Abstract: A more favorable air floating video display apparatus is provided. According to the present invention, it is possible to contribute to “Goal 3: Ensure healthy lives and promote well-being for all at all ages”, “Goal 9: Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation”, and “Goal 11: Make cities and human settlements inclusive, safe, resilient and sustainable” in the Sustainable Development Goals (SDGs). The air floating video display apparatus includes a video display apparatus, a polarization separator, a retroreflection module having a ?/4 plate and a retroreflector, and a housing configured to hold them. In a relationship between a first angle that the video display apparatus forms with respect to the polarization separator and a second angle that the retroreflection module forms with respect to the polarization separator, the second angle is different from the from angle.

Abstract: A video is preferably displayed on outside of a space. The present invention contributes to “the third goal: Good Health and Well-being (for all people)”, “the ninth goal: Industry, Innovation and Infrastructure” and “the eleventh goal: Sustainable Cities and Communities” of the sustainable development goals. An air floating video display system includes: a display panel configured to display a video; a light source apparatus for the display panel; a retroreflector configured to reflect video light emitted from the display panel and to cause the reflected light to aerially display an air floating video of a real image; and a video light control sheet configured to convert an optical path of the video light. The video light control sheet is arranged between the retroreflector and the display panel to adjust an emission direction and a divergence angle of a video light flux emitted from the display panel.

Abstract: A projector having an image display element for modulating light on the basis of an image signal and a projection lens for projecting light emitted from the image display element on a screen, includes: a lamp which has a light emitting source for emitting light; a reflector which reflects light emitted from the light emitting source; a cover glass which covers an emission surface of light from the reflector; a cooling fan disposed outside the reflector; and an air direction changing unit which changes a direction of cooling air caused by the cooling fan. The air direction changing unit is disposed within a space surrounded by the reflector and the cover glass, and outside an emitted light path of light reflected by the reflector. Cooling air within the space is exhausted outside the projector through the cooling fan.

Abstract: A projector having an image display element for modulating light on the basis of an image signal and a projection lens for projecting light emitted from the image display element on a screen, includes: a lamp which has a light emitting source for emitting light; a reflector which reflects light emitted from the light emitting source; a cover glass which covers an emission surface of light from the reflector; a cooling fan disposed outside the reflector; and an air direction changing unit which changes a direction of cooling air caused by the cooling fan. The air direction changing unit is disposed within a space surrounded by the reflector and the cover glass, and outside an emitted light path of light reflected by the reflector. Cooling air within the space is exhausted outside the projector through the cooling fan.