LED driving circuit as well as serial communication system therewith and communication method

Abstract

The invention discloses an LED driving circuit as well as a serial communication system therewith. The serial communication system comprises a host computer and N slave computers, wherein the host computer comprises a sending terminal, each slave computer comprises a receiving terminal and a sending terminal; the sending terminal of the host computer is connected with the receiving terminal of a first slave computer, the sending terminal of the slave computer is connected in series with the receiving terminal of the next slave computer; and each slave computer also comprises a communication mode register controlling the slave computer to be in a direct-connection mode or a cascade connection mode. When a slave computer is in the direct-connection mode, the receiving terminal of the slave computer receives and directly sends a data transmission time sequence to the sending terminal of the slave computer. When a slave computer is in the cascade connection mode, the receiving terminal ofthe slave computer receives, analyzes and judges whether to send the data transmission time sequence or not according to an analyzed instruction and generates and sends a new data transmission time sequence to the sending terminal of the slave computer if the data need sending. The serial communication system is adopted for communication so that the host computer can control a gigantic amount of slave computers, has simple wiring and stronger anti-jamming capacity; and the addresses of the slave computers can be conveniently and rapidly configured by the invention.

Description

technical field [0001] The invention relates to an LED drive circuit and a communication technology that can constitute a serial communication system. Background technique [0002] In the widely existing system composed of LED control circuit and LED drive circuit, the LED control circuit and multiple LED drive circuits are connected in series through the data signal line, connected in parallel through the clock signal line and the latch signal line; through the serial connection of the data signal line With the cooperation of the clock signal line, the LED control circuit sends the data to the serially connected LED drive circuit in turn; through the parallel connection of the latch signal line, the LED control circuit sends data latch instructions to all LED drive circuits at the same time; due to the clock signal The output port of an LED control circuit is limited by the driving capability. If it is necessary to drive a large number of input ports of the LED drive circui...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the shortcomings of the existing LED control circuit and LED drive circuit system, and provides an LED drive circuit that can form a serial connection communication system. The LED control circuit and a large number of LED drive circuits are connected in series through a single line Communication Systems

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