KR20110052071A - Liquid crystal display device - Google Patents

Abstract

PURPOSE: An LCD(Liquid Crystal Display) device is provided to reduce a Bezel and be produced in thin thickness by efficiently fixing optical sheets. CONSTITUTION: An LCD(Liquid Crystal Display) device comprises a light source unit(510); plural optical sheets placed on the light source unit; and a liquid crystal panel(530) placed on the plural optical sheets. The plural optical sheets includes first and second regions which respectively correspond to a non-display region(N) and a display region(P) of the liquid crystal panel, and a first adhesive layer(540) is placed between the first regions on the plural optical sheets.

Description

[0001] The present invention relates to a liquid crystal display device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and to a liquid crystal display device capable of reducing a bezel area and implementing a thin liquid crystal display device.

A non-light emitting display device such as a liquid crystal display device includes a liquid crystal panel and a backlight unit. The liquid crystal panel includes a liquid crystal layer, a thin film transistor (TFT) substrate and a color filter substrate facing each other with the liquid crystal layer interposed therebetween, and displays an image using light provided from the backlight unit.

The backlight unit for supplying light includes at least one light source and a functional optical sheet for supplying light emitted from the light source to the liquid crystal panel.

Functional optical sheets include brightness enhancement sheets, prism sheets, and diffusion sheets, such as Dual Brightness Enhancement Film (DBEF) or Brightness Enhancement Film (BEF).

The functional optical sheets described above are mainly fixed to each other by a fixing structure by a double-sided tape, a fixing structure by a mechanical structure such as a boss, or a fixing structure by an adhesive layer. The liquid crystal panel or the diffusion plate (or the light guide plate) is also fixed by the fixing structure.

Here, the fixing structure by the double-sided tape forms a tab on a part of the optical sheet, positions the double-sided tape on the tab, fixes the two optical sheets using the double-sided tape, and uses the tab of the optical sheet as a light source. And a structure fixed to a recess of a support member for supporting a diffusion plate or the like.

And the fixing structure by the boss refers to a structure for fixing the optical sheet by forming a hole in the tab of the optical sheet, forming a boss in the support member to couple the hole to the boss.

And the fixing structure by an adhesive layer means the structure which apply | coats an adhesive agent over the whole one surface of an optical sheet, and adhere | attaches another optical sheet using the apply | coated adhesive agent, and fixes two optical sheets.

By the way, the fixing structure by the double-sided tape has a problem that there is a limit in reducing the size of the bezel (vessel) because it must form a tab for bonding the double-sided tape.

In addition, the fixing structure by the boss has a problem that a tolerance occurs in the hole as time passes, and the optical sheets flow, thereby causing a gap between sheets.

In addition, the fixing structure by the adhesive layer has a problem in that warpage occurs due to problems such as differences in coefficients of thermal expansion between sheets.

As such, the conventional fixing structures do not effectively fix the optical sheets.

Accordingly, the present invention provides a liquid crystal display device in which optical sheets are effectively fixed to reduce bezels and realize thinness.

In order to achieve the above object, a liquid crystal display according to an embodiment of the present invention is a light source unit including at least one light source, a plurality of optical sheets positioned on the light source unit and a liquid crystal positioned on the plurality of optical sheets A plurality of optical sheets including first panels and second regions respectively corresponding to non-display regions and display regions of the liquid crystal panel, wherein the plurality of optical sheets are formed between the first regions of the plurality of optical sheets. 1 The adhesive layer may be located.

The plurality of optical sheets may include a first sheet, a second sheet positioned on the first sheet, and a third sheet positioned on the second sheet.

Each of the first to third sheets may include an entrance surface on which light of the light source is incident and an emission surface on which light of the light source exits.

The first region may be an edge of the first to third sheets, respectively, and the second region may be a central portion except for the edge.

The first adhesive layer may be positioned between the emission surface of the first sheet and the entrance surface of the second sheet, and between the emission surface of the second sheet and the entrance surface of the third sheet, respectively.

The display device may further include a second adhesive layer positioned between the non-display area of the liquid crystal panel and the first area of the third sheet.

The display device may further include a glass substrate on the liquid crystal panel, and may further include a third adhesive layer disposed between the non-display area of the liquid crystal panel and the glass substrate corresponding to the non-display area of the liquid crystal panel.

The optical sheet may further include a fourth adhesive layer positioned between the optical sheet and the light source unit corresponding to the first region of the optical sheet.

The display device may further include a diffusion plate positioned between the optical sheet and the light source unit, and further include a fifth adhesive layer positioned between the optical sheet and the diffusion plate corresponding to the first region of the optical sheet.

The first to fifth adhesive layers may be located on at least one side of four sides constituting the first sheet.

The second region may include a plurality of holes, and the first adhesive layer may pass through the plurality of holes.

