KR102283983B1 - Liquid crystal display device - Google Patents

Abstract

The liquid crystal display device of the present invention uses two materials, conductive and non-conductive, for the cover shield tape for grounding the rear ITO (Indium Tin Oxide) of the color filter substrate, except for the ground plane that requires conductivity. It is characterized in that by applying a non-conductive material to the remaining adhesive surface, a short circuit defect with the pads of the pad part is prevented.
Accordingly, it is possible to prevent screen abnormalities and improve reliability at the same time.

Description

Liquid crystal display device {LIQUID CRYSTAL DISPLAY DEVICE}

The present invention relates to a liquid crystal display, and more particularly, to a horizontal electric field mode liquid crystal display.

In the recent information society, the importance of display devices as a visual information delivery medium is further emphasized, and in order to occupy a major position in the future, it is necessary to satisfy requirements such as low power consumption, thinness, light weight, and high quality.

The display device is a cathode ray tube (CRT) that emits light by itself, an electroluminescence (EL), a light emitting diode (LED), a vacuum fluorescent display (VFD), and an electric field. It can be divided into light-emitting types such as field emission displays (FEDs) and plasma display panels (PDPs) and non-emission types such as liquid crystal displays (LCDs) that do not emit light by themselves. .

A liquid crystal display device is a device that expresses an image by using the optical anisotropy of liquid crystal, and it is in the spotlight as a display device because it has excellent visibility compared to conventional CRTs, and has smaller average power consumption compared to CRTs of the same screen size as well as a small amount of heat dissipation. there is.

Hereinafter, a general liquid crystal display device will be described.

In general, a liquid crystal display device can display a desired image by individually supplying data signals according to image information to pixels arranged in a matrix form, and adjusting light transmittance of the pixels.

Accordingly, the liquid crystal display device includes a liquid crystal panel in which pixels are arranged in a matrix form, a driver for driving the pixels, and a backlight unit for supplying light to the liquid crystal panel.

1 is an exploded perspective view schematically showing the structure of a general liquid crystal display device.

Referring to FIG. 1 , in a general liquid crystal display device, a liquid crystal panel 10 in which pixels are arranged in a matrix form to output an image, a driver (not shown) for driving the pixels, and a liquid crystal panel 10 are installed on the rear surface of the liquid crystal display device. It consists of a backlight unit 40 emitting light over the entire surface of the panel 10 , and a lower cover 50 accommodating and fixing the liquid crystal panel 10 and the backlight unit 40 .

The liquid crystal panel 10 has a color filter substrate 5 and an array substrate 15 bonded to each other to face each other to maintain a uniform cell gap, and a liquid crystal layer formed in the cell gap between the color filter substrate 5 and the array substrate 15 ( not shown).

Although not shown, a common electrode and a pixel electrode are formed in the liquid crystal panel 10 to which the color filter substrate 5 and the array substrate 15 are bonded, and an electric field is applied to the liquid crystal layer. When the voltage of the data signal applied to the pixel electrode is controlled, the liquid crystal of the liquid crystal layer rotates by dielectric anisotropy according to the electric field between the common electrode and the pixel electrode to transmit or block light for each pixel to display text or images. do.

At this time, in order to control the voltage of the data signal applied to the pixel electrode for each pixel, a switching element such as a thin film transistor (TFT) is individually provided in the pixels.

Upper and lower polarizing plates (not shown) are respectively attached to the outside of the liquid crystal panel 10 configured as described above, wherein the lower polarizing plate polarizes the light passing through the backlight unit 40 , and the upper polarizing plate is the liquid crystal panel 10 . polarizes the light passing through it.

When the backlight unit 40 is described in detail, a light emitting diode (LED) assembly 30 for emitting light is installed on one side of a light guide plate 42 , and the A reflecting plate 41 is provided on the rear surface.

In this case, the LED assembly 30 includes an LED array 31 and an LED printed circuit board (PCB) 32 for driving the LED array 31 .

The light emitted from the LED array 31 is incident on the side of the light guide plate 42 made of a transparent material, and the reflector 41 disposed on the rear surface of the light guide plate 42 transmits light transmitted through the rear surface of the light guide plate 42 to the light guide plate 42 . ) is reflected toward the optical sheets 43 on the upper surface to reduce light loss and improve uniformity.

