Adapting short-wavelength LED's for polychromatic, broadband, or “white” emission
First Claim
1. A device comprising an LED capable of emitting light and bonded to a semiconductor construction capable of converting at least a portion of the emitted light to a longer wavelength light and being partially transparent to the emitted light;
- the semiconductor construction comprising a potential well and a light absorbing layer, wherein the light absorbing layer comprises a CdMgZnSe alloy.
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Abstract
An adapted LED is provided comprising a short-wavelength LED and a re-emitting semiconductor construction, wherein the re-emitting semiconductor construction comprises at least one potential well not located within a pn junction. The potential well(s) are typically quantum well(s). The adapted LED may be a white or near-white light LED. The re-emitting semiconductor construction may additionally comprise absorbing layers surrounding or closely or immediately adjacent to the potential well(s). In addition, graphic display devices and illumination devices comprising the adapted LED according to the present invention are provided.
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Citations
33 Claims
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1. A device comprising an LED capable of emitting light and bonded to a semiconductor construction capable of converting at least a portion of the emitted light to a longer wavelength light and being partially transparent to the emitted light;
- the semiconductor construction comprising a potential well and a light absorbing layer, wherein the light absorbing layer comprises a CdMgZnSe alloy.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A device comprising an LED capable of emitting light and bonded to a semiconductor construction capable of converting at least a portion of the emitted light to a longer wavelength light and being partially transparent to the emitted light;
- the semiconductor construction comprising a potential well and a light absorbing layer, wherein the light absorbing layer is closely adjacent the potential well.
- View Dependent Claims (28, 29, 30, 31, 32)
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33. A device comprising an LED capable of emitting light and bonded to a semiconductor construction capable of converting at least a portion of the emitted light to a longer wavelength light and being partially transparent to the emitted light, wherein the semiconductor construction comprises at least one first potential well not located within a pn junction having a first transition energy corresponding to blue-wavelength light, at least one second potential well not located within a pn junction having a second transition energy corresponding to green-wavelength light, and at least one third potential well not located within a pn junction having a third transition energy corresponding to red-wavelength light.
Specification