KR102003845B1 - 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 having a narrow bezel.
A feature of the present invention is that a fastening emboss is formed on a horizontal surface of a cover bottom, an embossing hole corresponding to a fastening emboss is further formed on a lower surface of a vertical part of the guide panel, And the case top is formed to have a fastening end which is engaged with the third fastening protrusion and assembled and fastened.
Accordingly, the liquid crystal display of the present invention can simultaneously fix the X-axis direction, the Y-axis direction, and the Z-axis fastening direction defined in the drawing, thereby maintaining a modularized state more stably, .
Therefore, the liquid crystal display device of the present invention can realize a liquid crystal display device having a narrow bezel, and it is possible to prevent occurrence of defects due to screws. Further, even if shrinkage and expansion occur due to the material properties of the guide panel, it is also possible to prevent the guide panel from flowing.

Description

[0001] Liquid crystal display device [0002]

The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device having a narrow bezel.

A liquid crystal display device (LCD), which is advantageous for moving picture display and has a large contrast ratio and is actively used in TVs and monitors, exhibits optical anisotropy and polarization properties of a liquid crystal, And the like.

Such a liquid crystal display device has a liquid crystal panel in which a liquid crystal panel is interposed between two adjacent substrates through a liquid crystal layer as an essential component and changes the alignment direction of the liquid crystal molecules in an electric field in the liquid crystal panel to realize a difference in transmittance 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. To this end, a backlight unit having a light source is disposed on the back of the liquid crystal panel.

The liquid crystal panel and the backlight unit are integrally modularized through various mechanical elements. That is, the liquid crystal panel and the backlight unit have a case top which surrounds the top edge of the liquid crystal panel with the edges thereof being surrounded by a guide panel of a rectangular- The cover bottoms that cover the back surface of the cover are integrally joined to each other at the front and rear sides.

On the other hand, in recent years, such a liquid crystal display device has been widely used as a portable computer, a desktop computer monitor, and a wall-mounted television, and researches to have a massive weight and volume with a large display area It is actively proceeding.

Further, in addition to being lightweight and thin, the liquid crystal display device is also required to have a narrow bezel in which a display area is wide and a bezel area which is a non-display area other than the display area is formed as small as possible.

Accordingly, in order to realize a liquid crystal display device having a lightweight, thin, and narrow bezel design even in the process of modularizing the liquid crystal panel and the backlight unit through the case top, the guide panel, and the cover bottom, And is modularized through a hook type fastening method.

However, with the hook type fastening system alone, the fastening force is weak and the liquid crystal display device can not be stably modularized.

SUMMARY OF THE INVENTION It is a first object of the present invention to provide a liquid crystal display device having a lightweight, thin, narrow bezel and more stably modularized.

Another object of the present invention is to facilitate the modularization process of the liquid crystal display device.

According to an aspect of the present invention, there is provided a liquid crystal display comprising: a liquid crystal panel; A backlight unit positioned below the liquid crystal panel; A cover bottom having a horizontal surface on which the liquid crystal panel and the backlight unit are mounted and a side surface perpendicular to the horizontal surface, and a fastening emboss is formed near four corners of the horizontal surface; And an embossment hole which is seated on the cover bottom and is composed of a vertical portion covering an edge of the liquid crystal panel and the backlight unit and a horizontal portion on which the liquid crystal panel is seated and in which the fastening emboss is inserted into the lower surface of the vertical portion, A guide panel formed with first fastening protrusions formed at both side edges in the longitudinal direction of the one edge; And a case top which is made of a blade type corresponding to one edge of the guide panel and includes a fastening part which is engaged with and assembled with the first fastening protrusion.

At this time, a stepped portion is formed at both side edges of the longitudinal direction of the one side edge of the guide panel from the outer side surface of the vertical portion, and the first fastening protrusion is located at the edge of the guide panel and corresponds to one edge of the guide panel Wherein a cover bitum chamfer is formed on both sides of a longitudinal direction of the one side edge of the cover bottom, and the coupling portion is fitted to the step edge exposed to the outside through the cover bottom chamfer portion of the guide panel, do.

The casing includes a first edge covering a part of the upper surface of the liquid crystal panel, and a second edge covering the upper edge of the liquid crystal panel. And a second fastening protrusion is formed on an upper surface of the vertical portion of the guide panel so as to be inserted into the first fastening hole formed in the first edge, do.

A third fastening protrusion is formed at an outer side surface of the side surface of the cover bottom to be inserted into the second fastening hole formed at the second edge. The fastening emboss has a cylindrical or polygonal column shape, The height does not exceed the height of the side surface of the cover bottom, does not exceed the thickness of the guide panel, and the width of the fastening emboss does not exceed the width of the guide panel.

The height and width of the embossing hole correspond to the height and width of the embossing embossment, and the corners of the case top and the cover bottom are curved.

The backlight unit includes an LED assembly, a light guide plate, and an optical sheet.

