(1) Divided into indoor, outdoor and semi-outdoor according to the use environment
The indoor screen area is generally less than 1 square meter to more than ten square meters. The indoor led display is used in indoor environment. This type of display has moderate brightness, large viewing angle, close color mixing distance, light weight and high density. It is suitable for closer viewing. .
The outdoor screen area is generally from a few square meters to tens or even hundreds of square meters, the point density is relatively thin (more than 2500-10000 points per square meter), the brightness of the light is 5500-8500cd / square meter (different direction, different brightness requirements), in the sun It is used under direct shooting conditions, and the viewing distance is several tens of meters away. The screen body has good wind, rain and lightning protection capabilities.
The semi-outdoor screen is between the outdoor and the indoors. It has a high luminous brightness and can be used outdoors under direct sunlight. The screen has a certain seal, usually under the eaves or in the window.
(2) Divided into monochrome by color, double primary color, and three primary colors (full color)
Monochrome refers to a luminescent material with only one color on the display, mostly single red, and yellow green in some special occasions (such as funeral homes).
The dual-primary LED display consists of red and green led lights, and the 256-level gray dual-color display can display 65,536 colors (two-color screen can display red, green, and yellow colors).
The full-color LED display consists of red, green and blue LED lights that display white balance and 16,777,216 colors.
(3) Synchronous and asynchronous by control or usage
Synchronous mode means that the LED display works basically the same as the monitor of the computer. It maps the computer image to the map on the real monitor with an update rate of at least 30 fields/second, usually with multi-gradation color display. Ability to achieve multimedia advertising effects.
Asynchronous mode means that the LED screen has the ability to store and play automatically. The edited text and non-grayscale pictures on the PC are transmitted to the LED screen through the serial port or other network interface, and then automatically played by the LED screen offline. Generally, there is no gray. The display capability is mainly used to display text information and can be multi-screened.
(4) Divided by pixel density or pixel diameter
Since the LED dot matrix module used in the indoor screen has relatively uniform specifications, it is usually divided according to the pixel diameter of the module: ∮ 3.0mm 62500 pixels / square meter ∮ 3.75mm 44321 pixels / square meter ∮ 5.0mm 17222 pixels / square meter
Indoor surface mount pixel points:
P2.5 160000 points / square meter
P3 111111 points / square meter
P4 62500 points / square meter
P5 40000 points / square meter
P6 27777 points / square meter
P7.62 17222 points / square meter
P8 15625 points / square meter
P10 10000 points / square meter
Pixel diameter and number of pixels of the outdoor screen
P10 10000 points / square meter
P12.5 6400 points / square meter
P16 3906 points / square meter
P20 2500 points / square meter
P25 1600 points / square meter
P31.25 1024 points / square meter
(5) According to the display performance can be divided into
Video display: generally full color display
Text display: generally single color display
Graphic display: generally dual-color display
Market display: generally digital tube or single primary color display;
(6) According to the display device can be divided into
LED digital display: The display device is a 7-segment digital tube, which is suitable for making clock screens, interest rate screens, etc., and displaying digital electronic displays.
LED dot matrix graphic display: The display device is a dot matrix display module composed of a plurality of uniformly arranged light emitting diodes, and is suitable for playing text and image information.
LED video display: The display device is composed of many light-emitting diodes, which can display various video files such as video and animation.
Conventional LED display: The display is fixed in one position with a steel structure. The main common ones are outdoor large single-column LED advertising screens, as well as single and double-color led displays installed on the wall for playing the train information.
Rental LED display: At the time of design, the R&D department considers that the screen is often used for installation and disassembly. Therefore, the left and right cabinets are fast-locked with positioning function, and the positioning is accurate. The entire cabinet is installed within 10 seconds. . Rental screens are mainly used for stage performances, wedding venues and large spring festivals.
(7) According to the direction of development can be divided into
The "advertising media display" that has been widely used: the single-and-two-color display screen of the door and the full-color display on the surface of the square building are mainly for advertising;
"Industrial indicator display" that is quietly rising: for PLC\DCS and other distributed control systems, with auxiliary display, such as display speed, flow, temperature, pressure, etc.;
