KR101860032B1 - Liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display, and more particularly to a liquid crystal display capable of being lightweight and thin.
A feature of the present invention is that it includes a plurality of panel fins assembled together with the support main along the edge of the liquid crystal panel and supporting a part of the top edge of the liquid crystal panel.
Accordingly, a lightweight and thin liquid crystal display device can be provided by eliminating the top cover, simplification and reassembly of the process are easy, and the process cost can be reduced by eliminating the top cover.

Description

[0001] Liquid crystal display device [0002]

The present invention relates to a liquid crystal display, and more particularly to a liquid crystal display capable of being lightweight and thin.

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 having a light source is disposed on the back surface of the liquid crystal panel.

Here, as a light source of the backlight unit, a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp, a light emitting diode (LED) .

In particular, LEDs are widely used as light sources for displays, having characteristics such as small size, low power consumption, and high reliability.

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

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

The liquid crystal panel 10 is constituted by first and second substrates 12 and 14 which are in contact with each other with a liquid crystal layer interposed therebetween, which plays a key role in image display.

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

The backlight unit 20 includes an LED assembly 29 arranged along the longitudinal direction of at least one side edge of the support main body 30, a white or silver reflective plate 25 seated on the cover bottom 50, 25, and a plurality of optical sheets 21 interposed therebetween.

The LED assembly 29 is formed on one side of the light guide plate 23 and includes a plurality of LEDs 29a emitting white light and an LED PCB 29b mounted on the LEDs 29a ).

The liquid crystal panel 10 and the backlight unit 20 are covered with a top cover 40 covering the upper edge of the liquid crystal panel 10 in a state where the edge is surrounded by the support main 30 having a rectangular frame shape, And the cover bottoms 50 are integrally joined to each other through the support main body 30.

In this case, the top cover 40 is formed in a rectangular shape having a cross section of "a" so as to cover the upper and side edges of the liquid crystal panel 110, As shown in Fig.

And reference numerals 19a and 19b denote polarizing plates attached to the front and back surfaces of the liquid crystal panel 10 to control the polarization direction of light, respectively.

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.

However, in spite of efforts to manufacture a liquid crystal display device of a light weight and a thin thickness, there are too many constituent elements of the liquid crystal display device, and the thinness and light weight of the liquid crystal display device are hindered.

In particular, the unnecessary processing cost of the top cover 40 increases significantly.

That is, the top cover 40 is formed by cutting a metal plate to a predetermined size of a rectangular shape, forming a rectangular opening surface on the inside of the cut metal plate, and then banding the cross- And a drawing process. At this time, since a metal plate having a relatively large area needs to be cut and removed to form the opening surface of the top cover 40, an unnecessary material cost is increased.

SUMMARY OF THE INVENTION It is a first object of the present invention to provide a thin and lightweight liquid crystal display device for solving the above problems.

Another object of the present invention is to prevent unnecessary process cost of the liquid crystal display device from being generated. A third object of the present invention is to reduce the process cost of the liquid crystal display device.

In order to achieve the above-mentioned object, the present invention provides an electronic device comprising: a cover bottom; A backlight unit mounted on the cover bottom; A liquid crystal panel mounted on the backlight unit; A support main body which is assembled with the cover bottom and is formed as a vertical part and surrounds the edge of the backlight unit and the liquid crystal panel; And a plurality of panel fins supporting a part of an upper edge of the liquid crystal panel and being assembled with the support main, wherein each of the plurality of panel fins includes a first portion and a second portion perpendicular to the first portion, And a third portion that is perpendicular to the first portion and is opposed to the first portion, wherein the vertical portion corresponds to each of the plurality of panel fins, and the through hole, through which the first portion is inserted, And a coupling groove to be assembled with the coupling groove is formed.

At least two of the plurality of panel fins are spaced apart from each other by a predetermined distance along one edge of the liquid crystal panel. The vertical part protrudes upward from the liquid crystal panel, and the through hole is protruded upward Area.

The first portion is formed to be longer than the width of the vertical portion to support a part of the edge of the liquid crystal panel through the first portion and the end of the third portion is provided with a latching end, Is provided with a latching jaw corresponding to the latching end.

