KR20130013041A - Liquid crystal display device - Google Patents

Abstract

PURPOSE: An LCD(Liquid Crystal Display) device is provided to effectively fix an liquid crystal panel within the LCD device by attaching a support main or a cover bottom by using liquid adhesive. CONSTITUTION: A liquid crystal panel(110) is located on a backlight unit. A side of the liquid crystal panel and the back light unit are wrapped with a first module(150). Liquid adhesive(200) is sprayed between the side of the first module and the side of the liquid crystal panel. The side of the liquid crystal panel is attached to the first module.

Description

[0001] Liquid crystal display device [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device having a light weight, a thin shape, and a narrow bezel.

Liquid crystal display devices (LCDs), which are used for TVs and monitors due to their high contrast ratio and are advantageous for displaying moving images, are characterized by optical anisotropy and polarization of liquid crystals. The principle of image implementation by

Such a liquid crystal display is an essential component of a liquid crystal panel bonded through a liquid crystal layer between two side-by-side substrates, and realizes a difference in transmittance by changing an arrangement direction of liquid crystal molecules with an electric field in the liquid crystal panel. do.

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

The liquid crystal panel and the backlight have a top frame covering the top edge of the liquid crystal panel and a cover bottom covering the back surface of the backlight while the edges are surrounded by the support frame having a rectangular frame shape.

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.

Accordingly, by removing the top cover to reduce the components constituting the liquid crystal display device, the movement to provide a lightweight and thin liquid crystal display device is actively progressing.

In addition, in recent years, liquid crystal displays have been required for narrow bezels in which the display area is wider and the bezel area, which is a non-display area other than the display area, is formed as small as possible.

However, in the liquid crystal display device in which the top cover is removed, a portion of the rear surface of the liquid crystal panel is attached and fixed to the support main or / and the cover bottom through an adhesive tape such as a double-sided tape. It also acts as a shading tape to shield light from leaking into the portion.

Here, the width of the adhesive tape has a processing limit of 1.0 mm, and the liquid crystal display device for attaching and fixing the liquid crystal panel through the adhesive tape is difficult to implement a narrow bezel of 1 mm or less.

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

Another object of the present invention is to fix the liquid crystal panel more effectively in the liquid crystal display.

In order to achieve the object as described above, the present invention is a backlight unit; A liquid crystal panel positioned above the backlight unit; A first module covering side surfaces of the backlight unit and the liquid crystal panel; A liquid adhesive is applied between a side surface of the liquid crystal panel and a side surface of the first module, and the side surface of the liquid crystal panel provides a liquid crystal display device attached and fixed to the first module.

At this time, the liquid adhesive is applied in a liquid state, and then cured, the liquid adhesive is made of one selected from polyester-based, instant adhesive, thermal adhesive, solvent-type adhesive, glue (glue) liquid.

In addition, the polyester-based cyanoacrylate resin (cyanoacrylate resin), epoxy resin (epoxy resin), polyolefin (polyolefine), polymethyl methacrylate (poly (methyl methacrylate): PMMA), polyacrylate (polyacrylate) And, polyacrylic acid (polyacrylic acid), polyurethane (polyurethane), polyethylene terephthalate (polyethylene terephthalate (PET)) and the like, the instant adhesive comprises a silicone resin, the liquid adhesive is the upper edge of the liquid crystal panel and the Cover the upper side of the first module.

In addition, the first module may include a second module including a horizontal surface and a side surface covering the rear surface of the backlight unit, and a horizontal surface and a side surface covering the rear surface of the backlight unit.

As described above, in the light weight and thin liquid crystal display device in which the top cover is removed according to the present invention, the liquid crystal panel is attached to and fixed to the support main or / and the cover bottom through the liquid adhesive. There is an effect that can be more effectively fixed in the display device, there is an effect that can implement a liquid crystal display of the narrow bezel.

1 is an exploded perspective view of a liquid crystal display device according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a partial cross section of FIG. 1 modularized. FIG.
3 is a schematic cross-sectional view of a partial cross section of a modular liquid crystal display device with the top cover and the support main removed.
4 is a schematic cross-sectional view of a partial cross section of a modular liquid crystal display device having a top cover and a cover bottom removed.

