KR20050053282A - Liquid crystal display device and method assembling thereof - Google Patents

Abstract

The present invention relates to a liquid crystal display device and a method for assembling thereof, which structurally improves the bending strength of a liquid crystal display device and prevents light leakage due to warpage.

An LCD according to an exemplary embodiment of the present invention includes a liquid crystal panel, a backlight unit for irradiating light to the liquid crystal panel, a support main for accommodating the backlight unit and the liquid crystal panel, a rear edge of the support main, And a case surrounding the side, and a tape surrounding the edge of the liquid crystal panel and the side of the case.

The present invention can reinforce the structural strength of the liquid crystal display by wrapping the back edge and side of the support main using a case. Therefore, the present invention prevents light leakage from the front upper side due to the lifting phenomenon due to torsion / warping due to the impact from the outside.

Description

Liquid crystal display and its assembly method {LIQUID CRYSTAL DISPLAY DEVICE AND METHOD ASSEMBLING THEREOF}

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 and a method for assembling thereof, which can structurally improve the bending strength of a liquid crystal display device to prevent light leakage due to warping.

The liquid crystal display device includes a liquid crystal panel in which liquid crystal cells are arranged in a matrix form between two glass substrates, and a back light unit for irradiating light to the liquid crystal panel. In addition, in the liquid crystal display, optical sheets for vertically raising light traveling from the backlight unit toward the liquid crystal panel are arranged. The liquid crystal panel, the backlight unit and the optical sheet should be fastened in an integrated form to prevent light loss and should be protected from damage by external impact. To this end, a case for a liquid crystal display device formed to surround the backlight unit and the optical sheets including the edge of the liquid crystal panel is provided.

1 and 2, a conventional liquid crystal display device includes a support main 24, an edge type backlight unit and a liquid crystal panel 6 stacked inside the support main 24, and a liquid crystal. A case top 2 is provided to surround the edge of the panel 6 and the side surface of the support main 24.

The support main 24 is a mold, and the side wall surface thereof is formed into a stepped stepped surface, and the edge type backlight unit and the liquid crystal panel 6 are stacked on the stepped surface.

The liquid crystal panel 6 includes an upper substrate 5 and a lower substrate 3. A liquid crystal layer (not shown) is formed between the upper substrate 5 and the lower substrate 3 of the liquid crystal panel 6, and is shown to maintain a constant gap between the upper substrate 5 and the lower substrate 3. A spacer not provided.

On the upper substrate 5 of the liquid crystal panel 6, a color filter, a common electrode, a black matrix, and the like, which are not shown, are formed. In this case, the common electrode may be formed on the lower substrate 3 according to the liquid crystal mode of the liquid crystal panel 6. In addition, signal wirings such as data lines and gate lines (not shown) are formed on the lower substrate 3 of the liquid crystal panel 6, and thin film transistors ("TFTs") are formed at intersections of the data lines and the gate lines. Is formed. The TFT switches the data signal to be transmitted from the data line toward the liquid crystal cell in response to the scan signal (gate pulse) from the gate line. The pixel electrode is formed in the pixel region between the data line and the gate line.

In addition, data and gate pad regions connected to the data lines and the gate lines, respectively, are formed at one side of the liquid crystal panel 6. In the data pad region, a plurality of tape tape carrier packages (hereinafter referred to as "TCP") 8 in which data driving integrated circuits 10 for supplying data signals to data lines are mounted are attached. A plurality of gates TCP 4 mounted with a gate driving integrated circuit 12 for supplying scan (gate) pulses to the gate lines are attached to the gate pad region. Each of the plurality of data TCPs 8 is attached to the data printed circuit board 20, and the plurality of gates TCP 4 are attached to the gate printed circuit board 26. Each of the data printed circuit board 20 and the gate printed circuit board 26 is folded to the rear surface of the support main 24.

The upper polarizing sheet 7a is attached to the upper substrate 5 of the liquid crystal panel 6, and the lower polarizing sheet 7b is attached to the rear surface of the lower substrate 3. At this time, the upper and lower polarizing sheets 7a and 7b serve to extend the viewing angle of the image displayed by the liquid crystal cell matrix.