As described above, according to the present invention, a fastening emboss is formed on the horizontal surface of the cover bottom, an embossing hole corresponding to the fastening emboss is formed on the lower surface of the vertical part of the guide panel, And the case top is formed to have a fastening end that is engaged with and engaged with the second fastening protrusion so that the liquid crystal display device of the present invention is capable of moving in the X-axis direction , The Y-axis direction and the Z-axis fastening direction can be fixed at the same time.

Therefore, the modularized state can be maintained more stably and the mechanical strength of the liquid crystal display device is increased.

Accordingly, it is possible to realize a liquid crystal display device having a narrow bezel, to prevent an increase in material cost due to the consumption of a fixing member such as a screw, and to improve the image quality of a liquid crystal panel And it is possible to minimize time, cost, and waste of manpower in modularizing the liquid crystal display device.

In addition, it is possible to prevent the flow of the guide panel even if shrinkage and expansion occur due to the material properties of the guide panel. Accordingly, the flow of the light guide plate due to the flow of the guide panel can be prevented, Accordingly, it is possible to prevent a problem that a plurality of LEDs of the LED assembly are damaged or optical characteristics of the liquid crystal display device are changed to deteriorate the image quality.

The edge of the guide panel and the edge of the case top exposed through the chamfered portion of the cover bottom are assembled and fastened to each other through the second fastening protrusion and the fastening end, There is an effect that the modularized state can be stably maintained and the mechanical strength of the liquid crystal display device is increased.

1 is an exploded perspective view of a liquid crystal display device according to an embodiment of the present invention;
FIGS. 2A to 2F are perspective views schematically showing a fastening process of a cover bottom, a guide panel and a case top according to an embodiment of the present invention.
3 is a cross-sectional view taken along line III-III in Fig.
4 is a cross-sectional view taken along the line IV-IV in Fig.
5A to 5B are cross-sectional views showing the fastening force of the case top and the guide panel in the Z-axis direction.
6 is a simulation result showing a case where stress applied to the case top is transferred to the guide panel by assembly and fastening of the case top and the guide panel.

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

1 is an exploded perspective view of a liquid crystal display device according to an embodiment of the present invention.

As shown in the drawing, the liquid crystal display according to the present invention includes a liquid crystal panel 110 and a backlight unit 120 which are stacked vertically, and a case top 140 and a guide panel 130, which are mechanical elements for integrating the liquid crystal panel 110 and the backlight unit 120, And a cover bottom 150 are provided.

For the sake of convenience, the backlight unit 120 is disposed behind the liquid crystal panel 110 under the assumption that the display surface of the liquid crystal panel 110 faces forward, The case top 140 in which the front edge of the liquid crystal panel 110 is covered with the guide tabs 130 of the rectangular tab shape and the cover bottoms 150 that are in close contact with the back surface of the backlight unit 120 are combined at the front and rear sides, do.

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

First, the liquid crystal panel 110 plays a key role in image display of a liquid crystal display device. The liquid crystal panel 110 includes a first substrate 112 and a second substrate 114 which are bonded to each other and a liquid crystal layer (Not shown).

Although not shown in the drawing, a plurality of gate lines and data lines intersect each other on the inner surface of a first substrate 112 called a lower substrate or an array substrate, pixels are defined, and thin- and a thin film transistor (TFT), which are connected in a one-to-one correspondence with the transparent pixel electrodes formed in the respective pixels.

On the inner surface of the second substrate 114 called an upper substrate or a color filter substrate, color filters of red (R), green (G), and blue (B) And a black matrix for covering the gate lines, the data lines, and the thin film transistors.

In addition, color filters of red (R), green (G), and blue (B) colors and transparent common electrodes covering the black matrix are provided.

A polarizing plate (not shown) for selectively transmitting only specific light is attached to the outer surfaces of the first and second substrates 112 and 114, respectively.

A printed circuit board 117 is connected to the liquid crystal panel 110 via a connection member 116 such as a flexible circuit board or a tape carrier package (TCP) along one edge of the liquid crystal panel 110, And is properly brought into close contact with the side surface of the panel 130 or the back surface of the cover bottom 150.

When the thin film transistor selected for each gate line is turned on by the on / off signal of the gate driving circuit, the liquid crystal panel 110 transmits the signal voltage of the data driving circuit to the corresponding pixel electrode through the data line. The alignment direction of the liquid crystal molecules in the liquid crystal layer is changed by the electric field between the pixel electrode and the common electrode to show a difference in transmittance.

And a backlight unit 120 for supplying light to the back surface of the liquid crystal panel 110 so that the difference in transmittance of the liquid crystal panel 110 is externally expressed.

The backlight unit 120 includes a white or silver reflective plate 125, a LED assembly 129 as a light source arranged along one longitudinal edge of the reflective plate 125, a light guide plate 123 mounted on the reflective plate 125, And an optical sheet 121 which is seated on the top of the optical sheet 121.

