KR20180020630A - Backlight unit and liquid Crystal display apparatus including the unit - Google Patents

Abstract

According to an embodiment, a backlight unit comprises: a plurality of light sources; a substrate having the plurality of light sources arranged thereon; a support member configured to support the substrate wherein the support member includes a support part arranged under the substrate and a body part bent and extended from the support unit; at least one heat transfer member arranged on the outside of the body part; and a plurality of heat radiating members arranged at a position which corresponds to a light source on the heat transfer member. Therefore, the backlight unit has excellent reliability and stability.

Description

BACKLIGHT UNIT AND LIQUID CRYSTAL DISPLAY DEVICE INCLUDING THE UNIT

An embodiment relates to a backlight unit and a liquid crystal display device including the unit.

A liquid crystal display (LCD) device refers to a device that displays an image using electrical and optical characteristics of a liquid crystal. Liquid crystal display devices are widely used in portable computers, communication devices, liquid crystal televisions, industrial devices, and aerospace industries because they have the advantage of being very small in volume and light in weight compared to cathode ray tubes (CRT).

Generally, in the case of a liquid crystal display device, when the input current increases, heat is generated. If the generated heat can not be discharged smoothly, the lifetime and luminance of the backlight unit may be lowered. Further, the stability and reliability of the liquid crystal display device may be deteriorated .

In the conventional case, a blowing fan or the like was used to discharge the heat generated in the backlight unit to the outside. Therefore, not only must the blower fan be formed, but also an error path through which the air flows to dissipate heat must also be formed in the case. Therefore, the structure of the case is complicated, the volume is increased, and the manufacturing cost is increased.

1. Korean Patent Registration No. (10-1445150), entitled "Cooling Structure of LCD Panel" 2. Korean Patent Publication No. 10-2011-0016294, entitled "Heat Dissipation Structure of LCD Device"

The embodiment provides a backlight unit having excellent reliability and stability since it has a simple structure and improved heat dissipation efficiency and a liquid crystal display device including the unit.

A backlight unit according to an embodiment includes a plurality of light sources; A substrate on which the plurality of light sources are disposed; And a support member for supporting the substrate, the support member comprising: a support disposed below the substrate; And at least one heat transfer member disposed on an outer side of the body portion, the heat transfer member including a body portion bent and extended from the support portion; And a plurality of radiation members disposed on the heat transfer member at positions corresponding to the light sources.

For example, at least a part of the plurality of heat radiating members may be disposed apart from each other, the heat radiating member may connect the heat transfer member, and the heat transfer member may include a plurality of heat transfer members spaced from each other.

For example, at least some of the heat transfer member, the light source, and at least some of the plurality of heat radiation members may overlap in the thickness direction of the body portion.

For example, the heat transfer member may be disposed adjacent to a portion bent from the support portion to the body portion.

For example, the heat dissipating member may be a metal material including Al, Cu, and a zinc alloy, or a ceramic (Al ₂ O _{3 )} material.

For example, the heat dissipating member may include a coating layer, and the coating layer may be formed of a material selected from the group consisting of silicon oxide, alumina (Al ₂ O ₃ ), zirconia (ZrO), silicon carbide (SiC), titanium carbide At least one or more materials selected from the group consisting of at least one ceramic material selected from the group consisting of ridonium (SiN) and aluminum nitride (AlN), an organic material, and an inorganic material.

For example, the surface of at least one of the heat dissipation members may include a roughness having heat radiation. The roughness may have a heat radiation pattern in which the acid (P) and the valleys (V) are repeated. The height of the mountain P is 2 mm to 3 mm, and the width of the valley V may be 1 mm to 3 mm.

For example, the heat transfer member may include a vessel, a wick, and a vapor space. The heat transfer member may be a heat pipe. The container includes a cylindrical shape and may be a material comprising aluminum, stainless steel, and carbon steel. The wick may have a capillary operating principle.

For example, the backlight unit may further include a connection member disposed between the outside of the body portion and the heat transfer member, and having adhesiveness and thermal conductivity.

For example, the support member may be integral or detachable.

For example, the backlight unit may further include an auxiliary radiation member on an outer side of the support member bent in the body from the support member when the support member is integral.

For example, the support member may be a metal material comprising aluminum.

For example, the backlight unit may further include a driving circuit portion disposed in a driving region outside the body portion. The heat transfer member and the heat radiation member may be disposed around the driving circuit portion.

For example, the backlight unit may further include a groove for receiving the heat transfer member on an outer side of the body portion. The heat dissipating member may be received in the groove together with the heat transfer member.

A liquid crystal display device according to another embodiment includes a device panel; A backlight unit according to claim 1 disposed on a back surface of the device panel; And a case enclosing the device panel and the backlight unit.

The backlight unit according to the embodiment and the liquid crystal display device including the unit have advantages in that the increase in the volume occupied by the structure for heat dissipation is small, the heat dissipation speed is high, the manufacturing cost is low, the heat dissipation efficiency is maximized, Increases brightness, provides excellent stability and reliability, and has a high heat dissipation rate.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a top perspective view of a backlight unit according to an embodiment. FIG.
Fig. 2 is an exploded top perspective view of the backlight unit shown in Fig. 1. Fig.
Fig. 3 shows a partial cross-sectional view of the backlight unit shown in Fig.
Fig. 4 shows an example of a rear perspective view of the backlight unit shown in Fig.
Fig. 5 shows another example of a rear perspective view of the backlight unit shown in Fig.
6A to 6C show various embodiments of the light source module.
7 is a partial perspective view of an embodiment of the 'A' portion shown in FIG.
8A and 8B are enlarged cross-sectional views according to the embodiment of the portion 'B' shown in FIG.
9A and 9B show a cross-sectional view and a side view, respectively, of an embodiment of a heat-conducting member.
Figure 10 shows the back side of the body part in the support member.
11A and 11B show a perspective view of an embodiment of a body part or a heat radiation member.
12 shows a perspective view of another embodiment of the heat dissipating member shown in Figs. 1 to 4 and Fig. 8A.
13 shows an external perspective view of a backlight unit according to another embodiment.
14 is a cross-sectional view of another embodiment of a backlight unit. Fig.
Figs. 15A and 15B are respectively a combined and disassembled sectional view of an embodiment in which the second connecting member, the second heat transfer member, the first and second heat dissipating members shown in Fig. 14 are arranged on the back side of the body portion.
Fig. 16 is an assembled cross-sectional view according to another embodiment in which the second connecting member, the second heat transfer member, and the first and second heat dissipating members shown in Fig. 14 are disposed on the back surface of the body portion.
17A and 17B are rear views of a backlight unit in which a heat transfer member and a heat radiation member are arranged according to still another embodiment.
18A and 18B show a rear view of a backlight unit in which a heat transfer member and a heat radiation member are arranged according to another embodiment.
Fig. 19 shows the back surface of the body portion in which the driving circuit portion is disposed.
20A is a view showing heat dissipation of a body portion where a heat transfer member is not disposed.
20B is a view showing heat dissipation of the body portion in which the heat transfer member is disposed.
21 is an exploded perspective view of the liquid crystal display device according to the embodiment.
22 is a view exemplarily showing an appearance of a display unit for a vehicle according to an embodiment including a liquid crystal display device.
23 shows a schematic block diagram of a vehicle display unit according to the embodiment.
FIG. 24 shows a block diagram according to an embodiment of the CID shown in FIG. 23. FIG.
25 is a diagram showing the appearance of the video display device according to the embodiment.
26 is an internal block diagram of the video display device shown in Fig.

 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate understanding of the present invention. However, the embodiments according to the present invention can be modified into various other forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. Embodiments of the invention are provided to more fully describe the present invention to those skilled in the art.

In the description of the present embodiment, in the case of being described as being formed "on or under" of each element, the upper (upper) or lower (lower) on or under includes both the two elements being directly in contact with each other or one or more other elements being indirectly formed between the two elements.

Also, when expressed as "on" or "on or under", it may include not only an upward direction but also a downward direction with respect to one element.

It is also to be understood that the terms "first" and "second," "upper / upper / upper," and "lower / lower / lower" But may be used to distinguish one entity or element from another entity or element, without necessarily requiring or implying an order.

Hereinafter, a liquid crystal display device 100 (100A to 100E) according to an embodiment will be described with reference to the accompanying drawings.

Although the liquid crystal display device 100 (100A to 100E) according to the embodiment is described using a Cartesian coordinate system, it is needless to say that it can be explained using another coordinate system. In the Cartesian coordinate system, the x-axis, the y-axis and the z-axis shown in each figure are orthogonal to each other, but the embodiment is not limited thereto. The x-axis, the y-axis, and the z-axis may intersect with each other.

1 is a top perspective view of a backlight unit (BLU) 100A according to an embodiment. FIG. 2 is a perspective exploded view of an exploded top view of the backlight unit 100A shown in FIG. 1. FIG. 1 and FIG. 4 and FIG. 5 are rear perspective views of the backlight unit 100A shown in FIG. 1. FIG. 4A is a partial sectional view of the backlight unit 100A shown in FIG.

The first connecting members 162-1 and 162-2 are omitted in Fig. 1, Fig. 4 shows only the supporting member 148 and the heat transfer members 180-11 and 180-12, 5 shows only the support member 148, the heat transfer members 180-11 and 180-12 and the plurality of heat radiation members 150-10, 150-21 and 150-22.

