Intelligent LED (light emitting diode) driving signal transmission multiplexing circuit

Abstract

The invention discloses an intelligent LED (light emitting diode) driving signal transmission multiplexing circuit and belongs to an LED signal driving circuit. The circuit internally comprises a signal amplification chip and at least two serial rotation parallel chips; the serial rotation parallel chips are switched in the signal amplification chip; after the signal amplification chip amplifies serial control signals which are received from a circuit, the serial control signals are transmitted to the serial rotation parallel chips; the circuit also comprises a multi-way relay device; the serial rotation parallel chips are respectively switched in the multi-way relay device, wherein one serial rotation parallel chip is also connected with an LED lamp fitting; the circuit is also internally provided with a single chip micyoco; and the single chip micyoco is respectively connected with the signal amplification chip, the serial rotation parallel chips and the multi-way relay device through signal lines. The intelligent LED driving signal transmission multiplexing circuit provided by the invention has a simple structure, the technical effect brought about by a DMX512 control mode can be realized without writing in the address of the LED light fitting in each unit, the circuit can be applied to various types of LED control circuits, and is easy to popularize.

Description

technical field [0001] The invention relates to an LED signal drive circuit, in particular to an intelligent LED drive signal transmission multiplexing circuit. Background technique [0002] At present, the LED control technology is relatively mature. The LED control circuit can be used to control the on and off states of the LED lamps. However, there have been various problems since the birth of the original LED control circuit. Parallel chips such as 595 series, 9712 series, 6803 series, and 2801 series realize that the circuit can also transmit control signals while connecting LEDs in series. Its advantage is that there are fewer transmission lines and more control points. Its disadvantage is that the signal in the circuit is purely serial transmission. When a problem occurs in one of the serial-to-parallel chips, the subsequent chips will not receive signals or receive errors. The signal causes some LED lamps in the circuit to be unusable. In order to overcome this shor...

AI Technical Summary

Problems solved by technology

[0002] At present, the LED control technology is relatively mature. The LED control circuit can be used to control the on and off states of the LED lamps. However, there have been various problems since the birth of the original LED control circuit. Parallel chips such as 595 series, 9712 series, 6803 series, and 2801 series realize that the circuit can also transmit control signals while connecting LEDs in series. Its advantage is that there are fewer transmission lines and more control points. Its disadvantage is that the signal in the circuit is purely serial transmission. When a problem occurs in one of the serial-to-parallel chips, the subsequent chips will not receive signals or receive errors. The signal causes some LED lamps in the circuit to be unusable. In order to overcome this shortcoming in the field, a new control method DMX512 has become popular. Although DMX512 is theoretically a problem with the serial-to-parallel chip in one unit, it will not It affects the use of LED lamps in other units in the circuit, but in actual use, its shortcomings are also fatal. One is that the addresses need to be written one by one for the LED lamps in each unit before the circuit is used, and the addresses cannot be the same. Second, if there is a problem with a certain unit transmission point and the bus voltage is clamped, other points will also be seriously affected, such as insufficient voltage, etc., and this situation is the most common problem in construction sites using the DMX512 control method, so the DMX512 control method There are different defects in the traditional serial-to-parallel chip serial signal transmission method, and it is necessary to further improve the LED control circuit

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