US 9,869,867 B2Granted

Light source device and display device

AssigneeSony Corporation

InventorShinichiro Tajiri

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Abstract

There is provided a light source device including a first light source configured to emit light in a first wavelength region, a second light source configured to emit light in a second wavelength region different from the first wavelength region, a wavelength conversion unit including a fluorescent material and configured to emit fluorescent emission light in a different wavelength region upon irradiation with the light in the first wavelength region, and a combining unit that has wavelength selectivity to a specific wavelength region corresponding to the second wavelength region and combines the light in the first wavelength region from the first light source, the light in the second wavelength region from the second light source, and the fluorescent emission light which are incident on the combining unit with one another.

Claims13

Dependent claims

A light source device, comprising:

a first light source configured to emit light in a first wavelength region;
a second light source configured to emit light in a second wavelength region different from the first wavelength region;
a wavelength conversion unit that includes a fluorescent material and is configured to emit fluorescent emission light in a third wavelength region, different from the first wavelength region and the second wavelength region, upon irradiation with the light in the first wavelength region,
wherein the light emitted from the first light source is reflected by the wavelength conversion unit that includes the fluorescent material, wherein the light reflected by the wavelength conversion unit is in the third wavelength region;
a combining unit that comprises wavelength selectivity to a specific wavelength region that corresponds to the second wavelength region and is configured to combine the light in the first wavelength region emitted from the first light source, the light in the second wavelength region emitted from the second light source, and the fluorescent emission light which are incident on the combining unit;
a first fluorescent light reflection unit between the first light source and the wavelength conversion unit,
wherein the first fluorescent light reflection unit is configured to allow the light in the first wavelength region to pass through and reflect the fluorescent emission light;
and
a second fluorescent light reflection unit different from the first fluorescent light reflection unit,
wherein the second fluorescent light reflection unit is configured to
allow the light in the first wavelength region and the fluorescent emission light reflected from the first fluorescent light reflection unit to pass through, and
reflect the light in the second wavelength region.

9 more elements

A light source device, comprising:

a first light source configured to emit light in a first wavelength region;
a second light source configured to emit light in a second wavelength region different from the first wavelength region;
a wavelength conversion unit that includes a fluorescent material and is configured to emit fluorescent emission light in a third wavelength region, different from the first wavelength region and the second wavelength region, upon irradiation with the light in the first wavelength region,
wherein the light emitted from the first light source is reflected by the wavelength conversion unit that includes the fluorescent material, wherein the light reflected by the wavelength conversion unit is in the third wavelength region;
a combining unit that comprises wavelength selectivity to a specific wavelength region that corresponds to the first wavelength region and the second wavelength region and is configured to combine the light in the first wavelength region emitted from the first light source, the light in the second wavelength region emitted from the second light source, and the fluorescent emission light which are incident on the combining unit;
a first fluorescent light reflection unit between the first light source, and the wavelength conversion unit,
wherein the first fluorescent light reflection unit is configured to allow the light in the first wavelength region to pass through and reflect the fluorescent emission light;
and
a second fluorescent light reflection unit different from the first fluorescent light reflection unit,
wherein the second fluorescent light reflection unit is configured to
allow the light in the first wavelength region and the fluorescent emission light reflected from the first fluorescent light reflection unit to pass through, and
reflect the light in the second wavelength region.

9 more elements

A display device, comprising:

a light source unit;
a light modulating/combining system configured to modulate and combine incident light;
an illumination optical system configured to guide light emitted from the light source unit to the light modulating/combining system;
and
a projection optical system configured to project an image emitted from the light modulating/combining system,
wherein the light source unit comprises:
a first light source configured to emit light in a first wavelength region;
a second light source configured to emit light in a second wavelength region different from the first wavelength region;
a wavelength conversion unit that includes a fluorescent material and is configured to emit fluorescent emission light in a third wavelength region, different from the first wavelength region and the second wavelength region, upon irradiation with the light in the first wavelength region,
wherein the light emitted from the first light source is reflected by the wavelength conversion unit that includes the fluorescent material, wherein the light reflected by the wavelength conversion unit is in the third wavelength region;
a combining unit that comprises wavelength selectivity to a specific wavelength region that corresponds to the second wavelength region and is configured to combine the light in the first wavelength region emitted from the first light source, the light in the second wavelength region emitted from the second light source, and the fluorescent emission light which are incident on the combining unit;
a first fluorescent light reflection unit between the first light source and the wavelength conversion unit,
wherein the first fluorescent light reflection unit is configured to allow the light in the first wavelength region to pass through and reflect the fluorescent emission light;
and
a second fluorescent light reflection unit different from the first fluorescent light reflection unit,
wherein the second fluorescent light reflection unit is configured to
allow the light in the first wavelength region and the fluorescent emission light reflected from the first fluorescent light reflection unit to pass through, and
reflect the light in the second wavelength region.

15 more elements

A display device, comprising:

a light source unit;
a light modulating/combining system configured to modulate and combine incident light;
an illumination optical system configured to guide light emitted from the light source unit to the light modulating/combining system;
and
a projection optical system configured to project an image emitted from the light modulating/combining system,
wherein the light source unit comprises:
a first light source configured to emit light in a first wavelength region;
a second light source configured to emit light in a second wavelength region different from the first wavelength region;
a wavelength conversion unit that includes a fluorescent material and is configured to emit fluorescent emission light in a third wavelength region, from the first wavelength region and the second wavelength region, upon irradiation with the light in the first wavelength region,
wherein the light emitted from the first light source is reflected by the wavelength conversion unit that includes the fluorescent material, wherein the light reflected by the wavelength conversion unit is in the third wavelength region;
a combining unit that comprises wavelength selectivity to a specific wavelength region that corresponds to the first wavelength region and the second wavelength region and is configured to combine the light in the first wavelength region emitted from the first light source, the light in the second wavelength region emitted from the second light source, and the fluorescent emission light which are incident on the combining unit;
a first fluorescent light reflection unit between the first light source and the wavelength conversion unit,
wherein the first fluorescent light reflection unit is configured to allow the light in the first wavelength region to pass through and reflect the fluorescent emission light;
and
a second fluorescent light reflection unit different from the first fluorescent light reflection unit,
wherein the second fluorescent light reflection unit is configured to
allow the light in the first wavelength region and the fluorescent emission light reflected from the first fluorescent light reflection unit to pass through, and
reflect the light in the second wavelength region.

15 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/205,401Filed 12 Mar 2014
Priority: JP 2013-06006022 Mar 2013
Published: US 2014/0285772 A125 Sep 2014
Granted: 16 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G02B 27/1006
Beam splitting or combining systems: for splitting or combining different wavelengths
F21V 9/30
Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters: elements containing photoluminescent…
F21V 13/08
Combinations of only two kinds of elements: the elements being filters or photoluminescent elements and reflectors
G02B 27/141
Operating by reflection only: using dichroic mirrors