LED Display’s Working Principle

led display screen is a High-tech products that optical and computer technology in one.

LED product’s performance characteristics

led video display should have: animation features. Required LED display’s dots corresponding to the same area showing of computer’s monitor, we can it dot to dot with controlling PC. The function of text led display. Required text display stable, clear crosstalk; grayscale function. it Requires a detailed specification in the levels specified in gray. TV led video display except with animation, text display, grayscale functions, should be able to show the TV, s-videos,dvd players. rental led display aslo need the function to show the Live show,with hanging installation for different applications,and flight case for easy transportation.

Distance consideration and budget maximization

The minimum and maximum viewing distances of a LED Display screen are measured depending on two fundamental characteristics of the screen – Pixel Pitch and Screen’s dimension:

Minimum viewing distance based on Pixel Pitch:

•the minimum distance is calculated converting into meters the pixel pitch. For example, a LED maxi screen with 10mm pitch has a minimum viewing distance of 10 meters, while a 20mm pitch screen has a minimum viewing distance of 20 meters.

Maximum viewing distance based on screen’s dimension:

•the maximum distance instead, depends on the screen’s dimension and it can be calculated multiplying x10 and converting into meters the number of maxi-screen’s square meters. For example a 4×3 meters (=12sq) can be viewed from 120 meters distance.

Viewing distance is one of the most important factors needed to determine the correct size of most indoor led screen and outdoor led screen.

For TEXT displays:

As a general rule: 1 inch of text is viewable up to 50 feet away or 25mm of text is viewable up to 15m away. The following diagram illustrates at what distance and character size that a stationary audience will recognize and understand the content of an electronic sign.

Viewing distance chart for led electronic signs



What is Pitch and Resolution:

The pitch of a LED display defines the distance between the pixels, expressed in millimeters. This fundamental measure determines the characteristics and the performances of a LED maxi screens: the pitch indeed is a defining factor of a screen’s viewing distance:

•The smaller is the pitch, the shorter is the minimum viewing distance, the higher is the total number of pixels present on the LED screen (and therefore higher is the screen’s cost per area).

•The bigger is the pitch, the longer is the minimum viewing distance, the lower is the total number of pixels present on the screen (and therefore lower is the screen’s cost per area)

The pixel pitch therefore determines the LEDs density, which is usually called Resolution. It is important to notice that while reducing the pixel pitch, the LED density increase exponentially: for example, reducing the pitch by the 50% on the number of pixels grow of 4 times.