KR102090932B1 - liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display device, and in particular, to a liquid crystal display device that can prevent the problem of the quality of the liquid crystal display device is lowered while preventing the flow of the light guide plate.
A feature of the present invention is that the position of the light guide plate is fixed in the modular liquid crystal display device by positioning the pad at one corner of the light guide plate's carrying light surface, thereby preventing the flow.
In addition, the pad is formed of a translucent material, and the guide portion of the reflector surrounds the outer side surface of the pad, thereby preventing the occurrence of image darkness in which the area where the pad is located appears darker than other areas.
Accordingly, the optical characteristics of the liquid crystal display device are changed, thereby preventing the problem of deterioration in image quality.

Description

Liquid crystal display device

The present invention relates to a liquid crystal display device, and in particular, to a liquid crystal display device that can prevent the problem of the quality of the liquid crystal display device is lowered while preventing the flow of the light guide plate.

The liquid crystal display device (LCD), which is actively used in TVs, monitors, etc. because it is advantageous for moving picture display and has a large contrast ratio, is an optical anisotropy and polarization of liquid crystal. It shows the principle of image implementation.

This liquid crystal display device is a liquid crystal panel (liquid crystal panel) bonded by interposing a liquid crystal layer between two substrates (substrate) as an essential component, the electric field in the liquid crystal panel to change the arrangement direction of the liquid crystal molecules to realize the difference in transmittance do.

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

1 is a cross-sectional view of a typical liquid crystal display device.

As illustrated, a typical liquid crystal display device is composed of a liquid crystal panel 10 and 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 display, and is composed of first and second substrates 12 and 14 adhered to each other with a liquid crystal layer interposed therebetween.

The 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 one edge of the guide panel 30, a white or silver reflector 25 seated on the cover bottom 50, and such a reflector 25 ) Includes a light guide plate 23 that is mounted on the top and a plurality of optical sheets 21 interposed therebetween.

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

The liquid crystal panel 10 and the backlight unit 20 have a top cover 40 that surrounds the top edge of the liquid crystal panel 10 and a back surface of the backlight unit 20 in a state where the edges are surrounded by a rectangular frame-shaped guide panel 30. Cover cover (50) covering each is coupled in front and rear respectively, and is integrated through the guide panel (30).

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

On the other hand, it is important to secure the LED assembly 29, the light guide plate 23 and the optical sheets 21 of the backlight unit 20 so that the liquid crystal display device configured as described above does not flow.

Particularly, when the light guide plate 23 flows due to external shock or vibration, damage to a plurality of LEDs 29a of the LED assembly 29 occurs, or optical characteristics of the liquid crystal display device are changed, thereby deteriorating image quality. Can cause.

This causes a problem that the quality of the liquid crystal display device, such as deterioration in brightness and image quality, is deteriorated.

The present invention is to solve the above problems, the first object is to prevent the flow of the light guide plate.

In addition, a second object is to improve the luminance and image quality of the liquid crystal display device.

In order to achieve the object as described above, the present invention is a light guide plate having a guide groove formed at one edge of the carrying light plane; A pad made of a translucent material inserted into the guide groove; A reflector positioned at a lower portion of the light guide plate and including a guide portion surrounding the outer side surface of the pad; An LED assembly attached along the light incident surface of the light guide plate; An optical sheet seated on the light guide plate; It provides a liquid crystal display device including a liquid crystal panel seated on top of the optical sheet.

At this time, the size of the pad is 1.1 to 1.2 times larger than the size of the guide groove, and the pad is formed in a bar shape so that the lower surface facing the reflector has a narrower width than the upper surface facing the liquid crystal panel. .

In addition, the guide portion is formed by vertically bending in response to the width and height of the pad from one end of the reflector, and a stopper for maintaining a gap between the LED assembly and the light incident surface is provided on the light incident surface of the light guide plate. .

And, located on the lower portion of the light guide plate, and includes a horizontal surface and a cover bottom made of an edge portion perpendicular to the horizontal surface, and a side surface perpendicular to the incoming light surface and the incoming light surface and connecting the incoming light surface and the incident light surface is the edge Form a gap with wealth.