The first region may be an edge of the first sheet and may be side surfaces of the second sheet and the third sheet.

The first adhesive layer may be positioned at edges of the first sheet, side surfaces of the second sheet and the third sheet.

The first adhesive layer may contact the non-display area of the liquid crystal panel.

A glass substrate may be further disposed on the liquid crystal panel, and the first adhesive layer may be positioned between the non-display area of the liquid crystal panel and the glass substrate corresponding to the non-display area of the liquid crystal panel.

The optical sheet may further include a fourth adhesive layer positioned between the optical sheet and the light source unit corresponding to the first region of the optical sheet.

The display device may further include a diffusion plate positioned between the optical sheet and the light source unit, and further include a fifth adhesive layer positioned between the optical sheet and the diffusion plate corresponding to the first region of the optical sheet.

The first to fifth adhesive layers may be located on at least one side of four sides constituting the first sheet.

The light source unit may include a first layer on which the light source is mounted and a second layer on the first layer and covering the light source.

It may further include a reflective layer formed between the first layer and the second layer.

In the liquid crystal display of the present invention, the adhesive layer for fixing the optical sheet is located in the first area corresponding to the non-display area of the liquid crystal panel. Therefore, the tabs protruding from the sides of the sheet can be removed in the fixing structure by the double-sided tape or the boss, so that the size of the bezel can be reduced.

In addition, since at least one of the optical sheet, the liquid crystal panel, the glass substrate, the light source unit, and the diffusion plate has an integrated structure due to the adhesive layer, a frame for fixing such components is conventionally removed, thereby providing a thin liquid crystal display device. can do.

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

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

Referring to FIG. 1, the liquid crystal display device includes a display module 100, a front cover 200 and a back cover 300 surrounding the display module 100, and a display module 100 with the front cover 200 and / or A fixing member 400 fixed to the back cover 300 may be included.

The front cover 200 may include a front panel (not shown) made of a transparent material that transmits light, and the front panel is disposed at the front of the display module 100 at regular intervals to prevent the display module 100 from external impact. Protect.

The fixing member 400 is fixed to one side of the front cover 200 by a fastening member (not shown) such as a screw, and then the other side supports the display module 100 with respect to the front cover 200 side. The display module 100 may be fixed to the cover 200. Of course, the display module 100 may be directly fixed to the front cover 200 or the back cover 300 by the fastening member.

FIG. 2 is a cross-sectional view illustrating a brief configuration of the display module illustrated in FIG. 1.

Referring to FIG. 2, the display module 100 included in the liquid crystal display device may include a liquid crystal panel 120 and a backlight unit 140.

The liquid crystal panel 120 includes a color filter substrate 122 and a TFT substrate 124 bonded to maintain a uniform cell gap, and a liquid crystal layer (not shown) is filled between the two substrates 122 and 124. .

The liquid crystal layer is composed of a plurality of liquid crystal molecules, and the liquid crystal molecules are changed in accordance with the voltage difference generated between the pixel electrode and the common electrode provided in the TFT substrate 124. Therefore, the light provided from the backlight unit 140 is incident on the color filter substrate 122 in response to the change in the molecular arrangement of the liquid crystal layer.

An upper polarizer 126 and a lower polarizer 128 may be disposed above and below the liquid crystal panel 120, respectively. The liquid crystal panel 120 may include a gate and a data driver (not shown) for generating a driving signal for driving the panel 120.

The structure and configuration of the liquid crystal panel 120 is merely an example, and the embodiments may be changed, added, or deleted within the scope of the spirit of the present invention.

As shown in FIG. 2, the display module 100 is configured by closely placing the backlight unit 140 on the liquid crystal panel 120.

For example, the backlight unit 140 may be fixed to the lower surface of the liquid crystal panel 120, more specifically, to the lower polarizer 128.

By attaching the backlight unit 140 to the liquid crystal panel 120 as described above, the overall thickness of the liquid crystal display device may be reduced to improve appearance, and the structure for fixing the backlight unit 140 may be removed to remove the structure. Can simplify the structure and manufacturing process.

The liquid crystal panel 120 may be divided into a plurality of regions, and the brightness of light emitted from the region of the backlight unit 140 corresponding to the gray peak value or the color coordinate signal of each of the divided regions, that is, the The brightness of the liquid crystal panel 120 may be controlled by adjusting the brightness.

To this end, the backlight unit 140 may be operated by being divided into a plurality of divided driving regions corresponding to each of the divided regions of the liquid crystal panel 120.

3 is a cross-sectional view showing the configuration of the backlight unit of the present invention. Referring to FIG. 3, the backlight unit 140 may include a light source unit 150 and an optical sheet 160 for supplying light emitted from the light source unit 150 to the liquid crystal panel 120.

