ILLUMINATION DEVICE FOR DISPLAY DEVICE, LIQUID DISPLAY DEVICE, AND LIGHT SOURCE LAMP

摘要

There is provided an illumination device for a display device capable of appropriately constituting backlight of a transparent or a translucent liquid display device, reducing the number of parts and power consumption, and exhibiting excellent display quality. The illumination device for the display device includes a light diffusion layer composed of a light source lamp and a diffusion plate or a diffusion sheet. The light source lamp has a returning portion (curved portion) such as a U-shaped pipe. In the illumination device for the display device, light emitted from the curved portion of the light source lamp is at least partially weakened or shaded by using one of the following or more than one in combination: the returning portion (curved portion) of the light source lamp is covered by a lamp frame; an optical member subjected to light intensity reduction or light shading process is used for the curved portion: the curved portion is arranged in a place other than the valid display area; a member for reducing the light intensity or shading the light is attached; and a reflection member subjected to a light intensity reduction process is used.