A liquid crystal panel 10 including a color filter substrate 5 and an array substrate 15 is mounted on the upper portion of the backlight unit 40 configured as described above through the guide panel 45 , and a lower cover 50 is coupled to the lower portion thereof. This constitutes a liquid crystal display device.

In such a liquid crystal display device, various display modes exist according to the arrangement of liquid crystal molecules. Among them, the Twisted Nematic (TN) mode has advantages of easy black-and-white display, fast response, and low driving voltage. However, in the TN mode liquid crystal display device, liquid crystal molecules aligned horizontally with the substrate are aligned almost vertically with the substrate when a voltage is applied. Therefore, there is a problem that the viewing angle is narrowed when a voltage is applied due to the refractive anisotropy of the liquid crystal molecules.

In order to solve the viewing angle problem, various modes having wide viewing angle characteristics have been proposed, but among them, a horizontal electric field mode liquid crystal display device such as in-plane switching (IPS) is used. The IPS mode liquid crystal display aligns liquid crystal molecules in a plane by forming at least one pair of electrodes arranged in parallel in a pixel to form a horizontal electric field substantially parallel to the substrate.

However, in the IPS mode liquid crystal display device, static electricity is generated on the surface of the substrate, and such static electricity forms an electric field perpendicular to the liquid crystal panel. Accordingly, the horizontal electric field of the liquid crystal layer is distorted by this vertical electric field, so that the horizontal electric field applied to the liquid crystal layer is not completely parallel to the liquid crystal panel. As such, when the horizontal electric field is not parallel to the liquid crystal panel, liquid crystal molecules in the liquid crystal layer do not rotate on the same plane, resulting in a defect in the liquid crystal display.

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display device capable of preventing the generation of static electricity and preventing short circuit defects with pads of a pad part.

In addition, other objects and features of the present invention will be described in the following description of the invention and claims.

In order to achieve the above object, a liquid crystal display device according to an embodiment of the present invention includes a liquid crystal panel composed of a color filter substrate and an array substrate, a backlight unit positioned on the rear surface of the liquid crystal panel to supply light to the liquid crystal panel, and a liquid crystal panel and a lower cover for fixing the backlight unit to each other, and a cover shield tape attached to cover the lower surface of the lower cover from the upper surface of the color filter substrate to ground the color filter substrate.

In this case, one side of the array substrate may protrude from the color filter substrate to form a pad part.

In this case, the cover shield tape may have a double structure in which a non-conductive material is applied to the side surface of the liquid crystal panel including the pad part, and a conductive material is applied to the upper surface of the color filter substrate, which is an adhesive surface, and the lower surface of the lower cover.

It further includes a rear ITO (Indium Tin Oxide) positioned on the color filter substrate, and the cover shield tape may be attached to the upper surface of the rear ITO.

The cover shield tape may be bent from the upper surface of the color filter substrate to cover the lower surface of the lower cover and attached to the liquid crystal panel and the lower cover.

The cover shield tape may have a "T"-shape consisting of a straight upper end and a body extending vertically from the upper end to the lower end.

In this case, the upper part of the upper part is adhered to the color filter substrate, while the remaining upper part and the lower part cover the side surface of the liquid crystal panel, and the body may be attached to cover the lower surface of the lower cover through the side surface of the backlight unit.

In this case, a conductive material may be applied to the upper part of the upper part of the cover shield tape adhered to the upper surface of the rear ITO, and the ground surface of the body adhered to the side surface of the backlight unit and the lower surface of the lower cover.

On the other hand, as for the cover shield tape, a non-conductive material may be applied to the adhesive surface of the upper end that is adhered to the side surface of the liquid crystal panel including the pad part of the array substrate.

As described above, in the liquid crystal display device according to the present invention, the cover shield tape for grounding the rear ITO of the color filter substrate is applied to the remaining adhesive surface except for the grounding surface that requires conductivity by using two materials, conductive and non-conductive. It is characterized in that a short circuit defect with the pads of the pad part is prevented by applying a non-conductive material.