The light source unit 150 may include a first layer 152, a plurality of light sources 154, a second layer 156, and a reflective layer 158. The plurality of light sources 154 are formed on the first layer 152, and the second layer 156 is disposed on the first layer 152 to cover the plurality of light sources 154.

The first layer 152 may be a substrate on which the plurality of light sources 154 are mounted, and the substrate may include an adapter (not shown) for supplying power and an electrode pattern (not shown) for connecting the light source 154. Can be formed.

For example, the first layer 152 may be a PCB (Printed Circuit Board) substrate formed using polyethylene terephthalate, glass, polycarbonate and silicon, and the light source 154 and the adapter are connected to an upper surface of the substrate. Carbon nanotube electrode patterns (not shown) may be formed.

The light source 154 may be one of a light emitting diode (LED) chip or a light emitting diode package having at least one light emitting diode chip. Hereinafter, a light emitting diode package is provided as the light source 154.

The light emitting diode package may be divided into a top view method and a side view method according to a direction in which the light emitting surface is directed, and the light source 154 of the present invention is a light emitting diode package of a top view method or a side view method. It may be configured using at least one of.

Although not specifically illustrated, the light source may include a light emitting device that emits light, a mold having a cavity, and a plurality of lead frames. The light emitting device may be the above-mentioned light emitting diode chip.

In addition, a semiconductor element such as a light receiving element and a protection element may be selectively mounted on the lead frame together with the light emitting diode chip inside the cavity. That is, not only the light emitting diode chip but also a protection element such as a zener diode for protecting the light emitting diode chip from static electricity or the like may be mounted on the lead frame.

The second layer 156 disposed above the first layer 152 and covering the plurality of light sources 154 transmits the light to uniformly provide the light emitted from the light source 154 to the liquid crystal panel 120. And spread at the same time.

The second layer 156 may be made of a light transmissive material, for example, silicone or acrylic resin. However, the second layer 156 is not limited to the above materials and may be formed of various resins.

In addition, in order for the light emitted from the light source 154 to be diffused so that the backlight unit 140 has a uniform brightness, the second layer 156 may be formed of a resin having a refractive index of about 1.4 to 1.6. For example, the second layer 156 may be formed of any one material selected from the group consisting of polyethylene terephthalate, polycarbonate, polypropylene, polyethylene, polystyrene and polyepoxy, silicone, acrylic, and the like.

The second layer 156 may include a polymer resin having a predetermined adhesiveness to firmly adhere to the light source 154 and the reflective layer 158. For example, the second layer 156 may comprise unsaturated polyester, methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, normal butyl methacrylate, normal butyl methyl methacrylate, acrylic acid, methacrylic acid, Hydroxy ethyl methacrylate, hydroxy propyl methacrylate, hydroxy ethyl acrylate, acrylamide, metyrol acrylamide, glycidyl methacrylate, ethyl acrylate, isobutyl acrylate, normal butyl acrylate, 2 -Acryl-based, urethane-based, epoxy-based, melamine-based, and the like, such as ethyl hexyl acrylate polymer or copolymer or terpolymer.

Meanwhile, the second layer 156 may be formed by applying a liquid or gel resin to the upper surface of the first layer 152 on which the plurality of light sources 154 and the reflective layer 158 are formed, and then curing the resin. It may be manufactured separately and adhered to the upper surface of the first layer 152.

As the thickness of the second layer 156 increases, the light emitted from the light source 154 may be spread more widely, but the amount of light absorbed by the second layer 156 may increase to decrease the luminance. Therefore, the thickness of the second layer 156 is preferably 0.1 to 4.5 nm so as to provide light of uniform brightness without greatly reducing the brightness of the light provided from the backlight unit 140 to the liquid crystal panel 120. .

Meanwhile, a plurality of diffusion particles 156a may be dispersed in the second layer 156. The diffusing particles 156a scatter or refract light incident on the second layer 156 so that the light emitted from the light source unit 150 is spread more widely. To this end, the diffusion particles 156a may be made of a material having a refractive index different from that of the material constituting the second layer 156.

The reflective layer 158 formed between the first layer 152 and the second layer 156, more specifically, on the top surface of the first layer 152, is formed by the second layer 156 of the light emitted from the light source 154. The light is diffused more widely by reflecting light totally reflected from the boundary.

The reflective layer 158 may be formed by dispersing a white pigment such as titanium oxide in a sheet of synthetic resin, laminating a metal deposition film on the surface, or dispersing bubbles in order to scatter light in a sheet of synthetic resin. In addition, silver (Ag) may be coated on the surface to increase the reflectance. Meanwhile, the reflective layer 158 may be formed by coating the upper surface of the first layer 152.

