| 发明名称 | Projection screen and projection system using the same | ||
| 摘要 | A projection screen includes a reflector and a plurality of compound lenses. The compound lenses are arranged at the same side of the reflector in an array manner. Each of the compound lenses has a first lens portion and a second lens portion. The first lens portion is disposed between the second lens portion and the reflector. A surface of the first lens portion opposite to the reflector has a first radius of curvature, and a surface of the second lens portion opposite to the reflector has a second radius of curvature. The first radius of curvature has a length greater than the second radius of curvature. | ||
| 申请公布号 | US9280040(B2) | 申请公布日期 | 2016.03.08 |
| 申请号 | US201414483978 | 申请日期 | 2014.09.11 |
| 申请人 | DELTA ELECTRONICS, INC. | 发明人 | Wang Yu-Chang |
| 分类号 | G03B21/625;G03B21/602 | 主分类号 | G03B21/625 |
| 代理机构 | Hauptman Ham, LLP | 代理人 | Hauptman Ham, LLP |
| 主权项 | 1. A projection screen comprising: a reflector; and a plurality of compound lenses arranged at the same side of the reflector in an array manner, each of the compound lenses having a first lens portion and a second lens portion, the first lens portion being disposed between the second lens portion and the reflector, a surface of the first lens portion opposite to the reflector having a first radius of curvature, and a surface of the second lens portion opposite to the reflector having a second radius of curvature, the first radius of curvature having a length greater than the second radius of curvature; wherein the first lens portion is a convex lens portion, and a lens pupil is imaged by the compound lenses and enlarges to the viewing zone of the projection screen. | ||
| 地址 | TW | ||