Accordingly, the present invention provides an effect of improving workability and reliability while preventing screen abnormalities.

1 is an exploded perspective view schematically showing the structure of a general liquid crystal display device;
2 is a view schematically showing a cross-sectional structure of a liquid crystal display according to an embodiment of the present invention.
3 is a plan view schematically showing a part of an array substrate in a liquid crystal display according to an embodiment of the present invention;
4A to 4C are plan views illustrating, for example, a shape of a cover shield tape according to an embodiment of the present invention.
5 is a perspective view schematically showing a liquid crystal display to which a cover shield tape is applied according to an embodiment of the present invention;
6A is a view for explaining a short circuit defect caused by a cover shield tape;
6B is a view for explaining that a short circuit defect is prevented by applying the cover shield tape according to the embodiment of the present invention.

Hereinafter, a preferred embodiment of the liquid crystal display according to the present invention will be described in detail with reference to the accompanying drawings so that a person skilled in the art can easily implement the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout. The sizes and relative sizes of layers and regions in the drawings may be exaggerated for clarity of description.

Reference to an element or layer to another element or “on” or “on” includes not only directly on the other element or layer, but also with other layers or other elements interposed therebetween. do. On the other hand, reference to an element "directly on" or "directly on" indicates that there are no intervening elements or layers.

The spatially relative terms "below, beneath", "lower", "above", "upper", etc. are one element or component as shown in the drawings. and can be used to easily describe the correlation with other devices or components. Spatially relative terms should be understood as terms including different orientations of the device during use or operation in addition to the orientation shown in the drawings. For example, if an element shown in the figures is turned over, an element described as "beneath" or "beneath" another element may be placed "above" the other element. Accordingly, the exemplary term “below” may include both directions below and above.

The terminology used herein is for the purpose of describing the embodiments, and thus is not intended to limit the present invention. As used herein, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, “comprise” and/or “comprising” refers to the presence of one or more other components, steps, operations and/or elements mentioned. or addition is not excluded.

2 is a diagram schematically showing a cross-sectional structure of a liquid crystal display according to an embodiment of the present invention. At this time, although FIG. 2 shows an edge type liquid crystal display device in which the light source is positioned on one side of the liquid crystal panel as an example, the present invention is not limited thereto. The present invention can also be applied to a liquid crystal display of a direct type in which the light source is located on the rear surface of the liquid crystal panel.

3 is a plan view schematically showing a part of an array substrate in a liquid crystal display according to an embodiment of the present invention, wherein a fringe field formed between a pixel electrode and a common electrode penetrates a slit to form a pixel region and a common electrode. An example of an array substrate of a fringe field switching (FFS) mode liquid crystal display device that implements an image by driving liquid crystal molecules positioned on the image is shown. However, the present invention is not limited thereto, and the present invention can be applied regardless of display modes such as TN mode or VA (Vertical Alignment) mode as well as horizontal electric field modes such as IPS mode or S-IPS mode.

In an actual liquid crystal display device, MxN pixels exist by crossing N gate lines and M data lines.

Referring to FIG. 2 , the liquid crystal display device according to the embodiment of the present invention includes a liquid crystal panel 110 and a liquid crystal panel 110 in which liquid crystal is injected between a color filter substrate 105 and an array substrate 115 to output an image. ) installed on the rear surface of the liquid crystal panel 110 to emit light over the entire surface of the backlight unit 140 and the liquid crystal panel 110 and the backlight unit 140 are fastened to each other and fixed to each other by a guide panel 145 and a lower cover 150 may be included.

At this time, the flexible printed circuit (FPC) 125 is electrically connected to the array substrate 115 through a chip-on-film (COF) and is located on the rear surface of the lower cover 150 at the same time. It may be electrically connected to a printed circuit board (PCB) 155 .

Polarizing plates 101 and 111 are provided outside the color filter substrate 105 and the array substrate 115 , respectively.

A pad portion is provided in an edge region of the array substrate 115 that does not overlap the color filter substrate 105 , and a predetermined resin layer 120 for insulation while blocking external influences such as moisture is formed on the front surface of the pad portion. .