The reflective layer 158 may be formed with a pattern (not shown) for facilitating the light emitted from the light source 154 to proceed to the adjacent light source 154. The pattern may include a plurality of protrusions, and the density of the protrusions may increase farther from any one light source 154, that is, closer to an adjacent light source 154.

Accordingly, it is possible to prevent the luminance of light emitted upward from the region far from the light source 154, that is, the region close to the adjacent light source 154.

The plurality of light sources 154 may be arranged to emit light in different directions. That is, some of the light sources 154 may be configured as side view LED chips, and the other light sources 154 may be configured as top view LED chips.

In addition, some light sources may emit light in the left direction of FIG. 3, and others may emit light in the right direction of FIG. 3.

As such, by forming the light emission directions of the light sources in opposite directions, the phenomenon in which the luminance is concentrated or weakened in a specific region of the light source unit 154 may be reduced.

On the other hand, a large amount of light may be emitted in a region adjacent to the light source 154 by the strong scattering phenomenon near the light source 154 or the light emitted in a direction closer to the upper side from the light source 154.

In order to solve this problem, a light shielding pattern (not shown) is formed on the second layer 156 to reduce the luminance of light emitted from an area adjacent to the light source 154 to provide uniform luminance from the light source unit 150. Light can be emitted. The light shielding pattern may be composed of titanium dioxide.

The second layer 156 may be formed of first and second resin layers made of the same or different materials.

A support member (not shown) made of a metal having electrical conductivity, for example, a solder pad, may be provided to support and fix the light source 154 on the first layer 152. At this time, in order to reduce the occurrence of power loss due to the increase in resistance, the thickness of the support member may be formed to 0.14mm or less.

The reflective layer 158 may be formed to a thickness of 0.03 to 0.14 mm in order to improve the incident efficiency of light and to reflect most of the light incident from the light source 154.

The reflective layer 158 may be configured to have different reflectances according to the formed position. For example, the reflective layer 158 may be configured by alternately disposing a first reflective layer and a second reflective layer having different refractive indices.

In this case, the first reflective layer may be composed of a specular reflection sheet, and the second reflective layer may be composed of a diffuse reflection sheet.

On the other hand, in order to make the luminance of the light emitted from the light source unit 150 uniform, the first reflecting layer and the second reflecting layer may be formed in an appropriate range, and the second reflecting layer is configured such that the reflectance gradually increases or decreases according to the position. can do.

Hereinafter, a liquid crystal display having the above configuration will be described in more detail.

4A is a cross-sectional view of a liquid crystal display according to a first embodiment of the present invention. FIGS. 4B and 4C are plan views of the optical sheet of FIG. 4A, and FIG. 4D is a view showing region E of FIG. 4A and region F of FIG. 4C. to be.

4A and 4B, the LCD according to the first embodiment of the present invention includes a light source unit 510, a plurality of optical sheets 520 and a plurality of optical sheets positioned on the light source unit 510. It may include a liquid crystal panel 530 positioned on the 520.

The liquid crystal panel 530 may include a non-display area N and a display area P in which an image is not displayed. The plurality of optical sheets 520 respectively include a first area A and a second area B corresponding to the non-display area N and the display area P of the liquid crystal panel 530, respectively. The first adhesive layer 540 may be located between the first regions A of the optical sheet 520.

More specifically, the plurality of optical sheets 520 may include a first sheet 521, a second sheet 523 positioned on the first sheet 521, and a third sheet positioned on the second sheet 523. 525). The first sheet 521 includes an entrance surface 521a through which light is incident from the light source unit and an exit surface 521b through which light is emitted, and the second sheet 523 also has an entrance surface 523a and an exit surface 523b. The third sheet 525 may also include an incident surface 525a and an exit surface 525b.

The first adhesive layer 540 may be located in the first region A of the optical sheet 520, where the first region A may be an edge of the optical sheet 520, and the second region B may be It may be the center area except the edge. In addition, the first adhesive layer 540 is positioned between the exit surface 521b of the first sheet 521 and the entrance surface 523a of the second sheet 523, and the exit surface 523b of the second sheet 523. By being located between the incident surface 525a of the third sheet 525, the plurality of optical sheets 520 may have an integrated structure.

In particular, the first adhesive layer 540 includes at least one of four sides constituting the optical sheet 520 of the first region A of the optical sheet 520 corresponding to the non-display area N of the liquid crystal panel 530. It can be located on one side. More preferably, in order to increase the reliability of the adhesion, as shown in (a) of FIG. 4B, the first adhesive layer 540 may be located on all four sides of the optical sheet 520, and As shown in b), the first adhesive layer 540 may be located on two sides of the four sides of the optical sheet 520 facing each other.

