Light-emitting device and a display apparatus having a light-emitting device
First Claim
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1. A light-emitting device, comprising:
- a first filament configured to radiate first light having an intensity peak at a first wavelength by allowing a current to flow in said first filament; and
a photonic crystal structure provided surrounding said first filament, said photonic crystal structure receiving said first light from said first filament and suppressing radiation of said first light to increase an intensity of second light having an intensity peak within the visible light wavelength region, said second light radiated from said photonic crystal structure as visible light, wherein said first filament is provided with first holes, said first holes arranged periodically along a direction in which said first filament extends.
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Abstract
A light emitting device which emits visible light through heat radiation of a tungsten filament. Photonic crystal structures in each of which Ag spheres are arranged in a TiO2 film are provided around the filament. Whereas radiation of infrared light from the filament is suppressed, radiation of visible light is enhanced.
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Citations
3 Claims
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1. A light-emitting device, comprising:
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a first filament configured to radiate first light having an intensity peak at a first wavelength by allowing a current to flow in said first filament; and
a photonic crystal structure provided surrounding said first filament, said photonic crystal structure receiving said first light from said first filament and suppressing radiation of said first light to increase an intensity of second light having an intensity peak within the visible light wavelength region, said second light radiated from said photonic crystal structure as visible light, wherein said first filament is provided with first holes, said first holes arranged periodically along a direction in which said first filament extends. - View Dependent Claims (2)
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3. A light-emitting device, comprising:
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a first filament configured to radiate first light having an intensity peak at a first wavelength by allowing a current to flow in said first filament; and
a photonic crystal structure provided surrounding said first filament, said photonic crystal structure receiving said first light from said first filament and suppressing radiation of said first light to increase an intensity of second light having an intensity peak within the visible light wavelength region, said second light radiated from said photonic crystal structure as visible light, wherein said photonic crystal structure comprises a first photonic crystal body having a trench and a second photonic crystal body, said first and second photonic crystal bodies combined with each other with said trench interposed therebetween such that said first filament passes through said trench.
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Specification