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 according to an exemplary embodiment of the present invention.

As illustrated, the liquid crystal display device includes a liquid crystal panel 110 and a backlight unit 120, and includes a support main 130 and a cover bottom 150 for modularizing the liquid crystal panel 110 and the backlight unit 120. It includes.

Looking at each of them in more detail, the liquid crystal panel 110 plays a key role in image expression, and the first substrate 112 and the second substrate 114 bonded to each other with the liquid crystal layer interposed therebetween. Include.

In this case, although not shown in the drawing, a plurality of gate lines and data lines intersect each other and a pixel is defined on an inner surface of the first substrate 112, which is commonly referred to as a lower substrate or an array substrate, and a thin film transistor is formed at each intersection point. (thin film transistor: TFT) is provided and is connected one-to-one 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.

In addition, polarizing plates (not shown) for selectively transmitting only specific light are attached to the outer surfaces of the first and second substrates 112 and 114, respectively.

Along the at least one edge of the liquid crystal panel 110, the printed circuit board 117 is connected through a connecting member 116, such as a flexible circuit board or a tape carrier package (TCP), in the modularization process. The side surface of the support main 130 or the cover bottom 150 is properly folded to be in close contact.

When the thin film transistor selected for each gate line is turned on by the on / off signal of the gate driver circuit, the liquid crystal panel 110 transmits the signal voltage of the data driver 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, indicating a difference in transmittance.

In addition, the liquid crystal display according to the present invention is provided with a backlight unit 120 for supplying light to the back of the liquid crystal panel 110, so that the difference in transmittance represented by the liquid crystal panel 110 is expressed to the outside.

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

The LED assembly 129 is positioned at one side of the light guide plate 123 to face the light incident surface of the light guide plate 123, and the plurality of LEDs 129a and the plurality of LEDs 129a are mounted at a predetermined interval apart from each other. ).

At this time, the plurality of LEDs 129a include LED chips (not shown) which emit all of the colors of RGB or emit white, and emit white light toward the light incident surface of the light guide plate 123. In addition, the plurality of LEDs 129a emit light having a color of red (R), green (G), and blue (B), respectively, and by lighting the plurality of RGB LEDs (129a) at once, white light by color mixing is generated. It can also be implemented.

In addition to the LED assembly 129, a fluorescent lamp such as a cathode cathode fluorescent lamp or an external electrode fluorescent lamp may be used.

The light guide plate 123 to which light emitted from the plurality of LEDs 129a of the LED assembly 129 is incident is performed by the light guide plate 123 while the light incident from the LED 129a travels inside the light guide plate 123 by a plurality of total reflections. Spread evenly over a wide area of to provide 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 configured in various ways, such as an elliptical pattern, a polygon pattern, a hologram pattern, and the like to guide the light incident into the light guide plate 123. The pattern is formed on the lower surface of the light guide plate 123 by a printing method or an injection method.

The 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. The cover bottom has a horizontal surface 151 and an edge thereof closely contacting the rear surface of the backlight unit 120. It consists of a side 153 vertically bent upwards.

The cover bottom 150 is mounted with the liquid crystal panel 110 and the backlight unit 120, and the cover bottom 150 is the basis for assembling the entire apparatus of the LCD.

The support main 130 having a rectangular frame shape seated on the cover bottom 150 and surrounding the edges of the liquid crystal panel 110 and the backlight unit 120 is coupled to the cover bottom 150.

Here, the support main 130 includes a vertical portion 131 which surrounds the edge of the liquid crystal panel 110 and the backlight unit 120.

The liquid crystal display according to the exemplary embodiment of the present invention has a structure in which the top cover (not shown) is removed, and thus the liquid crystal display may be light and thin by removing the top cover (not shown), and the process may be simplified. Has an effect.

In addition, due to the removal of the top cover (not shown) made of a metal material, it is possible to reduce the process cost.

At this time, the liquid crystal panel 110 is characterized by attaching and fixing the liquid crystal panel 110 to the support main 130 and the cover bottom 150 by applying a liquid adhesive (200, see Fig. 2) on the edge.

