VEHICLE, HEAD-UP DISPLAYING SYSTEM AND PROJECTOR THEREFOR
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United States of America Patent
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app pub date -
Dec 25, 2015
filing date -
Dec 25, 2014
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Abstract
A projector for HUD includes a displaying component (1) configured to project an image, and a three-mirror optical device (10) configured to reflect the image onto a front windshield (5) which reflects the image to a driver's eyes. The three-mirror optical device (10) comprises a zoom lens assembly (2) having a zoom lens (21) for zooming in/out the image projected by the displaying component (1), and an image quality compensation lens assembly (3) having an image quality compensation lens (31) for compensating for an image quality distortion caused during a change of the focus of the zoom lens(21), and a front windshield compensation lens assembly (4), configured to compensate for a distortion caused by the front windshield (5). A first and a second focus adjusting component (22, 32) are configured to adjust the focus of the zoom lens (21) and the focus of quality compensation lens (31), respectively.
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