The engaging end is shaped to be vertically bent toward the first portion from the end of the third portion and is tapered toward the end of the third portion, and the engaging groove corresponds to the length of the third portion Wherein the engaging groove corresponds to the length of the third portion and the size of the engaging groove is larger than the outer diameter of the engaging groove by 1.1 to 1.2 times or more. In the process of passing the engaging groove through the engaging groove, Is in close contact with the inner surface of the engaging groove.

Here, the third portion may have a length less than 1/2 of the width of the vertical portion, and the panel fin may be formed of a metal material or a plastic material.

The backlight unit may include a reflective plate and a light guide plate disposed on the reflective plate, a plurality of optical sheets disposed on the light guide plate, and a backlight unit disposed on the reflective plate, And a light source located on one side of the light guide plate.

The backlight unit includes a reflection plate, a plurality of light sources arranged on the reflection plate in parallel, and a plurality of optical sheets interposed on the light source.

As described above, by providing a plurality of panel fins assembled along the edge of the liquid crystal panel along the edge of the liquid crystal panel and supporting a part of the top edge of the liquid crystal panel according to the present invention, lightweight and thin There is an effect that a liquid crystal display device can be provided.

In addition, there is an effect that simplification and reassembly of the process are easy, and the process cost can be reduced by eliminating the top cover.

1 is a sectional view of a liquid crystal display device using a general LED as a light source.
2 is an exploded perspective view schematically illustrating a liquid crystal display device according to an embodiment of the present invention.
3 is a perspective view schematically illustrating a structure of a panel pin according to an embodiment of the present invention.
4A to 4C are perspective views schematically illustrating various structures of panel pins according to an embodiment of the present invention;
Fig. 5 is a cross-sectional view schematically showing a partial cross section of Fig. 2 modularized; Fig.
Fig. 6 is an enlarged cross-sectional view of a part of Fig. 5; Fig.

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

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

The liquid crystal display device includes a support main body 130 and a cover bottom 150 for modularizing the liquid crystal panel 110 and the backlight unit 120, the liquid crystal panel 110 and the backlight unit 120, And a panel pin (200).

The liquid crystal panel 110 is a part that plays a key role in image display and includes a first substrate 112 and a second substrate 114 which are bonded to each other with a liquid crystal layer interposed therebetween, .

At this time, a plurality of gate lines and data lines intersect to define the pixels on the inner surface of the first substrate 112, which is usually referred to as a lower substrate or an array substrate, although not shown in the drawing, A thin film transistor (TFT) is provided at each intersection and is connected in one-to-one correspondence with the transparent pixel electrode formed in each pixel.

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 at least one edge of the liquid crystal panel 110 via a connection member 116 such as a flexible circuit board or a tape carrier package (TCP) And is properly brought into close contact with the side surface of the main body 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 arrangement direction of the liquid crystal molecules is changed by the electric field between the pixel electrode and the common electrode to show 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 the rear surface of the liquid crystal display panel so that the difference in transmittance of the liquid crystal panel 110 is externally expressed.

The backlight unit 120 includes an LED assembly 129, a white or silver reflective plate 125, a light guide plate 123 seated on the reflective plate 125, and an optical sheet 121 interposed therebetween .

The LED assembly 129 is disposed on one side of the light guide plate 123 so as 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 which is mounted separately.

Here, the LED 129a is a light source. In addition to the LED 129a, a fluorescent lamp such as a cold cathode fluorescent lamp or an external electrode fluorescent lamp may be used.

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. On the other hand, 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, It can also be implemented.

The light guide plate 123 on which the light emitted from the plurality of LEDs 129a is incident is formed so that the light incident from the LED 129a travels through the light guide plate 123 by total reflection several times and spreads evenly over a wide area of the light guide plate 123 And provides a surface light source to the liquid crystal panel 110.

The light guide plate 123 may include a pattern of a specific pattern on the back surface to supply a uniform surface light source.

Here, 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.

The liquid crystal panel 110 and the backlight unit 120 are modularized through the support main 130 and the cover bottom 150 and the plurality of panel pins 200. The cover bottom 150 is formed on the back surface of the backlight unit 120 And has a horizontal surface 151 which is in close contact and a side surface 153 whose edge is vertically bent upward.

The rectangular support main body 130 of the liquid crystal panel 110 and the vertical portion 131 covering the edges of the backlight unit 120 is mounted on the cover bottom 150, do.

