Manufacturing method of LED light emitting device
View Patent ↗Disclosed are an LED light emitting device and its manufacturing method. A blue LED chip specification is selected, a green phosphor and the blue LED chip are used to determine a green light frame on the CIE1931 chromaticity coordinates and a red phosphor together with a blue LED chip are used to determine a red light frame on the CIE1931 chromaticity coordinates, and a predetermined straight line passing through the color temperature target frame is selected, and both end points of the predetermined straight line fall within the green light frame and the red light frame, so as to determine the concentration of the green phosphor and the red phosphor, and the green and red phosphors and a blue LED chip are packaged to form a first LED and a second LED, and at least one first LED and at least one second LED are installed on a substrate.
1. A manufacturing method of an LED light emitting device capable of adjusting color temperature easily, provided for expressing at least one color temperature within a color temperature target frame and in compliance with the CIE1931 chromaticity coordinates specified by ANSI, comprising the steps of:
selecting a first blue LED chip and a second blue LED chip having a same specification;
using a green phosphor together with the first blue LED chip to determine a green light frame in the CIE1931 chromaticity coordinates;
using a red phosphor together with the second blue LED chip to determine a red light frame in the CIE1931 chromaticity coordinates;
selecting a predetermined straight line passing through the color temperature target frame, and one end point of the predetermined straight line falling within the green light frame and an another end point of the predetermined straight line falling within the red light frame, so as to determine a concentration of the green phosphor and a concentration of the red phosphor; wherein the green phosphor and the first blue LED chip are packaged into an integrally formed first LED, and the red phosphor and the second blue LED chip are packaged into an integrally formed second LED, and at least one first LED and at least one second LED are installed on a substrate, and
using a quantity of the first LEDs and a quantity of the second LEDs to adjust a brightness ratio of the first LED to the second LED, so that the overall color temperature of the LED light emitting device oscillates in the predetermined straight line in the color temperature target frame,
wherein the first and the second blue LED chip have a wavelength of 400 nm-480 nm, and the red phosphor emits a red light having wavelength of 600 nm-650 nm after being excited, and the green phosphor emits a green light having wavelength of 515 nm-560 nm after being excited,
wherein the color temperature target frame has a range defined by the CIE1931 chromaticity coordinates (0.481,0.431), (0.459,0.394), (0.430,0.417) and (0.415,0.382); the green light frame has a range defined by the CIE1931 chromaticity coordinates (0.44,0.50), (0.44,0.55), (0.26,0.62), (0.27,0.40) and (0.39,0.45); and the red light frame has a range defined by the CIE1931 chromaticity coordinates (0.52,0.35), (0.56,0.39), (0.64,0.30), (0.47,0.16) and (0.46,0.32),
wherein the brightness ratio of the first LED to the second LED is 1.2-2.0.
2. A manufacturing method of an LED light emitting device capable of adjusting color temperature easily, provided for expressing at least one color temperature within a color temperature target frame and in compliance with the CIE1931 chromaticity coordinates specified by ANSI, comprising the steps of:
selecting a first blue LED chip and a second blue LED chip having a same specification;
using a green phosphor together with the first blue LED chip to determine a green light frame in the CIE1931 chromaticity coordinates;
using a red phosphor together with the second blue LED chip to determine a red light frame in the CIE1931 chromaticity coordinates;
selecting a predetermined straight line passing through the color temperature target frame, and one end point of the predetermined straight line falling within the green light frame and an another end point of the predetermined straight line falling within the red light frame, so as to determine a concentration of the green phosphor and a concentration of the red phosphor; wherein the green phosphor and the first blue LED chip are packaged into an integrally formed first LED, and the red phosphor and the second blue LED chip are packaged into an integrally formed second LED, and at least one first LED and at least one second LED are installed on a substrate, and
using a quantity of the first LEDs and a quantity of die second LEDs to adjust a brightness ratio of the first LED to the second LED, so that the overall color temperature of the LED light emitting device oscillates in the predetermined straight line in the color temperature target frame,
wherein the first and the second blue LED chip have a wavelength of 400 nm-480 nm, and the red phosphor emits a red light having wavelength of 600 nm-650 nm after being excited, and the green phosphor emits a green light having wavelength of 515 nm-560 nm after being excited,
wherein the color temperature target frame has a range defined by the CIE1931 chromaticity coordinates (0.481,0.431), (0.459,0.394), (0.430,0.417) and (0.415.0.382); the green light frame has a range defined by the CIE1931 chromaticity coordinates (0.44,0.50), (0.44,0.55), (0.26,0.62), (0.27,0.40) and (0.39.0.45); and the red light frame has a range defined by the CIE1931 chromaticity coordinates (0.52,0.35), (0.56,0.39), (0.64,0.30), (0.47,0.16) and (0.46,0.32),
wherein the brightness ratio of the first LED to the second LED is 2.2-3.2.
3. A manufacturing method of an LED light emitting device capable of adjusting color temperature easily, provided for expressing at least one color temperature within a color temperature target frame and in compliance with the CIE1931 chromaticity coordinates specified by ANSI, comprising the steps of:
selecting a first blue LED chip and a second blue LED chip having a same specification;
using a green phosphor together with the first blue LED chip to determine a green light frame in the CIE1931 chromaticity coordinates;
using a red phosphor together with the second blue LED chip to determine a red light frame in the CIE1931 chromaticity coordinates;
selecting a predetermined straight line passing through the color temperature target frame, and one end point of the predetermined straight line falling within the green light frame and an another end point of the predetermined straight line falling within the red light frame, so as to determine a concentration of the green phosphor and a concentration of the red phosphor; wherein the green phosphor and the first blue LED chip are packaged into an integrally formed first LED, and the red phosphor and the second blue LED chip are packaged into an integrally formed second LED, and at least one first LED and at least one second LED are installed on a substrate, and
using a quantity of the first LEDs and a quantity of die second LEDs to adjust a brightness ratio of the first LED to the second LED, so that the overall color temperature of the LED light emitting device oscillates in the predetermined straight line in the color temperature target frame,
wherein the first and the second blue LED chip have a wavelength of 400 nm-480 nm, and the red phosphor emits a red light having wavelength of 600 nm-650 nm after being excited, and the green phosphor emits a green light having wavelength of 515 nm-560 nm after being excited,
wherein the color temperature target frame has a range defined by the CIE1931 chromaticity coordinates (0.481,0.431), (0.459,0.394), (0.430,0.417) and (0.415.0.382); the green light frame has a range defined by the CIE1931 chromaticity coordinates (0.44,0.50), (0.44,0.55), (0.26,0.62), (0.27,0.40) and (0.39.0.45); and the red light frame has a range defined by the CIE1931 chromaticity coordinates (0.52,0.35), (0.56,0.39), (0.64,0.30), (0.47,0.16) and (0.46,0.32),
wherein the brightness ratio of the first LED to the second LED is 3.6-4.2.