That is, one short side and/or one long side of the array substrate 115 are formed to protrude relative to the color filter substrate 105 , and a pad portion on which the driver IC is mounted is provided in the protruding region of the array substrate 115 .

In addition, the backlight unit 140 may include a light source (not shown) emitting light. In addition, the light guide plate 142 that advances the light incident through the side surface facing the light source toward the upper liquid crystal panel 110, the reflective sheet 141 disposed on the rear surface of the light guide plate 142, and disposed on the upper surface of the light guide plate 142 A plurality of optical sheets 143 for irradiating the liquid crystal panel 110 by improving the efficiency of light emitted from the light guide plate 142 may be included.

The present invention is not limited to the structure of the backlight unit 140 described above, and any structure of the backlight unit 140 may be applied to the liquid crystal display according to the embodiment of the present invention.

As a light source, for example, Cold Cathode Fluorescence Lamp (CCFL), Hot Cathode Fluorescence Lamp (HCFL), External Electrode Fluorescence Lamp (EEFL), Light Emitting Diode ; LED), but is not limited thereto.

In this case, a light source made of an LED array and an LED printed circuit board for driving the light source may constitute the LED assembly 130 .

Such a light source may be connected to an inverter to receive power and emit light.

The light emitted from the light source is incident on the side of the light guide plate 142 made of a transparent material, and the reflective sheet 141 disposed on the rear surface of the light guide plate 142 transmits the light transmitted through the rear surface of the light guide plate 142 to the upper surface of the light guide plate 142 . By reflecting toward the optical sheets 143, the loss of light is reduced and the uniformity is improved.

In this case, the optical sheets 143 include a diffuser sheet and upper and lower prism sheets, and a protective sheet may be added thereto.

A liquid crystal panel 110 including a color filter substrate 105 and an array substrate 115 is seated on the upper portion of the backlight unit 140 configured as described above through the guide panel 145 , and the lower cover 150 is coupled to the lower portion. This constitutes a liquid crystal display device. At this time, a plurality of double-sided tapes 154 may be used for combining them.

And, referring to FIG. 3, the array substrate 115 of the liquid crystal display according to the embodiment of the present invention has a gate line 116 and a data line 117 which are arranged vertically and horizontally to define a pixel area, A thin film transistor, which is a switching device, is formed in a region where the gate line 116 and the data line 117 intersect.

The thin film transistor includes a gate electrode 112 connected to the gate line 116 , a source electrode 113a connected to the data line 117 , and a drain electrode 113b connected to the pixel electrode 118 .

In addition, the thin film transistor includes a gate insulating film (not shown) for insulation between the gate electrode 112 and the source/drain electrodes 113a and 113b and the source electrode 113a and the source electrode 113a by the gate voltage supplied to the gate electrode 112 . An active layer (not shown) for forming a conductive channel between the drain electrodes 113b is included. At this time, the drawing shows a thin film transistor having a straight channel shape because the source electrode 113a has a straight shape, but the present invention is not limited thereto, and the present invention relates to the channel shape of the thin film transistor. can be applied without

A box-shaped common electrode 108 and a pixel electrode 118 are formed in the pixel region. At this time, the pixel electrode 118 together with the common electrode 108 generates a fringe field in multiple numbers within the pixel electrode 118 . slits 118s.

At this time, the pixel electrode 118 is electrically connected to the drain electrode 113b through a contact hole 114 formed in the passivation layer (not shown), and the common electrode 108 is disposed parallel to the gate line 116 . It may be connected to the common line 108l.

At this time, the image can be displayed by controlling the arrangement of liquid crystal molecules according to the voltage difference between the common voltage supplied to the common electrode 108 and the data signal supplied to the pixel electrode 118 connected to the thin film transistor to adjust the light transmittance. there is. The common voltage may be generated by the DC/DC converter, and the common voltage generated by the DC/DC converter is supplied to the common electrode 108 positioned in the pixel region through the common voltage line.

Referring to FIGS. 2 and 3 , the array substrate 115 configured as described above is bonded to the color filter substrate 105 while maintaining the cell gap through column spacers to configure the liquid crystal panel 110 .

