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Do You Know These Related Knowledge About LED Display ?

Shenzhen Lights Technology Co.,Ltd | Updated: Mar 27, 2017

1. LED brightness

The brightness of the light-emitting diodes is generally expressed as luminous intensity (Luminous Intensity), the unit is candela cd; 1000ucd (micro-candela) = 1 mcd (mm candela), 1000mcd = 1 cd. Indoor light intensity of a single LED is generally 500ucd-50 mcd, and outdoor use a single LED light intensity should generally be 100 mcd-1000 mcd, or even 1000 mcd above.


2. LED pixel module

LED arranged in a matrix or pen section, preformed into the standard size of the module. Indoor LED display commonly used 8 * 8 pixel module, 8 words 7 digital module. Outdoor LED display pixel module with 4 * 4,8 * 8,8 * 16 pixels and other specifications. Outdoor display with the pixel module because each pixel consists of more than two LED tube bundle composition, it is also known as the tube bundle module.


3. Pixel (Pixel) and pixel diameter

Each LED display in the LED can be individually controlled by the LED light-emitting unit (point) called pixels (or pixels). The pixel diameter ∮ refers to the diameter of each pixel in millimeters.

For the indoor display, the general one for a single LED, shape for the round. Indoor display pixel diameter school common ∮ 3.0, ∮ 3.75, ∮ 5.0, ∮8.0, which ∮ 3.75 and ∮ 5.0 up.

In the outdoor environment, in order to improve the brightness, increase the line of sight, a pixel contains more than two cluster LED; as more than two cluster LED is generally not round, so the outdoor display pixel diameter is generally two or two pixels average spacing : PH10, PH11.5, PH16, PH22, PH25.


4. Point spacing, pixel density and information capacity

(Dot Pitch); the number of pixels per unit area is called the pixel density; the number of displayed content per unit area is called the information capacity. The three essence is to describe the same concept: point spacing is the distance between the two pixels to reflect the pixel density, point spacing and pixel density is the physical properties of the display; information capacity is the pixel density of information bearing capacity The number of units.

The smaller the pitch, the higher the pixel density, the more information about the capacity, the closer the distance is. The larger the pitch, the lower the pixel density, the less the information capacity, the farther away from the viewing distance.


5. Resolution

LED display pixel ranks the number of columns known as the LED display resolution. The resolution is the total amount of pixels in the display, which determines the information capacity of a display.


6. LED display (LED Panel)

The LED pixel module in accordance with the actual needs of the size of assembled in a matrix, together with a dedicated display drive circuit, DC power supply, software, frame and external decoration, which constitutes a LED display.


7. Grayscale

Grayscale refers to the degree of light and shade changes in the degree of gray, a primary color gray level generally 8 to 1024. For example, if the gray value of each primary color is 256, for the dual color color screen, the display color is 256 × 256 = 64K color, also known as the screen for the 256 color display.


8. Double color

Most of today's color LED display is a dual-color color screen, that is, each pixel has two LED die: one for the red die, one for the green die. When the red light is on, the pixel is red, and when the green light is on, the pixel is green and the red and green dice are bright. Where red and green are called primary colors.


9. Full color

Red and green double color plus blue base color, three kinds of primary colors to form full color. As the full color of the blue tube and pure green die technology is now mature, so the market basically with full color.


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