KR100891074B1 - Structure for lamp housing of lcd - Google Patents

Abstract

The present invention discloses a liquid crystal display lamp housing structure that facilitates the electrical coupling of the lamp housing, the lower cover and the top case of the liquid crystal display device to simplify the operation and reduce the manufacturing cost. Disclosed is a liquid crystal comprising a main frame to which a display panel of a liquid crystal display device is coupled, a backlight unit and a reflecting plate coupled to a lower side of the main frame, and an upper case and a lower cover coupled to upper and lower portions of the main frame. In the display device, the bent portion of the lamp housing which integrally fixes the backlight unit and the reflector plate is coupled to the lower cover, and the bent portion of the housing coupled to the lower cover is fixed by an upper case. It is done.

LCD, panel, bottom cover, backlight, housing, screw

Description

Liquid crystal display lamp housing structure {STRUCTURE FOR LAMP HOUSING OF LCD}

1 is a view showing components generally assembled to the main frame of a liquid crystal display.

2 is a plan view illustrating a rear surface of a main frame of a liquid crystal display according to the related art.

3A and 3B are enlarged views of region A in FIG. 2.

4 is a perspective view illustrating a structure of a liquid crystal display lamp housing according to the present invention;

Figures 5a and 5b is a view showing a combination of the lamp housing and the lower cover in accordance with the present invention.

FIG. 6 is a view of vertically cutting a backlight unit region to which a lamp housing is coupled according to the present invention; FIG.

7 is a view showing a state in which the lamp housing, the top case, the lower cover is connected in accordance with the present invention.

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

41: main frame 43: backlight unit

49: backlight cable 55: lamp housing

57: lower cover fixing portion 61: housing bent portion                 

62: case fixing portion 52: lower cover

The present invention relates to a liquid crystal display lamp housing structure, and more particularly to a liquid crystal display lamp housing structure that can simplify the ground coupling process of the lamp housing and the lower cover, thereby lowering the manufacturing cost.

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 units, 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.

FIG. 1 is a view illustrating components assembled to a main frame of a liquid crystal display generally.

As illustrated in FIG. 1, a backlight unit is attached to a liquid crystal display panel 5 in which an array substrate in which a plurality of pixels are formed 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 to each other. They are stacked together and stored in the main frame.

At one edge of the LCD panel 5, a gate printed circuit board (PCB) 7 for applying a driving signal may connect a gate pad and a gated taper package (TCP) of the LCD panel 5. It is connected by a flexible cable between them.

Similarly, at the other edge of the liquid crystal display panel 5, a data printed circuit board 9 for applying a graphic signal is connected to the data pad of the liquid crystal display panel 5 by a flexible cable. The data TCP is attached to the liquid crystal display panel 5 to apply a signal in accordance with a certain scanning method.

Under the liquid crystal display panel 5, a plurality of optical sheets 11 and a backlight 13 for generating a light source for representing an image, and light generated from the backlight is a plane of the area of the liquid crystal display panel 5. The backlight unit 10 including the light guide plate 15 for converting the light and the reflector plate 17 for reflecting the light leaked from the light guide plate 15 to increase the light efficiency is attached.

The backlight unit 10 and the liquid crystal display panel 5 are inserted in a stacked form on the main frame 21 for optical alignment while protecting from external impact. In order to prevent the liquid crystal display panel 5 from moving, a guide panel 3 may be attached to fix the liquid crystal display panel.

The main frame 21 is divided into a metal material or a plastic material. The liquid crystal display panel 5 and the backlight unit 10 are inserted into the main frame 21 in a stacked form. The panel 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 display panel 5 and the main frame 21 in which the backlight unit 10 is housed.                         

The top case 1 and the lower cover 22 serve to ground the PCB connected to the LCD panel while protecting the LCD panel and the backlight unit.

2 is a plan view illustrating a rear surface of a liquid crystal display main frame according to the prior art.

As shown in FIG. 2, the liquid crystal display panel and the backlight unit are coupled to the main frame 21, and the main frame 21 is fastened from the rear side by the lower cover 22.

Both sides of the main frame 21 are exposed with a backlight connector 20 drawn out from the backlight of the backlight unit. The lower cover 22 is usually formed of a metal plate, and serves to store the backlight units coupled to the lower portion of the main frame 21 so as not to be exposed to the outside, and the PCBs coupled to the liquid crystal display panel are When folded back to the main frame 21, it is used for its grounding.

Although not clearly shown in the drawings, the lower cover 22 is fastened to the main frame 21, and then the top case is fastened to be coupled to the lower cover 22.

When the top case is fastened to the outside, only the active area of the liquid crystal display panel is exposed to the outside, and other components used in the liquid crystal display are sealed inside the top case and the lower cover.

