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Traffic light is shaped as hour-glass, giving waiting traffic participants optical indication of duration of specific phase or waiting time
Traffic light is shaped as hour-glass, giving waiting traffic participants optical indication of duration of specific phase or waiting time
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机译：交通信号灯的形状为沙漏形，可让等待的交通参与者直观地看到特定阶段或等待时间的持续时间
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摘要
The traffic light is shaped as an hour-glass (5), giving waiting traffic participants an optical indication of the duration of a specific phase or waiting time. The light-emitting uppermost compartment (3) in a specific time gradually fades, whilst the lowermost compartment in corresponding manner gradually illuminates. On a supporting background in the uppermost compartment, a considerable number of light-emitting diodes are fitted systematically in horizontal rows in an inverted triangular row arrangement corresponding to the uppermost compartment of the hour-glass. Likewise in the lowermost compartment a considerable number of light-emitting diodes are fitted systematically in horizontal rows in a trapezium-shaped row arrangement. At the beginning of the waiting period in the uppermost compartment all the diodes illuminate. At the elapse of the waiting period, the optical impression of an hour-glass running from top to bottom is provided.
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