As described above, according to the present invention, by positioning the pad at one edge of the light guide plate, the position of the light guide plate is fixed in the modular liquid crystal display device to prevent flow.

In addition, the pad is formed of a translucent material, and the guide portion of the reflector surrounds the outer side of the pad, thereby preventing the occurrence of image darkness in which the area where the pad is located appears darker than other areas.

Accordingly, the optical characteristics of the liquid crystal display device are changed, thereby preventing the problem of deterioration in image quality.

1 is a cross-sectional view of a typical liquid crystal display device.
2 is a perspective view schematically showing a liquid crystal display device according to an exemplary embodiment of the present invention.
3 is a perspective view schematically showing a state in which a pad is inserted into the guide groove of the light guide plate of FIG. 2.
Figure 4a is a photograph showing the appearance of the darkness of the image is observed in the area where the pad is located.
Figure 4b is a photograph showing a state in which the darkness of the image is not observed in the area where the pad of the liquid crystal display according to an embodiment of the present invention is located.
FIG. 5 is a schematic cross-sectional view of the modularized FIG. 2;

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

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

As illustrated, the liquid crystal display device according to an embodiment of the present invention is largely composed of a liquid crystal panel 110 and a backlight unit 120, a guide panel 130, a top cover 140, 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 outlines thereof are disposed. With a rectangular frame-shaped guide panel 130, the top cover 140 is positioned in front of the liquid crystal panel 110, and the cover bottom 150 is positioned on the rear surface of the backlight unit 120, from the front and rear. Combined and unified.

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 the image expression of the liquid crystal display, and the first substrate 112 and the second substrate 114 bonded to each other and the liquid crystal layer interposed therebetween. (Not shown).

Although not shown in the drawing, a plurality of gate lines and data lines are intersected and pixels are defined on the inner surface of the first substrate 112, commonly referred to as a lower substrate or an array substrate, and a thin film transistor is thin at each intersection point. film transistor (TFT) is provided and is connected one-to-one with the transparent pixel electrode formed in each pixel.

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

In addition, a red (R), green (G), and blue (B) color filter and a transparent common electrode covering the black matrix are provided.

At this time, although not clearly shown in the drawings, the upper and lower alignment layers (not shown) interposing the initial molecular alignment direction of the liquid crystal are interposed at the boundary between the two substrates 112 and 114 and the liquid crystal layer (not shown). , A seal pattern (not shown) is formed along the edges of both the substrates 112 and 114 to prevent leakage of the liquid crystal layer (not shown) filled between the first and second substrates 112 and 114. .

In addition, polarizing plates 119a, 119b (see FIG. 5) selectively transmitting only specific light are attached to the outer surfaces of the first and second substrates 112 and 114, respectively.

A printed circuit board 117 is connected via a connecting member 116 such as a flexible circuit board or a tape carrier package (TCP) along one edge of the liquid crystal panel 110 to guide the module in the modularization process. The side surface of the panel 130 or the cover bottom 150 is properly flipped to the back surface to be in close contact.

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 transferred to the gate line, the liquid crystal panel 110 displays an image signal of the data line to the corresponding pixel electrode. Is transferred, and the alignment direction of the liquid crystal molecules is changed by an electric field between the pixel electrode and the common electrode, thereby representing a difference in transmittance.

In addition, the liquid crystal display device according to the present invention is provided with a backlight unit 120 for supplying light from its rear surface so that a difference in transmittance represented by the liquid crystal panel 110 is externally expressed.

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 reflective plate 125, a light guide plate 123 mounted on the reflective plate 125, and And an optical sheet 121 positioned above the light guide plate.

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 the LED assembly 129 includes a plurality of LEDs 129a, It includes a plurality of LED (129a) PCB (129b) is mounted spaced apart at regular intervals.

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

In particular, in order to improve luminous efficiency and brightness, in particular, blue LED 129a including a blue LED chip having excellent luminous efficiency and brightness 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 realizing white light.

The light guide plate 123 through which the light emitted from the plurality of LEDs 129a is incident is evenly distributed over a wide area of the light guide plate 123 while the light incident from the LED 129a progresses in the light guide plate 123 by multiple total reflections. Spreads to provide a surface light source for the liquid crystal panel 110.