1 to 5, a backlight unit 100A according to an exemplary embodiment includes a light source module LM, a support member 148, at least one heat transfer member 180-11 and 180-12, Member 150-10, 150-21, 150-22.

The light source module LM serves to generate light and may include at least one light source 144, a substrate 142, and a first connection member 146. [

The light source 144 may be disposed on the substrate 142 to generate light. In addition, the light source 144 may be thermally coupled to the substrate 142. Since the light source 144 is thermally connected to the substrate 142, the heat generated from the light source 144 can be transmitted to the substrate 142.

The light sources 144 may be disposed on the substrate 142 and may include a plurality of light sources arrayed on the substrate 142. The light source 144 may be a top view type light emitting diode. In some cases, the light source 144 may be a side view type light emitting diode.

As described above, the light source 144 may be a light emitting diode chip, and the light emitting diode chip may be a blue LED chip or an ultraviolet LED chip, or may be a red LED chip, a green LED chip, a blue LED chip, green LED chips, and white LED chips.

Here, the white LED may be realized by combining a yellow phosphor on a blue LED or using a red phosphor and a green phosphor on a blue LED at the same time, and a yellow phosphorescent phosphor (Yellow phosphor), Red phosphor (Phosphor) and Green phosphor (Phosphor).

The substrate 142 serves to support at least one light source 144, and an electrode pattern for connecting the adapter for supplying power and the light source 144 may be formed. For example, an electrode pattern for connecting the light source 144 and the adapter may be formed on the upper surface of the substrate 142. The substrate 142 may be a printed circuit board (PCB) substrate made of any one material selected from the group consisting of polyethylene terephthalate (PET), glass, polycarbonate (PC), and silicon (Si) .

The substrate 142 may be a single layer PCB, a multi-layer PCB, a ceramic substrate, a metal-core PCB, or the like.

In the light source module LM, the light source 144 and the substrate 142 may be arranged in various forms. Hereinafter, various forms of the light source module LM will be described with reference to FIGS. 6A to 6C.

6A to 6C show various embodiments of the light source module LM. The first connection member 146 may be disposed between the substrate 142-1 and the support portion 148-1 although the illustration of the first connection member 146 is omitted in Figures 6A to 6C .

6A, the light source module LM is a 1-edge type in which the light source 144 is arranged in an array shape on only one edge of the four edges of the support member 148, (142-1).

Alternatively, as illustrated in FIG. 6B or 6C, the plurality of light sources 144 may be disposed at the opposite edges of the edge of the support member 148.

For example, as illustrated in FIG. 6B, the light source module LM is a two-edge type in which light sources 144 and substrates 142-1 and 142-2 May be disposed. In the case of FIG. 6B, the light source 144 and the substrates 142-1 and 142-2 are arranged at the edge facing the z-axis direction of the edge of the support member 148, respectively. However, It is not limited. That is, unlike the illustrated embodiment, the light source 144 and the substrates 142-1 and 142-2 may be disposed at the edge facing the x-axis direction of the edge of the support member 148, respectively.

Alternatively, as illustrated in FIG. 6C, the light source module LM is a four-edge type, in which light sources 144 and substrates 142-1, 142-2, 142 -3, and 142-4 may be disposed.

Figure 3 is a schematic diagram of a backlight unit (LM) when the light source module LM is a 1-edge type as illustrated in Figure 6a, or a 2-edge type as illustrated in Figure 6b, or a 4-edge type as illustrated in Figure 6c. 100A. ≪ / RTI > Accordingly, the substrate 142 and the light source 144 shown in FIG. 3 may correspond to the substrate 142-1 and the light source 144 shown in FIGS. 6A to 6C, respectively.

The first connection member 146 is disposed between the substrate 142 and a support portion 148-1 described below and serves to bond the substrate 142 and the support portion 148-1 to each other. The first connection member 146 may also transfer the heat transferred from the light source 144 to the substrate 142 to the support 148-1.

In order to perform the above-described role, the first connecting member 146 may be realized with a material having adhesiveness and heat transferability.

The greater the first thickness T1 of the first connection member 146, the more the heat transfer from the substrate 142 to the support 148-1 can be achieved. For example, the first thickness T1 may be 0.5 mm, but the embodiment is not limited thereto.

Meanwhile, the support member 148 may include a support portion 148-1 and a body portion 148-2. In Fig. 3, the support portion 148-1 is hatched to distinguish the support portion 148-1 from the body portion 148-2. Hereinafter, it is described that the hatched portion B 'bent from the support portion 148-1 to the body portion 148-2 belongs to the support portion 148-1, but this portion' B ' 148-2), the following description may be applied.

The support portion 148-1 may be disposed under the light source module LM and may have a shape extending in the y-axis direction. The light source module LM is disposed and supported on the support 148-1. That is, the support 148-1 serves to support the light source 144 and the substrate 142.

Referring to FIG. 3, the support 148-1 may include a top surface TS, a bottom surface BS, first and second sides SS1 and SS2. The upper surface TS corresponds to the surface on which the light source module LM is disposed. When the support 148-1 is thermally connected to the substrate 142 by the first connection member 146, the upper surface TS corresponds to the surface on which the first connection member 146 is disposed. The lower surface BS corresponds to the opposite side of the upper surface TS. The first and second sides SS1 and SS2 refer to the surfaces disposed between the top surface TS and the bottom surface BS. The second side SS2 means the opposite side of the first side SS1.

The body portion 148-2 may have a bent shape extending from the support portion 148-1. For example, the body portion 148-2 may have a shape curved in the z-axis direction from the support portion 148-1. The body portion 148-2 serves to support the heat transfer members 180-11 and 180-12 and the plurality of heat dissipation members 150-10, 150-21 and 150-22 described later.

The support part 148-1 and the body part 148-2 serve not only to support the light source module LM and the heat transfer members 180-11 and 180-12 but also to support the light source module LM And can also transfer heat to the heat transfer members 180-11 and 180-12. To this end, the support member 148 may have thermal conductivity, and the support portion 148-1 and the body portion 148-2 also have thermal conductivity. To this end, the support member 148 may be embodied as a material having thermal conductivity. For example, each of the support portion 148-1 and the body portion 148-2 may be made of a metal material such as Al and a material having excellent heat radiation characteristics.

The support part 148-1 is indirectly contacted with the light source module LM corresponding to the heat source via the first connection member 146 or directly with the light source module LM without passing through the first connection member 146. [ The support portion 148-1 can be thermally connected to the light source module LM.

In the light source module LM, the substrate 142 is thermally connected to the light source 144, and the substrate 142 is thermally connected to the support 148-1 through the first connection member 146. [ Thus, the support 148-1 may be thermally connected to the light source 144, which is a heat source, via the substrate 142 and the first connection member 146. That is, the support portion 148-1 receives the heat generated from the light source 144 through the substrate 142 and the first connection member 146, transfers the heat to the body portion 148-2, -2 can transfer heat to the heat transfer members 180-11, 180-12 disposed on its outer side (or the back side) 140BP. That is, the body part 148-2 mediates the heat transfer between the support part 148-1 and the heat transfer members 180-11 and 180-12.

In addition, the support portions 148-1 and 148-2 may be integrally formed as illustrated in FIGS. 1 to 5, or may be separate from the illustrated structure.

On the other hand, the heat transfer members 180-11 and 180-12 may be disposed on the outer side (or the back side) of the body portion 148-2. That is, the heat transfer members 180-11 and 180-12 are disposed on the opposite rear surface 140BP of the light source module LM of the body part 148-2 and are fastened to the body part 148-2, , Touched, fixed, temporarily fixed, supported or coupled.

The second connection members 162-1 and 162-2 are disposed between the outer side (or the back side) 140BP of the body portion 148-2 and the heat transfer members 180-11 and 180-12, (180-11, 180-12) to the body portion 148-2.

The second connection members 162-1 and 162-2 are connected to the first connection member 146 from the light source module LM and the heat transmitted through the support portion 148-1 and the body portion 148-2 To the heat transfer members 180-11 and 180-12. To this end, the second connection members 162-1 and 162-2 may be formed of a material having both adhesiveness and thermal conductivity. In addition, since the body portion 148-2 is thermally connected to the heat transfer members 180-11, 180-12, the body portion 148-2 and the heat transfer members 180-11, Can be contacted.

For example, each of the first and second connecting members 146, 162-1 and 162-2 may be embodied as silver (Ag) or copper (Cu) or a combination thereof, but embodiments are not limited thereto .

The heat transfer members 180-11 and 180-12 are connected to the heat dissipating members 150-10, 150-21 and 150-22 and serve to transmit heat. For example, the heat transfer members 180-11 and 180-12 may be heat pipes However, the embodiment is not limited to this.

Therefore, the heat transfer members 180-11 and 180-12 heat the heat generated from the light source module LM and transmitted from the body portion 148-2 through the support portion 148-1 to the plurality of heat radiation members 150-10 , 150-21, 150-22). For this purpose, the heat transfer members 180-11 and 180-12 may be thermally connected to the body portion 148-2 and the plurality of heat dissipation members 150-10, 150-21, and 150-22. Therefore, the heat dissipating members 150-10, 150-21, and 150-22 described later can heat the heat generated from the light source 144 through the body portion 148-2 and the heat transfer members 180-11 and 180-12 It can be delivered to the outside.

