KR20060133685A - Liquid crystal display device with back-light unit - Google Patents

Abstract

An LCD is provided to improve the coupling workability between a panel guide and a lower case and prevent the defect due to foreign particles, by forming plural fixing holes and plural fixing protrusions at the panel guide and the lower case, respectively. A panel guide(230) fixes an LCD panel, and has a plurality of first fixing holes(270) and a plurality of fixing protrusions(260). A lower case(240) has a plurality of second fixing protrusions(280) corresponding to the first fixing holes and a plurality of second fixing holes(290) corresponding to the first fixing protrusions. A backlight unit is provided in the lower case. An upper case is configured to cover the LCD panel.

Description

Liquid crystal display with backlight unit {LIQUID CRYSTAL DISPLAY DEVICE WITH BACK-LIGHT UNIT}

1 is a perspective view showing a conventional liquid crystal display device.

FIG. 2 is a cross-sectional view of the liquid crystal display of FIG. 1 taken along line II ′. FIG.

Figure 3a is a view showing a fixing hole and a fixed protrusion formed in the panel guide and the lower case of the first embodiment according to the present invention.

3B is a cross-sectional view of a liquid crystal display according to a first embodiment of the present invention.

Figure 4a is a view showing the step portion and the fixing portion provided in the panel guide and the lower case of the second embodiment according to the present invention.

4B is a sectional view of a second embodiment of a liquid crystal display device according to the present invention;

* Description of the symbols for the main parts of the drawings *

200: liquid crystal panel 210: backlight unit

211: Optical sheet 212: Lamp

213: reflector 220: top case

230: panel guide 240: lower case

260: first fixing protrusion 270: first fixing hole

280: second fixing protrusion 290: second fixing hole

360: fixed portion 370: stepped portion

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device having a backlight unit, and more particularly to a liquid crystal display device having a backlight unit having a plurality of fixing holes and fixing protrusions or a stepped portion and a fixing unit formed in the panel guide and the lower case. will be.

CRT (Cathode Ray Tube), one of the commonly used display elements, is mainly used for monitors such as TVs, measuring devices, and information terminal devices.However, due to the weight and size of CRTs, The company could not actively respond to the demand for miniaturization and weight reduction.

Therefore, in order to replace CRTs in accordance with the trend of miniaturization and light weight of various electronic products, a liquid crystal display (LCD) using an electro-optic effect and a plasma display device (PDP) using gas discharge And researches on the EL display (ELD: Electro Luminescence Display) using the electroluminescent effect is being actively conducted.

Dual LCDs are most widely used because they have better visibility and lower power consumption than CRTs having the same visibility and average power consumption than CRTs.

The liquid crystal display device includes a liquid crystal panel in which liquid crystal cells are arranged in a matrix form between two glass substrates, and a backlight unit for irradiating light to the liquid crystal panel. In addition, in the liquid crystal display, optical sheets for uniformly diffusing light traveling from the backlight unit toward the liquid crystal panel and directing the diffused light are arranged. The liquid crystal panel, the backlight unit, and the optical sheet must be fastened in an integrated form to prevent light loss and must be protected from damage by external impact. To this end, the case is formed to surround the backlight unit and the light sheet including the edge of the liquid crystal panel is provided.

The above-described liquid crystal display device is mounted on a portable information processing device such as a portable computer such as a notebook personal computer and used as a display device. Recently, in order to slim down a portable information processing apparatus, a side mounting method in which a liquid crystal display includes mounting means such as screw grooves on a side (side edge) perpendicular to the display direction and is fixed at the side of the portable information processing apparatus (Side Mounting) System) is mainly used.

1 is a perspective view showing a liquid crystal display device of the prior art, and FIG. 2 is a cross-sectional view of the liquid crystal display device taken along the line II ′ of FIG. 1.

1 and 2, the liquid crystal display device includes a liquid crystal panel 100 for displaying an image, a backlight unit 110 for providing light, and a panel guide 130 for fixing the liquid crystal panel 110. ), A top case 120 protecting the liquid crystal panel 110, and a lower case 140 protecting the backlight unit 110.

The backlight unit 110 may include a lamp 112 that emits light, a reflector 113 that reflects the light projected from the lamp 112 toward the liquid crystal panel 100, and the lamp 112 that is projected from the lamp 112. And optical sheets 111 for uniformly diffusing light and condensing the diffused light.

The panel guide 130 has a bent form and a plurality of screw grooves for fixing are formed, and a plurality of screw grooves are formed on the side surfaces of the lower case 140 corresponding to the screw grooves.

The top case 120 is bent at a right angle to form a rectangular band. The top case 120 surrounds the edge of the liquid crystal panel 100 and the panel guide 130.

