Bidirectionally illuminating light source triggered by power-line pulse signals, a light string, and a control apparatus
View Patent ↗A bidirectionally illuminating light source triggered by power-line pulse signals includes a first light emitting module triggered by power-line pulse signals and a reverse light emitting module, which are connected in parallel between a first port and a second port of the power lines. The first light emitting module triggered by power-line pulse signals comprises an LED color light group and an LED driver. When the voltage level of the first port of the power lines is higher than that of the second port, the LED driver drives the LED color light group according to the power-line pulse signals loaded on the power lines; when the voltage level of the first port of the power lines is lower than that of the second port, the reverse light emitting module operates. A bidirectional emitting light string and control apparatus triggered by power-line pulses are also provided.
1 . A bidirectionally illuminating light source triggered by power-line pulse signals, the 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.
2 . The light source of claim 1 , wherein,
the LED driver comprises a reverse current blocking module; and
an operation module triggered by the power-line pulse signals.
3 . The light source of claim 1 , wherein the reverse light-emitting module comprises a plurality of LEDs.
4 . The light source of claim 1 , wherein,
the reverse light-emitting module is a second light-emitting module;
when the voltage level of the first port of the power lines is lower than the voltage level of the second port of the power lines, the second light-emitting module is driven by the power-line pulse signals loaded on the power lines, and drives an LED color light group of the second light-emitting module.
5 . The light source of claim 4 , wherein the LED color light group of the second light-emitting module is in a different color series from that of the LED color light group of the first light-emitting module.
6 . A bidirectional emitting light string triggered by power-line pulses, comprising a plurality of light sources according to claim 1 , wherein the plurality of light sources are connected to a first port of the light string and a second port of the light string;
the plurality of light sources are connected in parallel, in a series-parallel structure, or in a parallel-series structure.
7 . The light source of claim 1 , wherein the LED driver comprises a reverse current blocking module; and an operation module triggered by the power-line pulse signals;
wherein the reverse current blocking module and the operation module are integrated in a same integrated circuit.
8 . The light source of claim 7 , wherein an input of the reverse current blocking module is connected to the first port of the power lines, and an output of the reverse current blocking module is connected to the operation module; and wherein the operation module is configured to drive the LED color light group according to an operation result of the operation module.
9 . A bidirectionally illuminating light source triggered by power-line pulse signals, the 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 LED driver comprises a reverse current blocking module; and an operation module triggered by the power-line pulse signals;
an input of the reverse current blocking module is connected to the first port of the power lines, and an output of the reverse current blocking module is connected to the operation module; and wherein the operation module is configured to drive the LED color light group according to an operation result of the operation module;
wherein,
the reverse current blocking module is a unidirectional conducting module;
the reverse current blocking module is conducting when an input voltage of the reverse current blocking module is higher than an output voltage of the reverse current blocking module, and the reverse current blocking module is turned off when the input voltage of the reverse current blocking module is lower than the output voltage of the reverse current blocking module.
10 . The light source of claim 9 , wherein,
the unidirectional conducting module is a diode having an anode connected to the first port of the power lines and a cathode connected to the operation module;
alternatively, the unidirectional conducting module is an equivalent diode formed by an NPN transistor having a collector and a base connected to the first port of the power lines, and an emitter connected to the operation module;
alternatively, the unidirectional conducting module is an equivalent diode formed by a PNP transistor having a collector and a base connected to the operation module, and an emitter connected to the first port of the power lines.
11 . The light source of claim 10 , wherein the reverse current blocking module and the operation module are integrated in a same integrated circuit.
12 . The light source of claim 11 , wherein a low level of the power-line pulse signals is equal to the voltage level of the second port of the power lines.
13 . The light source of claim 11 , wherein a low level of the power-line pulse signals is a third voltage level that is higher than the voltage level of the second port and lower than the voltage level of the first port.
14 . The light source of claim 11 , wherein the operation module is configured to perform computation triggered by the pulse signals, and drive the LED color light group according to computation results.
15 . The light source of claim 14 , wherein the operation module is configured to perform arithmetic operations, logical operations, or a combination of both.
16 . The light source of claim 14 , wherein the operation module is configured to perform pulse counting computation triggered by the pulse signals.
17 . The light source of claim 11 , wherein the operation module is configured to perform encoding and decoding computation triggered by the pulse signals, with a pulse width of high or low levels corresponding to encoded information.
18 . The light source of claim 17 , wherein different lengths of high levels, or different lengths of low levels, or combinations of different lengths of high and low levels, represent different logical encoding information.
19 . The light source of claim 11 , wherein the operation module is configured to perform modulation and demodulation computation based on a current or voltage frequency triggered by the pulse signals, and drive the LED color light group according to results from the modulation and demodulation computation.
20 . A bidirectional emitting control apparatus triggered by power-line pulses, comprising:
a bidirectional emitting light string comprising a plurality of light sources each 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 that 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 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.
21 . The bidirectional emitting control apparatus of claim 20 , wherein when the second controllable switch and third controllable switch are turned off, the control circuit controls the first controllable switch between on and off to control the first light emitting modules.
22 . The bidirectional emitting control apparatus of claim 20 , wherein when the first controllable switch and the fourth controllable switch are turned off, and the second controllable switch and the third controllable switch are turned on, the reverse light emitting modules operate.
23 . The bidirectional emitting control apparatus of claim 20 , wherein
the fourth controllable switch comprises a first N-type controllable switch, a second N-type controllable switch, and a current-limiting resistor;
the first N-type controllable switch comprises a control port, an input port, and an output port; the control port of the first N-type controllable switch is electrically connected to the control circuit; the input port of the first N-type controllable switch serves as the input port of the fourth controllable switch, and the output port of the N-type controllable switch is connected to ground;
the second N-type controllable switch comprises a control port, an input port, and an output port; the control port of the second N-type controllable switch is electrically connected to the control circuit, and the output port of the second N-type controllable switch is connected to ground;
one port of the current-limiting resistor is connected to the input port of the first N-type controllable switch, and the other port of the current-limiting resistor is connected to the input port of the second N-type controllable switch.
24 . The bidirectional emitting control apparatus of claim 20 , wherein when the second and third controllable switches are turned off, the control circuit controls the fourth controllable switch between on and off to control the first light emitting modules.