KR101672421B1 - Back Light Unit and Display Apparatus - Google Patents

Abstract

The present invention relates to a backlight unit and a display device.
A backlight unit according to the present invention includes a substrate, a plurality of light sources disposed on a front surface of the substrate, and a connector disposed on a rear surface of the substrate and electrically connected to at least one light source, Wherein a distance between the first connector and the second connector is the shortest distance between an end of the substrate adjacent to the first connector and an end of the substrate adjacent to the second connector, As shown in FIG.

Description

BACKLIGHT UNIT AND DISPLAY APPARATUS Technical Field [1]

The present invention relates to a backlight unit and a display device.

(PDP), Electro Luminescent Display (ELD), Vacuum Fluorescent Display (VFD), and the like have been developed in recent years in response to the demand for display devices. Display) have been studied and used. Among them, a liquid crystal panel of an LCD includes a TFT substrate and a color filter substrate which are opposed to each other with a liquid crystal layer and a liquid crystal layer interposed therebetween, and an image can be displayed using light provided from the backlight unit.

An object of the present invention is to provide a backlight unit and a display device for reducing the thickness and facilitating the manufacturing process.

A backlight unit according to the present invention includes a substrate, a plurality of light sources disposed on a front surface of the substrate, and a connector disposed on a rear surface of the substrate and electrically connected to at least one light source, Wherein a distance between the first connector and the second connector is the shortest distance between an end of the substrate adjacent to the first connector and an end of the substrate adjacent to the second connector, As shown in FIG.

When a straight line passing through the first connector and the second connector is referred to as a first straight line, an interval between the first connector and the second connector on the first straight line is smaller than a distance between the first connector and the second connector, And the distance between the end of the substrate adjacent to the second connector and the end of the substrate.

The light source connected to the first connector and the light source connected to the second connector may be electrically independent from each other.

An adhesive layer may be disposed between the connector and the back surface of the substrate.

Further, the adhesive layer may include conductive particles.

In addition, the connector can electrically connect an external driving circuit to the light source.

According to another aspect of the present invention, there is provided a backlight unit including a substrate, a plurality of light sources disposed on a front surface of the substrate, and a connector disposed on a rear surface of the substrate and electrically connected to the at least one light source, Wherein the connector includes a first connector, a second connector, and a third connector arranged side by side, wherein an interval between the first connector and the second connector is different from an interval between the second connector and the third connector have.

The distance between the second connector and the third connector is larger than the distance between the first connector and the second connector and the shortest distance between the end of the substrate adjacent to the first connector and the second connector, And the shortest distance between the ends of the adjacent substrates may be smaller than the distance between the second connector and the third connector.

The connector may further include a fourth connector adjacent to the third connector, and the gap between the second connector and the third connector may be larger than the gap between the third connector and the fourth connector.

According to another aspect of the present invention, there is provided a display device including a substrate, a plurality of light sources disposed on a front surface of the substrate, a plurality of connectors disposed on a rear surface of the substrate and electrically connected to the at least one light source, And a hole formed in the rear cover. At least two of the connectors may be disposed at positions corresponding to one of the holes.

The connector includes a first connector and a second connector, and the gap between the first connector and the second connector is a shortest distance between an end of the substrate adjacent to the first connector and the second connector, May be smaller than the shortest distance between the ends of the adjacent substrates.

In addition, the first connector and the second connector may be located in the same hole.

According to another aspect of the present invention, there is provided a display device including a substrate, a plurality of light sources disposed on a front surface of the substrate, a plurality of connectors disposed on a rear surface of the substrate and electrically connected to the at least one light source, And a plurality of holes formed in the rear cover, wherein the connector is disposed at a position corresponding to the hole, and the hole corresponding to at least one of the plurality of connectors is connected to the other May be different from the corresponding hole.

Further, the connector may include a first connector, a second connector, and a third connector arranged side by side, and an interval between the first connector and the second connector may be a distance between the second connector and the third connector The first connector and the second connector are located in a first hole of the plurality of holes and the third connector is located in a second hole of the plurality of holes, .

The distance between the first hole and the second hole may be greater than the length of the first hole and / or the second hole.

The connector further includes a fourth connector adjacent to the third connector, wherein a distance between the third connector and the fourth connector is smaller than an interval between the second connector and the third connector, And may be located in the second hole.

According to another aspect of the present invention, there is provided a backlight unit including a substrate, a plurality of light sources disposed on a front surface of the substrate, and a connector disposed on a rear surface of the substrate and electrically connected to at least one light source, The substrate is divided into a plurality of sub-substrates, each of which is arranged with at least one light source, and the connector is arranged on the rear surface of each of the sub-substrates, the substrate includes a first sub-substrate and a second sub- , A first connector is disposed on a rear surface of the first sub-board, a second connector is disposed on a rear surface of the second sub-board, and a second connector is disposed between the first connector and the first side of the first sub- Is greater than an interval between the first connector and the second side facing the first side of the first sub-board, and the interval between the second connector and the second sub- Is smaller than the distance between the second connector and the second side facing the first side of the second sub-board, and the distance between the second side of the second sub- And the first side of the second sub-substrate may be arranged to face each other.

The gap between the first connector and the second connector may be a distance between the first connector and the first side of the first sub-board and a gap between the second connector and the second side of the second sub- .

When the first sub-substrate is referred to as a first type sub-substrate and the second sub-substrate is referred to as a second type sub-substrate, the first type sub substrate and the second type sub substrate may be alternately arranged have.

According to another aspect of the present invention, there is provided a display device including a substrate, a plurality of light sources disposed on a front surface of the substrate, a connector disposed on a rear surface of the substrate and electrically connected to the at least one light source, And a plurality of holes formed in the rear cover, wherein the substrate is divided into a plurality of sub-substrates, each of which is provided with at least one light source, and each of the sub- The connectors are arranged and the connectors disposed on two adjoining sub-boards may be disposed at positions corresponding to the same holes.

The substrate includes a first sub-substrate and a second sub-substrate adjacent to each other, a first connector is disposed on a rear surface of the first sub-substrate, a second connector is disposed on a rear surface of the second sub- The first connector and the second connector may be located in the same hole.

