Patent ID: 9360679
Filing Date: 2016-06-07
CPC Classification: G02B,G03B,H04N

Claim Text:
1. A projection type image display device comprising: a light source that emits coherent light; an optical scanning section that scans the coherent light emitted from the light source; an optical modulation element having an image formation area in which an image is formed; a beam forming means provided between the light source and the optical scanning section; an optical path conversion system configured to allow the coherent light scanned by the optical scanning section to illuminate the image formation area sequentially in an overlapping manner; and a projection optical system that projects the image of the optical modulation element on a screen, wherein the beam forming means uniforms an intensity distribution of the coherent light emitted from the light source on a surface in the vicinity of the optical scanning section, the optical path conversion system is set such that the surface and optical modulation element surface are in a conjugate relationship, and an incident angle of the coherent light that enters respective points of the image formation area temporally changes.