| 摘要 |
PURPOSE:To change the display position and size of a display pattern and call a driver's attention for safety driving by changing the regenerated light between multiple emitters when alarming for excess speed or the like. CONSTITUTION:When the vehicle speed is less than a preset value, the first electric lamp 17a is turned on by a controller 21 via a transfer switch 22 based on the output of a sensor 20. In this case, the regenerated light from the first electric lamp 17a is illuminated to a hologram plate 10 from an end face 19a via a fiber 18a, and a display pattern and a pointer recorded on the hologram plate 10 and a pointer plate 15 are regenerated as a standard image. On the other hand, when the vehicle speed is the preset value or more, the transfer switch 22 is alternately transferred to turn the electric lamp 17a or 17b. Then, the regenerated light is transferred to the end face 19b of an optical fiber 18b, and the display pattern and pointer are displayed at the rear position B as an expanded image, thus calling a driver's attention.
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