KR100972937B1 - Liquid crystal display device - Google Patents

Abstract

The present invention discloses a liquid crystal display device which can simplify the ultra-light weight and assembly process of the liquid crystal display device by using a main frame, a lower cover, and a reflecting plate instead of a lamp housing for fixing the lamp in the liquid crystal display device. According to an aspect of the present invention, there is provided a liquid crystal display device including a main assembly, a lower cover, and an upper case, the backlight assembly including optical sheets, a light guide plate, a lamp, and a reflecting plate of the liquid crystal display device, the lower cover being coupled to the main frame; The reflective plate inserted between the lower cover and the light guide plate is coupled to the main frame in a structure in which both edges are vertically bent.

Here, the reflecting plate has a structure extending to the bent lower cover edge region, the light guide plate is fixed by the lower cover and the reflecting plate is bent with the main frame, the lamp is bent with the main frame It is characterized by being fixed by a cover and a reflecting plate.

High reflectivity, main frame, liquid crystal display, lamp housing, reflector

Description

[0001] LIQUID CRYSTAL DISPLAY DEVICE [0002]

1 is an exploded perspective view of an assembly structure of a liquid crystal display generally.

2 is a cross-sectional view showing a lamp area of the liquid crystal display according to the prior art.

3 is a view showing a lamp area of the liquid crystal display according to the present invention.

4 is a view according to another embodiment of the present invention.

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

101: upper case 105: liquid crystal panel

110: backlight assembly 111: optical sheet

113: lamp 115: light guide plate

117: reflector 121: main frame

122: lower cover

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 which can reduce the thickness and the number of components by reducing the main frame or the reflecting plate in the lamp area of the liquid crystal display device.                         

Recently, due to the rapid development of technology in the semiconductor industry, liquid crystal display devices are being manufactured with smaller and lighter weight and more powerful products. Cathode ray tube (CRT), which is widely used in information display devices, has many advantages in terms of performance and price, but has many disadvantages in terms of miniaturization or portability.

On the other hand, liquid crystal displays have been attracting attention as an alternative means of overcoming the shortcomings of CRTs because they have advantages such as miniaturization, light weight, and low power consumption. Currently, almost all information processing devices that require display devices are required. The situation is attached to.

Such liquid crystal displays generally apply voltages to specific molecular arrays of liquid crystals to convert them into other molecular arrays, and change optical properties such as birefringence, photoreactivity, dichroism, and light scattering characteristics of liquid crystal cells that emit light by such molecular arrays. Is a display device using modulation of light by a liquid crystal cell by converting the light into a visual change.

Recently, various structures have been developed for slimming and lightening in order to secure the competitiveness of the product. One of them stacks and combines the backlight assemblies, which are optical units, on the liquid crystal display panel in which the array substrate and the color filter substrate are bonded together, and inserts them into the main frame to protect them. A display mold frame structure is fabricated.

The PCB for applying a signal to the gate pad and the data pad formed at the edge of the display panel is connected with the flexible cable by TCP to which the drive IC is bonded, and is attached to the rear surface of the main frame of the liquid crystal display.

1 is an exploded perspective view of an assembly structure of a liquid crystal display generally.

As shown in FIG. 1, the backlight assembly is connected to a liquid crystal panel 5 in which an array substrate having a plurality of pixels in a matrix form and a color filter substrate in which R, G, and B color filters are formed in a matrix form are bonded together. It is stacked and stored in the main frame.

A gate printed circuit board (PCB) 7 for applying a driving signal is provided at one edge of the liquid crystal panel 5 with a gate pad of the liquid crystal panel 5 interposed between the gate pad and a gated taper package (TCP). It is connected by a (flexible cable).

Similarly, a data printed circuit board (PCB) 9 for applying a graphic signal to the other edge of the liquid crystal panel 5 is connected to a data pad of the liquid crystal display panel 5 by a flexible cable. Data TCP is attached to apply a signal to the liquid crystal panel 5 according to a certain scanning method.

