Cascaded light-emitting diode light string with low power consumption

Abstract

The invention provides a cascaded light-emitting diode light string with low power consumption, which includes a main light string and at least one sub-light string, wherein the main light string receives a carrier light-emitting signal to control a light-emitting diode module to emit light; the sub-light string is cascaded with the main light string; a signal intensifier of the sub-light string enhances the carrier light-emitting signal to drive the light-emitting diode module to emit light; and when the voltage of the carrier light-emitting signal is lower than the low level voltage, the light-emitting diode module enters a low power consumption mode.

Description

technical field [0001] The invention relates to a light-emitting diode lamp string, in particular to a cascaded light-emitting diode light string with low power consumption. Background technique [0002] Because light-emitting diodes (light-emitting diodes, LEDs) have the advantages of high luminous efficiency, low power consumption, long life, fast response, and high reliability, light-emitting diodes have been widely used as light bars or lamps. The series, parallel, or series-parallel connection of light strings is applied to lighting fixtures or decorative lighting, such as Christmas tree lighting, sports shoes lighting effects, and the like. [0003] Taking festive lighting as an example, a complete LED lighting basically includes a string of LED lights (with multiple lights) and a driving unit for driving the lights. The drive unit is electrically connected to the lamp string, and by providing the lamp with the required power and a control signal with luminous data, i...

AI Technical Summary

Problems solved by technology

[0004] However, when multiple (bar) light strings are cascaded in series, because the light strings of the subsequent stage are likely to cause signal attenuation when the data signal of the previous stage is transmitted to the subsequent stage due to the long line, resulting in The data signal received by the light string cannot be identified or judged as noise, which causes the light string of the subsequent stage to not correctly present its lighting behavior (method), such as color change, on / off (dark) mode, on / off frequency

[0005] Furthermore, in order to ensure that the light-emitting control signal can be correctly identified as a low-level voltage, it is common to control the light-emitting control signal to quickly reduce its voltage level through a fast discharge circuit, or the total parasitic capacitance of the line is small The light-emitting diode light string is easy to make the light-emitting control signal quickly reduce its voltage level

However, when the light-emitting control signal drops rapidly, it is easy to happen that the light-emitting control signal is lower than the identifiable low-level voltage, and then continues to drop rapidly, so that the light-emitting control signal touches the reset voltage, causing unnecessary reset errors in the circuit. action, resulting in abnormal judgment and malfunction of the LED module

Images