Lighting device, display device and television device

摘要

A backlight device (a lighting device) 12 includes LEDs (a light source) 17, a light guide plate 16, a chassis 14, LED boards 18, and heat dissipation members 19. The light guide plate 16 includes an end surface that is opposite the LEDs 17 and configured as a light entrance surface 16b through which light from the LEDs 17 enters. One of the plate surfaces of the light guide plate 16 is configured as a light exit surface 16a through which the light exits. The chassis 14 supports another plate surface 16c of the light guide plate 16 opposite from the light exit surface 16a. Each LED board 18 includes a bottom plate 18b that extends parallel to at least the other plate surface 16c of the light guide plate 16. Each heat dissipation member 19 extends parallel to a plate surface 18b1 of the bottom plate 18b and is in surface contact with the plate surface 18b1 of the bottom plate 18b.

主权项

1. A lighting device, comprising:
a light source; a light guide plate including an end surface and a plate surface, the end surface being arranged opposite the light source and configured as a light entrance surface through which light enters, the plate surface being configured as a light exit surface through which light exits; a chassis supporting another plate surface of the light guide plate, the other plate surface being opposite from the light exit surface; a light source mounting member on which the light source is mounted, the light source mounting member including a bottom plate that extends parallel to at least the other plate surface of the light guide plate; and a heat dissipation member extending parallel to a plate surface of the bottom late and being in surface contact with the plate surface of the bottom plate; wherein the bottom plate and the heat dissipation member are arranged such that the chassis is sandwiched between the other plate surface of the light guide plate and the bottom plate and the heat dissipation member, the heat dissipation member includes a chassis contact portion and a chassis non-contact portion, the chassis contact portion contacts a plate surface of the chassis opposite from the light guide plate, and the chassis non-contact portion is opposite the plate surface of the chassis opposite from the light guide plate via an air layer.