further provided, and the first and second lamp housings 200a and 200b are light guide plates 126, respectively. ), The light is concentrated in the direction of the light guide plate 126 along with the protection of the lamps 123a and 123b by surrounding the upper and lower sides and the outside of the first and second lamps 123a and 123b with the inner side toward the opening. .

In addition, the light guide plate 126 evenly spreads the light incident from the first and second lamps 123a and 123b to a wide area of the light guide plate 126 while traveling inside the light guide plate 126 by a plurality of total reflections. Provide a surface light source at 110. The light guide plate 126 may include a pattern of a specific shape on the rear surface to supply a uniform surface light source.

The reflecting plate 122 is positioned on the rear surface of the light guide plate 126 to improve the brightness of the light by reflecting light passing through the rear surface of the light guide plate 126 toward the liquid crystal panel 110.

The optical sheet 129 on the light guide plate 126 includes a diffusion sheet and at least one light collecting sheet.

Therefore, the light emitted from the first and second lamps 123a and 123b is incident on the side of the light guide plate 126 by the first and second lamp housings 200a and 200b, respectively, and is refracted in the direction of the liquid crystal panel 110. And, while passing through a plurality of optical sheets 129 is processed to a high quality of uniform brightness is supplied to the liquid crystal panel 110.

In this case, the backlight unit 120 having the above-described structure is commonly referred to as a side light method, and a plurality of lamps 123a and 123b may be arranged in multiple layers into the lamp housings 200a and 200b according to the purpose. It is also possible to arrange the plurality of lamps 123a and 123b into multiple layers into the lamp housing interposed along the longitudinal direction of one edge of the main 130.

The liquid crystal panel 110 and the backlight unit 120 are modularized through the top cover 150, the support main 130, and the cover bottom 140. The top cover 150 is the top and side surfaces of the liquid crystal panel 110. A rectangular frame having a cross section bent in a shape of “a” so as to cover an edge thereof is configured to open an entire surface of the top cover 150 to display an image implemented in the liquid crystal panel 110.

In addition, the cover bottom 140 on which the liquid crystal panel 110 and the backlight unit 120 are seated and which is the basis for assembling the entire structure of the LCD device module has a plate-shaped bottom surface and four edges thereof vertically bent upwards. It consists of.

The support main body 130, which is mounted on the cover bottom 140 and surrounds the edges of the liquid crystal panel 110 and the backlight unit 120, is combined with the top cover 150 and the cover bottom 140. .

On the other hand, the present invention is the lamp through the first and second lamps (123a, 123b) from the side of the light guide plate 126 by sliding the lamp housing (200a, 200b) mounted therein the lamps (123a, 123b) mounted therein Modularize 123a and 123b.

Such a slide insertion method has an advantage of being easy to replace when the lamps 123a and 123b have reached the end of their life and when the lamps 123a and 123b are broken.

In particular, the present invention is characterized in that the lamp housing (200a, 200b) by configuring a separate fixed end, the lamp housing (200a, 200b) and the assembly assembly cover fastening 140 through the fixed end. This will be described in more detail with reference to FIG. 4.

4 is a perspective view illustrating a structure of a lamp housing according to an exemplary embodiment of the present invention.

As shown in the drawing, the lamp housing 200b has a structure in which one surface is opened to emit light to mount the lamp 123b therein to guide the top, bottom, and outside of the lamp 123b. ), A second surface 203 parallel to the first surface 201, and a third surface 205 perpendicular to the first surface 201 and the second surface 203.

At this time, the lamp housing 200b has a wider first surface 201 than the second surface 203, and a screw is formed on the first surface 201 of one end of the first surface 201 of the lamp housing 200b. The screw hole 207 into which the fixing members (160a and 160b of FIG. 3) of such a back are inserted is provided.

Therefore, one edge of the first surface 201 of the lamp housing 200b is assembled with the cover bottom (140 in FIG. 3) through fixing members (160a and 160b in FIG. 3) such as a screw. Due to this, one edge of the first surface 201 of the lamp housing 200b is stably assembled and fixed with the cover bottom (140 in FIG. 3), and at the same time, the lamp is fixed through a fixing member (160b in FIG. 3) such as a screw. The housing 200b is grounded to the cover bottom (140 in FIG. 3).

At this time, one edge of the first surface 201 of the lamp housing 200b prevents the flow in the direction parallel to the longitudinal direction of the lamp housing 200b, that is, the y direction defined in the drawing.

