KR20060121372A - Liquid crystal display device - Google Patents

Abstract

An LCD is provided to eliminate the need of attaching a non-conductive cover on an upper chassis through an additive process, by forming an upper chassis to include a non-conductive layer. An LCD comprises an LCD panel(20), a backlight unit, and an upper cover(10) for wrapping the circumference of the LCD panel. The backlight unit is located at the rear of the LCD panel. The upper cover has a conductive layer(14) contacted with the LCD panel, and a non-conductive layer(15) deposited on the conductive layer. A lower cover(60) is located at the rear of the backlight unit. The lower cover has a conductive layer contacted with the backlight unit and a non-conductive layer deposited on the conductive layer.

Description

Liquid crystal display {LIQUID CRYSTAL DISPLAY DEVICE}

1 is an exploded perspective view of a liquid crystal display according to a first embodiment of the present invention;

2 is a perspective view illustrating main parts of a liquid crystal display according to a second exemplary embodiment of the present invention;

3 is a perspective view of principal parts of a liquid crystal display according to a third embodiment of the present invention; and

4 is a perspective view illustrating a coupling state of a liquid crystal display according to a fourth exemplary embodiment of the present invention.

* Explanation of symbols on the main parts of the drawing * ㅎㅎ

10, 11, 12: top cover 14: electrical conductive layer

15: electrical non-conductive layer 16: bonding portion

17: bite groove 20: liquid crystal display panel

25 drive unit 30 light control member

   34: reflector 40: light source

   51: side mold 53: middle mold

   60, 61, 62, 63: lower cover 64: electrically conductive layer

   65: electrical non-conductive layer 66: bonding portion

   67: bite groove 70: coupling member

   72: coupling jaw 74: connection

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device including an upper cover.

The liquid crystal display includes a thin film transistor substrate, a color filter, and a liquid crystal display panel in which liquid crystal is injected between both substrates. Since the liquid crystal display is a non-light emitting device, a backlight unit for supplying light is disposed on the rear surface of the thin film transistor substrate. Light transmitted from the backlight unit is adjusted according to the arrangement of liquid crystals. The liquid crystal display panel and the backlight unit are accommodated in the upper chassis and the lower chassis.

Typically the upper and lower chassis are made of a conductive metal material. Therefore, in the process of manufacturing the product using the liquid crystal display, in order to protect the user from the overcurrent and the convenience of design or color implementation, when only the front of the liquid crystal display is exposed to the outside, the front and rear of the affection display are If both are exposed to the outside, a cover made of a non-conductive material is separately put on both the upper chassis and the lower chassis.

Therefore, the shape of the cover used by the company that manufactures the product using the liquid crystal display device is different. Therefore, the molds of the upper chassis or the upper chassis and the lower chassis must be manufactured separately so as to fit the module of the company. In addition, there is a problem in that a company receiving a liquid crystal display device also needs to manufacture a finished product by covering a cover made of a separate non-conductive material.

Accordingly, an object of the present invention is to provide a liquid crystal display device which does not need to reattach the electrically nonconductive cover to the upper chassis through a separate process.

The above object is, according to the present invention, a liquid crystal display panel; A backlight unit positioned behind the liquid crystal display panel; And a top cover surrounding the periphery of the liquid crystal display panel and having an electrically conductive layer in contact with the liquid crystal display panel and an electrically nonconductive layer stacked on the electrically conductive layer.

And a lower cover having a rear surface of the backlight unit and having an electrically conductive layer in contact with the backlight unit and an electrically nonconductive layer stacked on the electrically conductive layer, when the rear surface of the liquid crystal display is exposed to the outside. desirable.

Each of the upper cover and the lower cover has a coupling portion engaged with each other, or each of the upper cover and the lower cover is provided with a bite groove, and connects the engaging jaw and the engaging jaw accommodated in the respective bite grooves. It is preferable to further include a coupling member having a connecting portion so that the upper cover and the lower cover do not easily open to each other.