Accordingly, the liquid crystal panel 110 and the backlight unit 120 may be modularized, and the liquid crystal panel 110 may be more effectively fixed in the liquid crystal display, and a narrow bezel liquid crystal display may be provided. We will discuss this in more detail later.

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

Here, the backlight unit 120 having the above-described structure is generally called a side light method, and according to the purpose, a plurality of LEDs 129a may be arranged on the PCB 129b.

FIG. 2 is a schematic cross-sectional view of some cross-section of FIG. 1 modularized.

As illustrated, the optical sheet 121 is stacked on the reflective plate 125, the light guide plate 123, the LED assembly (129 of FIG. 1) and the light guide plate 123 to form a backlight unit (120 of FIG. 1). do.

In addition, the liquid crystal panel 110 having a liquid crystal layer (not shown) interposed therebetween is disposed between the backlight unit 120 and the first and second substrates 112 and 114 therebetween. On each of the outer surfaces of the two substrates 112 and 114, polarizing plates 119a and 119b for selectively transmitting only specific light are attached.

The backlight unit (120 of FIG. 1) and the liquid crystal panel 110 are surrounded by edges of the vertical part 131 of the support main 130, and cover cover consisting of a horizontal surface 151 and a side surface 153 on the rear surface thereof. 150 is coupled to the support main 130.

At this time, the liquid crystal panel 110 is attached to the support main 130 and the cover bottom 150 through the liquid adhesive 200, the position is fixed, that is, the liquid adhesive 200 is the support main 130 The upper edge of the liquid crystal panel 110 whose edge is surrounded by the vertical portion 131 of the liquid crystal panel 110, the side surface of the liquid crystal panel 110, and the vertical portion 131 of the support main 130 and the side surface 153 of the cover bottom 150. The liquid crystal panel 110 is attached and fixed to the support main 130 and the cover bottom 150 through the liquid adhesive 200.

In this case, the liquid adhesive 200 is applied to the upper portion of the vertical portion 131 of the support main 130 and the upper side of the side 153 of the cover bottom 150 to further improve the fixing force of the liquid crystal panel 110. desirable.

Here, the liquid adhesive 200 may be applied in a liquid or viscous state, for example, cyanoacrylate resin (cyanoacrylate resin), epoxy resin (polyoxy resin), polyolefin (polyolefine), polymethyl methacrylate (poly (methyl methacrylate): PMMA), polyacrylate, polyacrylic acid, polyurethane, polyurethane, such as polyester terephthalate (polyester terephthalate (PET), such as polyester, silicone resin Various polymer adhesive resins, such as adhesives, thermal adhesives, solvent adhesives, and derivative polymer resins thereof, may be used, such as one or more blends, and photocurable resins.

In the case of the photocurable resin, it may include monomers that can be cured by ultraviolet rays, a photoinitiator, a photo-enhancing agent and, if necessary, a solvent, and may be made of a glue liquid.

The liquid adhesive 200 is applied in a liquid or viscous state, and has a property of curing under a certain time or a certain temperature.

Therefore, the liquid crystal panel 110 and the backlight unit (120 of FIG. 1) are modularized through the cover bottom 150 and the support main 130, and the upper edges of the liquid crystal panel 110 and the liquid crystal panel 110 are formed. The liquid crystal panel 110 is supported by applying a liquid liquid adhesive 200 between the side surface and the vertical portion 131 of the support main 130 or the side surface 153 of the cover bottom 150 and curing it. Attached to and fixed to the 130 and the cover bottom 150. Therefore, the position of the liquid crystal panel 110 is fixed in the liquid crystal display device.

At this time, since the liquid adhesive 200 is applied to the upper edge and side of the liquid crystal panel 110, even if the area where the liquid adhesive 200 is applied has a very thin width (D), the position of the liquid crystal panel 110 is fixed. You can.

That is, the width B of the non-display area of the modular liquid crystal display device may be about 0.8 mm or less, and the liquid adhesive 200 may be coated in the non-display area, so that the liquid crystal panel 110 may be applied to the liquid adhesive 200. In the liquid crystal display according to the exemplary embodiment of the present invention, the width of the bezel region may be designed to be 1.0 mm or less.

