Provided is a display device that is capable of preventing heat generated in a plurality of light emitting diodes (LEDs) from being excessively transferred to a top chassis so that the occurrence of a safety accident and poor quality of a display panel can be prevented. The display device includes:
Provided is a display device that is capable of preventing heat generated in a plurality of light emitting diodes (LEDs) from being excessively transferred to a top chassis so that the occurrence of a safety accident and poor quality of a display panel can be prevented. The display device includes: a display panel on which an image is formed; a top chassis in front of the display panel and having an opening through which the display panel is exposed; a plurality of LEDs that provide light to the display panel; a printed circuit board (PCB) on which the plurality of LEDs are mounted; and a bottom chassis behind the PCB, wherein the PCB and the bottom chassis are arranged such that an air gap is between the PCB and an inner side surface of the bottom chassis.
대표청구항▼
1. A display device comprising: a display panel on which an image is formed;a top chassis in front of the display panel and having an opening through which the display panel is exposed;a plurality of light emitting diodes (LEDs) configured to provide light to the display panel;a printed circuit boar
1. A display device comprising: a display panel on which an image is formed;a top chassis in front of the display panel and having an opening through which the display panel is exposed;a plurality of light emitting diodes (LEDs) configured to provide light to the display panel;a printed circuit board (PCB) on which the plurality of LEDs are mounted; anda bottom chassis behind an entirety of the PCB,wherein the PCB and the bottom chassis are arranged such that an air gap is between the PCB and an inner side surface of the bottom chassis,wherein a side of the PCB that faces the inner side surface of the bottom chassis comprises an extension portion that extends laterally toward the inner side surface of the bottom chassis, and another portion that is farther from the inner side surface of the bottom chassis than the extension portion, and which forms a step with the extension portion parallel to a side surface of the PCB that faces the inner side surface of the bottom chassis,wherein the plurality of LEDs are mounted on a front surface of the extension portion that faces the display panel, andwherein the first surface of the extension portion is in the same plane as the PCB. 2. The display device of claim 1, wherein at least one side of the PCB facing the inner side surface of the bottom chassis is spaced apart from the inner side surface of the bottom chassis. 3. The display device of claim 1, wherein an incline surface is formed on at least one side of the PCB, and the air gap is between the bottom chassis and the incline surface. 4. The display device of claim 1, wherein a side surface of the extension portion that faces the inner side surface of the bottom chassis is spaced apart from the inner side surface of the bottom chassis. 5. The display device of claim 1, further comprising a spacer in the air gap and formed of an insulating material. 6. The display device of claim 5, wherein a thermal conductivity of the spacer is less than a thermal conductivity of the PCB. 7. The display device of claim 1, further comprising a heat sink behind the PCB, farther from the display panel than the PCB. 8. The display device of claim 7, wherein a rear surface of the PCB facing the heat sink comprises a portion that does not overlap with the heat sink, and the air gap is between the bottom chassis and the portion of the rear surface of the PCB. 9. The display device of claim 7, further comprising a heat reflection coating layer at a front surface of the heat sink that faces the display panel. 10. The display device of claim 1, wherein the plurality of LEDs emit the light in a direction parallel to a front surface of the PCB on which the plurality of LEDs are mounted. 11. A display device comprising: a display panel on which an image is formed;a plurality of light emitting diodes (LEDs) to a left side or a right side of a rear of the display panel and configured to provide light to the display panel;a printed circuit board (PCB) on which the plurality of LEDs are mounted;a top chassis in front of the display panel and having an opening through which the display panel is exposed;a bottom chassis behind an entirety of the PCB and contacting a portion of the top chassis; anda heat dissipation sheet behind the bottom chassis,wherein at least a portion of a side of the PCB that faces an inner side surface of the bottom chassis does not contact the inner side surface of the bottom chassis so that an air gap is formed between the inner side surface of the bottom chassis and the PCB,wherein the side of the PCB that faces the inner side surface of the bottom chassis comprises an extension portion that extends laterally toward the inner side surface of the bottom chassis, and another portion that is farther from the inner side surface of the bottom chassis than the extension portion, and which forms a step with the extension portion parallel to a side surface of the PCB that faces the inner side surface of the bottom chassis,wherein the plurality of LEDs are mounted on a front surface of the extension portion that faces the display panel, andwherein the first surface of the extension portion is in the same plane as the PCB. 12. The display device of claim 11, further comprising a spacer in the air gap and formed of a resin material having low thermal conductivity. 13. The display device of claim 11, further comprising a heat sink behind the PCB, farther from the display panel than the PCB. 14. The display device of claim 11, wherein an incline surface is formed on the side of the PCB that faces the inner side surface of the bottom chassis, and the air gap is between the bottom chassis and the incline surface. 15. The display device of claim 11, wherein a side surface of the extension portion that faces the inner side surface of the bottom chassis is spaced apart from the inner side surface of the bottom chassis. 16. The display device of claim 11, further comprising a light guide panel comprising: an incidence surface that faces the plurality of LEDs to receive the light emitted by the plurality of LEDs; andan exit surface, perpendicular to the incidence surface and facing the display panel, to supply the received light to the display panel. 17. A display device comprising: a plurality of light emitting diodes (LEDs) configured to provide light to the display panel;a printed circuit board (PCB) on which the plurality of LEDs are mounted; anda bottom chassis behind an entirety of the PCB,wherein the PCB and the bottom chassis are arranged such that an air gap is between the PCB and an inner side surface of the bottom chassis,wherein a side of the PCB that faces the inner side surface of the bottom chassis comprises an extension portion that extends laterally toward the inner side surface of the bottom chassis, and another portion that is farther from the inner side surface of the bottom chassis than the extension portion, and which forms a step with the extension portion parallel to a side surface of the PCB that faces the inner side surface of the bottom chassis,wherein the plurality of LEDs emit the light in a direction parallel to a front surface of the PCB on which the plurality of LEDs are mounted, andwherein the first surface of the extension portion is in the same plane as the PCB. 18. The display device of claim 17, wherein at least one side of the PCB facing the inner side surface of the bottom chassis is spaced apart from the inner side surface of the bottom chassis. 19. The display device of claim 17, wherein an incline surface is formed on at least one side of the PCB, and the air gap is between the bottom chassis and the incline surface. 20. The display device of claim 17, wherein a side surface of the extension portion that faces the inner side surface of the bottom chassis is spaced apart from the inner side surface of the bottom chassis. 21. The display device of claim 17, wherein the air gap is between the bottom chassis and a rear surface of the extension portion, opposite a front surface of the extension portion that faces the display panel. 22. The display device of claim 17, further comprising a spacer in the air gap and formed of an insulating material. 23. The display device of claim 22, wherein a thermal conductivity of the spacer is less than a thermal conductivity of the PCB. 24. The display device of claim 17, further comprising a heat dissipation sheet entirely behind the bottom chassis.
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이 특허에 인용된 특허 (1)
Ohtsuki Terukazu,JPX ; Kimoto Masahiko,JPX ; Minematsu Hiroshi,JPX ; Tominaga Nobuyuki,JPX ; Funakoshi Takahiro,JPX ; Wada Yasuhiro,JPX ; Azuma Hitoshi,JPX, Plane-shaped lighting device and a display using such a device.
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