3A and 3B are enlarged views of region A in FIG. 2.                         

As shown in FIGS. 3A and 3B, a liquid crystal display panel 5 is mounted on the main frame 21, and a backlight unit 13 is disposed inside the main frame 21. The rear surface of the main frame 21 on which the backlight unit 13 is placed is fastened by a lower cover 22.

When the backlight unit 13 is inserted into the main frame 21, the backlight is exposed on both edges of the main frame 21. The backlight unit 13 is fixed by the lamp housing 25. have.

Then, the structure is fixed by the housing fixing portion 31 formed in the lamp housing 25, the lower cover fixing portion 27 formed in the lower cover 22 and the screw 26. .

The lower cover fixing part 27 and the housing fixing part 31 may be fastened from the outside in a form in which a part of the lower cover fixing part 27 and the housing fixing part 31 are exposed.

Although not clearly shown in the drawing, the lamp housing 25 covers the backlight unit 13 of the backlight unit 13 while fixing a part of the light guide plate coupled to the backlight unit 13.

As shown in FIG. 3B, the lower cover 22 is fastened to cover the front surface of the rear surface of the main frame 21, and has a housing fixing part 26 that is partially exposed from the lamp housing 25. It is fastened and coupled by the screw 26 to expose a thread 20 of a part of the screw 26 to the rear surface of the main frame 21.

That is, the lower cover 22 is coupled to the rear surface of the main frame 21, and has a structure in which the lamp housing 25 and the screw 26 are fastened.

However, in the prior art as described above, when the backlight unit is fixed by the lamp housing and then inserted into the main frame and coupled by the lower cover, the backlight unit is fastened by a screw for coupling the lamp housing and the lower cover. The process had a complicated problem.

 In addition, in order to fasten the lower cover and the lamp housing by a screw, a fastening part protruding out of the edge of the main frame forms a fixing part, which makes it difficult to simplify the work efficiency and structure of the LCD.

It is an object of the present invention to provide a liquid crystal display lamp housing structure which simplifies the process so that the lamp housing fixing the backlight unit of the liquid crystal display device and the lower cover can be easily coupled.

In order to achieve the above object, the liquid crystal display lamp housing structure according to the present invention,

In the liquid crystal display device comprising a main frame to which the display panel of the liquid crystal display device is coupled, a backlight unit and a reflecting plate coupled to the lower side of the main frame, and an upper case and a lower cover coupled to upper and lower portions of the main frame. book,

The bent part of the lamp housing which integrally fixes the backlight unit and the reflector is coupled to the lower cover, and is further configured to fix the bent part of the housing coupled to the lower cover by an upper case.

The lower cover, the lamp housing, and the upper case are electrically integrally contacted, and a fixing part is integrally formed on the upper case corresponding to the bent region of the lamp housing to which the lamp housing and the lower cover are coupled. The bent portion of the lamp housing may be bent at least 90 ° along a plane in which the upper case and the lower case are coupled to each other to be electrically coupled to the lower cover.

According to the present invention, the grounding of the lamp housing and the lower cover by means of a screw may be simplified to reduce the manufacturing cost by simplifying the process by bending the metal located in the coupling area to ground the lower cover.

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

4 is a perspective view illustrating a structure of a liquid crystal display lamp housing according to the present invention.

As shown in FIG. 4, the lamp housing 55 fixing the backlight units has a '??' shape and has a '??' cross section to protect the backlight having a long bar shape. It is supposed to have a backlight length.                     

The lamp housing 55 is formed of a metal plate, and fixes the backlight units (light guide plate and reflector plate) up and down by an inherent elastic force of the metal.

The plurality of holes are formed on the surface of the lamp housing 55 to reduce the weight.

In addition, the housing bent portion 61 is formed to engage the lower cover in an area where the lamp housing 55 fixes the backlight units and is exposed to the edge of the main frame.

The housing bent portion 61 is also bent over 90 ° so that the housing bent portion 61 can be combined with the lower cover by the elastic force of the metal.

The housing bent portion 61 has a structure in which the lower cover is fastened, and after the fastening, the housing bent portion 61 fixes the lower cover with a constant force by the metal elastic force of the housing bent portion 61.

Although the housing bent portion 61 is formed at the edge of the lamp housing 55 in the drawing, in some cases, a plurality of housing bent portions 61 may be formed along the lamp housing 55.

Likewise, the lower cover is fastened to the plurality of housing bent portions by a combination without a separate fastening tool.

5A and 5B are views illustrating a state in which the lamp housing and the lower cover are coupled according to the present invention.

As shown in FIGS. 5A and 5B, a display panel 35 of a liquid crystal display device is coupled to an upper portion of the main frame 41, and optical sheets, a backlight, a light guide plate, and a reflecting plate are disposed inside the main frame 41. Are combined in a stacked form.

