Liquid crystal display device and television set

1. A liquid crystal display device, comprising:

a liquid crystal panel having a display region at which an image is displayed; and

a backlight unit disposed below the liquid crystal panel, wherein:

the backlight unit comprises:

at least one mounting substrate on which a plurality of light emitting diodes are mounted;

a radiator plate; and

a reflection member;

the reflection member has a reflection surface which is formed to have a recess surface shape below the liquid crystal panel;

the plurality of light emitting diodes on the at least one mounting substrate are disposed on a bottom portion of the reflection surface which is formed to have the recess surface shape;

the at least one mounting substrate is disposed at a position on an outer side of the reflection surface in the recess surface shape and under the bottom portion;

the at least one mounting substrate comprises a plurality of mounting substrates;

any two mounting substrates of the plurality of mounting substrates are disposed with an interval provided therebetween;

the radiator plate has a hollow through hole formed between the any two mounting substrates disposed with the interval provided therebetween;

the radiator plate is disposed under the at least one mounting substrate; and

the radiator plate has, in plan view, a larger area than the at least one mounting substrate and a smaller area than the display region of the liquid crystal panel.

2. The liquid crystal display device according to claim 1 , further comprising a casing for covering the radiator plate and the reflection member from outer sides thereof,

wherein the radiator plate is attached to the casing under a state in which a bottom surface of the radiator plate is brought into contact with the casing.

3. The liquid crystal display device according to claim 1 , wherein:

the bottom portion of the reflection surface is formed flat so that the reflection member is brought into contact with a top surface of the at least one mounting substrate;

the reflection surface which is formed to have the recess surface shape has inclined surfaces formed continuously with the bottom portion; and

the radiator plate overlaps a part of the inclined surfaces in plan view.

4. The liquid crystal display device according to claim 3 , wherein the radiator plate has a larger area than the bottom portion in plan view, to thereby overlap the part of the inclined surfaces.

5. The liquid crystal display device according to claim 1 , wherein:

each of the any two mounting substrates has a linear shape; and

the hollow through hole is formed in a groove shape between the any two mounting substrates.

6. The liquid crystal display device according to claim 1 , wherein:

each of the any two mounting substrates has a linear shape along a long-side direction of the liquid crystal panel; and

the hollow through hole is formed in a groove shape along the long-side direction of the liquid crystal panel.

7. The liquid crystal display device according to claim 1 , wherein:

each of the any two mounting substrates has a linear shape;

at least one of the any two mounting substrates has a first mounting portion and a second mounting portion on which the plurality of light emitting diodes are mounted in a higher density than in the first mounting portion; and

the hollow through hole is formed in a groove shape along the second mounting portion.

8. The liquid crystal display device according to claim 6 , wherein:

the any two mounting substrates are linearly arranged;

one of the any two mounting substrates is disposed in a manner offset to one side in the long-side direction;

another of the any two mounting substrates is disposed in a manner offset to another side in the long-side direction; and

the hollow through hole is formed in a groove shape between portions opposed to each other of the any two mounting substrates.

9. The liquid crystal display device according to claim 7 , wherein the second mounting portion is disposed at a position closer to a center of the liquid crystal panel in the long-side direction than the first mounting portion.

10. The liquid crystal display device according to claim 2 , wherein the casing and the radiator plate are formed flat in portions contacting to each other.

11. The liquid crystal display device according to claim 10 , wherein:

the casing has a through hole in the portion contacting to the bottom surface of the radiator plate;

the radiator plate has a screw hole in the portion contacting to the casing; and

the radiator plate is fixed to the casing by inserting a screw into the screw hole of the radiator plate via the through hole of the casing.

12. A television set, comprising the liquid crystal display device according to claim 1 , the television set being formed so as to receive a radio wave for television broadcast to display an image and output sound.