System for controlling floor-type pedestrian signals
AssigneeAmosense Co., Ltd.
InventorGyuweon Shin
Life of this patent
Estimating the term…
Abstract
The present invention provides a plurality of floor-type pedestrian signals, in which a control signal and voltage control power are applied, the voltage control power is converted into constant current power in each floor-type pedestrian signal, and the constant current power is applied to an LED array according to the control signal. Through this, the present invention prevents the brightness of the floor-type pedestrian signal from lowering as the distance from a controller increases, and maintains a constant lighting time of the plurality of floor-type pedestrian signals, so that even if the width of a crosswalk increases, the visibility of the floor-type pedestrian signal is kept constant.
Claims9
A system for controlling a floor-type pedestrian signal, comprising
- a plurality of floor-type pedestrian signals including a light emitting diode (LED) array including LED devices of a first color and a second color and built-in in the ground between a road and a sidewalk,
- wherein the floor-type pedestrian signal includes:
- an input terminal connected to one of a controller and a previous floor-type pedestrian signal and configured to receive control signals and voltage control power;
- an output terminal connected to a next floor-type pedestrian signal and configured to output the control signals and the voltage control power to the next floor-type pedestrian signal;
- a constant current conversion module configured to convert the voltage control power input to the input terminal into constant current power and output the constant current power;
- a communication module configured to receive and output the control signals input to the input terminal and transmit the control signals to the output terminal;
- a control module configured to output a switching signal based on the control signals output from the communication module;
- and
- a switching module configured to apply the constant current power to the LED array and perform switching so that the constant current power is applied to the LED device corresponding to one of the first color and the second color based on the switching signal, and
- wherein the input terminal and the output terminal include signal lines through which the control signals are transmitted, and the signal line of the input terminal and the signal line of the output terminal are connected to the communication module.
Dependencies are inferred from the claim text.