1 to 5, two first and second heat transfer members 180-11 and 180-12 are shown, but the embodiment is not limited thereto. That is, according to another embodiment, the number of heat transfer members may be one or more than two. The number of the first connection members 162-1 and 162-2 may be the same as the number of the heat transfer members 180-11 and 180-12.

In addition, the first heat transfer member 180-11 and the second heat transfer member 180-12 may be disposed apart from each other. For example, as illustrated in FIGS. 4 and 5, the first heat transfer member 180-11 and the second heat transfer member 180-12 may be spaced apart from each other by a predetermined gap g, Is not limited to this. That is, according to another embodiment, unlike the example illustrated in FIG. 4, the first heat transfer member 180-11 and the second heat transfer member 180-12 may be disposed in contact with each other. For the sake of understanding, in FIG. 5, the first and second heat transfer members 180-11 and 180-12 covered by the heat dissipating member 150-10 are indicated by dotted lines.

If the first and second heat transfer members 180-11 and 180-12 are not in contact with each other and are disposed apart from each other as illustrated in FIG. 4, the heat transfer rate can be relatively increased.

7 is a partial perspective view of an embodiment of the 'A' portion shown in FIG.

According to one embodiment, as illustrated in FIG. 1, the 'A' portion of the heat transfer members 180-11 and 180-12 may be in a bent 'L' shape. According to another embodiment, the edges of the heat transfer members 180-11, 180-12 may have a chamfered shape as illustrated in FIG. However, the embodiment is not limited to the specific shape of the heat conducting members 180-11, 180-12.

As shown in FIG. 1, the edges of the heat conducting members 180-11 and 180-12 are formed in the corner of the heat conducting members 180-11 and 180-12 as shown in FIG. 7, The heat transfer path between the heat transfer member 180-11 and the friction members 150-21 and 150-22 connected to each other is shortened so that the plurality of heat radiation members 150-10, -22) can be realized more quickly.

8A and 8B are enlarged cross-sectional views of embodiments B 1 and B 2 of the portion 'B' shown in FIG. 3.

On the other hand, the heat transfer members 180-11 and 180-12 are formed on the outer side (or the back side) 140BP of the body part 148-2 as well as on the first side of the supporting part 148-1 Lt; RTI ID = 0.0 > SS1. ≪ / RTI >

The heat transfer members 180-11 and 180-12 are adjacent to the portion bent from the support portion 148-1 to the body portion 148-2 (for example, EA shown in Figs. 8A and 8B, respectively) . The area where the heat is most concentrated in the support member 148 is the area EA to be bent. Therefore, when the heat transfer members 180-11 and 180-12 are disposed adjacent to the region EA, the heat emission efficiency can be further maximized.

Hereinafter, one example of heat transfer members 180-11 and 180-12 implemented with heat pipes will be described with reference to Figs. 9A and 9B, but the embodiments are not limited thereto. That is, it goes without saying that the heat transfer members 180-11 and 180-12 may also be realized by a heat pipe having a configuration different from that shown in Figs. 9A and 9B.

9A and 9B show a cross-sectional view and a side view, respectively, of an embodiment 180 of a heat transfer member 180-11, 180-12.

The heat transfer member 180 shown in Figs. 9A and 9B is a kind of heat pipe, and may include a container 182, a wick 184, and a vapor space 186.

The heat transfer member 180 includes an evaporation portion P1 for absorbing the heat energy HS1 and HS2 transferred from the light source module LM in which the working medium is a heat source by the support member 148 in the direction of the arrow, And a condensing part P3 for condensing the vapor as the working fluid and discharging heat energy HE1 and HE2 in the direction of the arrow.

The vessel 182 may be generally cylindrical in shape, free of leakage, and pressure proof. For example, the material of the container 182 may be aluminum, stainless steel, carbon steel, or the like.

As the wick 184, a porous material such as a mesh, foaming agent, felt, fiber, sintered metal or the like and a plate having a groove on the pipe wall surface can be used. The working medium can be returned from the condensing section P3 to the evaporating section P1 by the capillary action of the wick 184. That is, the wick 184 functions to return the working medium from the condensing portion P3 to the evaporating portion P1 by capillary action. That is, the wick 184 is a portion where the liquid is refluxed. HCFC-22 (-40 ° C to 30 ° C), HCFC-123 (0 ° C to 100 ° C) and HCFC-134a (-30 ° C to 60 ° C) may be used as the working medium.

The operation principle of the heat transfer member 180 is as follows.

When the evaporator P1 is heated by the support member 148, the temperature of the working fluid rises. As the temperature of the fluid rises, evaporation is promoted until the saturated vapor pressure is reached, and latent heat is given to the vapor. At this time, the saturated vapor pressure increases with the rise of the temperature of the liquid, so that the vapor moves from the evaporation portion P1 to the condensation portion P3 through the vapor space 186. [ Thereafter, the steam is condensed in the condensing section P3, and the latent heat of condensation is released. The heat released is discharged to the heat absorbing source through the wall and the wick 184. The condensed liquid is returned to evaporation portion P1 by capillary action through wick 184 to complete the circulation cycle.

On the other hand, the heat transfer members 180-11 and 180-12 are disposed on the outer side of the body part 148-2 (or hereinafter referred to as a 'back side') according to the positions where the light sources 144 are arranged in the light source module LM . That is, the heat transfer members 180-11 and 180-12 and the light source module LM may be disposed facing each other with the body part 148-2 therebetween. The heat generated in the light source module LM can be rapidly transferred to the heat transfer members 180-11 and 180-12 via the body portion 148-2 so that the heat radiation rate can be improved .

10 shows the back surface of the body portion 148-2 in the support member 148. Fig.

When the substrate 142-1 and the light source 144 of the light source module LM in the support member 148 are arranged in a one-edge type as illustrated in Fig. 6A, the heat transfer members 180-11, 180-12 May be disposed in the lower rear area AR1 from the back surface of the body part 148-2 shown in Fig. That is, the lower rear area AR1 in which the heat transfer members 180-11 and 180-12 are disposed is divided into a 1-edge type light source module LM and a heat transfer member 180- 11, and 180-12 can face each other. 1 to 5, the heat transfer members 180-11 and 180-12 are disposed in the lower rear area AR1 shown in FIG. However, the embodiment is not limited to this.

Alternatively, when the substrates 142-1 and 142-2 of the light source module LM and the light source 144 are arranged in a two-edge type as illustrated in FIG. 6B, the heat transfer members 180-11 and 180-12 May be disposed on at least one of the lower rear area AR1 or the upper rear area AR2 at the rear surface of the body part 148-2 shown in Fig. That is, the lower rear area AR1 and the upper rear area AR1 and AR2, in which the heat transfer members 180-11 and 180-12 can be disposed, The light source module LM and the heat transfer members 180-11 and 180-12 can face each other.

Alternatively, when the substrates 142-1, 142-2, 142-3, and 142-3 of the light source module LM and the light source 144 are arranged in a four-edge type as illustrated in Fig. 6C, The upper rear area AR2, the left rear area AR3, or the right rear area AR1, the left rear area AR2, the right rear area AR2, AR4. ≪ / RTI > That is, each of the lower rear area AR1, the upper rear area AR2, the left rear area AR3, and the right rear area AR4, to which the heat transfer members 180-11 and 180-12 can be disposed, Edge type light source module LM and the heat transfer members 180-11 and 180-12 can face each other with the light sources 148-1 and 148-2 interposed therebetween.

The heat transfer members 180-11 and 180-12 may be disposed side by side with the light source 144 in the direction in which the plurality of light sources 144 are arranged with the body part 148-2 therebetween. For example, referring to FIGS. 1 to 5, since the light sources 144 are arranged in the x-axis direction, the heat transfer members 180-11 and 180-12 are also extended in the x-axis direction.

As described above, the heat transfer members 180-11 and 180-12 and the light source module LM, that is, the plurality of light sources 144 are arranged in the same direction (for example, x Axial direction), the radiation efficiency can be further improved.

1, a central axis CX passing through the center C of the body portion 148-2 in the minor axis direction (e.g., the z axis direction) of the body portion 148-2 is defined as The first and second heat transfer members 180-11 and 180-12 may be arranged symmetrically with respect to each other in the x-axis direction, but the embodiments are not limited thereto. That is, according to another embodiment, the first and second heat transfer members 180-11 and 180-12 may have an asymmetric shape in the x-axis direction with respect to the central axis CX.

Meanwhile, the plurality of heat dissipating members shown in FIG. 1 may be disposed on the heat transfer members 180-11 and 180-12 at positions corresponding to the light sources 144. FIG. 3, at least some (e.g., 150-12) of the heat transfer members, the light source 144, and at least some of the plurality of heat dissipation members (e.g., 150-10, 150-22) 148-2 in the thickness direction (for example, in the y-axis direction).

Also, the plurality of heat dissipation members may include the first heat dissipation member 150-10 and the second heat dissipation members 150-21 and 150-22. The second heat-radiating member may include the second-first and second-heat-radiating members 150-21 and 150-22.

The first heat radiation member 150-10 is disposed on one side of the rear surface of the body portion 148-2 via the first and second heat transfer members 180-11 and 180-12, The first heat transfer member 150-21 is disposed on the other side of the back surface of the body portion 148-2 via the first heat transfer member 180-11 and the second heat dissipation member 150-22 is disposed on the second heat transfer member 180-12 to the other side of the back surface of the body portion 148-2.

