KR101033095B1 - Lamp holding device and Liquid Crystal Display having the same - Google Patents

Abstract

Disclosed are a lamp fixing device and a liquid crystal display device having the same, which can improve luminance and reduce manufacturing costs.

The lamp fixing device of the present invention includes a lamp support plate having lamp fixing portions for fixing a plurality of lamps, a cover bottom having an opening groove corresponding to an area of the lamp support plate, and fixing between the lamp support plate and the cover bottom. And a plurality of fixing means for reflecting the light of the lamps and attached to an upper portion of the cover bottom and having an opening groove corresponding to the opening groove.

Reflector, Lamp Support Plate, Diffuser Plate, Aperture Groove

Description

Lamp holding device and liquid crystal display having same {Lamp holding device and Liquid Crystal Display having the same}

1 is a perspective view showing a backlight of a general direct method.

2A and 2B are diagrams illustrating a lamp support plate in the liquid crystal display according to the exemplary embodiment of the present invention.

3 is a view for explaining a state in which the lamp support plate of Figures 2a and 2b is fixed to the cover bottom.

4 is a view showing a cover bottom provided with a lamp support plate according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view of the lamp guide of FIG. 4 taken along a-a 'direction. FIG.

6 is a cross-sectional view taken along line b ′ and b ′ of FIG. 4.

Description of the Related Art [0002]

107: reflector plate 108: lamp support plate

111: support 112: government

118: cover bottom 119: opening groove

120: screw

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display, and more particularly, to a liquid crystal display which reduces assembly time and requirements by using a lamp guide integrated into one.

Recently, there is a need for a flat panel display device having excellent characteristics such as thinning, weight reduction, and low power consumption. The flat panel display includes a liquid crystal display (LCD), an electroluminescent display (ELD), a field emission display (FED), a plasma display (PDP), and the like. Liquid crystal display devices (Liquid Crystal Display device) is excellent in resolution, color display, image quality, etc. are actively applied to notebooks and desktop monitors.

In the liquid crystal display, two substrates on which electrodes are formed are disposed so that the surfaces on which the two electrodes are formed face each other, a liquid crystal material is injected between the two substrates, and an electric field generated by applying a voltage to the two electrodes. It is an apparatus which expresses an image by the transmittance | permeability of light which changes accordingly by displacing a liquid crystal molecule.

In general, a backlight used as a light source of a liquid crystal display is divided into an edge type and a direct type.

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

The direct method was developed as the liquid crystal display device began to be enlarged, and a plurality of lamps were arranged in a row on the lower surface of the diffuser plate to direct light directly to the front of the liquid crystal panel. Such a direct type is mainly used in a large screen liquid crystal display which requires high luminance because the light efficiency is higher than that of the edge type.

1 is a perspective view showing a general direct backlight.

As shown in FIG. 1, the backlight includes a plurality of fluorescent lamps 1 having a phosphor coated on an inner surface thereof to emit light, a cover bottom 3 for fixing and supporting the fluorescent lamps 1, and Light scattering means 5a, 5a, 5c disposed between the fluorescent lamp 1 and the liquid crystal panel (not shown). The light scattering means 5a, 5b and 5c are for preventing the shape of the fluorescent lamp 1 from appearing on the surface of the liquid crystal panel and improving the light source having a uniform brightness distribution as a whole. To this end, a plurality of diffusion sheets 5b and 5c, a diffusion plate 5a, and the like are disposed between the liquid crystal panels.

On the inner surface of the cover bottom 3, a reflecting plate 7 capable of reflecting the light generated from the fluorescent lamp 1 to the display portion of the liquid crystal panel is disposed, which is configured to increase the utilization efficiency of the light. Both electrodes (not shown) of the fluorescent lamp 1 have electrode connection lines 9a and 9b to which an external power source for driving the lamp is applied.

The fluorescent lamp 1 is gradually enlarged as the area of the liquid crystal panel (not shown) is enlarged. This causes the fluorescent lamp 1 to fall down due to gravity. The portion where the fluorescent lamp 1 is struck becomes narrower than the reflecting plate 7, so that the amount of reflecting light emitted from the fluorescent lamp 1 varies. This causes a difference in luminance in the liquid crystal display.