Under the liquid crystal panel 5, a plurality of optical sheets 11 and a lamp 13 for generating light for expressing an image, and light generated from the lamp 13 is a plane light of the area of the liquid crystal panel 5. The backlight assembly 10 including the light guide plate 15 to be replaced with the light reflection plate 17 for reflecting the light leaked from the light guide plate 15 and increasing the light efficiency is attached in a stacked form.

The backlight assembly 10 and the liquid crystal panel 5 are inserted in a stacked form on the main frame 21 for optical alignment while protecting from external shock. In order to prevent movement of the liquid crystal panel 5, a guide panel 3 capable of fixing the liquid crystal panel 5 is attached.

The main frame 21 is divided into a metal material or a plastic material, and the liquid crystal panel 5 and the backlight assembly 10 are inserted into the main frame 21 in a stacked form, and then the panel The guide 3 is coupled to the main frame 21.

Thereafter, an upper case 1 and a lower cover 22 are assembled to the liquid crystal panel 5 and the main frame 21 in which the backlight assembly 10 is accommodated.

The upper case 1 and the lower cover 22 serve to ground the PCB connected to the liquid crystal display panel while protecting the liquid crystal display panel and the backlight assembly.

2 is a cross-sectional view showing a lamp area of the liquid crystal display according to the prior art.

As shown in FIG. 2, the cross section of the lamp area is a backlight assembly 10 composed of optical sheets 11, a light guide plate 15, a reflector plate 17, and a lamp 13 inside the main frame 21. ) Is stored, and the lamp 13 is fixed by the lamp housing 30.

When the backlight assembly 10 is accommodated inside the main frame 21, the lower cover 22 is coupled to prevent separation and separation of the backlight assembly 10.

A plurality of coupling holes are formed in the lower cover 22 to be coupled to the main frame 21, and fastening protrusions are formed in the corresponding main frame 21.

When the main frame 21 is coupled to the lower cover 21, the upper case 1 is coupled to the upper portion of the main frame 21, and the liquid crystal panel and backlight assembly 10 coupled to the main frame 21. Protect them.

In the liquid crystal display having the structure as described above, when power is applied to the illustrated lamp area, the light generated from the lamp 13 travels along the light guide plate 15 of the backlight assembly 10.

The inner surface of the lamp housing 30 that fixes the lamp 13 is coated with silver to improve reflectivity, thereby reflecting light traveling in a direction opposite to the direction in which the light guide plate 15 is disposed. The light is transmitted to the light guide plate 15.

When the light generated by the lamp 13 is incident into the light guide plate 15, the light passes through the total reflection process on the upper and lower surfaces of the light guide plate 15 and is applied to the entire area of the light guide plate 15 and applied to the liquid crystal panel. To generate plane light.

However, as described above, the lamp housing of the liquid crystal display according to the related art is made of a sus material, which is usually a metal, and is arranged to fix the light guide plate and the reflecting plate while fixing the lamp to one side edge length of the light guide plate.

Therefore, the lamp housing is one of the parts having the highest weight in the assembly structure of the liquid crystal display device, and thus, there is a problem that the lamp housing has recently been reduced in weight.

Further, when manufacturing the liquid crystal display, the assembly process is complicated because the light guide plate and the reflecting plate must be fixed by the lamp housing and then inserted into the main frame.

As described above, when the assembling process of the liquid crystal display device becomes complicated, a production yield decreases.

According to the present invention, the lamp housing fixing the lamp in the liquid crystal display device can be removed, and the fastening structure of the lower cover and the main frame or the reflecting plate can be bent to fix the lamp, thereby simplifying light and small size and simplifying the assembly process. It is an object of the present invention to provide a liquid crystal display device.

