Some small knowledge of led display|Indoor and outdoor led display|Curved display
LED is the abbreviation of light emitting diode, abbreviated as LED. LED display screen (LED panEL) is a display screen that is used to display text, text, graphics, images, animation, market information and other information, as well as television, video signals, and an array of LED devices through a certain control method. As a new generation of display media, it has been widely used in exhibition centers, trading centers, auction centers, financial centers, information centers, securities, telecommunications, taxation, power supply, customs, courts, firefighting, stations, airports, docks, talent markets, etc. Public places in the business hall. Display performance LED display screen is divided into text LED display screen, graphic LED display screen, computer video LED display screen, TV video LED display screen and market LED display screen according to display performance. Market LED displays generally include LED displays for securities, interest rates, futures and other purposes. Display color LED display screen is divided into single-color LED display (including pseudo-color LED display), dual-color LED display and full-color (three-color) LED display according to the display color. According to the gray scale, it can be divided into 16, 32, 64, 128, 256 gray scale LED display screens and so on. The three primary color screens are divided into full color, composed of red, yellow-green (wavelength 570nm), and blue; natural color, composed of red, pure green (wavelength 525nm), and blue. The basic luminous point outdoor LED display can be divided into Φ8mm (10000 dots/m 2), Φ12mm (3906 dots/m 2), Φ16mm (2500 dots/m 2), Φ26mm (1024 dots/m 2) according to the pixel diameter used ) Wait for the LED display. The market information LED display screen can be divided into 2.0cm(0.8inch), 2.5cm(1.0inch), 3.0cm(1.2inch), 4.6cmm(1.8inch), 5.8cm(2.3inch), 7.6cm (3inch) and other use environment LED displays are divided into indoor LED displays, semi-outdoor LED displays, and outdoor LED displays according to the use environment. Indoor screen area generally ranges from less than 1 square meter to more than ten square meters, with high dot density. It is used in non-direct sunlight or lighting environment, and the viewing distance is a few meters away. The screen does not have the ability to seal and waterproof. Semi-outdoor screen is located between outdoor and indoor. It has high luminous brightness and can be used outdoors in non-direct sunlight. The screen body is sealed to a certain extent, usually under the eaves or in the shop window. The outdoor screen area generally ranges from a few square meters to dozens or even hundreds of square meters. The dot density is relatively sparse (mostly 1000-10000 dots per square meter), and the luminous brightness is 3000-6000cd/square meter (different orientations and different brightness requirements), which can be used in sunlight When used under direct sunlight, the viewing distance is tens of meters away, and the screen has good wind and rain resistance and lightning protection capabilities. Installation method Built-in type, step type, hoisting type, wall-mounted type, front maintenance, hinge type. Synchronous and asynchronous synchronous methods mean that the working mode of the LED display is basically the same as that of a computer monitor. It maps the image on the computer monitor in real time with an update rate of at least 30 fields/sec, usually with multi-gray colors. The display ability can achieve the effect of multimedia advertising. Asynchronous mode means that the LED screen has the ability to store and automatically play. The edited text and non-grayscale pictures on the PC are transferred to the LED screen through the serial port or other network interface, and then the LED screen is automatically played offline, generally not too gray. The display capability is mainly used to display text information, and it can be connected to multiple screens. The main function of the capture card LED display is a special display medium, it can not directly receive computer data, it needs a series of transformations. The function of the capture card is to capture the display data of a high-speed computer (or multimedia display card), convert it, and transmit it to the main controller at down frequency.