Patent ID: 6760162
Filing Date: 2004-07-06
Classification: G03B,H04N

Abstract:
A projection display system comprising:a liquid crystal panel displaying an image; a first lens group having a positive refractive power, formed by combination of two or more lenses, and correcting aberration of incident light from the liquid crystal panel; a total reflection mirror reflecting the incident light from the first lens group in a predetermined direction; a second lens group having a negative refractive power, formed by combination of two or more lenses, and correcting aberration of the incident light from the total reflection mirror; and a distance between the liquid crystal panel and the first and second lens groups is based on a focal distance and is determined to satisfy the following conditions: 2.01/f1<2.8; 0.62/f1|<1.0; and 4.02<5.0, wherein bf1 represents a focal distance between the liquid crystal panel and a lens included in the first lens group nearest to the liquid crystal panel, fl represents a focal length of the whole projection lens system including the total reflection mirror, the first lens group, and the second lens group, f1 represents a focal distance of the first lens group, f2 represents a focal distance of the second lens group, and d represents a distance between the first and second lens groups.