| 摘要 |
PROBLEM TO BE SOLVED: To provide a projection device that can display images in responce to a motion of humans.SOLUTION: A projection device 10 comprises: a first light emitting element 20 that emits red light; a second light emitting element 21 that emits green light; a third light emitting element 22 that emits blue light; a fourth light emitting element 23 that emits a first infrared ray; an optical path control unit that controls optical paths of light from the first to fourth light emitting elements 20 to 23; a mirror device 40 that reflects the light from the optical path control unit toward a screen; a light reception unit 24 that receives a second infrared ray having the first infrared ray externally reflected; and a case 30 that stores the first to fourth light emitting elements 20 to 23, the optical path control unit, the mirror device 40, and the light reception unit 24.SELECTED DRAWING: Figure 2 |
