CN208208299U

CN208208299U - MCU driving LED display screen system based on serial data input

Info

Publication number: CN208208299U
Application number: CN201820322209.3U
Authority: CN
Inventors: 刘超祥; 曾曙辉
Original assignee: Shenzhen Public Intelligent Management Co Ltd
Current assignee: Shenzhen Public Intelligent Management Co Ltd
Priority date: 2018-03-09
Filing date: 2018-03-09
Publication date: 2018-12-07
Anticipated expiration: 2028-03-09

Abstract

The utility model relates to technical field of electronic equipment, a kind of MCU driving LED display screen system based on serial data input is provided, it include: hardware system and software systems, the hardware system includes data input cell, timing control unit, LED constant current control unit and display execution unit, the software systems include data processing unit, LED constant current control logic, interrupt processing control logic and row field sweep anchor timing and execute logic, Visual Display Data is sent into the data input cell by UART, successively pass through the timing control unit, LED constant current control unit, the display matrix of 16 column of output and 32 rows reaches display execution unit, the utility model is simple, it is economical, it is practical, effectively, it is suitble in the display screen driving that no TCON is controlled, LED constant current of arranging in pairs or groups drives core Piece forms driver' s timing in conjunction with relevant logic circuit, and combines original and different control algolithm, sweeps being precisely controlled for anchor to reach, and is particularly suitable for showing in application in small size LED dot matrix.

Description

MCU driving LED display screen system based on serial data input

Technical field

The utility model relates to technical field of electronic equipment more particularly to a kind of single-chip microcontroller drives based on serial data input Dynamic LED display screen system.

Background technique

Currently, on the market the row field of the true colour display screen display screen of LED sweep anchor show usually require by special TCON chip or Fpga logic door builds special application system to realize, but few people's research is such with the pure true color screen of MCU driving LED It is very color to need to study a kind of pure MCU driving LED played under the support of card system in no TCON and dedicated video for mode The display system of display screen.

Utility model content

The purpose of this utility model is to provide a kind of economic, practical, effective single-chip microcontrollers based on serial data input LED display screen system is driven, which can directly be passed through under the display screen driving that no TCON is controlled by single-chip microcontroller LED display is driven, LED constant current driving chip of arranging in pairs or groups forms driver' s timing in conjunction with relevant logic circuit, and combines unique The control algolithm of ingenuity sweeps being precisely controlled for anchor to reach display screen, especially in the display application of small size LED dot matrix.

In order to achieve the above purposes, the technical solution adopted by the utility model is: it is a kind of based on serial data input monolithic Machine drives LED display screen system, comprising: hardware system and software systems, the hardware system include data input cell, timing Control unit, LED constant current control unit and display execution unit, the software systems include data processing unit, LED constant current Control logic, interrupt processing control logic and row field sweep anchor timing and execute logic, described in Visual Display Data is sent into as UART Data input cell successively passes through the timing control unit, LED constant current control unit, the display square of output 16 column and 32 rows Battle array reaches display execution unit.

Further, the timing control unit generates time sequence control logic by M0519 single-chip microcontroller, and the timing control is patrolled Collecting includes row control logic and column control logic, and the row control logic is by gating chip MBI5947 and 74HC138 decoder It collectively constitutes, the column control logic is mainly generated by the M0519 single-chip microcontroller.

Further, the LED constant current control unit is realized by the MBI5353 chip of the poly- letter science and technology of TaiWan, China, institute State the input of LED constant current control unit frame data to be shown be input to by M0519 single-chip microcontroller by the mode of SPI it is described In the SRAM memory space of MBI5353 built-in chip type, the SRAM memory space is divided into SRAM A and SRAM B two parts, SRAM A is that the data SRAM B currently shown is data to be shown, and the mode by writing storage device controls each channel Brightness is exported, and different grayscale is presented.

Further, the clock hardware port of a SPI of the M0519 single-chip microcontroller is set as DCLK, the DCLK Clock sends the counter input of the M0519 single-chip microcontroller back to, counts to pulse number, and generates interruption, and by defeated The data output of foot LE coordinated control MBI5353 is latched out.

Further, the display execution unit is made of the matrix that 16*32 row three-color LED is formed, and the LED selects state 1615 type lamp beads of starlight electricity, it is evenly distributed with the spacing of 1.5mm between lamp bead and lamp bead.

Further, every MBI5947 can control 4 row timesharing gating, totally 8 chips can 32 row of Time-sharing control, i.e., by 8 Piece MBI5947 and 74HC138 collectively constitute 32 row timesharing driving logic circuits.

Compared with prior art, a kind of MCU driving LED based on serial data input provided by the utility model is aobvious Display screen system, it is simple, economic, practical, effective, it is suitble in the display screen driving that no TCON is controlled, collocation LED constant current driving Chip forms driver' s timing in conjunction with relevant logic circuit, and combines original and different control algolithm, to reach the essence for sweeping anchor Quasi- control is particularly suitable for showing in application in small size LED dot matrix.

