LED electronic screens are more and more widely used. When we purchase large LED screens, it is necessary to consider the dimensions, specifications, energy consumption, environment and other factors of the large LED screens. Here are how to choose LED electronic screens.
Screen size planning
When planning the screen size, there are three primary elements:
1. The need to display content
2. Space conditions
3. Electronic screen unit size or pixel size
The resolution of general LED electronic screen is generally 768 rows×1024 columns at most. Special electronic screens can exceed this limit, and the common method is to combine two screens; the other is to use ultra-high-speed chips to plan the circuit, but the cost is higher.
The size of the outer frame of the indoor electronic screen can be customized as required, and should generally be proportional to the size of the screen. The size of the outer frame is generally 4cm-10cm (each side).
Regarding outdoor screens, the pixel size must first be determined. The selection of pixel size should consider not only the display content requirements and space elements mentioned above, but also the installation orientation and viewing distance. If the installation position is farther from the main line of sight, the pixel scale should be larger. Because the larger the pixel scale, the more light-emitting tubes in the pixel, the higher the brightness, and the farther the useful line of sight is. However, the larger the pixel size, the lower the pixel resolution per unit area, and the less displayed content.
Power consumption and power request
The power consumption of the electronic screen is divided into uniform power consumption and maximum power consumption. Uniform power consumption is also called operating power consumption, which is the power consumption in practice. The maximum power consumption is the power consumption when starting up or in extreme conditions such as full light, and the maximum power consumption is an element that must be considered for AC power supply (wire diameter, switch, etc.). φ5 mm electronic screen power consumption:
Average power consumption: 200W/square meter; maximum power consumption: 450W/square meter φ3.75mm electronic screen power consumption = φ5 mm electronic screen power consumption × 2.5 times the electronic screen is a large-scale fine electronic equipment, for safe use and For reliable operation, the AC220V power input terminal or the AC220V power input terminal of the connected computer must be connected to the ground.
Note: The AC220V power input ground terminal of the computer has been connected to the computer case.
Questions that LED outdoor electronic screens must be extra thoughtful
The first questions for outdoor screens are as follows:
The electronic screen is installed outdoors, often exposed to the sun, rain, wind and dust, and the working environment is harsh. Electronic equipment getting wet or severely damp can cause short circuits and even fires, leading to failures, fires, and loss. Electronic screens may be subject to strong electric and strong magnetic shocks caused by lightning.
The ambient temperature changes greatly. When the electronic screen is in operation, a certain amount of heat will be generated. If the ambient temperature is too high and the heat dissipation is poor, the integrated circuit may not work properly or even be burned, making the display system unable to operate normally.
The audience is wide, the viewing distance is far, and the horizon is wide; the ambient light changes greatly, and it may be exposed to direct sunlight.
For the above special requests, it is necessary for outdoor electronic screens: the screen body and the joint between the screen body and the building must be strictly waterproof and leak-proof; the screen body must have an outstanding drainage method, and once the accumulation of water occurs, it can be discharged smoothly.
Install lightning protection equipment on electronic screens and buildings. The main body and shell of the electronic screen adhere to excellent grounding, and the grounding resistance is less than 3 ohms, so that the large current caused by lightning can be discharged in time.
Install ventilation equipment to cool down so that the internal temperature of the screen is between -10°C and 40°C. An axial fan is installed on the top of the back of the screen to dissipate heat.
Use industrial-grade integrated circuit chips whose operating temperature is between -40°C and 80°C to prevent the electronic screen from being unable to start due to the low temperature in winter.
In order to ensure long-distance visibility under intense ambient light conditions, it is necessary to use ultra-high brightness light-emitting diodes.
The display medium uses a new wide viewing angle tube, with a wide viewing angle, pure color, consistent and harmonious, and a life span of more than 100,000 hours. The outer packaging of the display medium is the most popular rectangular tube with a rim, sealed with silicone and no metallization installation; its appearance is exquisite and beautiful, sturdy and durable, with protection from direct sunlight, dust, water, high temperature, and short circuit Features of “Five Preventions”.