KR102237161B1 - Liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of preventing the liquid crystal panel from being pressed.
A feature of the present invention is that the first and second protrusions are provided on the horizontal part of the guide panel to support a part of the rear surface of the liquid crystal panel, and the first and second protrusions are provided with the foam pad on the horizontal part of the guide panel. It is to be supported through.
Through this, it is possible to prevent the liquid crystal panel from being pressed in the process of bringing the printed circuit board to the rear surface of the cover but to be in close contact with it.
In addition, the second protrusion restricts the amount of shrinkage due to the elastic force of the foam pad, thereby further preventing the liquid crystal panel from being pressed. Accordingly, light leakage from the liquid crystal panel or the backlight unit It can prevent damage from occurring.

Description

Liquid crystal display device

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of preventing the liquid crystal panel from being pressed.

The liquid crystal display device (LCD), which is advantageous for displaying moving images and has a high contrast ratio, is actively used in TVs and monitors. The optical anisotropy and polarization of liquid crystals The principle of image implementation is shown.

Such a liquid crystal display device has a liquid crystal panel bonded by interposing a liquid crystal layer between two parallel substrates as an essential component, and the difference in transmittance is realized by changing the arrangement direction of liquid crystal molecules by an electric field in the liquid crystal panel. do.

However, since the liquid crystal panel does not have its own light-emitting element, a separate light source is required to display the difference in transmittance as an image, and for this purpose, a backlight having a light source is disposed on the back of the liquid crystal panel.

Here, as a light source of the backlight, a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp, and a light emitting diode (LED, hereinafter referred to as LED) are used.

Among them, LEDs, in particular, have features such as small size, low power consumption, and high reliability, and are thus widely used as a display light source.

1 is a cross-sectional view of a liquid crystal display device using a general LED as a light source.

As shown, a general liquid crystal display device includes a liquid crystal panel 10, a backlight unit 20, a guide panel 30, a cover bottom 50, and a top cover 40.

The liquid crystal panel 10 is a part that plays a key role in image expression and is composed of first and second substrates 12 and 14 bonded to each other with a liquid crystal layer therebetween.

A backlight unit 20 is provided behind the liquid crystal panel 10.

The backlight unit 20 includes an LED assembly 29 arranged along the longitudinal direction of at least one edge of the guide panel 30, a white or silver reflector 25 mounted on the cover buttum 50, and such a reflector ( 25) and an optical sheet 21 interposed thereon and a light guide plate 23 mounted thereon.

At this time, the LED assembly 29 is configured on one side of the light guide plate 23, and a plurality of LEDs 29a emitting white light and an LED printed circuit board (PCB) on which the LEDs 29a are mounted: 29b, hereinafter referred to as PCB ).

The liquid crystal panel 10 and the backlight unit 20 include the top cover 40 surrounding the upper edge of the liquid crystal panel 10 and the backlight unit 20 while the edges are surrounded by a rectangular guide panel 30. The cover bottoms 50 covering the rear surface are coupled at the front and rear sides, respectively, and are modularized through the guide panel 30.

In addition, reference numerals 19a and 19b denote polarizing plates that are attached to the front and rear surfaces of the liquid crystal panel 10 and control the polarization direction of light, respectively.

On the other hand, along one edge of the liquid crystal panel 10, the printed circuit board 17 is connected via a connection member 16 to be folded and adhered to the rear surface of the cover buttoum 50 during the modularization process, and the liquid crystal panel 10 Silver is attached and fixed on the guide panel 30 through a foam pad 60 such as double-sided tape.

At this time, in the process of tilting the printed circuit board 17 to the rear surface of the cover butt 50 and making it close, a force is applied to the printed circuit board 17 or the connecting member 16, and the printed circuit board 17 or the connecting member The liquid crystal panel 10 is pressed by the force applied to (16).

Through this, light leakage of the liquid crystal panel 10 is caused, or the load of the liquid crystal panel 10 is transmitted to the backlight unit 20 by the pressure of the liquid crystal panel 10 to cause the optical sheet 21 to move or the light guide plate. (23) It causes damage to the backlight unit 20 such as damage.

