Light emitting element and image display device using the light emitting element
First Claim
1. A light emitting element comprising:
- an active layer composed of a semiconductor which generates light;
a polarizer layer that allows a polarized component in a first direction among the lights generated in said active layer to pass therethrough, and reflects a polarized component in a second direction which is perpendicular to the first direction;
a reflective layer that is provided in the opposite side of said polarizer layer with respect to said active layer, and reflects light which has been reflected by said polarizer layer; and
a wavelength plate layer that is provided between said polarizer layer and said reflective layer, and changes polarization states of the light which has been reflected by said polarizer layer and light which has been reflected by said reflective layer, whereinsaid polarizer layer is formed on a semiconductor of the same group as said active layer and contains a semiconductor or a metal of the same group as said active layer, andsaid wavelength plate layer contains a semiconductor of the same group as said active layer.
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Accused Products
Abstract
The present invention provides a light emitting element which emits linearly polarized light, has high efficiency, can show a higher luminance and has also adequate productivity. The light emitting element that includes an active layer composed of a semiconductor which generates light includes: a polarizer layer that allows a polarized component in a first direction among the lights generated in the active layer to pass therethrough, reflects a polarized component in a second direction which is perpendicular to the first direction, is formed on a semiconductor of the same group as the active layer, and contains a semiconductor or a metal of the same group as the active layer; a reflective layer that is provided in the opposite side of the polarizer layer with respect to the active layer, and reflects light which has been reflected by the polarizer layer; and a wavelength plate layer that is provided between the polarizer layer and the reflective layer, changes polarization states of the light which has been reflected by the polarizer layer and the light which has been reflected by the reflective layer, and contains a semiconductor of the same group as the active layer.
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Citations
9 Claims
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1. A light emitting element comprising:
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an active layer composed of a semiconductor which generates light; a polarizer layer that allows a polarized component in a first direction among the lights generated in said active layer to pass therethrough, and reflects a polarized component in a second direction which is perpendicular to the first direction; a reflective layer that is provided in the opposite side of said polarizer layer with respect to said active layer, and reflects light which has been reflected by said polarizer layer; and a wavelength plate layer that is provided between said polarizer layer and said reflective layer, and changes polarization states of the light which has been reflected by said polarizer layer and light which has been reflected by said reflective layer, wherein said polarizer layer is formed on a semiconductor of the same group as said active layer and contains a semiconductor or a metal of the same group as said active layer, and said wavelength plate layer contains a semiconductor of the same group as said active layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification