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US 2015/0029469 A1Published application
Image projection apparatus, control method, and computer-readable storage medium
AssigneeRicoh Company, Ltd.
InventorYoshio KUBO
Life of this patent
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AssigneeRicoh Company, Ltd.
InventorYoshio KUBO
Estimating the term…
An image projection apparatus includes a light source in which a light emitting material emits light through an electric discharge between electrodes; an image forming unit that modulates an intensity of the light emitted from the light source to form an image; a cooling fan that cools the light source; an input unit that receives an input of an instruction signal for turning off a power source of the image projection apparatus; a voltage detector that detects a voltage value of the light source in lighting; a voltage value determining unit that determines whether the voltage value detected by the voltage detector is less than a preset threshold value when the input unit receives the instruction signal; and a cooling fan controller that performs an after-cooling operation of driving the cooling fan to cool the light source when the voltage value is less than the threshold value.
An image projection apparatus comprising:
The image projection apparatus according to claim wherein the cooling fan controller increases the number of rotations of the cooling fan in the after-cooling operation, compared with the number of rotations of the cooling fan in the lighting of the light source.
The image projection apparatus according to claim further comprising a usage time detector that detects a usage time of the light source, wherein
The image projection apparatus according to claim further comprising an after-cooling operation time setting unit that sets a period of time during which the after-cooling operation is performed based on the voltage value detected by the voltage detector in starting to use the image projection apparatus and the voltage value detected by the voltage detector in turning off the light source, wherein
A control method performed in an image projection apparatus that includes a light source in which a light emitting material emits light through an electric discharge between electrodes;
A non-transitory computer-readable storage medium with an executable program stored thereon and executed by a computer of an image projection apparatus that includes a light source in which a light emitting material emits light through an electric discharge between electrodes, an image forming unit that modulates an intensity of the light emitted from the light source to form an image, and a cooling fan that cools the light source, wherein the program instructs the computer to perform:
Dependencies are inferred from the claim text.