"The adjusting of the discharge amount of the phosphor-containing fluid resin may be performed within an adjustable range to be allowed in the LED package.
"The adjusting of the discharge amount of the phosphor-containing fluid resin may be performed to calculate the discharge amount of the phosphor-containing fluid resin by using a correlation between the deviation and the discharge amount to compensate for the deviation.
"The correlation between the deviation and the discharge amount may be obtained by dispensing different discharge amounts of the phosphor-containing fluid resin dispensed thereto to two LED packages, measuring the color coordinates of the white light emitted from the two LED packages, and then performing a calculation by using a change in the discharge amount and the deviation of the color coordinates of the two LED packages.
"The at least one LED package may be at least one LED package provided in a lead frame set on which a plurality of the LED packages are disposed, and the another LED package may be another LED package balanced in the lead frame set on which the plurality of the LED packages are disposed. In a specific case, the another LED package may further include a plurality of other LED packages in another lead frame set.
"According to another aspect, there is provided a dispensing apparatus including a dispenser including a fluid resin storage unit storing a phosphor-containing fluid resin, a discharge unit dispensing the phosphor-containing fluid resin to an LED package, and a discharge amount control unit controlling a discharge amount of the phosphor-containing fluid resin discharged from the discharge unit. The apparatus also includes a discharge amount adjuster including an electric driving unit electrically driving the LED package, and a color coordinates measuring unit detecting color coordinates of light emitted from the LED package. In addition, the apparatus includes a discharge amount calculation unit calculating the discharge amount of the phosphor-containing fluid resin, based on a deviation between the measured color coordinates and target color coordinates, to obtain the target color coordinates, and a control signal transmission unit transmitting a control signal based on the calculated discharge amount to the discharge amount control unit.
"The color coordinates measuring unit may be integrally disposed with the dispenser so as to measure color coordinates provided before the phosphor-containing fluid resin dispensed to the LED package is cured.
"Another aspect of the present disclosure provides a method of manufacturing a light emitting diode (LED) package, including dispensing a discharge amount of a phosphor-containing fluid resin to at least one LED package, and measuring color coordinates of white light emitted from the at least one LED package. The method also includes adjusting the discharge amount of the phosphor-containing fluid resin such that the measured color coordinates become approximate to the target color coordinates range. The method further includes dispensing the adjusted discharge amount of the phosphor-containing fluid resin to another LED package. In addition, the method may include repeating the aforementioned dispensing, measuring, adjusting, and dispensing steps.
BRIEF DESCRIPTION OF THE DRAWINGS
"FIG. 1 is a flowchart illustrating a method of manufacturing a light emitting device according to an embodiment of the present disclosure; FIGS. 2 and 3 show CIE 1931 chromaticity coordinates for explaining an adjustment process for target color coordinates, based on control of a discharge amount of a phosphor-containing fluid resin;
"FIG. 4 schematically shows a dispensing apparatus according to another embodiment of the present disclosure;
"FIG. 5 is an enlarged cross-sectional view of an LED package in a lead frame set shown in FIG. 4;
"FIG. 6 is CIE 1931 chromaticity coordinates for explaining a change in color coordinates accordance to an adjustable range to be allowed according to an embodiment of the present disclosure;
"FIG. 7 is a flowchart illustrating a process of deriving a correlation between a deviation and a discharge amount according to an embodiment of the present disclosure; and
"FIG. 8 illustrates a correlation between first and second discharge amounts and target reference color coordinates used in FIG. 7."
For additional information on this patent application, see: Hong, Jee Hun; Oh, Kook Jin; Oh,
Keywords for this news article include: Semiconductor, Light-emitting Diode,
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