In the design of screen size, there are three important factors:
(1) show that the content of the needs of
(2) the venue of space conditions
(3) display unit size template (indoor screen) or pixel size (outdoor screen)
General LED screen resolution up to the general line × 768 out of 480. Special display can be exceeded this limit, is commonly used to screen two with a combination; the other is to use ultra-high-speed circuit chip design, but higher costs.
The following is a reference to the interior design of the screen size:
φ3.0mm the distance between points is 4.00 mm, the largest screen-size is about: 2.0 meters (high) × 3 meters
φ3.75mm the distance between points is 4.75 mm, the largest screen-size is about: 2.5 meters (high) × 4 meters
φ5.0mm the distance between points is 7.62 mm, the largest screen-size is about: 3.7 meters (high) × 6 meters
In the interior design of the screen geometry, the display unit should be based on the size of the template. A unit template for the resolution of the general 32-line × 64 columns, that is, a total of 2048 pixels, and its geometry is as follows:
φ3.75mm unit template size: 152 mm (high) × 304 mm (width)
φ5 mm size template for the unit: 244 mm (high) × 487 mm (width)
Indoor display in vitro border may be asked to determine the size, and in general should be proportional to screen size. Outside the frame size is usually 5cm-10cm (each).
For outdoor screen, first of all to determine the pixel size. Selection of the pixel size should be considered in addition to the above-mentioned contents of the display space and the needs of the space factors, should also be given to the installation and line-of-sight location. If the installation location and the main line-of-sight distance, the greater the pixel size should be, because the bigger the pixel size, pixel within the LED more, the higher the brightness, and effective line of sight is also much more. However, the greater the pixel size, per unit area of the lower-pixel resolution, shows that the content will also decrease.
And power consumption requirements
The screen is divided into the average power consumption and maximum power. The average power consumption is also known as the normal work of the actual power consumption. Power consumption is the largest start-up or full-time extreme cases, such as power consumption, power consumption is the largest AC power supply (diameter, switches, etc.) must take into account the elements.
Φ5 mm display power consumption:
The average power consumption: 200W / m; the largest power: 450W / m
φ3.75mm power display = φ5 mm display power consumption × 2.5-fold
Is a large-scale display of precision electronic equipment, in order to use the security and reliability, its power AC220V input or computer connected to the power supply AC220V input must take the land.
Note: The computer's power supply AC220V input-side ground has been linked with the computer chassis.

Outdoor screen in particular need to consider
Outdoor screen the main issues are as follows:
(1) screen installed outdoors, often weather, wind and dust cover, bad working conditions. Electronic equipment was wet or damp serious cause of the fire even short-circuit caused the fire or even failure, resulting in the loss.
(2) screen may be caused by lightning strong magnetic power attack.
(3) significant changes in ambient temperature. Display their work when it is necessary to have a certain amount of heat, if the ambient temperature is too high heat and bad, integrated circuits may not work properly, or even destroyed, so that the display system can not function properly.
(4) a wide audience, far from line-of-sight requirements, require wide field of vision; changes in ambient light, in particular, may be subject to direct sunlight.
To deal with the special requirements of the outdoor display must be:
(1) screen-and-screen combination with the construction of the Department must be strictly leak-proof water-proof;-screen in order to provide good drainage, stagnant water in the event of a successful emissions.
(2) display in the building and install lightning protection devices. The main display case and maintain a good grounding, grounding resistance is less than 3 ohms, so that the lightning caused by the large current discharge in a timely manner.
(3) the installation of ventilation cooling, so that the internal body temperature in the screen -10 ℃ ~ 40 ℃ between. -Screen installed behind the top of the axial flow fan, exhaust heat.
(4) in the selection of operating temperature -40 ℃ ~ 80 ℃ between the industrial IC chip to prevent the winter temperature is too low so that the display could not be activated.
(5) In order to ensure the environment in the light of the strong long-range video, to be selected ultra-high-brightness light-emitting diodes.
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