Light emitting device
AssigneePanasonic Corporation
InventorYuko MATSUHISA
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Abstract
Provided is a light-emitting device exhibiting a high light-emission efficiency and moreover may utilize an external light radiating from the back side. A light-emitting device has a light-emitting element and a reflective layer reflecting light emitted from the light-emitting element. The reflective layer has a first layer constituted from a liquid crystal having a helical structure; a second layer disposed on opposite side of the first layer from the light-emitting element, and constituted from a liquid crystal having a helical structure with the same twisting direction as the first layer; and a third layer interposed therebetween to divide a light transmitted through the third layer itself into two intrinsic polarized lights causing a phase difference between the two intrinsic polarized lights.
Claims11
A light-emitting device comprising a light-emitting element and a reflective layer reflecting light emitted from the light-emitting element,
- said reflective layer having:
- a first layer constituted from a liquid crystal of a helical structure;
- a second layer disposed on an opposite of said first layer from said light emitting element and constituted from a liquid crystal having a helical structure with the same twisting direction as said first layer;
- and
- a third layer interposed between said first layer and said second layer and configured to divide light transmitted through said third layer itself into two intrinsic polarized lights and cause a phase difference between the two intrinsic polarized lights,
- wherein said light-emitting element has a light-emission wavelength region which is overlapped with a selective reflection wavelength region of said first layer and a selective reflection wavelength region of said second layer.
Dependencies are inferred from the claim text.