The edge type backlight unit includes a light guide plate 16 for advancing light incident through an incident surface provided on one side toward the liquid crystal panel 6, a lamp 50 disposed to face one side of the light guide plate 16, and A lamp housing 56 that wraps the lamp 50 and surrounds the incident surface of the light guide plate 16, a reflective sheet 18 disposed on the rear surface of the light guide plate 16, and a plurality of stacked on the light guide plate 16. With optical sheets 14.

The lamp 50 is composed of a glass tube, inert gases inside the glass tube, and a cathode and an anode installed at both ends of the glass tube. Inert gas is filled in the glass tube, and phosphor is coated on the inner wall of the glass tube. When the lamp 50 is applied with a high-voltage alternating voltage supplied from a lamp driving device (not shown) to the high voltage electrode, electrons are emitted and collide with inert gases in the glass tube to increase the amount of electrons exponentially. As the electric current flows inside the glass tube by the increased electrons, energy is generated as the inert gas (Ar, Ne) is excited by the electrons, and the energy is emitted while the energy excites mercury. This ultraviolet light impinges on the luminescent phosphor applied to the inner wall of the glass tube to emit visible light.

The lamp housing 56 is formed in a “U” shape to wrap the lamp 50 and surround the incident surface of the light guide plate 16. This lamp housing 56 reflects the light emitted from the lamp 50 to be irradiated to the incident surface of the light guide plate 16.

The light guide plate 16 converts a path of light from the lamp 50 through the incident surface and proceeds toward the liquid crystal panel 6.

The reflective sheet 18 serves to reduce light loss by re-reflecting light incident to itself through the rear surface of the light guide plate 16 toward the light guide plate 16.

When the light incident on the liquid crystal panel 6 is perpendicular to the liquid crystal panel 6, the light efficiency is increased. To this end, the plurality of optical sheets 14 converts the diffusion sheet for diffusing the light emitted from the light guide plate 16 to the entire area and the angle of propagation of the light diffused by the diffusion sheet to be perpendicular to the liquid crystal panel 6. It consists of a prism sheet.

The case top 2 is bent to surround the side of the support main 24 in which the edge type backlight unit and the liquid crystal panel 6 are accommodated and the edge of the liquid crystal panel 6. The support main 24 and the case top 2 are fastened by screws (not shown). Since the case top 2 surrounds the edge of the liquid crystal panel 6 and the side surface of the support main 24, the case top 2 is manufactured in the form of a square band that is bent in the form of the letter L (L).

In this method of assembling a general liquid crystal display device, an edge type backlight unit is stacked on an inner step surface of the support main 24, and then the liquid crystal panel 6 is mounted on the edge type backlight unit. Then, the case top 2 is fastened to the support main 24 to surround the side of the support main 24 and the edge of the liquid crystal panel 6 in which the edge type backlight unit and the liquid crystal panel 6 are accommodated. .

Such a general liquid crystal display device has a limitation in preventing twist / bending due to impact because the structural strength of the case top 2 bent in the form of the letter L (L) is weak. Accordingly, in the general liquid crystal display device, light leakage occurs in the upper front side due to the floating of the case top 2 due to the twist / warp caused by the impact from the outside.

Accordingly, an object of the present invention is to provide a liquid crystal display device and a method for assembling thereof, which can structurally improve the bending strength of a liquid crystal display device to prevent light leakage due to the warpage.

In order to achieve the above object, a liquid crystal display device according to an embodiment of the present invention, a liquid crystal panel, a backlight unit for irradiating light to the liquid crystal panel, a support main for housing the backlight unit and the liquid crystal panel, And a case surrounding the rear edge and the side of the support main, and a tape surrounding the edge of the liquid crystal panel and the side of the case.

In the liquid crystal display, the case may include a rectangular band bent in an “L” shape to surround the rear edge and the side surface of the support main, and a reinforcing rib formed between the inner wall of the rectangular band. .

