Light-emitting diode driving system based on power line transmission signal

Abstract

The present invention discloses a light-emitting diode driving system based on power line transmission signal, which is applied to drive LED light string to emit light, and at least includes a switch unit, a control unit, a main power supply and a secondary power supply, wherein the switch unit includes a main input terminal, a secondary input terminal, an output terminal and a controlled terminal. When the control unit is in working state, the switch unit is turned on. When the control unit outputs a high-level signal to control the switch unit to be turned on, the main power supply outputs a main DC power supply to the switch unit, and when the control unit outputs a low-level signal to control the switch unit to be turned on, the secondary power supply outputs a secondary DC power supply to the switch unit; under the control of the control unit, the switch unit outputs a light-emitting driving signal composed of a main and secondary DC power supplies to the light-emitting diode module light string to maintain stable light emission. The driving ability of the light string light signal on the light string light effect can be improved, so that the light string light effect is more stable.

Description

Technical Field

[0001] The invention belongs to the technical field of LED lamp control, and in particular relates to a light emitting diode driving system based on power line transmission signals. Background Art

[0002] At present, there is a light-emitting diode driving system on the market that uses power lines to transmit lighting control signals for the lighting effect of LED light strings. This driving system can reduce signal lines, making complex light string networks appear simpler and easier to assemble.

[0003] For example, the Chinese invention patent with authorization announcement number CN105992424B discloses a technical solution called "light-emitting diode drive system", which uses Zener diodes, capacitors and PMOS switches as signal generating circuits to achieve step-by-step control of LED light strings. This technical solution reduces the number of signal cables to a certain extent, but the defects are also obvious.

[0004] For example, the Zener diode is a voltage-stabilizing diode, and the current it provides for the signal is also extremely low. When the signal voltage is sent to the LED light string, the switch unit is in the off state, and the LED light string is in a non-working state. This will cause the terminal light string display effect to be unstable, which means that the driving ability of the signal generating circuit is weak. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a light emitting diode driving system based on power lines to transmit light control signals, which can improve the driving ability of the light string light signal on the light string light effect, making the light string light effect more stable.

[0006] In order to solve the above technical problems, the technical solution of the present invention is:

[0007] A light-emitting diode driving system based on power line transmission signals drives a light-emitting diode module lamp string to emit light, comprising at least a switch unit, a control unit, a main power supply and a secondary power supply, wherein the switch unit comprises a main input terminal, a secondary input terminal, an output terminal and a controlled terminal; wherein the main input terminal is electrically connected to the main power supply, the secondary input terminal is electrically connected to the secondary power supply, the controlled terminal is electrically connected to the control unit, and the output terminal is electrically connected to the light-emitting diode;

[0008] When the control unit outputs a high-level signal to control the switch unit to be turned on, the main power supply outputs a main DC power supply to the switch unit; when the control unit outputs a low-level signal to control the switch unit to be turned on, the auxiliary power supply outputs an auxiliary DC power supply to the switch unit;

[0009] Under the control of the control unit, the switch unit outputs a light-emitting driving signal composed of the main and auxiliary DC power supplies to the light-emitting diode module light string to maintain stable light emission.

[0010] Furthermore, the switch unit is composed of a main switch and a sub-switch; the main switch includes a main input terminal, the output terminal and the controlled terminal, and the sub-switch includes the sub-input terminal, the output terminal and the controlled terminal. The main and sub-switches are turned on alternately so that the switch unit is always in a conducting state and the LED light string is always in a normal working state.

[0011] Furthermore, the relationship between the light-emitting driving signal and time changes in a square waveform.

[0012] Furthermore, the control unit includes a power conversion device and a single-chip microcomputer control device.

[0013] The present invention provides a light-emitting diode driving system based on power line transmission signals, which is used to drive the light-emitting diode of an LED to emit light. The main and auxiliary power supplies with two different voltage values ​​and a control unit cooperate to provide a square waveform light-emitting driving signal to the light-emitting diode of the LED to control the light-emitting of the LED lamp and achieve different light-emitting effects.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The switch unit is always in the on state, providing stable and uninterrupted power and signal for the LED light string.

[0016] Second, the uninterruptible power supply and signal provided by the switch unit keep the LED light string in working state at all times, thus avoiding the phenomenon of unstable light emission of the LED light string. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The switch unit of the embodiment of the present invention is a circuit structure block diagram of a PMOS tube;

[0018] Figure 2 The circuit structure block diagram of the switch unit of the embodiment of the present invention is an NMOS tube;

[0019] Figure 3 for Figure 1 The circuit structure block diagram of the switch unit;

[0020] Figure 4 for Figure 1 The circuit structure block diagram of the control unit;

[0021] Figure 5 is a waveform diagram of a light-emitting driving signal in an embodiment of the present invention;

[0022] In the figure: 1-diode drive system, 2-switch unit, 3-control unit, 4-main power supply, 5-auxiliary power supply, 6-light emitting diode module light string, 7-AC power supply device, 21-main switch, 22-auxiliary switch, 31-power conversion device, 32-single-chip microcomputer control device, 201-main input terminal, 202-auxiliary input terminal, 203-output terminal, 204-controlled terminal, 210-input terminal A, 211-output terminal A, 212-controlled terminal A, 220-input terminal B, 221-output terminal B, 222-controlled terminal B. DETAILED DESCRIPTION