The LED assembly 129 is a light source of the backlight unit 120 and is disposed at one side of the light guide plate 123 to face the light incident surface of the light guide plate 123. The LED assembly 129 includes a plurality of LEDs 129a, And a PCB 129b on which a plurality of LEDs 129a are mounted with a predetermined spacing.

At this time, the plurality of LEDs 129a include an LED chip (not shown) that emits all the colors of RGB or emits white light, and emits white light forward toward the light incoming surface of the light guide plate 123. The plurality of LEDs 129a emit light having colors of red (R), green (G) and blue (B), respectively. By lighting the plurality of RGB LEDs 129a at once, white light It can also be implemented.

The light guiding plate 123 through which the light emitted from the plurality of LEDs 129a is incident is formed such that the light incident from the LED 129a travels in the light guiding plate 123 by total reflection several times, And provides a surface light source to the liquid crystal panel 110.

The light guide plate 123 is excellent in transparency, weatherability, and colorability, and induces light diffusion when light is transmitted.

The light guide plate 123 may include a pattern of a specific shape on the back surface to supply a uniform surface light source. The pattern may be formed in various shapes such as an elliptical pattern, a polygon pattern, a hologram pattern, and the like in order to guide 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 reflection plate 125 is disposed on the back surface of the light guide plate 123 and reflects light passing through the back surface of the light guide plate 123 toward the liquid crystal panel 110 to improve the brightness of light.

The optical sheet 121 on the light guide plate 123 includes a diffusion sheet and at least one light condensing sheet and diffuses or condenses the light passing through the light guide plate 123 to provide a more uniform surface light source to the liquid crystal panel 110 Let it enter.

At this time, the optical sheet 121 may include a reflective polarizing sheet that regenerates linearly polarized light to improve light efficiency.

The liquid crystal panel 110 and the backlight unit 120 are modularized through the case top 140, the guide panel 130 and the cover bottom 150. The cover bottom 150 is formed of a backlight unit including the liquid crystal panel 110, The horizontal plane 151 serves as a lower frame that supports the entire liquid crystal display device and minimizes the occurrence of light loss. The edge of the horizontal plane 151 is vertically bent, As shown in Fig.

A third fastening protrusion 155 is formed on the outer surface of the side surface 153 of the one side edge 153a of the cover bottom 150. A plurality of fastening protrusions 155 are formed near four corners of the horizontal surface 1515 of the cover bottom 150, And a fastening embossment 157 is formed to protrude therefrom.

Corner portions of the cover bottom 150 on both sides in the longitudinal direction of the one side edge 153a of the cover bottom 150 are formed with a cover bitum chamfer portion 159 are formed.

A rectangular guide panel 130 mounted on the cover bottom 150 and covering the edge of the backlight unit 120 is coupled with the cover bottom 150.

The guide panel 130 guides the liquid crystal panel 110 and the backlight unit 120 to the inside of the side surface 131 of the guide panel 130 and the side surface 131 of the guide panel 130, The liquid crystal panel 110 is attached and fixed on the horizontal portion 133 through a bonding pad (not shown) such as a double-sided tape.

Accordingly, the liquid crystal panel 110 and the backlight unit 120 are integrally modularized.

At this time, vertical portions 131 at both side edges in the longitudinal direction of the one edge 131a of the guide panel 130 corresponding to the one edge 153a of the cover bottom 150 are fixed to the vertical portions 131, And the vertical portion 131 of the guide panel 130 having the step 135 formed therein is thinner than the vertical portion 131 of the guide panel 130 of the other region .

At this time, a first fastening protrusion 137 protrudes from the step 135.

A second fastening protrusion 139 protrudes from the upper surface of the vertical portion 131 of the one edge 131a of the guide panel 130.

An embossing hole 138 (see FIG. 2B) into which a fastening emboss 157 formed on a horizontal surface 151 of the cover bottom 150 is inserted is formed on the lower surface of the vertical part 131 of the guide panel 130 Respectively.

Next, the case top 140 is positioned in front of the liquid crystal panel 110 modularized by the cover bottom 150 and the guide panel 130. The case top 140 is disposed on one edge of the liquid crystal panel 110 And protects the driving circuit and the like which are formed.

The case top 140 covers the top edge of one edge of the liquid crystal panel 110 and the outer side of the side surface 153 of the cover bottom 150 corresponding to one edge 153a of the cover bottom 150, Is made of a blade type bent in the " a " shape.

Since the case top 140 is formed only in correspondence with one edge of the liquid crystal panel 110, the liquid crystal display according to the embodiment of the present invention can be lightweight, thin and narrow bezel, .

That is, the case top 140 has a first edge 141 that covers the top edge of one edge of the liquid crystal panel 110 and a second edge 141 that is perpendicular to the outer edge of the side surface 153 of the cover bottom 150, And a second edge 143 covering the second edge 143.

The first fastening protrusion 139 formed on the upper surface of the vertical portion 131 of the guide panel 130 is inserted into the first edge 141 of the case top 140, And a second coupling hole 147 into which the third coupling protrusion 155 formed on the outer side of the side surface 153 of the one edge 153a of the cover bottom 150 is inserted is formed in the second edge 143. [ Respectively.