In the LCD, the reinforcing ribs are formed in a “+” shape.

In the liquid crystal display, the reinforcement ribs may include a plurality of vertical reinforcement ribs that are parallel to each other at predetermined intervals, and horizontal reinforcement ribs that are parallel to each other at predetermined intervals so as to intersect the plurality of vertical reinforcement ribs.

The method of assembling the liquid crystal display device according to the embodiment of the present invention includes the steps of accommodating a liquid crystal panel and a backlight unit for irradiating light to the liquid crystal panel in a support main, and a case to surround the back edge and side of the support main. Assembling, and surrounding the edge of the liquid crystal panel and the side of the case using a tape.

In the method of assembling the liquid crystal display, the case may include a rectangular band bent in an “L” shape to surround the rear edge and the side surface of the support main, and a reinforcing rib formed between the inner wall of the rectangular band. It is done.

In the assembling method of the liquid crystal display device, the reinforcing rib is formed in a "+" shape.

In the method of assembling the liquid crystal display, the reinforcing ribs may include a plurality of vertical reinforcing ribs that are arranged at the predetermined intervals, and horizontal reinforcing ribs that are arranged at predetermined intervals so as to intersect the plurality of vertical reinforcing ribs.

Other objects and features of the present invention in addition to the above object will be apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 3 to 8.

3 and 4, an LCD according to an exemplary embodiment of the present invention includes a support main 124, an edge type backlight unit and a liquid crystal panel stacked inside the support main 124. 106, a case 102 for enclosing the edge of the liquid crystal panel 106 and the back edge and side of the support main 124, and attached to the edge of the liquid crystal panel 106 and the side of the case 102. A tape 170 is provided.

The support main 124 is a mold, and the side wall surface thereof is formed into a stepped stepped surface, and the edge type backlight unit and the liquid crystal panel 106 are stacked on the stepped surface.

The liquid crystal panel 106 includes an upper substrate 105 and a lower substrate 103. A liquid crystal layer (not shown) is formed between the upper substrate 105 and the lower substrate 103 of the liquid crystal panel 106, and illustrated to maintain a constant gap between the upper substrate 105 and the lower substrate 103. A spacer not provided.

The upper substrate 105 of the liquid crystal panel 106 is formed with a color filter, a common electrode, a black matrix, and the like, not shown. In this case, the common electrode may be formed on the lower substrate 103 according to the liquid crystal mode of the liquid crystal panel 106. In addition, signal lines such as data lines and gate lines (not shown) are formed on the lower substrate 103 of the liquid crystal panel 106, and thin film transistors ("TFTs") at the intersections of the data lines and the gate lines. Is formed. The TFT switches the data signal to be transmitted from the data line toward the liquid crystal cell in response to the scan signal (gate pulse) from the gate line. The pixel electrode is formed in the pixel region between the data line and the gate line.

In addition, data and gate pad regions connected to the data lines and the gate lines, respectively, are formed at one side of the liquid crystal panel 106. A data tape carrier package 108 (hereinafter referred to as "TCP") 108 having a data driving integrated circuit 110 for supplying data signals to data lines is attached to the data pad area. A plurality of gate TCPs 104 mounted with gate driving integrated circuits 112 for supplying scan (gate) pulses to the gate lines are attached to the gate pad region. Each of the plurality of data TCPs 108 is attached to the data printed circuit board 120, and the plurality of gates TCP 104 are attached to the gate printed circuit board 126. Each of the data printed circuit board 120 and the gate printed circuit board 126 is folded to the rear surface of the support main 124.

The upper polarizing sheet 107a is attached to the upper substrate 105 of the liquid crystal panel 106, and the lower polarizing sheet 107b is attached to the rear surface of the lower substrate 103. At this time, the upper and lower polarizing sheets 107a and 107b are responsible for extending the viewing angle of the image displayed by the liquid crystal cell matrix.

