KR101296630B1 - Liquid Crystal Display Device and Method for fabricating of Liquid Crystal Display Device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device and a method for manufacturing the same, and more particularly, to a liquid crystal display device and a method for manufacturing the same, comprising a cover shield attached and assembled with an adhesive means.

In order to achieve the above object, a liquid crystal display according to the present invention includes a board assembly including a liquid crystal panel for realizing an image, and a backlight assembly including a lamp for irradiating light to the board assembly. assembly), a case top coupled to an upper portion of the board assembly to fix the board assembly to the backlight assembly, and a cover shield coupled to a rear surface of the backlight assembly.

The cover shield is provided with an adhesive means, characterized in that attached to one side of the backlight assembly is assembled.

In addition, the manufacturing method of the liquid crystal display according to the present invention is characterized in that it comprises the step of coupling the cover shield with the adhesive means to the backlight assembly without using a screw.

Cover shield, screw

Description

Liquid crystal display device and method for manufacturing the same {Liquid Crystal Display Device and Method for fabricating of Liquid Crystal Display Device}

1 is an exploded perspective view of a liquid crystal display device according to the prior art.

FIG. 2A is a rear view of a state in which a cover shield is coupled in a conventional LCD. FIG.

FIG. 2B is a sectional view taken along the line II 'of FIG. 2A; FIG.

3 is an exploded perspective view of the liquid crystal display device according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view of II-II 'portion of the cover shield in FIG.

Figure 5 is a cross-sectional view when a structure for guiding the double-sided tape is further formed on the cover bottom in a second embodiment of the present invention.

FIG. 6 is a cross-sectional view of a portion corresponding to part II-II 'of FIG. 3 in the liquid crystal display according to the third embodiment of the present invention; FIG.

7A is a perspective view of a liquid crystal display according to a third embodiment of the present invention.

FIG. 7B is a sectional view of a section III-III ′ in FIG. 7A;

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device and a manufacturing method, and in particular, the liquid crystal display device according to the present invention includes a cover shield provided with an adhesive means and attached to one surface of a backlight assembly.

In addition, the method of manufacturing a liquid crystal display according to the present invention includes attaching and assembling the cover shield to one surface of a backlight assembly using the cover shield provided with the adhesive means.

As a means to convey information in an information society, the importance of display is more important than ever. In particular, the recent development of technologies for various flat panel displays such as liquid crystal displays (LCDs), plasma display panels (PDPs), organic light emitting diodes (OLEDs), etc. Compensates for the weight, volume, and other disadvantages of the CRT (Catode Ray Tube), and creates new demands such as notebooks, mobile phones, portable multimedia players (PMPs), digital cameras, navigation, etc., as well as computer monitors and TVs. Doing.

However, the rapid development of such technology in the field of flat panel display has intensified competition among flat panel displays in the market, and the liquid crystal display device, which has been established as a representative flat panel display, has improved the process productivity in order to preoccupy the market advantage continuously. The need to reduce production costs is emphasized.

Next, a liquid crystal display according to the related art will be described with reference to the accompanying drawings.

1 is an exploded perspective view showing a liquid crystal display device according to the prior art.

A general liquid crystal display device includes a board assembly 10 having a liquid crystal panel that implements an image and a signal unit supplying a signal to the liquid crystal panel, a backlight assembly 20 disposed below the board assembly, and the board assembly. And a case shield 30 coupled to an upper part to protect and fix the board assembly, and a cover shield 40 positioned on one surface of the backlight assembly to protect a circuit part of the board assembly.

In this case, the cover shield is generally coupled to the backlight assembly by a screw 42 coupled through a hole 43 formed on the cover shield and a hole 44 formed in the backlight assembly.

In general, the liquid crystal panel includes a liquid crystal cell 11 including a first substrate and a liquid crystal layer formed between the second substrate and the first and second substrates which are spaced apart at predetermined intervals from each other to face one surface of the first substrate; A first polarizing film 11a attached to the other surface of the first substrate and a second polarizing film 11b attached to the other surface of the second substrate.

Although not shown, the first substrate generally includes a light blocking layer for blocking light transmitted to portions other than the pixel area, a color filter layer for expressing color, and a common electrode for implementing an image. The common electrode may be formed on the first substrate according to the liquid crystal mode.

Although not shown, the second substrate generally includes a plurality of gate lines arranged at regular intervals, a plurality of data lines intersecting the gate lines, and arranged at regular intervals, and the gate lines and the data lines. A pixel electrode formed in each pixel region defined to cross each other, and a plurality of thin film transistors that are switched by signals of the gate lines to transfer signals of the data lines to each pixel electrode are formed.

The liquid crystal panel generally receives a control signal and a graphic signal transmitted from a system board (not shown) to implement an image.

