【 Weak current College 】 LED bar Panel Assembly method 】

1.LED article screen Overview:

LED screen, as new media, graphic, motion of light-emitting more easily attract people's attention, informative, at any time update, with a very good-; advertising and signage. LED screen easier than neon light, easy to install and use, effect change more, you can update the content at any time, is very good-; of indoor and outdoor, Visual media. LED screen is high-tech electronic products, the price is quite high, previously concentrated in Government and units. Technology-; progress, price decreasing, Assembly and maintenance easier. Mini led strip screen, because the price is cheap, easy to install and use, long been big-; accept, gradually went into the shop, the more the size of the applications, to gradually start universal popularity.

2. Article screen application:

2.1. advertising application---new media, new effects, new business

LED bar screen as new media, and also the type of decoration materials that can be embedded into many interior decoration, the decoration is more full of dynamic, continuously updated titles, you can notice board as new, promotional offers and promotional information, etc. Greatly improves the interior decoration of grades, and enjoys a good visual effects. Because the LED bar screen of the installation and use of certain technical content, constraints on the development of the advertising industry. Master LED technology, you can improve the interior decoration of technical content, expand their business. -;-;

2.2. system integration--2-dev

LED bar screen, a simple control, embedded into all kinds of the equipment for the mass. Fonts, full of dynamic, informative, suitable for long-distance watch broadcast to the public in a timely manner, to attract public attention. Widely applies to the queuing system, announce system, drinking fountains, etc. LED bar panel control card, features a simple, stable, and can be easily embedded into the system, as the Developer saves development LED display of cumbersome work, to focus more on the system's functionality and innovation. LED bar panel control card development kit, provides detailed examples of development, system integration and 2 development provides very good environment.

3. Assembly of significance

LED industry chain is very perfect, all parts can be easily bought on the Internet, LED by the technical parameters, the increasingly consolidated, industry standard basic formation, all spare parts are modular. For self Assembly LED screen. LED bar display, because the material cost is low, the retail price, when the batch to the LED screen suppliers, cost and price is not well controlled. End users are not familiar with the LED screen, need vendors provide installation and maintenance services, so self Assembly LED screen, local sales, you can get the maximum profits.

For example: assembled 1 128x16 point single red LED screen of indoor, by connecting PC serial update the contents of the screen;

3.1. screen composition

Let us look at LED article screen, unit Board, power supply, control card, line

3.1.1. the unit panels

Cell plate is led display, one of the core parts, modules or bad, directly affects the display effect. Cell plate by LED module, driver IC and PCB Board composition. LED module, in fact, is a much more LED light-emitting points with resin or plastic encapsulated dot matrix. Driver IC mainly 74HC59574HC245/24474HC1384953. Indoor article screen common cell plate specifications: parameters: D = 3.75; dots 4.75mm64 point wide x16 points high, 1/16 sweeps indoor brightness. Single-red/red-green two-color parameters explained: diameter: refers to the light-emitting points diameter D = distance 4.75mm 3.75mm luminous point--– depending on the viewer's distance, indoor unit panels generally select 4.75 size: 64x16---the most commonly used unit panels, the most easy to buy, the price is the cheapest.; 1/16 sweep: cell Board of control. Indoor brightness: refers to the brightness of the LED luminous point, indoor brightness for fluorescent lighting during the day and need to rely on the environment. Color: red, most popular, price is the cheapest. Two-color generally refers to the red and green, the price is high. If you want to be a point in screen 128x16, only require 2 units plate threaded together.

3.1.2. power supply

General use of a switching power supply, 220V input, 5V DC output. It should be noted that, because of the LED display screen is a precision electronic devices, so you want to use the switching power supply, you cannot use the transformer. For one single red indoor unit panels, 64x16 dawn, current of 2A. Reasoning out, full-color screen 128x16 light when current 8A. Should select 5V10A of switching power supply.

3.1.3. Control card

We recommend the use of low-cost bar screen control card, you can control the 1/16 the Sweeper bicolor 256x16 points, you can assemble the screen on the cost advantages of the LED screen. The control card belongs to asynchronous card, that is, the card can be powered off to save information, do not need to connect a PC can display the information stored in it. Procurement Unit panels, please ask the clear parameter, 100% compatible cell Board are:

08 interface 4.75mm point distance 64 points wide x16 points high, 1/16 sweeps indoor brightness. Single-red/red-green two-color;

08 interface 7.62mm point distance 64 points wide x16 points high, 1/16 sweeps indoor brightness. Single-red/red-green two-color

08 interface 7.62mm point distance 64 points wide x16 points high, 1/16 the brightness sweep semi-outdoor. Single-red/red-green two-color

