Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Patent
1991-04-02
1992-08-18
Henry, John W.
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
359633, G02B 2714, G02B 1706
Patent
active
051404656
ABSTRACT:
In one embodiment of the present invention, the automotive display apparatus has two concave mirrors arranged below the windshield in such a way that light from the display of an indicator which shows driving condition information such as car speed is reflected by one of the concave mirrors toward the other concave mirror, which then reflects the light toward the windshield that further directs it toward the driver's seat. A drive can thus see a remotely formed virtual display image within a viewing field of the windshield. The first concave mirror, which directly receives light from the indicator and reflects it toward the second concave mirror, is mounted on a plane mirror in such a manner that it can be moved into or out of a light path that extends from the indicator to the second concave mirror. When the first concave mirror is in the light path, the display image is magnified and hence the virtual display image is formed at a remote position from the driver. When the first concave mirror is moved out of the light path, the light is simply reflected by the plane mirror and not magnified so that the virtual display image is formed at a position closer to the driver than the first position. The virtual image position is changed according to the car speed. Other embodiments of the invention include mounting the automotive display apparatus on the ceiling of the vehicle.
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Itami Kazuhrio
Suzuki Masao
Yasui Katsu
Henry John W.
Yazaki -Corporation
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