| 发明名称 | Projection type image display device | ||
| 摘要 | To effectively suppress speckle noise generated when coherent light is used as a light source in a projection type image display device using an LCOS Liquid Crystal On Silicon). A projection type image display device according to the present invention includes: a light source that emits coherent light; an optical scanning section that scans the coherent light emitted from the light source; an LCOS that has an image formation area in which an image is formed; a projection optical system that projects an image formed on the image formation area on a screen; and a hologram that has polarization selectivity and diffuses scanning light scanned by the optical scanning section so as to allow diffusion light emitted from respective points thereof to illuminate the image formation area in an overlapping manner. | ||
| 申请公布号 | US9013641(B2) | 申请公布日期 | 2015.04.21 |
| 申请号 | US201214113086 | 申请日期 | 2012.04.20 |
| 申请人 | Dai Nippon Printing Co., Ltd. | 发明人 | Kurashige Makio |
| 分类号 | G02F1/1335;H04N9/31;G02B27/48;G03B21/00;G03B21/20;G03H1/22 | 主分类号 | G02F1/1335 |
| 代理机构 | Kratz, Quintos & Hanson, LLP | 代理人 | Kratz, Quintos & Hanson, LLP |
| 主权项 | 1. A projection type image display device comprising: a light source that emits coherent light; an optical scanning section that scans the coherent light emitted from the light source; an LCOS that has an image formation area in which an image is formed; a projection optical system that projects an image formed on the image formation area on a screen; and a hologram that has polarization selectivity and diffuses scanning light scanned by the optical scanning section so as to allow diffusion light emitted from respective points thereof to illuminate the image formation area in an overlapping manner. | ||
| 地址 | Tokyo JP | ||