The circuit unit includes a printed circuit board (12) for processing a signal, and a tape carrier package (TCP) 13 having a drive IC (not shown) for connecting the printed circuit board and the liquid crystal panel and applying a signal. It is configured to include.

The backlight assembly 20 generally includes a lamp (not shown) for supplying light to the board assembly 10, and a reflector 21 for allowing light formed through the lamp to efficiently travel toward the board assembly 10. And a prism sheet for increasing the efficiency of light passing through diffuse diffuser 22a and diffused light 22a for diffusely diffusing light into an area where an image is realized. An optical sheet layer 22 composed of a protective film 22c for protecting the prism sheet 22b and the diffusion film 22a, and the optical sheet layer 22 and the board assembly 10. It includes a support main (not shown) for supporting and fixing, and a cover bottom 23 for receiving the components.

The optical sheet layer in the backlight assembly may be changed in configuration as necessary.

FIG. 2A is a rear view illustrating a rear surface of the liquid crystal display according to the related art, in which a cover shield is fixed with a screw. FIG.

As can be seen in Figure 2b, the screw 42 is coupled across the holes formed in each of the cover shield 40, the printed circuit board 12, the cover bottom 23, and the support main 41, the case top In contact with (30). By contacting the case top 30 with the screw 42 for fixing the cover shield 40 in this manner, the effect of grounding the cover shield 40 to the case top 30 can be obtained.

The conventional method of assembling a liquid crystal display device may include forming a board assembly including a liquid crystal panel, mounting the board assembly to a backlight assembly, coupling a case top to an upper portion of the liquid crystal panel of the board assembly, Positioning a cover shield on a rear surface of the backlight assembly, and fixing the cover shield with screws.

However, in the liquid crystal display and the manufacturing method according to the prior art, in order to couple the cover shield to the backlight assembly, by using a screw through the holes formed in the cover shield and the backlight assembly, the process time is long and the screw There has been a problem in that the production cost as much as the cost increases to lower the price competitiveness of the liquid crystal display.

The present invention to solve the above problems, by using a cover shield provided with an adhesive means, by fixing the cover shield on the back of the backlight assembly without the use of screws, to reduce the tack-time of the process and to reduce the production cost The purpose of the present invention is to increase the price competitiveness of liquid crystal displays.

According to an aspect of the present invention, there is provided a liquid crystal display device including a board assembly including a liquid crystal panel for implementing an image, a signal unit receiving a signal and transmitting the signal to the liquid crystal panel, and positioned at a lower portion of the board assembly. It comprises a backlight assembly to irradiate, a case top coupled to the top of the board assembly to secure the board assembly to the backlight assembly, and a cover shield coupled to the back of the backlight assembly,

The cover shield is provided with an adhesive means, and is attached to one surface of the backlight assembly without a screw and is coupled to the backlight assembly at the same time.

In addition, the manufacturing method of the liquid crystal display device of the present invention for achieving the above object comprises the steps of forming a board assembly including a liquid crystal panel, mounting the board assembly to the backlight assembly, coupling the case top to the backlight assembly And fixing the board assembly to the backlight assembly, and attaching and fixing a cover shield to the rear surface of the backlight assembly.

The cover shield used in the step of attaching and fixing the cover shield is characterized by having an adhesive means.

Hereinafter, an embodiment to which the idea of the present invention is applied will be described with reference to the accompanying drawings.

3 is an exploded perspective view of a liquid crystal display according to a first exemplary embodiment of the present invention.

The liquid crystal display according to the first exemplary embodiment of the present invention includes a board assembly (110) having a liquid crystal panel for realizing an image and a signal unit for supplying a signal to the liquid crystal panel, and is located below the board assembly (110). A backlight assembly 120 for irradiating light, a case top 130 coupled to the board assembly 110 and fixing the board assembly 110 to the backlight assembly 120, and the backlight assembly 120. It is configured to include a cover shield 140 is coupled to the back of,

The cover shield 140 includes a double-sided tape (not shown) as an adhesive means, and when the cover shield 140 is attached to the rear surface of the backlight assembly 120, the double-sided tape covers the bottom of the backlight assembly 120. The cover shield 140 is fixed to the backlight assembly 120 by being adhered to the 123.

The board assembly 110 includes a liquid crystal cell 111 in which a first substrate and a second substrate are bonded to each other with a liquid crystal layer interposed therebetween, and a first polarizing film attached to an outer surface of the liquid crystal cell 111. A liquid crystal panel comprising a 111a and a second polarizing film 111b,

And a circuit portion including a printed circuit board 112 for receiving and processing signals from a PC and the like, and a TCP 113 in which a driver IC (not shown) for applying a signal to the liquid crystal panel is stacked.