A chamfered portion 148 is formed at a corner of the second edge 143 in the longitudinal direction of the case top 140. The chamfered portion 148 of the case top 140, The first fastening protrusion 137 of the guide panel 130 is fastened to the end of the fastening part 149. The first fastening protrusion 137 of the guide panel 130 is fastened to the fastening part 149, As shown in Fig.

Accordingly, the case top 140, the guide panel 130, and the cover bottom 150 of the present invention are assembled and fastened to each other.

The guiding panel 130 is mounted on the cover cover 150 covering the edge of the backlight unit 120. The guiding panel 130 is mounted on the outer surface of the vertical portion 131 of the guide panel 130, Is brought into contact with the inner surface of the side surface 153 of the cover bottom 150.

At this time, the fastening embossment 157 formed on the horizontal surface 151 of the cover bottom 150 is inserted into the embossing hole 138 (see FIG. 2B) formed on the lower surface of the vertical portion 131 of the guide panel 130 do.

Accordingly, the guide panel 130 is temporarily fixed to the cover bottom 150, and the guide panel 130 is prevented from flowing.

The first fastening protrusion 137 formed at the step 135 and the step 135 of the guide panel 130 is exposed to the outside through the cover bottom chamfer 159 of the cover bottom 150.

The liquid crystal panel 110 is attached and fixed on the horizontal portion 133 of the guide panel 130 through a bonding pad (not shown) such as a double-sided tape.

The case top 140 is assembled and fastened from the front side of one edge of the liquid crystal panel 110. The first edge 141 of the case top 140 is provided with the upper part 131 of the vertical part 131 of the guide panel 130 And the second edge 143 of the case top 140 comes into contact with the outer surface of the side surface 153 of the cover bottom 150.

At this time, the second fastening protrusion 139 formed on the upper surface of the vertical part 131 of the guide panel 130 is inserted into the first fastening hole 145 formed in the first edge 141 of the case top 140 And the third fastening protrusion 155 formed on the side surface 153 of the cover bottom 150 is inserted into the second fastening hole 147 formed in the second edge 143.

The fastening part 149 of the case top 140 is fitted in the step 135 formed in the vertical part 131 of the guide panel 130. The fastening part 149a formed at the end of the fastening part 149, And the first fastening protrusion 137 formed on the step 135 of the guide panel 130 are assembled and fastened to each other.

Accordingly, the modularized liquid crystal display device of the present invention can stably modulate the liquid crystal panel 110 and the backlight unit 120.

In particular, the liquid crystal display device of the present invention can simultaneously fix the X axis direction, the Y axis direction, and the Z axis fastening direction defined in the drawing. Therefore, the modularized state can be maintained more stably and the mechanical strength of the liquid crystal display device is increased.

The liquid crystal display device of the present invention is configured such that the cover bottom 150 and the guide panel 130 and the case top 140 are assembled and fastened through a hook type fastening method, Further, by fastening the case top 140 more stably, a fixing member (not shown) such as a screw is not used, so that a liquid crystal display device having a narrow bezel can be realized.

As a result, it is possible to prevent an increase in the material cost due to the consumption of the fixing member (not shown) such as a screw, and the image quality of the liquid crystal panel 110 can be improved by the foreign substances generated when fastening members And it is possible to minimize time, cost, and waste of manpower in modularizing the liquid crystal display device.

The embossing 157 is provided on the cover bottom 150 and the embossing hole 138 (see FIG. 2B) is formed on the lower surface of the vertical portion 131 of the guide panel 130, It is possible to prevent the guide panel 130 from flowing even when shrinkage or expansion occurs.

The edge of the guide panel 130 exposed through the cover bottom chamfer portion 159 of the cover bottom 150 and the edge of the case top 140 are inserted through the first fastening protrusion 137 and fastening tab 149a By assembling and fastening the guide panel 130 and the case column 140, it is possible to maintain the modularized state more stably and to increase the mechanical strength of the liquid crystal display device.

FIGS. 2A to 2F are perspective views schematically illustrating a fastening process of a cover bottom, a guide panel, and a case top according to an embodiment of the present invention.

2A to 2F of the present invention, the backlight unit (120 in FIG. 1) surrounded by the guide panel 130 and the liquid crystal panel (110 in FIG. 1) positioned on the upper portion of the guide panel 130 Only the configuration of the cover bottom 150, the guide panel 130, and the case top 140, which is a characteristic feature of the present invention, will be described in detail.

2A and 2B, the cover bottom 150 includes a horizontal surface 151 and a side surface 153 perpendicular to the horizontal surface 151. At this time, the one side edge 153a of the cover bottom 150 A third fastening protrusion 155 is formed on the outer side surface of the side surface 153 of the second side wall 153.

