Load reducing method for controlling and driving LED lamp string through power carrier

Abstract

A load reducing method for controlling and driving an LED lamp string through a power carrier comprises the steps that at least more than one LED lamp body is connected in series or in parallel to form a time-sharing color-mixing lamp string, at least more than one output channel of a driving chip of the lamp body is arranged, a controller signal of the time-sharing color-mixing lamp string is superposed on a power supply, the duration of power voltage change is used for coding, and the time-sharing color-mixing lamp string is obtained. And staggering the opening time of the output channel of the driving chip of the lamp body in one period, sequentially opening the output of each output channel of the driving chip of the lamp body, and closing other output channels at the same time. After the output of each output channel of the driving chips of the lamp string and the lamp body formed by the series connection structure is completely finished, if a period is not finished, an output compensation of a shared bypass is started, the driving current of the lamp body is maintained until the period is finished, and due to the fact that the opening and closing frequency of the output channels is high and cannot be distinguished by human eyes, the driving current can be effectively controlled. The peak current output by the three output channels at the same time, the power consumption and the pressure of wire voltage drop can be obviously reduced.

Description

Technical Field

[0001] The present invention relates to light string control, and in particular to a load reduction method for driving an LED light string by power carrier control. Background Art

[0002] Smart light-emitting diode (LED) color-mixing lamps, implemented using power carrier technology, are connected in series or parallel to form light strings, according to pre-designed patterns including characters, animations, and patterns. To ensure that the next-level lamp receives the same power as the previous one, the driver chip for each LED lamp must have power compensation. Existing three-primary-color RGB lamps lack load balancing. The three LED output channels of a three-primary-color RGB lamp output current simultaneously, resulting in high peak currents and high power consumption. Furthermore, the drive current in the wires is the sum of the output currents of the three LED output channels of the three-primary-color RGB lamp, resulting in a high voltage drop in the wires. When the number of lamps in a light string is large, the high voltage drop can lead to insufficient power supply to the subsequent lamps in the series string, causing malfunction. In addition, for a series-connected light string, if the front three-primary-color RGB lamp body is not lit, the back three-primary-color RGB lamp body needs to be lit, so the required current cannot flow through the front three-primary-color RGB lamp body. Currently, three bypasses are set to correspond to the three LED output channels of the three-primary-color RGB lamp body. When the front three-primary-color RGB lamp body is turned off, the corresponding three bypasses are turned on respectively. (For example, Figure 1 The three primary colors RGB lamp body behind it is supplied with current. Summary of the Invention

[0003] A technical problem to be solved by the present invention is to remedy the defects of the above-mentioned prior art and provide a method for reducing the load of an LED light string by controlling the driving of the LED light string by a power supply carrier.

[0004] Another technical problem to be solved by the present invention is to remedy the defects of the above-mentioned prior art and provide another method for reducing the load of an LED light string by controlling the driving of the LED light string by a power supply carrier.

[0005] The technical problem of the load reduction method of a power carrier controlled LED light string driven by the present invention is solved by the following technical solution.

[0006] This method for reducing the load of a power carrier controlled LED light string consists of at least one LED lamp body connected in series according to pre-designed colors including characters, animations, and patterns to form a time-sharing mixed-color light string. The driver chip of the LED lamp body has at least one output channel. The controller signal of the time-sharing mixed-color light string is superimposed on the power supply and encoded with the duration of the power supply voltage change.

[0007] The characteristics of this power carrier control method of reducing the load of the LED light string are:

[0008] Stagger the opening time of the output channels of the LED lamp driver chip within a cycle, sequentially opening the output of each output channel of the LED lamp driver chip, and simultaneously closing the other output channels of the LED lamp driver chip;

[0009] After the output of each output channel of the driver chip of the LED lamp body is completed, if a cycle has not yet ended, an output compensation of a common bypass is turned on to maintain the driving current of the LED lamp body until the end of a cycle.

[0010] The technical problem of another method for reducing the load of an LED light string controlled by a power supply carrier of the present invention is solved by the following technical solution.

[0011] This method for reducing the load of a power carrier controlled LED light string consists of at least one LED lamp body connected in parallel according to pre-designed colors including characters, animations, and patterns to form a time-sharing mixed-color light string. The driver chip of the LED lamp body has at least one output channel. The controller signal of the time-sharing mixed-color light string is superimposed on the power supply and encoded with the duration of the power supply voltage change.