At this time, although not shown, the color filter substrate 105 is a color filter composed of a plurality of sub-color filters realizing red, green, and blue colors and a sub-color filter that separates the color filter and blocks the light passing through the liquid crystal layer. The black matrix may include a color filter and an overcoat layer formed on the black matrix.

A driver may be connected to the array substrate 115 of the liquid crystal panel 110 .

The driver mounts a driving chip 121 including a data driver and a gate driver for driving the data line 117 and the gate line 116 of the liquid crystal panel 110, respectively, so that the array substrate 115 and one side are connected to each other. It may include a plurality of FPCs 125 and an external PCB 155 connected to the other side of the plurality of FPCs 125 .

The FPC 125 on which the driving chip 121 is mounted may be positioned in a Chip On Film (COF) or Tape Carrier Package (TCP) method. However, at least one of the data driver and the gate driver included in the driving chip 121 may be directly mounted on the array substrate 115 using a COG method, or may be formed and embedded in the array substrate 115 in a thin film transistor forming process.

Referring back to FIG. 2 , the rear ITO 127 may be positioned above the liquid crystal panel 110 , that is, on the color filter substrate 105 .

The rear ITO 127 is for discharging static electricity that may be generated on the surface of the liquid crystal panel 110 , that is, the color filter substrate 105 , and may be made of a transparent conductive material such as ITO (Indium Tin Oxide).

Since the rear ITO 127 is transparent, the light emitted from the liquid crystal panel 110 may be transmitted upward.

In this case, the upper polarizing plate 101 may be positioned on the rear ITO 127 .

The polarizing plates 101 and 111 are general polarizing devices that transmit natural light having a vibrating plane in all directions of 360 degrees and transmit only light having a vibrating plane in a certain direction and absorb the remaining light to obtain polarized light.

It is common to use an element that divides the polarization component into a polarization component perpendicular to the incident plane and a polarization component parallel to the incident plane using a polarizer having light absorption characteristics, and linearly polarized light and elliptically polarized light are obtained by the polarizer.

For this purpose, it is possible to have uniform polarization and high polarization efficiency by selecting an appropriate material and processing it in the form of a film according to the purpose.

For example, a polyvinyl alcohol (PVA) film treated with iodine may be used as a polarizing substrate, and a triacetate cellulose (TAC) film may be used as a protective layer to protect the PVA film. .

A tempered glass plate (not shown) may be further positioned on the upper polarizing plate 101 .

The tempered glass plate is to prevent the liquid crystal panel 110 from being easily damaged by external impact, and it compresses and deforms the glass surface by heating the general plate glass to 500 to 600° C. close to the softening temperature and quenching it with compressed cooling air. It is a glass that is strengthened by tensile deformation of the inside. It has 3 to 5 times the flexural strength, 3 to 8 times stronger impact resistance, and excellent heat resistance compared to ordinary glass.

In the liquid crystal display according to the embodiment of the present invention configured as described above, a cover shield tape ( 160), characterized in that it is provided. Accordingly, electrostatic discharge (ESD) is reduced and screen abnormalities due to static electricity can be prevented.

4A to 4C are plan views illustrating, for example, a shape of a cover shield tape according to an embodiment of the present invention.

5 is a perspective view schematically showing a liquid crystal display to which a cover shield tape is attached according to an embodiment of the present invention. As an example, the liquid crystal display to which the cover shield tape is attached as shown in FIG. 4B is schematically shown.

6A is a view for explaining a short circuit defect caused by the cover shield tape, and FIG. 6B is a view for explaining that a short circuit defect is prevented by applying the cover shield tape according to an embodiment of the present invention.

Referring to FIG. 5 , as described above, the liquid crystal display device according to the embodiment of the present invention is installed on the liquid crystal panel 110 and the rear surface of the liquid crystal panel 110 to emit light over the entire surface of the liquid crystal panel 110 . and a backlight unit 140 .

The liquid crystal panel 110 has a color filter substrate 105 and an array substrate 115 bonded to each other to face each other to maintain a uniform cell gap, and a liquid crystal layer formed in a cell gap between the color filter substrate 105 and the array substrate 115 ( not shown).