SUMMARY OF THE INVENTION An object of the present invention is to provide a lamp fixing device having a lamp support plate for fixing a lamp and preventing a lamp drooping phenomenon and a liquid crystal display device having the same.

According to an embodiment of the present invention for achieving the above object, the lamp fixing device of the present invention has a lamp support plate having a lamp fixing portion for fixing a plurality of lamps, and an opening groove corresponding to the area of the lamp support plate A cover bottom, a plurality of fixing means for fixing the lamp support plate and the cover bottom, and a reflecting plate reflecting light of the lamps and attached to an upper portion of the cover bottom and having an opening groove corresponding to the opening groove. do.

According to another embodiment of the present invention for achieving the above object, the liquid crystal display of the present invention is a lamp support plate having a plurality of lamp fixing parts for fixing a plurality of lamps, and the lamp support plate for mounting the lamp support plate And a cover bottom having an opening groove corresponding to an area of the light source, an optical sheet disposed on the lamp support plate, and a liquid crystal panel disposed on the optical sheet.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention.

2A and 2B are diagrams illustrating a lamp supporting plate in the liquid crystal display according to the exemplary embodiment of the present invention.

As shown in FIGS. 2A and 2B, the lamp support plate 8 is laminated on the guide 10, the lamp fixing part 12 for fixing the lamp, and the guide 10 of the lamp support plate 8. And a support 11 for supporting the diffuser plate. The lamp fixing part 12 and the support base 11 are formed on the guide 10 of the lamp support plate 8. A pair of lamps are fixed to the lamp holder 12 and the lamp support plate 8 has the lamp support plate holder 15 for fixing to the diffuser plate. The lamp support plate 8 is fixed on a reflector plate (not shown) attached inside the cover bottom (not shown).

The lamp support plate fixing part 15 connected to the support 11 is formed under the lamp support plate 10, and the lamp support plate fixing part 15 is inserted into a groove formed in the cover bottom. A protrusion 14 is formed on the lamp support plate fixing part 15 to fix the cover bottom.

3 is a view for explaining a state in which the lamp support plate of Figures 2a and 2b is fixed to the cover bottom.

As shown in FIG. 3, a plurality of lamp support plates 8 are fixed on the cover bottom 18. First and second holes 16 and 17 are formed on the cover bottom 18 to fix the lamp support plate 8. A reflection plate (not shown) is attached to an inner surface of the cover bottom 18.

The first hole 16 into which the lamp support plate fixing part 15 is inserted and the second hole 17 to fix the protrusion 14 provided in the lamp support plate fixing part 15 on the cover bottom 18. ) Is formed.

The reflective plate (not shown) is attached to the cover bottom 18. After the lamp support plate 8 is inserted into the first hole 16, the lamp support plate 8 is rotated. In this case, the protrusion 14 provided in the lamp support plate fixing part 15 is inserted into the second hole 17 to fix the lamp support plate 8 on the cover bottom 18. Here, the lamp support plate 8 may be formed in a row on the cover bottom 18, or may be formed in a zigzag form. As described above, a plurality of lamp support plates 8 may be formed on the cover bottom 18.

However, as the backlight becomes larger in size, the number of lamp support plates 8 for fixing the lamp also increases. As the number of lamp support plates 8 increases, the cost of manufacturing the lamp support plates 8 also increases. The lamp support plate 8 is made of a easily broken material such as plastic, so that the lamp support plate 8 is easily broken when being separated from the lamp to recycle the lamp support plate 8. This increases the manufacturing cost of the lamp support plate (8).

4 is a view showing a cover bottom provided with a lamp support plate according to another embodiment of the present invention.

As shown in FIG. 4, a lamp support plate 108 for fixing a lamp (not shown) at predetermined intervals is inserted into the opening groove 119 formed on the cover bottom 118, and the cover bottom 118 is inserted. ), A reflecting plate 107 having an opening hole corresponding to the area of the opening groove 119 is attached. Screws 120 are used to secure the cover bottom 118 and the lamp support plate 108.

The cover bottom 118 is formed to include an opening groove 119 to be less affected by vibration or external impact.                     

