Array of light emitting diodes for producing gray scale light images
First Claim
1. A monolithic device for producing gray scale light images at pixels of an image zone, comprising:
- an array of selectively addressable LEDs arranged so that discrete regions of the array constitute respective pixels of the array, each array pixel having first and second LEDs addressed by a single common lead, and a third separately addressable LED interleaved between said first and second LEDs, each such array pixel LED when addressed being responsive to a forward bias voltage to emit light which forms a light image at a corresponding pixel of the image zone, whereby the selective addressing of the LEDs of the array pixels causes the addressed LEDS to emit light and produce desired gray scale light images at corresponding image zone pixels.
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Abstract
An array of addressable, electrically isolated, light emitting diodes are fabricated in the substrate of a monolithic device. Discrete regions of the array constitute respective pixels of the array. Each array pixel has at least three diodes. Two diodes are commonly addressable and a third diode interleaved between the commonly addressable diodes is separately addressable. Each diode of an array pixel, when addressed is forward biased and produces output light which is emitted from its pixel and forms a light image on a corresponding pixel of an image zone. The selectively addressing of the LEDs of the array pixels causes the addressed LEDs to emit light and provide different gray scale light images at corresponding image zone pixels.
61 Citations
7 Claims
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1. A monolithic device for producing gray scale light images at pixels of an image zone, comprising:
an array of selectively addressable LEDs arranged so that discrete regions of the array constitute respective pixels of the array, each array pixel having first and second LEDs addressed by a single common lead, and a third separately addressable LED interleaved between said first and second LEDs, each such array pixel LED when addressed being responsive to a forward bias voltage to emit light which forms a light image at a corresponding pixel of the image zone, whereby the selective addressing of the LEDs of the array pixels causes the addressed LEDS to emit light and produce desired gray scale light images at corresponding image zone pixels. - View Dependent Claims (2, 3, 4, 5, 6, 7)
Specification