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| Simple classification of LED electronic screen for advertising show | ||||
(1) It is divided into indoor, outdoor and semi outdoor according to the application environment
The indoor screen area is usually less than 1 square meter to more than 10 square meters, and the point density is high. When it is used in non direct sunlight or lighting environment, the viewing interval is several meters away, and the screen body does not have the ability of sealing and waterproof. The outdoor screen area usually ranges from several square meters to tens or even hundreds of square meters. The dot density is relatively thin (mostly 1000-4000 dots per square meter). The luminous brightness is 3000-6000cd / square meter (different directions, different brightness requirements). It can be used under direct sunlight. The viewing interval is tens of meters away. The screen has excellent wind, rain and lightning protection ability. The semi outdoor screen is between outdoor and indoor, with high luminous brightness. It can be used outdoors without direct sunlight. The screen body has certain sealing, usually under the eaves or in the window.
(2) According to the color, it is divided into monochrome, double primary color and triple primary color (full color)
Monochrome refers to the light-emitting materials of only one color on the electronic screen, most of which are single red, and yellow green can also be used in some special occasions. The dual primary color screen is usually composed of red and yellow green luminescent materials.
The three primary color screens are divided into full color, consisting of red, yellow green (wavelength 570nm), blue and true color, consisting of red, pure green (wavelength 525nm) and blue.
(3) It is divided into synchronous and asynchronous according to control or application methods
The synchronization method means that the working method of the LED electronic screen is basically the same as that of the computer monitor. It maps the computer image with the image on the monitor at the update rate of at least 30 fields / second. It usually has the color display ability of multiple gray levels and can reach the multimedia advertising function.
Asynchronous method refers to that the LED screen has the ability of storage and automatic play. The modified text and non gray images on the PC are transmitted to the LED screen through serial port or other network interfaces, and then the LED screen automatically plays offline. Usually, there is no multi gray display ability, and it is mainly used to display text information and can be networked on multiple screens.
(4) Distinguish by pixel density or pixel diameter
Because the standards of LED dot matrix screen modules selected for indoor screens are consistent, the pixel diameters of the modules are generally divided into: ∮ 3.0mm 60000 pixels / m2 ∮ 3.75mm 44000 pixels / m2 ∮ 5.0mm 17000 pixels / m2. There is no standard for the pixel diameter and pixel distance of outdoor screens. There are about 1024 points, 1600 points, 2000 points, 2500 points, 4096 points and other standards according to the number of pixels per square meter.
(5) It can be divided into:
Video electronic screen: usually full color electronic screen; Text electronic screen: usually single primary color electronic screen; Graphic electronic screen: usually double primary color electronic screen; Market electronic screen: usually digital tube or single primary color electronic screen.
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