Fluorescent member and light-emitting module
AssigneeKoito Manufacturing Co., Ltd.
InventorsHisayoshi Daicho, Yu Shinomiya
Life of this patent
Estimating the term…
Abstract
A fluorescent member includes: a wavelength converter including an incidence part on which a light of a light source is incident and an output part from which a converted light subjected to wavelength conversion as a result of excitation by an incident light is output; and a reflecting part provided in at least a portion of a surface of the wavelength converter. The wavelength converter is comprised of a material whereby a degree of scattering of the light of the light source incident via the incidence part and traveling toward the output part is smaller than in the case of a polycrystalline material.
Claims15
A fluorescent member comprising:
- a wavelength converter including an incident part on which a light of a light source is incident and an output part from which a converted light subjected to wavelength conversion as a result of excitation by an incident light is output;
- and
- a reflecting part provided in at least a portion of a surface of the wavelength converter, wherein
- the wavelength converter is made of a monocrystal material,
- the monocrystal material is an optically anisotropic birefringence crystal, and
- an angle formed by a principal axis of the birefringence crystal, which is a direction in which birefringence does not occur, and a straight line connecting the incidence part and the output part is within ±5°.
A light emitting module comprising:
- a light source;
- and
- a wavelength converter including an incidence part on which a light of the light source is incident and an output part from which a converted light subjected to wavelength conversion as a result of excitation by an incident light is output, wherein
- the wavelength converter is made of a monocrystal material,
- the monocrystal material is an optically anisotropic birefringence crystal, and
- an angle formed by a principal axis of the birefringence crystal, which is a direction in which birefringence does not occur, and a straight line connecting the incidence part and the output part is within ±5°.
A light emitting module comprising:
- a light source;
- a wavelength converter including an incidence part on which a light of the light source is incident, an output part from which a converted light subjected to wavelength conversion as a result of excitation by an incident light is output and a side surface different from the incidence part and the output part;
- and
- a heat dissipation part provided to cover at least a portion of the side surface, wherein
- the wavelength converter is made of a monocrystal material and configured to impart directionality to the light of the light source incident via the incidence part,
- the monocrystal material is an optically anisotropic birefringence crystal, and
- an angle formed by a principal axis of the birefringence crystal, which is a direction in which birefringence does not occur, and a straight line connecting the incidence part and the output part is within ±5°.
Dependencies are inferred from the claim text.