[0023] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] Example:

[0025] Figure 1 and Figure 2 The circuit diagrams of the switch units 2 are respectively disclosed as PMOS tubes and NMOS tubes, and the corresponding switch units are used according to different connection modes. As shown in the figure, a light-emitting diode driving system based on power lines to transmit light control signals provided by the present invention is connected to an external AC power supply device 7 and a light-emitting diode module light string 6 as a load. The system includes a switch unit 2, a control unit 3, a main power supply 4 and a secondary power supply 5; the switch unit 2 includes a main input terminal 201, a secondary input terminal 202, an output terminal 203 and a controlled terminal 204; wherein the main input terminal 201 is electrically connected to the main power supply 4, the secondary input terminal 202 is electrically connected to the secondary power supply 5, the controlled terminal 204 is electrically connected to the control unit 3, and the output terminal 203 is electrically connected to the light-emitting diode module light string 6.

[0026] When the control unit 3 outputs a high-level signal to control the switch unit 2 to be turned on, the output end 203 outputs the power provided by the main power supply 4; when the control unit 3 outputs a low-level signal to control the switch unit 2 to be turned on, the output end 203 outputs the power provided by the auxiliary power supply 5; under the control of the high and low level signals of the control unit 3, a light-emitting driving signal consisting of the main power supply 4 and the auxiliary power supply 5 alternating with each other and having the ability to drive light-emitting diodes is generated, and finally outputted from the output end 203 to the light-emitting diode module light string 6.

[0027] like Figure 3As shown, the main power supply 4 and the auxiliary power supply 5 cooperate with the control unit 3 to output different DC power supply voltages to the switch unit. The switch unit 2 is divided into a main switch and an auxiliary switch, that is, a main switch for receiving a high-level signal and an auxiliary switch for receiving a low-level signal; wherein the main switch includes an input terminal A 210, an output terminal A 211, and a controlled terminal A 212, and the auxiliary switch includes an input terminal B 220, an output terminal B 221, and a controlled terminal B 222. The controlled terminal B 222 and the controlled terminal A 212 are both connected to the controlled terminal 204, the output terminal A 211 and the output terminal B 221 are commonly connected to the output terminal 203, and the input terminal A 210 and the input terminal B 220 are electrically connected to the main input terminal 201 and the auxiliary input terminal 202 in sequence, respectively, and the two switch element groups are alternately turned on, so that the switch unit is always in a conducting state, and the LED light string is always in a normal working state.

[0028] like Figure 4 As shown, the control unit 3 includes a power conversion device 31 and a single-chip microcomputer control device 32. The external AC power supply device 7 is converted into a DC voltage through the power conversion device 31 and output to the single-chip microcomputer, and then the single-chip microcomputer outputs a square waveform control signal to the switch unit, and the control signal is applied to the controlled end 204 of the switch unit.

[0029] like Figure 5 As shown, the light-emitting driving signal output in this embodiment shows that the high and low levels of the driving signal are provided by the main and auxiliary power supplies respectively, and the control signal is provided by the single-chip microcomputer.

[0030] For example, the LED module light string 6 includes ten LED modules, each of which consumes a 5V voltage drop at a high level and a 3V voltage drop at a low level. The AC power supply device 7 selects a 220V AC output, the main power supply 4 outputs a 50V voltage, and the auxiliary power supply 5 outputs a 30V voltage, ensuring that each LED lamp in the light string at the load end has sufficient voltage and emits light stably.

[0031] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A light emitting diode driving system based on power line transmission signals, driving a light emitting diode module lamp string to emit light, comprising at least a switch unit, a control unit, a main power supply and a secondary power supply, characterized in that: The switch unit comprises a main input terminal, a secondary input terminal, an output terminal and a controlled terminal; wherein the main input terminal is electrically connected to the main power supply, the secondary input terminal is electrically connected to the secondary power supply, the controlled terminal is electrically connected to the control unit, the output terminal is electrically connected to the light emitting diode, and the input terminals of the main power supply and the secondary power supply are both electrically connected to an external AC power supply device; When the control unit is in working state, the switch unit is turned on. When the control unit outputs a high-level signal to control the switch unit to be turned on, the main power supply outputs the main DC power supply to the switch unit. When the control unit outputs a low-level signal to control the switch unit to be turned on, the auxiliary power supply outputs the auxiliary DC power supply to the switch unit. Under the control of the control unit, the switch unit outputs a light-emitting driving signal composed of the main and auxiliary DC power supplies to the light-emitting diode module light string to control the light-emitting diode to emit light, so as to obtain different light-emitting effects. The light-emitting diode is always in working state. The switch unit is composed of a main switch and a sub-switch; the main switch includes the main input end, the output end and the controlled end, and the sub-switch includes the sub-input end, the output end and the controlled end. The main and sub-switches are turned on alternately, so that the switch unit is always in a conducting state, and the LED light string is also always in a normal working state; The relationship between the light-emitting driving signal and time changes in a square waveform; The voltage values ​​of the main power supply and the auxiliary power supply are different; The control unit includes a power conversion device and a single-chip microcomputer control device.

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