Method for producing white light emission by means of secondary light excitation and its product
First Claim
1. A method for producing white light emission by means of the secondary light excitation, wherein the light emitting component for generating violet or ultra violet light is employed to generate violet or ultra violet light with wavelength between 360˜
- 420 nm which excites the first blue phosphor to emit the light of the first spectrum, and the light of the first spectrum excites the second yellow phosphor to emit the light of the secondary spectrum, then the light of the first spectrum blends with the light of the secondary spectrum to produce white light emission.
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Abstract
A method for producing white light emission by means of secondary light excitation comprising the application of a light source such as Light Emitting diode (LED) or Laser Diode (LD) which may generate ultra violet light or violet light, with wavelength between 360˜420 nm, to excite blue phosphor to produce the broadband first exciting light spectrum having blue light as the main wave crest; the first exciting light in turn excites the yellow phosphor having lower energy level to produce the broadband secondary exciting light having yellow light as the main wave crest; the amount of the two phosphors are adjusted to some specific ratio so that the first exciting light spectrum and the secondary exciting light spectrum emitted by the phosphors enable the light-blend and complementary effect to produce a complete white light spectrum; Besides, red phosphor or green phosphor which may be excited by ultra violet or violet light may be added to adjust the color rendering effect and color temperature of the white light produced by this method and obtain other kinds of light source of different color.
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Citations
15 Claims
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1. A method for producing white light emission by means of the secondary light excitation, wherein the light emitting component for generating violet or ultra violet light is employed to generate violet or ultra violet light with wavelength between 360˜
- 420 nm which excites the first blue phosphor to emit the light of the first spectrum, and the light of the first spectrum excites the second yellow phosphor to emit the light of the secondary spectrum, then the light of the first spectrum blends with the light of the secondary spectrum to produce white light emission.
- View Dependent Claims (2, 3, 4, 5)
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6. A white light emitting component for producing white light emission by means of secondary light excitation comprising a LED chip which emits violet or ultra violet light with wavelength between 360˜
- 420 nm and a resin packing layer coated on the LED chip, wherein the resin packing layer is a mixture of packing material, blue phosphor and yellow phosphor, and the blue phosphor is selected from the group consisting of Sr10(PO4)6Cl12;
Eu2+, Ca10(PO4)6Cl12;
Eu2+, Ba10(PO4)6Cl12;
Eu2+, Sr5(PO4)3Cl;
Eu2+ and (BaMgAl10O17;
Eu2+,Mn2+), and the yellow phosphor is selected from the group consisting of Y3Al5O12;
Ce3+, Y3Ga5O12;
Ce3+, Gd3Al5O12;
Ce3+, and Gd3Ga5O12;
Ce3+. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
- 420 nm and a resin packing layer coated on the LED chip, wherein the resin packing layer is a mixture of packing material, blue phosphor and yellow phosphor, and the blue phosphor is selected from the group consisting of Sr10(PO4)6Cl12;
Specification