On the other hand, the other end edge of the first surface 201 of the lamp housing 200b provides a fixed end 209, the fixed end 209 is bent vertically downward by extending one edge of the first surface 201. do.

That is, the shape formed by the first surface 201 and the fixed end 209 may have a "a" shape with a cross section cut along the longitudinal direction of the first surface 201.

5A through 5B, the structure of the fixed end 209 will be described in more detail. 5A to 5B are perspective views showing a part of the rear surface of the cover bottom and the lamp housing.

As shown in FIG. 5A, the lamp housing 200b having the lamp 123b mounted therein is inserted from the side of the cover bottom 140 in the y direction defined in the drawing, which is the longitudinal direction of the lamp housing 200b. do.

In this case, a fixing groove 140a to which the fixing end 209 may be inserted is provided at the bottom surface of the cover bottom 140 assembled with the lamp housing 200b. Therefore, the fixed end 209 of the lamp housing 200b is inserted into the fixing groove 140a of the cover bottom 140 so that the lamp housing 200b and the cover bottom 140 are assembled to each other.

As such, when the lamp housing 200b slides into the cover bottom 140, the fixed end 209 formed by bending the lamp housing 200b perpendicular to the first surface 201 of the lamp housing 200b as shown in FIG. 5B is covered. The fixing end 209 is fitted into the fixing groove 140a of the bottom 140 and is fixed in close contact with the fixing groove 140a.

The fixed end 209 prevents the flow in the direction perpendicular to the longitudinal direction of the lamp housing 200b, that is, the x direction defined in the drawing after the lamp housing 200b is assembled and fastened with the cover bottom 140. It plays a role.

Therefore, one end edge of the first surface 201 of the lamp housing 200b according to the present invention is assembled and fastened through a fixing member (160b of FIG. 3) such as a cover bottom 140 and a screw, The other end edge of the first surface 201 is assembled with the cover bottom 140 through the fixed end 209.

Due to this, both edges of the lamp housing 200b are stably fixed to the cover bottom 140 and at the same time, the lamp housing 200b is provided through a fixing member (160b of FIG. 3) such as a screw at one edge of the first surface 201. Is to ground.

Particularly, since the other end edge of the first surface 201 of the lamp housing 200b is fixed to the cover bottom 140 through the fixing end 209, the other end edge of the first surface 201 of the lamp housing 200b is fixed. There is no need to provide a separate fixing member such as a screw, the process cost is reduced and the processing time is shortened due to eliminating the process time of fastening the fixing member such as a screw.

That is, in order to assemble and fasten the existing first and second lamp housings (21a and 21b of FIG. 1) with the cover bottom (40 of FIG. 1), the respective first and second lamp housings (21a and 21b of FIG. 1). At least one fixing member (60a, 60b, 60c, 60d) such as a screw at both ends of the longitudinal direction of the) had to be assembled and fastened with the cover bottom (40 in FIG. 1).

Therefore, at least four fixing members 60a, 60b, 60c, 60d, such as screws, should be provided, but in the present invention, the other end edges of the first surface 201 of the first and second lamp housings 200a, 200b. By fixing through the fixing end 209, it is possible to remove the screw for assembling and fastening the other end edge of the first surface 201 of the cover bottom 140.

That is, in order to assemble and fasten the lamp housings 200a and 200b according to the present invention to the cover bottom 140, at least two fixing members such as screws (160a and 160b of FIG. 3) are required.

Therefore, the process time is shortened in the process of manually assembling the first and second lamp housings 200a and 200b and the cover bottom 140 by the worker, and by removing the fixing member such as a screw. The process cost is reduced.

At this time, the height (h) of the fixed end 209 is preferably configured so as not to protrude to the back of the cover bottom 140, the height (h) of the fixed end 209 to the outside of the rear cover bottom 140 The longer the height (h) of the fixed end 209 within the limit not exposed, the greater the force restraining the other end edge of the first surface 201 of the lamp housing (200a, 200b) to the cover bottom 140 The other end edges of the first surfaces 201 of the lamp housings 200a and 200b may be stably assembled with the cover bottom 140.

In addition, the width w2 of the fixed end 209 is preferably configured to correspond to the width w1 of the fixing groove 140a.

On the other hand, the fixed end 209 may have various shapes within the configuration that is vertically bent downward in the first surface (201 of FIG. 4) of the lamp housing (200a, 200b).