The length of the hole may be smaller than the width of the first sub-substrate and / or the second sub-substrate in the longitudinal direction of the hole.

By arranging at least two connectors disposed on the rear surface of the substrate according to the present invention, the thickness of the display device is reduced and the manufacturing process is facilitated.

1 is an exploded perspective view showing a configuration of a display device;
2 is a schematic cross-sectional view of a display device according to an embodiment of the present invention;
3 is a cross-sectional view of the backlight unit;
4 is a cross-sectional view of another configuration of the backlight unit;
FIGS. 5 to 8 are diagrams for explaining the direct-type method; FIG.
Figs. 9 to 20 are diagrams for explaining the connector in more detail; Fig. And
FIGS. 21 to 26 are views for explaining a case where the substrate is divided into a plurality of sub-substrates.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood that the present invention is not intended to be limited to the specific embodiments but includes all changes, equivalents, and alternatives falling within the spirit and scope of the present invention.

In describing the present invention, the terms first, second, etc. may be used to describe various components, but the components may not be limited by the terms. The terms may only be used for the purpose of distinguishing one element from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The term " and / or " may include any combination of a plurality of related listed items or any of a plurality of related listed items.

When an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may be present in between Can be understood. On the other hand, when it is mentioned that an element is "directly connected" or "directly connected" to another element, it can be understood that no other element exists in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions may include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used interchangeably to designate one or more of the features, numbers, steps, operations, elements, components, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries can be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are, unless expressly defined in the present application, interpreted in an ideal or overly formal sense .

In addition, the following embodiments are provided to explain more fully to the average person skilled in the art. The shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

FIG. 1 is an exploded perspective view of the configuration of a display device. FIG.

1, the display device 1 may include a front cover 30, a rear cover 40, and a display module 20 disposed between the front cover 30 and the back cover 40 .

The front cover 30 may be disposed to surround the display module 20 and may include a front panel (not shown) of a substantially transparent material capable of transmitting light. Here, the front panel may be disposed on the front surface of the display module 20 at regular intervals to protect the display module 20 from an external impact.

2 is a cross-sectional view of a display device according to an embodiment of the present invention.

2, the display module 20 included in the display device may include a display panel 100 and a backlight unit 200. Referring to FIG.

The display panel 100 may include a color filter substrate 110 and a TFT (Thin Film Transistor) substrate 120 so as to be opposed to each other to maintain a uniform cell gap. In addition, a liquid crystal layer (not shown) may be disposed between the color filter substrate 110 and the TFT substrate 120.

The color filter substrate 110 includes a plurality of pixels composed of red (R), green (G), and blue (B) subpixels and generates an image corresponding to red, green, .

The pixels may be composed of red, green, and blue subpixels, but the red, green, blue, and white (W) subpixels constitute one pixel, and the present invention is not limited thereto.

The TFT substrate 120 can switch a pixel electrode (not shown) as a switching element.

The liquid crystal layer is made up of a plurality of liquid crystal molecules, and the liquid crystal molecules can change the arrangement in accordance with a voltage difference generated between a pixel electrode and a common electrode (not shown) The light can be incident on the color filter substrate 110 in accordance with the change in molecular arrangement of the liquid crystal layer.

The upper polarizer 130 and the lower polarizer 140 may be disposed on the upper and lower sides of the display panel 100 and more specifically the upper polarizer 130 may be formed on the upper surface of the color filter substrate 110 And a lower flat plate 140 may be formed on the lower surface of the TFT substrate 120.

A gate and a data driver (not shown) may be provided on a side surface of the display panel 100 to generate a driving signal for driving the panel 100.

The structure and configuration of the display panel 100 are merely examples, and modifications, additions, and deletions of the embodiments are possible within the scope of the present invention.

2, the display device according to the embodiment of the present invention can be configured by closely attaching the backlight unit 200 to the display panel 100. For example, the backlight unit 200 may be attached to and fixed to the lower surface of the display panel 100, more specifically, to the lower polarizer 140. For this purpose, the backlight unit 200 may be fixed between the lower polarizer 140 and the backlight unit 200 An adhesive layer (not shown) may be formed.

By forming the backlight unit 200 in close contact with the display panel 100 as described above, the overall thickness of the display device can be reduced to improve the appearance, and the structure for fixing the backlight unit 200 can be removed, And the manufacturing process can be simplified. In addition, by reducing the space between the backlight unit 200 and the display panel 100, it is possible to prevent a malfunction of the display device due to the insertion of foreign substances into the space or deterioration of the image quality of the display image.

According to an exemplary embodiment of the present invention, the backlight unit 200 may include a plurality of functional layers stacked, and at least one of the plurality of functional layers may include a plurality of light sources (not shown) .

The backlight unit 200 and more specifically the plurality of layers constituting the backlight unit 200 may be disposed on the lower surface of the display panel 100 so that the backlight unit 200 is in contact with the lower surface of the display panel 100. [ It is preferable that they are made of a material having flexibility.

A bottom cover (not shown) on which the backlight unit 200 is mounted may be provided on the lower side of the backlight unit 200.

According to an embodiment of the present invention, the display panel 100 may be divided into a plurality of regions, and may be divided into a plurality of regions corresponding to a gray peak value or a color coordinate signal of each of the divided regions from a corresponding region of the backlight unit 200 The brightness of the emitted light, that is, the brightness of the light source is adjusted, so that the brightness of the display panel 100 can be adjusted.

For this purpose, the backlight unit 200 may be divided into a plurality of divided driving regions corresponding to the respective divided regions of the display panel 100 and operated.

3 is a view showing a cross section of the backlight unit.

Referring to FIG. 3, the backlight unit 200 may include a substrate 210, a light source 220, a resin layer 230, and a reflective layer 240.

The plurality of light sources 220 may be formed on the substrate 210 and the resin layer 230 may be formed on the substrate 210 to surround the plurality of light sources 220.

An electrode pattern (not shown) for connecting the connector (not shown) and the light source 220 (not shown) may be formed on the substrate 210. For example, a carbon nanotube electrode pattern (not shown) for connecting the light source 220 and the connector may be formed on the upper surface of the substrate 210. The connector may be electrically connected to a power supply unit (not shown) that supplies power to the light source 220.