In particular, as the liquid crystal panel 10 is attached and fixed on the guide panel 30 by the foam pad 60, the pressure of the liquid crystal panel 10 is further deepened by contraction due to the elastic force of the foam pad 60. As a result, the flatness of the liquid crystal panel 10 is affected through this, so that light leakage from the liquid crystal panel 10 is further deepened.

In addition, the optical sheet 21 is moved by a slide groove (not shown) formed in the guide panel 30, but due to the difference in luminance, a spot phenomenon occurs in the image. As a result, it causes a problem of deterioration of the display quality of the liquid crystal display.

An object of the present invention is to solve the above-described problems, and to prevent the liquid crystal panel from being pressed by a printed circuit board and a connecting member that are in close contact with the rear surface of the cover bottom.

Through this, the second object is to prevent the occurrence of light leakage of the liquid crystal panel, and the third object is to prevent damage to the backlight unit.

In addition, the fourth object is to prevent the occurrence of movement of the optical sheet due to the slide groove formed on the lower surface of the horizontal part of the guide panel, thereby preventing the display quality of the liquid crystal display from deteriorating. It is for 5 purposes.

In order to achieve the object as described above, the present invention provides a liquid crystal panel to which a printed circuit board is connected through a connecting member along one edge, a backlight unit positioned under the liquid crystal panel, a cover bottom on which the backlight unit is mounted, and the A first protrusion seated on the cover butt and including a vertical part and a horizontal part protruding vertically from the inside of the vertical part, and a first protrusion protruding on the horizontal part corresponding to the one edge, and spaced apart from the first protrusion And a guide panel including a second protrusion positioned, wherein the first protrusion supports a portion of an edge of a rear end of the liquid crystal panel, and the second protrusion supports a portion of an inner side from an edge of a rear end of the liquid crystal panel. It provides a liquid crystal display device.

In this case, the first protrusion is located corresponding to a region where the connection member of the liquid crystal panel is located, the second protrusion is located corresponding to a region where the connection member is not located, and the first protrusion is located at an end edge of the horizontal part. 2 A foam pad is positioned adjacent to the protrusion, and the foam pad supports a portion of the rear surface of the liquid crystal panel.

Further, a fastening hole is provided on the side of the cover butt, a fastening protrusion inserted into the fastening hole is provided inside the vertical part of the guide panel, and a stepped jaw is provided on the lower surface of the horizontal part corresponding to the position of the fastening protrusion. It is provided with a slide groove comprising a.

In addition, the height of the stepped jaw has the same height as the lower surface of the horizontal portion corresponding to a region where the fastening protrusion is not located.

As described above, according to the present invention, first and second protrusions for supporting a portion of the rear surface of the liquid crystal panel are provided on the horizontal part of the guide panel, and the liquid crystal panel is placed on the horizontal part of the guide panel together with a foam pad. And, by being supported through the second protrusion, there is an effect of preventing the liquid crystal panel from being pressed in the process of bending the printed circuit board to the rear surface of the cover butt and making it in close contact with each other.

In addition, since the second protrusion limits the amount of contraction due to the elastic force of the foam pad, there is an effect of further preventing the liquid crystal panel from being pressed through this.

Accordingly, there is an effect of preventing light leakage from the liquid crystal panel or damage to the backlight unit by pressing the liquid crystal panel.

In addition, since the second protrusion serves as a guide for attaching the foam pad, it is possible to simplify the attaching process of the foam pad on the horizontal portion of the guide panel, thereby improving the efficiency of the process.

In addition, by forming a slide groove including a stepped step on the lower surface of the horizontal part of the guide panel corresponding to the area where the fastening protrusion of the vertical part of the guide panel protrudes, it is possible to prevent the optical sheet from being inserted into the slide groove. There is.

Through this, there is an effect of preventing the occurrence of a problem in that the display quality of the liquid crystal display device is deteriorated due to luminance unevenness caused by the motion of the optical sheet.

1 is a cross-sectional view of a liquid crystal display device using a general LED as a light source.
2 is a schematic perspective view of a liquid crystal display according to an embodiment of the present invention.
Figure 3a is a cross-sectional view taken along AA of Figure 2 modularized.
3B is a cross-sectional view taken along BB of FIG. 2 in a modularized manner.
4A is a schematic cross-sectional view of a guide panel according to an embodiment of the present invention.
Figure 4b is a rear perspective view schematically showing the lower surface of the horizontal portion of the guide panel.