As such, the panel guide 130 and the lower case 140 are in close contact with each other, and screw grooves are formed at regular intervals. A screw (Screw) 150 corresponding to the screw groove is fastened to fix the panel guide 130 and the lower case 140.

The conventional liquid crystal display device has difficulty in making the screw grooves coincide with each other in the process of forming the screw groove so as to correspond to a predetermined region of the panel guide 130 and the lower case 140, and the screw 150 When fixing by using the material cost and the fastening of the screw groove and the screw 150 is not easy to fasten when the screw 150 is inclined fastened or clamped in the form of the panel guide 130 and the lower case 140 ) Does not come in close contact. In addition, there is a problem that the foreign matter is generated by friction when the adhesion is not in close contact with the foreign matter visible on the screen.

The present invention provides a plurality of fixing holes and fixing protrusions or stepped portions and fixing portions in the panel guide and the lower case, thereby improving workability when the panel guide and the lower case are fastened, and preventing defects caused by foreign substances. In addition, an object of the present invention is to provide a liquid crystal display device equipped with a backlight unit for easy fastening and dismounting.

In order to achieve the above object, the liquid crystal display device equipped with a backlight unit according to the present invention,

A liquid crystal panel;

A panel guide fixing the liquid crystal panel and having a plurality of first fixing holes and first fixing protrusions;

A lower case having a plurality of first fixing holes and a second fixing protrusion and a second fixing hole corresponding to the first fixing protrusions formed in the panel guide;

A backlight unit provided in the lower case;

And a top case that protects the liquid crystal panel, wherein the second fixing hole is formed in a burring shape.

In addition, another embodiment of the liquid crystal display device equipped with a backlight unit according to the present invention for achieving the above object,

A liquid crystal panel;

A panel guide fixing the liquid crystal panel and having a plurality of stepped portions;

A lower case having a fixing portion corresponding to the stepped portion formed on the panel guide;

A backlight unit deposited on the lower case;

It characterized in that it comprises a top case for protecting the liquid crystal panel.

Also. The fixing portion is characterized in that formed in a curling (curling) shape.

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

3A is a view illustrating a fixing hole and a fixing protrusion formed in the panel guide and the lower case of the liquid crystal display according to the first embodiment of the present invention.

As shown in FIG. 3A, a plurality of first fixing holes 270 and a plurality of first fixing protrusions 260 are formed at outer side surfaces of the panel guide 230, respectively.

On the other hand, a plurality of second fixing protrusions 280 and a plurality of second fixing holes 290 are formed on the outer side of each side of the lower case 240.

The second fixing hole 290 is characterized in that it is formed in a burring (Burring) shape that can prevent the generation of foreign matters by friction after the panel guide 230 and the lower case 240 is fastened.

3B is a cross-sectional view of a liquid crystal display according to a first embodiment of the present invention.

As shown in FIG. 3B, the LCD according to the present invention includes a liquid crystal panel 200 for displaying an image, a panel guide 230 for fixing the liquid crystal panel 200, and a liquid crystal panel 200. A top case 220 to protect and a lower case 240 to protect the backlight unit 210 is included.

In addition, the lower case 240 has a side wall surface thereof formed as a stepped stepped surface. The backlight unit 210 provided in the lower case 240 includes a reflector 213 that reflects light onto the lowest layer and projects the light toward the liquid crystal panel 200, and is provided on the reflector 213 to generate light. And a plurality of lamps 212 and optical sheets 211 provided on the lamps 212 and diffusing and condensing the light generated by the lamps 212 and the light reflected by the reflecting plate 213.

A plurality of first fixing holes 270 and a plurality of first fixing protrusions 260 are formed at regular intervals on the outer surface of each side of the panel guide 230 at regular intervals.

On the other hand, the plurality of second fixing protrusions 280 and the plurality of second fixing holes 290 are formed at regular intervals on the outer side of each side of the lower case 240 at regular intervals.

The second fixing hole 290 is characterized in that formed in a semi-circular burring (Burring) shape that can prevent the generation of foreign matters by friction after the panel guide 230 and the lower case 240 is fastened.

In the method of assembling the liquid crystal display device according to the first embodiment of the present invention, first, the optical sheets 211 are sequentially stacked on the lower case 240. Then, the first fixing hole 270 and the second fixing protrusion 280 of the panel guide 230 and the lower case 240 face each other, and the second fixing hole 290 and the first fixing protrusion 260 are disposed. Face to face. Subsequently, the panel guide 230 is pushed downward to be fastened.

