How to choose the right LED screen?

If you base your decision on the following recommendations, you can be guaranteed that your decision will be correct. The specific model of the LED screen you purchase should primarily be determined by the location of its installation and the conditions of its review. This section will equip you with an in-depth knowledge of LED screens so you can easily discuss your options with others.

1. Screen size and location

The process of choosing your LED screen size is extremely important. The model you chose won’t just determine the cost of the entire project but also the prospect of selling advertising time on the screen. If you install for example a 3×4 meters LED screen for a viewing distance of 400 to 600 meters, approximately 200 to 300 meters of effective viewing will simply be lost. Additional recommendations for determining the parameters and linear dimensions of the video screen can be found in the section of our website called “Effective Viewing Distance”

2. Type of content displayed on the screen

Determining the type of media and information displayed on your LED screen will allow the manufacturer and supplier to assess the necessary steps between the pixels of the LED screen and its characteristics. When you plan the budget for a LED screen you need to consider the content displayed on the screen or your purchase might prove to be disastrous.

3. Pixel pitch of the LED screen

The choice of the pixel pitch and the LED screen resolution dictates the physical limitations of the screen size, viewing distance, viewing angles, and of course, the budget. The cost of the screen is determined by its resolution and area. In order to produce high-quality videos on a large screen, you need to purchase the screen with the highest resolution possible under your budget. The screen resolution is defined as the total number of vertical and horizontal pixels.

4. Brightness and viewing angles

The unit of measurement of the brightness of the LED screen is nit (cd/m2). The higher the value, the higher the brightness of the screen. The brightness for indoor screens should be no more than 1,500 – 2,500 nits. For outdoor screens, the brightness should range from 3,500 nits (for screens without direct exposure to the sun) up to 10,000 nits (when the screen is directly exposed to the sun). Brightness is measured at a normal angle to the screen.

The viewing angle is usually determined by the point where the screen’s brightness is 50% of the maximum. You should notice a change in brightness as you walk along the length of the screen. LED screens have a problem unique to this technology, called “shoulder obstruction”, i.e., when the color change occurs because one LED blocks another LED at critical viewing angles. Viewing angles should include color changes. If a significant color change occurs before the brightness drops to 50%, then that is considered as the viewing angle. The addition of visors between rows of LEDs reduces the illumination of the screen by other light sources, thereby increasing the contrast. This method also reduces the vertical viewing angle, but that is not usually a problem for most LED screen applications.

5. Minimum and maximum viewing distances

Minimum viewing distance can be calculated as pixel pitch x 750-1000. At this distance, a smooth image is observed. Closer inspection of the video will lead to a “decay” of the image into separate pixels. For example, for a LED screen with a pixel pitch of 10mm, the minimum viewing distance is 10mm x 1000 = 10m.

The formula to calculate the maximum viewing distance is generally Screen Height x 20-30. For example, for a LED screen with a height of 4.56 meters, the distance will be 4.56m x 30 = 137m.

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