CN204155589U

CN204155589U - A kind of simple and easy 16 row 32 row lattice display screen controllers

Info

Publication number: CN204155589U
Application number: CN201420612270.3U
Authority: CN
Inventors: 李倩钰
Original assignee: Jinling Institute of Technology
Current assignee: Jinling Institute of Technology
Priority date: 2014-10-22
Filing date: 2014-10-22
Publication date: 2015-02-11
Anticipated expiration: 2024-10-22

Abstract

The utility model discloses a kind of simple and easy 16 row 32 row lattice display screen controllers, it comprises micro controller module, row cutting module, row driver module, clock module, drive current amplification module, extended keyboard module and control end; Described micro controller module is electrically connected clock signal circuit by single-chip microcomputer and reset circuit forms; Described micro controller module electrical connection clock module, extended keyboard module, row cutting mould and row driver module; Described row cutting module electrical connection drive current amplification module; Described row driver module and drive current amplification module are electrically connected described control end.Simple and easy 16 row 32 row lattice display screen controllers of the present utility model, it is the basic framework forming large-scale LED-lattice Control device, by the making to 16 row 32 row lattice display screen controllers, the study of dot matrix principle of work and the course of work is of great practical significance and learns meaning.

Description

A kind of simple and easy 16 row 32 row lattice display screen controllers

Technical field

The utility model relates to a kind of simple and easy 16 row 32 row lattice display screen controllers, belongs to dot matrix component technology field.

Background technology

Along with development and the advantage of LED in low-power consumption, long-life, environmental protection etc. of LED technology, LED application increases gradually.Meanwhile, many countries, after seeing the market potential that LED is huge, launch respectively every incentives and promote the application of LED in each field energetically; At present, the application of LED turns to more potential display screen, the field such as Landscape Lighting, backlight, automobile lamp, traffic lights, illumination from the application of initial pilot lamp, and LED application is just presenting diversified development trend.LED device technology and performance improve constantly, electronic technology development make rapid progress, this also for LED display products technology in-depth and improve bring good basis; The every field that simultaneously LED is presented at social life is widely used, and therefore, LED shows market development and has very promising prospects.In-depth technical connotation, enriches product system, product diversification, the important trend that the advantage of giving prominence to leading products will be the industry development of LED display screen.Especially the application of LED lattice display is particularly extensive, and along with the high speed development of information industry, LED display becomes a glittering mark of Modern Information based Society as a kind of important hand of Information Communication.In recent years LED display has been widely used in indoor and outdoor needs the public place of carrying out service content and service aim publicity as the issue of the information such as telecommunications, postal hall, sales department, station, airport, harbour, stadiums, government bodies' policy, the issue of government decree, the issue of all kinds of market forming and publicity etc.And being applied to large, medium and small screen display along with the development LED lattice display of science and technology: various billboard, sports scores board, finance, traffic indication board etc., be divided into panchromatic, three looks, single color display screen.

The display of the sub-display screen of current LED electrical to more high brightness, more high weather resistance, higher luminescence evenly, higher reliability, panchromaticization, multimedia future development, the operation of system, operation and maintenance are also to collectionization, networking, intelligent direction development; From LED display demand, market not only needs display screen large-scale as giant-screen, also need to configure according to different place; In prior art, also do not have a give and study simple LED display screen controller.

Utility model content

(1) technical matters that will solve

For solving the problem, the utility model proposes a kind of simple and easy 16 row 32 row lattice display screen controllers; By the making to displaying screen controller, the study of dot matrix principle of work and the course of work is of great practical significance and learns meaning.

(2) technical scheme

Simple and easy 16 row 32 row lattice display screen controllers of the present utility model, comprise micro controller module, row cutting module, row driver module, clock module, drive current amplification module, extended keyboard module and control end; Described micro controller module is electrically connected clock signal circuit by single-chip microcomputer and reset circuit forms;

Described micro controller module electrical connection clock module, extended keyboard module, row cutting mould and row driver module; Described row cutting module electrical connection drive current amplification module; Described row driver module and drive current amplification module are electrically connected described control end;

Described row cutting module is made up of two panels 74HC595 driving chip and peripheral circuit;

Described drive current amplification module is made up of 16 PNP triode; Its emitter connects power supply, and base stage is connected with row cutting module; Collector contact battle array;

Described row driver module is made up of 4 74HC595 driving chip and peripheral circuit.

Further, described clock module is made up of clock chip DS1302.

Further, described clock chip is connected with power down proof battery.

Further, described extended keyboard module is made up of 4*4 matrix keyboard.

(3) beneficial effect

Compared with prior art, simple and easy 16 row 32 row lattice display screen controllers of the present utility model, it is the basic framework forming large-scale LED-lattice Control device, by the making to 16 row 32 row lattice display screen controllers, the study of dot matrix principle of work and the course of work is of great practical significance and learns meaning.

Accompanying drawing explanation

Fig. 1 is one-piece construction block diagram of the present utility model;

Fig. 2 is row cutting module principle figure of the present utility model;

Fig. 3 is drive current amplification module schematic diagram of the present utility model;

Fig. 4 is row driver module schematic diagram of the present utility model;

Fig. 5 is clock module schematic diagram of the present utility model;

Fig. 6 is extended keyboard module principle figure of the present utility model.

