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US 2010/0244731 A1Published application
White light emitting diode, white light emitting apparatus, and linear illuminator using the same
AssigneeCanon Components, Inc.
InventorsTakahiro Kaihotsu, Shozo Asai
Life of this patent
Estimating the term…
Abstract
A white light emitting apparatus (20) is provided with a first white light emitting diode (11) that emits yellowish white and a second white light emitting diode (12) that emits bluish white in the same direction of the light emitted from the first white light emitting diode (11). The white light emitting apparatus (20) is further provided with a current control circuit that controls drive currents of the first and second white light emitting diodes (11, 12).
Claims13
A white light emitting apparatus, comprising:
- a first white light emitting diode emitting yellowish white;
- a second white light emitting diode emitting bluish white in the same direction of emission by the first white light emitting diode;
- and
- a current controller controlling drive currents of the first and second white light emitting diodes.
1 more element
A white light emitting diode, comprising:
- first and second blue light emitting diode chips;
- and
- a wavelength conversion layer for wavelength conversion of a part of blue light from the first and second blue light emitting diode chips into yellow light, wherein
- the wavelength conversion layer
- emits yellowish white after wavelength conversion of a part of blue light from the first blue light emitting diode chip into yellow light, and
- emits bluish white after wavelength conversion of a part of blue light from the second blue light emitting diode chip into yellow light.
3 more elements
A white light emitting apparatus, comprising:
- first and second blue light emitting diode chips;
- a wavelength conversion layer for wavelength conversion of a part of blue light from the first and second blue light emitting diode chips into yellow light;
- and
- a current controller controlling drive currents of the first and second blue light emitting diode chips, wherein
- color mixture with the yellow light obtained by the wavelength conversion of a part of blue light from the first blue light emitting diode chip by the wavelength conversion layer and the remained part of blue light from the first blue light emitting diode chip results in yellowish white, and
- color mixture with the yellow light obtained by the wavelength conversion of a part of blue light from the second blue light emitting diode chip by the wavelength conversion layer and the remained part of blue light from the second blue light emitting diode chip results in bluish white.
3 more elements
A linear illuminator, comprising:
- a white light emitting apparatus;
- and
- a light guide member guiding a light incident from the white light emitting apparatus and linearly illuminating an object to be illuminated, wherein
- the white light emitting apparatus comprises:
- a first white light emitting diode emitting yellowish white;
- a second white light emitting diode emitting bluish white in the same direction of emission by the first white light emitting diode;
- and
- a current controller controlling drive currents of the first and second white light emitting diodes.
5 more elements
A linear illuminator, comprising:
- a white light emitting apparatus;
- and
- a light guide member guiding a light incident from the white light emitting apparatus and linearly illuminating an object to be illuminated, wherein
- the white light emitting apparatus comprises:
- first and second blue light emitting diode chips;
- a wavelength conversion layer for wavelength conversion of a part of blue light from the first and second blue light emitting diode chips into yellow light;
- and
- a current controller controlling drive currents of the first and second blue light emitting diode chips, wherein
- color mixture with the yellow light obtained by the wavelength conversion of a part of blue light from the first blue light emitting diode chip by the wavelength conversion layer and the remained part of blue light from the first blue light emitting diode chip results in yellowish white, and
- color mixture with the yellow light obtained by the wavelength conversion of a part of blue light from the second blue light emitting diode chip by the wavelength conversion layer and the remained part of blue light from the second blue light emitting diode chip results in bluish white.
7 more elements
A linear illuminator, comprising:
- a white light emitting diode;
- and
- a light guide member guiding a light incident from the white light emitting diode and linearly illuminating an object to be illuminated, wherein
- the white light emitting diode comprises:
- first and second blue light emitting diode chips;
- and
- a wavelength conversion layer for wavelength conversion of a part of blue light from the first and second blue light emitting diode chips into yellow light, wherein
- color mixture with the yellow light obtained by the wavelength conversion of a part of blue light from the first blue light emitting diode chip by the wavelength conversion layer and the remained part of blue light from the first blue light emitting diode chip results in yellowish white, and
- color mixture with the yellow light obtained by the wavelength conversion of a part of blue light from the second blue light emitting diode chip by the wavelength conversion layer and the remained part of blue light from the second blue light emitting diode chip results in bluish white.
6 more elements
Dependencies are inferred from the claim text.