A bidirectionally illuminating light source triggered by power-line pulse signals, a light string, and a control apparatus

A bidirectional emitting control apparatus comprising a plurality of light sources,

• each light source comprising:
• a first light emitting module triggered by the power-line pulse signals loaded on power lines;
• and
• a reverse light emitting module connected in parallel with the first light emitting module, between a first port and a second port of the power lines;
• wherein the first light emitting module comprises an LED color light group, and an LED driver configured to drive the LED color light group according to the power-line pulse signals;
• when a voltage level of the first port of the power lines is higher than a voltage level of the second port, the LED driver drives the LED color light group according to the power-line pulse signals;
• when the voltage level of the first port of the power lines is lower than the voltage level of the second port, the reverse light emitting module operates;
• wherein the plurality of light sources are connected to a first port of the bidirectional emitting light string and a second port of the bidirectional emitting light string;
• and
• wherein the plurality of light sources are connected in parallel, in a series-parallel structure, or in a parallel-series structure;
• a first controllable switch, a second controllable switch, a third controllable switch, and a fourth controllable switch;
• wherein
• the first controllable switch, the second controllable switch, the third controllable switch, and the fourth controllable switch are controlled by a control circuit;
• an input port of the first controllable switch is connected to a DC power supply, an output port of the first controllable switch is connected to the first port of the bidirectional emitting light string, and a control port of the first controllable switch is connected to the control circuit;
• an output port of the second controllable switch is connected to the first port of the bidirectional emitting light string, an input port of the second controllable switch is connected to ground, and a control port of the second controllable switch is connected to the control circuit;
• an input port of the third controllable switch is connected to the DC power supply, an output port of the third controllable switch is connected to the second port of the bidirectional emitting light string triggered by power-line pulses, and the a control port of the third controllable switch is connected to the control circuit;
• an output port of the fourth controllable switch is connected to the second port of the bidirectional emitting light string triggered by power-line pulses, an input port of the fourth controllable switch is connected to ground, and a control port of the fourth controllable switch is connected to the control circuit.