The edge type backlight unit includes a light guide plate 116 for advancing light incident through an incident surface provided on one side toward the liquid crystal panel 106, a lamp 150 disposed to face one side of the light guide plate 116, and A lamp housing 156 that wraps the lamp 150 and surrounds the incident surface of the light guide plate 116, a reflective sheet 118 disposed on the rear surface of the light guide plate 116, and a plurality of stacked on the light guide plate 116. Optical sheets 114.

The lamp 150 is composed of a glass tube, inert gases inside the glass tube, and a cathode and an anode installed at both ends of the glass tube. Inert gas is filled in the glass tube, and phosphor is coated on the inner wall of the glass tube. When the high voltage AC voltage supplied from the lamp driving device (not shown) is applied to the high voltage electrode, the lamp 150 may emit electrons and collide with inert gases inside the glass tube to increase the amount of electrons exponentially. As the electric current flows inside the glass tube by the increased electrons, energy is generated as the inert gas (Ar, Ne) is excited by the electrons, and the energy is emitted while the energy excites mercury. This ultraviolet light impinges on the luminescent phosphor applied to the inner wall of the glass tube to emit visible light.

The lamp housing 156 is formed in a “U” shape to wrap the lamp 150 and surround the incident surface of the light guide plate 116. The lamp housing 156 reflects the light emitted from the lamp 150 to irradiate the incident surface of the light guide plate 116.

The light guide plate 116 converts a path of light from the lamp 150 through the incident surface and moves toward the liquid crystal panel 106. Meanwhile, when the liquid crystal display according to the exemplary embodiment of the present invention is used for a monitor or a notebook requiring high brightness, lamps 150 may be provided on each of opposite sides of the light guide plate 116.

The reflective sheet 118 serves to reduce light loss by re-reflecting light incident to the light through the rear surface of the light guide plate 116 toward the light guide plate 116.

When the light incident on the liquid crystal panel 106 is perpendicular to the liquid crystal panel 106, the light efficiency is increased. To this end, the plurality of optical sheets 114 may be configured to convert the diffusion sheet for diffusing the light emitted from the light guide plate 116 into the entire area, and the traveling angle of the light diffused by the diffusion sheet to be perpendicular to the liquid crystal panel 106. It consists of a prism sheet.

The case 102 is manufactured in the form of a square band bent in the shape of the letter L (L) to surround the back edge and side of the support main 124 in which the edge type backlight unit and the liquid crystal panel 106 are accommodated. In addition, the back of the case 102 is formed with a reinforcing rib 160 having a cross shape (+) as shown in FIG. The reinforcing rib 160 supports the rear surface of the support main 124 as shown in FIG. 6 and reinforces the structural strength of the case 102. The case 102 is fastened by the support main 124 and the case 102 by screws (not shown).

Meanwhile, as shown in FIG. 7, a plurality of horizontal reinforcing ribs 162 parallel to each other at predetermined intervals and a plurality of horizontal reinforcing ribs 164 parallel to each other are formed in a matrix form on the back of the case 102. . Such another type of case 102 may be further improved in structural strength by a plurality of vertical reinforcing ribs 162 and a plurality of horizontal reinforcing ribs 164 formed in a matrix form.

The tape 170 is a non-metallic or non-conductive insulating tape attached to the edge of the liquid crystal panel 106 and the side of the case 102. The tape 170 is attached to the edge of the liquid crystal panel 106 and the side surface of the case 102, as shown in FIG. 8, thereby preventing the liquid crystal panel 106 from flowing, and the side surface of the case 102. The support main 124 and the liquid crystal panel 106 are fixed.

As described above, in the method of assembling the liquid crystal display device according to the exemplary embodiment of the present invention, the edge type backlight unit is stacked on the inner step surface of the support main 124, and then the liquid crystal panel 106 is placed on the edge type backlight unit. Will be installed. Then, the case 102 is fastened to the support main 124 so as to surround the rear edge and the side surface of the support main 124 in which the edge type backlight unit and the liquid crystal panel 106 are accommodated. Subsequently, the tape 170 is attached to surround the edge of the liquid crystal panel 106 and the side surface of the case 102.