A fixing emboss 157 is protruded in the vicinity of the four corners of the horizontal surface 151 and a side surface 153 is formed at an edge where the two side surfaces 153 meet at both sides in the longitudinal direction of the one edge 153a A cover bottom chamfered portion 159 in which a part of the corner is separated is formed.

The height h1 of the fastening embossment 157 does not exceed the height h2 of the side surface 153 of the cover bottom 150 and the height h1 of the fastening embossment 157 does not exceed the height h2 of the side surface 153 of the cover bottom 150, (D) of the upper and lower plates (130, 130).

The width w1 of the fastening embossment 157 can be freely designed within a range that does not exceed the width w2 of the guide panel 130. [

The guide panel 130 mounted on the cover bottom 150 includes a vertical part 131 and a horizontal part 133 vertically protruding inwardly from the vertical part 131. The lower part 133 of the vertical part 131 An embossing hole 128 into which a fastening emboss 157 formed on a horizontal surface 151 of the cover bottom 150 is inserted is formed.

The embossing hole 138 is formed to have a height and a width corresponding to the engaging embossing 157 formed on the horizontal surface 151 of the cover bottom 150 so that the engaging embossing 157 is stuck in the embossing hole 138 So that it can be inserted.

The side edge 153 of the cover bottom 150 is provided on both side edges of one edge 131a of the guide panel 130 corresponding to the detached cover bottom chamfer 159, A step 135 is formed in which a part of the step is formed at a predetermined interval and a first fastening protrusion 137 is protruded from the step 135. [

A second fastening protrusion 139 protrudes from the upper surface of the vertical portion 131 of the edge 130a of the guide panel 130.

2C and 2D, the guide panel 130 and the cover bottom 150 are mounted on the inside of the cover bottom 150 to be assembled and fastened to each other, The cover bottom 150 is pushed upward from the upper side of the guide panel 130 so that the outer surface of the vertical portion 131 of the cover bottom 130 is in contact with the inner side surface of the side surface 153 of the cover bottom 150, The cover bottom 150 and the guide panel 130 are assembled and fastened to each other.

At this time, the embossing 157 formed on the horizontal surface 151 of the cover bottom 150 is inserted into the embossing hole 138 formed on the lower surface of the vertical portion 131 of the guide panel 130, The cover 130 and the cover bottom 150 are fixed to each other.

At this time, the guide panel 130 is prevented from flowing in the X-axis direction and the Y-axis direction defined by the drawing by the fastening embossing 157 inserted into the embossing hole 138.

That is, the guide panel 130 made of a synthetic resin material such as polycarbonate has characteristics such as the heat generated by the driving of the liquid crystal panel (110 in FIG. 1) or the driving of the backlight unit (120 in FIG. 1) Shrinkage and swelling occur due to temperature changes due to, for example,

The liquid crystal display device of the present invention is configured such that the embossed hole 138 of the guide panel 130 allows the cover bottom 150 to be in contact with the guide panel 130, It is possible to prevent the guide panel 130 from flowing in the X axis direction and the Y axis direction defined by the drawing.

That is, when the guide panel 130 is about to generate a flow in the X-axis direction or the Y-axis direction, the embossing hole 138 formed in the vertical portion 131 of the guide panel 130 is engaged with the cover bottom 150 The flow of the guide panel 130 is blocked as it is in close contact with the embossment 157.

The first fastening protrusions 137 formed at the step 135 and the step 135 formed at the vertical part 131 at both side edges in the longitudinal direction of the one edge 130a of the guide panel 130 are inserted into the cover bottom 150 And is exposed to the outside through the cover bottom chamfered portion 159 of the cover.

Next, a blade-type case column 140 is positioned in front of the guide panel 130. The blade-type case column 140 is formed corresponding to one edge 130a of the guide panel 130, A first fastening hole 145 is formed in the first edge 141 of the top 140 to receive a second fastening protrusion 139 formed on the upper surface of the vertical portion 131 of the guide panel 130 And a second fastening protrusion 155 formed on the outer surface of the side surface 153 of the one edge 150a of the cover bottom 150 is inserted into the second fastening hole 147, have.

A case top chamber portion 148 is formed on both sides of the second edge 143 in the longitudinal direction of the case top 140. The case top chamber portion 148 is formed with a guide panel And a fastening part 149 is formed at the end of the fastening part 149 so as to be fastened to the first fastening protrusion 137 of the guide panel 130. [ Is formed.

The case top 140 is assembled and fastened to the guide panel 130 and the cover bottom 150 assembled and fastened to each other as shown in FIGS. 2E and 2F. 143 from the upper side to the lower side and the cover bottom 150 from the lower side to the upper side so as to be in contact with the outer surface of the side surface 153 of the cover bottom 150, 140 are assembled and fastened to each other.

At this time, the third fastening protrusion 155 formed on the outer surface of the side surface 153 of the cover bottom 150 is inserted into the second fastening hole 147 formed in the second edge 143 of the case top 140 The cover bottom 150 and the case top 140 are assembled and fastened to each other.