The opening groove 119 is formed at a predetermined depth in the lower direction of the cover bottom 118. In this case, the opening groove 119 has an upper surface of the lamp guide 110 inserted into the opening groove 119 and an upper surface of the reflective plate 107 stacked on the cover bottom 118 on the same line. Form so that it is located in.

The reflection plate 107 is formed with an opening hole corresponding to the opening groove 119. The reflective plate 107 is positioned to correspond to the opening groove 119 and the opening hole, and then is attached on the cover bottom 118.

The screw 120 serves to fix the opening groove 119 formed on the cover bottom 118 and the lamp support plate 108 inserted into the opening groove 119.

In this case, a portion where the lamp support plate 108 and the cover bottom 118 are fastened is screwed by the screw 120. In addition, the screw 120 penetrates into the lamp support plate 108 to fix the cover bottom 118 and the lamp support plate 108.

FIG. 5 is a cross-sectional view of the lamp support plate of FIG. 4 taken along a-a 'direction. FIG.

As shown in FIG. 5, the lamp support plate 108 includes a plurality of lamp fixing parts 112 for fixing a plurality of lamps and a support 111 for supporting a diffusion plate (not shown). The lamp support plate 108 is formed to be inserted therein on the opening groove 119. As mentioned above, the opening groove 119 is formed to be recessed by a predetermined depth on the cover bottom 118. The lamp fixing part 112 may be further added to the lamp support plate 108 to fix the lamp according to the number of lamps. That is, the lamp support plate 108 is formed in a unitary structure including a plurality of the lamp fixing part 112.

The lamp support plate 108 having a single structure shape is inserted into the opening groove 119 formed on the cover bottom 118. In this case, the opening groove 119 has a shape that is elongated in the vertical direction on the cover bottom 118. The opening groove 119 is formed on the cover bottom 118 to be equal to the number of the lamp support plates 110.

The lamp support plate 108 may be increased by a predetermined number in order to fix the lamp which is getting larger in size in response to an increasingly larger liquid crystal display device. As the lamp becomes larger in size, a phenomenon of falling down due to gravity may occur. In this case, the lamp is fixed by using the plurality of lamp support plates 108 having a single structure so that the lamp, which is enlarged due to gravity, does not fall.

The lamp support plate 108 is inserted into the opening groove 119 formed on the cover bottom 118 by forming a plurality of the lamp support plates 108 having the unitary structure to fix the lamp.

The lamp support plate 108 having the unitary structure may only need to add a lamp fixing part 112 to fix the lamp on the lamp support plate 108 as the number of lamps increases. Accordingly, as the number of lamps increases, the time and cost required to manufacture each lamp support plate and the number of lamp support plates can be reduced.

6 is a cross-sectional view taken along line b ′ and b ′ of FIG. 4.                     

As shown in FIG. 6, the cover bottom 118 includes the opening groove 119 having a hollow shape to a predetermined depth. The lamp includes a reflector plate 107 having an opening hole corresponding to the opening groove 119 on the cover bottom 118, and including a lamp fixing part for fixing the lamp into the opening groove 119. The support plate 108 is inserted. The lamp support plate 108 and the opening groove 119 formed on the cover bottom 118 are fastened using the screw 120.

The opening groove 119 is formed on the cover bottom 118, and an upper surface of the lamp support plate 108 inserted into the opening groove 119 and the reflection plate attached to the cover bottom 118. The upper surface of 107 forms the same line.

As the upper surface of the lamp support plate 108 and the upper surface of the reflecting plate 107 form the same line, the luminance is improved.

For example, when the lamp support plate 108 is formed on the reflector plate 107, a portion where the gap between the diffuser plate (not shown) stacked on the lamp support plate 108 and the reflector plate 107 is narrow is a liquid crystal panel. Dark on the image.

The lamp support plate 108 is attached to the reflector plate 107, and the light emitted from a lamp (not shown) fixed to the lamp support plate 108 is reflected through the reflector plate 107, so that the lamp support plate 108 is fixed. Move to the diffusion plate laminated on the). At this time, the portion where the lamp support plate 108 is formed on the reflecting plate 107 is narrowed. As such, the narrowed portion between the diffuser plate and the reflector plate 107 appears dark on the liquid crystal panel (not shown). The reason for this is that the amount of reflection varies in the portion where the lamp support plate 108 is positioned above the reflector plate 107.