The substrate 210 may be a printed circuit board (PCB) including a material such as polyethylene terephthalate, glass, polycarbonate, and silicone. In addition, the substrate 210 may be a film substrate.

The light source 220 may be one of a light emitting diode (LED) chip or a light emitting diode package having at least one light emitting diode chip. In the present embodiment, a light emitting diode package is provided as the light source 220. FIG.

The light source 220 may be a colored LED or a white LED that emits at least one color among colors such as red, blue, green, and the like. Also, the colored LED may include at least one of a red LED, a blue LED, and a green LED, and the arrangement and emission light of such a light emitting diode may be changed within the technical scope of the embodiment.

The resin layer 230 disposed on the upper side of the substrate 210 transmits and diffuses the light emitted from the light source 220 to uniformly transmit light emitted from the light source 220 to the display panel 100 .

A reflective layer 240 may be formed between the substrate 210 and the resin layer 230 or more specifically on the upper surface of the substrate 210 to reflect light emitted from the light source 220.

The reflective layer 240 may reflect the light totally reflected from the boundary of the resin layer 230 to diffuse the light emitted from the light source 220 more widely.

The reflective layer 240 may be formed by dispersing a white pigment such as titanium oxide in a synthetic resin sheet, a metal vapor-deposited film on a surface thereof, or a sheet made of a synthetic resin in which bubbles are dispersed in order to scatter light. , And silver (Ag) may be coated on the surface to increase the reflectance. Alternatively, the reflective layer 240 may be coated on the upper surface of the substrate 210.

The resin layer 230 may be composed of various resins having light transmittance. For example, the resin layer 230 may include any one material selected from the group consisting of polyethylene terephthalate, polycarbonate, polypropylene, polyethylene, polystyrene, and polyepoxy, silicone, acrylic, or at least two materials. Do.

The refractive index of the resin layer 230 may be about 1.4 to 1.6 so that the light emitted from the light source 220 is diffused and the backlight unit 200 has a uniform brightness.

The resin layer 230 may include a polymer resin having adhesion so as to firmly adhere to the light source 220 and the reflective layer 240. For example, the second layer 230 may comprise at least one of an unsaturated polyester, methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, n-butyl methacrylate, n-butyl methyl methacrylate, Hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxyethyl acrylate, acrylamide, methylol acrylamide, glycidyl methacrylate, ethyl acrylate, isobutyl acrylate, n-butyl acrylate, 2 -Ethylhexyl acrylate polymer, a copolymer or a terpolymer, and the like, acrylic, urethane, epoxy, melamine and the like.

The resin layer 230 may be formed by applying a liquid or gel resin to the upper surface of the substrate 210 on which the plurality of light sources 220 and the reflective layer 240 are formed and then curing the resin, And may be separately formed and bonded to the upper surface of the substrate 210.

As the thickness T of the resin layer 230 increases, the light emitted from the light source 200 spreads more widely, and light of a uniform brightness from the backlight unit 200 can be provided to the display panel 100. On the other hand, as the thickness T of the resin layer 230 increases, the amount of light absorbed in the second layer 230 may increase, and thus the amount of light supplied from the backlight unit 200 to the display panel 100 The luminance can be reduced as a whole.

The thickness T of the resin layer 230 is 0.1 to 4.5 mm in order to provide light of uniform brightness without significantly reducing the brightness of the light provided from the backlight unit 200 to the display panel 100 desirable.

4 is a cross-sectional view of another configuration of the backlight unit. Hereinafter, the description of the parts described in detail in FIG. 3 will be omitted.

4, a plurality of light sources 220 may be mounted on a substrate 210, and a resin layer 230 may be disposed on a substrate 210. Referring to FIG. Meanwhile, a reflective layer 240 may be formed between the substrate 210 and the resin layer 230.

The resin layer 230 may include a plurality of scattering particles 231. The scattering particles 231 scatter or refract incident light so that the light emitted from the light source 220 is diffused more widely. can do.

The scattering particles 231 are formed of a material having a refractive index different from that of the material constituting the resin layer 230 in order to scatter or refract light emitted from the light source 220, Or a material having a refractive index higher than that of the acrylic resin.

For example, the scattering particles 231 may be selected from the group consisting of polymethylmethacrylate / styrene copolymer (MS), polymethylmethacrylate (PMMA), polystyrene (PS), silicon, titanium dioxide (TiO2) ), And the like, and may be formed by combining the above materials.

The scattering particles 231 may be formed of a material having a refractive index lower than that of the material of the resin layer 230. For example, the scattering particles 231 may be formed by forming bubbles in the resin layer 230 .

In addition, the material constituting the scattering particles 231 is not limited to the above-described materials, and may be formed using various polymer materials or inorganic particles.

The resin layer 230 may be formed by mixing scattering particles 231 with a liquid or gel resin and then irradiating the substrate 210 on which the plurality of light sources 220 and the reflective layer 240 are formed ), And then curing it.

4, an optical sheet 250 may be disposed on the upper side of the resin layer 230. For example, the optical sheet 250 may include a prism sheet 251 and a diffusion sheet 252 . In this case, the plurality of sheets included in the optical sheet 250 are provided without being spaced apart from each other and adhered or adhered to each other, so that the thickness of the optical sheet 250 or the backlight unit 200 can be minimized.

The lower surface of the optical sheet 250 is in close contact with the resin layer 230 so that the upper surface of the optical sheet 250 is in contact with the lower surface of the display panel 100 and more specifically the lower polarizer 140 .

The diffusion sheet 252 diffuses the incident light to prevent the light from the resin layer 230 from being partially concentrated, thereby uniformizing the brightness of the light. The prism sheet 251 condenses the light emitted from the diffusion sheet 252 and allows light to be vertically incident on the display panel 100.

According to another embodiment of the present invention, at least one of the optical sheet 250 as described above, e.g., the prism sheet 251 and the diffusion sheet 252, may be removed, or the prism sheet 251 and / And may further include various functional layers other than the diffusion sheet 252. [

The LED package constituting the light source 220 in the direct-down type may be divided into a top view mode and a side view mode depending on the direction in which the light emitting surface is directed. The following is a look at this.