The second fastening protrusion 139 formed on the upper surface of the vertical portion 131 of the guide panel 130 is inserted into the first fastening hole 145 formed in the first edge 141 of the case top 140, So that the guide panel 130 and the case top 140 are also assembled and fastened to each other.

Therefore, the guide panel 130, the case top 140, and the cover bottom 150 are integrally assembled and fastened together.

Particularly when the step 135 of the guide panel 130 exposed to the outside through the cover bottom chamfer portion 159 of the cover bottom 150 is fastened to one side of the case top chamber portion 148 of the case top 140 And the fastening end 149a formed on the fastening part 149 is engaged with the first fastening protrusion 137 formed on the step 135 of the guide panel 130 and assembled together.

Therefore, the liquid crystal display of the present invention can simultaneously fix the X axis direction, the Y axis direction, and the Z axis fastening direction defined in the drawing. Therefore, the modularized state can be maintained more stably and the mechanical strength of the liquid crystal display device is increased.

That is, in the liquid crystal display of the present invention, the guide panel 130 and the case top 140 are connected to each other through the second fastening protrusion 139 of the guide panel 130 and the first fastening hole 145 of the case top 140 The cover bottom 150 and the case top 140 are assembled with each other through the third fastening protrusion 155 of the cover bottom 150 and the second fastening hole 147 of the case top 140 The cover bottom 150, the guide panel 130, and the case top 140 are fixed to have the fastening force in the X-axis, the Y-axis, and the Z-axis direction defined in the drawing.

Accordingly, the liquid crystal display device of the present invention can have a fastening force in the X axis direction, the Y axis direction, and the Z axis fastening direction defined in the drawing.

More specifically, the case top 140 and the guide panel 130 are coupled with each other through the fastening end 149a of the case top 140 and the first fastening protrusion 137 of the guide panel 130, The modularized state can be more stably maintained and the mechanical strength of the liquid crystal display device is increased.

3 is a cross-sectional view taken along the line III-III in FIG. 1, and FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG.

3, the LED assembly 129 including the reflection plate 125, the light guide plate 123, the PCB 129b on which the LED 129a and the LED 129a are mounted, and the light guide plate 123 The optical sheets 121 are stacked to form the backlight unit 120. [

A liquid crystal panel 110 in which a liquid crystal layer (not shown) is interposed between the first and second substrates 112 and 114 and the first and second substrates 112 and 114 are disposed on the backlight unit 120, And 114 are attached with polarizing plates 119a and 119b selectively transmitting only specific light.

The liquid crystal panel 110 and the backlight unit 120 are surrounded by the vertical portion 131 of the guide panel 130. The liquid crystal panel 110 includes protrusions 133 projecting inward of the vertical portion 131 As shown in Fig.

The liquid crystal panel 110 and the backlight unit 120 surrounded by the guide panel 130 are seated on the horizontal surface 151 inwardly of the side surface 153 of the cover bottom 150, The outer surface of the vertical portion 131 of the cover bottom 150 is in close contact with the inner surface of the side surface 153 of the cover bottom 150.

The first edge 141 of the case top 140 covers the top edge of the liquid crystal panel 110 and the second edge 143 vertically bent at the first edge 141 contacts the top edge of the cover bottom 150 And is assembled with the cover bottom 150 so as to surround the outer side surface of the side surface 153.

At this time, the third fastening protrusion 155 formed on the outer surface of the side surface 153 of the cover bottom 150 is inserted into the second fastening hole 147 formed in the second edge 143 of the case top 140 The second fastening protrusion 139 formed on the upper surface of the vertical portion 131 of the guide panel 130 is inserted into the first fastening hole 145 formed in the first edge 141 of the case top 140 .

Therefore, the guide panel 130, the cover bottom 150, and the case top 140 are assembled and fastened to each other and have a fastening force in the X axis direction, the Y axis direction, and the Z axis direction defined in the drawing.

The embossing 157 formed near the four corners of the horizontal surface 151 of the cover bottom 150 is inserted into the embossing hole 138 formed in the lower surface of the vertical portion 131 of the guide panel 130 , The guide panel 130 and the cover bottom 150 are fixed to each other.

Therefore, the guide panel 130 is prevented from flowing in the X-axis direction and the Y-axis direction defined by the drawing by the fastening embossment 157 inserted into the embossing hole 138.

4, the first fastening protrusion 137 formed at the step 135 and the step 135 of the guide panel 130 is fastened to the outer surface of the cover 130 by the cover bottom chamfer 159 of the cover bottom 150, And the fastening part 149 of the case top 140 is assembled and fastened to the step 135 of the guide panel 130. The fastening part 149 formed at the end of the fastening part 149 of the case top 140 149a of the guide panel 130 and the first fastening protrusion 137 formed at the step 135 of the guide panel 130 are engaged and assembled together.

