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US 12,111,038 B2Granted
Light source device and display unit
AssigneeSaturn Licensing LLC
InventorsKoichi Yamamoto, Kenji Kobayashi, Yasuhiro Nishida
Life of this patent
Estimating the term…
Abstract
A light source device includes: a substrate; a plurality of light sources disposed on the substrate; a wavelength conversion member disposed to face the plurality of light sources; and a diffusion member disposed between the wavelength conversion member and the plurality of light sources, and configured to uniformize distribution of traveling direction angle of incident light.
Claims20
A display unit comprising:
- a light source device configured to emit illumination light;
- a display section configured to display an image using the illumination light from the light source device,
- wherein the light source device comprising:
- a substrate;
- a plurality of light sources disposed on the substrate;
- a wavelength conversion member comprising wavelength conversion material and disposed to face the plurality of light sources, some light from the plurality of light sources passes through the wavelength conversion member in an oblique direction without colliding with the wavelength conversion material and is emitted from the wavelength conversion member, the wavelength conversion material including quantum dot particles;
- and
- a reflective sheet disposed in a region on the substrate, the region being different from a region provided with the plurality of light sources, wherein the reflective sheet has filter characteristics allowing a reflectance to light that is wavelength-converted by the wavelength conversion member, to be different than a reflectance to light emitted from each of the light sources in which a majority of the wavelength-converted light incident on the reflective sheet is reflected and a majority of visible light incident on the reflective sheet from all other wavelengths from each of the light sources is reflected, a portion of light reflected off of the reflective sheet propagates to the wavelength conversion member and through the wavelength conversion member in an oblique direction.
5 more elements
A light source device comprising:
- a substrate;
- a plurality of light sources disposed on the substrate;
- a wavelength conversion member comprising wavelength conversion material and disposed to face the plurality of light sources, a portion of light from the plurality of light sources passes through the wavelength conversion member in an oblique direction without colliding with the wavelength conversion material and is emitted as it is from the wavelength conversion member;
- and
- a reflective sheet disposed in a region on the substrate, the region being different from a region provided with the plurality of light sources, wherein the reflective sheet has filter characteristics allowing a reflectance to light that is wavelength-converted by the wavelength conversion member, to be different than a reflectance to light emitted from each of the light sources in which a majority of the wavelength-converted light incident on the reflective sheet is reflected and a majority of visible light incident on the reflective sheet from all other wavelengths from each of the light sources is reflected, a portion of light reflected off of the reflective sheet propagates to the wavelength conversion member and through the wavelength conversion member in an oblique direction.
2 more elements
Dependencies are inferred from the claim text.