The backlight assembly 120 is disposed on the bottom surface of the board assembly 110 and a lamp (not shown) for irradiating light, and the light proceeds toward the board assembly 110 to increase utilization efficiency of the light irradiated through the lamp. A prism sheet 122b and other sheets that allow more light to be irradiated to the display area by using a reflector 121, a diffuser 122a that diffuses light onto the front surface, and diffuse reflection. An optical sheet layer 122 having a protective film 122c for protecting the optical sheet, a support main (not shown) for supporting and fixing the optical sheet layer 122 and the board assembly 110, and the components It is comprised including the cover bottom 123 which accommodates.

The case top 130 is coupled to an upper portion of the board assembly 110 mounted on the backlight assembly 120 to fix the board assembly 110 to the backlight assembly 120.

Although not shown, when the board assembly 110 is mounted on the backlight assembly 120, the TCP 113 portion of the board assembly is bent along the edge of the cover bottom 123. The printed circuit board 112 of the board assembly is positioned on the rear surface of the backlight assembly 120.

4 is a cross-sectional view illustrating a cross-sectional view of II through II 'of FIG. 3 to describe the cover shield in more detail in the liquid crystal display according to the first exemplary embodiment of the present invention.

As shown in FIG. 4, the cover shield 140 according to the first embodiment of the present invention has a distance d1 between the cover shield 140 and the cover bottom 123 at the portion to which the double-sided tape 141 is bonded. ) Is characterized by having a small bent portion (A) compared to the interval d2 between the cover shield 140 and the printed circuit board 112.

That is, in order for the cover shield 140 to be coupled to the cover bottom 123, the thickness of the double-sided tape 141 should be equal to the gap between the cover shield 140 and the cover bottom 123, and the cover shield 140 By having the bent portion (A) has an effect that the double-sided tape 141 can be easily adhered to the cover bottom 123.

In addition, the double-sided tape can replace the effect of grounding through the screw in the prior art by grounding the cover shield to the cover bottom using a conductive tape such as aluminum conductive tape.

5 is a cross-sectional view illustrating a cross section of a part corresponding to II to II ′ of FIG. 3 in the liquid crystal display according to the second exemplary embodiment of the present invention.

In the liquid crystal display according to the second embodiment of the present invention, as described in the first embodiment, a cover shield 140 having double-sided tape 141 as an adhesive means and having a bent portion A, and the cover shield. It characterized in that it comprises a cover bottom 123, the first structure 142 is formed along the edge of the region to which the double-sided tape 141 of 140 is bonded.

As described above, the first structure 142 formed along the edge of the region where the double-sided tape 141 is bonded guides the double-sided tape 141 when the double-sided tape 141 is bonded to the cover bottom 123. The guide may shorten the time for coupling the cover shield 140.

In FIG. 5, the first structure 142 is illustrated as an integrated body with the cover bottom 123, but a structure in which the first structure 142 is additionally coupled to the cover bottom 123 may be possible.

In addition, the first structure 142 may be formed on a portion of the cover bottom 123 along the edge of the region to which the double-sided tape 141 is bonded as shown in FIG. 5B.

6 is a cross-sectional view illustrating a portion of the liquid crystal display according to the third exemplary embodiment of the present invention, which corresponds to portions II to II 'of FIG. 3.

The liquid crystal display according to the third exemplary embodiment of the present invention includes a cover shield 140 including double-sided tape 141 as an adhesive means and a double-sided tape 141 in the cover shield, as shown in FIG. It characterized in that it comprises a cover bottom 123, the second structure 143 is formed in a portion corresponding to the portion.

The second structure 143 has a gap d3 between the cover shield 140 and the cover bottom 123 at a portion to which the double-sided tape 141 is bonded, and the printed circuit board 112 and the cover shield 140 are separated from each other. By making it smaller than the interval d4, the double-sided tape 141 is easily adhered to the cover bottom 123.

In FIG. 6, the second structure 143 is integrally shown with the cover bottom 123, but a structure that is additionally coupled to the cover bottom 123 may be possible.

In addition, the second structure may be formed in a portion of the area where the double-sided tape is bonded to the cover bottom.

FIG. 7A is a perspective view of a liquid crystal display according to a fourth exemplary embodiment of the present invention, and FIG. 7B is a cross-sectional view illustrating a cross section of part III to III 'of FIG. 7A.

As shown in FIG. 7B, the liquid crystal display according to the fourth exemplary embodiment of the present invention includes a cover shield 140 including a conductive double-sided tape 144 as an adhesive means, and the cover shield 140. The conductive double-coated tape 144 provided at the top surface) is bonded to the area B bent along the side of the backlight assembly in the case top 130.

Thus, by attaching a conductive double-sided tape to the case top, the effect of grounding the cover shield to the case top can be obtained.

Next, the manufacturing method of the liquid crystal display device by the technical idea of this invention is demonstrated.