For example, as illustrated in FIGS. 1 to 5, one side of the body portion 148-2 in which the first heat radiation member 150-10 is disposed corresponds to a lower portion of the rear surface of the body portion 148-2 And the other side of the body portion 148-2 in which the second heat radiation members 150-21 and 150-22 are disposed may correspond to a side portion of the back surface of the body portion 148-2.

The plurality of heat dissipating members (150-10, 150-21, 150-22) may be connected to each other by heat transfer members (180-11, 180-12). For example, the first and second heat dissipating members 150-10 and 150-21 are connected to each other by the first heat transfer member 180-11, and the first and second heat dissipating members 150- 10 and 150-22 may be connected to each other by the second heat transfer member 180-12.

1, a central axis CX passing through the center C of the body portion 148-2 in the minor axis direction (e.g., the z axis direction) of the body portion 148-2 is defined as As a standard, the 2-1 and 2-2 heat dissipating members 150-21 and 150-22 may be arranged symmetrically with respect to each other in the x-axis direction, but the embodiments are not limited thereto. That is, according to another embodiment, the second-first and second-second radiating members 150-21 and 150-22 may have a shape that is asymmetrical with respect to the x-axis direction with respect to the center axis CX.

1 to 5, a plurality of heat radiation members 150-10, 150-21, and 150-22 are formed on the outer surface of the heat transfer members 180-11 and 180-12, As shown in FIG. That is, the heat radiation members 150-10, 150-21, and 150-22 are disposed on the back surface 140BP of the body portion 148-2 via the heat transfer members 180-11 and 180-12. same. In this case, the heat radiation members 150-10, 150-21, and 150-22 are not directly thermally connected to the back surface 140BP of the body portion 148-2, but are connected to the heat transfer members 180-11 and 180-12 Can be indirectly connected thermally. However, the embodiment is not limited to this.

 According to another embodiment, in addition to the heat radiation members 150-10, 150-21 and 150-22 disposed on the outer surfaces of the heat transfer members 180-11 and 180-12, -1).

That is, when the support portion 148-1 and the body portion 148-2 are integrally formed, the support portion 148-1 is bent in the direction from the support portion 148-1 to the body portion 148-2, A heat radiation member can be further disposed.

For example, as shown in FIGS. 8A and 8B, auxiliary heat-radiating members 152A and 152B are disposed in an area EA where the lower surface BS of the support 148-1 and the first side SS1 are in contact with each other . Since this region EA is the region where heat is most concentrated as described above, when the auxiliary radiation members 152A and 152B are additionally disposed in this region EA, the heat emission efficiency can be further maximized.

For example, in FIG. 8A and FIG. 8B, an area EA where the lower surface BS of the support 148-1 and the first side SS1 are in contact may have a curved shape. In this case, the auxiliary radiation members 152A and 152B may be arranged in a curved cross-sectional shape in the curved area EA.

In FIGS. 8A and 8B, the auxiliary radiation members 152A and 152B may be bonded to the area EA by the third connection member 164. The third connection member 164 serves as a kind of adhesive for connecting the auxiliary radiation members 152A and 152B to the support portion 148-1 and a heat radiation function for dissipating heat transferred from the support portion 148-1 to the outside do.

Each of the radiation members 150-10, 150-21 and 150-22 and the auxiliary radiation members 152A and 152B may be made of a material having excellent heat radiation properties. For example, the body of each of the heat dissipating members 150-10, 150-21, 150-22 and the auxiliary heat dissipating members 152A, 152B may be a metal (e.g., Al, Cu or a zinc alloy) For example, Al ₂ O ₃ ), but the embodiment is not limited thereto.

When the substrate 142 and the supporting portion 148-1 are connected (or adhered) to each other by the first connecting member 146, the second connecting members 162-1 and 162-2, The auxiliary connecting members 164A and 152B are separated from the supporting portion 148-1 by the third connecting member 164 when the auxiliary connecting members 180-11 and 180-12 are bonded to the back surface of the body portion 148-2. The first, second, and third connection members 146, 162-1, 162-2, and 164 need to have no air gaps so that heat radiation efficiency can be improved. In order to solve this problem, the first to third connecting members 146, 162-1, 162-2, and 164 may be omitted. For example, the substrate 142 and the support 148-1 may be integrally formed to eliminate the need for the first connection member 146, and thus the generation of an air gap may be fundamentally eliminated.

Alternatively, the substrate 142 and the support 148-1 may be mechanically engaged and connected to each other, and the heat transfer members 180-11 and 180-12 and the body 148-2 may be engaged with each other, 148-1 and the auxiliary heat-radiating members 152A, 152B may be mechanically engaged and connected to each other, but the embodiments are not limited thereto.

And may be made of the same or different materials as the first to third connecting members 146, 162-1, 162-2, and 164 described above.

1 to 5, the heat transfer members 180-11 and 180-12 are disposed between the back surface of the body portion 148-2 and the heat dissipating members 150-10, 150-21, and 150-22 However, the embodiments are not limited thereto. That is, according to another embodiment, the heat dissipating members 150-10, 150-21, and 150-22 are disposed between the back surface 140BP of the body portion 148-2 and the heat transfer members 180-11 and 180-12 .

11A and 11B are perspective views of embodiments 170A and 170B of the body portion 148-2 or the heat radiation members 150-10, 150-21 and 150-21.

According to one embodiment, as illustrated in FIG. 11A, at least one of the heat radiating member or body portion 170A may include a coating layer 174. For ease of understanding, in FIG. 11A, the circular dotted line is a view showing the coating layer 174 peeled off from the upper edge of the heat dissipating member or the body portion 170A.

The coating layer 174 may be coated on the surface of the body of the heat dissipating member (or the body of the body portion) 172. In the case of FIG. 11A, the entire body 172 is illustrated as coated with the coating layer 174, but the embodiment is not limited thereto. According to another embodiment, the coating layer 174 may be coated on the entire surface of the body 172 only on the surface in contact with air.

The coating layer 174 may be formed of a material having excellent heat radiation properties. For example, the coating layer 174 may be a black insulating coating layer, but embodiments are not limited thereto. For example, the coating layer 174 may comprise at least one of silicon oxide, alumina (Al ₂ O ₃ ), zirconia (ZrO), silicon carbide (SiC), titanium carbide (TiC), silicon nitride And at least one material selected from the group consisting of an organic material and an inorganic material, at least one or more ceramic materials selected from the group consisting of Al2O3, Al2O3, and AlN.

When the heat radiating coating layer 174 is disposed on the body 172 of the heat radiating members 150-10, 150-21, 150-22 or the body part 148-2, the heat radiating members 150-10 , 150-21, 150-22) or the body part 148-2 can be further improved.

According to another embodiment, at least one surface of the heat radiating member (150-10, 150-21, 150-22) or the body portion (148-2) may have a roughness R ). When the roughness R is formed on the body 172 of the heat radiating members 150-10, 150-21, 150-22 or the body part 148-2, the heat radiating members 150-10, 150 -21, 150-22) or the body part 148-2 (170B) may change to black.

When the roughness R is formed in the body 172 as described above, the radiation efficiency of the radiation members 150-10, 150-21, 150-22, or the body portion 148-2 can be further improved.

12 shows a perspective view of another embodiment 150C of the heat dissipating members 150-10, 150-21, 150-22 and the auxiliary heat dissipating member 152A shown in Figs. 1 to 4 and 8A.

The surfaces of the radiation members 150-10, 150-21 and 150-22 or the auxiliary radiation members 152B shown in Figs. 1 to 4 and 8B, which are in contact with air, are flat, but the embodiments are not limited thereto . The radiation efficiency of the heat radiation member 150C and the auxiliary radiation member 152A increases as the surface area of the radiation member 150-10, 150-21, 150-22 and the auxiliary radiation member 152B becomes larger, can do. To this end, each of the heat radiating member 150C and the auxiliary heat radiating member 152A may include a heat radiating pattern. For example, such a heat radiation pattern may be formed on the surface 150-2 in contact with air in the heat radiation member 150C and the auxiliary heat radiation member 152A, respectively.

For example, as illustrated in Figs. 8A and 12, the heat radiation pattern may be in the form of a gear in which the acid P and the valley V are repeated, but the embodiment is not limited thereto.

The heat dissipating body 150 is formed to have a sufficient thickness so as to have the heat dissipating member 150C and the auxiliary heat dissipating member 152A each having a heat radiating pattern in order to form the mountain P and the valley V on the heat dissipating body 150 . For example, the second or third thickness T2, T3 of the heat dissipating body 150 in each of the heat dissipating member 150C and the auxiliary heat dissipating member 152A may be 5 mm or less, but the embodiments are not limited thereto.

The acid P and the rib V that increase the surface area of the surface (for example, 150-2) in contact with air in each of the heat radiation member 150C and the auxiliary radiation member 152A may have various sizes . 12, the height of the mountain P (i.e., the depth of the valley V) may be between 2 mm and 3 mm, and the first width W1 of the mountain V and the height V may each be between 1 mm and 3 mm, for example, 2 mm, although embodiments are not limited to this particular value.

As described above, when each of the radiation member 150C and the auxiliary radiation member 152A has a radiation pattern on its surface area in order to increase radiation efficiency, the radiation efficiency can be further increased.

