LIGHTING DEVICE, DISPLAY DEVICE, AND TELEVISION DEVICE

摘要

A backlight device 12 includes LEDs 17, a light guide plate 16, an optical member 15, and heat dissipation members 30. The light guide member 16 includes light entrance surfaces 16b and a light exit surface 16a. The optical member 15 is arranged on the light exit surface 16a of the light guide plate 16. The heat dissipation members 30 are configured to dissipate heat from the LEDs 17. Each heat dissipation member 30 includes a light source mounting portion 31 to which the LEDs 17 are mounted, an extending portion 32, and protrusions 33. The extending portion 32 continues from the light source mounting portion 31 and extends from the light source mounting portion 31 along an opposite surface 16c of the light guide plate 16 from the light exit surface 16a. The protrusions 33 protrude from a surface 32a of the extending portion 32 on the light guide plate 16 side. The protrusions 33 are arranged in an extending direction of the extending portion 32 so as to be parallel to each other such that an area of the protrusions 33 per unit area decreases as a distance from the light source mounting portion 31 increases.

主权项

1. A lighting device comprising:
a light source; a light guide plate arranged opposite the light source and including a light entrance surface through which light from the light source enters, and a light exit surface through which the light exits; an optical sheet arranged on the light exit surface of the light guide plate; and a heat dissipation member to dissipate heat from the light source, the heat dissipation member including:
a light source mounting portion to which the light source is mounted;an extending portion arranged on an opposite side of the light guide plate from the light exit surface, the extending portion continuing from the light source mounting portion and extending from the light source mounting portion along an opposite surface of the light guide plate from the light exit surface; andprotrusions protruding from a surface of the extending portion on the light guide plate side, the protrusions being arranged in an extending direction of the extending portion so as to be parallel to each other and such that an area of the protrusions per unit area decreases as a distance from the light source mounting portion increases.