Light source control apparatus, image projection apparatus and storage medium storing light source control program
AssigneeCanon Kabushiki Kaisha
InventorKazuyuki Kuratomi
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Abstract
The light source control apparatus controls drive of multiple light sources included in a light source unit to be used in a state where the multiple light sources are lit. The multiple light sources each include multiple light-emitting elements. The light source control apparatus includes an acquirer acquiring temporal information relating to a temporal change of each of the light sources, an estimator acquiring an estimated lifetime of each of the multiple light sources by using the temporal information, and a controller decreasing, when the multiple light sources include a first light source whose estimated lifetime is shorter than a target lifetime set for the light source unit, a light emission amount of the first light source.
Claims11
A light source control apparatus configured to control driving of multiple light sources included in a light source unit that is used in a state where the multiple light sources are lit, the multiple light sources each including multiple light-emitting elements, the light source control apparatus comprising:
- a memory storing instructions;
- and
- a processor configured to implement the instructions stored in the memory and execute:
- a measuring task that measures a measurable amount of each of the light sources, the measurable amount relating to a temporal change of each of the light sources;
- a calculating task that calculates a lifetime of each of the multiple light sources using the measurable amount;
- and
- a control task that decreases, when the multiple light sources include a first light source whose calculated lifetime is shorter than a target lifetime set for the light source unit, a light emission amount of the first light source.
An image projection apparatus comprising:
- a light source control apparatus;
- and
- an optical unit configured to project an image formed by modulating, depending on an input image signal, light from a light source unit including multiple light sources whose light emissions are controlled by the light source control apparatus,
- wherein the light source control apparatus is configured to control driving of the multiple light sources that is used in a state where the multiple light sources are lit, the multiple light sources each including multiple light-emitting elements, and comprises:
- a memory storing instructions;
- and
- a processor configured to implement the instructions stored in the memory and execute:
- a measuring task that measures a measurable amount of each of the light sources, the measurable amount relating to a temporal change of each of the light sources;
- a calculating task that calculates a lifetime of each of the multiple light sources using the measurable amount;
- and
- a control task that decreases, when the multiple light sources include a first light source whose calculated lifetime is shorter than a target lifetime set for the light source unit, a light emission amount of the first light source.
A non-transitory computer-readable storage medium storing a computer program executable by a computer to execute a method of controlling driving of multiple light sources included in a light source unit that is used in a state where the multiple light sources are lit, the multiple light sources each including multiple light-emitting elements, the method comprising the steps of:
- measuring a measurable amount of each of the light sources relating to a temporal change of each of the light sources;
- calculating a lifetime of each of the multiple light sources using the measured measurable amount;
- and
- decreasing, when the multiple light sources include a first light source whose calculated lifetime is shorter than a target lifetime set for the light source unit, a light emission amount of the first light source.
Dependencies are inferred from the claim text.