KR101570241B1 - Liquid crystal display device - Google Patents

Abstract

A liquid crystal display device capable of preventing noise generation is disclosed.

The liquid crystal display device of the present invention includes a bottom cover having an opened upper surface, a support main body accommodated in the bottom cover, a top case surrounding the edge of the support main body and surrounding the edge of the liquid crystal display panel, And a plurality of second protrusions protruding from the outer surface of the bottom case and contacting the inner surface of the bottom cover, and a plurality of second protrusions protruding in the inner surface direction of the top case and contacting the outer edge of the support main.

Description

[0001] LIQUID CRYSTAL DISPLAY DEVICE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of preventing noise from occurring.

A CRT (cathode ray tube), which is one of the widely used display devices, is mainly used for monitors such as a TV, a measurement device, and an information terminal device. However, due to the weight and size of the CRT itself, Could not respond positively to the response of

As a solution to such a problem, the liquid crystal display device has been gradually widened due to its features such as lightness, thinness, and low power consumption driving. Accordingly, the liquid crystal display device is proceeding in the direction of large-sized, thin, and low power consumption in response to the demand of the user.

2. Description of the Related Art [0002] A liquid crystal display device is a display device that displays an image by adjusting the amount of light transmitted through a liquid crystal, and is widely used because of its advantages such as thinness and low power consumption.

Unlike a CRT, the liquid crystal display device is not a self-luminous display device. Therefore, a backlight unit including a separate light source for providing light for visually expressing an image is provided on a back surface of the liquid crystal display panel.

The backlight unit has a structure in which a light source unit is disposed on an inner side surface of a bottom cover made of a metal material, and a reflective sheet, a light guide plate, and optical sheets are sequentially placed inside the bottom cover.

The backlight unit further includes a square main support main body surrounding the light source unit, the reflection sheet, the light guide plate, and the optical sheets.

In a typical liquid crystal display device, the support main and bottom covers are assembled in a hook structure, and the top case and the bottom cover surrounding the outer surface of the liquid crystal display panel are assembled in a hook structure, resulting in a finished liquid crystal display module ratio.

However, even if the support main body, the bottom cover, and the top case are fixed by using the hook structure, the general liquid crystal display device generates a clearance between the respective components due to the fixing structure (hook structure) There was a problem that noise was generated.

An object of the present invention is to provide a liquid crystal display device capable of preventing noise from occurring.

According to an embodiment of the present invention,

A bottom cover having an opened upper surface; A support main housed in the bottom cover; A top case surrounding the edge of the support main body and surrounding the edge of the liquid crystal display panel; A plurality of first protrusions protruding from an outer surface of the support main body and contacting the inner surface of the bottom cover; And a plurality of second protrusions protruding in an inner surface direction of the top case and contacting the outer edge of the support main body.

The present invention can prevent the flow of the support main by the clearance between the support main and bottom cover by forming a plurality of first projections on the side surface of the support main.

In the liquid crystal display device of the present invention, a plurality of second projections are formed on the inner surface of the edge of the top case to prevent the flow of the support main by the gap between the top case and the support main.

Therefore, according to the present invention, first and second protrusions are formed between the support main body, the bottom cover, and the top case, thereby preventing the generation of noise due to the clearance.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, embodiments of the present invention will be described in detail.

FIG. 1 is an exploded perspective view illustrating a liquid crystal display device according to an embodiment of the present invention. FIG. 2 is a view showing area A of the top case of FIG. 1, and FIG. FIG.

4 is a cross-sectional view illustrating a liquid crystal display device cut along the line I-I 'of FIG.

1 to 4, a liquid crystal display according to an exemplary embodiment of the present invention includes a liquid crystal display panel 110 on which an image is displayed, a liquid crystal display panel 110 disposed below the liquid crystal display panel 110, And a top case 100 which surrounds the upper edge of the liquid crystal display panel 110 and is fixed to the backlight unit 120.

Although not shown in detail, the liquid crystal display panel 110 includes a thin film transistor (TFT) substrate and a color filter substrate bonded together to maintain a uniform cell gap, and a liquid crystal layer . In the thin film transistor substrate, a plurality of gate lines are formed, a plurality of data lines intersecting the plurality of gate lines are formed, and a thin film transistor (TFT) is formed in a crossing region between the gate lines and the data lines.

A gate driving printed circuit board (PCB) 111 for supplying a scan signal to the gate line, a data driving PCB (data driving PCB) 113 for supplying a data signal to the data line, .

The gate and data driving PCBs 113 and 115 are electrically connected to the liquid crystal display panel 110 by a chip on film (COF) 115. Here, the COF 115 may be changed to a TCP (Tape Carrier Package).

The backlight unit 120 includes a bottom cover 180 having an open upper surface and a light source 150 disposed on an inner side surface of the bottom cover 180. The light source 150 is disposed in parallel with the light source 150 A light guide plate 160 that converts light incident from the light source 150 into surface light; optical sheets 130 that are disposed on the light guide plate 160 to condense and diffuse light; And a reflective sheet 170 for reflecting light emitted from the light guide plate 160 and guiding the light to the liquid crystal display panel 110.