This can implement a narrow bezel as compared with the conventional attaching and fixing a part of the rear surface of the liquid crystal panel 110 through an adhesive tape (not shown).

That is, the existing adhesive tape (not shown) is not possible to design a width of 1.0mm or less due to the processing limitation, because the position of the liquid crystal panel 110 must be fixed only through a part of the rear surface of the liquid crystal panel 110. For fixing the liquid crystal panel 110, the width of the adhesive tape (not shown) had to be designed to about 1.5 mm or more.

Therefore, since the width of the adhesive tape (not shown) is about 1.5 mm or more, the width of the non-display area of the liquid crystal panel 110 is 1.5 to 1.8 mm or more so that light does not leak to portions outside the display area of the liquid crystal panel 110. In the end, since the bezel area of the liquid crystal display device should be designed to be 2.0 to 2.3 mm or more, it was very difficult to implement a narrow bezel.

In particular, even if the fixing force of the liquid crystal panel 110 is reduced, since the processing limit of the adhesive tape (not shown) is 1.0 mm or more, there is a limit to providing a liquid crystal display having a narrow bezel of 1.0 mm.

On the contrary, in the liquid crystal display according to the exemplary embodiment of the present invention, since the liquid adhesive 200 is applied to the upper edge and the side of the liquid crystal panel 110, even if the area where the liquid adhesive 200 is applied has a very thin width. The position of the liquid crystal panel 110 may be fixed.

Therefore, a separate area for attaching and fixing the liquid crystal panel 110, such as the width of a conventional adhesive tape (not shown), is not required, and the liquid adhesive 200 may be applied in the non-display area of the liquid crystal display device. As a result, a liquid crystal display having a narrow bezel of 1.0 mm or less may be implemented.

In addition, the liquid crystal display of the present invention does not reduce the fixing force of the liquid crystal panel 110 to implement a narrow bezel, and by fixing the upper edge and the side of the liquid crystal panel 110, more effectively than the conventional liquid crystal panel 110 may be fixed.

As described above, the liquid crystal display device of the present invention is a light and thin liquid crystal display device with a top cover (not shown), wherein the liquid crystal panel 110 through the liquid adhesive 200 to the support main 130 or By attaching and fixing to the cover bottom 150, the liquid crystal panel 110 may be more effectively fixed in the liquid crystal display, and a narrow bezel liquid crystal display may be provided.

FIG. 3 is a cross-sectional view schematically illustrating some cross-sections of the modular LCD including the top cover and the support main removed.

As illustrated, the optical sheet 121 is stacked on the reflective plate 125, the light guide plate 123, the LED assembly (129 of FIG. 1), and the light guide plate 123 to form a backlight unit (120 of FIG. 1). The liquid crystal panel 110, in which a liquid crystal layer (not shown) is interposed between the first and second substrates 112 and 114, is modularized by a cover bottom 150 formed of a horizontal surface 151 and a side surface 153.

Reference numerals 119a and 119b denote polarizers attached to the front and rear surfaces of the liquid crystal panel 110 to control polarization directions of light, respectively.

At this time, the edge of the liquid crystal panel 110 is attached to the cover bottom 150 through the liquid adhesive 200, the position is fixed. That is, the liquid adhesive 200 is applied between the upper edge of the liquid crystal panel 110, the side surface of the liquid crystal panel 110, and the side surface 153 of the cover bottom 150, and the liquid crystal panel 110 is the liquid adhesive 200. It is attached to and fixed to the cover bottom 150 through).

At this time, the liquid adhesive 200 is to be applied to the upper side of the side 153 of the cover bottom 150, it is preferable to further improve the fixing force of the liquid crystal panel 110.

Here, the liquid adhesive 200 may be coated in the non-display area of the liquid crystal display, thereby implementing a liquid crystal display having a narrow bezel of 1.0 mm or less.

