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US 10,209,133 B2Granted
Wavelength estimation device, light-source device, image display apparatus, object apparatus, wavelength estimation method, and light-source control method
AssigneeRicoh Company, Ltd.
InventorsKohji Sakai, Kazuhiro Akatsu
Life of this patent
Estimating the term…
Abstract
A wavelength estimation device including a light detector to receive light emitted from a light source and an estimation unit. The estimation unit estimates a wavelength of the light based on an amount of light received by the light detector.
Claims17
A wavelength estimation device, comprising:
- a light detector to receive unfiltered light emitted from a light source;
- a detector to detect an ambient temperature of the light source;
- and
- processing circuitry configured to estimate an oscillation wavelength of the unfiltered light when emitted from the light source, based on an amount of the unfiltered light received by the light detector,
- wherein the processing circuitry is further configured to estimate the oscillation wavelength of the light based on the amount of light received by the light detector and the ambient temperature detected by the detector.
2 more elements
A wavelength estimation method, comprising:
- receiving unfiltered light emitted from a light source;
- detecting an ambient temperature of the light source;
- and
- estimating an oscillation wavelength of the unfiltered light when emitted from the light source based on an amount of the unfiltered light received in the receiving step,
- wherein the estimating step includes estimating the oscillation wavelength based on the received amount of light and the detected ambient temperature.
2 more elements
A light-source control method, comprising
- turning on a plurality of light sources having different light-emission wavelength bandwidths to emit light;
- detecting an ambient temperature of the plurality of light sources;
- receiving, by a light detector, the light emitted from the plurality of light sources, the received light being unfiltered;
- estimating oscillation wavelengths of the unfiltered light when emitted from the plurality of light sources based on an amount of the unfiltered light received in the receiving step;
- and
- setting amounts of light emission of the plurality of light sources based on an estimation result of the estimating step,
- wherein the estimating step includes estimating the oscillation wavelengths based on the received amount of light and the detected ambient temperature.
4 more elements
Dependencies are inferred from the claim text.