KR20100131764A - Liquid crystal display device - Google Patents

Abstract

PURPOSE: A liquid crystal display device is provided to improve the reliability of a conductive tape by preventing the separation of a conductive tape through the formation of first to fifth patterns in a region in which tensile stress occurs. CONSTITUTION: A bottom cover(170) includes a light source which provides light to a lower portion of a liquid crystal pane(110), and a conductive tape(200) is attached to one side of the bottom cover and the one side of the liquid crystal panel. A first pattern is placed on a central region of the conductive tape, and second and thirds patterns are formed on the both sides of the first pattern.

Description

[0001] LIQUID CRYSTAL DISPLAY DEVICE [0002]

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 capable of improving defects caused by static electricity.

Cathode ray tube (CRT), one of the widely used display devices, is mainly used for monitors such as TVs, measuring devices, and information terminal devices, but the size and weight of electronic products are reduced due to the weight and size of CRT itself. Could not actively respond to the response.

As a solution to this problem, the liquid crystal display device has a tendency that its application range is gradually widening due to the features such as light weight, thinning, low power consumption driving. Accordingly, in order to meet the needs of users, liquid crystal display devices are progressing in the direction of large area, thinning, and low power consumption.

BACKGROUND ART A liquid crystal display device is a display device that displays an image by controlling an amount of light passing through a liquid crystal, and is widely used for advantages such as thinning and low power consumption.

Unlike the CRT, the liquid crystal display is not a display device that emits light by itself, and thus, a backlight unit including a separate light source is provided on the back of the liquid crystal display panel to provide light for visually representing an image.

The liquid crystal display panel is supported by the panel guide, and the panel guide is coupled to the bottom cover of the backlight unit.

In such a liquid crystal display device, static electricity may be generated by flow or friction. Static electricity refers to the accumulation of a specific charge by friction or peeling, and discharges energy and changes to a low energy state by discharge.

When the static electricity is discharged, the voltage is so high that the impact on the electronic product occurs. Since fine patterns and thin film transistors are formed in the liquid crystal display panel, when the electrostatic discharge occurs, a problem may occur in that the wiring is shorted or the thin film transistor is damaged and abnormally driven. There was a problem of lowering the display quality of the liquid crystal display panel.

An object of the present invention is to provide a liquid crystal display device that can improve the defect caused by static electricity.

Liquid crystal display device according to an embodiment of the present invention,

A liquid crystal display panel; A bottom cover accommodating a light source for providing light under the liquid crystal display panel; And a conductive tape attached to one side of the liquid crystal display panel and one side of the bottom cover, wherein the conductive tape has a comb pattern formed on an area corresponding to the gap between the liquid crystal display panel and the bottom cover. It features.

According to the present invention, the first to fifth patterns cut in the tensile stress generation region are formed to prevent separation due to tensile stress in response to a temperature change of the conductive tape for preventing damage to the liquid crystal display panel by static electricity. The separation of the conductive tape can be prevented to improve the reliability of the conductive tape. That is, the present invention has the effect of preventing the display quality degradation due to static electricity.

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

1 is an exploded perspective view illustrating a liquid crystal display device according to an exemplary embodiment of the present invention, and FIG. 2 is a view illustrating a peripheral area of the conductive tape of FIG. 1.

3 is a cross-sectional view illustrating a liquid crystal display device taken along the line II ′ of FIG. 1, and FIG. 4 is a plan view illustrating the conductive tape of the present invention.

1 to 4, a liquid crystal display according to an exemplary embodiment of the present invention is provided with a liquid crystal display panel 110 on which an image is displayed, and is disposed under the liquid crystal display panel 110 to provide light. It includes a backlight unit 120 to.

Although not shown in the drawings, the liquid crystal display of the present invention further includes a top case (not shown) surrounding the edge of the upper surface of the liquid crystal display panel 110 and fixed to the backlight unit 120.

Although not shown in detail, the liquid crystal display panel 110 is bonded to a thin film transistor (TFT) substrate and a color filter substrate to maintain a uniform cell gap facing each other, and a liquid crystal layer interposed between the two substrates. It includes. In the thin film transistor substrate, a plurality of gate lines are formed, a plurality of data lines intersecting the plurality of gate lines are formed, and a thin film transistor TFT is formed at an intersection area of the gate line and the data line.