[0012] The characteristics of this power carrier control method of reducing the load of the LED light string are:

[0013] Stagger the opening time of the output channels of the LED lamp driver chip within a cycle, sequentially opening the output of each output channel of the LED lamp driver chip, and simultaneously closing the other output channels of the LED lamp driver chip;

[0014] After the output of each output channel of the driver chip of the LED lamp body is completed, if a cycle has not yet ended, there is no need to set a common bypass for output compensation.

[0015] The beneficial effects of the present invention compared with the prior art are:

[0016] In the method of the present invention, only one output channel of the driver chip of the LED lamp body is turned on at the same time. The time-sharing mixed-color lamp string composed of a series architecture maintains the driving current of the LED lamp body until the end of a cycle by turning on the output compensation of a common bypass. Since the frequency of turning on and off the output channels is fast and cannot be distinguished by the human eye, it can significantly reduce the peak current output simultaneously by the output channels of the driver chip of the LED lamp body, power consumption, and wire voltage drop pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is the driving current waveform of the R, G, B output channels of the existing LED lamp driver chip and the corresponding three bypasses;

[0018] Figure 2 This is a driving current waveform diagram of the R, G, B output channels and a common bypass of the driving chip of the LED lamp body of an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be described below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0020] A kind of Figure 2 The load reduction method for driving an LED light string using a power carrier controlled by a power supply is shown. The time-sharing, color-mixing light string is composed of at least one LED lamp body connected in series according to pre-designed patterns including characters, animations, and patterns. The LED lamp body's driver chip output channels include R, G, and B output channels. The controller signal of the time-sharing, color-mixing light string is superimposed on the power supply and encoded with the duration of the power supply voltage change. The load reduction method is as follows:

[0021] Staggering the turn-on time of the R output channel, the G output channel, and the B output channel of the driver chip of the LED lamp body within a period T includes the following steps:

[0022] (1) First turn on the output of the R output channel, and do not turn on the output of the G output channel and the B output channel. At this time, the output of the G output channel and the B output channel are turned off;

[0023] (2) After the output of the R output channel is completed, the output of the G output channel is turned on, and the output of the B output channel is not turned on. At this time, the outputs of the R output channel and the B output channel are turned off;

[0024] (3) After the output of the G output channel is completed, the output of the B output channel is turned on, and the outputs of the R output channel and the B output channel are turned off;

[0025] After the outputs of the output channel, the G output channel, and the B output channel are all completed, if a cycle T has not yet ended, an output compensation of a common C bypass is turned on to maintain the driving current of the LED lamp body until a cycle T ends.

[0026] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art to which the present invention relates, any equivalent substitutions or obvious modifications that do not depart from the concept of the present invention and have the same performance or use should be deemed to fall within the scope of patent protection of the present invention as determined by the submitted claims.

Claims

1. A method for reducing the load of a power carrier controlled LED light string, comprising a time-sharing, color-mixing light string composed of at least one LED lamp body connected in series according to pre-designed patterns including characters, animations, and patterns. The LED lamp body's driver chip has at least one output channel. The controller signal of the time-sharing, color-mixing light string is superimposed on the power supply and encoded using the duration of the power supply voltage change. The method is characterized by: Stagger the opening time of the output channels of the LED lamp driver chip within a cycle, sequentially opening the output of each output channel of the LED lamp driver chip, and simultaneously closing the other output channels of the LED lamp driver chip; After the output of each output channel of the driver chip of the LED lamp body is completed, if a cycle has not yet ended, an output compensation of a common bypass is turned on to maintain the driving current of the LED lamp body until the end of a cycle.

2. A method for reducing the load of a power carrier controlled LED light string, comprising at least one LED lamp body connected in parallel to form a time-sharing, color-mixing light string in accordance with pre-designed patterns including characters, animations, and patterns. The LED lamp body driver chip has at least one output channel. The controller signal of the time-sharing, color-mixing light string is superimposed on the power supply and encoded with the duration of the power supply voltage change. The method is characterized by: Stagger the opening time of the output channels of the LED lamp driver chip within a cycle, sequentially opening the output of each output channel of the LED lamp driver chip, and simultaneously closing the other output channels of the LED lamp driver chip; After the output of each output channel of the driver chip of the LED lamp body is completed, if a cycle has not yet ended, there is no need to set a common bypass for output compensation.

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