Therefore, the fastening end 149a of the case top 140 assembled with and fastened to the first fastening protrusion 137 of the guide panel 130 further improves the fastening force in the Z-axis direction defined in the drawing, The modularized state can be maintained, and the mechanical strength of the liquid crystal display device is increased.

The following Table (1) shows the simulation results obtained by comparing the fluidity of the guide panel 130.

Shrinkage
(First edge) Shrinkage
(The second edge opposite the first edge) Sample 1 0.42mm 0.43mm Sample 2 0.091mm 0.061mm

Here, Sample 1 is a simulation result of measuring the shrinkage amount of the guide panel of the liquid crystal display device when the guide panel and cover bottom are not fixed, and Sample 2 is a simulation result of the horizontal surface 1551 of the cover bottom 150 And the embossing hole 138 is formed on the lower surface of the vertical portion 131 of the guide panel 130 corresponding to the fastening embossment 157, The guide panel 130 and the cover bottom 150 are inserted into the embossing hole 138 of the guide panel 130 to measure the amount of shrinkage of the guide panel 130 of the liquid crystal display device.

Referring to Table 1, it can be seen that the amount of shrinkage of the guide panel 130 of Sample 2 is significantly reduced compared to that of Sample 1. The amount of shrinkage of the guide panel 130 corresponds to the amount of flow of the guide panel 130.

Therefore, as in the embodiment of the present invention, the fastening embossment 157 is formed near the four corners of the horizontal surface 151 of the cover bottom 150 and the vertical portion of the guide panel 130 corresponding to the fastening embossment 157 The embossing hole 138 is formed in the lower surface of the cover panel 131 so that the embossing engaging hole 157 is inserted into the embossing hole 138 to temporarily fix the guide panel 130 and the cover bottom 150, It can be seen that the flow of the panel 130 can be prevented.

This can prevent the flow of the light guide plate 123 due to the flow of the guide panel 130. This prevents breakage of the LEDs 129a of the LED assembly 129, It is possible to prevent the problem that the optical characteristics of the apparatus are changed and the image quality is lowered.

5A to 5B are cross-sectional views showing the fastening force of the case top and the guide panel in the Z-axis direction.

As shown in the figure, the step 135 of the guide panel (130 in FIG. 4) exposed to the outside through the cover bottom chamfer portion (159 in FIG. 4) of the cover bottom 4) of the guide panel (130 in FIG. 4) by forming the step 135 in the guide panel (130 in FIG. 4) It is possible to prevent the fastening portion 149 of the case column 140 from protruding to the outside even if it is in close contact with the outside of the portion 131 to prevent the bezel region of the liquid crystal display device from being widened.

The fastening end 149a formed at the end of the fastening part 149 is engaged with and fastened to the first fastening protrusion 137 formed at the step 135 of the guide panel 130 The fastening end 149a formed at the end of the fastening part 149 is engaged with the first fastening protrusion 137 to prevent the flow of the case top 140 in the + Z axis direction defined in the drawing do.

As shown in Fig. 5B, in the -Z-axis direction defined by the drawing, the fastening end 149a formed at the end of the fastening portion 149 is engaged with the vertical portion 131 of the guide panel 130 Thereby preventing the flow of the case top 140.

When the fastening end 149a is engaged with the vertical portion 131 of the guide panel 130 as shown in FIG. 6, the fastening end 149a is pressed against the case top 140 It is possible to disperse the stress acting on the guide panel (130 in FIG. 4), and it is possible to prevent the shape change of the case column 140 due to the stress from occurring.

Accordingly, it is possible to prevent the liquid crystal panel (110 of FIG. 4) from being pressed by the case top 140, thereby preventing light leakage phenomenon. Thus, the luminance and image quality of the liquid crystal display device can be improved.

It is preferable that the corners of the case top 140 and the cover bottom (150 in FIG. 4) be curved due to the drawing process to increase the rigidity of the case top 140 and the cover bottom (150 in FIG. 4) .

That is, when the case top 140 made of a metal material and the cover bottom (150 in FIG. 4) are configured so as to be angled without being subjected to a curved treatment, a phenomenon that stress concentrates on the edge portion of the angled corner portion The edge portion can easily twist or warp.

Therefore, since the four corners of the case top 140 and the cover bottom (150 in FIG. 4) are curved, the case top 140 and the cover bottom (150 in FIG. 4) It is possible to prevent a phenomenon of twisting or bending of the corners of the frame.

The case top 140 and the cover bottom (150 in FIG. 4) are connected through a case top chamber (148 in FIG. 2F) and a cover bottom chamber (159 in FIG. 4) The case top 140 and the cover bottom (150 in FIG. 4) having curved edges using the malleability of a metallic material such as iron can be easily manufactured.