The manufacturing method of the liquid crystal display device by this invention is

Forming a board assembly including a liquid crystal panel, mounting the board assembly to a backlight assembly including a cover bottom, and coupling a case top to the backlight assembly to fix the board assembly to the backlight assembly And attaching a cover shield having an adhesive means to the back surface of the backlight assembly.

That is, in the manufacturing method of the liquid crystal display according to the prior art, compared to fixing the cover shield through the two steps of placing the cover shield on the back of the backlight assembly, and the step of coupling the cover shield using a screw,

The manufacturing method of the liquid crystal display device according to the present invention is characterized by fixing the cover shield to the backlight assembly by attaching the cover shield to the back surface of the backlight assembly using a cover shield provided with an adhesive means.

The cover shield and the cover bottom may use the cover shield and the cover bottom described in the first to fourth embodiments of the liquid crystal display according to the present invention, and may be used within the scope of the technical idea of the present invention. Branch replacement, modified cover shields and cover bottoms will also be available.

By using the cover shield provided with the adhesive means as described above, the cover shield is fixed to the backlight assembly without a screw, thereby achieving an effect such as increased cost competitiveness through reduced screw cost and increased productivity through reduced process tack-time. .

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

The liquid crystal display of the present invention as described above and a method of manufacturing the same have the following effects.

First, by not using a screw to secure the cover shield, it is possible to reduce the cost of the screw to reduce the production cost.

Second, by placing the cover shield on the back of the backlight assembly, and by using a screw to secure the cover shield to a two-step process of attaching and fixing the cover shield, there is an effect of increasing the productivity.

Third, there is an effect of grounding the cover shield to the cover bottom or the case top using a conductive double-sided tape as a means for bonding the cover shield.

Claims (14)

A board assembly including a liquid crystal panel and a printed circuit board to implement an image; A backlight assembly including a cover bottom for receiving the board assembly; A case top coupled to an upper portion of the board assembly to fix the board assembly to the backlight assembly; A cover shield coupled to the cover bottom to receive the printed circuit board disposed on a rear surface of the backlight assembly; And An adhesive means provided on a part of the cover shield, The area between the mutually coupled cover bottom and the cover shield is A first area in which the cover bottom and the cover shield are spaced apart at a first interval and the printed circuit board is accommodated therein; And A second region spaced between the cover bottom and the cover shield at a second interval smaller than the first gap, and having the adhesive means interposed so that the cover shield is fixed to the rear surface of the cover bottom, And the second gap corresponds to a thickness of the bonding means. The method of claim 1, And said adhesive means is a double-sided tape. The method of claim 1, And the cover shield includes a bent portion that is bent at least three times so that the first and second regions are generated. The method of claim 3, And the cover bottom includes a structure protruding along an edge of a region to which the bonding means is bonded to guide the bonding means of the cover shield. The method of claim 1, And the cover bottom includes a structure protruding toward the cover shield to correspond to the second area so that the first and second areas are generated. delete The method of claim 1, And said adhering means is a conductive double-sided tape. Preparing a liquid crystal panel facing each other with the liquid crystal layer interposed therebetween, Preparing a board assembly by combining a printed circuit board to transmit a signal to the liquid crystal panel; Mounting the board assembly to a backlight assembly including a cover bottom, Coupling a case top to the top of the board assembly, Coupling a cover shield to a rear surface of the cover bottom to receive the printed circuit board disposed on a rear surface of the backlight assembly; In the step of coupling the cover shield to the back of the cover bottom, by using an adhesive means provided on at least a portion of the cover shield, the cover shield is fixed to the back of the cover bottom, The area between the mutually coupled cover bottom and the cover shield is A first area in which the cover bottom and the cover shield are spaced apart at a first interval and the printed circuit board is accommodated therein; And A second region spaced between the cover bottom and the cover shield at a second interval smaller than the first gap, and having the adhesive means interposed so that the cover shield is fixed to the rear surface of the cover bottom, And wherein the second interval corresponds to a thickness of the adhesion means. 9. The method of claim 8, In the step of coupling the cover shield to the back of the cover bottom, And said adhesive means is a double-sided tape. 10. The method of claim 9, In the step of coupling the cover shield to the back of the cover bottom, And the cover shield has a bent portion that is bent at least three times so that the first and second regions are generated. The method of claim 10, In the step of coupling the cover shield to the back of the cover bottom, And guiding the bonding means to the cover bottom by using a structure protruding toward the cover shield along an edge of a region of the cover bottom to which the bonding means is bonded. 9. The method of claim 8, In the step of coupling the cover shield to the back of the cover bottom, And the cover bottom includes a structure protruding to the cover shield side corresponding to the second area so that the first and second areas are generated. delete 9. The method of claim 8, And said adhesive means is a conductive double-sided tape.

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