Dot-matrix Display

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Dot-matrix Display can be used in many aspects,like:

Display in subway station;

display in bank,supermarket,school;

information board in hospital;

automotive advertising screen;

electric gate information screen and so on.

Products in photo album are part of main products in my company.And we also can

manufacture other model according to the requirements from customers.

Looking forward to your inquiry!

Q: What is the difference between LED entry and LED array?: Direct type LED light source number in several times higher than the side. So the cost is higher, the direct type partition can realize intelligent dynamic backlight control technology, which can realize the lateral body slim (three cm), direct type usually body thickness is above three cm to five cm or more thick. This is the contradiction between the quality and the ultra-thin, want to slim, you have to sacrifice the quality of the picture, but for average users, about four or five centimeters of thickness is also very thin.

Q: LED dot matrix screen common anode and common cathode how to distinguish?: Judging by the multimeter, multimeter in a diode detection gear pin probe connected to the digital tube,This section of the digital tube can be lit in the forward direction.

Q: Want to buy a 8*8LED dot matrix screen, do you want 64 resistors? Single chip microcomputer!: Generally buy 8 transistors and eight resistors on the line

Q: Ask God for help, SCM can directly drive LED dot matrix? If not, what about the drive circuit? Can you give me a map?: If you are using STC 5V51 Series MCU, the maximum input current is 120 mA, is basically up about half. A mouth, a mouth, the output must be strong pull, the input current, but if so, the microcontroller will be in a relatively limited state, and brightness will receive some impact. If you don't light up a lot, it's not necessarily bad.

Q: The system is self-made, divided into control module (mainly 51 microcontroller) and LED dot matrix screen, the driver chip is 138 and 595, using 8550 transistor amplification, current limiting resistor 330 ou. Baidu checked, said, 64 * 16 dot matrix screen requires 5v40A switching power supply, then this power can not be 51 SCM power supply at the same time? I forget, 64*16 dot matrix screen when all lit...: One can be used, but direct power is not recommended. You're all on the A scale. The output of the switching power supply is not very stable. Build a regulator chip.Switching power supplies do not allow him to work at full capacity. You don't have much chance to shine all the time, but it's better to keep the wattage off the threshold.

Q: LED dot matrix with single-chip microcomputer is how to control?: In principle, and digital control is the same method of control, a digital tube is equivalent to a row of 8 lights

Q: We use 74LS138 and 74lS160 drive 8*8LeD dot matrix display, the circuit diagram should be what kind of ah, solve ah!: On the network many diagrams, this is the expansion of the mouth of the IC, because the microcontroller IO port is limited and the current is small, can not be directly driven, you need to expand and drive

Q: I want to display the characters that move around on the LED dot matrix. What does the program do, and what other components do I need?: I learned programming. As far as I can see, which elements of the shape of the words are controlled on the dot matrix, and then in a sequential manner, in a recursive manner (increasing the number of lights in the loop), all the way to the end, and then the loop.

Q: Why are the pixel sizes (LED) of the LED dot matrix module and the LED dot matrix display so large? Only 3.0mm, 3.7mm, 5.0mm, in the big diameter pixel resolution and pixel density is very low, in view of a strong sense of particle, why not make the pixel diameter small? For example, 1mm below, so that the unit area of pixel density is very high, how to solve? What is a single LED dot matrix module?...: If the matrix module is broken, it will be changed. Small is to save maintenance costs. Also, it's easy to assemble.

Q: The dot matrix brightness of single chip computer is inconsistent: With the MOS line (4953) connected to a power supply, the gate of MOS transistor by MCU controlled directly or by 74138 after decoding control, 62726 control lines, 62726 is the constant current driver, serial input and parallel output, designed for LED lattice design driven.

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