The electrically conductive layer is stainless steel (SUS) and the non-conductive layer may be made of an insulating resin.

The electrically nonconductive layer may be coated or adhered to the electrically conductive layer.

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

In various embodiments, like reference numerals refer to like elements, and like reference numerals refer to like elements in the first embodiment and may be omitted in other embodiments.

A liquid crystal display according to a first embodiment of the present invention will be described with reference to FIG. 1 is an exploded perspective view of a liquid crystal display according to a first embodiment of the present invention, respectively. The light source part 40 shown in the figure is a case where a cold cathode fluorescent lamp (CCFL) is used, and is provided in the direct type | mold type.

The liquid crystal display device includes a liquid crystal display panel 20, a plurality of light adjusting members 30 disposed on the rear surface of the liquid crystal display panel 20, a light source unit 40, and a light source unit 40 covering the entire rear surface of the liquid crystal display panel 20. The reflection plate 34, the side mold 51, and the middle mold 53 are positioned below the bottom surface.

 The liquid crystal display panel 20 bonds the thin film transistor substrate 21 on which the thin film transistor is formed, the color filter substrate 22 facing the thin film transistor substrate 21, and the two substrates 21 and 22 to each other, thereby bonding a cell gap. a sealant 23 forming a gap), and a liquid crystal layer 24 positioned between both substrates 21 and 22 and the sealant 23. The liquid crystal display panel 20 adjusts the arrangement of the liquid crystal layer 24 to form a screen, but because it is a non-light emitting device, light must be supplied from the light source unit 40 located on the rear surface. One side of the thin film transistor substrate 21 is provided with a driver 25 for applying a driving signal to the liquid crystal display panel 20. The driver 25 includes a flexible printed circuit board (FPC. 26), a driving chip (27) mounted on the flexible printed circuit board (26), and a circuit board (PCB) connected to the other side of the flexible printed circuit board (26). 28). The driver 25 illustrated represents a chip on film (COF) method, and other known methods such as a tape carrier package (TCP) and a chip on glass (COG) may be used. In addition, the driver 25 may be mounted on the thin film transistor substrate 21.

The light adjusting member 30 disposed on the rear surface of the liquid crystal display panel 20 includes a diffusion plate 31, a prism film 32, and a protective film 33.

The diffusion plate 31 serves to diffuse the light from the light source unit 40 and supply the light to the liquid crystal display panel 20, and may be formed of any one of polymethyl methacrylate (PMMA) and methyl styrene (MS) resin. . Since the diffusion plate 31 is not supported by the light guide plate, unlike the edge type, the diffusion plate 31 may be somewhat thicker for strength, but is not limited thereto, but is provided with a thickness of about 1 mm to 2 mm.

The prism film 32 is formed with a triangular prism-shaped prism on the upper surface. The prism film 32 collects the light diffused from the diffusion plate 31 in a direction perpendicular to the plane of the upper liquid crystal display panel 20. Two prism films 32 are usually used, and the micro prisms formed on each prism film 32 have a predetermined angle. The light passing through the prism film 32 is almost vertically progressed to provide a uniform luminance distribution.

The protection film 33 positioned at the top protects the prism film 32 that is weak to scratches.

The light source unit 40 includes a plurality of lamps 41 arranged in parallel with each other. The lamp 41 covers the entire rear surface of the liquid crystal display panel 20. Both ends of the lamp 41 are electrode portions (not shown) and are accommodated in the lamp holder 42.

The lamp holder 42 is located in the side mold 51 through the receiving groove 52 formed in the side mold 51 and is not exposed. The side molds 51 are provided in pairs on opposite sides of the liquid crystal display panel 20. The side molds 51 surround the lamp holder 42 and support the light control members 31, 32, and 33 as described above. Also The middle mold 53 supports the liquid crystal display panel 20.