As described above, the liquid crystal display according to the exemplary embodiment of the present invention has a cross-shaped reinforcement rib 160 or a plurality of vertical and horizontal lines between the sidewalls of the case 102 bent in the form of the letter L (L). The ribs 162 and 164 are formed in a matrix to reinforce the structural strength of the case 102, thereby preventing the liquid crystal display device from twisting or warping due to an impact from the outside. Accordingly, the liquid crystal display according to the exemplary embodiment of the present invention prevents light leakage from the front side due to the lifting phenomenon caused by the twist / warp caused by the impact from the outside.

On the other hand, the liquid crystal display according to the embodiment of the present invention is formed on the bottom surface of the support main 124 to reinforce the structural strength of the support main 124 by assembling the case 102 on the back of the support main 124 Multiple ribs can be deleted.

As described above, the liquid crystal display according to the embodiment of the present invention and a method of assembling the liquid crystal display according to an embodiment of the present invention may form a cross-shaped reinforcing rib between inner sidewalls, or a case in which a plurality of vertical and horizontal reinforcing ribs are formed in a matrix form. And a tape surrounding the edge of the liquid crystal panel and the side of the case. Accordingly, the present invention can reinforce the structural strength of the liquid crystal display by wrapping the back edge and side of the support main using a case. Therefore, the present invention prevents light leakage from the front upper side due to the lifting phenomenon due to torsion / warping due to the impact from the outside.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present 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 schematically showing a conventional liquid crystal display device.

FIG. 2 is a cross-sectional view taken along the line II ′ shown in FIG. 1. FIG.

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

4 is a cross-sectional view taken along the line II-II ′ shown in FIG. 3.

5 is a perspective view showing a case shown in FIG.

FIG. 6 is a perspective view illustrating a case fastened to surround a rear edge and side surfaces of the support main illustrated in FIG. 3.

7 is a plan view showing another case of the type shown in FIG.

8 is a plan view showing a tape attached to the edge of the liquid crystal panel and the side of the case shown in FIG.

<Description of Symbols for Main Parts of Drawings>

2: case top 3, 103: lower substrate

4, 104: gate TCP 5, 105: upper substrate

6, 106: liquid crystal panel 8, 108: data TCP

7a, 107a: upper polarizing sheet 7b, 107b: lower polarizing sheet

10, 110: data driving integrated circuit 12, 112: gate driving integrated circuit

14, 114: optical sheets 16, 116, 216: light guide plate

18, 118: reflective sheet 20, 120: data printed circuit board

24, 124: support main 26, 126: gate printed circuit board

50, 150 lamp 56, 156 lamp housing

160: reinforcement rib 162: vertical reinforcement rib

164: horizontal reinforcement rib 170: tape

Claims (8)

LCD panel, A backlight unit for irradiating light onto the liquid crystal panel; A support main housing the backlight unit and the liquid crystal panel; A case surrounding the rear edge and side of the support main; And a tape surrounding edges of the liquid crystal panel and side surfaces of the case. The method of claim 1, The case, Square band bent in a "L" shape to surround the back edge and side of the support main, And a reinforcing rib formed between inner walls of the rectangular band. The method of claim 2, And the reinforcing rib is formed in a “+” shape. The method of claim 2, The reinforcement ribs, A plurality of vertical reinforcing ribs parallel to the predetermined interval; And horizontal reinforcing ribs arranged at a predetermined interval so as to intersect the plurality of vertical reinforcing ribs. Storing a liquid crystal panel and a backlight unit for irradiating light to the liquid crystal panel in a support main; Assembling the case to surround the back edge and side of the support main; Assembling the edge of the liquid crystal panel and the side surface of the case using a tape. The method of claim 5, The case, Square band bent in a "L" shape to surround the back edge and side of the support main, And a reinforcing rib formed between inner walls of the rectangular band. The method of claim 6, And the reinforcing ribs are formed in a "+" shape. The method of claim 6, The reinforcing rib, A plurality of vertical reinforcing ribs parallel to the predetermined interval; And horizontal reinforcing ribs arranged in parallel at predetermined intervals so as to intersect the plurality of vertical reinforcing ribs.