KR102109660B1 - Liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display device.
The liquid crystal display device according to the present invention includes a liquid crystal panel, a fixer attached along a rear edge of the liquid crystal panel and having a through groove in the center, a backlight unit for supplying light to the liquid crystal panel, the liquid crystal panel and the backlight Located between the units, a support main having a support groove formed along an outer surface, a vertical case surrounding the side of the support main, and a horizontal portion perpendicular to the vertical portion, and a top case coupled to the side of the support main Including, the horizontal portion of the top case to include a first horizontal portion that is inserted into the through-groove of the fixture and a second horizontal portion that is seated in the support groove of the support main.
Through this, it is possible to implement a liquid crystal display device having a reliability to protect the liquid crystal panel by an external impact while having a narrow bezel.

Description

Liquid crystal display device {LIQUID CRYSTAL DISPLAY DEVICE}

The present invention relates to a liquid crystal display device, and particularly to a liquid crystal display device that is implemented with a narrow bezel by applying a fixer.

In accordance with the recent information age, the display field has also rapidly developed, and in response, a liquid crystal display device (LCD) and organic light emitting display device having advantages of thinning, lightening, and low power consumption. 2. Description of the Related Art Diode (organic light emitting diode) displays have excellent performance and are widely used.

Here, a liquid crystal display device (LCD), which is actively used in TVs, monitors, and mobile phones 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 imaging by polarization.

This liquid crystal display device is a liquid crystal panel (liquid crystal panel) bonded by interposing a liquid crystal layer between two parallel substrates (substrate), and 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 the difference in transmittance as an image. To this end, a backlight unit having a light source is disposed on the rear surface of the liquid crystal panel.

Here, the backlight unit is divided into a direct type and an edge type according to the position of the light source. In the direct type backlight unit, the light emitted from the light source is directly disposed by placing the light source under the liquid crystal panel. A method of supplying to a liquid crystal panel, and the backlight unit of the side type method indirectly injects light emitted from the light source by using refraction and reflection in the light guide plate by arranging the light guide plate under the liquid crystal panel and placing the light source on at least one side of the light guide plate. It is a method of supplying to a liquid crystal panel.

The liquid crystal panel and the backlight unit are modularized into a liquid crystal display module by a case top, a support main, and a cover bottom.

On the other hand, recently, the liquid crystal display device has a wide display area as the use area of the portable computer as well as the desktop computer monitor and the wall-mounted TV is diversified, and at the same time, research has been actively conducted to implement the liquid crystal display device having a narrow bezel. However, there is a limitation in narrowing the bezel as the front edge of the liquid crystal panel is surrounded by the case top.

An object of the present invention for solving the above problems is to provide a liquid crystal display device capable of stably binding a liquid crystal panel and a backlight unit to each other while realizing a narrow bezel through a fixer.

In addition, another object of the present invention is to provide a liquid crystal display device having reliability that can protect the liquid crystal panel from external impact by allowing the fixer fixed by the case top to provide a space for the liquid crystal panel to flow due to external impact. .

A liquid crystal display device according to an embodiment of the present invention for achieving the above object, a liquid crystal panel; A fixer attached along a rear edge of the liquid crystal panel and having a through groove in the center; A backlight unit supplying light to the liquid crystal panel; A support main positioned between the liquid crystal panel and the backlight unit and having a support groove formed along an outer surface; It includes a vertical part surrounding the side of the support main and a horizontal part perpendicular to the vertical part, and includes a top case coupled to the side of the support main, and the horizontal part of the top case is inserted into a through groove of the fixer. It characterized in that it comprises a horizontal portion and a second horizontal portion seated in the support groove of the support main.

Here, the height of the through groove of the fixer is formed higher than the thickness of the horizontal portion of the top case, so that a flow space through which the liquid crystal panel can flow is provided through the through groove.

The support groove is a first support groove formed to have a first height corresponding to the total height of the fixer in a first area to which the fixer is coupled, and a second area excluding the first area, which is lower than the first height. It characterized in that it comprises a second support groove formed to have a second height.

At this time, the second height is characterized in that the same as the sum of the thickness of the flow space and the horizontal portion.

The fixer includes a first portion contacting the rear surface of the liquid crystal panel, a second portion facing the first portion, and a third portion including a through groove in the center and connecting the first portion and the second portion. It is characterized by including.