The reflector 34 is positioned under the light source 40 and reflects the light of the light source 40 to supply toward the diffuser 31. The reflective plate 39 may be made of polyethylene terephthalate (PET) or polycarbonate (PC).

The liquid crystal display panel 20, the light adjusting member 30, the light source 40, and the reflecting plate 39 described above are accommodated between the upper cover 10 and the lower cover 60.

Top cover 10 includes a bilayer of an electrically conductive layer 14 and an electrically nonconductive layer 15.

The electrically conductive layer 14 wraps around the liquid crystal display panel 20 and is in contact with the liquid crystal display panel 20. The electrically conductive layer 14 has strength to protect the liquid crystal display panel 20 and serves to interconnect the circuit board 28 and the ground of the driver 25. The electrically conductive layer 14 is made of stainless steel (SUS, STEEL USE STAINLESS) material, but is not limited thereto. Other electrically conductive metals having strength may be used.

The electrically nonconductive layer 15 is laminated on the electrically conductive layer 14. The electrically nonconductive layer 15 may be laminated on the electrically conductive layer 14 by coating, or may be laminated by adhering the electrically conductive layer 14 with an adhesive. The non-conductive layer 15 is not limited thereto, but is made of an insulating resin that is a non-conductive material to prevent an electric shock of the user of the liquid crystal display due to an overcurrent that may flow in the electrically conductive layer 14. For convenience of understanding in FIG. 1 (the same as in FIGS. 2 to 4), the electrically conductive layer 14 surrounding the periphery of the liquid crystal display panel 20 is exposed to the outside along the periphery of the front portion of the liquid crystal display panel. In reality, it is covered by the non-conductive layer 15 so as not to be exposed to the outside. In addition, the non-conductive layer 15 is made of an insulating resin, and is easier to process than metal materials such as stainless steel, thereby implementing various shapes and colors.

According to the upper cover 10 of the liquid crystal display device according to the first embodiment of the present invention, the company providing the liquid crystal display device is different from the shape of the cover used by the recipient is different from the upper chassis or upper Since the mold of the chassis and the lower chassis need not be manufactured separately, the module can be standardized and the manufacturing time and cost of the liquid crystal display can be reduced. In addition, in terms of the user who receives the liquid crystal display and manufactures the finished product using the same, there is no need to combine a separate non-conductive top cover to the existing upper chassis of the metallic material through a separate process. The cost can be reduced.

Hereinafter, a liquid crystal display according to a second exemplary embodiment of the present invention will be described with reference to FIG. 2. 2 is an enlarged perspective view illustrating main parts of a liquid crystal display according to a second exemplary embodiment of the present invention, and shows an upper cover and a lower cover.

In the liquid crystal display according to the second embodiment of the present invention, unlike the first embodiment, the lower cover 61 of the liquid crystal display device also has the electrically conductive layer 64 and the electrically nonconductive layer 65 similarly to the upper cover 10. It includes.

Among products in which a liquid crystal display device is used, a rear surface of the liquid crystal display device may be exposed to the outside, such as a notebook computer. In this case, a metal material such as SUS, which is an electrically conductive material exposed to the outside, may threaten the safety of the user due to an electric shock accident when an overcurrent flows. Therefore, the electrically conductive layer 65 is formed of an electrically nonconductive material 65, which may serve as a conventional external cover, on the lower cover 61, so that the electrically conductive layer is not exposed to the outside. .

In addition, according to the lower cover 61 of the liquid crystal display according to the second embodiment of the present invention, there is no need to couple the non-conductive top cover to the existing lower chassis of the metallic material through a separate process. Therefore, the manufacturing time and cost of the liquid crystal display and the finished product using the same can be reduced. On the other hand, since the electrical non-conductive layer 65 made of an insulating resin is easier to process than a metal, which is an electrically conductive material, it is possible to implement various shapes or colors, thereby facilitating the design or color desired by the consumer.

