Road marking unit and road marking system capable of switching from reflective state to light absorbing state
First Claim
1. A road marking unit comprising a housing with a light-transmitting window, and an electro-optical switch accommodated in the housing, which switch in an activated state reflects light entering from the window back towards the window, and in a deactivated state absorbs light entering from the window.
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Accused Products
Abstract
A road marking unit (1) according to the invention comprises a house (10) with a light transmissive window (20). In the house (10) is arranged an electro-optic switch (30). In an activated state of the road marking unit (1) the electro-optic switch (30) achieves that light is reflected from the window (20) back to the window (20). In a de-activated state of the road marking unit (1) the electro-optic switch (30) achieves that light from the window (20) is absorbed. The road marking unit (1) of the invention has the advantage that it can also in bright environmental light it can be switched between visible and invisible.
17 Citations
7 Claims
- 1. A road marking unit comprising a housing with a light-transmitting window, and an electro-optical switch accommodated in the housing, which switch in an activated state reflects light entering from the window back towards the window, and in a deactivated state absorbs light entering from the window.
Specification