Embodiment

Simple and easy 16 row 32 row lattice display screen controllers as shown in Figure 1, comprise micro controller module, row cutting module, row driver module, clock module, drive current amplification module, extended keyboard module and control end; Described micro controller module is electrically connected clock signal circuit by single-chip microcomputer and reset circuit forms; Described micro controller module electrical connection clock module, extended keyboard module, row cutting mould and row driver module; Described row cutting module electrical connection drive current amplification module; Described row driver module and drive current amplification module are electrically connected described control end;

As figures 2-6, described row cutting module is made up of two panels 74HC595 driving chip and peripheral circuit; Q0 ~ the Q7 of Q0 ~ Q7 and second 74HC595 of first 74HC595 has 16 tunnel output signals; 9 pin of first 74HC595 connect 14 pin of second 74HC595; 14 pin of first 74HC595 connect single-chip microcomputer p2.0 mouths, and 8 pin of every sheet 74HC595 and 16 pin are also connected to an electric capacity; Because 10 pin of 74HC595 are clear terminals, realize when low level resetting, this circuit does not need to reset sweep signal, is therefore connect and is connected with Vcc; 11 pin of 74HC595 are the shift pulse input end of shift register; Realize displacement when its rising edge, 12 pin are that output latch squeezes into signal, when it is rising edge, the output signal of shift register are driven into output latch and latch; This design by 11 pin of two panels 74HC595 and 12 pin respectively and connect; Realize signal synchro control; 11 pin of 74HC595 connect the p2.1 mouth of single-chip microcomputer, and 12 pin of 74HC595 connect the p2.2 mouth of single-chip microcomputer;

Due to a line of dot matrix will drive 32 LED to show, by each LED component 20mA Current calculation, during 32 LED luminescences simultaneously, need 640mA electric current, because single-chip microcomputer output power is little, power iff dependence single-chip microcomputer, drive current is inadequate; Be difficult to drive dot matrix display screen; Therefore need to carry out suitable amplification by current amplification circuit, therefore add drive current amplification module; Described drive current amplification module is made up of 16 PNP triode; Its emitter connects power supply, and base stage is connected with row cutting module; Collector contact battle array; Described row driver module is made up of 4 74HC595 driving chip and peripheral circuit; Q0 ~ the Q7 of the Q0 ~ Q7 to the 4th 74HC595 of first 74HC595 has 32 road row output signals; The lowest order of first 74HC595 connects the first row of dot matrix, the like, be connected until first 74HC595 most significant digit arranges with 32 of dot matrix; 9 pin of first 74HC595 connect 14 pin of second 74HC595; Cascade successively, until 9 pin of the 3rd 74HC595 are connected with 14 pin of the 4th 74HC595; Wherein, 14 pin of first 74HC595 connect the connection of single-chip microcomputer p2.3 mouth; 10 pin of 74HC595 are clear terminals, and realize when low level resetting, this circuit does not need to reset sweep signal, is therefore connect and is connected with Vcc; The shift pulse input end (11 pin) of every sheet 74HC595 is connected with each other; Every sheet be output latch squeeze into signal (12 pin) be connected, realize signal synchro control; The wherein p2.5 mouth of shift pulse input end and single-chip microcomputer, output latch squeezes into the p2.6 mouth that signal connects single-chip microcomputer; Described clock module U2 is made up of clock chip DS1302; Described clock chip is connected with power down proof battery; CE pin has two functions, and first is the steering logic starting control word access shift register; Next is to provide the method terminating byte or multibyte data transmission; Wherein CE(5 pin) be connected with single-chip microcomputer p0.0 port.I/O(6 pin) be bidirectional data line during three-wire interface; Be connected with the p0.1 port of single-chip microcomputer; SCLK(7 pin) be serial clock input, the constrained input of control data; Be connected with the p0.2 port of single-chip microcomputer, single-chip microcomputer can call the time of DS1302A chip, also can modify to DS1302A chip clock simultaneously; During DS1302A chip operation, itself X1 and X2 port (2 pin and 3 pin) needs the crystal oscillator of a connection 32.687K; Wherein 8 pin can connect a button cell, have power down preventing function; Described extended keyboard module is made up of 4*4 matrix keyboard.

Embodiment recited above is only be described preferred implementation of the present utility model, not limits design of the present utility model and scope.Under the prerequisite not departing from the utility model design concept; the various modification that this area ordinary person makes the technical solution of the utility model and improvement; protection domain of the present utility model all should be dropped into; the technology contents of the utility model request protection, all records in detail in the claims.

Claims

1. simple and easy 16 row 32 row lattice display screen controllers, is characterized in that: comprise micro controller module, row cutting module, row driver module, clock module, drive current amplification module, extended keyboard module and control end;

Described micro controller module is electrically connected clock signal circuit by single-chip microcomputer and reset circuit forms; Described micro controller module electrical connection clock module, extended keyboard module, row cutting mould and row driver module; Described row cutting module electrical connection drive current amplification module; Described row driver module and drive current amplification module are electrically connected described control end;

Described drive current amplification module is made up of 16 PNP triode, and its emitter connects power supply, and base stage is connected with row cutting module, collector contact battle array;

2. simple and easy 16 row 32 row lattice display screen controllers according to claim 1, is characterized in that: described clock module is made up of clock chip DS1302.

3. simple and easy 16 row 32 row lattice display screen controllers according to claim 1, is characterized in that: described clock chip is connected with power down proof battery.

4. simple and easy 16 row 32 row lattice display screen controllers according to claim 1, is characterized in that: described extended keyboard module is made up of 4*4 matrix keyboard.