In this case, the backlight, the light guide plate, and the reflective plate have a structure fixed by the lamp housing 55, and the lower cover is fastened to the lower side of the main frame 41.

At this time, one side edge of the lower cover is inserted into the housing bent portion 61 formed in the lamp housing 55 to be fastened.

That is, in order to fasten the lower cover and the lamp housing as in the prior art, the lower cover and the lamp housing are fastened by a combination without a screw fastening process.

Subsequently, as shown in FIGS. 6 and 7, when the lower cover 52 is coupled to the main frame 41, the upper case 40 is then fastened to the upper case 40. The case fixing part 62 is formed in a region where the housing bend 61 and the lower cover 52 of the lamp housing 55 are coupled to each other so that the housing bend 61 is coupled by a constant elastic force. .

As described above, in the present invention, the upper case 40, the lower cover 52, and the lamp housing 55 are not only in electrical contact with each other, but also the housing bent portion 61 and the upper part of the lamp housing 55. It is fixed by a constant force by the elastic force of the case fixing part 62 of the case 40. As shown in FIG.

FIG. 6 is a view of vertically cutting a backlight unit region to which a lamp housing is coupled according to the present invention.                     

As shown in FIG. 6, a liquid crystal display panel 25 is coupled to an upper portion of the main frame 41, and optical sheets 51, a backlight 43, and a rear surface of the main frame 41 are coupled to each other. The backlight unit 30 which consists of the light guide plate 75 and the reflecting plate 77 is mounted.

The reflective plate 77 is attached on the lower surface of the light guide plate 75 to reflect light emitted from the backlight 43 or to reflect the light flowing out when the plane light is generated in the light guide plate 75.

The backlight unit 30 is fixed by the “c” shaped lamp housing 55, and the reflector plate 77, the backlight 43, and the light guide plate 75 are optically missed due to vibration during external shock or movement. To prevent miss align.

When the optical sheets 51, the backlight 43, the light guide plate 75, and the reflector plate 77 are mounted to the rear side of the main frame 41, the lower cover 52 is first coupled to the rear side of the main frame 41. And the housing bent portion 61 of the lamp housing 55.

When the lower cover 52 is coupled, the upper case 40 is then coupled to the upper case 40. The case fixing part 62 is integrally formed on the upper case 40 to be coupled with the lower cover 52. An area that is coupled to the housing fixing portion 61 of the lamp housing 55 is such that the case fixing portion 62 is coupled with a constant elastic force.

7 is a view showing a state in which the lamp housing, the top case, the lower cover is connected in accordance with the present invention.

As shown in FIG. 7, while the lower cover 55 is coupled to the main frame back, the corner portion is coupled to the housing bent portion 61 of the lamp housing 55. Since the housing bent portion 61 is a metal plate bent at 90 ° or more, the lower cover 52 is coupled to be coupled by a predetermined elastic force.

When the upper case 40 is coupled to the outside of the lower cover 52 after the lower cover 52 is engaged, the case fixing part 62 formed on the upper case 40 is the housing bent portion. (61) to be able to apply a constant force.

Therefore, after the backlight unit and the liquid crystal display panel are coupled to the main frame, when the lower cover 52 and the upper case 40 are coupled, only a simple coupling process without a separate screw process is required. The process is simplified.

However, since the lamp housing, the lower cover, and the upper case can be electrically contacted using the elastic force of the metal plate, there is no need to attach another mechanism for grounding.

As described in detail above, the present invention has the effect of simplifying the process by bending the metal plate instead of screws to electrically ground the lamp housing and the lower cover of the liquid crystal display device.

In addition, the upper case, the lower cover, and the lamp housing can be integrally grounded, thereby increasing not only electrical grounding but also ground bonding force.

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 (4)

In the liquid crystal display device comprising a main frame to which the display panel of the liquid crystal display device is coupled, a backlight unit and a reflecting plate coupled to the lower side of the main frame, and an upper case and a lower cover coupled to upper and lower portions of the main frame. , And a bent portion of the lamp housing which integrally fixes the backlight unit and the reflecting plate to be coupled to the lower cover, and to fix the bent portion of the housing coupled to the lower cover by an upper case. Lamp housing structure. The method of claim 1, And the lower cover, the lamp housing, and the upper case are electrically integrally contacted. The method of claim 1, And a fixing part integrally formed on the upper case corresponding to the bent portion of the lamp housing to which the lamp housing and the lower cover are coupled. The method of claim 1, And a bent portion of the lamp housing is bent 90 ° to 179 ° along a plane where the upper case and the lower cover are coupled to each other to be electrically coupled to the lower cover.

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