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

2 is a schematic perspective view of a liquid crystal display according to an exemplary embodiment of the present invention.

As shown, the liquid crystal display device according to the embodiment of the present invention is largely composed of a liquid crystal panel 110, a backlight unit 120, a guide panel 130, and a cover bottom 150.

At this time, if the direction on the drawing is defined for convenience of explanation, the backlight unit 120 is disposed behind the liquid crystal panel 110 on the premise that the display surface of the liquid crystal panel 110 faces forward, and The cover buttoum 150 is positioned on the rear surface of the backlight unit 120 while the square-shaped guide panel 130 is wrapped around it.

Let's take a closer look at each of these.

First, the liquid crystal panel 110 is a part that plays a key role in image expression of a liquid crystal display, and the first and second substrates 112 and 114 are bonded to each other, and a liquid crystal layer interposed therebetween. Includes (not shown).

Although not shown in the drawing, a plurality of gate lines and data lines cross each other to define a pixel on the inner surface of the first substrate 112 called a lower substrate or an array substrate, and a thin film transistor at each intersection point. : TFT) is provided so that the transparent pixel electrode and the common electrode formed in each pixel are connected.

And the inner surface of the second substrate 114 called the upper substrate or the color filter substrate, as an example corresponding to each pixel, is a color filter of red (R), green (G), and blue (B) colors, and these A black matrix covering each of the gate lines, data lines, and thin film transistors is provided.

And between the first and second substrates 112 and 114 and the liquid crystal layer (not shown), upper and lower alignment layers (not shown) that determine the initial molecular arrangement direction of the liquid crystal are interposed, and the first and second substrates ( A seal pattern (not shown) is formed along the edges of both substrates 112 and 114 to prevent leakage of the liquid crystal layer (not shown) filled between the substrates 112 and 114.

Further, polarizing plates 119a and 119b (refer to FIG. 3A) that selectively transmit only specific light are attached to the outer surfaces of the first and second substrates 112 and 114, respectively.

Along one edge of the liquid crystal panel 110, the printed circuit board 117 is connected through a connection member 116 such as a flexible circuit board or a tape carrier package (TCP), A plurality of 116 are connected to each other at a predetermined interval along the longitudinal direction of one edge of the printed circuit board 117 and the liquid crystal panel 110.

The printed circuit board 117 is folded to the rear surface of the cover buttum 150 in a modular process using the bending characteristics of the connecting member 116 and adhered to the printed circuit board 117.

Accordingly, when the selected thin film transistor for each gate line is turned on by the on/off signal of the thin film transistor scanned and transmitted to the gate line, the liquid crystal panel 110 transmits the image signal of the data line to the corresponding pixel electrode. Is transmitted, and the arrangement direction of the liquid crystal molecules is changed by the electric field between the pixel electrode and the common electrode generated thereby, indicating a difference in transmittance.

In addition, the liquid crystal display according to the present invention includes a backlight unit 120 that supplies light from the rear surface of the liquid crystal panel 110 so that a difference in transmittance of the liquid crystal panel 110 is expressed to the outside.

The backlight unit 120 includes an LED assembly 129 arranged along at least one edge in the longitudinal direction of the cover bottom 150, a reflector 125, a light guide plate 123 mounted on the reflector 125, and It includes an optical sheet 121 positioned above the light guide plate 123.

The LED assembly 129 is a light source of the backlight unit 120 and is located on one side of the light guide plate 123 so as to face the light incident surface of the light guide plate 123, and such an LED assembly 129 includes a plurality of LEDs 129a, A plurality of LEDs (129a) includes a PCB (129b) is mounted to be spaced apart at a predetermined interval.

At this time, the plurality of LEDs 129a emit light having colors of red (R), green (G), and blue (B) respectively toward the light incident surface of the light guide plate 123, and such a plurality of RGB LEDs 129a ) Can be turned on at once to realize white light by color mixing.

In particular, in recent years, in order to improve luminous efficiency and luminance, a blue LED 129a including a blue LED chip having excellent luminous efficiency and luminance is used, and as a phosphor,'cerium doped yttrium aluminum garnet (YAG:Ce)', That is, a blue LED 129a made of a yellow phosphor is used.