Detailed description of the invention

Fig. 1 is a kind of MCU driving LED display screen system based on serial data input provided by the utility model Functional block diagram.

Specific embodiment

It is practical new to this with reference to the accompanying drawing in order to be more clearly understood that the purpose of this utility model, technical solution and advantage The preferred embodiment that type provides does specific detailed description.It should be appreciated that specific embodiment described herein is only used to solve The utility model is released, is not used to limit the utility model, based on the embodiments of the present invention, ordinary skill people Member's every other embodiment obtained without making creative work, belongs to the model of the utility model protection It encloses.

Fig. 1 is please referred to, is a preferred embodiment of the utility model, a kind of MCU driving based on serial data input LED display screen system, comprising: hardware system and software systems, the hardware system include data input cell, timing control list Member, LED constant current control unit and display execution unit, the software systems include data processing unit, LED constant current control patrol Volume, interrupt processing control logic and row field sweep anchor timing and execute logic, it is defeated that Visual Display Data by UART is sent into the data Enter unit, successively passes through the timing control unit, LED constant current control unit, the display matrix arrival of 16 column of output and 32 rows Show execution unit.

Specifically, the timing control unit generates time sequence control logic by M0519 single-chip microcontroller 1, and the timing control is patrolled Collecting includes row control logic and column control logic, and the row control logic is by gating chip MBI59474 and 74HC138 decoder 3 collectively constitute, and the column control logic is mainly generated by the M0519 single-chip microcontroller 1.

Specifically, the LED constant current control unit is realized by the MBI5353 chip 2 of the poly- letter science and technology of TaiWan, China, institute State the input of LED constant current control unit frame data to be shown be input to by M0519 single-chip microcontroller by the mode of SPI it is described In SRAM memory space built in MBI5353 chip 2, the SRAM memory space is divided into SRAM A and SRAM B two parts, SRAM A is that the data SRAM B currently shown is data to be shown, and the mode by writing storage device controls the defeated of each channel Brightness out, and different grayscale is presented.

Specifically, the clock hardware port of a SPI of the M0519 single-chip microcontroller 1 is set as DCLK, when the DCLK Clock sends the counter input of the M0519 single-chip microcontroller 1 back to, counts to pulse number, and generates interruption, and passes through output Latch the data output of foot LE coordinated control MBI5353 chip 2.

Specifically, the display execution unit is made of the LED dot matrix 5 that 16*32 row three-color LED is formed, and the LED is selected 1615 type lamp beads of state's starlight electricity, it is evenly distributed with the spacing of 1.5mm between the lamp bead and lamp bead.

Specifically, 32 row timesharing driving logic circuits are collectively constituted by 8 MBI5947 and 74HC138.The system, simple, It is economic, practical, effective, it is suitble in the display screen driving that no TCON is controlled, LED constant current driving chip of arranging in pairs or groups, in conjunction with correlation Logic circuit form driver' s timing, and combine original and different control algolithm, sweep being precisely controlled for anchor to reach, it is especially suitable It closes in the display application of small size LED dot matrix.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model Protection scope within.

Claims

1. a kind of MCU driving LED display screen system based on serial data input characterized by comprising hardware system And software systems, the hardware system include data input cell, timing control unit, LED constant current control unit and display Execution unit, the software systems include data processing unit, LED constant current control logic, interrupt processing control logic and row Field sweeps anchor timing and executes logic, and Visual Display Data is sent into the data input cell by UART, successively passes through the timing control Unit processed, LED constant current control unit reach display execution unit.

2. the MCU driving LED display screen system according to claim 1 based on serial data input, feature exist In: the timing control unit generates time sequence control logic by M0519 single-chip microcontroller, and the time sequence control logic includes that row control is patrolled It collects and column control logic, the row control logic is collectively constituted by gating chip MBI5947 and 74HC138 decoder, the column Control logic is mainly generated by the M0519 single-chip microcontroller.

3. the MCU driving LED display screen system according to claim 1 based on serial data input, feature exist In: the LED constant current control unit is realized that the LED constant current control unit frame data to be shown are defeated by MBI5353 chip Enter and is input in the SRAM memory space of the MBI5353 built-in chip type by M0519 single-chip microcontroller by the mode of SPI, it is described SRAM memory space is divided into SRAM A and SRAM B two parts, and SRAM A is that the data SRAM B currently shown is number to be shown According to the mode by writing storage device controls the output brightness in each channel, and different grayscale is presented.

4. the MCU driving LED display screen system according to claim 2 or 3 based on serial data input, feature Be: the clock hardware port of a SPI of the M0519 single-chip microcontroller is set as DCLK, and the DCLK clock is sent back to described The counter input of M0519 single-chip microcontroller, counts pulse number, and generates interruption, latches foot LE by output and coordinates Control the data output of MBI5353.

5. the MCU driving LED display screen system according to claim 1 based on serial data input, feature exist In: the display execution unit is made of the matrix that 16*32 row three-color LED is formed, and the LED selects the 1615 of state's starlight electricity Type lamp bead, it is evenly distributed with the spacing of 1.5mm between the lamp bead.