Flat-panel light emitting pixel with luminance feedback
AssigneeEastman Kodak Company
InventorsPaul P. Lee, Ronald S. Cok
Life of this patent
Estimating the term…
Abstract
An image display includes an addressable image display pixel, having a substrate; a light emitter formed on the substrate; a photo-sensor formed on the substrate and optically coupled to the light emitter to detect light emitted by the light emitter to generate a feedback voltage signal in response to light emitted by the light emitter; and, a feedback readout circuit formed on the substrate and responsive to the feedback voltage signal to provide a feedback signal representing the light output of the light emitter, the feedback readout circuit including a transistor amplifier, means for resetting the readout circuit, and a select switch.
Claims25
An addressable image display pixel, comprising:
- a) a substrate;
- b) a light emitter formed on the substrate;
- c) a photo-sensor formed on the substrate and optically coupled to the light emitter to detect light emitted by the light emitter to generate a feedback voltage signal in response to light emitted by the light emitter;
- and,
- d) a feedback readout circuit formed on the substrate and responsive to the feedback voltage signal to provide a feedback signal representing the light output of the light emitter, the feedback readout circuit including a transistor amplifier, means for resetting the readout circuit, and a select switch.
A display device, comprising:
- a) display pixel array, having
- i) a substrate;
- and
- ii) a plurality of addressable image display pixels formed on the substrate, each image display pixel including a light emitter, a photo-sensor optically coupled to the light emitter to detect light emitted by the light emitter to generate a feedback voltage signal in response to light emitted by the light emitter;
- and, a feedback readout circuit formed on the substrate and responsive to the feedback voltage signal to provide a feedback signal representing the light output of the light emitter, the feedback readout circuit including a transistor amplifier, means for resetting the readout circuit, and a select switch;
- and
- b) a display control circuit for receiving display input signals and modifying the display input signals in response to the feedback signals from the addressable display pixels.
Dependencies are inferred from the claim text.