3.1.4. on 16PIN08 interface-; because of the cell boards and control card manufacturers, so the unit panels interface style, in the Assembly LED screen, you must first determine the add-inMouth consistency, is easy to assemble. Here only themost commonly used LED interface: LED industry number: 16PIN08 interface: he explained: the order of the interfaces to ABCD rows selected signal, STB (LT) for latch signal CLK (CK) is a clock signal, R2, R1, G1, G2 to display data that is displayed enabling EN, n is the ground (GND). Confirm unit panels and control card interfaces, you can connect directly. If you do not agree, you need to make a conversion (conversion at line order

3.1.5. wiring

Divided into data lines, transmission lines and power cables. Data cable for connecting the control card and LED unit panels of wire, transmission line to connect the control card and computer. Power cable, is used to connect the power supply and control cards, power supplies and LED modules. Connect the power cable from the unit Board of copper conductor diameter is not less than 1mm (mm)

3.2. accessories production

3.2.1. the cable (cable) production

Wire and computer cables inside the chassis is similar, except that the width of the line is a little different. You can buy at computer city to related materials. Making row line, you need a tool that is special pliers (picture), you can greatly improve work efficiency and yield. Production of wire materials: wire, thread, wire Cap. Here it is necessary to pay attention to it, if you make 16PIN (16 line) of the wire, you will need to purchase the line and the corresponding 16PIN size emission caps and hats. Production steps, the head and use scissors to cut flat, and then on the front row head, (Note line and head of the balance), and then into the central pressure of pliers, hard pressed and then put the lines round, the installation of a drain line cap. Drain CAP is important, you can effectively protect the wire, wire more sturdy, not provincial.

3.2.2. the power cord manufacture

Power supply is divided into 220V power and 5V power supply line. 220V power cable for connection to mains switching power supply, preferably with a 3-pin plug, you can buy at the hardware store. Here focuses on 5V DC power cord, 5V current is relatively large, it is best to use copper conductor diameter more than red black 1mm on line (be sure to red and black). The best conditions, at the ends of the line fitted with metal pieces-;-;

3.2.3.RS232 line production

RS232 cable for the connection of computer and control cards, data update screen. Here you need the DB9 's head and a network cable (you can buy at computer City). Carefully observed DB9 head, digital, 5 3 connecting Palm, will connect brown white. Will Web Clip, installed in the DB9. (This is very important, be sure to clamp to pull a few myself to see if a pull-off). Then use multimeter measuring it, whether on-. Here it should be noted that the head of the DB9 male and female Division head. Computer mother, later belonged to, so you want to buy a plug to correspond. If you do not understand please take a closer look at your PC. Now no serial port of a notebook, please purchase a USB to RS232 serial line

3.3. wiring Guide

First time installation, please follow the steps to operation, reducing the error occurred.

Step 1: check the power supply voltage, positive and negative connection out DC switching power supply, connect the power cable 220V switching power supply, (confirm connection correctly, the connection to the AC or NL terminals) and then plugged in. Will find power supply has a bright light, and then use the multimeter, DC shift measurements V + and V-voltage between, ensure that the voltage between the 4.8V-5.1V, side have the knobs to adjust the voltage of a Phillips screwdriver. In order to reduce screen fever extend life, less demanding in the brightness of the occasion, you can put between the voltage regulator to 4.5V-4.8. Confirm that the voltage is no problem, disconnect the power and continue to build other parts.

Step 2: turn off the power. The V + connect red line, V-connection to connect the black wire, riser and LED unit panels, the black line received control card and power supply GND. Red line connection control card + 5V and cell Board of VCC. Each cell Board 1 wire. When you are finished, check that the connections are correct.

Step 3: connecting the control and the unit Board, use the cable, the connection. Note the direction cannot be reversed. Please note that cell Board 2 x 16PIN connector, 1 is input, 1 output, near 74HC245/244 is input, the control card is connected to the input. Output connection to next module input.

Step 4: connect the RS232 cable that will connect the data cable to a PC serial port DB9, the other side of the connection control card of 5 pin DB9 (Brown) to connect to the control card of GND, 3 feet of the DB9 (Brown and white) to connect to the control card of RS232-RX. If your PC has no serial port, you can buy a computer city USB to RS232 serial port for converting line.

Step 5: check again whether the correct line, black lines connect-V and GND. The Red wire is connected to VCC + v, and + 5V.

Step 6: connect 220V, normally, the power light on the control card, the screen is displayed. If you are not working properly, please check the wiring. Or view the error and repair.
If the screen has two unit panels display the same content, please use the software to set the screen size is 8 characters.