Backlight unit and display device having the same

A device comprising:

• a display panel configured to display an image;
• a top sash configured to support a periphery of a front surface of the display panel;
• a rear cover forming a rear side exterior of the device;
• a bottom sash disposed at a rear side of the display panel;
• a power supply board configured to supply the display panel with power and mounted on a rear surface of the bottom sash;
• a plurality of light emitting diodes (LEDs) configured to provide the display panel with light;
• a plurality of printed circuit boards (PCBs) which are disposed at a bottom surface of the bottom sash and on which the plurality of LEDs are mounted;
• and
• a plurality of heat radiation sheets disposed at a rear side of the plurality of PCBs.

A device comprising:

• a display panel;
• a top sash disposed at a front side of the display panel and having an opening that allows a portion of the display panel, on which an image is displayed, to be exposed through a front surface of the top sash;
• a bottom sash which is disposed at a rear side of the display panel and on which the display panel is mounted;
• at least one printed circuit board (PCB) stacked up in parallel to a bottom surface of the bottom sash and disposed adjacent to a rim of the bottom sash;
• a plurality of light emitting diodes (LEDs) mounted on the at least one PCB while protruding beyond a surface of the at least one PCB to provide the display panel with light;
• and
• at least one heat radiation sheet mounted on the bottom sash while making contact with a front surface of the bottom sash such that the heat emitted from the at least one PCB is distributed,
• wherein the bottom sash comprises an Electrolytic Galvanized Iron (EGI).

A device comprising:

• a display panel;
• a top sash disposed at a front side of the display panel and having an opening that allows a portion of the display panel, on which an image is displayed, to be exposed through a front surface of the top sash;
• a bottom sash disposed at a rear side of the display panel and comprising a bottom surface and a bottom lateral surface that protrudes from the bottom surface;
• at least one printed circuit board (PCB) stacked up in parallel to the bottom lateral surface, and disposed adjacent to a rim of the bottom sash;
• at least one heat sink disposed between the bottom sash and the at least one PCB and comprising a base plate making contact with the bottom surface of the bottom sash and a side plate that is bent from the base plate and is extended to make contact with the bottom lateral side of the bottom sash;
• a plurality of light emitting diodes (LEDs) mounted on the PCB while protruding from a front surface of the PCB to provide the display panel with light;
• and
• at least one heat radiation sheet mounted on the bottom sash while making contact with a front surface of the bottom sash such that the heat emitted from the at least one PCB is distributed,
• wherein the bottom sash comprises an Electrolytic Galvanized Iron (EGI).

A backlight unit comprising:

• a light guide plate;
• at least one light emitter configured to radiate light to a lateral side of the light guide plate;
• a bottom sash which is disposed at a rear side of the light guide plate and on which the at least one light emitter is mounted;
• and
• at least one heat radiation sheet mounted on the bottom sash.