| 发明名称 | Optical unit | ||
| 摘要 | An optical unit includes a light source that emits light to be projected onto a screen, one or a plurality of optical elements that controls a spread of a beam of light from the light source to the screen, a combining element that combines the light emitted from the light source, and a scanning element. The light source outputs an optical beam that will generate an elliptically shaped beam spot on the screen, the beam spot having a major axis substantially perpendicular to a scanning direction, and the light source is driven with pulse width modulation (PWM) so that one driven pulse corresponds to one beam spot on the screen. | ||
| 申请公布号 | US8827459(B2) | 申请公布日期 | 2014.09.09 |
| 申请号 | US201314013493 | 申请日期 | 2013.08.29 |
| 申请人 | Hitachi Consumer Electronics Co., Ltd. | 发明人 | Nagayoshi Mayumi;Ouchi Satoshi;Kosaka Tadayoshi;Kobori Tomoki;Seo Yoshiho |
| 分类号 | G03B21/00 | 主分类号 | G03B21/00 |
| 代理机构 | Antonelli, Terry, Stout & Kraus, LLP. | 代理人 | Antonelli, Terry, Stout & Kraus, LLP. |
| 主权项 | 1. An optical unit comprising: a light source that emits light to be projected onto a screen; one or a plurality of optical elements that controls a spread of a beam of light from the light source to the screen; a combining element that combines the light emitted from the light source; and a scanning element; wherein the light source outputs an optical beam that will generate an elliptically shaped beam spot on the screen, the beam spot having a major axis substantially perpendicular to a scanning direction; and wherein the light source is driven with pulse width modulation (PWM) so that one driven pulse corresponds to one beam spot on the screen. | ||
| 地址 | Tokyo JP | ||