The back surface of the body portion 184-2 may include at least one of the coating layer 174 or the roughness R shown in Fig. 11A or 11B, and the heat radiation members 150-10, 150-21, 150-22 and the auxiliary radiation members 152A and 152B may have at least two of the coating layer 174, the roughness R or the radiation pattern shown in FIG. 11A, FIG. 11B or FIG. For example, a coating layer 174 as shown in Fig. 11A may be disposed on the acid (P) and the valley (V), which are radiation patterns shown in Fig. Alternatively, the roughness shown in Fig. 11B may have the aforementioned heat radiation pattern.

12, the mountain P and the valley V are formed by extending in the z-axis direction and repeated in the x-axis direction. However, in the embodiment, the mountain P and the valley V extend in the z- And the directions in which they are repeated. That is, according to another embodiment, the mountain P and the valley V may be formed extending in the x-axis direction and repeated in the z-axis direction.

13 shows an external perspective view of a backlight unit 100B according to another embodiment.

The backlight unit 100B shown in FIG. 13 includes a light source module LM, a support member 148, heat transfer members 180-11 and 180-12, and a plurality of heat radiation members 150-10, 150-21, 22).

The first radiation member 150-10 shown in FIG. 1 is a member of a single body, whereas the first radiation member 150-10 shown in FIG. 13 includes a plurality of the first through fourth radiation members 150-10, (150-11 to 150-14). Except for this, since the backlight unit 100B shown in FIG. 13 is the same as the backlight unit 100A shown in FIG. 1, the duplicated description will be omitted.

In the case of FIG. 13, the 1-1 to 1-4 heat dissipating members 150-11 to 150-14 are illustrated as being disposed in contact with each other, but the embodiments are not limited thereto. That is, according to another embodiment, the 1-1 to 1-4 heat dissipating members 150-11 to 150-14 may be spaced apart from each other. The first to fourth heat dissipating members 150-11 to 150-14 spaced apart from each other may be connected to each other by a heat transfer member.

14 is a cross-sectional view of another embodiment of a backlight unit. 15A and 15B illustrate an exploded perspective view of the unit 100C. Figs. 15A and 15B show the second connection member 162-2, the second heat transfer member 180-12, Fig. 16 is a cross-sectional view of the second connecting member 162-2 shown in Fig. 14, and Fig. 16 is an exploded perspective view of the second connecting member 162-2 shown in Fig. The second heat transfer member 180-12 and the first and second heat dissipating members 150-10 and 150-22 are disposed on the back surface of the body portion 148-2. .

Referring to Figs. 14, 15A, 15B, and 16, the body part 148-2 is provided with second (2-1) and second (2-2) ) Or first and second grooves (or blind holes) H1, H2 that receive at least some of the first and second heat transfer members 180-11, 180-12 , But the embodiment is not limited thereto. These grooves may be formed on the back surface of the body portion 148-2 by the number of heat transfer members spaced apart from each other.

14, the second-1 connecting member 162-1 and the first heat transfer member 180-11 are accommodated in the first groove H1, and the second-second connecting member 162-1 and the second heat- -2 and the second heat transfer member 180-12 may be accommodated in the second blind hole H2. Alternatively, although not shown, the second connection members 162-1 and 162-2 and the heat transfer members 180-11 and 180-12 and the heat radiation members 150-10, 150-21 and 150-22 May be accommodated in the first and second grooves H1 and H2, respectively.

Referring to FIG. 15A, the second groove H1 may be spaced a predetermined distance D from the upper surface TS of the support 148-1. FIG. 14 corresponds to the case where the predetermined distance D is '0'.

The second connecting members 162-1 and 162-2 are disposed on at least one of the bottom surface HB or the side surface HS of the first and second grooves H1 and H2 and the heat conductive members 180-11 and 180- 12).

According to one embodiment, the second connection members 162-1 and 162-2 are disposed on the bottom surface HB of the first and second grooves H1 and H2 and the first and second heat conduction members 180-11, 180-12. For example, as shown in Figs. 15A and 15B, the second connecting member 162-2 is disposed between the bottom surface HB of the second groove H2 and the second heat conductive member 180-12 .

According to another embodiment, the second connecting members 162-1 and 162-2 are provided on the bottom surface HB and the side surface HS of the first and second grooves H1 and H2, respectively, May be disposed between members 180-11 and 180-12. 16, the second connecting member 162-2 is connected to the bottom surface HB and the side surface HS of the second groove H2 and the second heat conductive member 180-12, respectively, As shown in FIG.

The structure in which the second-first connecting member 162-1 and the first heat conductive member 180-111 are disposed in the first groove H1 shown in FIG. 14 is also illustrated in FIG. 15A or FIG.

In addition, the heat transfer member (e.g., 180-12) may be completely embedded in the second groove H2 as illustrated in FIG. 16, and the second groove H2, as illustrated in FIGS. 15A and 15B, Only a portion thereof may be accommodated.

The area in which the second connecting member 162-2 is in contact with the second heat transfer member 180-12 as compared with the second connecting member 162-2 shown in FIGS. 15A and 15B The heat transfer efficiency from the heat transfer members 180-11 and 180-12 to the heat dissipating members 150-10, 150-21 and 150-22 can be improved and the heat dissipation efficiency can be improved.

Hereinafter, a backlight unit 100D, 100E according to another embodiment will be described in more detail with reference to FIGS. 17A to 18B attached hereto. For convenience of explanation, only the connection and arrangement of the heat conducting member and the heat dissipating member in each of the backlight units 100D and 100E will be described.

17A and 17B show another example in which the heat transfer members 180-21, 180-22, 180-23 and 180-24 and the heat radiation members 150-31 and 150-32 in the backlight unit 100D ≪ / RTI > Fig. 17A shows a state before the heat radiation members 150-31 and 150-32 are placed, and Fig. 17B shows a state after the heat radiation members 150-31 and 150-32 are disposed.

A plurality of heat transfer members 180-21 to 180-24 may be arranged in the longitudinal direction (e.g., the x-axis direction) of the body portion 148-2, as illustrated in Fig. 17A. Here, although four heat transfer members 180-21 to 180-24 are illustrated as being arranged, two or three or more heat transfer members may be arranged in the longitudinal direction of the body portion 148-2 Of course.

Each of the plurality of heat transfer members 180-21 to 180-24 may include first and second segments. For example, the fourth heat transfer member 180-24 may include a first segment 180-241 and a second segment 180-242. The first segment (e.g., 180-241) of each heat transfer member 180-21 to 180-24 extends in the minor axis direction (e.g., the z-axis direction) of the body portion 148-2. In addition, the second segment (e.g., 180-242) of each heat transfer member 180-21 through 180-24 is bent from the first segment (e.g., 180-241) And may extend in the major axis direction (e.g., the x axis direction). The second segment (e.g., 180-242) may be disposed at the bottom of the back surface of the body portion 148-2. When each of the heat transfer members 180-21 to 180-24 includes both the first and second segments, each of the heat transfer members 180-21 to 180-24 may have an L shape.

At least one of the first or second segments of the plurality of heat transfer members 180-21 to 180-24 is arranged at equal intervals in the longitudinal direction (e.g., the x-axis direction) of the body portion 148-2 They may be spaced apart or may be spaced apart from one another.

A first gap g1 between the first heat transfer member 180-21 and the second heat transfer member 180-22 and a first gap distance g2 between the second heat transfer member 180-22 and the third heat transfer member 180-23 The second spacing distance g2 and the third spacing distance g3 where the third heat transfer member 180-23 and the fourth heat transfer member 180-24 are spaced apart from each other may be the same or different from each other.

When the first to third spacings g1, g2 and g3 are not 0, the second segments of the first to fourth heat transfer members 180-21 to 180-24 are spaced apart from each other The heat release rate can be further increased.

17B, the plurality of heat transfer members 180-21 to 180-24 may be connected to each other by the heat dissipation members 150-31 and 150-32. In the case of Fig. 17B, two heat radiation members 150-31 and 150-32 are illustrated as being disposed, but the embodiment is not limited to this. That is, only the first heat radiation member 150-31 may be disposed, or only the second heat radiation member 150-32 may be disposed. Alternatively, in addition to the first and second heat radiation members 150-31 and 150-32, a third heat radiation member (not shown) may be provided on the first heat radiation member 150-31 in the minor axis direction In the z-axis direction).

17A and 17B, a plurality of heat transfer members 180-21 to 180-24 are shown disposed between the back surface of the body portion 148-2 and the heat radiation members 150-31 and 150-32 , But the embodiment is not limited thereto. 17B, a plurality of heat dissipating members 150-31 and 150-32 are formed on the rear surface of the body portion 148-2 and the heat transfer members 180-21 to 180-24 As shown in FIG.

18A and 18B show another example in which the heat transfer members 180-31, 180-32, 180-33, and 180-34 and the heat radiation members 150-31 and 150-32 in the backlight unit 100E ≪ / RTI > Fig. 18A shows a state before the heat radiation members 150-31 and 150-32 are placed, and Fig. 18B shows a state after the heat radiation members 150-31 and 150-32 are disposed.

Each of the plurality of heat transfer members 180-21 to 180-24 shown in Figures 17A and 17B includes both the first and second segments (e.g., 180-241, 180-242), while Figure 18A And each of the plurality of heat transfer members 180-31 to 180-34 shown in Fig. 18B includes only the first segment. That is, the plurality of heat transfer members 180-21 to 180-24 shown in FIGS. 17A and 17B are L-shaped, while the plurality of heat transfer members 180-31 to 180 -34) is an 'I' shape.

