Liquid crystal display device

1. A liquid crystal display device comprising a liquid crystal display panel and a backlight disposed at a back of the liquid crystal display panel;

wherein the backlight includes a frame, at least one light source, a reflective sheet, and a heat dissipating plate formed in a rectangular shape;

wherein the frame houses at least one the light source, the reflective sheet, and the heat dissipating plate;

wherein the heat dissipating plate is disposed between the reflective sheet and a bottom surface of the frame;

wherein the heat dissipating plate comprises a first portion and a second portion facing the first portion, and has a plurality of first openings at the first portion and at least one second opening at the second portion;

wherein the plurality of first openings are formed along the first portion;

wherein each of the first openings has a first edge and a first fin formed at a part of the first edge;

wherein the bottom surface of the frame has a plurality of slits;

wherein the first fin protrudes through one of the slits; and

wherein the at least one second opening is covered with the reflective sheet and the bottom surface of the frame.

2. The liquid crystal display device according to claim 1 , wherein a plurality of second openings are formed along the second portion.

3. The liquid crystal display device according to claim 1 , wherein a plurality of third openings are formed at a region between the first openings and the at least one second opening;

wherein the third openings are formed along a direction in which the first portion extends;

wherein each of the third openings has a second edge and a second fin formed at a part of the second edge; and

wherein the second fin protrudes through one of the slits.

4. The liquid crystal display device according to claim 3 , wherein the second fin is disposed between two of the first fins which are adjacent each other when viewed from the first portion.

5. The liquid crystal display device according to claim 3 , wherein the first portion and the second portion extend in a first direction; and

wherein the first fin and the second fin have a shape extending in a second direction which is different from the first direction.

6. The liquid crystal display device according to claim 3 , wherein the plurality of the slits face the plurality of the first openings and the plurality of the third openings, respectively.

7. The liquid crystal display device according to claim 1 , wherein the first portion and the second portion extend in a first direction; and

wherein the first fin has a shape extending in a second direction which is different from the first direction.