Hereinafter, a liquid crystal display according to a third embodiment of the present invention will be described with reference to FIG. 3. 3 is an enlarged perspective view illustrating main parts of the liquid crystal display according to the third exemplary embodiment of the present invention, and shows the upper cover 11 and the lower cover 62.

In the liquid crystal display according to the third embodiment of the present invention, unlike the liquid crystal display device according to the second embodiment, the upper cover 11 and the lower cover 62 correspond to and engage with the engaging portions 16 and 66. It is prepared to have each.

Coupling portions 16 and 66 are engaging jaws 16 provided in the corner portion facing the lower cover 62 of the opposite side of the upper cover 11, and the engaging jaw in the corresponding corner portion of the lower cover 62 It includes a receiving groove (66) formed to accommodate the (16). Accordingly, when the liquid crystal display panel 20, the driving unit 25, the light adjusting member 30, and the light source unit 40 are accommodated as the upper cover 11 and the lower cover 62, the locking jaw 16 is coupled. The force to be accommodated in the receiving groove 66 can be simply pushed in. This prevents the upper cover 11 and the lower cover 62 from opening to each other, and does not need to go through the process of fastening the screws by making a separate screw fastener, thereby reducing the work time and cost.

Hereinafter, a liquid crystal display according to a fourth exemplary embodiment of the present invention will be described with reference to FIG. 4. 4 is a perspective view of a liquid crystal display according to an exemplary embodiment of the present invention, and shows a coupling structure of the upper cover 12 and the lower cover 63 different from the third embodiment.

Engaging grooves 17 and 67 are provided on side surfaces of short sides of the upper cover 12 and the lower cover 63 of the liquid crystal display according to the fourth embodiment of the present invention, respectively. The upper cover 12 and the lower cover 63 are fixed to each other by receiving and coupling the coupling member 70 to the biting grooves 17 and 67. Therefore, the liquid crystal display according to the fourth embodiment of the present invention also prevents the upper cover 12 and the lower cover 63 from opening like the liquid crystal display of the third embodiment, and makes a separate screw fastener so that the screw There is no need to go through the fastening process, which saves time and money.

The above embodiments can be variously modified. Each embodiment of the present invention has been described using the cold cathode fluorescent lamp 41, but is not limited thereto. The present invention is also applicable to an external electrode fluorescent lamp (EEFL) or an LED (LED). In addition, although each embodiment of the present invention has been described using a direct type backlight unit, the present invention is not limited thereto and may be applicable to an edge type backlight unit.

Thus, although some embodiments of the invention have been shown and described, it will be apparent to those skilled in the art that the embodiments may be modified without departing from the spirit or spirit of the invention. will be. It is intended that the scope of the invention be defined by the claims appended hereto and their equivalents.

As described above, according to the present invention, there is provided a liquid crystal display device which does not need to reattach the electrically nonconductive cover to the upper chassis through a separate process.

Claims (8)

A liquid crystal display panel; A backlight unit positioned behind the liquid crystal display panel; And an upper cover surrounding a circumference of the liquid crystal display panel and having an electrically conductive layer in contact with the liquid crystal display panel and an electrically nonconductive layer stacked on the electrically conductive layer. The method of claim 1, And a lower cover positioned behind the backlight unit and having an electrically conductive layer in contact with the backlight unit and an electrically nonconductive layer stacked on the electrically conductive layer. The method of claim 2, And the upper cover and the lower cover each have a coupling part to be engaged with each other. The method of claim 2, Each of the upper cover and the lower cover is provided with a gutter groove, the liquid crystal display device further comprising a coupling member having a coupling jaw and a connection portion connecting the coupling jaw accommodated in each of the gripping grooves; The method according to claim 1 or 2, And the electrically conductive layer is made of stainless steel (SUS). The method according to claim 1 or 2, And said electrically nonconductive layer is an insulating resin. The method according to claim 1 or 2, And the electrically nonconductive layer is coated on the electrically conductive layer. The method according to claim 1 or 2, And the electrically nonconductive layer is adhered to the electrically conductive layer.

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