The blue light emitted from the LED 129a passes through the phosphor and is mixed with the yellow light emitted by the phosphor, thereby implementing white light.

The light guide plate 123 into which the light emitted from the plurality of LEDs 129a is incident is spread evenly over a wide area of the light guide plate 123 while the light incident from the LEDs 129a travels inside the light guide plate 123 by a number of total reflections. A surface light source is provided to the liquid crystal panel 110.

The light guide plate 123 may include a pattern of a specific shape on the lower surface to supply a uniform surface light source. Here, the pattern may be configured in various ways such as an elliptical pattern, a polygon pattern, and a hologram pattern in order to guide the light incident into the light guide plate 123. The pattern is formed on the lower surface of the light guide plate 123 by a printing method or an injection method.

The reflector 125 is located on the rear surface of the light guide plate 123 and reflects the light that has passed through the rear surface of the light guide plate 123 toward the liquid crystal panel 110 to improve the luminance of the light.

The optical sheet 121 on the upper portion of the light guide plate 123 includes a diffusion sheet and at least one light collecting sheet, and diffuses or condenses the light that has passed through the light guide plate 123 to provide a more uniform surface light source to the liquid crystal panel 110. Let's join the company.

The liquid crystal panel 110 and the backlight unit 120 are modularized through the guide panel 130 and the cover bottom 150, and the cover bottom 150 includes the liquid crystal panel 110 and the backlight unit 120 on which the backlight unit 120 is mounted. By providing a horizontal plane 151 to support the entire liquid crystal display and at the same time, it plays the role of a lower frame that minimizes the occurrence of light loss, and the edge of the horizontal plane 151 is vertically bent to the side ( 153).

Then, the guide panel 130 is seated on the cover buttum 150.

The guide panel 130 has a rectangular frame shape for supporting the rear edge of the liquid crystal panel 110, and the position of the liquid crystal panel 110 and the backlight unit 120 inside the vertical portion 131 and the vertical portion 131 A horizontal portion 133 for separating the is provided.

Here, in the liquid crystal display according to the embodiment of the present invention, the printed circuit board 117 corresponds to one edge of the liquid crystal panel 110 connected through the connection member 116 on the horizontal portion 133 of the guide panel 130. In the liquid crystal panel 110, first and second protrusions 137a and 137b for supporting a portion of the rear surface of the liquid crystal panel 110 are further provided, and the first and second protrusions 137a and 137b are It is formed along the longitudinal direction of the horizontal portion 133.

In particular, the first protrusion 137a is formed to protrude from the horizontal portion 133 adjacent to the vertical portion 131 corresponding to the region where the connecting member 116 connected to one edge of the liquid crystal panel 110 is located, The second protrusion 137b extends from the first protrusion 137a and is formed to protrude from the horizontal portion 133 adjacent to the end of the horizontal portion 133 corresponding to a region where the connecting member 116 is not located.

The liquid crystal panel 110 is attached and supported on the horizontal portion 133 through a foam pad 160 such as double-sided tape together with the first and second protrusions 137a and 137b.

At this time, the guide panel 130 may be referred to as a support main or a main support, and a mold frame, and the cover buttom 150 may be referred to as a bottom cover or a lower cover.

Here, the liquid crystal display device of the present invention omits the top cover (40 in FIG. 1), which was located in front of the liquid crystal panel 110, so that the liquid crystal display device can be thin and light, and the process is simplified. In addition, it is possible to reduce the process cost.

In addition to being lightweight and thin, the display area is expanded through the omission of the top cover (40 in FIG. 1), and the bezel area, which is a non-display area other than the display area, is reduced. A display device can be provided.

As described above, in the liquid crystal display according to the exemplary embodiment of the present invention, the first and second protrusions 137a and 137b supporting part of the rear surface of the liquid crystal panel 110 on the horizontal part 133 of the guide panel 130 ), and the liquid crystal panel 110 is supported through the first and second protrusions 137a and 137b together with the foam pad 160 on the horizontal portion 133 of the guide panel 130, 110) can be prevented from being pressed.