A plurality of panel pins 200 are disposed at predetermined intervals along the edge of the liquid crystal panel 110. Each panel pin 200 covers only a part of the upper surface of the four edges of the liquid crystal panel 110, 110 are opened to display an image to be displayed on the liquid crystal panel 110.

The plurality of panel pins 200 extend outside the vertical portion 131 of the support main body 130 and are assembled with the support main body 130.

At this time, the vertical part 131 of the support main body 130 is formed with a through hole 135 and a coupling groove 137 for assembly with a plurality of panel pins 200.

Accordingly, the plurality of panel pins 200, the support mains 130, and the cover bottoms 150 coupled with the support mains 130 are all modularly integrated.

That is, the liquid crystal panel 110 and the backlight unit 120 of the present invention are surrounded by the vertical portion 131 of the support main 130, and the detachment of the backlight unit 120 through the cover bottom 150 .

In addition, a part of the upper surface of the four edges of the liquid crystal panel 110 is covered with the plurality of panel pins 200, thereby preventing the liquid crystal panel 110 from being attached or detached.

This is because a plurality of panel fins 200 can replace the conventional top cover 40 (Fig. 1), so that the liquid crystal display can be made light and thin by eliminating the top cover 40 (Fig. 1) Simplification of the process and reassembly are easy.

Further, the elimination of the top cover (40 in Fig. 1) can reduce the process cost.

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

3 is a perspective view schematically showing a structure of a panel pin according to an embodiment of the present invention.

The panel pin 200 includes a first portion 210 and a second portion 220 perpendicular to the first portion 210 and a second portion 220 perpendicular to the first portion 210 and the second portion 220, And a third portion 230 facing horizontally. A hook 240 is formed at the end of the third portion 230.

2) of the liquid crystal panel (110 in FIG. 2), and the third portion 230 covers the vertical portion (131 in FIG. 2) of the support main (130 in FIG. 2) So that the panel pin 200 is fixed.

The engaging end 240 has a shape bent perpendicularly toward the first portion 210 to assemble the panel pin 200 and the support main body 130 in FIG. And has a tapered shape toward the end of the tapered portion.

The hooking end 240 has a hook shape.

2) of the support main (130 in FIG. 2) is formed in the vertical portion (131 in FIG. 2) of the support main (137 in Fig. 2) into which the third portion 230 is fitted is formed in the vertical portion (131 in Fig.

At this time, the engaging groove (not shown) is formed in the engaging groove 137 (see FIG. 2) in which the engaging end 240 is hooked.

2) by fitting the third portion 230 of the panel fin 200 into the coupling groove (137 of FIG. 2) of the support main (130 of FIG. 2) 2) of the support main (130 in Fig. 2) so as to cover a part of the upper surface of the edge of the liquid crystal panel (110 in Fig. 2) Thereby preventing detachment of the liquid crystal panel (110 in Fig. 2).

The length H1 of the first portion 210 is longer than the length H1 of the support main portion 130 in FIG. 2 And the length H2 of the third portion 230 is formed to be shorter than the width of the vertical portion (131 in FIG. 2) of the support main (130 in FIG. 2) .

That is, the length H1 of the first portion 210 is about 1.5 times longer than the width of the vertical portion (131 in FIG. 2) of the support main (130 in FIG. 2) It is preferable that the length H2 is a length less than 1/2 of the width of the vertical portion (131 in Fig. 2) of the support main (130 in Fig. 2).

The panel pin 200 may be made of a metal material, or may be made of the same plastic material as the support main (130 of FIG. 2).

Here, since the engaging end 240 is formed in a tapered shape, the process of inserting the engaging end 240 into the coupling groove (137 in FIG. 2) of the support main body 130 (FIG. 2) .

At this time, the first portion 210 of the panel pin 200 may have various shapes as shown in FIGS. 4A to 4C.

That is, as shown in FIG. 4A, the width of the first portion 210 of the panel pin 200 may be reduced toward the center of the display region, or may be curved as shown in FIG. 4B.

In addition, as shown in FIG. 4C, the first portion 210 may be configured to be opened.

Fig. 5 is a cross-sectional view schematically showing a partial cross section of the modular Fig. 2, and Fig. 6 is an enlarged cross-sectional view of a portion of Fig.

The optical sheets 121 are stacked on the reflective plate 125, the light guide plate 123, the LED assembly 129 provided on one side of the light guide plate 123 and the light guide plate 123, 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 is disposed on the backlight unit 120 and the first and second substrates 112, and 114 are attached with polarizing plates 119a and 119b selectively transmitting only specific light.

