Patent ID: 11960170
Assignee: FUNAI ELECTRIC CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A backlight device comprising:
a plurality of point light sources;
a luminance uniformity sheet configured to uniform luminance of light from the point light sources and including transmission portions that are arranged opposite the point light sources and are configured to transmit the light from the point light sources;
a light diffusion sheet disposed on an opposite side of the luminance uniformity sheet relative to the point light sources and configured to diffuse the light from the point light sources;
a plurality of lenses disposed between the light diffusion sheet and the luminance uniformity sheet and configured to convert light transmitted through the transmission portions of the luminance uniformity sheet into parallel light or light that is slightly diffused over a range smaller than a range of an incident angle of the light transmitted through the transmission portions; and
a partition wall disposed between the luminance uniformity sheet and the lenses and between the luminance uniformity sheet and the light diffusion sheet, the partition wall being further disposed between adjacent point light sources in a plan view or between adjacent lenses in the plan view.