Through this, it is possible to prevent light leakage from the liquid crystal panel 110 or damage to the backlight unit 120 due to the pressure of the liquid crystal panel 110.

FIG. 3A is a cross-sectional view taken along line A-A of FIG. 2 which is modularized, and FIG. 3B is a cross-sectional view taken along line B-B of FIG. 2 which is modularized.

As shown, an LED assembly comprising a reflector 125, a light guide plate 123, an LED (129a in FIG. 2) and a PCB (129b in FIG. 2) on which an LED (129a in FIG. 2) is mounted (FIG. 2) Optical sheets 121 are stacked on 129 and the light guide plate 123 to form a backlight unit (120 in FIG. 2 ).

In addition, a liquid crystal panel 110 with a liquid crystal layer (not shown) interposed therebetween is located on the first and second substrates 112 and 114 on the backlight unit (120 in FIG. 2), and the first and second substrates 112 and 114 Polarizing plates 119a and 119b that selectively transmit only specific light are attached to the outer surfaces of the substrates 112 and 114.

The backlight unit (120 in FIG. 2) and the liquid crystal panel 110 are surrounded by a guide panel 130 at the edges, and the cover bottom 150 is coupled to the rear surface thereof.

At this time, the inner side of the vertical portion 131 of the guide panel 130 is in close contact with the outside of the side surface 153 of the cover butt 150, and is formed protruding from the inner side of the vertical portion 131 of the guide panel 130. As the protrusion 135 is inserted into the fastening hole 155 provided in the side surface 153 of the cover bottom 150, the guide panel 130 and the cover bottom 150 are assembled and fastened to each other.

In addition, the guide panel 130 seated on the cover bottom 150 is from the top edge of the liquid crystal panel 110 to the outer side of the vertical portion 131 of the guide panel 130 and the rear edge of the cover bottom 150. It is modularized more stably with the cover buttoum 150 through the covering adhesive shading tape 170.

Here, the liquid crystal panel 110 includes a foam pad 160 such as a double-sided tape and first and second protrusions 137a and 137b on the horizontal portion 133 protruding inward of the vertical portion 131 of the guide panel 130. ), it is seated, attached, and supported.

The foam pad 160 is located at the end of the horizontal portion 133 to support a portion of the rear surface of the liquid crystal panel 110, and the liquid crystal panel 110 is attached to the horizontal portion 133 of the guide panel 130. .

In addition, as shown in FIG. 3A, the first protrusion 137a includes a printed circuit board 117 in which a connection member 116 connected to one edge of the liquid crystal panel 110 is in close contact with the rear surface of the cover bottom 150. The first protrusions 137a are spaced apart from the foam pad 160 at a predetermined interval to support a portion of the rear surface of the end edge of the liquid crystal panel 110.

And, as shown in Figure 3b, the second protrusion 137b is located corresponding to the region where the connecting member 116 is not located, the second protrusion 137b is located adjacent to the foam pad 160 A portion of the rear surface of the liquid crystal panel 110 supported by the pad 160 and the rear surface of the end edge of the liquid crystal panel 110 supported by the first protrusion 137a are supported.

Here, by positioning the first protrusion 137a corresponding to the region where the connection member 116 is provided, and supporting a portion of the rear surface of the end edge of the liquid crystal panel 110 through the first protrusion 137a, the printed circuit board In the process of bringing the 117 to the rear surface of the cover buttom 150 and in close contact, the force applied to the connection member 116 and the printed circuit board 117 is distributed to the guide panel 130.

Accordingly, the force applied to the liquid crystal panel 110 is reduced, so that it is possible to prevent the liquid crystal panel 110 from being pressed.

Through this, it is possible to prevent light leakage from the liquid crystal panel 110 or damage to the backlight unit (120 in FIG. 2) due to a load caused by pressing the liquid crystal panel 110.

In addition, the second protrusion 137b supporting a portion of the rear surface of the liquid crystal panel 110 also disperses a part of the force applied to the connection member 116 and the printed circuit board 117, thereby depressing the liquid crystal panel 110. This can be further prevented from occurring.