As described above, according to the liquid crystal display device according to the exemplary embodiment of the present invention, the liquid crystal panel is supported through the fixer so that the case top can be coupled to the side of the support main.

Through this, as the front edge of the liquid crystal panel is not surrounded by the top case, a narrow bezel is realized and a liquid crystal display device having a beautiful appearance is realized.

In addition, it is possible to protect the liquid crystal panel from external impact by providing a space for the liquid crystal panel to move by allowing the flow gap between the fixer and the case top to remain constant. Through this, it is possible to prevent an egg mura, which is a screen stain that may occur when a part of the liquid crystal panel is pressed even when an external shock is applied.

1 is a side perspective view partially showing a liquid crystal display device according to an exemplary embodiment of the present invention.
Figure 2 is a side view of Figure 1;
3 is a perspective view showing a fixer attached to a liquid crystal panel according to an embodiment of the present invention.
4 is a cross-sectional view of a portion cut along A-A 'in FIG. 2;
5 is a cross-sectional view of a portion cut along B-B 'of FIG. 2.
6 is a perspective view showing a case in which the case top is omitted in the liquid crystal display device shown in FIG. 1.

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

1 is a perspective view showing a side of a liquid crystal display according to an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a perspective view showing a fixer attached to a liquid crystal panel according to an embodiment of the present invention , FIG. 4 is a cross-sectional view of a portion cut along A-A 'in FIG. 2, FIG. 5 is a cross-sectional view of a portion cut along B-B' in FIG. 2, and FIG. 6 is a case top in FIG. This is a perspective view showing the omission.

As illustrated, the liquid crystal display device 100 includes a liquid crystal panel 110, a backlight unit 120, and a support main 130 for modulating the liquid crystal panel 110 and the backlight unit 120, a cover bottom ( 150), a case top 140, and a fixture 170.

The liquid crystal panel 110 is a part that plays a key role in image expression, and is composed of first and second substrates 112 and 114 bonded to each other with a liquid crystal layer interposed therebetween.

Here, 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 under the premise of an active matrix method, and each intersection point A thin film transistor (TFT) is provided to be connected one-to-one to a transparent pixel electrode formed in each pixel.

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

In addition, a transparent common electrode corresponding to the pixel electrode may be provided on the first substrate 112 or the second substrate 114.

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

In addition, although not shown in the drawings, the driving printed circuit board is connected through a connecting member such as a flexible circuit board or a tape carrier package (TCP) along at least one edge of the liquid crystal panel 110 to modularize the process. From the side of the support main 130 or the cover bottom 150, it can be properly flipped to the back and close.

Accordingly, the liquid crystal panel 110 having the above-described structure is a data driving circuit when a thin film transistor selected for each gate line is turned on by an on or off signal of a gate driving circuit transmitted through a driving printed circuit board (not shown). The signal voltage of is transmitted to the corresponding pixel electrode through the data line, and accordingly, the arrangement direction of the liquid crystal molecules is changed by the electric field between the pixel electrode and the common electrode, thereby indicating a difference in transmittance.

A plurality of fixers 170 are provided along the rear edge of the liquid crystal panel 110.

Here, the plurality of fixers 170 are attached along the rear edge of the liquid crystal panel 110 during the modularization process, and serve to support the liquid crystal panel 110.

In addition, the plurality of fixtures 170 are fixed by the position of the top case 140 and the support main 130 coupled through the side of the backlight unit 120, so that the liquid crystal display device 100 according to the present invention is four. It can be implemented with a low bezel. That is, in the prior art, the top case was combined to surround the front edge of the liquid crystal panel, but in the present invention, the narrow bezel is formed by applying the fixer 170 so that the top case 140 is coupled to surround the side of the backlight unit 120. It can be implemented.

In addition, the plurality of fixers 170 serves to provide a flow space G through which the liquid crystal panel 110 can flow due to external impact.

Each of the plurality of fixers 170 includes a first portion 172 contacting the liquid crystal panel, a second portion 174 facing the first portion 172, and a through groove 175 penetrating through the center. It is made of a third portion connecting the first portion 172 and the second portion 174 through each of both edges of the through groove 175.

Accordingly, each of the plurality of fixers 170 may have, for example, a rectangular shape having a through groove 175 in the center.

