LED display option to be careful what is the problem?

How to choose the applicable LED

LED display ads as a new carrier has become increasingly popular, more manufacturers have joined this industry in the past. This article describes how to choose the production of LED displays for LED problem.

Body in the design of screen size, there are three important factors:

(A) shows the contents of the needs of

(2) The venue space conditions

(3) The display unit module size (indoor display) or pixel size (outdoor display).

Ordinary LED display resolution of a general maximum of 480 rows × 768 Lie. Special display may exceed this limit, commonly used method is to use a combination of two screens; another is to use ultra-high-speed chip design the circuit, but the higher cost.

The following is a yin-screen design reference size:

φ3.0mm distance between two points is 4.00mm, the maximum size screen body is approximately: 2.0 m (H) × 3 Mi

φ3.75mm distance between two points is 4.75mm, the maximum size screen body is approximately: 2.5 m (H) × 4 Mi

φ5.0mm distance between two points is 7.62mm, the maximum size screen body is approximately: 3.7 m (high) × 6 Mi. Yin display in the design of geometric dimensions should be based on the size of display unit based on the template. Resolution of a unit module is generally 32 rows × 64 columns, a total of 2048 pixels, the geometric dimensions are as follows:

φ3.75mm unit module size: 152mm (high) × 304mm (W)

φ5mm unit module size: 244mm (high) × 487mm (W)

Indoor displays the size of the border in vitro can be ascertained, as required in general should be proportional to the size of the screen body. Outer border is usually the size of 5cm-10cm (each side).

For the outdoor screen, the first of all to determine the pixel size. Selection of pixel size should be considered apart from the aforementioned display space needs and space factors, should consider installing location and line of sight. If the installation location and the main line of sight farther, then the pixel size should be larger because the larger pixel size, pixel within the more light-emitting tube, the higher the brightness, and effective the more distant horizon. However, the larger pixel size, pixel resolution per unit area the lower the content displayed less.

Power consumption and power requirements

The screen is divided into the average power consumption and maximum power consumption. The average power consumption is usually known as the work of the actual power consumption. Maximum power consumption is a startup or extreme conditions such as full-light power consumption when maximum power is alternating current power supply (diameter, switches, etc.) must be considered elements.

φ5mm display Power Consumption:

Average power consumption: 200W / m2; Maximum power consumption: 450W / m2

φ3.75mm display power consumption = φ5mm display × 2.5-fold

Display is a large-scale precision electronic equipment, in order to safe use and reliable operation, its power supply input AC220V or its computer connected to the power input of AC220V to take the land.

Note: The computer's AC220V power input ground terminal has been connected with the computer chassis.

Outdoor screen issues requiring special consideration

(1) Outdoor display the main issues are as follows: screen installed in the outdoors, often sun-dried rain, wind and dust cover, poor working environment. Electronic equipment is wet or damp can cause serious short-circuit or even fire, cause failure or even fire losses.

(2) The screen may be caused by the strong electric magnetic thunderbolt attack.

(3) The ambient temperature changes significantly. Display work itself, we should have some heat, if the ambient temperature is too high and the heat also poorly integrated circuits may not work correctly, or even burned, making display system not work correctly.

(4) Shouzhong Mian wide and far-sight requirement, wide field of vision required; ambient light changes, in particular, may be subject to direct sunlight.

To deal with the special requirements of outdoor displays must be done:

(1) The screen body and screen combination of body and the Ministry of Construction must be strictly waterproof leakproof; screen body have a good drainage measures in the event of water can be discharged smoothly.

(2) on the screen and buildings to install lightning protection devices. Display main body and shell to maintain good grounding, grounding resistance of less than 3 ohms, so that large currents caused by lightning discharge in time.

(3) installation of ventilation equipment, cooling, so that screen the internal body temperature between -10 ℃ -40 ℃. Body behind the top of the screen to install axial fans, exhaust heat.

(4) The choice of working temperature -40 ℃ -80 ℃ industrial-grade between the integrated circuit chip, to prevent the winter the temperature is too low to display can not be started.

(5) In order to ensure that a strong case in the environment of remote visualization, you must use ultra-high-brightness light emitting diodes.

(6) shows the use of new media, wide angle tube, wide viewing angle, color pure, consistent coordination, life expectancy more than 100,000 hours. Shows the medium outside the package, currently the most popular cover along with a square cylinder, silicone seals, no metal-based assembly; its shape refined appearance, sturdy and durable, with anti-direct sunlight, dust-proof, waterproof, anti-heat, anti-Circuits short-circuit "Five Anti" feature.