Projector, method that adjusts luminance of projected image, and program
AssigneeNEC Display Solutions, Ltd.
InventorTakeshi Kato
Life of this patent
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Abstract
A projector that projects an image to a projection object using light emitted from a light source lamp, including a light adjustment sensor that measures the projection distance to the projection object and the intensity of reflected light from the projection object; a zoom position sensor that detects a zoom ratio; and a control section that adjusts the intensity of light emitted from the light source lamp based on the projection distance and the reflected light intensity measured by the adjustment sensor and the zoom ratio detected by the zoom position sensor so as to keep the luminance of a projection image displayed on the projection object constant.
Claims7
A projector that projects an image to a projection object using light emitted from a light source lamp, comprising:
- a light adjustment sensor that measures a projection distance to said projection object and an intensity of reflected light from said projection object;
- a zoom position sensor that detects a zoom ratio;
- and
- a control section that adjusts an intensity of light emitted from said light source lamp based on the projection distance and the difference between the intensity of the reflected light measured by said adjustment sensor and a reference intensity in which a reference screen is a projection object and the zoom ratio detected by said zoom position sensor so as to keep the luminance of a projection image displayed on said projection constant.
A method that adjusts a projection image for a projector that projects an image to a projection object using light emitted from a light source lamp, comprising:
- a process that measures a projection distance to said projection object and an intensity of reflected light from said projection object;
- a process that detects a zoom ratio;
- and
- a process that adjusts an intensity of light emitted from said light source lamp based on the projection distance and the difference between the intensity of the reflected light that have been measured and a reference intensity in which a reference screen is a projection object and the zoom ratio that has been detected so as to keep the luminance of a projection image displayed on said projection object constant.
A non-transitory computer readable recording medium in which a program is recorded, said program that causes a projector that projects an image to a projection object using light emitted from a light source lamp to realize functions comprising:
- a function that measures a projection distance to said projection object and an intensity of reflected light from said projection object;
- a function that detects a zoom ratio;
- and
- a function that adjusts an intensity of light emitted from said light source lamp based on the projection distance and the difference between the intensity of the reflected light that have been measured and a reference intensity in which a reference screen is a projection object and the zoom ratio that has been detected so as to keep the luminance of a projection image displayed on said projection object constant.
Dependencies are inferred from the claim text.