Unlike this, referring to FIG. 4C, the first adhesive layer 540 may be formed in a dot shape. That is, as shown in (a) of FIG. 4C, the first adhesive layer 540 may be located on all four sides of the optical sheet 520, and as shown in (b) of FIG. 4C, the optical The first adhesive layer 540 may be located at two sides of the four sides of the sheet 520 facing each other.

As another example, referring to FIG. 4D, a plurality of holes 527 may be formed in the optical sheet 520. The plurality of holes 527 may pass through the first adhesive layer 540 to support the optical sheet 520.

More specifically, referring to FIGS. 4D and 4B, the second sheet 523 positioned on the first sheet 521 includes a plurality of holes 527. In addition, a first adhesive layer 540 positioned on the first sheet 521 and penetrating the hole 527 of the second sheet 523 may be attached to the third sheet 525. Therefore, the 1st sheet 521, the 2nd sheet 523, and the 3rd sheet 525 can be integrally adhere | attached.

The first adhesive layer 540 may be made of a pressure sensitive adhesive (PSA) or an optical transparent adhesive (OCA) and the like, and may be applied to a thickness of 20 to 50 μm.

Therefore, in the first exemplary embodiment of the present invention, the first adhesive layer 540 is formed in the first area A of the optical sheet 520 corresponding to the non-display area N of the liquid crystal panel 530 to form an integrated optical body. By providing the sheet 520, there is an advantage in that a thin liquid crystal display device in which optical characteristics are not degraded can be provided.

5 is a diagram illustrating a liquid crystal display according to a second exemplary embodiment of the present invention. Hereinafter, a description of the same configuration as in the above-described embodiment will be omitted.

In the second embodiment of the present invention, the liquid crystal panel 530 may be adhered to the plurality of optical sheets 520 according to the first embodiment.

In more detail, the second adhesive layer may be formed on the edge of the first area of the emission surface 525b of the third sheet 525 adjacent to the liquid crystal panel 530 of the plurality of optical sheets 520, that is, the edge of the third sheet 525. 550 may be located. Thus, the plurality of optical sheets 520 and the liquid crystal panel 530 bonded to the first adhesive layer 540 may be integrally bonded.

Accordingly, as in the first embodiment described above, the second adhesive layer 550 is positioned in the non-display area N of the liquid crystal panel 530 in which no image is displayed, whereby a thin liquid crystal display in which optical characteristics are not deteriorated. There is an advantage to provide a device.

6 is a diagram illustrating a liquid crystal display according to a third exemplary embodiment of the present invention. Hereinafter, a description of the same configuration as in the above-described embodiment will be omitted.

In the third exemplary embodiment of the present invention, a glass substrate (not shown) is formed on the liquid crystal panel 530 in addition to the structure in which the plurality of optical sheets 520 and the liquid crystal panel 530 are bonded to each other according to the first and second embodiments described above. 560 may be further glued.

The glass substrate 560 may be a tempered glass substrate that may protect the upper portion of the liquid crystal panel 530 from external impact.

In more detail, the third adhesive layer 570 may be disposed in the non-display area N of the liquid crystal panel 530 to bond the glass substrate 560 to the liquid crystal panel 530. Accordingly, the plurality of optical sheets 520 bonded to the first adhesive layer 540 described above, the optical sheet 520 bonded to the second adhesive layer 550, the liquid crystal panel 530, and the third adhesive layer 570. As a result, the liquid crystal panel 530 and the glass substrate 560 may be integrally formed.

Accordingly, as in the above-described embodiment, the third adhesive layer 570 is positioned in the non-display area N of the liquid crystal panel 530 where the image is not displayed to bond the liquid crystal panel 530 and the glass substrate 560. By doing so, there is an advantage that a thin liquid crystal display device in which optical characteristics are not deteriorated can be provided.

7 is a diagram illustrating a liquid crystal display according to a fourth exemplary embodiment of the present invention. Hereinafter, a description of the same configuration as in the above-described embodiment will be omitted.

In the fourth exemplary embodiment of the present invention, the optical sheets 520, the liquid crystal panel 530, and the glass substrate 560 are bonded to each other and the lower portion of the optical sheets 520 according to the above-described embodiments. The light source unit 510 may be further bonded.

The light source unit 510 may be composed of a first layer, a plurality of light sources, a second layer, and a reflective layer, which has been described in detail above, and thus description thereof will be omitted.

In a fourth embodiment of the present invention, the fourth adhesive layer 580 is positioned between the first region of the plurality of optical sheets 520, that is, the edge of the optical sheet 520 and the light source 510. 520 and the light source unit 510 may be bonded.

That is, the plurality of optical sheets 520 adhered to the first adhesive layer 540 described above, the optical sheet 520 adhered to the second adhesive layer 550, the liquid crystal panel 530, and the third adhesive layer 570. As a result, the liquid crystal panel 530, the glass substrate 560, the plurality of optical sheets 520, and the light source unit 510 may be bonded to each other to form a single body.

