Image display apparatus
OwnerShinichi Aritainventor
Life of this patent
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Abstract
To provide an image display apparatus in which provision of a mechanical mechanism is not required for reducing an effect of a speckle noise that is generated when a coherent light is used as a light source and a noise can be suppressed. An image display apparatus (1) changes phase of a light emitted from a light source device (a laser light source device (10) including laser light sources (10a to 10c) for each of R, G, and B colors is shown as a sample) at high speed by a phase change portion including an electro-optical crystal (phase change portions (12a to 12c) corresponding to each laser are shown as a sample). Therefore, because an interference pattern on a screen (16) changes at high speed and it is averaged by the human eye, the speckle noise can be reduced.
Claims14
1-13. (canceled)
An image display apparatus comprising:
- a light source device that emits a coherent light;
- an image forming means that forms an image on a screen;
- and
- a phase change portion disposed on a path of the light from its emission from the light source device until its arrival at the image forming means, wherein
- the phase change portion comprises an electro-optical crystal, the phase change portion driving to control a voltage applied to the electro-optical crystal so as to change phase of the light to be projected onto the screen, the phase change portion changing the phase of the light to be projected onto the screen depending on the wavelength of the light emitted from the light source device.
Dependencies are inferred from the claim text.