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US 8,890,403 B2Granted
White light-emitting device and illumination device
AssigneeMitsubishi Chemical Corporation
InventorsHiroaki Sakuta, Yoshihito Satou, Naoto Kijima, Byungchul Hong
Life of this patent
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Abstract
The present invention provides a technology that allows reducing the used amount of a Mn4+-activated fluoride complex phosphor without loss of luminous efficiency, in a white light-emitting device that is provided with the Mn4+-activated fluoride complex phosphor and an LED element that is an excitation source of the phosphor. The present invention provides a white light-emitting device comprises a blue LED element, as well as a yellow phosphor and/or a green phosphor and a red phosphor as phosphors that are excited by the blue LED element. The red phosphor contains a Mn4+-activated fluoride complex phosphor and a Eu2+-activated alkaline earth silicon nitride phosphor.
Claims28
A white light-emitting device comprising:
- an LED element that emits blue light;
- and a resin composition that contains a phosphor that emits yellow light and/or a phosphor that emits green light through wavelength conversion of light emitted by the LED element that emits blue light, and a phosphor that emits red light through wavelength conversion of light emitted by the LED element that emits blue light,
- wherein the phosphor that emits red light contains at least a Mn4+-activated fluoride complex phosphor and an Eu2+-activated alkaline earth silicon nitride phosphor, and
- a content ratio of the Eu2+-activated alkaline earth silicon nitride phosphor with respect to the total of the Mn4+-activated fluoride complex phosphor and Eu2+-activated alkaline earth silicon nitride phosphor contained in the resin composition ranges from 0.5 wt % to 14.0 wt %.
1 more element
A white light-emitting device comprising:
- an LED element;
- and a resin composition that contains a phosphor that emits blue light through wavelength conversion of light emitted by the LED element, a phosphor that emits yellow light and/or a phosphor that emits green light through wavelength conversion of light emitted by the LED element, and a phosphor that emits red light through wavelength conversion of light emitted by the LED element,
- wherein the phosphor that emits red light contains at least a Mn4+-activated fluoride complex phosphor and an Eu2+-activated alkaline earth silicon nitride phosphor, and
- a content ratio of the Eu2+-activated alkaline earth silicon nitride phosphor with respect to the total of the Mn4+-activated fluoride complex phosphor and Eu2+-activated alkaline earth silicon nitride phosphor contained in the resin composition ranges from 0.5 wt % to 14.0 wt %.
1 more element
A white light-emitting device, comprising:
- an LED element that emits blue light;
- a phosphor that emits yellow light and/or a phosphor that emits green light through wavelength conversion of light emitted by the LED element that emits blue light;
- and a phosphor that emits red light through wavelength conversion of light emitted by the LED element that emits blue light;
- or comprising:
- an LED element;
- a phosphor that emits blue light through wavelength conversion of light emitted by the LED element;
- a phosphor that emits yellow light and/or a phosphor that emits green light through wavelength conversion of light emitted by the LED element;
- and a phosphor that emits red light through wavelength conversion of light emitted by the LED element,
- wherein the phosphor that emits red light contains a Mn4+-activated fluoride complex phosphor dispersed in a first translucent matrix and an Eu2+-activated alkaline earth silicon nitride phosphor dispersed in a second translucent matrix, and
- a content ratio of the Eu2+-activated alkaline earth silicon nitride phosphor with respect to the total of the Mn4+-activated fluoride complex phosphor and Eu2+-activated alkaline earth silicon nitride phosphor ranges from 0.5 wt % to 14.0 wt %.
7 more elements
A white light-emitting device comprising:
- an LED element that emits blue light;
- and a resin composition that contains a phosphor that emits yellow light and/or a phosphor that emits green light through wavelength conversion of light emitted by the LED element that emits blue light, and a phosphor that emits red light through wavelength conversion of light emitted by the LED element that emits blue light,
- wherein the phosphor that emits red light contains at least a red phosphor having a narrow-band emission spectrum such that a maximum emission peak thereof ranges from 600 nm to 660 nm and the full width at half maximum of a red emission peak is 20 nm or less, and a red phosphor having a broad-band emission spectrum such that a maximum emission peak thereof ranges from 600 nm to 660 nm and the full width at half maximum of a red emission peak is 80 nm or more, and
- a content ratio of the red phosphor having the broad-band emission spectrum with respect to the total of the red phosphor having the narrow-band emission spectrum and the red phosphor having the broad-band emission spectrum that are contained in the resin composition ranges from 0.5 wt % to 14.0 wt %.
1 more element
A white light-emitting device comprising:
- an LED element;
- and a resin composition that contains a phosphor that emits blue light through wavelength conversion of light emitted by the LED element, a phosphor that emits yellow light and/or a phosphor that emits green light through wavelength conversion of light emitted by the LED element, and a phosphor that emits red light through wavelength conversion of light emitted by the LED element,
- wherein the phosphor that emits red light contains at least a red phosphor having a narrow-band emission spectrum such that a maximum emission peak thereof ranges from 600 nm to 660 nm and the full width at half maximum of a red emission peak is 20 nm or less, and a red phosphor having a broad-band emission spectrum such that a maximum emission peak thereof ranges from 600 nm to 660 nm and the full width at half maximum of a red emission peak is 80 nm or more, and
- a content ratio of the red phosphor having the broad-band emission spectrum with respect to the total of the red phosphor having the narrow-band emission spectrum and the red phosphor having the broad-band emission spectrum that are contained in the resin composition ranges from 0.5 wt % to 14.0 wt %.
1 more element
A white light-emitting device comprising:
- an LED element that emits blue light;
- and a translucent matrix that contains a phosphor that emits yellow light and/or a phosphor that emits green light through wavelength conversion of light emitted by the LED element that emits blue light, and a phosphor that emits red light through wavelength conversion of light emitted by the LED element that emits blue light;
- or comprising:
- an LED element;
- and a translucent matrix that contains a phosphor that emits blue light through wavelength conversion of light emitted by the LED element, a phosphor that emits yellow light and/or a phosphor that emits green light through wavelength conversion of light emitted by the LED element, and a phosphor that emits red light through wavelength conversion of light emitted by the LED element,
- wherein the phosphor that emits red light contains at least a red phosphor having a narrow-band emission spectrum such that a maximum emission peak thereof ranges from 600 nm to 660 nm and the full width at half maximum of a red emission peak is 20 nm or less, and a red phosphor having a broad-band emission spectrum such that a maximum emission peak thereof ranges from 600 nm to 660 nm and the full width at half maximum of a red emission peak is 80 nm or more, and
- a content ratio of the red phosphor having the broad-band emission spectrum with respect to the total of the red phosphor having the narrow-band emission spectrum and the red phosphor having the broad-band emission spectrum that are contained in the translucent matrix ranges from 0.5 wt % to 14.0 wt %.
4 more elements
Dependencies are inferred from the claim text.