In particular, in the fourth exemplary embodiment, when the light source unit 510 is an edge type, the fourth adhesive layer 580 may be positioned between the light guide plate positioned at the top of the light source unit 510 and the optical sheet 520.

Accordingly, as in the above-described embodiment, the fourth adhesive layer 580 is positioned at the edge of the optical sheet 520 corresponding to the non-display area N of the liquid crystal panel 530 in which no image is displayed. By bonding the 520 and the light source unit 510, there is an advantage in that a thin liquid crystal display device in which optical characteristics are not degraded can be provided.

8 is a diagram illustrating a liquid crystal display according to a fifth exemplary embodiment of the present invention. Hereinafter, a description of the same configuration as in the above-described embodiment will be omitted.

In the fifth embodiment of the present invention, the optical sheet 520, the liquid crystal panel 530, the glass substrate 560 and the light source unit 510 is bonded to the plurality of optical sheets according to the above-described embodiment, The diffusion plate 590 may be further bonded between the 520 and the light source 510.

The diffusion plate 590 may serve to diffuse the light emitted from the light source unit 510 evenly to the optical sheet 520 when the light source unit 510 is a direct type rather than an edge type.

In more detail, the fifth adhesive layer 600 is positioned between the first region of the plurality of optical sheets 520, that is, the edge of the optical sheet 520 and the diffusion plate 590, so that the optical sheet 520 and the diffusion plate 590 are positioned. ) Can be glued.

That is, the plurality of optical sheets 520 adhered to the first adhesive layer 540 described above, the optical sheet 520 adhered to the second adhesive layer 550, the liquid crystal panel 530, and the third adhesive layer 570. A plurality of optical sheets 520 bonded to the liquid crystal panel 530 and a glass substrate 560 bonded to each other, a fifth adhesive layer 600, a diffusion plate bonded to the diffusion plate 590, and a fourth adhesive layer 580. The 590 and the light source unit 510 may be bonded to each other to be integrally formed.

Accordingly, as in the above-described embodiment, the fifth adhesive layer 600 is positioned at the edge of the optical sheet 520 corresponding to the non-display area N of the liquid crystal panel 530 in which the image is not displayed. By adhering the 520 and the diffusion plate 590, there is an advantage in that a thin liquid crystal display device in which optical characteristics are not degraded can be provided.

9 illustrates a liquid crystal display according to a sixth exemplary embodiment of the present invention. Hereinafter, a description of the same configuration as in the above-described embodiment will be omitted.

Referring to FIG. 9, the liquid crystal panel 530 may include a non-display area N and a display area P on which an image is not displayed. The plurality of optical sheets 520 respectively include a first area A and a second area B corresponding to the non-display area N and the display area P of the liquid crystal panel 530, respectively. The first adhesive layer 540 may be located between the first regions A of the optical sheet 520.

More specifically, the plurality of optical sheets 520 may include a first sheet 521, a second sheet 523 positioned on the first sheet 521, and a third sheet positioned on the second sheet 523. 525). The first sheet 521 may include an incident surface 521a through which light is incident from the light source unit, and an emission surface 521b through which light is emitted, and the second sheet 523 may include an emission surface 523b.

The first adhesive layer 540 may be located in the first region A of the optical sheet 520. Here, the first area A may be an edge of the exit surface 521b of the first sheet 521, the side surface and the exit surface 523b of the second sheet 523, and the third sheet 525. It may be a side of. The first adhesive layer 540 may be located in the non-display area N of the liquid crystal panel 530.

Therefore, the first sheet 521, the second sheet 523, the third sheet 525, and the liquid crystal panel 530 may be bonded through the first adhesive layer 540 to have an integral structure.

As in the above-described embodiments, the first adhesive layer 540 constitutes the optical sheet 520 of the first area A of the optical sheet 520 corresponding to the non-display area N of the liquid crystal panel 530. It may be located on at least one side of the four sides. More preferably, in order to increase the reliability of the adhesion, the first adhesive layer 540 may be located on all four sides of the optical sheet 520, and two of the four sides of the optical sheet 520 facing each other. The first adhesive layer 540 may be located at. In addition, the first adhesive layer 540 may be formed in a dot shape.

The first adhesive layer 540 may be made of a pressure sensitive adhesive (PSA) or an optical transparent adhesive (OCA) and the like, and may be applied to a thickness of 20 to 50 μm.

Therefore, in the sixth exemplary embodiment of the present invention, the first adhesive layer 540 is formed in the first area A of the optical sheet 520 corresponding to the non-display area N of the liquid crystal panel 530 to form an integrated optical body. By providing the sheet 520, there is an advantage in that a thin liquid crystal display device in which optical characteristics are not degraded can be provided.