In order to achieve the above object, the liquid crystal display device according to the present invention,

A liquid crystal display device comprising a backlight assembly, a main frame, a lower cover, and an upper case composed of optical sheets, a light guide plate, a lamp, and a reflection plate of a liquid crystal display device,

The lower cover coupled to the main frame and the reflector inserted between the lower cover and the light guide plate are coupled to the main frame in a structure in which both edges are vertically bent.

Here, the reflecting plate has a structure extending to the bent lower cover edge region, the light guide plate is fixed by the lower cover and the reflecting plate is bent with the main frame, the lamp is bent with the main frame It is characterized by being fixed by a cover and a reflecting plate.

In addition, the liquid crystal display according to another embodiment of the present invention,

A liquid crystal display device comprising a backlight assembly, a main frame, a lower cover, and an upper case composed of optical sheets, a light guide plate, a lamp, and a reflection plate of a liquid crystal display device,

The lower cover coupled to the main frame is vertically bent and coupled to the main frame, and a reflector inserted between the light guide plate and the lower cover extends to the lamp area.

Here, the main frame and the lower cover is fastened to the main frame by a coupling protrusion formed in the bent corner region of the lower cover, the main frame is fastened to the lower cover, the lamp is The main frame is fixed by fastening the lower cover, and the light guide plate is fixed by the lower cover and the reflecting plate which are bent with the main frame.

According to the present invention, by removing the lamp housing for fixing the lamp in the liquid crystal display device and fixing the lamp by the fastening structure of the lower cover and the main frame or the bent structure of the reflector, the number of parts can be reduced and the assembly process There is an effect that can be simplified.

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

3 is a view showing a lamp area of the liquid crystal display according to the present invention.

As shown in FIG. 3, the assembly structure of the liquid crystal display device includes a backlight assembly including optical sheets 111, a light guide plate 115, a reflector plate 117, and a lamp 113 inside the main frame 121. 110 is sequentially stored, and a liquid crystal panel 105 is attached to the upper portion of the main frame 121 by a panel guide.

Here, the lower cover 122 is coupled to the lower portion of the main frame 121 in which the backlight assembly 110 is accommodated.

The lower cover 122 has a structure bent to the corner region of the main frame 121, the bent lower cover 122 is fastened to the main frame 121.

The reflective plate 117 inserted between the lower cover 122 and the light guide plate 115 has a structure extended by both edges of the bent lower cover 122, and is vertically bent like the lower cover 122. The lamp 113 is wrapped around the main frame 121 and the bent reflector 117.

That is, the light guide plate 115 is fixed by the lower cover 122 and the reflecting plate 117 which are bent with the main frame 121, and the lower cover 122 and the reflecting plate which are bent with the main frame 121. 117 serves as a lamp housing for fixing the lamp 113 at the same time.

Therefore, in the related art, since the lamp housing for fixing the lamp is made of a metal sus material, the Ag metal coating is applied to the inside of the sus to have a high reflectivity so that light can be advanced to the inside of the light guide plate.

However, in the present invention, the reflector and the main frame reflect the light generated by the lamp to allow the light to travel inside the light guide plate.

In the present invention, the reflectance of the main frame and the reflector does not fall as compared with the Ag metal coated on the inner surface of the lamp housing, thereby removing the lamp housing and fixing the lamp using the main frame and the reflector.

Therefore, compared to the prior art, not only the lamp housing component is required but also the assembly process of the lamp housing can be omitted in the assembling process of the liquid crystal display device, thereby reducing material costs and simplifying the manufacturing process.

In addition, by removing the lamp housing from the assembly structure of the liquid crystal display device, there is an advantage that the liquid crystal display device can be made light and small.

4 is a view according to another exemplary embodiment of the present invention. As shown in FIG. 4, the assembly structure of the liquid crystal display device may include optical sheets 211, a light guide plate 215, a reflective plate 217, and an inner side of the main frame 221. The backlight assembly 210 formed of a lamp 213 is sequentially received, and a liquid crystal panel 205 is attached to the upper portion of the main frame 221 by a panel guide.