In this case, a lower polarizing plate (not shown) is attached to the array substrate 115 , and the backlight unit 140 is installed thereunder.

Although not shown in detail, the backlight unit 140 may include a light source emitting light. In addition, a light guide plate that advances light incident through the side facing the light source toward the upper liquid crystal panel 110, a reflective sheet disposed on the rear surface of the light guide plate, and a liquid crystal panel by improving the efficiency of light emitted from the light guide plate disposed on the upper surface of the light guide plate It may include a plurality of optical sheets irradiated to (110).

In addition, a rear ITO 127 made of a transparent conductive material such as ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide) is formed on the rear surface of the color filter substrate 105 , and an upper polarizing plate (not shown) is formed thereon. is attached.

In addition, when the color filter substrate 105 and the array substrate 115 are attached to each other, the pad portion 115 ′ of the array substrate 115 exposed to the outside is configured to drive a pad and a thin film transistor for auto probe inspection. For the pad (not shown) is formed and connected to the TCP (not shown). The TCP is connected to a pad of a PCB (not shown) on which an external driving circuit or element is formed (or mounted), and electrically connects the liquid crystal panel 110 and the PCB. A driving device such as a gate driving device or a data driving device is mounted in the TCP to apply a signal to the thin film transistor, the pixel electrode, and the common electrode inside the liquid crystal panel 110 .

In this case, as described above, in the case of the horizontal electric field mode, the cover shield tape 160 is applied to ground the color filter substrate 105 .

The cover shield tape 160 is bent from the upper surface of the color filter substrate 105 to cover the lower surface of the lower cover 150 and the lower surface of the PCB 155 so as to sufficiently cover the side surface of the liquid crystal panel 110 and is bent to cover the liquid crystal panel 110 . It is attached to the panel 110 and the lower cover (not shown).

As an example, the cover shield tape 160 may have a "T" shape, and in this case, it may be composed of a straight upper end 160a and a body 160b extending vertically from the upper end 160a in the downward direction. there is. However, the present invention is not limited thereto, and may have a rectangular shape without distinction of an upper end and a body.

At this time, the upper portion of the upper portion 160a is adhered to the color filter substrate 105 , while the remaining upper and lower portions cover the side surface of the liquid crystal panel 110 , and the body 160b forms the side surface of the backlight unit 140 . Through the process, the lower cover and the lower surface of the PCB (not shown) are covered and attached.

At this time, as an example, referring to FIGS. 4A , 5 and 6A , when the entire surface of the cover shield tape 60 is made of a conductive material, the resin layer 120 is the pad of the array substrate 115 . When the pad part 115' is not sufficiently covered and the pad part 115' is exposed, a short circuit defect may occur due to the conductive cover shield tape 60 .

In this case, as the level of the common voltage is lowered due to the short circuit of the common voltage and the ground signal, a screen abnormality occurs.

That is, as described above, in the case of the horizontal electric field mode, the cover shield tape 60 is applied to ground the color filter substrate 105 , and the resin layer 120 is formed on the pad portion 115 ′ of the array substrate 115 . ) is not sufficiently covered and the pad part 115' is exposed, a short circuit may occur between the conductive cover shield tape 60 and the pads 122 of the pad part 115'. will cause

On the other hand, referring to FIGS. 4B, 5 and 6B, the cover shield tape 160 is made of two materials, a conductive material 161 and a non-conductive material 162, and adheres to the rest except for the ground surface that requires conductivity. When the non-conductive material 162 is applied to the surface, the above-described short circuit failure of the pad part is prevented.

That is, the upper part of the upper part 160a that requires conductivity, that is, the upper part adhered to the upper surface of the rear ITO 127, the side and lower cover 150 of the backlight unit 140, and the body 160b adhered to the lower surface of the PCB. ), a conductive material 161 may be applied to the ground surface.

In addition, the non-conductive material 162 may be applied to the adhesive surface that is adhered to the side surface of the liquid crystal panel 110 including the pad portion of the array substrate 115 among the upper end 160a.