The light guide plate 123 connects the LED assembly 129a with the incident light surface 123a and the opposite side of the light incident surface 123b and the light incident surface 123a with the light incident surface 123b, and the upper part where light is emitted It consists of a surface 123c and a lower surface 123d facing the reflector 125 and both side surfaces 123e and 123f facing each other.

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 variously configured such as an elliptical pattern, a polygonal pattern, a hologram pattern, etc. 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 220 by a printing method or an injection method.

Here, in the liquid crystal display according to the embodiment of the present invention, the light guide plate 123 along the longitudinal direction of the light guide face 123a is provided on the light guide face 123a of the light guide plate 123 corresponding to one edge where the LED assembly 129 is located. ) Is provided with a stopper 123g for maintaining the optical separation distance between the light incident surface 123a and the LED assembly 129.

That is, the backlight unit 120 has a width called an optical gap or an air gap, that is, an interval between the LED assembly 129 and the light incident surface 123a of the light guide plate 123 is the backlight unit 120 ) Serves as one of the optical designs for supplying the high-quality surface light source, which is the most important role, to the liquid crystal panel 110.

Therefore, by providing a stopper 123g on the light receiving surface 123a of the light guide plate 123, the distance between the light receiving surface 123a of the light guide plate 123 and the LED assembly 129 is kept constant, thereby providing a high quality surface. The light source may be provided to the liquid crystal panel 110.

In addition, a guide groove 123h is formed at one edge of the light guide surface 123b, which is the opposite side of the light incident surface 123a provided with the stopper 123g, and the guide groove 123h prevents the flow of the light guide plate 123. A pad 160 made of a translucent material for positioning is located.

Through this, the light guide plate 123 according to an embodiment of the present invention is fixed in the modular LCD device through the pad 160 inserted into the guide groove 123h, and the light guide plate 123 is covered. The light guide plate 123 is prevented from flowing in a horizontal or vertical direction due to external shock or shaking in a state accommodated in the 150.

Through this, it is possible to prevent the plurality of LEDs 129a from being damaged by the flow of the light guide plate 123.

Here, the pad 160 is formed to have a larger size than the guide groove (123h).

At this time, the pad 160 is formed so that the lower surface 163 facing the reflector 125 has a narrower width than the upper surface 161. To this end, the pad 160 has a lower surface 163 and a side 165 It is formed to have an inclined surface 167 inclined at an angle therebetween.

In the process of inserting the pad 160 formed to have a larger size than the guide groove 123h into the guide groove 123h of the light guide plate 123, the pad 160 is more easily guided by the guide groove of the light guide plate 123 This is to be inserted in (123h).

The reflector 125 is positioned on the rear surface of the light guide plate 123 to reflect the light passing through the rear surface of the light guide plate 123 toward the liquid crystal panel 110, thereby improving the luminance of the light.

At this time, the guide portion 125a surrounding the outer side of the pad 160 is further provided at the edge of the reflective plate 125 corresponding to one edge where the guide groove 123h of the light guide plate 123 is formed.

Through this, the light guide plate 123 according to an embodiment of the present invention is fixed in its position in the modular liquid crystal display device to prevent flow, and at the same time, the image that appears darker than other areas near the edge where the pad 160 is located Darkness can be prevented from being observed.

Therefore, it is possible to prevent a problem in that the optical characteristics of the liquid crystal display device are different and the image quality is deteriorated. We will look at this in more detail later.

The optical sheet 121 above the light guide plate 123 includes a diffusion sheet and at least one light collecting sheet, and diffuses or collects light passing through the light guide plate 123 to provide a more uniform surface light source to the liquid crystal panel 110. Try to join.

The liquid crystal panel 110 and the backlight unit 120 are modularized through the top cover 140, the guide panel 130, and the cover bottom 150. The top cover 140 includes the top edge of the liquid crystal panel 110 and Configured to cover the sides.

Here, the top cover 140 is a rectangular frame shape in which the cross section is bent in an “a” shape to cover the top and side edges of the liquid crystal panel 110, and the front surface of the top cover 140 is opened to open the liquid crystal panel 110. It is configured to display an image implemented in.

