发明名称 |
Variable light distribution type headlamp |
摘要 |
A variable light distribution type headlamp which provides an optimum irradiated beam pattern under all driving conditions. The headlamp includes a projector lamp, a fixed lens, and a movable lens disposed on the optical axis of said projector lamp forward of said projector lamp. The movable lens is a condensing lens, and the fixed lens being a cylindrical concave lens. The focal length and a range of movement of the movable lens are such that front focal points of the movable and fixed lenses coincide when both lenses are close to each other. A lens drive mechanism controls the position of the movable lens in both X and Y directions so as to respectively control the amount of beam diffusion and beam direction in accordance with the vehicle speed and steering direction.
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申请公布号 |
US5138540(A) |
申请公布日期 |
1992.08.11 |
申请号 |
US19910689427 |
申请日期 |
1991.04.23 |
申请人 |
KOITO MANUFACTURING CO., LTD. |
发明人 |
KOBAYASHI, SYOJI;HAYAKAWA, MICHIHIKO |
分类号 |
B60Q1/12;B60Q1/14;F21V14/06 |
主分类号 |
B60Q1/12 |
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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