In addition, as the second protrusion 137b is located adjacent to the foam pad 160, even if the liquid crystal panel 110 is pressed by the force applied to the connection member 116 and the printed circuit board 117, the foam By limiting the amount of contraction due to the elastic force of the pad 160, it is prevented that the liquid crystal panel 110 is pressed by the contraction due to the elastic force of the foam pad 160.

In this way, by preventing the liquid crystal panel 110 from being pressed, it is possible to prevent the occurrence of a problem of light leakage due to the pressing of the liquid crystal panel 110.

In addition, it is possible to prevent the back light unit (120 in FIG. 2) from being pressed by the load caused by the pressing of the liquid crystal panel 110, so that the optical sheet 121 is pressed or the light guide plate 123 is damaged. Can be prevented.

And, by placing the second protrusion 137b adjacent to the foam pad 160, in the process of attaching the foam pad 160 on the horizontal part 133, the second protrusion 137b becomes the foam pad 160 It plays a role of guiding the attachment position of the device. Therefore, the efficiency of the foam pad 160 attaching process is improved.

That is, the process of attaching the foam pad 160 on the horizontal part 133 is performed by the operator's manual labor, and the second protrusion 137b is protruded on the horizontal part 133 and the second protrusion 137b By attaching the foam pad 160 adjacent to, the operator easily proceeds the attaching process of the foam pad 160.

Therefore, it is to improve the efficiency of the foam pad 160 attaching process.

As described above, in the liquid crystal display according to the exemplary embodiment of the present invention, the first and second protrusions 137a and 137b supporting part of the rear surface of the liquid crystal panel 110 on the horizontal part 133 of the guide panel 130 ), and the liquid crystal panel 110 is supported through the first and second protrusions 137a and 137b together with the foam pad 160 on the horizontal portion 133 of the guide panel 130, 110) can be prevented from being pressed.

That is, the printed circuit board 117 is connected to one edge of the liquid crystal panel 110 through the connecting member 116, and the printed circuit board 117 is folded to the rear surface of the cover buttom 150 and is printed in close contact. Force is applied to the circuit board 117 and the connection member 116.

At this time, a force is also applied to one edge of the liquid crystal panel 110 by the applied force, so that the liquid crystal panel 110 may be pressed. The liquid crystal panel 110 on the horizontal portion 133 of the guide panel 130 By forming the first and second protrusions 137a and 137b supporting the rear surface of the liquid crystal panel 110, the force applied to the liquid crystal panel 110 is distributed to the guide panel 130, so that the liquid crystal panel 110 is pressed. It can be prevented.

In particular, by forming the first protrusion 137a to support a portion of the rear surface of the end edge of the liquid crystal panel 110 in correspondence with the region where the connecting member 116 is located, the printed circuit board 117 is The first protrusion 137a may support the area to which the liquid crystal panel 110 receives the most force in the process of being in close contact with the liquid crystal panel 110 in close contact with the rear surface.

In addition, the force applied to the liquid crystal panel 110 can be distributed to the guide panel 130 by the second protrusion 137b, thereby preventing the liquid crystal panel 110 from being pressed.

Through this, it is possible to prevent light leakage from the liquid crystal panel 110 or damage to the backlight unit (120 in FIG. 2) due to the pressure of the liquid crystal panel 110.

In addition, since the second protrusion 137b limits the amount of contraction due to the elastic force of the foam pad 160, it is possible to further prevent the liquid crystal panel 110 from being pressed, and the second protrusion 137b is By serving as an attachment guide of the 160), it is possible to simplify the attachment process of the foam pad 160 on the horizontal portion 133 of the guide panel 130, thereby improving the efficiency of the process.

On the other hand, the liquid crystal display device in which the liquid crystal panel 110 and the backlight unit (120 in FIG. 2) are modularized by the guide panel 130 and the cover bottom 150 is a cover window (not shown) in front of the liquid crystal panel 110. ) Or a touch panel (not shown), etc., and a cover window (not shown) or a touch panel (not shown) is a modular liquid crystal display by an adhesive (not shown) applied to the front surface of the liquid crystal panel 110 Attached to the device.

