Laser projector

Abstract

The invention provides a laser projector capable of more reliably correcting the projection image. The laser projector (100) adjusts the left-right swing width of an electromagnetic drive type scan mirror (4) from the first swing width to the second swing width in a projection interval (a) for forming the image on a projection screen (S), thus the projection image on the projection screen (S) is corrected into a rectangle. Especially after moving to a later-state interval (b2) before the projection interval (a) for projecting the image on the projection screen (S), the left-right swing width of the electromagnetic drive type scan mirror (4) is kept be the first swing width corresponding with the width at the initial end of the projection interval (a), the left-right swing width of the electromagnetic drive type scan mirror (4) is easily adjusted from the first swing width to the second swing width to project the corrected image, thus image is more reliably corrected and projected.

Description

technical field [0001] The present invention relates to a laser projector that scans a projection surface with light from a laser light source to display images. Background technique [0002] As a laser projector using laser light as a light source, for example, a technique is known in which laser light from a laser light source is reflected by a resonator mirror in biaxial directions to irradiate a projection screen to display an image. [0003] For the laser light irradiated from the laser projector to the projection screen, scanning is performed while changing the irradiation angle by using a mirror, so trapezoidal deformation may occur: the longer the distance from the projector, the more difficult the image projected on the projection screen will be. become bigger. [0004] As a technique for correcting such trapezoidal deformation, a technique of correcting an image into a rectangle by performing image processing on a projector is generally used. [0005] In addition...

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Problems solved by technology

[0008] However, in the case of using the above-mentioned prior art, there is a problem that information loss may occur by optical image processing, which may degrade the image quality of the displayed image.

[0009] In addition, in the case of using the above-mentioned Patent Document 1, for example, the irradiation angle of the laser beam irradiated to the projection screen is small, and the reflected light reflected by the laser beam on the projection screen does not return to the projector side. The light receiving part cannot detect reflected light, and if the distance from the projector to the projection screen cannot be measured (measured), image correction processing may not be possible

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