As described above, the liquid crystal display device of the present invention is a lightweight and thin liquid crystal display device in which the top cover (not shown) and the support main (130 of FIG. 2) are removed, and the liquid crystal panel 110 may be formed of the liquid adhesive 200. By attaching and fixing to the cover bottom 150 through), it is possible to more effectively secure the liquid crystal panel 110 in the liquid crystal display device and at the same time can provide a narrow bezel liquid crystal display device.

FIG. 4 is a cross-sectional view schematically illustrating some cross-sections of the modular LCD including the top cover and the cover bottom removed.

As illustrated, the optical sheet 121 is stacked on the reflective plate 125, the light guide plate 123, the LED assembly (129 of FIG. 1), and the light guide plate 123 to form a backlight unit (120 of FIG. 1). The liquid crystal panel 110, in which a liquid crystal layer (not shown) is interposed between the first and second substrates 112 and 114, is modularized by the support main 130.

Reference numerals 119a and 119b denote polarizers attached to the front and rear surfaces of the liquid crystal panel 110 to control polarization directions of light, respectively.

In this case, the support main 130 includes a vertical portion 131 covering the edge of the backlight unit (120 of FIG. 1) except for the reflecting plate 125, and the reflecting plate 200 includes the vertical portion 131 of the support main 130. ) Is attached through an adhesive material 133 such as a double-sided tape to the back of the.

In this case, the liquid crystal panel 110 has its edge attached to the support main 130 through the liquid adhesive 200 and its position is fixed. That is, the liquid adhesive 200 has an upper edge and a liquid crystal panel of the liquid crystal panel 110. It is applied between the side of the 110 and the vertical portion 131 of the support main 130, the liquid crystal panel 110 is attached and fixed to the support main 130 through the liquid adhesive 200.

At this time, the liquid adhesive 200 is to be applied to the upper portion of the vertical portion 131 of the support main 130, it is preferable to further improve the fixing force of the liquid crystal panel 110.

Here, the liquid adhesive 200 may be coated in the non-display area of the liquid crystal display, thereby implementing a liquid crystal display having a narrow bezel of 1.0 mm or less.

As described above, the liquid crystal display device of the present invention is a light and thin liquid crystal display device in which the top cover (not shown) and the cover bottom (150 of FIG. 3) are removed, and the liquid crystal panel 200 may be formed of the liquid adhesive 200. By attaching and fixing to the support main 130 through), it is possible to more effectively fix the liquid crystal panel 110 in the liquid crystal display device and at the same time can provide a narrow bezel liquid crystal display device.

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

110: liquid crystal panel (112, 114: first and second substrates)
119a and 119b:
121: optical sheet, 123: light guide plate, 125: reflector plate
130: support main (131: vertical)
150: cover bottom (151: horizontal plane, 153: side)
200: liquid adhesive

Claims (7)

A backlight unit;
A liquid crystal panel positioned above the backlight unit;
A first module covering side surfaces of the backlight unit and the liquid crystal panel;
Liquid adhesive applied between the side of the liquid crystal panel and the side of the first module
And a side surface of the liquid crystal panel attached and fixed to the first module.
The method of claim 1,
And the liquid adhesive is applied in a liquid state and then cured.
The method of claim 2,
The liquid adhesive is a liquid crystal display device comprising one selected from the group consisting of polyester, instant adhesive, thermal adhesive, solvent-based adhesive, glue liquid.
The method of claim 3, wherein
The polyester-based cyanoacrylate resin (cyanoacrylate resin), epoxy resin (epoxy resin), polyolefin (polyolefine), polymethyl methacrylate (poly (methyl methacrylate): PMMA), polyacrylate (polyacrylate), poly Acrylic acid (polyacrylic acid), polyurethane (polyurethane), polyethylene terephthalate (polyethylene terephthalate, PET) and the like, the instant adhesive is a liquid crystal display device comprising a silicone resin.
The method of claim 1,
And the liquid adhesive covers an upper edge of the liquid crystal panel and an upper portion of the side surface of the first module.
The method of claim 1,
The first module includes a horizontal surface and the side surface covering the rear surface of the backlight unit.
The method of claim 1,
And a second module including a horizontal surface and a side surface covering a rear surface of the backlight unit.

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