Image projection device

Abstract

The present invention provides an image projection device that can improve image visibility by suppressing fluctuations in the image formation position caused by vehicle pitching. [Solution] An image projection device (100) for projecting a projected image onto a display unit for displaying a virtual image, comprising: an image illumination unit (10) for irradiating a first image light and a second image light; an optical path difference unit (20) for creating an optical path difference between the first image light and the second image light; a projection optical unit (30) for projecting the first image light and the second image light onto the display unit; and an inclination information acquisition unit (40) for acquiring vehicle inclination information, and an optical modification unit (50) for driving the optical path difference unit (20) based on the inclination information and changing the incidence angle of the first image light onto the projection optical unit (30).

Claims

1. An image projection device that projects a projected image onto a display unit for displaying a virtual image, An image illumination unit that emits a first image light and a second image light, An optical path difference unit that generates an optical path difference between the first image light and the second image light, A projection optical unit that projects the first image light and the second image light onto the display unit, It includes a tilt information acquisition unit that acquires tilt information of the vehicle, An image projection apparatus characterized by having an optical modification unit that drives the optical path difference unit based on the tilt information and changes the angle of incidence of the first image light to the projection optical unit.

2. An image projection device according to claim 1, The optical path difference section comprises a first planar mirror and a second planar mirror. An image projection apparatus characterized in that the first image light is reflected by the first planar mirror and the second planar mirror and reaches the projection optical unit.

3. An image projection device according to claim 2, An image projection apparatus characterized in that the second image light passes between the first planar mirror and the second planar mirror and reaches the projection optical unit.

4. An image projection device according to claim 2, The optical modification unit is characterized by rotating the first planar mirror and / or the second planar mirror.

5. An image projection device according to claim 1, The optical modification unit is characterized by reducing fluctuations in the image formation position of the virtual image due to the tilt information.

6. An image projection device according to claim 1, The image illumination unit displays a first image in the first region of the image display unit and illuminates it with the first image light, and displays a second image in the second region of the image display unit and illuminates it with the second image light. An image projection apparatus characterized by comprising an image position correction unit that corrects the display position of the first image and / or the second image in the image display unit based on the tilt information.

7. An image projection device according to any one of claims 1 to 6, The image projection device is characterized in that the imaging position of the virtual image is further from the viewpoint position for the first image light than for the second image light.

Images