Projector and focus adjustment method
First Claim
1. A projector comprising:
- a projection lens of which a focus lens is movable along an optical axis;
a focus adjustment unit for moving said focus lens;
an acceleration sensor for detecting acceleration of a housing in which said projection lens is arranged;
a determination unit for determining whether said housing is in a stationary state or in a moving state in accordance with an output of said acceleration sensor and for determining a direction to which said housing has moved and a distance that said housing has moved, respectively, in accordance with an output of said acceleration sensor when said housing is in the moving state; and
a control unit for determining a direction and a distance that said focus lens is to be moved in accordance with the direction and the distance that said housing has moved, which are supplied from said determination unit and for controlling movement of said focus lens by said focus adjustment unit in accordance with the determined direction and the determined distance of said focus lens.
2 Assignments
0 Petitions
Accused Products
Abstract
A transportable projector includes a focus adjustment unit for moving a focus lens in a projection lens, an acceleration sensor for detecting acceleration in a direction along an optical axis of the projection lens in the projector, a determination unit for determining whether the projector is in a stationary state or in a moving state in accordance with an output of the acceleration sensor and for respectively determining the direction to which the projector has moved and the distance that the projector has moved in accordance with an output of the acceleration sensor, and a control unit for controlling movement of the focus lens by the focus adjustment unit in accordance with the determined direction and the determined distance of the projector.
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Citations
15 Claims
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1. A projector comprising:
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a projection lens of which a focus lens is movable along an optical axis;
a focus adjustment unit for moving said focus lens;
an acceleration sensor for detecting acceleration of a housing in which said projection lens is arranged;
a determination unit for determining whether said housing is in a stationary state or in a moving state in accordance with an output of said acceleration sensor and for determining a direction to which said housing has moved and a distance that said housing has moved, respectively, in accordance with an output of said acceleration sensor when said housing is in the moving state; and
a control unit for determining a direction and a distance that said focus lens is to be moved in accordance with the direction and the distance that said housing has moved, which are supplied from said determination unit and for controlling movement of said focus lens by said focus adjustment unit in accordance with the determined direction and the determined distance of said focus lens. - View Dependent Claims (2, 3)
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4. A projector system comprising:
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a projector having a projection lens in which a focus lens is movable along an optical axis; and
a projection structure body on which an image is projected by said projection lens and which is movable;
wherein said projection structure body comprises an acceleration sensor for detecting acceleration of said projection structure body; and
wherein said projector comprises a focus adjustment unit for moving said focus lens;
a determination unit for determining whether said projection structure body is in a stationary state or in a moving state in accordance with an output of said acceleration sensor and for determining a direction to which said projection structure body has moved and a distance that said projection structure body has moved, respectively, in accordance with an output of said acceleration sensor when said projection structure body is in the moving state; and
a control unit for determining a direction and a distance that said focus lens is to be moved in accordance with the direction and the distance that said projection structure body has moved, which are supplied from said determination unit and for controlling movement of said focus lens by said focus adjustment unit in accordance with the determined direction and the determined distance of said focus lens. - View Dependent Claims (5, 6)
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7. A projector system comprising:
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a projector having a projection lens in which a focus lens is movable along an optical axis; and
a projection structure body on which an image is projected by said projection lens and which is movable;
wherein said projection structure body comprises a first acceleration sensor for detecting acceleration of said projection structure body; and
wherein said projector comprises a focus adjustment unit for moving said focus lens;
a second acceleration sensor for detecting acceleration of a housing in which said projection lens is arranged;
a determination unit for determining whether said projection structure body is in a stationary state or in a moving state in accordance with an output of said first acceleration sensor and for determining a direction to which said projection structure body has moved and a distance that said projection structure body has moved, respectively, in accordance with an output of said first acceleration sensor when said projection structure body is in the moving state, and for determining whether said housing is in a stationary state or in a moving state in accordance with an output of said second acceleration sensor and for determining a direction to which said housing has moved and a distance that said housing has moved, respectively, in accordance with an output of said second acceleration sensor when said housing is in the moving state; and
a control unit for determining a direction and a distance that said focus lens is to be moved in accordance with the direction and the distance that said projection structure body has moved, the direction and the distance that said housing has moved, or each those direction and distance of said projection structure body and said housing, which are supplied from said determination unit and for controlling movement of said focus lens by said focus adjustment unit in accordance with the determined direction and the determined distance of said focus lens. - View Dependent Claims (8, 9)
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10. A focus adjustment method for a projector including a projection lens in which a focus lens is movable along an optical axis and an acceleration sensor for detecting acceleration of a housing in which said projection lens is arranged, comprising:
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determining whether said housing is in a stationary state or in a moving state in accordance with an output of said acceleration sensor;
respectively obtaining a direction to which said housing has moved and a distance that said housing has moved in accordance with an output of said acceleration sensor when said housing is in the moving state;
determining a direction and a distance that said focus lens is to be moved in accordance with the determined direction and the determined distance of said housing; and
moving said focus lens in accordance with the determined direction and the determined distance of said focus lens. - View Dependent Claims (11, 12)
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13. A focus adjustment method performed in a projector system including a projector having a projection lens in which a focus lens is movable along an optical axis and an acceleration sensor for detecting acceleration of a housing in which said projection lens is arranged, a projection structure body on which an image is projected by said projection lens and which is movable, and another acceleration sensor for detecting acceleration of said projection structure body, comprising:
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determining whether said housing is in a stationary state or in a moving state in accordance with an output of said acceleration sensor;
obtaining a direction to which said housing has moved and a distance that said housing has moved in accordance with an output of said acceleration sensor when said housing is in the moving state;
determining a first direction and a first distance that said focus lens is to be moved in accordance with the determined direction and the determined distance of said housing;
moving said focus lens in accordance with the first direction and the first distance of said focus lens, which has been determined;
determining whether said projection structure body is in a stationary state or in a moving state in accordance with an output of said another acceleration sensor;
obtaining a direction to which said projection structure body has moved and a distance that said projection structure body has moved in accordance with an output of said another acceleration sensor when said projection structure body is in the moving state;
determining a second direction and a second distance that said focus lens is to be moved in accordance with the determined direction and the determined distance of said projection structure body; and
moving said focus lens in accordance with the second direction and the second distance of said focus lens, which has been determined. - View Dependent Claims (14, 15)
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Specification