Combined LED dot matrix display to light-emitting diodes as a pixel, it uses high-brightness LED chip array combination, and then through the epoxy resin and molded package. With high brightness, low power consumption, low lead, large viewing angle, long life, moisture, cold and heat resistance, corrosion resistance and so on.
Dot matrix display with monochrome and two colors, can display red, yellow, green, orange and so on. LED dot matrix has 4 × 4, 4 × 8, 5 × 7, 5 × 8, 8 × 8, 16 × 16, 24 × 24, 40 × 40 and so on; according to the number of pixels divided into two, , Three primary colors, etc., according to the different colors shown in the text, images and other content of the color is different, single-color dot matrix can only display fixed colors such as red, green, yellow and other monochrome, dual primary colors and three primary colors dot matrix display content Of the color by the pixels within the different color light-emitting diode combination of light to decide, such as red and green can be displayed when the yellow, if the pulse control of the diode's lighting time, you can achieve 256 or higher grayscale Display, you can achieve true color display.
Several LED dot matrix display of the internal circuit structure and appearance specifications, other types of lattice structure and pin can be tested to obtain, LED dot matrix display monolithic use, can replace the digital display digital, can also display a variety of Chinese and Western characters and symbols, such as 5 x 7 dot matrix display for the display of Western letters, 5 × 8 dot matrix display for the display of Chinese and Western, 8 x 8 dot matrix for the display of Chinese characters can also be used for graphic display. With a number of dot matrix display combination can constitute a large-screen display, but these practical devices often driven by microcomputer or microcontroller control.
LED dot matrix display by the internal structure shows that the device should use dynamic scanning drive mode, because most of the LED tube for the high brightness type, so a row or a column of single LED drive current can choose narrow pulse, but the average current Should be limited to 20mA, the majority of dot matrix display monomer LED forward voltage drop of about 2V or so, but the big bright spot ∮ 10 dot matrix display monomer LED forward voltage drop of about 6V.
Large-screen display system is generally composed of multiple LED dot matrix small module to build a combination of wood, each small module has its own independent control system, combined together as long as the introduction of a total control Control the module of the command and information can be, this method is simple and easy to develop, easy to repair the characteristics.
LED dot matrix display system in the module display methods are static and dynamic display two. Static display principle is simple, easy to control, but the hardware wiring complex, in the practical application of the general use of dynamic display, dynamic display using the way scanning work, driven by the narrow peak pulse, from top to bottom on the continuous display The screen of the row of strokes, while the column to the graphics or text messages sent to the pulse signal, repeated loop operation above, you can display a variety of graphics or text information.