Nichia Corporation

Yasushi Okamoto

Koji Abe

Takuya Nakabayashi

Yoichi Bando

Satoshi Yoshinaga

Yuki Shibutani

A planar light source includes: a light guide member, a light source including a light-emitting element and a first light adjustment member and being disposed in a first hole of the light guide member, a first light-transmissive member disposed in the first hole between a lateral surface of the light source and the light guide member and on the light source, and a second light adjustment member disposed on the first light-transmissive member. A transmittance of the first light-transmissive member is higher than a transmittance of the first light adjustment member and a transmittance of the second light adjustment member with respect to light emitted from the light source. The first light-transmissive member includes a first light-transmissive portion 1ocated between the first light adjustment member and the second light adjustment member, and a second light-transmissive portion 1ocated between the lateral surface of the light source and the light guide member.

Planar light source including light adjustment members

A light-emitting device includes a package, a light-emitting element disposed on the package, and a light-transmissive member over the light-emitting element. An upper surface of the light-transmissive member and an upper surface of the package each have a plurality of projections. The light-transmissive member contains particles of light-transmissive first fillers having refractive indices smaller than the refractive index of a matrix of the light-transmissive member. Part of the particles of the first fillers is exposed to the air from the matrix of the light-transmissive member on the upper surface of the light-transmissive member.

Light-emitting device with exposed filter particles

A light emitting device includes a package having a recess, a light emitting element disposed in the recess, a translucent sealing material provided in the recess to encapsulate the light emitting element, and a film provided on the translucent sealing material. The film has a contact surface to contact the translucent sealing material and an outer surface opposite to the contact surface. The film includes a translucent base material and two or more layers of particles stacked in the translucent base material between the contact surface and the outer surface. At least one of the particles is exposed in a vicinity of the outer surface of the film.

Light emitting device

Light-emitting device having a light-transmissive member including particles of at least one first filler and method for manufacturing the same

A method for manufacturing a light emitting device includes providing a package having a recess in which a light emitting element is disposed. A translucent sealing material is provided in the recess to encapsulate the light emitting element. A film is provided on the translucent sealing material. The film includes a translucent base material and particles disposed in the translucent base material. The film has a contact surface to contact the translucent sealing material and an outer surface opposite to the contact surface. Abrasive is blasted onto the outer surface of the film to roughen the outer surface so as to expose at least one of the particles.

Growing community of inventors

Itano-gun, Japan

Yasushi Okamoto