BACKLIGHT DEVICE, IMAGE-FORMING APPARATUS AND TELEVISION RECEIVER Russian patent published in 2012 - IPC F21S2/00 

FIELD: physics.

SUBSTANCE: disclosed backlight device 12 includes a plurality of light sources and an optical element located nearer to the light output area 15z than the light sources 17. The optical element 15 includes a prismatic plate 15a of a scatterer for scattering light from the light sources 17 and coming out of a lens sheet 15c located near to the light output area 15z than the prismatic plate 15a of the scatterer. The prismatic plate 15a of the scatterer has prisms on the surface lying on the side nearer to the light output area 15z. The lens sheet 15c has convex lenses 62 on the surface nearer to the light output area 15z.

EFFECT: illumination without noticeable shadows of the light sources, which enables to make very thin image-forming apparatus.

14 cl, 17 dwg