The backlight unit 120 and the liquid crystal panel 110 are surrounded by the support main body 130 and a cover bottom 150 formed of a horizontal surface 151 and a side surface 153 is coupled to the back surface of the backlight unit 120 and the liquid crystal panel 110.

A first portion 210 covering a part of the upper surface of the liquid crystal panel 110, a second portion 220 perpendicular to the first portion 210 and a second portion 220 perpendicular to the second portion 220, And a third portion 230 that faces horizontally with respect to the support main body 130. The panel main body 130 includes a plurality of panel pins 200,

At this time, the support main body 130 is vertically protruded to the inside of the vertical part 131 and the vertical part 131 having a rectangular shape having a certain thickness covering the edges of the liquid crystal panel 110 and the backlight unit 120, And a protrusion 133 separating the positions of the liquid crystal panel 110 and the backlight unit 120 from each other.

Accordingly, the liquid crystal panel 110 is supported on the protrusion 133 and the liquid crystal panel 110 and the backlight unit 120 are surrounded by the vertical portion 131.

The vertical part 131 of the support main 130 protrudes upward from the liquid crystal panel 110 to prevent horizontal flow of the liquid crystal panel 110 which is seated on the protrusion 133.

Accordingly, the liquid crystal panel 110 is prevented from horizontally flowing by the vertical part 131 of the support main body 130 to prevent the flow in the -X and + X axis directions defined in the drawing, 110 are prevented from flowing in the -Y-axis direction defined by the drawing by the projection 133 of the support main body 130.

The vertical portion 131 protruding higher than the liquid crystal panel 110 is formed with a through hole 135 through which the first portion 210 of the panel fin 200 is inserted, A coupling groove 137 into which the third portion 230 of the panel pin 200 is fitted is formed.

The first part 210 and the third part 230 of the panel pin 200 are inserted into the through hole of the support main body 130 after the liquid crystal panel 110 is mounted on the projecting part 133 of the support main body 130, (135) and the coupling groove (137), and then pressure is applied to each other to engage each other.

At this time, the size of the through-hole 135 is configured to have a size such that the outer surface of the first portion 210 of the panel fin 200 can be inserted while abutting, 230 are tightly inserted.

That is, the engaging groove 137 is formed to be about 1.1 to 1.2 times larger than the outer diameter of the engaging end 240 of the third portion 230. In the process of passing the engaging end 240 through the engaging groove 137 And is inserted into the coupling groove 137 closely.

At this time, a latching protrusion 139 is provided on the inside of the coupling groove 137. The latching end 240 provided at the end of the third portion 230 of the panel pin 200 tightens the coupling groove 137 And then is caught by the engaging jaw 139 of the engaging groove 137.

The third portion 230 of the panel pin 200 is assembled with the coupling groove 137 of the support main 130 to fix the position of the panel pin 200 and to fix the position of the panel pin 200, The main body 130 is assembled and assembled.

Since the first portion 210 of the panel fin 200 has a length H1 of about 1.5 times or more the width h of the vertical portion 131 of the support main 130, The first portion 210 passes through the through hole 135 of the support main body 130 to support the top edge of the liquid crystal panel 110.

The top edge of the liquid crystal panel 110 supported by the first part 210 is a non-display area, and the entire display area of the liquid crystal panel 110 is opened to display an image realized by the liquid crystal panel 110 .

Accordingly, the panel pin 200 is completely blocked by the flow in the X-axis direction and the Y-axis direction defined in the drawing, and the liquid crystal panel 110 is also moved in the + Y-axis direction through the panel pin 200 And prevents detachment of the liquid crystal panel 110 in the + Y axis direction.

That is, the liquid crystal panel 110 is formed of the first portion 210 of the panel pin 200, the vertical portion 131 of the support main 130, and the protruding portion 133, Y and + Y axis directions of the liquid crystal panel 110 can be prevented so that the liquid crystal panel 110 can be prevented from being floated or lifted due to an external impact in a state where the liquid crystal panel 110 is mounted on the protrusion 133 of the support main body 130 do.

Accordingly, the panel pin 200 of the present invention supersedes the inherent role of the existing top cover (40 of FIG. 1).

