发明名称 |
Light source device and projection display apparatus |
摘要 |
A light source device has: a light source unit including solid-state light sources emitting blue-color light and a condensing lens; a dichroic mirror polarization separating color light into first and second polarization components; a fluorescence emission plate excited with the first polarization component, emitting fluorescence of green and red components to enter the dichroic mirror; a first retardation plate converting the second polarization component to a circularly polarized light; and a reflection plate reflecting a light passed through the first retardation plate to reenter the same. The color lights from the fluorescence emission plate and the first retardation plate are combined at the dichroic mirror. A second retardation plate converts the polarization direction of the light from the light source unit, so as to control the ratio of p-polarization and s-polarization components. Lights from solid-state light sources are condensed efficiently and a high spectrum-utilization factor is obtained. |
申请公布号 |
US8733940(B2) |
申请公布日期 |
2014.05.27 |
申请号 |
US201113312204 |
申请日期 |
2011.12.06 |
申请人 |
TANAKA TAKAAKI;KITANO HIROSHI;PANASONIC CORPORATION |
发明人 |
TANAKA TAKAAKI;KITANO HIROSHI |
分类号 |
G03B21/14 |
主分类号 |
G03B21/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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