Resin application apparatus, optical property correction apparatus and method, and method for manufacturing LED package
View Patent ↗A resin application apparatus includes: an optical property measurement unit measuring an optical property of light emitted from a light emitting diode (LED) chip which is mounted on a package body and to which transparent resin is not applied; and a resin application unit applying light conversion material-containing transparent resin to the LED chip in accordance with a resin application amount which is decided depending on the optical property measured by the optical measurement unit.
1. An LED package manufacturing method for an LED package array comprising a plurality of LED packages, the method comprising steps of:
applying an electrical signal to the plurality of LED packages, and measuring a chromaticity of light emitted from each of the plurality of LED packages, wherein the plurality of LED packages are provided for measuring in a state in which phosphor-containing resin non-cured;
calculating an additional amount of phosphor-containing resin to be dispensed to the LED packages deviating from the target chromaticity by comparing the measured chromaticity with a predetermined target chromaticity; and
dispensing phosphor-containing resin to each of the LED packages deviating from the target chromaticity in an amount corresponding to the calculated additional amount of phosphor-containing resin to be dispensed, wherein the LED packages are provided for measuring in a state in which phosphor-containing resin is non-cured.
2. The LED package manufacturing method of claim 1 , further comprising primarily dispensing the phosphor-containing resin to the LED package, before the measuring of the chromaticity.
3. The LED package manufacturing method of claim 1 , wherein, in the calculating of the additional amount of phosphor-containing resin to be dispensed,
the additional amount of phosphor-containing resin is decided so that the measured chromaticity falls within a target chromaticity range.
4. The LED package manufacturing method of claim 1 , wherein a package array in which a plurality of LED packages are arranged in an array is provided for measuring the chromaticity of light, a positive electrode and a negative electrode of each LED package in the package array being electrically insulated from each other.
5. The LED package manufacturing method of claim 4 , wherein the respective LED packages are electrically insulated from each other.
6. The LED package manufacturing method of claim 1 , further comprising presetting an additional amount of phosphor-containing resin to be dispensed for moving the measured chromaticity to the target chromaticity, before the measuring of the chromaticity of light emitted from LED package.
7. The LED package manufacturing method of claim 6 , wherein the presetting of the additional amount of phosphor-containing resin to be dispensed comprises:
a first operation of measuring a chromaticity of light emitted from the LED package to which phosphor-containing resin is primarily dispensed;
a second operation of additionally dispensing a constant fine amount of phosphor-containing resin to the LED package;
a third operation of measuring a chromaticity of light emitted from the LED package to which the constant fine amount of phosphor-containing resin is dispensed;
when the chromaticity measured in the third operation does not reach the target chromaticity, repeating the second and third operations until the chromaticity measured in the third operation reaches the target chromaticity; and
setting an additional dispensing amount of phosphor-containing resin for moving the measured chromaticity to the target chromaticity, by using the correlation between the amount of phosphor-containing resin and the chromaticity measured when the chromaticity reaches the target chromaticity.
8. The LED package manufacturing method of claim 1 , wherein, when measuring a chromaticity of light emitted from each of the plurality of LED packages, a positive electrode and a negative electrode of each LED package in the package array are electrically insulated from each other.
9. The LED package manufacturing method of claim 1 , wherein respective LED packages are electrically insulated from each other.