LIGHT BLOCKING MEMBER AND PROJECTION VIDEO DISPLAY DEVICE
A light blocking member according to the present disclosure is for a projection video display device provided with an optical system that projects video light and a projection lens on which the video light is incident, the light blocking member being disposed between the optical system and the projection lens, the light blocking member including: a first light blocking portion that absorbs and converts into heat a part of unnecessary light unnecessary for the projection lens in the video light; and a reflector that reflects, as reflected light, light that is a part of the unnecessary light and that is not absorbed by the first light blocking portion.
1 . A projection video display device comprising:
an optical system that projects video light;
a projection lens on which the video light is incident;
a light blocking member that absorbs and converts into heat a part of unnecessary light unnecessary for the projection lens in the video light; and
a light absorber which absorbs a light reflected by the light blocking member.
2 . The projection video display device according to claim 1 , wherein the light blocking member is disposed to be inclined at a predetermined inclination angle with respect to the light blocking member.
3 . The projection video display device according to claim 1 , wherein the light blocking member has a curved surface having a predetermined curvature.
4 . The light blocking member according to claim 1 , comprising a heat dissipator that dissipates heat of the light absorber to outside air.
5 . The light blocking member according to claim 1 , wherein the light blocking member is disposed to a position which a light from the optical system enters.
6 . The projection video display device according to claim 1 , wherein the projection lens and the light blocking member are made of a same material.
7 . The projection video display device according to claim 1 , wherein at least two of the light blocking member, the heat dissipator, and the projection lens are made of a same material.