Unlike the respective heat transfer members 180-21 to 180-24 shown in Figs. 17A and 17B, a plurality of heat transfer members 180-31 to 180-34 shown in Figs. 18A and 18B The first segment has a pair structure.

For example, the first heat transfer member 180-31 has a pair structure of the first-first segment 180-311 and the first-second segment 180-312, and the second heat transfer member 180-32 has a pair structure of the first- The first heat transfer member 180-33 has a pair structure of the first 1-1 segment 180-321 and the 1-2 segment 180-322, The fourth heat transfer member 180-34 has a pair structure of the 1-2 segment 180-332 and the fourth heat transfer member 180-34 has the pair structure of the 1-1st segment 180-341 and the 1-2 segment 180-342 .

Further, the pair structure of the plurality of heat transfer members 180-31 to 180-34 may be arranged at equal intervals. For example, the first heat transfer member 180-31 and the second heat transfer member 180-32 are spaced a first distance G1 and the second heat transfer member 180-32 and the third heat transfer member 180 -33 may be spaced apart by a second distance G2 and the third heat transfer members 180-33 and the fourth heat transfer members 180-34 may be spaced by a third distance G3. At this time, the first to third distances G1 to G3 may be equal to each other, but the embodiments are not limited thereto. According to another embodiment, the first to third distances G1 to G3 may be different from each other.

In addition, distances of the first 1-1 and second 1-2 segments of each of the plurality of heat transfer members 180-31 through 180-34 may be different from each other or may be equal to each other. That is, the first-first segment 180-311 and the first-second segment 180-312 of the first heat transfer member 180-31 are spaced apart from each other by the first gap g11, The first 1-1 segment 180-321 and the 1-2 segment 180-322 of the first heat transfer member 180-32 are spaced apart from each other by the 1-2 gap g12, The first 1-1 segment 180-331 and the 1-2 segment 180-332 are spaced apart from each other by the first interval g13 and the first 1-1 second segment 180-34 of the fourth heat transfer member 180-34 180-341) and the 1-2 segment 180-342 are spaced apart from each other by the first-fourth interval g14. In this case, the 1-1 to 1-4-th intervals g11 to g14 may be the same or different from each other.

Except for the differences described above, FIGS. 18A and 18B are respectively identical to FIGS. 17A and 17B, so that the description of FIGS. 17A and 17B can be applied, and a duplicate description will be omitted. That is, the first and second heat dissipating members 150-31 and 150-32 shown in FIG. 18B correspond to the first and second heat dissipating members 150-21 and 150-22 shown in FIG. 17B, respectively.

18A and 18B, a plurality of heat transfer members 180-31 to 180-34 are disposed between the back surface of the body portion 148-2 and the heat dissipation members 150-31 and 150-32, But is not limited thereto. That is, it is needless to say that a plurality of heat dissipating members 150-31 and 150-32 may be disposed between the rear surface of the body portion 148-2 and the heat transfer members 180-31 to 180-34.

Further, the above-mentioned heat transfer members 180-11, 180-12, 180-21, 180-22, 180-23, 180-24, 180-31, 180-32, 180-33, 180-34 are arranged A heat radiation member is disposed in place of the heat transfer members 180-11, 180-12, 180-21, 180-22, 180-23, 180-24, 180-31, 180-32, 180-33, 180-34 .

19 shows the rear surface of the body portion 148-2 in which the driving circuit portion 190 is disposed.

The driving circuit portion 190 is disposed at a driving region (hatched portion) on the outer side (or rear side) of the body portion 148-2 to drive the light source module LE. For example, the driving circuit unit 190 may be implemented as a printed circuit board (PCB).

Although not shown, the backlight unit 140 includes a light guide plate (or an air gap) (not shown), a reflective sheet (not shown), a diffusion sheet (not shown), a prism sheet . The light guide plate can convert the light source from the light source 144 into a surface light source. The reflective sheet is disposed downward in the backlight unit 100 (100A to 100E), and reflects light emitted to the outside to the upper side. The diffusion sheet diffuses the light of the light guide plate. A prism sheet functions to gather light at a certain angle.

20A is a view showing the heat radiation of the body portion 148-2 in which the heat transfer members 180-11 to 180-34 are not disposed, And the heat dissipation of the portion 148-2.

When the plurality of heat radiation members 150-10 to 150-32 are thermally connected by the heat transfer members 180-11 to 180-34, a plurality of heat radiation members 150-10 to 150- -32), the heat can be dispersed evenly. That is, when the amount of heat to be dissipated varies from position to position on the back surface of the body portion 148-2, heat can be uniformly transferred to other neighboring heat dissipating members through the heat transfer members 180-11 to 180-34. For example, as shown in Fig. 20A, the heat transfer members 180-11 to 180-34 are arranged in the same manner as the body portion 148-2 in which the heat transfer members 180-11 to 180-34 are not disposed, -34 are arranged on the rear surface of the body portion 148-2. When the heat distribution is wide, the heat dissipation efficiency and the speed can be increased. 20A, the temperature of the central portion of the body portion 148-2 is 67.7 DEG C, while in the case of FIG. 20B, the temperature of the center portion of the body portion 148-2 is 64.7 DEG C. In the embodiment, ) Is lowered by about 3 占 폚.

As a result, as shown in FIGS. 1, 13, 14, 17B and 18B, the plurality of heat radiation members 150-10, 150-21, 150-22, and 150-31 in the backlight units 100A to 100E 150-21, 150-22, 150-31, 150-32 are spaced apart from one another by heat transfer members 180-11, 180-12, 180-21 to 180-24, 180-31 to 180-34). Further, when the heat transfer members 180-11, 180-12, 180-21 to 180-24, and 180-31 to 180-34 are disposed apart from each other, the heat transfer members 180-11, 180-12 , 180-21 to 180-24, 180-31 to 180-34 may be connected to each other by the heat radiation members 150-10, 150-31, and 150-32. Therefore, a plurality of heat radiation members 150-10, 150-21, 150-22, 150-31, 150-32, or heat transfer members 180-11, 180-12, 180-21 to 180-24, 180-31 to 180-34), so that the heat dissipation rate is increased, and the heat dissipation rate and efficiency can be improved.

20A and 20B, when the distribution of the heat to be radiated on the back surface of the body portion 148-2 differs depending on the position of the back surface, the heat is transferred from the side having the greater heat to the side having the smaller side, And can be quickly released to the outside.

Further, although the heat transfer members 180-11, 180-12, 180-21 to 180-24, and 180-31 to 180-34 mainly perform the function of heat transfer, they can also perform the function of heat emission additionally . Particularly, the heat transfer members 180-11, 180-12, 180-21 to 180-24, 180-31 to 180-34 and the heat radiation members 150-10, 150-21, 150-22, 150-31, 150 -32) are arranged as in the backlight units 100A to 100E according to the embodiment, the heat radiation efficiency can be further improved.

In order to increase the area in which the radiation members 150-10, 150-21, 150-22, 150-31, and 150-32 are in contact with the air, the radiation patterns may be implemented to have the radiation patterns illustrated in FIG. 12, 150-101, 150-21, 150-22, 150-31, 150-32) or at least one of the heat transfer members (180-11, 180-12, 180-21 to 180-24, 180-31 to 180-34) If one is provided with the coating layer 174 shown in FIG. 11A or the roughness R shown in FIG. 11B, the heat radiation efficiency can be further maximized. Therefore, the backlight units 100A to 100E according to the embodiments have excellent heat dissipation efficiency, so that they have a long lifetime, provide increased brightness, and can provide excellent stability and reliability.

As shown in Figs. 14 to 16, grooves H1 and H2 are formed in the body portion 148-2 and second connection members 162-1 and 162-2 And the heat transfer members 180-11 and 180-12 are disposed, the space required for heat radiation can be further reduced.

The heat transfer members 180-11, 180-12, 180-21 to 180-24, 180-31 to 180-34 or the heat radiation members 150-10, 150-21, 150-22, 150-31, 150 -32 may be disposed in the area PA around the driving area as shown in FIG. Therefore, since the unused peripheral area PA is used, the heat radiation members 150-10, 150-21, 150-22, 150-31, and 150-32 and the heat transfer members 180-11, 180-12, 180 -21 to 180-24, 180-31 to 180-34) is not required.

Further, the backlight units 100A to 100E according to the above-described embodiments can be applied to the liquid crystal display device 1000 because the liquid crystal panel can not emit light itself.

Hereinafter, a liquid crystal display device 1000 according to an embodiment will be described with reference to the accompanying drawings.

21 is an exploded perspective view of the liquid crystal display device 1000 according to the embodiment.

The liquid crystal display device 1000 according to the embodiment shown in FIG. 21 may include cases 202 and 230, a tempered glass 210, a device panel 220, and a backlight unit 100.

The cases 202 and 230 may be disposed to enclose the tempered glass 210, the device panel 220, and the backlight unit 100.

For example, the case may include a front cover 202 and a back cover 230. The back cover 230 may be coupled with the front cover 202 to cover the tempered glass 210, the device panel 220, and the backlight unit 100. The front cover 202 and the back cover 230 may be coupled to each other in various manners, and the embodiment is not limited to the specific combination structure of the front cover 202 and the back cover 230. [

The front cover 202 is formed with an opening OP for exposing the device panel 220. The tempered glass 210 may be mounted on the front of the opening OP of the front cover 202, but the embodiment is not limited thereto. That is, according to another embodiment, instead of the tempered glass 210, a member having a shape of at least one of plastic or film may be mounted on the opening OP. For example, the tempered glass 210 may be replaced by at least one of a reinforced coating film, an LCD glass, or a plastic substrate for a flexible panel, although embodiments are not limited to any particular type of tempered glass 210.