However, the present invention is not limited thereto, and the conductive material 161 and the non-conductive material 162 may be applied to a selective area for a portion requiring conductivity and a portion not required.

In this case, when the resin layer 120 does not sufficiently cover the pad part 115' of the array substrate 115 and the pad part 115' is exposed, the cover shield tape 160 is applied to the pad part (115') of the pad part 115'. 122), a short circuit is prevented by applying the non-conductive material 162 to the contact surface of the cover shield tape 160 . At this time, since the adhesion is made without a protective film, it can have the same adhesive force without lowering the adhesive force.

In addition, in the case of the present invention, as the non-conductive material 162 is applied to the contact surface of the cover shield tape 160 in contact with the pad part 115', the resin layer 120 is formed on the array substrate 115 as described above. It is applicable not only when the pad part 115' of the pad part 115' is not sufficiently covered, but also when the resin layer is not formed.

The cover shield tape 160 according to the embodiment of the present invention having two materials of the conductive material 161 and the non-conductive material 162 has the entire surface made of the conductive material 161 tape, and the adhesive surface portion It can be manufactured by attaching a tape of the non-conductive material 162 only to the . However, the present invention is not limited thereto.

Meanwhile, referring to FIG. 4C , the cover shield tape 260 according to the embodiment of the present invention may have a rectangular shape without distinction of an upper end and a body in addition to the aforementioned “T” shape.

At this time, the conductive material ( 261) can be applied.

In addition, the non-conductive material 262 may be applied to the adhesive surface of the upper portion that is adhered to the side surface of the liquid crystal panel 110 including the pad portion of the array substrate 115 .

Although many matters are specifically described in the above description, these should be construed as examples of preferred embodiments rather than limiting the scope of the invention. Therefore, the invention should not be defined by the described embodiments, but should be defined by the claims and equivalents to the claims.

101,111: polarizing plate 105: color filter substrate
115: array substrate 140: backlight unit
160,260: cover shield tape 160a: top
160b: body 161,261: conductive material
162,262: non-conductive material

Claims (8)

a liquid crystal panel comprising a color filter substrate and an array substrate having one side protruding from the color filter substrate to form a pad portion;
a backlight unit positioned on the rear surface of the liquid crystal panel to supply light to the liquid crystal panel;
a lower cover for fixing the liquid crystal panel and the backlight unit to each other; and
and a cover shield tape attached so as to cover the lower surface of the lower cover from the upper surface of the color filter substrate through the pad part to ground the color filter substrate;
In the cover shield tape, a non-conductive material is applied to a side surface of the liquid crystal panel including the pad part, and a conductive material is applied to an upper surface of the color filter substrate, which is an adhesive surface, and a lower surface of the lower cover,
and a pad is formed on the pad part, and the non-conductive material portion of the cover shield tape is in contact with the pad. The liquid crystal display device of claim 1 , further comprising a rear indium tin oxide (ITO) positioned on the color filter substrate, wherein the cover shield tape is attached to an upper surface of the rear ITO. The liquid crystal display device of claim 1, wherein the cover shield tape is bent from an upper surface of the color filter substrate to cover a lower surface of the lower cover and is attached to the liquid crystal panel and the lower cover. The liquid crystal display device of claim 2 , wherein the cover shield tape has a “T” shape including a straight upper end and a body extending vertically from the upper end in a downward direction. 5 . The lower surface of the lower cover of claim 4 , wherein a portion of the upper portion of the upper end is adhered to the color filter substrate, and the remaining upper and lower portions cover a side surface of the liquid crystal panel, and the body passes through a side surface of the backlight unit. A liquid crystal display device, characterized in that it is attached to cover. The method of claim 5, wherein the conductive material is applied to the upper part of the upper end of the cover shield tape adhered to the upper surface of the rear ITO, the side surface of the backlight unit, and the ground surface of the body adhered to the lower surface of the lower cover. A liquid crystal display device, characterized in that. The liquid crystal display device of claim 5 , wherein the non-conductive material is applied to an adhesive surface of the upper end of the cover shield tape that is adhered to a side surface of the liquid crystal panel including a pad portion of the array substrate. delete

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