Outdoor LED displays are a popular medium for carrying commercial advertisements and various types of information for the public. They provide high visibility and can be used in buildings, stacks, shop windows, etc. They can be easily fixed to different types of structures such as
Indoor and outdoor displays: The required screen brightness for indoor environments is medium. This type of screen has a wide viewing angle as it will be seen up close. They are also lightweight and have high density. For outdoor displays, the dot density is relatively sparse and the brightness requirements differ as viewing conditions vary during day and night. Also, these screens need to be seen from a much greater distance. Showcase, wind, rain, lightning, etc. must be able to withstand environmental conditions.
Semi-outdoor displays (placed in a mix of outdoor and indoor environments) have ultra-high brightness and can be used in direct, though not direct, sunlight. In this case, the screen body is sealed and is usually installed under the eaves of a building or in a window.
Displays consist of one color, two primary colors and three primary colors: Monochrome displays depend on the lighting material, the single most commonly used color is red, and in some special cases yellow and green. Dual primary color LED displays to consist of red and green LEDs. Displays with three primary colors offer red, blue and green LEDs. These can display white balance and 16,777,216 colors.
Synchronous and asynchronous displays: Synchronization is the operating mode of an LED display, similar to a computer monitor. It can display many grayscale colors, achieving the effect needed in multimedia advertising.
In the case of synchronization, an LED display can store and automatically play characters and non-grayscale images. Images are edited on the computer and transmitted to an LED display (automatically played) via a serial interface or other network interfaces. It generally cannot display many grayscale colors and is mostly used for displaying characters.