ILLUMINATING DEVICE, DISPLAY DEVICE, AND TELEVISION RECEIVER

摘要

Brightness is less likely to be deteriorated and a heat release property is ensured in a lighting device. A backlight unit 12 includes cold cathode tubes 18 as a light source, a chassis 14 and lamp holders 20 as a cover member. Each cold cathode tube 18 has an electrode portion 18b at its end portion 18E and the light sources 18 are housed in the chassis 14. The lamp holder 20 extends along one side (a short-side direction) of the chassis 14 and covers the end portions 18E of the cold cathode tubes 18. The lamp holder 20 includes opening portions 26 that are open toward a middle portion of the cold cathode tube 18. An opening area of the opening portion 26 is greater in one of end portions (a first end portion 20A and a second end portion 20B) of the lamp holder 20 in an extending direction of the lamp holder 20 than in a middle portion 20C of the lamp holder 20.