5 to 7 are diagrams for explaining the direct-down method.

FIG. 5 shows a top view method in the direct-down method.

5, the plurality of light sources 220 provided in the backlight unit 200 are arranged such that the light-emitting surfaces thereof are disposed on the upper surface thereof and are arranged in a direction perpendicular to the substrate 210 or the reflective layer 240 Light can be emitted.

FIG. 6 shows a side view method of the direct down method.

6, each of the plurality of light sources 220 provided in the backlight unit 200 may have a light emitting surface disposed on a side surface thereof to emit light in a lateral direction, that is, in a direction parallel to the substrate 210 or the reflective layer 240. [ can do. For example, the plurality of light sources 220 may be configured using a side-view LED package, thereby reducing the problem that the light source 220 is viewed as a hot spot on the screen The thickness T of the resin layer 230 can be reduced to realize the slimming of the backlight unit 200 and further the display device.

Referring to FIG. 7, the backlight unit 200 may include a plurality of resin layers 230 and 235.

The light emitted to the side from the light source 220 may travel through the first resin layer 230 to the region where the adjacent light source 225 is disposed.

Some of the light transmitted through the first resin layer 230 may be emitted toward the upper side of the display panel 100. For this, the first resin layer 230 may include a plurality of scattering particles 231 as described with reference to FIG. 4 to scatter or refract the direction of the traveling light upward.

Also, some of the light emitted from the light source 220 may be incident on the reflective layer 240, and the light incident on the reflective layer 240 may be reflected and diffused upward.

On the other hand, a large amount of light can be emitted from a region adjacent to the light source 220 due to a strong scattering phenomenon near the light source 220 or light emitted in a direction close to the image side from the light source 220, Light of brightness can be observed. As shown in FIG. 7, the first light shielding pattern 260 may be formed on the first resin layer 230 to reduce the brightness of light emitted from the light source 220. Accordingly, light of uniform luminance can be emitted from the backlight unit 200. For example, the first light-shielding pattern 260 may be formed on the first resin layer 230 to correspond to a position where the plurality of light sources 220 are disposed, and a part of the light incident from the light source 220 may be It is possible to reduce the brightness of the light emitted upward by blocking the remaining part.

The first light-shielding pattern 260 may be made of titanium dioxide (TiO ₂ ). In this case, a part of the light incident from the light source 220 may be reflected downward and partially transmitted.

According to an embodiment of the present invention, a second resin layer 235 may be disposed on the first resin layer 230. The second resin layer 235 may be formed of the same or different material as the first resin layer 230 and may be formed by diffusing light emitted upward from the first resin layer 230, The uniformity of light luminance can be improved.

The second resin layer 235 may be made of a material having the same refractive index as the material of the first resin layer 230, or may be made of a material having a different refractive index.

For example, when the second resin layer 235 is composed of a material having a refractive index higher than that of the first resin layer 230, the light emitted from the first resin layer 230 can be diffused more widely.

On the contrary, when the second resin layer 235 is made of a material having a refractive index lower than that of the first resin layer 230, light emitted from the first resin layer 230 is reflected by the lower surface of the second resin layer 235 The light emitted from the light source 220 can be more easily propagated along the first resin layer 230.

The first resin layer 230 and the second resin layer 235 may each include a plurality of scattering particles. In this case, the density of the scattering particles included in the second resin layer 235 may be different from that of the first resin layer 235. [ May be higher than the density of the scattering particles contained in the scattering particles 230. When scattering particles are included in the second resin layer 235 with a higher density, the light emitted upward from the first resin layer 230 can be diffused more widely, and the light emitted from the backlight unit 200, It is possible to make the luminance of the light emitted from the light source more uniform.

The second light shielding pattern 265 is formed on the second resin layer 235 and the light emitted from the second resin layer 235 can be uniformed as shown in FIG. For example, when light emitted upward from the second resin layer 235 is concentrated on a specific portion and observed at a high luminance on the screen, a portion of the upper surface of the second resin layer 235 corresponding to the specific portion The second light-shielding pattern 265 can be formed on the backlight unit 200, thereby reducing the brightness of the light in the specific portion, thereby making the brightness of the light emitted from the backlight unit 200 uniform.

The second light-shielding pattern 265 may be made of titanium dioxide (TiO ₂ ). In this case, a part of the light emitted from the second resin layer 235 is reflected downward in the second light-shielding pattern 265, . ≪ / RTI >

8, a pattern may be formed on the reflective layer 240 to facilitate the light emitted from the light source 220 to travel to the adjacent light source 225.

The pattern formed on the upper surface of the reflective layer 240 may include a plurality of protrusions 241. The light incident on the plurality of protrusions 241 after being emitted from the light source 220 may be scattered in the traveling direction It can be refracted.

8, the density of the protrusions 241 formed on the reflection layer 240 may increase as the distance from the light source 220 is increased. Accordingly, it is possible to prevent the brightness of the light emitted upward from the region close to the region remote from the light source 220 from being reduced, thereby maintaining the brightness of the light provided from the backlight unit 200 uniformly.

The protrusions 241 may be formed of the same material as the reflection layer 240. In this case, the protrusions 241 may be formed by processing the upper surface of the reflection layer 240. [

Alternatively, the protrusions 241 may be formed of a material different from the reflective layer 240, and may be formed by printing a pattern as shown in FIG. 8 on the upper surface of the reflective layer 240.

The shape of the protruding portions 241 is not limited to that shown in Fig. 8, and various shapes such as a prism, for example, may be possible.

Figs. 9 to 20 are views for explaining the connector in more detail. Hereinafter, the description of the parts described in detail above will be omitted. For example, the light source described below may be a top view type, or may be a side view type.

Referring to FIGS. 9 and 10, a connector 900 may be disposed on the rear surface of the substrate 210. In addition, a plurality of light sources 220 may be disposed on the front surface of the substrate 210. 9, the light source 220 is indicated by a dotted line because the light source 220 is disposed on the front surface of the substrate 210, so that the light source 220 is not observed in the direction in which the connector 900 is disposed.

