Monolithic array of light emitting diodes for the generation of light at multiple wavelengths and its use for multicolor display applications
AssigneeInternational Business Machines Corporation
InventorSamuel C. Strite
Life of this patent
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Abstract
An array of light emitting diodes (LEDs) for the generation of light at multiple wavelengths. The LEDs are realized in a layered structure of semiconductor films grown on one substrate, said array comprising conducting portions for applying a bias to said LEDs and insulating portions, wherein at least one of the insulating or conducting portions is formed by a lateral variation of doping conditions of the top layer of the structure.
Claims26
A monolithic array of light emitting diodes (LEDs) for the generation of light at multiple wavelengths, comprising:
- a substrate;
- a layered structure of semiconductor films formed on the substrate including a top layer most distant from the substrate;
- a plurality of LEDs formed in the layered structure, at least one LED being a metal-insulator-semiconductor (MIS) diode including an insulating portion and a conducting portion both formed in the top layer, wherein at least one of the insulating portion and the conducting portion is formed by a lateral variation of doping conditions of the top layer.
A multicolor display comprising:
- a layered structure of semiconductor films formed on the substrate including a top layer most distant from the substrate;
- an LED array comprising a plurality of LEDs formed in the layered structure, at least one LED being a metal-insulator-semiconductor (MIS) diode including an insulating portion and a conducting portion both formed in the top layer, wherein at least one of the insulating portion and the conducting portion is formed by lateral variation of doping conditions of the top layer;
- means for addressing and applying a bias to individual LEDs in said LED array;
- and
- a mechanical mount for supporting said LED array such that individual light sources attributed to the LEDs can be viewed.
A multicolor projection display comprising:
- a layered structure of semiconductor films formed on a substrate including a top layer most distant from the substrate;
- an LED array comprising a plurality of LEDs formed in the layered structure, at least one LED being a metal-insulator-semiconductor (MIS) diode including an insulating portion and a conducting portion both formed in the top layer, wherein at least one of the insulating portion and the conducting portion is formed by lateral variation of doping conditions of the top layer;
- means for addressing and applying a bias to individual LEDs in said LED array;
- a mechanical mount for supporting said LED array such that individual light sources attributed to the LEDs can be viewed;
- and
- an optical imaging system for a projection of the light sources of the multicolor display.
A computer including a multicolor display, the multicolor display comprising:
- a layered structure of semiconductor films formed on a substrate including a top layer most distant from the substrate;
- an LED array comprising a plurality of LEDs formed in the layered structure, at least one LED being a metal-insulator-semiconductor (MIS) diode including an insulating portion and a conducting portion both formed in the top layer, wherein at least one of the insulating portion and the conducting portion is formed by lateral variation of doping conditions of the top layer;
- means for addressing and applying a bias to individual LEDs in said LED array;
- and
- a mechanical mount for supporting said LED array such that individual light sources attributed to the LEDs can be viewed.
Dependencies are inferred from the claim text.