At this time, in order to prevent the adhesive applied to the front surface of the liquid crystal panel 110 from flowing into the modular liquid crystal display device, the guide panel 130 and the cover bottom 150 are placed in the vertical portion 131 of the guide panel 130. It is preferable to assemble and fasten the fastening protrusions 135 protruding on the inner side of the cover buttum 150 in an inner hook type that is inserted into the fastening hole 155 provided on the side 153 of the cover bottom 150.

However, in the process of forming the fastening protrusion 135 on the inner surface of the vertical portion 131 of the guide panel 130, a burr is generated on the lower surface of the horizontal portion 133 of the guide panel 130. Then, damage such as tearing of the optical sheet 121 of the backlight unit (120 in FIG. 2) is caused by such a burr.

To prevent this, a slide groove 138 (see FIG. 4A) for removing a part of the lower surface is formed on the lower surface of the horizontal portion 133 corresponding to the region where the fastening protrusion 135 of the guide panel 130 is formed. Although the optical sheet 121 can be prevented from being torn by the slide groove 138 (see FIG. 4A), the optical sheet 121 is inserted into the slide groove 138 (refer to FIG. 4A). It will cause a feeling of emotion.

An uneven phenomenon appears in the image due to the difference in luminance due to the skew phenomenon of the optical sheet 121, thereby causing a problem of deterioration of the display quality of the liquid crystal display device.

Here, the liquid crystal display according to the exemplary embodiment of the present invention has a stepped step 138a (see FIG. 4A) in a slide groove 138 (see FIG. 4A) provided on a lower surface of the horizontal portion 133 of the guide panel 130. Thus, while preventing tearing of the optical sheet 121 due to a burr, the optical sheet 121 is inserted into the slide groove 138 (refer to FIG. 4A) to cause the optical sheet 121 to sway. It can also be prevented.

This will be described in more detail with reference to FIGS. 4A and 4B.

4A is a cross-sectional view schematically showing a cross-section of a guide panel according to an embodiment of the present invention, and FIG. 4B is a rear perspective view schematically showing a lower surface of a horizontal portion of the guide panel.

As shown, the guide panel 130 according to the embodiment of the present invention has a rectangular frame shape, and includes a vertical portion 131 and a horizontal portion 133 protruding vertically from the inside of the vertical portion 131, A fastening protrusion 135 is protruded on the inner side of the vertical part 131, and first and second protrusions 137a and 137b are protruded above the horizontal part 133.

A cover bottom (150 in FIG. 3B) on which the backlight unit (120 in FIG. 2) is seated is located inside the vertical portion 131, and the fastening protrusion 135 provided on the inner surface of the vertical portion 131 is The guide panel 130 and the cover bottom 150 are assembled and fastened to each other by being inserted into a fastening hole (155 in FIG. 3B) provided on the side of (150 in FIG. 3B).

In addition, a liquid crystal panel (110 in FIG. 3B) is seated and supported on the horizontal part 133, and the liquid crystal panel (110 in FIG. 3B) is a foam pad (FIG. 3B), which is an adhesive tape provided on the horizontal part 133. 160) and the first and second protrusions 137a and 137b, and are attached and supported on the horizontal portion 133.

At this time, the guide panel 130 according to the embodiment of the present invention corresponds to a region in which the fastening protrusion 135 is provided on the inner side of the vertical portion 131 and the horizontal portion 133 is formed on the lower surface of the horizontal portion 133. A slide groove 138 is provided to prevent burrs from being formed on the lower surface of the slide groove 138, and the lower end of the horizontal portion 133 is at the end of the lower surface of the horizontal portion 133 that is the end of the slide groove 138. A stepped step 138a from which the surface protrudes is provided.

It is possible to prevent a problem in which the optical sheet (121 in FIG. 3B) of the backlight unit (120 in FIG. 2) positioned below the horizontal portion 133 is inserted into the slide groove 138 by the stepped jaw 138a. .

Through this, the optical sheet (121 in FIG. 3B) can be prevented from occurring when the optical sheet (121 in FIG. 3B) is inserted into the slide groove 138, thereby preventing the occurrence of the optical sheet (121 in FIG. 3B). It is possible to prevent the occurrence of a problem in that the display quality of the liquid crystal display device is deteriorated due to luminance unevenness caused by the movement of)

Here, the height of the stepped jaw 138a is formed to have the same height as the lower surface of the horizontal portion 133 corresponding to the region where the fastening protrusion 135 is not formed, and is positioned as the lower surface of the horizontal portion 133 It is preferable that the pressing of (121 in FIG. 3B) does not occur.