10 is a diagram illustrating a liquid crystal display according to a seventh exemplary embodiment of the present invention. Hereinafter, a description of the same configuration as in the above-described embodiment will be omitted.

The non-display area N of the liquid crystal panel 530 may be at least one side surface of the liquid crystal panel 530 unlike the above-described embodiments. The glass substrate 560 may be positioned on the liquid crystal panel 530.

The first adhesive layer 540 may be located in the first region A of the optical sheet 520. Here, the first area A may be an edge of the exit surface 521b of the first sheet 521, the side surface and the exit surface 523b of the second sheet 523, and the third sheet 525. It may be a side of. In addition, the first adhesive layer 540 may be disposed on the non-display area N of the liquid crystal panel 530, that is, the side surface of the liquid crystal panel 530. In addition, the first adhesive layer 540 may be positioned at an edge of the glass substrate 560 corresponding to the non-display area N of the liquid crystal panel 530.

That is, the first sheet 521, the second sheet 523, the third sheet 525, the liquid crystal panel 530, and the glass substrate 560 are bonded through the first adhesive layer 540 to have an integral structure. Can be.

Accordingly, the first adhesive layer 540 is positioned in the first area of the optical sheet 520 corresponding to the non-display area N of the liquid crystal panel 530 in which the image is not displayed. By adhering the 530 and the glass substrate 560, there is an advantage that a thin liquid crystal display device in which optical characteristics are not degraded can be provided.

11 is a diagram illustrating a liquid crystal display according to an eighth embodiment of the present invention. Hereinafter, a description of the same configuration as in the above-described embodiment will be omitted.

In the eighth embodiment of the present invention, in addition to the structure in which the plurality of optical sheets 520, the liquid crystal panel 530 and the glass substrate 560 is bonded to the seventh embodiment, the plurality of optical sheets 520 The light source unit 510 may be further adhered to the lower portion.

The light source unit 510 may be composed of a first layer, a plurality of light sources, a second layer, and a reflective layer, which has been described in detail above, and thus description thereof will be omitted.

In detail, the fourth adhesive layer 580 is positioned between the first region of the plurality of optical sheets 520, that is, the edge of the incident surface 521a of the first sheet 520 and the light source unit 510, so that the optical sheet 520 is positioned. ) And the light source unit 510 may be bonded.

That is, the plurality of optical sheets 520, the liquid crystal panel 530, the glass substrate 560, and the optical sheet 520 and the light source unit 510 bonded to the first adhesive layer 540 described above may be integrally formed. Can be.

Accordingly, as in the above-described embodiments, the fourth adhesive layer 580 is positioned at the edge of the optical sheet 520 corresponding to the non-display area N of the liquid crystal panel 530 in which no image is displayed. By bonding the 520 and the light source unit 510, there is an advantage in that a thin liquid crystal display device in which optical characteristics are not degraded can be provided.

12 illustrates a liquid crystal display according to a ninth embodiment of the present invention. Hereinafter, a description of the same configuration as in the above-described embodiment will be omitted.

In the ninth embodiment of the present invention, the optical sheet 520, the liquid crystal panel 530, the glass substrate 560 and the light source unit 510 are bonded to each other according to the eighth embodiment. The diffusion plate 590 may be further adhered between the optical sheet 520 and the light source 510.

The diffusion plate 590 may serve to diffuse the light emitted from the light source unit 510 evenly to the optical sheet 520 when the light source unit 510 is a direct type rather than an edge type.

In more detail, the fifth adhesive layer 600 is positioned between the first region of the plurality of optical sheets 520, that is, the edge of the optical sheet 520 and the diffusion plate 590, so that the optical sheet 520 and the diffusion plate 590 are positioned. ) Can be glued.

That is, in addition to the plurality of optical sheets 520, the liquid crystal panel 530, and the glass substrate 560 bonded to the first adhesive layer 540 described above, and the light source unit 510 bonded to the fourth adhesive layer 540, The diffusion plate 590 may be adhered between the optical sheet 520 and the light source unit 510 by the fifth adhesive layer 600 to be integrally formed.

Accordingly, as in the above-described embodiments, the fifth adhesive layer 600 is positioned at the edge of the optical sheet 520 corresponding to the non-display area N of the liquid crystal panel 530 in which the image is not displayed. By adhering the 520 and the diffusion plate 590, there is an advantage in that a thin liquid crystal display device in which optical characteristics are not degraded can be provided.

As described above, in the liquid crystal display according to the above-described various embodiments, an adhesive layer for fixing the optical sheet is positioned in the first area corresponding to the non-display area of the liquid crystal panel. Therefore, the tabs protruding from the sides of the sheet can be removed in the fixing structure by the double-sided tape or the boss, so that the size of the bezel can be reduced.