The fastening of the first fixing hole 270 and the second fixing protrusion 280 prevents separation of the panel guide 230 and the lower case 240 by external forces above and below the liquid crystal display. The fastening of the second fixing hole 290 and the first fixing protrusion 260 serves to prevent separation of the panel guide 230 and the lower case 240 by external forces on the left and right sides of the liquid crystal display.

4A is a view showing a step portion and a fixing portion provided in the panel guide and the lower case of the second display device according to the present invention.

As shown in FIG. 4A, in the liquid crystal display according to the present invention, a plurality of stepped portions 370 are formed at outer side surfaces of the panel guide 330.

On the other hand, a plurality of fixing parts 360 are formed on the upper sides of the lower case 340.

Here, the fixing portion 360 has a predetermined elasticity so that it can be fastened even with a small pressure of the operator.

In addition, the fixing part 360 is characterized in that it is formed in a curling (Curling) shape that can prevent the generation of foreign matters by friction after the panel guide 330 and the lower case 340 is fastened.

4B is a sectional view showing the second embodiment of the liquid crystal display according to the present invention.

As shown in FIG. 4B, the LCD according to the present invention includes a liquid crystal panel 330 for displaying an image, a panel guide 330 for fixing the liquid crystal panel 330, and a liquid crystal panel 300. It includes a top case 320 for protecting and a lower case 340 for protecting the backlight unit 310.

In addition, the lower case 340 has a side wall surface formed in a stepped shape. The backlight unit 310 provided inside the lower case 340 is provided with a reflector 313 for reflecting light onto the lowest layer and projecting the light toward the liquid crystal panel 300, and is provided on the reflector 313 to generate light. And a plurality of lamps 312 and optical sheets 311 provided on the lamps 312 and diffusing and condensing the light generated by the lamps 312 and the light reflected by the reflector 313.

A plurality of stepped portions 370 are formed at each side of the panel guide 330 at regular intervals.

On the other hand, a plurality of fixing parts 360 are formed at regular intervals on each side of the lower case 340.

Here, the fixing part 360 has a predetermined elasticity to be fastened even by a small pressure of the operator.

In addition, the fixing part 360 is characterized in that it is formed in a curling (Curling) shape of the semi-circular protrusions that can prevent the generation of foreign matters by friction after the panel guide 330 and the lower case 340 is fastened.

In the method of assembling the liquid crystal display device according to the second embodiment of the present invention, first, the optical sheets 311 are sequentially stacked on the lower case 340, and the panel guide 330 and the lower case 340 are sequentially stacked. ) Faces the stepped portion 370 and the fixed portion 360. Then, the panel guide 330 is pressed down to fasten.

The step portion 370 and the fixing portion 360 are fastened by elasticity to prevent separation by external forces of the panel guide 330 and the lower case 340.

Therefore, the liquid crystal display according to the embodiment of the present invention improves workability by reducing the material cost when the panel guides 230 and 330 and the lower cases 240 and 340 are fastened. You can do

As described above, the present invention forms a plurality of fixing holes and fixing protrusions or stepped portions and fixing portions in the panel guide and the lower case, thereby reducing material costs and preventing defects caused by foreign substances.

Those skilled in the art through the above description will be capable of various changes and modifications without departing from the spirit of the present invention.

Claims (11)

A liquid crystal panel; A panel guide fixing the liquid crystal panel and having a plurality of first fixing holes and first fixing protrusions; A lower case having a plurality of first fixing holes and a second fixing protrusion and a second fixing hole corresponding to the first fixing protrusions formed in the panel guide; A backlight unit provided in the lower case; And a top case that protects the liquid crystal panel. The method of claim 1, And the second fixing hole has a burring shape. The method of claim 1, And a first fixing hole and a second fixing protrusion corresponding to each other. The method of claim 1, And a second fixing hole and a first fixing protrusion corresponding to each other. The method of claim 1, And a first fixing hole and a first fixing protrusion of the panel guide formed at regular intervals on each side thereof. The method of claim 1, And a second fixing protrusion and a second fixing hole of the lower case are formed at regular intervals on each side thereof. A liquid crystal panel; A panel guide fixing the liquid crystal panel and having a plurality of stepped portions; A lower case having a fixing portion corresponding to the stepped portion formed on the panel guide; A backlight unit deposited on the lower case; And a top case that protects the liquid crystal panel. The method of claim 7, wherein And the fixing part is formed in a curling shape. The method of claim 7, wherein And a stepped part and a fixed part correspondingly fixed to each other. The method of claim 7, wherein And a stepped portion of the panel guide is formed on each side at regular intervals. The method of claim 7, wherein And a fixing part of the lower case is formed at regular intervals on each side thereof.

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