As described above, in the liquid crystal display device according to the exemplary embodiment of the present invention, the first and second protrusions supporting part of the rear surface of the liquid crystal panel (110 in FIG. 3B) on the horizontal part 133 of the guide panel 130 137a, 137b), and the liquid crystal panel (110 in FIG. 3b) on the horizontal part 133 of the guide panel 130 together with a foam pad (160 in FIG. 3b) and the first and second protrusions 137a and 137b By being supported through, it is possible to prevent the liquid crystal panel (110 in FIG. 3B) from being pressed.

In addition, the second protrusion 137b limits the amount of contraction due to the elastic force of the foam pad (160 in FIG. 3B), thereby further preventing the liquid crystal panel (110 in FIG. 3B) from being pressed, and thus, the liquid crystal panel It is possible to prevent the occurrence of light leakage (110 in FIG. 3B) or damage to the backlight unit (120 in FIG. 2) due to pressing of the liquid crystal panel (110 in FIG. 3B ).

In addition, by making the second protrusion 137b serve as an attachment guide for the foam pad (160 in FIG. 3B), the attaching process of the foam pad (160 in FIG. 3B) on the horizontal portion 133 of the guide panel 130 is performed. Simplification can improve the efficiency of the process.

In addition, a slide including a stepped step 138a on the lower surface of the horizontal portion 133 of the guide panel 130 corresponding to the region in which the fastening protrusion 135 of the vertical portion 131 of the guide panel 130 protrudes. By forming the groove 138, it is possible to prevent the optical sheet (121 in FIG. 3B) from being inserted into the slide groove 138.

Through this, it is possible to prevent the occurrence of a problem in that the display quality of the liquid crystal display device is deteriorated due to non-uniform luminance caused by the motion of the optical sheet (121 in FIG. 3B).

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention.

110: liquid crystal panel (112, 114: first and second substrates)
116: connecting member, 117: printed circuit board
120: backlight unit (121: optical sheet, 123: light guide plate, 125: reflector, 129: LED assembly (129a: LED, 129b: PCB))
130: guide panel (131: vertical portion, 133: horizontal portion, 137a, 137b: first and second protrusions)
150: cover buttom (151: horizontal plane, 153: side)
160: foam pad

Claims (7)

A liquid crystal panel to which a printed circuit board is connected through a connecting member along one edge;
A backlight unit positioned under the liquid crystal panel;
A cover bottom on which the backlight unit is mounted;
A first protrusion seated on the cover butt, including a vertical part and a horizontal part protruding vertically from the inside of the vertical part, and protruding on the horizontal part corresponding to the one edge, and spaced apart from the first protrusion A guide panel including a second protrusion that is positioned
Including, wherein the first protrusion supports a part of an edge of a rear end of the liquid crystal panel, and the second protrusion supports a part of an inner side from an edge of a rear end of the liquid crystal panel,
A plurality of the connecting members are provided to be spaced apart from each other with a gap along one edge of the liquid crystal panel,
The first protrusion is positioned to correspond to an area in which the connecting member is positioned, and the second protrusion is positioned to correspond to the gap.
delete The method of claim 1,
A foam pad is positioned adjacent to the second protrusion at an end edge of the horizontal portion, and the foam pad supports a portion of a rear surface of the liquid crystal panel.
The method of claim 1,
A liquid crystal display device having a fastening hole on a side surface of the cover butt, and a fastening protrusion inserted into the fastening hole inside a vertical portion of the guide panel.
The method of claim 4,
A liquid crystal display device having a slide groove including a stepped portion on a lower surface of the horizontal portion corresponding to the position of the fastening protrusion.
The method of claim 5,
The liquid crystal display device having the same height as the lower surface of the horizontal portion corresponding to a region where the fastening protrusion is not located. The method of claim 1,
The first and second protrusions are alternately positioned with each other along the longitudinal direction of the horizontal portion,
The first protrusion is positioned adjacent to the vertical portion, and the second protrusion is positioned adjacent to an end of the horizontal portion.

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