With the rapid development of led display technology, led display products such as LED electronic displays and LED full-color displays are showing a diversified development. Today's led displays are widely used in all walks of life, but for For novices, many professional terms of led display are not understood, so what are the common professional terms of led display?
1. LED brightness: The brightness of light-emitting diodes is generally expressed by luminous intensity (Luminous Intensity), the unit is candela cd; 1000ucd (microcandela) = 1 mcd (millicandela), 1000mcd = 1 cd. The light intensity of a single LED for indoor use is generally 500ucd-50 mcd, while the light intensity of a single LED for outdoor use should generally be 100 mcd-1000 mcd, or even more than 1000 mcd.
2, LED pixel module: LEDs are arranged in a matrix or pen segment, pre-made into standard size modules. Commonly used indoor display screens are 88 pixel modules and 8-character 7-segment digital modules. Outdoor display pixel modules have specifications such as 44, 88, 816 pixels. The pixel module used in outdoor display screens is also called the collective tube bundle module because each pixel is composed of more than two LED tube bundles.
3. Pixel and pixel diameter: Each LED light-emitting unit (dot) in the LED display screen that can be individually controlled is called a pixel (or pixel). Pixel diameter ∮ refers to the diameter of each pixel, in millimeters.
4. Resolution: The number of rows and columns of pixels on the led display is called the resolution of the led display. Resolution is the total number of pixels of the display screen, which determines the information capacity of a display screen.
5. Grayscale: Grayscale refers to the degree of light-dark changes of pixels. The grayscale of a primary color generally has 8 to 12 levels. For example, if the gray scale of each primary color is 256 levels, for a dual primary color screen, the display color is 256256=64K colors, which is also called a 256-color display screen.
6. Dual primary color: Most color LED display screens nowadays are dual primary color color screens, that is, each pixel has two LED dies: one is red light and the other is green light. When the red light die is on, the pixel is red, when the green light is on, the pixel is green, and when the red and green die are on at the same time, the pixel is yellow. Among them, red and green are called primary colors.
7. Full color: Red and green double primary colors plus blue primary color, three primary colors constitute full color. Since the technology for forming a full-color blue tube and a pure green tube core is now mature, the market basically uses full-color.