Here, the through groove 175 is a component that allows the horizontal portion 144 of the top case 140 to be inserted while providing a flow space G through which the liquid crystal panel 110 can flow. This will be described in more detail later.

The rear surface of the liquid crystal panel 110 is provided with a backlight unit 120 that supplies light to display a difference in transmittance as an image.

The backlight unit 120 includes a plurality of LED assemblies 129, a reflector plate 121 positioned on the plurality of LED assemblies 129, a diffuser plate 124 positioned above the reflector plate 121, and a diffuser plate. It includes a plurality of optical sheets 126 located on top of (124).

Each of the plurality of LED assemblies 129 is made by being mounted on an LED Printed Circuit Board (PCB) 129b with a plurality of LEDs 129a spaced apart at regular intervals.

The plurality of LED assemblies 129 are arranged side by side in a state spaced apart at a predetermined interval on the cover bottom 150, or are arranged side by side along the longitudinal direction of the cover bottom 150 or along a direction perpendicular to the longitudinal direction. Can be arranged side by side.

Meanwhile, the LED printed circuit board 129b in which a plurality of LEDs 129a are mounted may correspond to a metal core printed circuit board having a heat dissipation function, and the rear surface of the metal core printed circuit board A heat sink (not shown) is provided to allow heat generated from each of the plurality of LEDs 129a to be discharged to the outside.

The upper portion of the LED printed circuit board 129b is a reflector 121 for reflecting some of the light emitted from each of the plurality of LEDs 129a toward the cover bottom 150 toward the liquid crystal panel 110. .

Here, the reflector 121 is provided with a plurality of LED through holes 121a through which each of the plurality of LEDs 129a may pass, corresponding to each of the plurality of LEDs 129a included in the plurality of LED assemblies 129. , Each of the plurality of LEDs (129a) through each of the plurality of LED through-holes (121a) is exposed through it can be seated on the top of the LED printed circuit board (129c).

The reflective plate 121 may be formed of a white or silver plate.

In addition, a diffusion plate 124 for diffusing light is positioned at an upper portion of the reflective plate 121 with an optical gap therebetween.

At this time, the optical gap is a gap required to form light uniformity by diffusing light emitted from each of the plurality of LEDs 129a.

In addition, a plurality of optical sheets 126 are positioned above the diffusion plate 124.

Here, the plurality of optical sheets 126 may include a diffusion sheet and at least one condensing sheet and a protective sheet. In this case, a functional sheet such as a dual brightness enhancement film called a DBEF (dual brightness enhancement film) capable of increasing brightness with one of the plurality of optical sheets is included to further increase the brightness of light emitted from the plurality of LEDs 129a. have.

The liquid crystal panel 110 and the backlight unit 120 having the above-described structure are modularized through a fixer 170, a support main 130, a case top 140, and a cover bottom 150.

Here, the support main 130 is located between the liquid crystal panel 110 and the backlight unit 120 to distinguish the liquid crystal panel 110 and the backlight unit 120 and to fix the position of the case top 140 at the same time. Do it.

The support main 130 is provided with a support groove 132 formed along the outer surface, the support groove 132 is formed in a form of a certain depth inward from the outer surface.

The case top 140 is perpendicular to the vertical portion 142 and the vertical portion 142 that surround the side of the support main 130 and is inserted into the through groove 175 of the fixer 170 and at the same time supports the support main 130. It includes a horizontal portion 144 formed to be seated in the groove 132.

The case top 140, for example, may have a rectangular frame shape in which a cross section is bent in a shape.

In addition, the liquid crystal panel 110 and the backlight unit 120 is seated, the cover bottom 150, which is the basis for assembling the entire apparatus of the liquid crystal display module 100, is a square plate-shaped cover bottom 150. It may include a pair of bar-shaped side support (not shown) coupled to the edge of both ends facing each other.

In addition, the other two edges of the cover bottom 150, except for the side support (not shown), are bent upward at an angle so as to have the same height as these, thereby forming a predetermined space in which the backlight unit 120 can be seated. .

