Lighting device, display device, and television receiver

摘要

A lighting device maintains an optical design and absorbs expansion of a light guide plate with a simple structure if the light guide plate expands toward a light source side. A backlight unit 24 includes an LED board 30; an LED light sources 28 arranged on the LED board 30; a light guide plate 20 having a flat plate shape and including light entrance surfaces 20a1 and 20a2 on side surfaces that are provided on opposite sides, the light entrance surfaces 20a1 and 20a2 being arranged to face the LED light sources 28 of the LED board 30; and spacer members 25a (25b) regulating a distance W1 between the LED board 30 and the light guide plate 20. Each spacer member 25a (25b) has a Young's modulus smaller than that of the light guide plate 20. Each spacer member 25a (25b) regulates the distance W1 between the LED light sources 28 and the light guide plate 20 and absorbs the expansion of the light guide plate 20.

主权项

1. A lighting device comprising:
a light source board; a light source arranged on a surface of the light source board; a light guide plate formed in a flat plate shape having side surfaces that are provided on opposite sides of the light guide plate and including light entrance surfaces on the side surfaces, each of the light entrance surfaces being arranged to face the light source of the light source board; and spacer members configured to regulate a distance between the light source board and the light guide plate, each of the spacer members having Young's modulus smaller than Young's modulus of the light guide plate; wherein each of the spacer members includes a plate spring that is elastically deformed in a direction vertical to the light entrance surfaces of the light guide plate.