The guide panel 130 supports the edges of the liquid crystal panel 110 and has a rectangular frame shape to surround the edges of the backlight unit 120, and the vertical portion 131 and the vertical portion 131 surrounding the side surface of the backlight unit 120 ), A horizontal portion 133 is provided to separate the positions of the liquid crystal panel 110 and the backlight unit 120.

The liquid crystal panel 110 is attached and fixed on the horizontal portion 133 through an adhesive pad 170 (see FIG. 5) such as a double-sided tape.

And, such a guide panel 130 is seated on the cover bottom 150, the cover bottom 150 is made of a horizontal surface 151 and the edge portion 153 of the edge of the horizontal surface 151 is vertically bent.

The guide panel 130, the cover bottom 150, and the top cover 140 have the edges of the liquid crystal panel 110 and the backlight unit 20 wrapped around the edges of the liquid crystal panel 110 with the guide panel 130 in the state. The covering top cover 140 and the cover bottom 150 covering the back surface of the backlight unit 120 are combined in front and rear, respectively, and are integrally modularized through the guide panel 130.

At this time, the top cover 140 is sometimes called a case top or a top case, the guide panel 130 is also called a support main or main support, a mold frame, and the cover bottom 150 is also called a bottom cover or a bottom cover. Sometimes it loses.

At this time, the liquid crystal display device having the above-described structure may remove the top cover 140 and the cover bottom 150 in order to realize a lightweight and thin liquid crystal display device that has been recently required. Through the removal of the top cover 140 and cover bottom 150, light weight and thinness of the liquid crystal display device are possible, and it has an effect of simplifying the process.

In addition, due to the removal of the top cover 140 and the cover bottom 150 made of a metal material, it is possible to reduce the process cost.

The liquid crystal display device according to the above-described embodiment of the present invention forms a guide groove 123h at one corner of the light guide plate 123, the light guide plate 123, and prevents the flow of the light guide plate 123 in the guide groove 123h. By positioning the pad 160 for the purpose, it is possible to prevent the flow of the light guide plate 123.

Through this, it is possible to prevent the plurality of LEDs 129a from being damaged by the flow of the light guide plate 123.

In particular, the guide portion 125a for forming the pad 160 of a translucent material and surrounding the side surface of the pad 160 at the edge of the reflector 125 corresponding to one edge where the guide groove 123h of the light guide plate 123 is formed By further forming, it is possible to prevent the darkness of the image, which is darker than other areas, from being observed near the edge where the pad 160 is located.

Therefore, it is possible to prevent a problem in that the optical characteristics of the liquid crystal display device are different and the image quality is deteriorated.

3 is a perspective view schematically showing a state in which a pad is inserted into a guide groove of the light guide plate of FIG. 2.

As shown, the reflector (125 in FIG. 2) and the light guide plate 123 are sequentially seated on the horizontal plane (151 in FIG. 2) of the cover bottom (150 in FIG. 2), at this time, one edge of the light guide plate 123 A guide groove 123h is formed in the guide groove 123h, and a pad 160 made of a translucent material is inserted into the guide groove 123h.

The pad 160 is made of a translucent material, is formed to have a bar shape having a certain thickness, and the guide groove 123h is formed to have the same shape as the pad 160.

At this time, as the pad 160 is formed larger in size than the guide groove 123h, the edge of the light guide plate 123 is located at the pad 160 due to the overlap between the pad 160 and the guide groove 123h. It is fixed while pushing diagonally from.

Therefore, the position of the light guide plate 123 of the present invention is fixed in the modular liquid crystal display device.

In particular, as the light guide plate 123 is pushed in the diagonal direction of the pad 160 by the pad 160, the light guide surface 123b perpendicular to each other forming a corner where the guide groove 123h of the light guide plate 123 is formed is formed. Side (123f) is to form a certain gap (gap: A) with the edge portion 153 of the cover bottom (150 in FIG. 2), the light guide plate 123 carrying light surface (123b) and side (123f) and cover bottom The gap A formed between the edge portions 153 of (150 in FIG. 2) serves to prevent flow due to expansion of the light guide plate 123 due to high temperature heat generated when the liquid crystal display device is driven.

Here, the pad 160 is preferably formed about 1.1 to 1.2 times larger than the guide groove (123h).

