Patent ID: 8002419

Claim:
A projection-type image display device comprising: an image light generator configured to generate image light; a projection optics configured to project the image light onto a screen; and a protective cover configured to protect the projection optics, and provided on an optical path of the image light reflected by a reflection mirror, wherein the image light generator includes an optical modulator configured to modulate light based on an image signal, the projection optics includes, a projection lens configured to project the image light outputted from the image light generator, and the reflection mirror having curved mirror surface configured to reflect the image light outputted from the projection lens toward the screen, an effective display region of the optical modulator is provided opposite side of the reflection mirror relative to an optical axis of the projection lens, the protective cover has a transmissive region transmitting the image light reflected by the reflection mirror, the reflection mirror is a concave mirror, and the transmissive region is disposed in the vicinity of a position where the image light is condensed by the reflection mirror.