| 发明名称 | Projection-type display apparatus | ||
| 摘要 | A projection-type display apparatus includes a light source unit, a first optical system that rays from the light source unit enter, a second optical system that rays from the first optical system enter, an image display device that rays from the second optical system enter, and a projection lens that magnifies and projects an optical image formed by rays that have been optically modulated by the image display device onto a screen. The second optical system is configured to pass again the rays that have been output from the image display device, and to make the rays enter the projection lens. The first optical system includes at least one reflective optical element, and the second optical element consists essentially of two positive lenses. | ||
| 申请公布号 | US9625801(B2) | 申请公布日期 | 2017.04.18 |
| 申请号 | US201514660957 | 申请日期 | 2015.03.18 |
| 申请人 | FUJIFILM Corporation | 发明人 | Baba Tomoyuki |
| 分类号 | G03B21/20;G03B21/00 | 主分类号 | G03B21/20 |
| 代理机构 | Young & Thompson | 代理人 | Young & Thompson |
| 主权项 | 1. A projection display apparatus comprising: a light source unit; a first optical system that rays from the light source unit enter; a second optical system that rays from the first optical system enter; an image display device that rays from the second optical system enter; and a projection lens that magnifies and projects an optical image formed by rays that have been optically modulated by the image display device onto a screen, wherein the second optical system is configured to pass again the rays that have been output from the image display device, and to make the rays enter the projection lens, wherein the first optical system includes at least one reflective optical element, wherein the second optical element consists essentially of two positive lenses, and wherein a surface closest to the projection lens in the second optical system is concave. | ||
| 地址 | Tokyo JP | ||