Câu hỏi thường gặp về Màn hình LED
led display classification
LED display categories varied substantially in accordance with the classification of the following ways:
LED display categories varied substantially in accordance with the classification of the following ways:
(1) into the environment by the use of indoor, outdoor and semi-outdoor
Indoor led screen area is generally from less than 1 square meter to more than ten meters, point higher density, in a non-direct sunlight or lighting environments, a few meters outside the viewing distance, screen body does not have the waterproof seal. Outdoor led screen area is generally from a few meters to tens or even hundreds of meters, point density than the thin (mostly 1000-4000 points per square meter), brightness at 3000-6000cd / sqm (towards the different requirements of different brightness) can be in the sun direct conditions, tens of meters outside the viewing distance, screen body with good wind resistance to rain and lightning protection capability. Semi-outdoor screen between both outdoor and indoor, with high brightness, can be used in non-direct sunlight outdoors, the screen has a certain body sealing, usually under the eaves or in the window.
(2) by color into monochrome, two-color, three-color (full color)
Monochrome display is the only one color light-emitting materials, mostly single red, green and yellow can also be used in some special occasions. Dual color screens are generally composed of red and yellow-green light-emitting materials.
Full-color screen is divided into three primary colors (full color), from red, yellow and green (wavelength 570nm), blue composition and true color (nature color), from red, pure green (wavelength 525nm), blue composition.
(3) Press the control or use of synchronous and asynchronous
Synchronization is the LED display works basically the same as a computer monitor, it is to update the rate of at least 30 fields / sec bit map corresponding to the real computer like Figure monitor, usually with multi-gray color display ability to achieve multimedia advertising effect.
Asynchronous mode is the LED screen with storage and the ability to automatically play on PC, edited the text and grayscale images without LED screen via the serial interface to an incoming or other network, and then automatically play offline by the LED screen, generally no more than ash degree display capabilities, primarily used to display text information, you can multi-screen network.
(4) pixel by pixel density or diameter divided
Since the internal display LED dot matrix module specifications households used more unified pixel diameter and are usually classified according to the main modules: ∮ 3.0mm 60000 pixels / square meter ∮ 3.75mm 44000 pixels / square meter ∮ 5.0mm 17000 pixels / square meter, outdoor screen pixels diameter and the pixel pitch is currently no uniform standard, the number of pixels per square meter are about 1024 points, 1600 points, 2000 points, 2500 points to 4096 points, and other specifications.
(5) can be divided by the display performance
Video Display: generally full-color display; text display: usually single color display; graphic display: usually dual color display; Quotes display: generally digital tube or single-color display.
LED display classification can be classified from the following criteria:
Color
LED display, divided into full-color display, monochrome (single color) display (one red, one white, one yellow) and color (two-color) display (red-green, blue-green)
Environment
LED display, and can be divided into: indoor LED display, semi-outdoor LED display and outdoor LED display.
Installation
LED display can be divided into: Column LED display (single column and double column), wall-mounted LED display, ceiling-mounted display, embedded displays.
Use
LED display is divided into: information dissemination screen, traffic guidance screen, advertising screen, car screen, stadium screen, stage rental screen and stairs screens
Shape
LED display screen can be divided into conventional and shaped screen.
Single color display
Single color (red, green, yellow, white, blue, etc.).
Dual color display:
Red and green dual-color, 256 or 512 gray gray, you can display 65,536 colors.
Full color display:
Red, green, and blue color, 256 grayscale full color display can display more than sixteen million kinds of colors.
Indoor display:
Luminous point is small, generally Φ3mm - Φ8mm, shows the general area a few to a dozen meters.
Semi-outdoor display:
Pixel sizes between the indoor and outdoor displays; common in banks, hospitals, shopping malls or lintel.
Outdoor display:
The general area of tens of meters to several hundred meters, high brightness, can work in the sun, with wind, rain, waterproof