As a result, the narrowed portion between the diffuser plate and the reflector plate 107 appears dark on the liquid crystal panel, causing a difference in luminance.

Therefore, an opening groove 119 having a predetermined depth is formed on the cover bottom 118, and a reflective plate 107 having an opening corresponding to the opening groove 119 is attached to the cover bottom 118. Let's do it. The lamp support plate 108 is inserted into the opening groove 119 formed on the cover bottom 118. Accordingly, the upper surface of the reflector plate 107 and the upper surface of the lamp support plate 108 form the same line.

Accordingly, the distance between the diffuser plate and the reflector plate 107 stacked on the lamp support plate 108 becomes equal. As a result, the light emitted from the lamp fixed to the lamp support plate 108 moves to the diffuser plate through the reflector plate 107. At this time, the amount of reflection of the light moved to the diffusion plate is the same. As a result, the darker portion on the liquid crystal panel is removed, thereby improving the luminance.

As described above, the reflecting plate having an opening hole corresponding to the opening groove is attached to the opening groove formed at a predetermined depth on the cover bottom, and the lamp support plate for fixing the lamp is inserted into the opening groove. The upper surface of the reflecting plate and the upper surface of the lamp support plate form the same line. As a result, the distance between the diffuser plate and the reflector plate stacked on the lamp support plate is the same, so that the darker portions generated when the reflector plate and the diffuser plate are narrow on the liquid crystal panel are removed, thereby improving luminance.

The lamp support plate means that the lamp support plate is made of a single structure while increasing the lamp fixing portion for fixing the lamp according to the number of lamps.

Therefore, as the number of lamps increases, by increasing the lamp fixing portion for fixing the lamp to the lamp support plate having a single structure without increasing the lamp support plate, assembly is simplified, assembly time and manufacturing cost can be reduced. have.

As described above, the liquid crystal display device of the present invention is to add a lamp fixing part for fixing the lamp as the number of lamps increases to the lamp support plate of a single structure, to simplify the assembly, and to manufacture a lamp support plate The cost can be reduced, and the brightness can be improved as the upper surface of the lamp support plate and the upper surface of the reflecting plate form the same line.

Claims (11)

A lamp support plate having lamp fixing portions for fixing a plurality of lamps; A cover bottom having an opening groove corresponding to an area of the lamp support plate; A plurality of fixing means for fixing between the lamp support plate and the cover bottom; And And a reflecting plate reflecting light of the lamps and attached to an upper portion of the cover bottom and having an opening hole corresponding to the opening groove. The method of claim 1, And the opening groove is formed such that an upper surface of the reflecting plate and an upper surface of the lamp supporting plate are positioned on the same line. The method of claim 1, And the fixing means is a screw. The method of claim 1, And the lamp support plate is mounted in the opening groove of the cover bottom through the opening of the reflecting plate. The method of claim 1, Lamp fixing device characterized in that provided with at least two lamp support plate. A lamp support plate having a plurality of lamp fixing portions for fixing the plurality of lamps; A cover bottom having an opening groove corresponding to an area of the lamp support plate to seat the lamp support plate; An optical sheet disposed on the lamp support plate; A plurality of fixing means for fixing between the lamp support plate and the cover bottom; And And a liquid crystal panel disposed on the optical sheet. The method of claim 6, And the fixing means is a screw. The method of claim 6, And a reflecting plate reflecting light of the lamps and attached to an upper portion of the cover bottom and having an opening hole corresponding to the opening groove, and through which the lamp support plate is seated in the opening groove of the cover bottom. Liquid crystal display device characterized in that. The method of claim 6, The lamp support plate further comprises a plurality of support for supporting the optical sheet. The method of claim 6, And the opening groove is formed such that an upper surface of the reflecting plate attached to the cover bottom and an upper surface of the lamp supporting plate are positioned on the same line. The method of claim 6, And at least two lamp support plates.

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