CN104616622A

CN104616622A - LED (Light Emitting Diode) display screen module with memory function

Info

Publication number: CN104616622A
Application number: CN201510074400.1A
Authority: CN
Inventors: 郑先贵
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-02-12
Filing date: 2015-02-12
Publication date: 2015-05-13

Abstract

The invention provides an LED (Light Emitting Diode) display screen module with a memory function. The LED display screen module with the memory function comprises a receiving card, an adapting plate and a plurality of display screen modules; every display screen module comprises an ARM chip and an SPI-FLASH chip; the SPI-FLASH chips are arranged on the display screen modules; the ARM chips are arranged on the adapting plate; the ARM chip and the SPI-FLASH chip of every display screen module are connected through a four-line standard SPI interface; every ARM chip and the receiving card are in communication through one single line. The LED display screen module with the memory function solves the problem of tedious steps due to the fact that a traditional LED large screen replacement module or replacement control system has to again recalibrate a color coefficient and set a module pixel sequence and has the advantages of allowing plug and play, not needing once more debugging after delivery, enabling user flexible utilization to be facilitated and saving after costs.

Description

A kind of LED display module with memory function

Technical field

The present invention relates to a kind of automobile-used Polarizer, remember the circuit of self pixel color attribute and pixel order for LED display cell module, products application is in large-scale pure field of LED display such as education, indoor outer advertisement, indoor outer performance, traffic guidance, LED movie theatres.

Background technology

LED display module is one of critical piece of composition LED display finished product, forms primarily of LED, PCB, drive IC, resistance, electric capacity and plastics external member.Color correction data and the pixel order of tradition LED large-size screen monitors module can only be stored in LED display scanning board (control system) control system, change or move to other modules and just again must correct color data, the module as changed different size or pixel order just must reset pixel order and normally can show image.

Summary of the invention

Namely the present invention is for Problems existing in current LED display module, a kind of LED display module of band memory function is newly provided, solve traditional LED large-size screen monitors to change module or change control system and just again must correct color coefficients and arrange the tedious steps that module pixel order brings, there is plug and play, dispatch from the factory after do not need again to debug, facilitate the advantage of client's flexible Application and saving after cost.Specifically, the LED display module of band memory function of the present invention, comprise receiving card, card extender and several display screen module, each display screen module comprises an ARM chip and a SPI-FLASH chip, SPI-FLASH chip is positioned on display screen module, ARM chip is placed on card extender, and the ARM chip of each display screen module is connected by 4 line standard SPI interfaces with SPI-FLASH chip, and each ARM chip is communicated with receiving card by 1 single line.

Further, described receiving card is I5A-905 receiving card.

Further, 52 ~ 59pin of described 5A-905 receiving card J2 interface is display screen module communication line DATA1 ~ DATA8, and this 8pin can not use as display signal line.

DATA1 ~ DATA8 is from the J2 of I5A-905 receiving card on the pin that card extender cabling is corresponding to the ARM chip of wisdom module, and DATA1 ~ DATA8 is due to needs bidirectional data communication, and centre can not through the isolation buffer chip of the types such as 245.DATA1 ~ DATA8 circuit should be avoided showing data circuit and the larger supply line of electric current as far as possible, and reduce the various interference to DATA1 ~ DATA8 circuit, circuit cabling is as far as possible short as far as possible, ensures the stability of communication.

Further, described SPI-FLASH chip uses winboard company W25X40, or other model but be not less than the chip of 4Mbit capacity.

Further, described receiving card can be connected with 4,6 or 8 display screen modules.

Further, the ARM chip on described card extender is placed near module group display screen module, to shorten the distance of circuit between ARM and SPI-FLASH.

Display screen module can store brightness or the chromaticity correction data of module, I5A-905 can select to be loaded into display screen from display screen module to read correction data, like this after replacing module, again correction data need not be imported to receiving card, can the cumulative operation time of minute book module after display screen module powers on, the time of record is stored on module, display screen module can store the information such as the electronic tag of this module, facilitate the mark of module.

Accompanying drawing explanation

Fig. 1 is the structural representation of the embodiment of the present invention.

Embodiment

Below in conjunction with accompanying drawing, carry out nonrestrictive description to described technology contents, object better understands described technology in order to the public.

As shown in Figure 1, the LED display module of band memory function of the present invention, comprise receiving card, card extender and several display screen module, each display screen module comprises an ARM chip and a SPI-FLASH chip, SPI-FLASH chip is positioned on display screen module, ARM chip is placed on card extender, the ARM chip of each display screen module is connected by 4 line standard SPI interfaces with SPI-FLASH chip, each ARM chip is communicated with receiving card by 1 single line, described receiving card is I5A-905 receiving card, 52 ~ 59pin of described 5A-905 receiving card J2 interface is display screen module communication line DATA1 ~ DATA8, this 8pin can not use as display signal line, DATA1 ~ DATA8 from the J2 of I5A-905 receiving card on the pin that card extender cabling is corresponding to the ARM chip of wisdom module, DATA1 ~ DATA8 is due to needs bidirectional data communication, middle can not through the isolation buffer chip of the types such as 245.DATA1 ~ DATA8 circuit should be avoided showing data circuit and the larger supply line of electric current as far as possible, reduce the various interference to DATA1 ~ DATA8 circuit as far as possible, circuit cabling is as far as possible short, ensure the stability of communication, described SPI-FLASH chip uses winboard company W25X40, or other model but be not less than the chip of 4Mbit capacity.

The FLASH chip of display screen module can store brightness or the chromaticity correction coefficient of module, correction data imports on display screen module by LEDVision software, after display screen module stores correction data, in the parameter configuration of I5A-905 receiving card, select correction coefficient to derive from module, I5A-905 receiving card can directly read correction data from wisdom module and be loaded into display screen, as long as module stores the correction data of self like this after module changed by certain casing, just again correction coefficient need not be imported in receiving card.

It should be understood that, foregoing does not have any restriction to described technology contents, in fact, all improvement described structure carried out with identical or approximate principle, comprise each several part shape, size so material, and the functional equivalent of corresponding assembly is replaced, all within technology contents of the presently claimed invention.

Claims

1. the LED display module with memory function, it is characterized in that: comprise receiving card, card extender and several display screen module, each display screen module comprises an ARM chip and a SPI-FLASH chip, SPI-FLASH chip is positioned on display screen module, ARM chip is placed on card extender, the ARM chip of each display screen module is connected by 4 line standard SPI interfaces with SPI-FLASH chip, and each ARM chip is communicated with receiving card by 1 single line.

2. the LED display module of band memory function according to claim 1, is characterized in that: described receiving card is I5A-905 receiving card.

3. the LED display module of band memory function according to claim 2, is characterized in that: 52 ~ 59pin of described 5A-905 receiving card J2 interface is display screen module communication line DATA1 ~ DATA8, and this 8pin can not use as display signal line.

4. the LED display module of the band memory function according to any one of claim 1-3, is characterized in that: described SPI-FLASH chip uses winboard company W25X40, or other model but be not less than the chip of 4Mbit capacity.

5. the LED display module of the band memory function according to any one of claim 1-3, is characterized in that: described receiving card can be connected with 4,6 or 8 display screen modules.

6. the LED display module of the band memory function according to any one of claim 1-3, is characterized in that: the ARM chip on described card extender is placed near module group display screen module, to shorten the distance of circuit between ARM and SPI-FLASH.