The above-described liquid crystal panel 110 is supported by the fixer 170 and the backlight unit 120 is surrounded by the edges by the support main 130, and the support main 130 is wrapped around the side of the support main 130. ) And the cover top 150 covering the rear surface of the backlight unit 120 and the case top 140 fixing the fixer 170 at the same time as being fixed at the same time are coupled from the side and rear of the backlight unit 120, respectively. It is integrated and modularized through the support main 130 and the fixer 170.

At this time, the case top 140, the support main 130 and the cover bottom 150 can be fastened to the screw 190 through the fastening grooves 192 provided in each for a more solid binding.

As it is modularized as described above, the light emitted from each of the plurality of LEDs 129a of the backlight unit 120 is a liquid crystal panel 110 by a reflector 121, a diffuser plate 124 and a plurality of optical sheets 126. ), And by using this, the liquid crystal panel 110 displays a high-brightness image to the outside.

Meanwhile, a pad 165 may be provided between the support main 130 and the liquid crystal panel 110, and more precisely, between the support main 130 and the edge of the first substrate 112.

Here, the pad 165 may be made of a material having adhesive properties and elasticity.

The pad 165 serves to prevent the liquid crystal panel 110 from flowing to the left and right by fixing the liquid crystal panel 110 to the support main 130, and simultaneously the liquid crystal panel 110 and the backlight unit 120. During the modularization process, the first substrate 112 may be protected.

In the liquid crystal display device 100 according to the present invention having the above-described structure, the horizontal portion 144 of the top case 140 is inserted and seated in the support groove 132 of the support main 130 so that the case top 140 The position is fixed, and the flow space G of the liquid crystal panel 110 is provided through the fixer 170 fixed by the case top 140 and the support main 130.

This will be described in more detail with reference to FIGS. 4 to 6.

First, the support groove 132 provided on the support main 130 is composed of a first support groove 132a and a second support groove 132b.

First, in the first area FA to which the fixer 170 is coupled, the first surface and the second surface adjacent to the first surface are opened by having a first height H1 corresponding to the overall height of the fixer 170. The first support groove 132a is formed. At this time, the fixer 170 is positioned in the first support groove 132 so that the fixer 170 is positioned between the liquid crystal panel 110 and the support main 130.

In addition, the second height (H2) lower than the first height (H1) so that the horizontal portion 144 of the top case 140 is inserted and fixed in the second area (TCA) other than the first area (FA). By having a second support groove 132, the first surface is opened. At this time, the second height (H2) may be as much as the sum of the thickness of the horizontal portion 144 of the flow space (G) and the top case 140 for the protection of the liquid crystal panel 110. That is, as shown in FIGS. 4 and 5, the support main 130 includes a first vertical portion (lower left portion) coupled with the vertical portion 142 of the top case 140 and an inner side of the first vertical portion. The second vertical portion (right upper portion), and includes a horizontal portion connecting the first vertical portion and the second vertical portion, the horizontal portion of the support main 130, the first horizontal portion of the top case 170 (144a) ) And a first thickness (FIG. 4) and a second thickness greater than the first thickness corresponding to the first horizontal portion 144b of the top case 170 (FIG. 5).

To this end, the horizontal portion 144 of the top case 140 may be seated in the first horizontal portion 144a inserted into the through groove 175 of the fixer 170 and the support groove 132 of the support main 130. It is composed of the remaining second horizontal portion (144b) formed so. At this time, the fixer 170 is provided with a first portion 172 in contact with the rear surface of the liquid crystal panel 110, a second portion 174 facing the first portion 172, and a through groove 175 in the center. It includes and includes a third portion 176 connecting the first portion and the second portion, as shown in Figure 4, the first portion 172 of the fixer 170 toward the center of the liquid crystal panel 110 It protrudes from the third portion 176. Accordingly, the third portion of the fixer 170 and the second vertical portion of the support main 130, that is, the support main 130 are spaced apart from each other, and the end of the first horizontal portion 144a of the top case 140 is a fixer ( It penetrates through the through groove 175 of 170 and is placed in the first support groove, which is a space between the third portion 176 of the fixer 170 and the second vertical portion of the support main 130.

Accordingly, the top case 140 is seated on the second support groove 132b of the support main 130 so that the position is fixed so that the top case 140 is not hit, and a fixer not covered by the top case 140. A portion of the through groove 175 of the 170 is to be kept constant in the flow space (G) of the liquid crystal panel 110. That is, the height of the through groove 175 of the fixer 170 is formed higher than the thickness of the horizontal portion 144 of the top case 140, and the through groove 175 through the second horizontal portion 144b of the top case 140. ), The first horizontal portion (144a) is located, the position is to be fixed.

