Patent ID: 9693026
Date: 2017-06-27
CPC Classifications: F21V,G02B,G03B,H04N

Claim:
1. A projection type display apparatus comprising: a light source; a liquid crystal panel which includes a liquid crystal layer between a first substrate and a second substrate, and modulates light which is output from the light source; a projection optical system which projects the modulated light which is output from the liquid crystal panel; a first cutoff filter which reflects ultraviolet range light and is arranged between the light source and the liquid crystal panel; and a second cutoff filter which reflects the ultraviolet range light, is arranged between the light source and the first cutoff filter, and has a cut on wavelength longer than that of the first cutoff filter, wherein transmissivity of the first cutoff filter is equal to or more than 90% when light with a wavelength of which transmissivity of the second cutoff filter is 10% is radiated to the first cutoff filter.