Patent ID: 6508556
Filing Date: 2003-01-21
Classification: F21V,G03B,H04N

Abstract:
A projection display apparatus for projecting an enlarged image onto a screen, comprising:an optical unit having a projection lens for projecting an enlarged image; a lamp case fixed to said optical unit; a lamp house in which a lamp holder to which a lamp for distributing light to said optical unit is fixed is movably disposed and which is detachably attached to said lamp case; a lamp position regulating member which includes at least three projecting members, each of which come into contact with a reference face of said optical unit and regulates a position of said lamp holder when said lamp house is attached to said lamp case, thereby positioning a center of said lamp onto an optical axis of said optical unit; and a lamp posture regulating member that regulates a posture of said lamp holder when said lamp house is attached to said lamp case, thereby making an optical axis of said lamp and said optical axis of said optical unit parallel to each other.