Image projection apparatus, its control method, and storage medium
AssigneeCanon Kabushiki Kaisha
InventorsTatsuya Kimoto, Ikuo Takanashi
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Abstract
An image projection apparatus includes an optical element configured to change a light amount of light emitted from the light source, an information acquirer configured to acquire information on a gradation of the image signal, a corrector configured to correct the image signal in accordance with a change in the light amount, and a controller configured to correct the image signal based on at least one of first correction data used to correct the image signal in accordance with the change in the light amount caused by controlling the optical element, and second correction data used to correct the image signal in accordance with the change in the light amount caused by controlling the supply power.
Claims10
An image projection apparatus comprising:
- an optical modulator configured to modulate light from a light source according to an image signal, the image projection apparatus being capable of projecting light modulated by the optical modulator to display an image;
- an optical element configured to change a light amount emitted from the light source;
- and
- a processor configured to:
- acquire information on a gradation of the image signal;
- correct the image signal;
- and
- control the light source and the optical element based on the information on the gradation;
- wherein the processor corrects the image signal based on first correction data used to correct the image signal in accordance with a change in a light amount caused by controlling the optical element and second correction data used to correct the image signal in accordance with a change in a light amount caused by controlling the light source.
A control method of an image projection apparatus that includes an optical modulator configured to modulate light from a light source according to an image signal, the image projection apparatus being capable of projecting light modulated by the optical modulator to display an image, the control method comprising:
- changing a light amount emitted from the light source through an optical element;
- acquiring information on a gradation of the image signal;
- correcting the image signal;
- and
- controlling the light source and the optical element based on the information of the gradation;
- wherein the correcting the image signal corrects the image signal based on first correction data used to correct the image signal in accordance with a change in a light amount caused by controlling the optical element and second correction data used to correct the image signal in accordance with a change in a light amount caused by controlling the light source.
A non-transitory computer-readable storage medium for storing a computer program that enables a computer to execute a control method of an image projection apparatus that includes an optical modulator configured to modulate light from a light source according to an image signal, the image projection apparatus being capable of projecting light modulated by the optical modulator to display an image,
- wherein the control method includes:
- changing a light amount emitted from the light source through an optical element;
- acquiring information on a gradation of the image signal;
- correcting the image signal;
- and
- controlling the light source and the optical element based on the information of the gradation;
- wherein the correcting the image signal corrects the image signal based on first correction data used to correct the image signal in accordance with a change in a light amount caused by controlling the optical element and second correction data used to correct the image signal in accordance with a change in a light amount caused by controlling the light source.
Dependencies are inferred from the claim text.