The connector 900 may be electrically connected to at least one light source 220 disposed on the front surface of the substrate 210. Accordingly, although not shown, the connector 900 electrically connects an external driving circuit to the light source 220, so that the driving voltage supplied to the driving circuit can be supplied to the light source 220.

In addition, the connector 900 may include a first portion 910, a first electrode 930, and a second portion 920. Here, the first portion 910 may be referred to as a base portion, and may be fixed to the rear surface of the substrate 210. The first electrode 930 may be formed in the first portion 910 and a predetermined cable (not shown) may be connected. The second portion 920 may apply pressure to bring the cable in electrical contact with the first electrode 930. In addition, the cable electrically connected to the first electrode 930 is electrically connected to the external driving circuit, so that the light source 220 and the external driving circuit can be electrically connected to each other.

Fig. 10 illustrates an example of the structure of the connector 900, and is not limited to Fig. 10 of the connector 900 in the present invention. For example, in the present invention, the second portion 920 may be omitted, and a cable not shown may be attached to the first portion 910 by an anisotropic adhesive comprising a conductive ball. In this case, the first electrode 930 of the connector 900 and the cable can be electrically connected by the conductive ball.

11, the connector 900 may be electrically connected to the second electrode 1100 formed on the substrate 210. In addition, A second electrode 1100 is formed on the rear surface of the substrate 210 and a third electrode 940 may be formed on the bottom surface of the first portion 910 of the connector 900, The first electrode 1100 and the third electrode 940 may be electrically connected.

An adhesive layer 1110 is formed between the connector 900 and the rear surface of the substrate 210 to electrically connect the third electrode 940 of the connector 900 and the second electrode 1100 formed on the substrate 210. [ And the adhesive layer 1110 may include the conductive particles 1111. [ Here, the conductive particles 1111 may be a conductive ball, and may include a coating layer formed of a core made of a metallic material such as silver (Ag) or the like and carbon, have.

The third electrode 940 of the connector 900 and the second electrode 1100 formed on the substrate 210 can be electrically connected by the conductive particles 1111 included in the adhesive layer 1110. [

In the connector 900, the first electrode 930 and the third electrode 940 may be connected.

The second electrode 1100 disposed on the rear surface of the substrate 210 may be electrically connected to the light source 220 disposed on the front surface of the substrate 210.

Accordingly, when the cable is connected to the first electrode 930 of the connector 900, the light source 220 disposed on the front surface of the substrate 210 can be electrically connected to the cable.

12, the rear cover 40 may be formed in the hole 1200, and the connector 900 may be disposed in a position corresponding to the hole 1200. FIG. For example, as shown in FIG. 13, the connector 900 disposed on the rear surface of the substrate 210 may be located in the hole 1200 disposed in the rear cover 40. Accordingly, it can be seen that the cable is connected to the connector 900 through the hole 1200.

If the connector 900 is simply disposed between the rear cover 40 and the substrate 210 without forming the hole 1200 in the rear cover 40, the thickness of the backlight unit can be increased.

In addition, when the connector 900 is disposed on the side surface of the substrate 210, the size (width) of the display device can be unnecessarily increased.

On the other hand, when the hole 1200 is formed in the rear cover 40 and the cable is connected to the connector 900 through the hole 1200, the thickness of the backlight unit can be reduced, Can be reduced.

On the other hand, a plurality of connectors 900 can be disposed on one substrate 210. For example, as in the case of FIG. 14, it is possible that the first connector 900A and the second connector 900B are disposed on one substrate 210. FIG. The number of connectors 900 arranged on one substrate 210 is not limited to the case of Fig.

The light source 220 connected to the first connector 900A and the light source 220 connected to the second connector 900B among the plurality of light sources 220 disposed on the substrate 210 may be electrically independent from each other. For example, the light source 220 disposed in the first region 1400 of the plurality of light sources 220 disposed on the substrate 210 is electrically connected to the first connector 900A, and the light source 220 disposed in the second region 1410, The light source 220 disposed in the second connector 900B may be electrically connected to the second connector 900B. Accordingly, the light source 220 disposed in the first region 1400 can be electrically separated from the light source 220 disposed in the second region 1410.

In addition, the first connector 900A and the second connector 900B may be disposed adjacent to each other on the rear surface of the substrate 210. [ That is, the interval L5 between the first connector 900A and the second connector 900B is relatively small.

14, the distance L1 between the first short side SS1 of the substrate 210 and the first connector 900A is shorter than the second short side SS2 of the substrate 210 And the distance L4 between the first connector 900A and the first connector 900A. In this case, the end of the substrate 210 adjacent to the first connector 900A may be the first short side SS1. The distance L2 between the first short side SS1 of the board 210 and the second connector 900B is greater than the distance L3 between the second short side SS2 of the board 210 and the second connector 900B ). In this case, the end of the substrate 210 adjacent to the second connector 900B may be the second short side SS2.

In this case, the interval L5 between the first connector 900A and the second connector 900B is the shortest distance L1 between the first connector 900A and the end SS1 of the adjacent substrate 210, 2 connector 900B and the shortest distance L3 between the ends SS2 of the adjacent substrates 210. [

In other words, assuming that a straight line passing through the first connector 900A and the second connector 900B is a first straight line Line1, the first connector 900A and the second connector 900B on the first straight line Line1, The distance L5 between the first connector 900A and the edge SS1 of the adjacent substrate 210 and the distance L1 between the edge of the substrate 210 adjacent to the second connector 900B SS2) between the first and second electrodes.

The first connector 900A and the second connector 900B may be disposed at positions corresponding to the holes 1200 formed in the rear cover 40. [ That is, as shown in Fig. 15, the first connector 900A and the second connector 900B can be located in the same hole 1200. [

When the plurality of connectors 900A and 900B are positioned in one hole 1200, the number of the holes 1200 can be reduced, thereby further simplifying the manufacturing process. In addition, since the cables can be connected to the respective connectors 900A and 900B through one hole 1200, the connection process of the cables and the connectors 900A and 900B can be further simplified.

An example of a structure in which cables are connected to the first and second connectors 900A and 900B is shown in Fig.

