Image projection apparatus, and control method of image projection apparatus

Abstract

An image projection apparatus includes a light source to emit light, an image generation unit including an image generation element to generate an image using the light emitted from the light source, an optical unit to guide the light emitted from the light source to the image generation unit, and to enlarge and project the image generated by the image generation unit, a drive unit to change any one of a position of the image generation element and a position of at least a part of the optical unit at specific timing, and a cooling device to cool one or more parts disposed in the image projection apparatus. An operation sound generated by the cooling device while the cooling device is being operated has a given frequency characteristic settable according to a drive frequency of the drive unit.

Description

technical field [0001] The present invention relates to an image projection device and a control method for the image projection device. Background technique [0002] Image projection devices (projectors) are generally based on image data sent by information processing devices such as personal computers, video playback devices such as DVD devices, and imaging devices such as digital cameras. Generate images for modulation components, image display components), and the generated images are projected onto screens and other projected surfaces through optical systems including multiple lenses. Image projection devices are widely used in various conferences, lectures, education sites, etc. For various fields such as lecture presentations and home theaters attended by a large number of people. [0003] The image projection device is equipped with a fan, which is a cooling device for cooling these components, because the light source (lamp), stabilizer, power supply unit, etc. ins...

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Problems solved by technology

[0007] However, when the image projection device shifts the pixels, it needs to control a part of the movement (called pixel shift control), so the operation sound will be generated during the movement control operation, which will increase the number of noise sources.

In this regard, although a noise reduction device such as a generator for noise reduction disclosed in Patent Document 1 can be additionally provided, this is not conducive to reducing the price of the image projection device and saving space.

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