When the size of the pad 160 is formed to be 1.2 times larger than the guide groove 123h, it may be difficult to insert the pad 160 into the guide groove 123h, and the size of the pad 160 is guided. When the groove 123h has the same size, the light guide plate 123 cannot be pushed diagonally from one edge where the pad 160 is positioned by the pad 160, so that the flow of the light guide plate 123 cannot be completely blocked.

In particular, the liquid crystal display device of the present invention further forms a guide portion 125a surrounding the outside of the side surface of the pad 160 on the reflective plate (125 in FIG. 2), wherein the guide portion 125a is formed of a reflective plate (125 in FIG. 2). Made in a vertically bent state from one end, the outer side of the pad 160 is wrapped.

The guide portion 125a is formed to have a width and height corresponding to the length and height of the pad 160, and is bent vertically from the reflector (125 in FIG. 2), so that the outer surface of the guide portion 125a is covered (Fig. 2) 150, the inside of the edge portion 153 is in close contact with the inner surface of the guide portion 125a is in close contact with the outer side of the pad 160 to be wrapped.

Therefore, in the liquid crystal display device of the present invention, the pad 160 is made of a semi-transparent material, and is formed so that the guide portion 125a of the reflector (125 in FIG. 2) is in close contact with the outside of the side surface of the pad 160. In the vicinity of the corner where) is located, it is possible to prevent the darkening of the image, which is darker than other areas.

That is, in recent years, a liquid crystal display device having a lightweight, thin, and narrow bezel is required, and a guide panel for modularizing the liquid crystal panel (110 in FIG. 2) and the backlight unit (120 in FIG. 2) (130 in FIG. 2), The width of the cover bottom (150 in FIG. 2), the top cover (140 in FIG. 2), and the like are also reduced. As such, the guide panel (130 in FIG. 2), the cover bottom (150 in FIG. 2), and the top cover (FIG. 2) When the width of 140) is reduced, if the guide portion 125a of the reflector (125 in FIG. 2) is not formed without using the translucent material of the pad 160, the pad 160 may be rotated at an angle from the front side relative to the front side. ) Is exposed to the pubic part, and darkness is observed in the image.

This, a part of the light incident into the light guide plate 123 may be emitted to the pad 160 through the guide groove 123h of the light guide plate 123, as the pad which is not made of a translucent material absorbs light. In the area where the pad is located, a darker image is observed compared to other areas.

Accordingly, the liquid crystal display device of the present invention is formed of a translucent material so as to have an elastic force while partially reflecting light of the pad 160, and the guide portion 125a of the reflector (125 in FIG. 2) is outside the side surface of the pad 160. By enclosing, the light emitted through the guide groove 123h is partially reflected and partially transmitted by the pad 160, and the light transmitted through the pad 160 is reflected by the guide unit 125a. By increasing the light transmission efficiency, it is possible to prevent the occurrence of image darkness in which the area where the pad 160 is located is darker than other areas.

Therefore, it is possible to prevent a problem in that the optical characteristics of the liquid crystal display device are different and the image quality is deteriorated.

FIG. 4A is a photograph showing a state in which the darkness of an image is observed in an area where the pad is located. As the pad absorbs light, an image darkness that is darker than other areas is observed in the area where the pad is located.

On the contrary, according to an embodiment of the present invention, the pad 160 is formed of a semi-transparent material, and the guide portion 125a of the reflector (125 in FIG. 2) surrounds the outside of the side surface of the pad 160. As illustrated, it can be confirmed that the darkness of the image is not observed in the area where the pad 160 is located.

This forms the pad 160 with a semi-transparent material, and allows the guide portion 125a of the reflector (125 in FIG. 2) to surround the outside of the side surface of the pad 160, so that the light transmission efficiency of the region where the pad 160 is located As the height increases, the area where the pad 160 is located can be prevented from generating darker images than the other areas.

5 is a cross-sectional view schematically showing the modularized FIG. 2.

As shown, an LED assembly (Fig. 2) consisting of a PCB (129b in Fig. 2) on which a reflector 125, a light guide plate 123, and an LED (129a in Fig. 2) and an LED (129a in Fig. 2) are mounted. 129) and the optical sheet 121 are stacked on the light guide plate 123 to form a backlight unit (120 in FIG. 2).