That is, the position of the fixed end 209 may be vertically bent at one end of the first surface 201 adjacent to the third surface 205, and the fixed end 209 may be formed on the first surface 201 of the drawing. One end of the edge portion is extended vertically bent structure, or one edge of the first surface 201 may be configured by vertically bending all.

FIG. 6 is a schematic cross-sectional view of a portion of FIG. 3 modularized.

As illustrated, the light guide plate 126 seated on the reflective plate 122 and the reflective plate 122 and a plurality of optical sheets 129 are interposed therebetween, and the edges of the support main body 130 have a rectangular frame shape. In this state, the liquid crystal panel 110 including the first and second substrates 112 and 114 bonded to each other with the liquid crystal layer interposed therebetween is supported.

In addition, the cover bottom 140 is coupled to the rear surface thereof, and the top cover 150 surrounding the edge of the liquid crystal panel 110 is coupled to the support main 130 and the cover bottom 140.

In this case, reference numerals denote polarizers 118 attached to outer surfaces of the first and second substrates 112 and 114 of the liquid crystal panel 110.

Here, the lamp 123b is arranged along at least one edge length direction of the light guide plate 126, and the lamp 123b is mounted inside to guide the top, bottom, and outside of the lamp 123b so as to guide the first surface and the outside. A lamp housing 200b further includes a second surface parallel to the first surface and a third surface perpendicular to the first and second surfaces.

At this time, the first surface of the lamp housing (200b) includes a fixed end 209 once the edge is extended and bent vertically downward, the fixed end 209 is a fixing groove 140a of the cover bottom 140 Inserted into

On the other hand, a reflective film 125 having a high reflection efficiency of light may be formed on the inner surface of the lamp housing 200b facing the lamp 123b. The reflective film 125 may be finished by coating an appropriate synthetic resin or the like along the inner surface of the lamp housing 200b or having the end of the corresponding reflective sheet 122 having the same shape as the inner surface of the lamp housing 200b. This may be completed by close contact with the inner surface of the lamp housing (200b).

The reflective film 125 prevents light loss and concentrates the light emitted from the lamp 123b toward the light guide plate 126 as much as possible.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

1 is an exploded perspective view showing a general liquid crystal display module.

FIG. 2 is a schematic cross-sectional view of a portion of FIG. 1 modularized;

3 is an exploded perspective view showing a liquid crystal display module according to an embodiment of the present invention.

4 is a perspective view showing the structure of the lamp housing according to the embodiment of the present invention.

5a to 5b are perspective views showing a part of the back of the cover bottom and the lamp housing;

FIG. 6 is a schematic cross-sectional view of a portion of FIG. 3 modularized;

Claims (11)

A liquid crystal panel; A plurality of optical sheets interposed under the liquid crystal panel; A light guide plate provided below the plurality of optical sheets; A lamp arranged along a longitudinal direction of one edge of the light guide plate; The lamp is mounted therein, and comprises a first surface, a second surface parallel to the first surface, and a third surface perpendicular to the first and second surfaces, the longitudinal direction of the second surface being A lamp housing having a fixed end which is vertically bent toward the rear surface of the second surface; A cover bottom having a fixing groove into which the fixing end is inserted; Top cover assembled with the cover bottom Liquid crystal display module comprising a. The method of claim 1, The fixed end is a liquid crystal display module, characterized in that the height is not exposed to the back of the cover bottom. The method of claim 1, And the width of the fixed end corresponds to the width of the fixing groove of the cover bottom. The method of claim 1, And the lamp is further added to the other edge of the light guide plate. The method of claim 1, And at least two lamps are arranged in multiple layers. With a lamp; The lamp housing is mounted therein and comprises a first surface, a second surface parallel to the first surface, and a third surface perpendicular to the first and second surfaces. And a fixed end bent vertically toward the rear surface of the second surface at one end in the longitudinal direction of the second surface. The method of claim 6, And the second surface has a wider width than the first surface. The method of claim 7, wherein Lamp assembly, characterized in that a hole for inserting the fixing member is formed at the other end of the second surface of the fixed end is formed. The method of claim 6, The lamp assembly, characterized in that the reflective film is formed on the inner surface of the lamp housing. The method of claim 9, The reflective film is a lamp assembly, characterized in that one of a synthetic resin or a reflective sheet. The method of claim 6, The lamp assembly of claim 2, wherein at least two lamps are arranged in multiple layers.

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