16, a first connector 900A is disposed in the first area 1400 of the substrate 210 and a first driving circuit (not shown) for supplying a driving voltage to the light source 220 disposed in the first area 1400, The first cable 1620 may be disposed between the first connector (DC1, 1640) and the first connector 900A. The first cable 1620 can electrically connect the first driving circuit 1640 and the first connector 900A.

A first transmission line 1600 for transmitting a driving voltage from the first connector 900A to the light source 220 may be formed in the first region 1400 of the substrate 210. [

The driving voltage supplied by the first driving circuit 1640 is applied to the first region 1400 of the substrate 210 via the first cable 1620, the first connector 900A and the first transmission line 1600 (Not shown).

A second connector 900B is disposed in a second region 1410 of the substrate 210 and a second driver circuit DC2 1650 supplies a driving voltage to the light source 220 disposed in the second region 1410. [ The second cable 1630 may be disposed between the first connector 900B and the second connector 900B. The second cable 1630 can electrically connect the second driving circuit 1650 and the second connector 900B.

A second transmission line 1610 for transmitting driving voltage from the second connector 900B to the light source 220 may be formed in the second region 1410 of the substrate 210. [

The driving voltage supplied by the second driving circuit 1650 is applied to the second region 1410 of the substrate 210 via the second cable 1630, the second connector 900B and the second transmission line 1610 (Not shown).

Meanwhile, it is also possible that three or more connectors 900 are formed on one substrate 210. For example, as in the case of Fig. 17, it is possible to arrange a total of four connectors 900A to 900D on the board 210. [ The number of the connectors 900A to 900D arranged on the substrate 210 is not limited thereto.

17, in the case where the substrate 210 is divided into the first region 1700, the second region 1710, the third region 1720 and the fourth region 1730, A third connector 900C is disposed in the third area 1720 and a third connector 900C is disposed in the fourth area 1730. The second connector 900B is disposed in the second area 1710, It is possible that the fourth connector 900D is disposed.

In this case, the intervals of the connectors 900A to 900D may be set differently. For example, the gap L12 between the first connector 900A and the second connector 900B and the gap L13 between the second connector 900B and the third connector 900C may be different from each other.

More specifically, the first connector 900A and the second connector 900B are disposed adjacent to each other, so that the distance L12 between the first connector 900A and the second connector 900B is larger than the distance L12 between the second connector 900B and the second connector 900B. May be smaller than the interval L13 between the third connectors 900C. In this case, the shortest distance L11 between the first connector 900A and the end of the adjacent substrate 210 and the shortest distance L11 + L12 + between the second connector 900B and the end of the substrate 210 adjacent thereto 1 connector 900A) may be smaller than an interval L13 between the second connector 900B and the third connector 900C.

The third connector 900C and the fourth connector 900D are disposed adjacent to each other so that the gap L14 between the third connector 900C and the fourth connector 900D is smaller than the distance L14 between the second connector 900B and the fourth connector 900D. 3 connector 900C, as shown in Fig. In this case, the shortest interval L15 between the fourth connector 900D and the end of the adjacent substrate 210 and the shortest interval L14 + L15 + between the third connector 900C and the end of the substrate 210 adjacent thereto 3 connector 900C) may be smaller than an interval L13 between the second connector 900B and the third connector 900C.

In this case, the first and second connectors 900A and 900B can be spaced relatively far from the third and fourth connectors 900C and 900D. Accordingly, the first and second connectors 900A and 900B can correspond to holes different from the third and fourth connectors 900C and 900D. For example, as shown in Figs. 18 to 19, the first and second connectors 900A and 900B are located in the first hole 1201 formed in the rear cover 40, and the third and fourth connectors 900C and 900D And may be located in the second hole 1202 formed in the rear cover 40.

Since the first and second connectors 900A and 900B are disposed adjacent to each other and the third and fourth connectors 900C and 900D are disposed adjacent to each other, the first and second connectors 900A and 900B are disposed between the first and second holes 1201 and 1202, The distance D1 between the first hole 1201 and the second hole 1202 may be greater than the length W1 of the first hole 1201 and /

Alternatively, it is also possible that the first, second, third and fourth connectors 900A, 900B, 900C and 900D are located in one hole 1200 as shown in Fig. In this case, the length of the hole 1200 may be larger than the interval between the first connector 900A and the fourth connector 900D.

FIGS. 21 to 26 are views for explaining a case where the substrate is divided into a plurality of sub-substrates. Hereinafter, the description of the contents described in detail above will be omitted. For example, one substrate divided into a plurality of sub-substrates can correspond to dividing one substrate into a plurality of regions as in the case of FIG. 14 and / or FIG. In other words, as in the case of FIGS. 14 and 17, dividing one substrate into a plurality of regions does not actually cut the substrate, but its feature is that a plurality of sub- As shown in Fig. In other words, one region of the substrate of Figs. 14 and 17 can be interpreted as one sub-substrate in the following.

Referring to FIG. 21, one substrate 210 can be divided into a plurality of sub-substrates 211 to 214. For example, the substrate 210 may include a first sub-substrate 211, a second sub-substrate 212, a third sub-substrate 213, and a fourth sub-

In this case, as in the case of FIG. 22, after the plurality of light sources 220 are arranged on the first to fourth sub-substrates 211 to 214, the first to fourth sub-substrates 211 to 214 are arranged side by side It is possible to form one substrate 210 by bonding.

In the case where the substrate 210 is divided into a plurality of sub-substrates, if any sub-substrate of the plurality of sub-substrates is defective, only the defective sub-substrate may be replaced and the remaining normal sub-substrate may be continuously used . As a result, material consumption due to defects is reduced, so that the manufacturing cost can be reduced.

As described above, when the substrate 210 is divided into a plurality of sub-substrates, it may be preferable to dispose the connectors on each sub-substrate. 23, the first connector 900A may be disposed on the rear surface of the first sub substrate 211, and the second connector 900B may be disposed on the rear surface of the second sub substrate 212 . As such, it may be desirable to have one connector on each sub-board.

As such, even when the substrate 210 is divided into a plurality of sub-substrates, it may be preferable that the connectors are disposed adjacent to each other. Preferably, the connectors disposed on the two adjacent sub-boards may be disposed at positions corresponding to the same hole. For example, as shown in FIG. 23, the first connector 900A and the second connector 900B are disposed adjacent to each other, so that the interval L24 between the first connector 900A and the second connector 900B is relatively long Can be small.