In addition, a liquid crystal panel 110 in which a liquid crystal layer (not shown) is interposed is disposed between the first and second substrates 112 and 114 and the first and second substrates (120 in FIG. 2). Polarizing plates 119a and 119b selectively transmitting only specific light are attached to the outer surfaces of the substrates 112 and 114, respectively.

Here, the liquid crystal panel 110 whose edges are surrounded by the backlight unit (120 of FIG. 2) and the guide panel 130 is mounted on the horizontal surface 151 of the cover bottom 150, so that the edge of the cover bottom 150 The outer surface of the portion 153 is positioned in close contact with the inner surface of the vertical portion 131 of the guide panel 130.

At this time, the liquid crystal panel 110 is attached and supported through the adhesive pad 170 on the horizontal portion 133 of the guide panel 130.

In addition, the top cover 140 is assembled with the guide panel 130 so as to cover the edge of the upper surface of the liquid crystal panel 110 and to have a side surface surrounding the outer surface of the vertical portion 131 of the guide panel 130.

At this time, the guide groove 123h formed at one edge of the light guide plate 123 on the light guide surface 123b is positioned with a pad 160 made of a semi-transparent material, and the outer side of the pad 160 is guided by the reflector 125 The portion 125a is wrapped.

Therefore, the light generated from the LED assembly (129 of FIG. 2) is incident into the light guide plate 123, and while traveling through the light guide plate 123 by multiple total reflections, it is spread evenly within the light guide plate 123, some light Is emitted toward the pad 160 through the guide groove (123h), at this time, as the pad 160 is made of a translucent material, some light is reflected to re-enter the light guide plate 123, and some light is pad It will penetrate through (160).

The light transmitted through the pad 160 is reflected by the guide portion 125a of the reflective plate 125 to be re-entered into the light guide plate 123.

Through this, by improving the light transmission efficiency in one corner area of the light guide plate 123 where the pad 160 is located, it is possible to prevent the occurrence of an image dark where the area where the pad 160 is positioned is darker than the other areas. can do.

Therefore, it is possible to prevent a problem in that the optical characteristics of the liquid crystal display device are different and the image quality is deteriorated.

The present invention is not limited to the above-described embodiments, and can be implemented by variously changing within the limits without departing from the gist of the present invention.

123: Light guide plate (123b: Carrying light surface, 123f: Side, 123h: Guide groove)
125a: Guide section
153: edge
160: pad

Claims (7)

An LED assembly arranged along one edge;
A light guide plate including a light incident surface facing the LED assembly and a light entering surface opposite to the light entering surface, and having guide grooves at one edge of the light entering surface;
A pad inserted into the guide groove and made of a translucent material;
A reflector positioned under the light guide plate and including a guide portion surrounding the outer first side of the pad;
An optical sheet seated on the light guide plate;
A liquid crystal panel seated on the optical sheet; a cover bottom positioned at a lower portion of the light guide plate and comprising a horizontal surface and an edge portion perpendicular to the horizontal surface.
It includes,
In the pad, the first side surface is in contact with the guide portion, the second and third side surfaces of the pad are in contact with the carry-in surface, and the fourth side surface of the pad is in contact with the edge portion,
The optical sheet is a liquid crystal display device that covers the pad.
According to claim 1,
The pad has a size of 1.1 to 1.2 times larger than that of the guide groove.
According to claim 1,
The pad has a bar shape, and the lower surface facing the reflector is formed to have a narrower width than the upper surface facing the liquid crystal panel. According to claim 1,
The guide portion is formed by bending vertically corresponding to the width and height of the pad from one end of the reflector.
According to claim 1,
A liquid crystal display device comprising a stopper for maintaining a gap between the LED assembly and the light incident surface on the light incident surface of the light guide plate.
According to claim 1,
A liquid crystal display device forming a gap with the edge portion of a side surface perpendicular to the incoming light surface and the incoming light surface and connecting the incoming light surface to the incoming light surface.
According to claim 1,
The light incident on the light guide plate passes through a pad made of the translucent material, and the liquid crystal display device is reflected by the guide portion.

Images