A gate driving printed circuit board (113) for supplying a scan signal to a gate line is provided at an edge of the liquid crystal display panel 110, and a data driving printed circuit board (115) for supplying a data signal to a data line. ) Is provided.

The gate and data driving PCBs 113 and 115 are electrically connected to the liquid crystal display panel 110 by a chip on film 117. Here, the COF 117 may be changed to a tape carrier package (TCP).

The backlight unit 120 is disposed in parallel with the bottom cover 170 having an upper surface, a light source 150 provided on at least one inner side of the bottom cover 170, and the light source 150. The light guide plate 140 converts light incident from the light source 150 into surface light.

The backlight unit 120 is disposed on the light guide plate 140 to collect and diffuse light, and the light is disposed below the light guide plate 140 and proceeds to the lower surface of the light guide plate 140. The reflective sheet 160 further reduces light loss by reflecting the light toward the liquid crystal display panel 110.

Although not shown in the drawing, the backlight unit 120 is accommodated in the bottom cover 170 to support the main (not shown) for accommodating the light source 150, the light guide plate 140, and the optical sheets 130. It includes more.

The light guide plate 140 is made of a poly methly methacrylate (PMMA) material, and although not shown in detail, the light guide plate 140 may have a wedge shape in which the thickness becomes thinner as the light source 150 moves away from the incident surface. A prism pattern for refracting incident light in the direction of the optical sheets 130 may be formed on the rear surface of the light guide plate 140.

The optical sheets 130 include a diffusion sheet for diffusing light, a light collecting sheet for condensing light, and a protective sheet for protecting the light collecting sheet.

The light source 150 may include a light emitting diode (LED) as a point light source in addition to the lamp, and is provided to surround the light source 150 to further guide the light emitted from the light source 150 toward the light guide plate 160. It may include.

The bottom cover 170 is made of a metal material, and although not shown in the drawing, a control printed circuit board (PCB) is disposed on the bottom surface of the bottom cover 170.

One side of the liquid crystal display panel 110 is provided with a plurality of conductive tapes 200 for removing static electricity flowing into the liquid crystal display panel 110.

More specifically, the upper and lower surfaces of the liquid crystal display panel 110 are attached to the polarizing film (POL), the conductive tape 200 is not attached to the polarizing film (POL), the liquid crystal display panel 110 It is attached to the edge of the color filter substrate or the thin film transistor substrate.

The conductive tape 200 has a rectangular pad shape having long sides and short sides.

One side of the conductive tape 200 is attached to the edge of the liquid crystal display panel 110, and the other side is attached to the top and side surfaces of the bottom cover 170.

Here, although not shown in the drawing, an adhesive material is applied to one surface of the conductive tape 200.

The conductive tape 200 has a function of electrically connecting the liquid crystal display panel 110 and the metal bottom cover 170 to remove static electricity generated by friction during manufacturing of the liquid crystal display device.

That is, the conductive tape 200 discharges the static electricity generated in the liquid crystal display panel 110 toward the bottom cover 170, thereby preventing damage of the liquid crystal display panel 110 by static electricity.

Here, the conductive tape 200 has a limited structure for electrically connecting the liquid crystal display panel 110 and the bottom cover 170 to remove static electricity. However, the conductive tape 200 is not limited thereto. It may include a structure for electrically connecting the top case (not shown) surrounding the edge and the liquid crystal display panel 110.

The conductive tape 200 may generate tensile stress due to shrinkage / expansion according to temperature change, and may be formed in the region attached to the liquid crystal display panel 110 or the region attached to the bottom cover 170 by the tensile stress. Deviation of 200 may occur. Here, the region i in which the tensile stress is generated may be defined as a gap between the side surface of the liquid crystal display panel 110 and the side surface of the bottom cover 170 corresponding thereto.

A comb pattern is formed in the conductive tape 200 corresponding to the region i where the tensile stress is generated.

The comb pattern is cut to cancel the tensile stress of the conductive tape 200, and when a tensile stress occurs, the conductive tape 200 is stretched to the area around the comb pattern, thereby increasing the conductive tape ( The departure of 220 may be prevented.

In the comb pattern, a first pattern 210 is formed at an intermediate point, and second and third patterns 220 and 230 are formed at both sides of the first pattern 210, and the second pattern 220 is formed. The fourth pattern 240 is formed in the outward direction, and the fifth pattern 250 is formed in the outward direction of the third pattern 230.