As described above, the liquid crystal display according to the embodiment of the present invention forms a fastening emboss (157 in FIG. 4) on the horizontal surface (151 in FIG. 4) of the cover bottom (150 in FIG. 4) 4) is formed on the lower surface of the vertical portion 131 of the guide panel (130 in Fig. 4), and the embossed hole (138 in Fig. 4) The step 135 including the first fastening protrusion 137 is formed at both side edges in the longitudinal direction of the first fastening protrusion 137a and the case fastening protrusion 137 is engaged with the first fastening protrusion 137 to be assembled and fastened The liquid crystal display device of the present invention can fix the X axis direction, the Y axis direction, and the Z axis direction, which are defined in the drawing, at the same time.

Therefore, the modularized state can be maintained more stably and the mechanical strength of the liquid crystal display device is increased.

4), the guide panel (130 in FIG. 4), and the case top 140 are assembled and fastened through a hook type fastening system, the cover bottom (FIG. 4 The liquid crystal display device having a narrow bezel can be realized due to the fact that the fixing member (not shown) such as a screw is not used by more securely fastening the guide plate 150 .

This makes it possible to prevent an increase in the material cost due to the consumption of a fixing member (not shown) such as a screw or the like, and the liquid crystal panel 110 (see FIG. 4) It is possible to minimize the time, cost, and waste of manpower in modularizing the liquid crystal display device.

4) is provided on the lower surface of the vertical portion 131 of the guide panel (130 in FIG. 4), and the embossed fixing hole (138 in FIG. 4) The flow of the guide panel (130 in FIG. 4) can be prevented even if the guide panel (130 in FIG. 4) is shrunk and expanded due to the material properties.

4) can be prevented from flowing due to the flow of the guide panel (130 in FIG. 4), thereby preventing the LEDs (129 in FIG. 4) It is possible to prevent the occurrence of breakage of 129a of the liquid crystal display device or deterioration of the image quality due to a change in the optical characteristics of the liquid crystal display device.

4) and the edge of the case top 140 exposed through the cover bottom chamfer portion (159 in Fig. 4) of the cover bottom (150 in Fig. 4) 4) and the case column 140 by improving the fixing force when fastening the guide panel 130 and the case column 140 to each other, the modularized state can be more stably maintained, Thereby increasing the mechanical strength of the device.

4) may be referred to as a support main or main support or a mold frame, and the cover bottom (150 in Fig. 4) may be referred to as a bottom cover It may also be referred to as a cover or a bottom cover.

The present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

And a second guide member for guiding the second guide member to the first guide member and the second guide member.
The present invention relates to a method of manufacturing a semiconductor device, which comprises: a case top (141), a first edge (143), a second edge (145), a first fastening hole (147), a first fastening hole (147)
A cover bottom portion 151 and a cover bottom portion 153. The cover bottom portion 151 and the bottom cover 153 are formed in the same manner as in the first embodiment.

Claims (10)

A liquid crystal panel;
A backlight unit positioned below the liquid crystal panel;
A cover bottom having a horizontal surface on which the liquid crystal panel and the backlight unit are mounted and a side surface perpendicular to the horizontal surface, and a fastening emboss is formed near four corners of the horizontal surface;
And an embossment hole which is seated on the cover bottom and is composed of a vertical part covering an edge of the liquid crystal panel and the backlight unit and a horizontal part seated on the liquid crystal panel, A guide panel formed with first fastening protrusions formed at both side edges in the longitudinal direction of the one edge;
And a fastening portion that is formed of a blade type corresponding to one edge of the guide panel and is engaged with and fastened to the first fastening protrusion,
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Wherein the case top comprises a first edge covering a part of the upper surface edge of the liquid crystal panel and a second edge perpendicular to the first edge and in contact with an outer surface of a side surface of the cover bottom, And a second fastening protrusion inserted into the first fastening hole formed at the first edge.
The method according to claim 1,
Wherein at least one edge of the guide panel is recessed inwardly from an outer surface of the vertical portion at both side edges in a longitudinal direction of the one edge of the guide panel, and the first fastening protrusion is located at the edge.
3. The method of claim 2,
A cover bottom chamfer is formed on both sides of a longitudinal direction of one edge of the cover bottom corresponding to one edge of the guide panel, and the coupling portion is formed through the cover bottom chamfer portion of the guide panel that is seated on the cover bottom And is fitted to the stepped portion exposed to the outside.
The method according to claim 1,
Wherein a fastening end is formed at an end of the fastening part, and the fastening end is engaged with and fastened to the first fastening protrusion.
delete The method according to claim 1,
And a third fastening protrusion inserted into the second fastening hole formed at the second edge is formed at an outer side surface of the side surface of the cover bottom.
The method according to claim 1,
The height of the fastening embossment does not exceed the height of the side surface of the cover bottom and does not exceed the thickness of the guide panel, and the width of the fastening embossed portion is equal to the width of the guide panel The liquid crystal display device does not exceed.
8. The method of claim 7,
Wherein a height and a width of the embossment fixing hole correspond to a height and a width of the fixing embossment.
The method according to claim 1,
And the edges of the case top and the cover bottom are curved.
The method according to claim 1,
Wherein the backlight unit includes an LED assembly, a light guide plate, and an optical sheet.

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