Manufacturing method of light emitting elements, and manufacturing apparatus of light emitting elements
View Patent ↗A manufacturing method of white-light emitting elements that is one example of the present invention is a manufacturing method of a white-light emitting element with the light emitting diode chip covered with the fluorescent-body-containing resin member that has been formed with the fluorescent-body-containing resin material containing a resin and fluorescent bodies, and includes: an irradiating step of irradiating the fluorescent-body-containing resin material with the blue laser beam; a measuring step of measuring the fluorescence strength of the fluorescence light emission from the fluorescent bodies that have been excited by the blue laser beam with which the irradiation has been carried out; and an applying step of applying, to the light emitting diode chip, a quantity of the fluorescent-body-containing resin material, the quantity being based on the fluorescence strength that has been measured.
1. A manufacturing apparatus of a light emitting element with a light emitting diode covered with a fluorescent-body-containing resin member that has been formed with a fluorescent-body-containing resin material containing a resin and fluorescent bodies, comprising:
an applying part that has a needle, is capable of increasing a size of a droplet while maintaining at a tip of the needle the fluorescent-body-containing resin material in a state of being the droplet, and applies to the light emitting diode the fluorescent-body-containing resin material;
a light source part that irradiates with a laser light the fluorescent-body-containing resin material that is being maintained at the tip of the needle in the state of being the droplet;
a measuring part that has a light-strength-measuring device and measures, with the light-strength-measuring device, a fluorescence strength of a fluorescence light emission from the fluorescent bodies of the fluorescent-body-containing resin material that is being maintained at the tip of the needle in the state of being the droplet that have been excited by the laser light with which irradiation has been carried out;
a comparing part that performs a comparison between the fluorescence strength that has been measured and a fluorescence strength that is a target; and
a controlling part that controls the applying part so that (i) the size of the droplet being maintained at the tip of the needle is increased while a result of the comparison by the comparing part shows that the fluorescence strength that has been measured has not reached the fluorescence strength that is the target, (ii) increasing of the size of the droplet is stopped at a point in time when the result of the comparison has shown that the fluorescence strength that has been measured has reached the fluorescence strength that is the target, and (iii) the fluorescent-body-containing resin material at the point in time, which is being maintained at the tip of the needle in the state of being the droplet, is applied.
2. The manufacturing apparatus of the light emitting element according to claim 1 , wherein
the measuring part is arranged at a position where the fluorescence light emission enters from a direction orthogonal to a direction in which the light source part carries out the irradiation with the light.
3. The manufacturing apparatus of the light emitting element according to claim 1 , wherein
a metering device is utilized that includes a dark box, and
in the dark box, the fluorescent-body-containing resin material is irradiated with the laser light, so that the fluorescence strength of the fluorescence light emission from the fluorescent bodies that have been excited by the laser light is measured in the dark box with the light-strength-measuring device.
4. The manufacturing apparatus of the light emitting element according to claim 1 , wherein
a metering device is utilized that includes a penetrating hole in a direction from an upper face to a lower face, through which the fluorescent-body-containing resin material to be applied passes, and
in a horizontal direction of the metering device, the light source part and the measuring part are positioned.