US Patent 7959304 Projector

A projector which is configured to project an image by means of a projection light onto a surface approximately parallel, or a surface approximately perpendicular, to an installation surface. According to aspects of the disclosure, the projector may include a first reflecting surface which reflects the projection light toward the approximately parallel surface; a second reflecting surface which reflects the projection light toward the approximately perpendicular surface; and a reflecting surface switching section which can switchably place the first reflecting surface and the second reflecting surface in an optical path of the projection light.