LED string light controller for carrying out control by utilizing DC carrier communication

Abstract

The invention discloses an LED string light controller for carrying out control by utilizing DC carrier communication. The LED string light controller is characterized by comprising an AC / DC converter, a voltage stabilizing circuit, a microprocessor, a single modulation circuit and a voltage conversion control module; an output end of the AC / DC converter is connected with an input end of the voltage conversion control module through the voltage stabilizing circuit; two output ends of the microprocessor are respectively connected with an input end of the single modulation circuit and a control end of the voltage conversion control module; and an output end of the single modulation circuit is connected with an output end of the voltage conversion control module, and serves as an LED string light output end to be connected with an LED string light. The LED string light controller has the advantages that a power cord is utilized to transfer control signals so that a signal line can be saved and only two lines are required; through communication data, the signal generation of the controller can be realized more easily; the quantity of LED light beads is not limited; and the LED light beads in the LED string light are connected in parallel, so that if one LED is damaged, the other LEDs are not influenced.

Description

technical field [0001] The invention relates to an LED lamp string controller controlled by direct current carrier communication. Background technique [0002] The communication of the existing LED light string control signals is mostly realized by the way of serial connection and transmission of single data lines, which has the following disadvantages: [0003] 1) A maximum of 1024 lamp beads can be connected in series, and there is a limit on the number; [0004] 2) When the serial connection exceeds a certain number, the communication speed will be greatly reduced (for example, the communication time of a single LED is only about 30us (1us / bit), but it takes 3ms for 100 LED beads to be connected in series); [0005] 3) In order to ensure the immediacy of communication, there are large restrictions on the controller that generates the signal, and the operating speed of the controller core usually needs to be greater than 20M to meet the requirements; [0006] 4) If one L...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide an LED light string assembly controlled by DC carrier communication, which mainly solves the problem of too long communication time and redundant connecting wires in LED light string products when the number of LEDs in series exceeds a certain number. question

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