The present invention provides a projection type display apparatus. The projection
type display apparatus for enlarging and projecting an image onto a projected plane
includes a projection optical unit for projecting image light onto the projected
plane, an optical device for dividing light emitted from a light source into image
light that travels to the projection optical unit and unnecessary light that travels
outside the projection optical unit, a holding member for holding the projection
optical unit, and a light receiving member for receiving the unnecessary light,
wherein the light receiving member is provided as a member independent of the holding
member. Accordingly, a projection typo display apparatus can be realized that is
capable of suppressing or reducing a temperature rise in the holding member caused
by the incidence of unnecessary light and the deformation thereof caused by thermal
expansion and that is capable of preventing a deterioration in the image quality
of a displayed image.