23, the distance L20 between the first connector 900A and the first side S1 of the first sub-board 211 is larger than the distance L20 between the first connector 900A and the first sub- May be larger than the interval L21 between the first side S1 and the second side S2 facing each other. The gap L23 between the second connector 900B and the third side S3 of the second sub-board 212 is greater than the distance L23 between the second connector 900B and the third sub- (L22) between the first side (S3) and the fourth side (Fourth Side, S4) opposed to each other.

In order to reduce the distance L24 between the first connector 900A and the second connector 900B in this structure, the second side S2 of the first sub-board 211 and the second sub- It may be preferable to dispose the three sides S3 facing each other.

The first connector 900A and the second connector 900B can be positioned together in the hole 1200 formed in the rear cover 40 so that the number of holes formed in the rear cover 1200 can be reduced, The process can be facilitated.

As the distance L24 between the first connector 900A and the second connector 900B decreases, the length L30 of the hole 1200 in which the first connector 900A and the second connector 900B are disposed together ) Can also be shortened. The length L30 of the hole 1200 may be smaller than the width W10 of the first substrate 211 and / or the width W20 of the second substrate 212. [

The interval L24 between the first connector 900A and the second connector 900B is determined by the distance L20 between the first connector 900A and the first side S1 of the first sub- May be smaller than an interval L22 between the second connector 900B and the fourth side S4 of the second sub-board 212. [

On the other hand, the lengths of the transmission lines may be different on different sub-substrates. 24, the length of the transmission line 2400 in the first sub-board 211 may be different from the length of the second transmission line 2410 disposed in the second sub-board 212. For example, For example, the length L40 of the first transmission line 2400 in the width direction of the first sub-board 211 is equal to the length L41 of the second transmission line 2410 in the width direction of the second sub- ).

The reason why the length of the first transmission line 2400 disposed on the first sub-substrate 211 and the length of the second transmission line 2410 disposed on the second sub-substrate 212 are different from each other is as follows .

If the wiring structure of the first transmission line 2400 disposed on the first sub substrate 211 and the wiring structure of the second transmission line 2410 disposed on the second sub substrate 212 are substantially the same It may be difficult to dispose the first connector 900A disposed on the first sub-board 211 and the second connector 900B disposed on the second sub-board 212 adjacent to each other.

The length of the first transmission line 2400 disposed on the first sub-substrate 211 is the same as the length of the second transmission line 2410 disposed on the second sub-substrate 212, In order to dispose the first connector 900A disposed on the first sub-board 211 and the second connector 900B disposed on the second sub-board 212 adjacent to each other, The wiring structure of the second sub-board 212 and the wiring structure of the second transmission line 2410 of the second sub-board 212 should be substantially opposite to each other. In such a case, the manufacturing cost may increase.

24, the length of the first transmission line 2400 disposed on the first sub-substrate 211 and the length of the second transmission line 2410 disposed on the second sub-substrate 212 The wiring structure of the first transmission line 2400 disposed on the first sub substrate 211 and the wiring structure of the second transmission line 2410 disposed on the second sub substrate 212 are substantially the same The first connector 900A disposed on the first sub-board 211 and the second connector 900B disposed on the second sub-board 212 can be positioned adjacent to each other.

24, the position of the second connector 900B on the second sub-substrate 212 moves to the left relative to the first connector 900A on the first sub-board 211, Except that the length L41 of the second transmission line 2410 in the width direction is shorter than the length L40 of the first transmission line 2400 in the width direction of the first sub- The wiring structure of the first transmission line 2400 disposed in the second sub-substrate 211 and the wiring structure of the second transmission line 2410 disposed in the second sub-substrate 212 are substantially the same.

Further, a plurality of transmission lines may be arranged on one sub-substrate. 25, a first transmission line 2400 for electrically connecting the first connector 900A disposed on the first substrate 211 and the light source 220 is connected to the first transmission line 2401, a 1-2 transmission line 2402, a 1-3 transmission line 2403, and a 1-4 transmission line 2404.

The first 1-1 transmission line 2401, the 1-2th transmission line 2402, the 1-3th transmission line 2403, and the 1-4th transmission line 2404, which are disposed on the first substrate 211, May be electrically connected to the light source 220 independently of each other. Accordingly, at least one of the plurality of light sources 220 disposed on one sub-substrate may be electrically driven independently of at least one of the others.

In addition, when each of the transmission lines 2401 to 2404 changes its traveling direction, it is possible to prevent the transmission lines 2401 to 2404 from breaking rapidly by changing the traveling direction at least twice. For example, as shown in the area A1 to A4 in Fig. 25, the transmission lines 2401 to 2404 can be twisted about twice when changing the traveling direction.

In addition, sub-substrates of different types can be arranged alternately. Assuming that the first sub-substrate 211 is the first type sub-substrate (1) and the second sub-substrate 212 is the second type sub-substrate (1) in FIG. 24, , The first type sub substrate (1) and the second sub substrate (212) may be arranged alternately to form one substrate (210).

As described above, it is to be understood that the technical structure of the present invention can be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

It should be understood, therefore, that the embodiments described above are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description, And all changes or modifications derived from equivalents thereof should be construed as being included within the scope of the present invention.

