Light emitting module and optical wavelength converting member
AssigneeKoito Manufacturing Co., Ltd.
InventorsYasuaki Tsutsumi, Takashi Onishi
Life of this patent
Estimating the term…
Abstract
A light emitting module is provided with a light emitting element and an optical wavelength converting member. The optical wavelength converting member includes a light incident plane, a light output plane, and an outer plane which is a plane except for said light incident plane and said light output plane. The optical wavelength converting member converts a wavelength of light emitted on the light emitting element and entered from the light incident plane into the optical wavelength converting member and outputs the wavelength-converted light from the light output plane. An average roughness “Ra” of at least a portion of the outer plane is lower than an average roughness of the light output plane.
Claims14
A light emitting module comprising:
- a light emitting element;
- and
- an optical wavelength converting member,
- wherein the optical wavelength converting member includes a light incident plane facing the light emitting element, a light output plane, and an outer plane which is a plane except for said light incident plane and said light output plane,
- wherein the optical wavelength converting member is adapted to convert a wavelength of light emitted from the light emitting element and entered from the light incident plane into the optical wavelength converting member and to output the wavelength-converted light from the light output plane,
- wherein an average roughness “Ra” of the light output plane is larger than 0.3 micrometers,
- wherein an average roughness “Ra” of at least a portion of the outer plane is lower than an average roughness of the light output plane,
- wherein said average roughness “Ra” of said portion of the outer plane is smaller than, or equal to 0.3 micrometers, and larger than or equal to 0.020 micrometers, and
- wherein a photon ratio between the light output plane and the outer plane exceeds 0.5.
A light emitting module comprising:
- a light emitting element;
- and
- an optical wavelength converting member,
- wherein the optical wavelength converting member includes a light incident plane facing the light emitting element, a light output plane, and an outer plane which is a plane except for said light incident plane and said light output plane,
- wherein the optical wavelength converting member is adapted to convert a wavelength of light emitted from the light emitting element and entered from the light incident plane into the optical wavelength converting member and to output the wavelength-converted light from the light output plane,
- wherein an average roughness “Ra” of the light output plane is larger than 0.3 micrometers,
- wherein an average roughness “Ra” of at least a portion of the outer plane is lower than an average roughness of the light output plane,
- wherein said average roughness “Ra” of said portion of the outer plane is smaller than, or equal to ¼ of a central wavelength of said wavelength-converted light, and larger than or equal to 0.020 micrometers, and
- wherein a photon ratio between the light output plane and the outer plane exceeds 0.5.
An optical wavelength converting member comprising:
- a light incident plane;
- a light output plane, and
- an outer plane which is a plane except for said light incident plane and said light output plane,
- wherein the optical wavelength converting member is adapted to convert a wavelength of light entered from the light incident plane into the optical wavelength converting member and to output the wavelength-converted light from the light output plane,
- wherein an average roughness “Ra” of the light output plane is larger than 0.3 micrometers.
- wherein an average roughness “Ra” of at least a portion of the outer plane is lower than an average roughness of the light output plane, and
- wherein said average roughness “Ra” of said portion of the outer plane is smaller than, or equal to 0.3 micrometers, and larger than or equal to 0.020 micrometers, and
- wherein a photon ratio between the light output plane and the outer plane exceeds 0.5.
Dependencies are inferred from the claim text.