Accordingly, the top cover (40 in FIG. 1) can be eliminated, and the liquid crystal display module can be thinned by eliminating the top cover (40 in FIG. 1), simplifying the process and easily reassembling do.

Further, the elimination of the top cover (40 in Fig. 1) can reduce the process cost.

The number of the panel pins 200 is not limited as long as at least two edges of the panel pins 200 are provided on the edge of the liquid crystal panel 110 in order to strengthen the bonding force of the modular liquid crystal display device. Accordingly, the number and position of the panel pins 200 can be interlocked.

As described above, the liquid crystal display of the present invention includes a plurality of panel pins 200 assembled together with the support main body 130 along the edge of the liquid crystal panel 110 and supporting a part of the upper surface of the liquid crystal panel 110 The liquid crystal display module can be thinned by eliminating the conventional top cover (40 in FIG. 1), simplifying the process and facilitating reassembly.

Further, by eliminating the top cover (40 in Fig. 1), the process cost can be reduced.

In the above description, the backlight unit 120 is generally referred to as a side light type. A plurality of LEDs 129a may be arranged in a plurality of layers on the PCB 129b, It is also possible that the light guide plate 123 is located on both sides of the light guide plate 123 facing each other.

In the above description, the sidelight method is exemplified as a liquid crystal display device in which a plurality of panel pins 200 according to the present invention can be utilized for the sake of convenience. However, the sidelight method can be applied to the direct-type method. In this case, A plurality of LED assemblies 129 may be formed on the reflector 125 in a state of being removed.

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.

110: liquid crystal panel (112: first substrate, 114: second substrate)
119a and 119b: first and second polarizing plates
121: optical sheet, 123: light guide plate, 125: reflector,
129: LED assembly (129a: LED, 129b: PCB)
(130), a support main (131), a vertical part (133), a projecting part (135), a through hole (137)
150: cover bottom (151: horizontal plane, 153: side)
(200) comprising: a panel pin (210) having a first portion (220), a second portion (230), a third portion (240)

Claims (12)

Cover cover and;
A backlight unit mounted on the cover bottom;
A liquid crystal panel mounted on the backlight unit;
A support main body which is assembled with the cover bottom and is formed as a vertical part and surrounds the edge of the backlight unit and the liquid crystal panel;
A plurality of panel pins for supporting a part of a top surface of the liquid crystal panel,
Wherein each of the plurality of panel pins comprises a first portion and a second portion perpendicular to the first portion and a third portion perpendicular to the second portion and parallel to the first portion and facing each other,
Wherein the vertical portion corresponds to each of the plurality of panel pins and has a through hole through which the first portion is inserted and an engagement groove that is assembled with the third portion,
Wherein the vertical portion is protruded upwardly higher than the liquid crystal panel and the through hole is provided in a region protruding upwardly higher than the liquid crystal panel.
The method according to claim 1,
Wherein at least two of the plurality of panel pins are spaced apart from each other by a predetermined distance along one edge of the liquid crystal panel.
delete The method according to claim 1,
Wherein the first portion is longer than the width of the vertical portion to support a part of the edge of the liquid crystal panel through the first portion.
The method according to claim 1,
And a locking step is provided at an end of the third part, and the coupling groove is provided with a locking step corresponding to the locking step.
6. The method of claim 5,
Wherein the engaging end is bent in a direction perpendicular to the first portion at an end of the third portion and is tapered toward an end of the third portion.
The method according to claim 6,
Wherein the engaging groove corresponds to the length of the third portion and the size of the engaging groove is 1.1 to 1.2 times larger than the outer diameter of the engaging end, And the outer surface is in close contact with the inner surface of the coupling groove.
8. The method of claim 7,
And the third portion is formed to have a length less than 1/2 of the width of the vertical portion.
The method according to claim 1,
Wherein the panel pin is made of a metal material or a mold material made of a plastic material.
The method according to claim 1,
Wherein the support main comprises a protruding portion inside the vertical portion, and the liquid crystal panel is seated on the protruding portion.
The method according to claim 1,
Wherein the backlight unit comprises a reflection plate, a light guide plate positioned on the reflection plate, a plurality of optical sheets interposed on the light guide plate, and a light source disposed on one side of the light guide plate.
The method according to claim 1,
Wherein the backlight unit comprises a reflection plate, a plurality of light sources arranged on the reflection plate in parallel, and a plurality of optical sheets interposed on the light source.

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