In addition, since at least one of the optical sheet, the liquid crystal panel, the glass substrate, the light source unit, and the diffusion plate has an integrated structure due to the adhesive layer, a frame for fixing such components is conventionally removed, thereby providing a thin liquid crystal display device. can do.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that the invention may be practiced. Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all aspects. In addition, the scope of the present invention is shown by the claims below, rather than the above detailed description. Also, it is to be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention.

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

2 is a cross-sectional view showing a simplified configuration of the display module shown in FIG.

3 is a cross-sectional view illustrating a configuration of a backlight unit according to an exemplary embodiment of the present invention.

4A is a cross-sectional view of a liquid crystal display according to a first embodiment of the present invention. FIGS. 4B and 4C are plan views of the optical sheet of FIG. 4A, and FIG. 4D is a view showing region E of FIG. 4A and region F of FIG. 4C. .

5 is a cross-sectional view of a liquid crystal display according to a second exemplary embodiment of the present invention.

6 is a cross-sectional view of a liquid crystal display according to a third exemplary embodiment of the present invention.

7 is a cross-sectional view illustrating a liquid crystal display device according to a fourth embodiment of the present invention.

8 is a cross-sectional view illustrating a liquid crystal display device according to a fifth embodiment of the present invention.

9 is a cross-sectional view of a liquid crystal display according to a sixth embodiment of the present invention.

10 is a cross-sectional view illustrating a liquid crystal display according to a seventh embodiment of the present invention.

11 is a cross-sectional view illustrating a liquid crystal display device according to an eighth embodiment of the present invention.

12 is a cross-sectional view of a liquid crystal display according to a ninth embodiment of the present invention.

Claims (20)

A light source unit including at least one light source; A plurality of optical sheets positioned on the light source unit; And It includes a liquid crystal panel positioned on the plurality of optical sheets, The plurality of optical sheets may include first and second regions respectively corresponding to non-display regions and display regions of the liquid crystal panel, and the first adhesive layer may be positioned between the first regions of the plurality of optical sheets. LCD display device. The method of claim 1, The plurality of optical sheets includes a first sheet, a second sheet positioned on the first sheet, and a third sheet disposed on the second sheet. 3. The method of claim 2, Each of the first to third sheets includes an entrance surface to which light of the light source is incident and an emission surface to which light of the light source is emitted. The method of claim 3, And the first area is an edge of each of the first to third sheets, and the second area is a central portion excluding the edge. The method of claim 4, wherein And the first adhesive layer is positioned between the exit surface of the first sheet and the entrance surface of the second sheet, and between the exit surface of the second sheet and the entrance surface of the third sheet, respectively. The method of claim 5, And a second adhesive layer positioned between the non-display area of the liquid crystal panel and the first area of the third sheet. The method of claim 6, Further comprising a glass substrate located on the liquid crystal panel, And a third adhesive layer disposed between the non-display area of the liquid crystal panel and the glass substrate corresponding to the non-display area of the liquid crystal panel. The method of claim 7, wherein And a fourth adhesive layer disposed between the optical sheet and the light source unit corresponding to the first region of the optical sheet. The method of claim 8, Further comprising a diffuser plate located between the optical sheet and the light source unit, And a fifth adhesive layer disposed between the optical sheet and the diffusion plate corresponding to the first region of the optical sheet. The method of claim 9, And the first to fifth adhesive layers are positioned on at least one of four sides constituting the first sheet. The method of claim 4, wherein The second region includes a plurality of holes, The first adhesive layer penetrates the plurality of holes. 3. The method of claim 2, And the first region is an edge of the first sheet and is side surfaces of the second sheet and the third sheet. The method of claim 12, And the first adhesive layer is positioned at edges of the first sheet, side surfaces of the second sheet and the third sheet. The method of claim 13, And the first adhesive layer contacts the non-display area of the liquid crystal panel. 15. The method of claim 14, Further comprising a glass substrate located on the liquid crystal panel, And the first adhesive layer is positioned between the non-display area of the liquid crystal panel and the glass substrate corresponding to the non-display area of the liquid crystal panel. The method of claim 15, And a fourth adhesive layer disposed between the optical sheet and the light source unit corresponding to the first region of the optical sheet. The method of claim 16, Further comprising a diffuser plate located between the optical sheet and the light source unit, And a fifth adhesive layer disposed between the optical sheet and the diffusion plate corresponding to the first region of the optical sheet. The method of claim 17, And the first to fifth adhesive layers are positioned on at least one of four sides constituting the first sheet. The method of claim 1, The light source unit, A first layer mounting the light source; And And a second layer on the first layer and covering the light source. The method of claim 19, And a reflective layer formed between the first layer and the second layer.

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