Claims (22)

Board;
A plurality of light sources disposed on a front surface of the substrate; And
A connector disposed on a rear surface of the substrate and electrically connected to at least one light source;
Lt; / RTI >
Wherein the connector includes a first connector and a second connector,
Wherein an interval between the first connector and the second connector is smaller than a shortest distance between an end of the substrate adjacent to the first connector and an end of the substrate adjacent to the second connector,
The first and second connectors may include:
A first portion fixed to the rear surface of the substrate;
An electrode formed on the first portion; And
And a second portion that is in contact with the first portion and is capable of rotating and moving to open and close the electrode. The method according to claim 1,
When a straight line passing through the first connector and the second connector is referred to as a first straight line,
Wherein an interval between the first connector and the second connector on the first straight line is smaller than an interval between an end of the substrate adjacent to the first connector and an end of the substrate adjacent to the second connector, unit. The method according to claim 1,
Wherein the light source connected to the first connector and the light source connected to the second connector are electrically independent from each other. The method according to claim 1,
Wherein an adhesive layer is disposed between the connector and the back surface of the substrate. 5. The method of claim 4,
Wherein the adhesive layer comprises conductive particles. The method according to claim 1,
And the connector electrically connects an external driving circuit to the light source. Board;
A plurality of light sources disposed on a front surface of the substrate; And
A connector disposed on a rear surface of the substrate and electrically connected to at least one light source;
Lt; / RTI >
The connector includes a first connector, a second connector, and a third connector arranged side by side,
The distance between the first connector and the second connector is different from the distance between the second connector and the third connector,
The first, second,
A first portion fixed to the rear surface of the substrate;
An electrode formed on the first portion; And
And a second portion that is in contact with the first portion and is capable of rotating and moving to open and close the electrode. 8. The method of claim 7,
Wherein an interval between the second connector and the third connector is larger than an interval between the first connector and the second connector,
Wherein a shortest distance between an end of the substrate adjacent to the first connector and an end of the substrate adjacent to the second connector is smaller than an interval between the second connector and the third connector. 8. The method of claim 7,
And a fourth connector adjacent to the third connector,
And the interval between the second connector and the third connector is larger than the interval between the third connector and the fourth connector. Board;
A plurality of light sources disposed on a front surface of the substrate;
A plurality of connectors disposed on a rear surface of the substrate and electrically connected to at least one light source, respectively;
A rear cover disposed on a rear surface of the substrate; And
A hole formed in the rear cover;
/ RTI >
At least two of the connectors are disposed at positions corresponding to one of the holes,
Wherein the plurality of connectors include:
A first portion fixed to the rear surface of the substrate;
An electrode formed on the first portion; And
And a second portion that partially contacts the first portion and is capable of opening and closing the electrode by rotational movement. 11. The method of claim 10,
Wherein the connector includes a first connector and a second connector,
Wherein a distance between the first connector and the second connector is smaller than a shortest distance between an end of the substrate adjacent to the first connector and an end of the substrate adjacent to the second connector. 12. The method of claim 11,
Wherein the first connector and the second connector are located in the same hole. Board;
A plurality of light sources disposed on a front surface of the substrate;
A plurality of connectors disposed on a rear surface of the substrate and electrically connected to at least one light source;
A rear cover disposed on a rear surface of the substrate; And
A plurality of holes formed in the rear cover;
/ RTI >
Wherein the connector is disposed at a position corresponding to the hole,
Wherein at least one of the plurality of connectors has a corresponding hole different from the corresponding hole,
Wherein the plurality of connectors include:
A first portion fixed to the rear surface of the substrate;
An electrode formed on the first portion; And
And a second portion that partially contacts the first portion and is capable of opening and closing the electrode by rotational movement. 14. The method of claim 13,
The connector includes a first connector, a second connector, and the third connector arranged side by side,
Wherein an interval between the first connector and the second connector is smaller than an interval between the second connector and the third connector,
Wherein the first connector and the second connector are located in a first hole of the plurality of holes and the third connector is located in a second hole of the plurality of holes. 15. The method of claim 14,
Wherein an interval between the first hole and the second hole is larger than a length of the first hole and / or the second hole. 15. The method of claim 14,
And a fourth connector adjacent to the third connector,
The distance between the third connector and the fourth connector is smaller than the distance between the second connector and the third connector,
And the fourth connector is located in the second hole. Board;
A plurality of light sources disposed on a front surface of the substrate; And
A connector disposed on a rear surface of the substrate and electrically connected to at least one light source;
Lt; / RTI >
Wherein the substrate is divided into a plurality of sub-substrates each of which is provided with at least one light source,
Wherein the connector is disposed on a rear surface of each of the sub-boards,
Wherein the substrate includes a first sub-substrate and a second sub-substrate adjacent to each other,
A first connector is disposed on a rear surface of the first sub substrate, a second connector is disposed on a rear surface of the second sub substrate,
Wherein an interval between the first connector and a first side of the first sub-board is greater than a distance between a first side of the first connector and the second side facing the first side of the first sub- Large,
Wherein an interval between the second connector and a first side of the second sub-board is greater than a distance between a second side of the second connector and the second side facing the first side of the second sub- Small,
The second side of the first sub-substrate and the first side of the second sub-substrate are disposed to face each other,
The first and second connectors may include:
A first portion fixed to the rear surface of the substrate;
An electrode formed on the first portion; And
And a second portion that is in contact with the first portion and is capable of rotating and moving to open and close the electrode. 18. The method of claim 17,
Wherein the spacing between the first connector and the second connector is less than the spacing between the first connector and the first side of the first sub-board and the spacing between the second connector and the second side of the second sub- Backlight unit. 18. The method of claim 17,
When the first sub-substrate is referred to as a first type sub-substrate and the second sub-substrate is referred to as a second type sub-substrate,
Wherein the first type sub substrate and the second type sub substrate are alternately arranged. Board;
A plurality of light sources disposed on a front surface of the substrate;
A connector disposed on a rear surface of the substrate and electrically connected to at least one light source;
A rear cover disposed on a rear surface of the substrate; And
A plurality of holes formed in the rear cover;
/ RTI >
Wherein the substrate is divided into a plurality of sub-substrates each of which is provided with at least one light source,
Wherein the connector is disposed on a rear surface of each of the sub-boards,
The connectors disposed on two adjoining sub-boards are disposed at positions corresponding to the same hole,
Wherein the connector comprises:
A first portion fixed to the rear surface of the substrate;
An electrode formed on the first portion; And
And a second portion that partially contacts the first portion and is capable of opening and closing the electrode by rotational movement. 21. The method of claim 20,
Wherein the substrate includes a first sub-substrate and a second sub-substrate adjacent to each other,
A first connector is disposed on a rear surface of the first sub substrate, a second connector is disposed on a rear surface of the second sub substrate,
Wherein the first connector and the second connector are located in the same hole. 22. The method of claim 21,
And the length of the hole is smaller than the width of the first sub-substrate and / or the second sub-substrate in the longitudinal direction of the hole.

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