Combined LED dot matrix display since the 1980s, began to light-emitting diodes for pixels, with its high-brightness light-emitting diode array core portfolio, and epoxy package from mold. High brightness, low power consumption, small pin, the perspective of large, long life, humidity, heat resistance, corrosion resistance and so on.

Dot-matrix displays are two types of monochrome and color display red, yellow, green, orange and so on. LED dot matrix there are 4 × 4,4 × 8,5 × 7,5 × 8, 8 × 8,16 × 16,24 × 24,40 × 40 and other; based on the number of pixels divided into two, and so on, two-color, Trichromatic, and so on, according to the pixels of different colors shown in the text, images and so on a different color, single-color dot-matrix display can only be fixed if the color red, green, yellow color and so on, two-and three-color dot-matrix color display The contents of the color pixels with different color from light-emitting diodes to light up the portfolio to determine if both red and green light shows when the yellow, according to the control of a pulse of light emitting diode, can achieve 256 or more high-level grayscale display can be Achieve true color display.

Several LED dot matrix display of the internal structure of the circuit and appearance standards, other types of lattice structure of the pin and can be tested, LED dot matrix display using a single block, can replace the LED digital display, can also display a variety of Chinese and Western characters and symbols. If the 5 x 7 dot matrix display to show the mother language of the West. 5 × 8 dot-matrix display to display text and Western, 8 x 8 dot matrix display for the Chinese language can also be used to display graphics. Dot-matrix display with multi-block combination can pose a large-screen display, but often such practical device or computer through the single-chip driver control.
LED dot-matrix-driven scanning program

LED dot matrix display by the internal structure, we can see that the device should be used to scan the dynamic drive, LED die as a result most of the higher-brightness, so a certain line or out of a single current LED driver can choose a narrow pulse, but the average current Should be limited within 20mA. Most of the single dot matrix display LED forward voltage drop of about 2V or so. But the big bright spot ∮ 10 of the single dot matrix display LED forward voltage drop of about 6V.

Large-screen display system will be more than is the general comprised of small dot-matrix LED modules to Block combination of the way, every small module has its own independent control system, together as long as after the introduction of a general controller Control of the command module and data can be, this method is simple and easy with the exhibition, easy maintenance features.

LED dot matrix display system in each module of the display are two types of static and dynamic show. Static display simple, easy to control, but the hardware complexity of the wiring in the practical application of the general dynamic display, dynamic display by scanning the way, from a peak of more narrow pulse drive, from top to bottom successive constantly on the screen The line for the strobe, and at the same time to send out text messages or graphics that pulse signal, the cycle repeated over operation can show a variety of graphics or text message.