The backlight unit 120 surrounds the light source 150, the light guide plate 160, the optical sheets 130 and the reflective cover 170. The backlight unit 120 includes a support main 140 fixed to the side surface of the bottom cover 180 .

Although the light guide plate 160 is made of PMMA (poly methly methacrylate) material and is not shown in detail in the drawings, the light guide plate 160 may have a wedge shape that becomes thinner as the distance from the incident surface on which the light source 150 is disposed is reduced. A prism pattern for refracting incident light toward the optical sheets 130 may be formed on the back surface of the light guide plate 160.

The optical sheets 130 include a diffusion sheet for diffusing light, a light collecting sheet for condensing light, and a protective sheet for protecting the light converging sheet.

Although not shown in the drawing, a lamp or a light emitting diode is used as the light source 150, and a guide unit (not shown) for guiding light emitted from the light source 150 toward the light guide plate 160 is provided to surround the light source 150 (Not shown).

The support main body 140 is made of a molding material in the shape of a square frame, and the outer side is joined to the bottom cover 180. Although not shown in detail in the drawings, the support main 140 and the bottom cover 180 are combined in a hook structure.

A plurality of first protrusions 141 are formed on the outer surface of the support main body 140 at regular intervals.

The plurality of first projections 141 have a function to compensate for the clearance generated by the coupling structure (hook structure) when the bottom cover 180 and the support main 140 are engaged.
That is, the first protrusion 141 formed on the outer surface of the support main body 140 is formed in the gap area generated between the outer surface of the support main body 140 and the inner surface of the bottom cover 180, To prevent defective flow of the support main 140 caused by the gap.

The outer surface of the plurality of first protrusions 141 is in contact with the inner surface of the bottom cover 180, and the height of the plurality of first protrusions 141 is preferably approximately 0.1 mm.

The plurality of first protrusions 141 are integrally formed in the manufacturing process of the support main body 140, and the number of the first protrusions 141 can be changed as much as possible.

The top case 100 surrounds the outer surface of the bottom cover 180 and surrounds the upper surface and the edge of the support main 140. In addition, the top case 100 has a structure to cover the upper edge of the liquid crystal display panel 110.
The second protrusion 103 formed on the inner surface of the top case 100 as in the case of the first protrusion 141 of the support main body 140 is formed in the gap region between the top case 100 and the support main body 140, And contacts the support main body 140 to prevent the support main body 140 from flowing.

A plurality of second protrusions 103 protruding inwardly at a predetermined interval from the inner surface of the top case 100 to prevent the support main 140 from flowing in contact with the outer surface of the support main 140, .

The plurality of second protrusions 103 are formed in the manufacturing process of the top case 100 and are formed in a mountain shape inward from the edge of the top case 100. Therefore, a groove 101 is formed outside the edge of the top case 100 in a region corresponding to the second protrusion 103.

The shape of the groove 101 may vary depending on the degree of protrusion of the second protrusion 103. The shape of the groove 101 may vary depending on the degree of protrusion of the second protrusion 103. [ The second protrusion 103 of the present invention is for preventing the flow of the support main 140 by contacting the edge of the support main 140 and has a height of about 0.1 mm protruding from the edge of the top case 100 desirable.

The plurality of second protrusions 103 are integrally formed at the time of manufacturing the top case 100, and the amount of the second protrusions 103 can be changed as much as possible.

The present invention is limited to the structure in which the square protrusion 141 protruding from the side surface of the support main body 140 and the second protrusion 103 protruding from the inner surface of the edge of the top case 100 are formed The shape of the first and second protrusions 141 and 103 may be changed in any way.

The liquid crystal display according to an embodiment of the present invention described above has a plurality of first protrusions 141 formed on a side surface of the support main 140 to support the support main 140 and the bottom cover 180 The flow of the main 140 can be prevented.

The liquid crystal display of the present invention has a plurality of second projections 103 formed on the inner surface of the edge of the top case 100 so that the support main 140 Can be prevented.

That is, according to the present invention, the first and second protrusions 141 and 103 are formed between the support main body 140, the bottom cover 180, and the top case 100 to prevent generation of noises due to the clearance.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

1 is an exploded perspective view illustrating a liquid crystal display device according to an embodiment of the present invention.

Fig. 2 is a view showing area A of the top case of Fig. 1; Fig.

3 is a view showing the inside of the top case of Fig.

4 is a cross-sectional view illustrating a liquid crystal display device cut along the line I-I 'of FIG.

Claims (5)

A bottom cover having an opened upper surface; A support main housed in the bottom cover; A top case surrounding the edge of the support main body and surrounding the edge of the liquid crystal display panel; A plurality of first protrusions protruding from an outer surface of the support main body and contacting the inner surface of the bottom cover; And And a plurality of second protrusions protruding in an inner surface direction of the top case and contacting the outer edge of the support main, And a groove is formed on an outer side of the top case corresponding to the second projection so as to be symmetrical with the second projection. The method according to claim 1, Wherein the first protrusions protrude in a direction of an outer surface of the support main body in a rectangular shape. delete The method according to claim 1, And the protruding height of the first protrusion is 0.1 mm. The method according to claim 1, And the protruded height of the second protrusion is 0.1 mm.

Images