| 发明名称 | Light source unit and projection display device with the same | ||
| 摘要 | A light source unit includes LED 1 with an emission surface and polarizer 2 that is positioned opposite the emission surface of LED 1 and in which the direction of a transmission axis varies depending on a position in the plane of polarizer 2. Polarizer 2 includes a recessed and protruding structure which transmits, from among light that travels from LED 1 side into polarizer 2, a portion of the light whose polarization direction is parallel to the transmission axis, while reflecting and diffracting a portion of the light whose polarization direction is orthogonal to the transmission axis. The recessed and protruding structure includes diffraction grating 3. | ||
| 申请公布号 | US9103527(B2) | 申请公布日期 | 2015.08.11 |
| 申请号 | US201113823838 | 申请日期 | 2011.11.15 |
| 申请人 | NEC CORPORATION | 发明人 | Tomiyama Mizuho |
| 分类号 | G03B21/14;F21V9/14;G02B5/30;H01L33/58;G02F1/1335 | 主分类号 | G03B21/14 |
| 代理机构 | Sughrue Mion, PLLC | 代理人 | Sughrue Mion, PLLC |
| 主权项 | 1. A light source unit comprising: a light emitting element with an emission surface; and a polarizer that is provided opposite the emission surface of said light emitting element and in which a direction of a transmission axis varies depending on a position in a plane of said polarizer, wherein said polarizer includes a recessed and protruding structure which transmits, from among light that exits from the emission surface and that travels from said light emitting element into said polarizer, a portion of the light whose polarization direction is parallel to the transmission axis, while reflecting and diffracting a portion of the light whose polarization direction is orthogonal to the transmission axis. | ||
| 地址 | Tokyo JP | ||