For example, the tempered glass 210 can be manufactured by heating the glass plate to a temperature close to the softening temperature, rapidly quenching the glass with compressed cooling air to compressively deform the glass surface portion, and tensile deforming the inside. Such a tempered glass 210 has higher bending strength, impact resistance and heat resistance than ordinary glass. In addition, the tempered glass 210 may be replaced by a reinforced coating film produced by forming a reinforcing coating layer that increases the hardness on the surface of the film substrate.

The device panel 220 receives the light emitted from the backlight unit 100 and implements the image. For example, the device panel 220 may be implemented as a liquid crystal panel (LCD Panel), but the embodiment is not limited thereto. Hereinafter, the device panel 220 is described as being a liquid crystal panel, but the following description can be applied even when the device panel 220 is a different type of panel.

The liquid crystal panel can display an image using a liquid crystal cell whose light transmittance is adjusted according to an electric field.

The liquid crystal panel is closely attached to the tempered glass 210 and disposed behind the front cover 202. For example, the liquid crystal panel may include a thin film transistor array (TFTA) substrate (not shown), a color filter array (CFA) substrate (not shown), a liquid crystal layer (not shown) (Not shown) and an upper polarizer (not shown).

The TFTA substrate is disposed in front of the backlight unit 100, and the CFA substrate is disposed in front of the TFTA substrate. The CFA substrate and the TFTA substrate may be disposed opposite to each other. The liquid crystal layer is filled between the TFTA substrate and the CFA substrate.

The lower polarizer is disposed between the backlight unit 100 and the TFTA substrate. The lower polarizer serves to polarize the light incident on the liquid crystal layer from the backlight unit 100. The upper polarizer serves to polarize the light transmitted to the outside from the liquid crystal layer.

Each of the lower polarization section and the upper polarization section divides the light incident thereon into two polarization components orthogonal to each other and transmits only the light oscillating in the same direction as the polarization axis and absorbs or disperses the light in the other direction, As shown in FIG. For example, the material of each of the lower polarizing portion and the upper polarizing portion may be triacetylcellulose (TAC), but the embodiment is not limited thereto.

The liquid crystal panel having the above-described structure determines whether or not the electric field of the liquid crystal layer corresponding to each pixel is applied through the TFTA substrate and adjusts the transmittance degree of the light incident from the backlight unit 100 according to the electric field applied to the liquid crystal layer, Can be adjusted. Such a liquid crystal panel can be driven by a TN (Twisted Nematic) method or a transversal electric field method, but the embodiment is not limited to the driving form of the liquid crystal panel.

Further, the liquid crystal panel can be controlled by the driving circuit unit 190. [

Meanwhile, the backlight unit 100 is disposed on the back surface 220BS of the device panel 220, and serves to irradiate light. That is, the backlight unit 100 serves to supply light to the device panel 220. For example, the backlight unit 100 may correspond to any one of the backlight units 100A to 100E according to the above-described embodiment. Further, for example, the light source 144 of the backlight unit 100 (100A to 100E) may be disposed toward the back surface 220BS of the device panel 220. [

The light supplied from the backlight unit 100 sequentially passes through the pixel electrode, the liquid crystal, and the common electrode of the liquid crystal panel. At this time, the display quality of the image passed through the liquid crystal greatly depends on the luminance and luminance uniformity of the backlight unit, that is, the backlight unit 100. In general, the higher the luminance and luminance uniformity, the better the display quality. However, when heat is generated as the input current of the liquid crystal display device 1000 increases and the generated heat can not be discharged smoothly, the lifetime and luminance of the backlight unit 100 may be lowered. Further, 1000 may be degraded in stability and reliability. In order to solve this problem, a liquid-crystal display device generally uses a blowing fan.

However, in the liquid crystal display device 1000 according to the above-described embodiment, the structure of the support member 148 in the backlight unit 100 is changed and the heat transfer member and the heat dissipation member The member can be used to release heat. Therefore, since a structure such as a blower fan is not required, the space required for heat radiation is not increased, and the manufacturing cost can be reduced. Particularly, since no air flow path is formed in the body part 148-2 and no air blowing fan is required, the manufacturing cost of the structure for radiating heat including the body part 148-2 can be reduced.

Therefore, when the liquid crystal display device 1000 according to the embodiment uses the backlight units 100A to 100E according to the above-described embodiment, the stability and reliability of the liquid crystal display device 1000 can be improved.

The liquid crystal display device 1000 according to the embodiment described above can be applied to various electronic display products such as a mobile phone, a portable small computer, a portable game machine, a handy terminal, a PDA, a portable audio player, a notebook, a navigation device, a TV receiver, Lt; / RTI >

Hereinafter, a vehicle display unit according to an embodiment including the above-described liquid crystal display device 1000 will be described with reference to the accompanying drawings as follows.

22 is a view exemplarily showing an appearance of a display unit for a vehicle according to an embodiment including the liquid crystal display device 1000. [

Referring to FIG. 22, the vehicle display unit according to the embodiment may include the liquid crystal display device 1000 according to the above-described embodiment. For example, the vehicle display unit according to the embodiment includes a center interface display (CID) 300 attached to a head unit of a vehicle, a display 410 for a rear seat entertainment (RSE) Or a cluster (or driver's instrument panel) 400. Here, each of the CID 300, the RSE display 410, and the cluster 400 may include the liquid crystal display device 1000 according to the above-described embodiment.

23 shows a schematic block diagram of a vehicle display unit 2000 according to the embodiment.

The vehicle display unit 2000 shown in FIG. 23 may include a CID 300, a vehicle playback apparatus 500, and a cable 600.

The CID 300 corresponds to the CID 300 shown in FIG. 22, and can be electrically connected to the vehicle playback apparatus 500 by a cable 600.

The CID 300 may include a liquid crystal display device 1000 and operation buttons 310. Here, the operation button 310 may be disposed on the front cover 202. [ The vehicle playback apparatus 500 may be an apparatus that can reproduce video and audio signals such as a DVD player, and may include an operation button 510 and a recording medium input port 520.

The CID 300 transmits a control signal for controlling the on-vehicle playback apparatus 500 to the on-vehicle playback apparatus 500 via the cable 600. The on-vehicle playback apparatus 500 reproduces the on- To the CID 300 via the cable 600. The CID 300 provides driving information to a user, and performs a monitor function to reproduce video and audio signals transmitted from the on-vehicle playback apparatus 500. [

The CID 300 includes the liquid crystal display device 1000 and may further optionally include an operation button 310. [ That is, a user's control command for controlling the CID 300 or the user's control command for controlling the on-vehicle playback apparatus 500 is provided by operating at least one of the liquid crystal display device 1000 or the operation button 310 .

FIG. 24 shows a block diagram according to an embodiment 300A of the CID 300 shown in FIG.

The CID 300A according to the embodiment shown in FIG. 24 includes a liquid crystal display device 1000, a storage unit 320, a control unit 330, an interface 340, an audio processing unit 350, a speaker 360, A key input unit 370, and a key input unit 380.

Referring to FIG. 24, the CID 300A may receive a user's control command through the key input unit 380 connected to the liquid crystal display device 1000 or the operation button 310. FIG. The storage unit 320 may store map data and graphic data so that a navigation function can be implemented, and may store a control code for controlling the vehicle-use playback apparatus 500. For example, the storage unit 320 may be in the form of at least one of a flash memory, an SDRAM, or a hard disk, but embodiments are not limited thereto.

The control code that can control the vehicle playback apparatus 500 may mean a code that can identify each manufacturer so that the vehicle playback apparatus 500 manufactured by a plurality of manufacturers can be controlled. For example, when all of the control codes used by various companies are stored, if the user provides a playback start command of the on-vehicle playback apparatus 500, To the vehicle-use playback apparatus 500 via the interface 340. [0050] FIG. At this time, the in-vehicle reproducing apparatus 500 manufactured by a certain company does not operate when a control code used by another company is input, and can be operated only when a control code used by the company is inputted.

Also, the GPS unit 370 can receive positioning information such as latitude, longitude, and altitude from the satellite. The audio processing unit 350 processes the audio signal to transmit the audio signal to the speaker 360 so that the audio signal can be reproduced. The speaker 360 may be an external speaker connected to the CID 300A.

In addition, the liquid crystal display device 1000 may display map information and position information so that a navigation function can be implemented, and reproduce a video signal input from the vehicle-use playback device 500. [

The interface 340 is connected to the vehicle playback apparatus 500 to transmit a control code for controlling the vehicle playback apparatus 500 and to receive the video and audio signals transmitted from the vehicle playback apparatus 500.

In addition, the control unit 330 controls all the parts including the liquid crystal display device 1000 so that the navigation function is performed, and reproduces the video and audio signals received from the on-vehicle playback device 500.

22 to 24 are only one example for facilitating understanding of the vehicle display unit according to the embodiment, and the embodiment is not limited to this.

Hereinafter, an image display device according to an embodiment including the above-described liquid crystal display device 1000 will be described with reference to the accompanying drawings as follows. Here, the video display device may mean a portable small computer, a notebook, a TV receiver, a monitor, a projector, a terminal for digital broadcasting, and the like.