To explain this further, if the support main 130 is not provided with the support groove 132 in a state where the position of the case top 140 is not fixed, the case top 140 may be subject to external shock or lapse of time. The fixer 170 is struck down through the through groove 175. At this time, the edge of the liquid crystal panel 110 is struck as the case top 140 and the fixer 170 are struck together by the force that the case top 140 is struck downward, and eventually the pixar 170 is A problem that may be separated from the liquid crystal panel 110 may occur. In addition, there is a problem in that the flow space of the liquid crystal panel 110 provided by the fixer 170 is not kept constant as the case top 140 is struck.

On the other hand, in the present invention, the position of the case top 140 is fixed through the support groove 132 of the support main 130, and the position of the fixer 170 is fixed by the case top 140 and the support main 130. By doing so, the flow space G for the liquid crystal panel 110 can be constantly provided through the fixer 170.

On the other hand, the aforementioned case top 140 is also referred to as a top cover or top case, the support main 130 is also called a guide panel or main support, a mold frame, and the cover bottom 150 is also called a bottom cover. Sometimes it loses.

On the other hand, in the above, it has been described by applying the direct-type liquid crystal display device in which the light source is located at the lower portion of the liquid crystal panel, but is not limited thereto. , It is obvious that the narrow bezel can be realized by applying the support main and the top case.

That is, the embodiments of the present invention as described above are only exemplary, and a person having ordinary knowledge in the technical field to which the present invention pertains can freely deform without departing from the gist of the present invention. Accordingly, the protection scope of the present invention includes the appended claims and modifications of the present invention within the scope equivalent thereto.

100: liquid crystal display 110: liquid crystal panel
120: backlight unit 121: reflector
124: diffuser plate 126: multiple optical sheets
129: LED assembly 130: support main
132: support groove 140: top case
142: vertical portion 144: horizontal portion
150: Cover Battle 170: Fixer
175: through groove

Claims (6)

A liquid crystal panel;
It is attached spaced apart from each other along the rear edge of the liquid crystal panel, each of which includes a first portion in contact with the rear surface of the liquid crystal panel, a second portion facing the first portion, and a through groove in the center. A plurality of fixers including a third portion connecting one portion and the second portion;
A backlight unit supplying light to the liquid crystal panel;
A support main positioned between the liquid crystal panel and the backlight unit and having a support groove formed along an outer surface;
It includes a vertical case surrounding the side of the support main and a horizontal portion perpendicular to the vertical portion and includes a top case coupled to the side of the support main,
The support groove includes a first support groove corresponding to each of the plurality of fixtures and a second support groove corresponding to a space between the plurality of fixtures,
The horizontal portion of the top case includes a first horizontal portion inserted into a through groove of the fixer and a second horizontal portion seated in a second support groove of the support main,
The first part of the fixer protrudes from the third part toward the center of the liquid crystal panel so that the third part of the fixer and the support main are spaced apart from each other, and the end of the first horizontal part of the top case penetrates the fixer. A liquid crystal display device characterized in that it is placed in the first support groove which is a space between the third part of the fixer and the support main through a groove.
According to claim 1,
The height of the through-groove of the fixer is formed higher than the thickness of the horizontal portion of the top case, thereby providing a flow space through which the liquid crystal panel can flow through the through-groove.
According to claim 2,
The first support groove has a first height corresponding to the overall height of the fixer in a first region to which the fixer is coupled, and the second support groove is formed to have a second height lower than the first height. Liquid crystal display device.
The method of claim 3,
The second height is the liquid crystal display device, characterized in that the same as the sum of the thickness of the flow space and the horizontal portion.
delete According to claim 1,
The support main includes a first vertical portion coupled to a vertical portion of the top case, a second vertical portion positioned inside the first vertical portion, and a horizontal portion connecting the first vertical portion and the second vertical portion. Included, characterized in that the horizontal portion of the support main has a first thickness corresponding to the first horizontal portion of the top case and a second thickness greater than the first thickness corresponding to the second horizontal portion of the top case Liquid crystal display device.

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