Patent ID: 11927795
Assignee: NICHIA CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC F  H

Claim 11:
12. A planar light source, comprising:
a light guide member including a plurality of light-emitting units separated by a groove;
one or more light sources disposed in one or more of the plurality of light-emitting units; and
a light-transmissive member including a light diffusing material,
wherein the plurality of light-emitting units include a plurality of outer portions and at least one inner portion located in a region surrounded by the plurality of outer portions in a plan view,
in the plan view, at least one of the plurality of outer portions is adjacent to a smaller number of light-emitting units than a number of light-emitting units to which one of the at least one inner portion is adjacent,
in a state in which a same power is supplied and one of the plurality of outer portion and one of the at least one inner portion are allowed to individually emit light, brightness of the one of the plurality of outer portions is higher than brightness of the one of the at least one inner portion,
the light guide member includes a first surface, a second surface on a side opposite to the first surface, and a first hole portion penetrating from the first surface to the second surface and disposed in each of the plurality of light-emitting units,
the one or more light sources are disposed in the first hole portion,
the light-transmissive member is disposed in the first hole portion to cover the one or more light sources, and
a concentration of the light diffusing material in the light-transmissive member on the one of the plurality of outer portions is higher than a concentration of the light diffusing material in the light-transmissive member on the one of the at least one inner portion.