发明名称 |
Light source device of liquid crystal projector |
摘要 |
A liquid crystal projector having a light source device which comprises a first reflective mirror surrounding a light source; a second reflective mirror which is disposed before the first mirror in the light emission direction and has a convergent shape with respect to the light source; a lamp house surrounding the light source, the first and second mirrors, and having an opening for cooling the light source positioned behind the first mirror; a first lamp shade disposed behind the light source and the first mirror, and having an area of an appropriate transverse cross section of a phantom cone or pyramid which is defined by a series of phantom linear lines connecting the light source and the contour of the opening for cooling the light source; and a second lamp shade disposed outside a curved wall of the first mirror and before the light source. <IMAGE> |
申请公布号 |
EP0846973(A2) |
申请公布日期 |
1998.06.10 |
申请号 |
EP19970121254 |
申请日期 |
1997.12.03 |
申请人 |
HITACHI, LTD.;HITACHI VIDEO & INFORMATION SYSTEM, INC. |
发明人 |
INAGE, HISAO;IKEDA, MUNENORI |
分类号 |
G02F1/1335;F21V7/09;F21V29/02;G02B27/00;G02F1/13357;G03B21/14;G09F9/00 |
主分类号 |
G02F1/1335 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|