The first pattern 210 includes first and second cutouts 211 and 213 inclined to be symmetrical with each other. The first and second cutouts 211 and 213 have a narrow angle of inclination toward the bottom cover 170 and are connected to each other.

The second pattern 220 includes third and fourth cutouts 221 and 223 inclined to be symmetrical with each other. The third and fourth cutouts 221 and 223 have a narrow angle of inclination in the direction of the liquid crystal display panel 110 and are connected to each other.

The fourth cutout 223 is spaced apart from the first cutout 211 by a predetermined interval and is formed in parallel.

The third pattern 230 includes fifth and sixth cutouts 231 and 233 that are inclined to be symmetrical with each other. The fifth and sixth cutouts 231 and 233 have a narrow angle of inclination toward the liquid crystal display panel 210 and are connected to each other.

The fifth cutout 231 is spaced apart from the second cutout 213 by a predetermined interval and is formed in parallel.

The fourth pattern 240 is a cut out structure and is formed in parallel with the third cutout 221 at a predetermined interval.

The fifth pattern 250 has a cut structure and is formed in parallel with the sixth cutout 233 at a predetermined interval.

A round groove 260 is formed at one side of the conductive tape 200.

The round groove 260 is formed in order to prevent a mounting error (attachment in the opposite direction) by the worker in the attachment process of the conductive tape 200.

In an embodiment of the present invention, an area in which the round groove 260 is formed is attached to the bottom cover 170.

As described above, the first to fifth patterns 210, 220, 230, 240, and 250 are formed in the region (i) where the tensile stress of the conductive tape 200 is generated, so that the conductive tape 200 is generated when the tensile stress is generated. By increasing the length of the conductive tape 200, the separation of the conductive tape 200 can be prevented.

The present invention includes first to first cuts in the tensile stress generating region (i) so as to prevent the separation due to the tensile stress due to the temperature change of the conductive tape 200 to prevent damage to the liquid crystal display panel by static electricity. By forming the five patterns 210, 220, 230, 240, and 250, separation of the conductive tape 200 may be prevented, thereby improving reliability of the conductive tape 200. That is, the present invention has the effect of preventing the display quality degradation due to static electricity.

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 illustrating a liquid crystal display according to an exemplary embodiment of the present invention.

FIG. 2 is a diagram illustrating a peripheral area of the conductive tape of FIG. 1.

3 is a cross-sectional view illustrating a liquid crystal display device taken along the line II ′ of FIG. 1.

4 is a plan view showing the conductive tape of the present invention.

Claims (10)

A liquid crystal display panel; A bottom cover accommodating a light source for providing light under the liquid crystal display panel; And And a conductive tape attached to one side of the liquid crystal display panel and one side of the bottom cover. And the conductive tape has a comb-tooth pattern formed in an area corresponding to the gap between the liquid crystal display panel and the bottom cover. According to claim 1, The comb pattern is, A first pattern positioned in an intermediate region of the conductive tape; Second and third patterns formed on both sides of the first pattern; A fourth pattern formed outside the second pattern; And And a fifth pattern formed outside the third pattern. The method of claim 2, And the first pattern includes first and second cutouts that are inclined to each other, and the first and second cutouts are inclined in the bottom cover direction and are connected to each other. The method of claim 2, And the second pattern includes third and fourth cutouts that are inclined to be symmetrical to each other, and the third and fourth cutouts are connected to each other by narrowing an inclination angle toward the liquid crystal display panel. The method according to claim 3 and 4, And the fourth cutout is formed in parallel with a predetermined interval spaced apart from the first cutout. The method of claim 2, And the third pattern includes fifth and sixth cutouts that are inclined to be symmetrical to each other, and the fifth and sixth cutouts are narrowed in an inclination angle toward the liquid crystal display panel and connected to each other. The method according to claim 3 and 6, And the fifth cutout is formed in parallel with a predetermined interval spaced apart from the second cutout. The method according to claim 2 and 4, And the fourth pattern has a cut out structure and is parallel to the third cutout at a predetermined interval. The method according to claim 2 and 6, And the fifth pattern has a cut out structure, and is formed in parallel with the sixth cutout at a predetermined interval. According to claim 1, One side of the conductive tape is a liquid crystal display, characterized in that a round groove for displaying the attachment direction is formed.

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