25 is a diagram showing the appearance of the video display device 3000 according to the embodiment.

Referring to FIG. 25, the image display apparatus 3000 according to the embodiment is an apparatus for displaying an image, and may be a fixed image display apparatus or a mobile image display apparatus. Alternatively, the image display apparatus 3000 may perform three-dimensional (3D) image signal processing. For example, when a 3D image input to the image display apparatus 3000 is composed of a plurality of view-point images, the left-eye image and the right-eye image are subjected to signal processing, the left eye image and the right eye image are arranged, can do. However, the embodiment is not limited to this, and the image display apparatus 3000 may perform two-dimensional (2D) image signal processing.

26 is an internal block diagram of the video display device 3000 shown in FIG.

26, an image display apparatus 3000 according to an embodiment includes a broadcast receiving unit 1105, an external device interface unit 1130, a storage unit 1140, a user input interface unit 1150, a sensor unit A control unit 1170, a liquid crystal display device 1000, and an audio output unit 1185, as shown in FIG.

The broadcast receiving unit 1105 may include a tuner unit 1110 and a demodulation unit 1180.

The tuner unit 1110 selects an RF broadcast signal corresponding to a channel selected by the user or all pre-stored channels among RF (Radio Frequency) broadcast signals received through the antenna 1050. Also, the selected RF broadcast signal is converted into an intermediate frequency signal, a baseband image, or a voice signal. For example, if the selected RF broadcast signal is a digital broadcast signal, it is converted into a digital IF signal (DIF). If the selected RF broadcast signal is an analog broadcast signal, it is converted into an analog baseband image or voice signal (CVBS / SIF). That is, the tuner unit 1110 can process a digital broadcast signal or an analog broadcast signal. The analog baseband video or audio signal (CVBS / SIF) output from the tuner unit 1110 can be directly input to the controller 1170.

The tuner unit 1110 can receive an RF broadcast signal of a single carrier according to an Advanced Television System Committee (ATSC) scheme or an RF broadcast signal of a plurality of carriers according to a DVB (Digital Video Broadcasting) scheme. The tuner unit 1110 sequentially selects RF broadcast signals of all broadcast channels stored through a channel memory function among the RF broadcast signals received through the antenna 1050 and converts the RF broadcast signals into an intermediate frequency signal, can do.

The demodulator 1180 receives the digital IF signal DIF converted by the tuner 1110 and performs a demodulation operation. The demodulator 1180 may perform demodulation and channel decoding and then output a stream signal TS. At this time, the stream signal may be a signal in which a video signal, a voice signal, or a data signal is multiplexed. The stream signal output from the demodulator 1180 may be provided to the controller 1170.

The control unit 1170 performs demultiplexing, video / audio signal processing, and the like, and then outputs an image to the liquid crystal display device 1000 and outputs audio to the audio output unit 1185. Here, since the liquid crystal display device 1000 is the same as the above-described liquid crystal display device, a description thereof will be omitted.

The external device interface unit 1130 can transmit or receive data with a connected external device (not shown). The external device interface unit 1130 can be connected to an external device such as a DVD (Digital Versatile Disk), a Blu ray, a game device, a camera, a camcorder, a computer (notebook computer) And may perform an input / output operation with an external device.

The storage unit 1140 may store a program for each signal processing and control in the control unit 1170, and may store signal-processed video, audio, or data signals. Also, the storage unit 1140 may perform a function for temporarily storing video, audio, or data signals input to the external device interface unit 1130. [ The storage unit 1140 may be included in the controller 1170.

The user input interface unit 1150 transmits a signal input by the user to the control unit 1170 or a signal from the control unit 1170 to the user.

The control unit 1170 demultiplexes the input stream or processes the demultiplexed signals through the tuner unit 1110 or the demodulation unit 1180 or the external device interface unit 1130 to generate a signal for video or audio output Can be generated and output. The video signal processed by the controller 1170 is inputted to the liquid crystal display device 1000 and can be displayed as an image corresponding to the video signal. In addition, the video signal processed by the controller 1170 may be provided to the external output device through the external device interface 1130.

The audio signal processed by the control unit 1170 may be output to the audio output unit 1185 or may be provided to the external output device through the external device interface unit 1130. [ In addition, the control unit 1170 can control the overall operation in the video display device 3000. [ For example, the controller 1170 controls the tuner unit 1110 to control the tuner unit 1110 to select an RF broadcast corresponding to a channel selected by the user or a previously stored channel. In addition, the controller 1170 can control the image display apparatus 3000 according to a user command or an internal program input through the user input interface unit 1150.

Meanwhile, the control unit 1170 may control the liquid crystal display device 1000 to display an image. At this time, the image displayed on the liquid crystal display device 1000 may be a still image or a moving image, and may be a 2D image or a 3D image.

The liquid crystal display device 1000 converts a video signal, a data signal, an OSD signal, a control signal processed by the control unit 1170 or a video signal, a data signal, and a control signal received from the external device interface unit 1130, Lt; / RTI > Also, the liquid crystal display device 1000 may be configured as a touch screen and used as an input device in addition to an output device.

The audio output unit 1185 receives the signal processed by the control unit 1170 and outputs it as a voice.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

100, 100A, 100B, 100C, 100D, 100E: a backlight unit
142, 142-1, 142-2, 142-3, 142-4: substrate
144: light source 146: first connection member
148: Support member 148-1:
148-2:
150-10, 150-11 to 150-14, 150-21, 150-22, 150-31, 150-32:
152A, 152B: the auxiliary radiation member
162-1, 162-2: second connecting member 164: third connecting member
174: Coating layer
180-11, 180-12, 180-21-180-24, 180-31-180-34: Heat transfer member
180-241: First segment 180-242: Second segment
182: Container 184: Week
186: steam space 190: drive circuit part
202: front cover 210: tempered glass
220: device panel 230: back cover
300, 300A: Central interface display
320: storage unit 330: control unit
340: interface 350: audio processor
360: Speaker 370: GPS unit
380: key input unit 410: display for rear seat display
400: cluster (or driver's instrument panel) 500: vehicle playback device
600: cable 1000: liquid crystal display device
2000: vehicle display unit 3000: video display device

Claims (23)

A plurality of light sources;
A substrate on which the plurality of light sources are disposed; And
And a support member for supporting the substrate,
The support member
A support disposed below the substrate; And
And a body portion bent and extended from the support portion,
At least one heat transfer member disposed outside the body portion; And
And a plurality of heat dissipating members disposed on the heat transfer member at positions corresponding to the light sources. The method according to claim 1,
Wherein at least a part of the plurality of heat radiation members is disposed apart from each other, the heat radiation member connects the heat transfer member,
Wherein the heat transfer member comprises a plurality of heat transfer members spaced from each other. The backlight unit according to claim 1, wherein at least some of the heat transfer member, at least some of the light source, and the plurality of heat radiation members overlap in the thickness direction of the body portion. The backlight unit according to claim 1, wherein the heat transfer member is disposed adjacent to a portion bent from the support portion to the body portion. The backlight unit according to claim 1, wherein the heat dissipating member is a metallic material or a ceramic (Al ₂ O _{3 )} material including Al, Cu and a zinc alloy. The backlight unit according to claim 1, wherein the heat radiation member includes a coating layer. The method according to claim 6, wherein the coating layer is formed of a material selected from the group consisting of silicon oxide, alumina (Al ₂ O ₃ ), zirconia (ZrO), silicon carbide (SiC), titanium carbide (TiC), silicon nitride And at least one material selected from the group consisting of an organic material and an inorganic material, at least one or more ceramic materials selected from the group consisting of ruthenium (R) (AlN), and the like. The backlight unit according to claim 1, wherein at least one surface of the heat radiation member includes a roughness having heat radiation. The backlight unit according to claim 8, wherein the roughness has a heat dissipation pattern in the form of a gear in which the acid (P) and the valley (V) are repeated. The backlight unit according to claim 9, wherein the height of the acid (P) is 2 mm to 3 mm and the width of the valley (V) is 1 mm to 3 mm. The backlight unit of claim 1, wherein the heat transfer member comprises a vessel, a wick, and a vapor space. 12. The backlight unit according to claim 11, wherein the heat transfer member is a heat pipe. 12. The backlight unit of claim 11, wherein the container comprises a cylindrical shape and is made of aluminum, stainless steel and carbon steel. 12. The backlight unit of claim 11, wherein the wick has a capillary operating principle. The backlight unit according to claim 1, further comprising a connecting member disposed between the outside of the body portion and the heat conducting member, the connecting member having adhesiveness and thermoelectric effect. The backlight unit according to claim 1, wherein the support member is integral or detachable. 17. The backlight unit according to claim 16, further comprising an auxiliary radiation member on the outside of the support member bent in the body from the support portion when the support member is integral. The backlight unit according to claim 1, wherein the supporting member is a metal material including aluminum. The backlight unit according to claim 1, further comprising a driving circuit portion disposed in a driving region outside the body portion. 20. The backlight unit according to claim 19, wherein the heat transfer member and the heat radiation member are disposed in the periphery of the drive circuit portion. The backlight unit according to claim 1, further comprising a groove for receiving the heat transfer member on an outer side of the body portion. 22. The backlight unit according to claim 21, wherein the heat radiation member is received in the groove together with the heat transfer member. Device panel;
A backlight unit according to claim 1 disposed on a back surface of the device panel; And
And a case enclosing the device panel and the backlight unit.

Images