Here, a lower cover 222 is coupled to a lower portion of the main frame 221 in which the backlight assembly 210 is accommodated, and a plurality of holes and the main frame 221 formed on the lower cover 222. The fastening protrusions formed in) are combined.

In addition, the lower cover 222 coupled to the main frame 221 has a plurality of engaging projections formed on both sides of the edge edge of the lower cover 222 in a state where both sides are bent vertically, and the main A plurality of fastening grooves formed at the edges of the frame 221 are integrally coupled.

In this case, the reflector 217 extends to the area of the lamp 213 so that the light generated by the lamp 213 is reflected by the reflector 217 and then propagates to the light guide plate 215. It is supposed to be.

The lamp 213 is fixed by the fastening of the main frame 221 and the lower cover 222, and the light guide plate 215 is the lower cover 222 and the reflector plate that are bent with the main frame 221. 217).

Therefore, a role of a lamp housing for fixing the lamp 213 is provided in the main frame 221 and the lower cover 222.

And the role of reflecting the light generated from the lamp 213 is made by the reflecting plate 217 and the main frame 221, so that the light generated from the lamp 213 is advanced to the light guide plate 215. .

Therefore, since the lamp housing for fixing the lamp 213 is conventionally made of a metal sus material, the light generated from the lamp 213 is reflected to the light guide plate 215 by the Ag metal coating on the inside of the sus. To make it possible.

Thus, since the Ag metal coating has a high reflectance, the light guide plate 215 may proceed without loss of light to the inside of the light guide plate 215. However, in the present invention, the lamp may be formed by the reflector plate 217 and the main frame 221 extending to the lamp area. The light generated at 213 is reflected to propagate light into the light guide plate 215.

In the present invention, there is no assembly process of the lamp housing as compared to the prior art, the manufacturing process is simplified, and the liquid crystal display device can be made light and short by removing the metal lamp housing from the assembly structure of the liquid crystal display device.

As described in detail above, the present invention removes the lamp housing for fixing the lamp in the liquid crystal display, and fixed to the lamp by the structure of the fastening structure of the lower cover and the main frame or the reflecting plate, thereby reducing the light and thin There is an effect that can simplify the assembly process.

The present invention is not limited to the above-described embodiments, and various changes can be made by those skilled in the art without departing from the gist of the present invention as claimed in the following claims.

Claims (9)

A liquid crystal display device comprising a backlight assembly, a main frame, a lower cover, and an upper case composed of optical sheets, a light guide plate, a lamp, and a reflection plate of a liquid crystal display device, The lower cover coupled to the outside of the main frame, and the reflecting plate inserted between the lower cover and the light guide plate are coupled to the main frame in a structure in which both corners are vertically bent. And the lamp is wrapped by the bent structure of the lower part of the main frame and the reflector. The method of claim 1, And the reflective plate extends to the bent lower cover edge region. The method of claim 1, And the light guide plate is fixed by a lower cover and a reflecting plate which are bent with the main frame. The method of claim 1, And the lamp is fixed by a lower cover and a reflecting plate which are bent with the main frame. A liquid crystal display device comprising a backlight assembly, a main frame, a lower cover, and an upper case composed of optical sheets, a light guide plate, a lamp, and a reflection plate of a liquid crystal display device, The main frame has a structure in which the lower surface is bent, The lower cover coupled to the main frame is bent vertically so that the bent inner surface of the lower cover is coupled to the outside of the main frame, and the reflecting plate inserted between the light guide plate and the lower cover extends to the lamp area. , And the lamp is surrounded by the bent bottom surface of the main frame and the top surface of the reflective plate. The method of claim 5, And the main frame and the lower cover are fastened to the main frame by coupling protrusions formed at bent corners of the lower cover. delete The method of claim 5, And the lamp is fixed by fastening the main frame and the lower cover. The method of claim 5, And the light guide plate is fixed by a lower cover and a reflecting plate which are bent with the main frame.

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