Method and apparatus for manufacturing a light-emitting device including correction of an application amount of a fluorescent resin based on a fluorescent particle concentration
View Patent ↗A method of manufacturing a light-emitting device which includes a light-emitting source is provided by applying, onto the light-emitting source, a fluorescent resin which includes fluorescent particles and is stored in and discharged from an applicator. The method includes measuring a first concentration which is a concentration of the fluorescent particles included in the fluorescent resin discharged from the applicator; and applying, onto the light-emitting source, the fluorescent resin in an application amount determined based on the first concentration which has been measured and reference data which indicates a relationship between a concentration of the fluorescent particles and an application amount of the fluorescent resin that enables the light-emitting device to have constant chromaticity.
1. An apparatus for manufacturing a light-emitting device by applying, onto a light-emitting source, a fluorescent resin which includes fluorescent particles and is stored in and discharged from an applicator, the apparatus comprising:
a controller programmed to control an application amount of the fluorescent resin that is discharged from the applicator;
a fluorescent particle measurer configured to measure a first concentration that is a number concentration of the fluorescent particles included in the fluorescent resin discharged from the applicator by counting the fluorescent particles included in the fluorescent resin discharged from the applicator;
a storage in which reference data is stored beforehand, the reference data indicating a relationship between a number concentration of the fluorescent particles and an application amount of the fluorescent resin that enables the light-emitting device to have constant chromaticity; and
a corrector which determines, based on the first concentration and the reference data, a corrected application amount of the fluorescent resin to be applied onto the light-emitting source and notifies the controller of the corrected application amount.
2. The apparatus according to claim 1 ,
wherein the fluorescent particle measurer includes:
an optical coherence tomograph which obtains a tomographic image of the fluorescent resin discharged from the applicator; and
a first concentration calculator which calculates the first concentration based on the tomographic image.
3. The apparatus according to claim 1 ,
wherein the fluorescent particle measurer measures the first concentration at predetermined time intervals.