Nowadays, our mode of consumption is constantly oriented towards the search for the best value for money. This is quite easy in the choice of our daily products that we know and for which we have consumption habits. However, for products like giant LED screens, it is more complicated to assess their quality. Indeed, in general, you are less familiar with these technologies and that is quite normal. Fortunately, expert articles are here to help.
In this article, we are going to come back to 7 important characteristics to take into account when evaluating the quality of a giant LED screen. This information will allow you to compare the proposals made by different suppliers and manufacturers. However, each project is unique, and depending on the need the best level of quality will not always be necessary.
THE LIGHT LEVEL
Brightness is one of the major advantages of SMD Screens. Indeed, it is the dynamic display solution that offers the most brightness and is visible in all weathers.
This is why this information will be very important, especially in the context of outdoor screens. Indoors, it is estimated that the brightness of a screen should be at least around 800 cd/m². In the window, this must be at least 1000 cd/m² if the window is poorly exposed and 3500 if the environment is very bright.
Finally, outdoors, this value will have to rise above 5,000 cd/m² to be visible in broad daylight. Too low a brightness, on the other hand, will result in an image that is less clear or even difficult to see.
THE VISIBILITY ANGLE
The angle of visibility is much less discussed and just as important information. As its name suggests, it determines the dimension beyond the perpendicular of the screen where the image will remain visible without distortion.
This data is of interest concerning the location where the targeted audience will be, depending on whether or not they are on the move. The viewing angle varies from screen to screen. Indeed, this depends on the way the LEDs are made and integrated into the screen.
THE REFRESH RATE
The refresh rate of an LED screen represents the number of new image displays displayed by the screen in one second. It is expressed in Hz. A human eye requires at least a refresh rate of 300 Hz to view a moving image. A high refresh rate provides a more fluid feel, which is important for streaming video.
However, this is not the only interest of the refresh rate. Indeed, a high rate will have a positive impact on the brightness and colorimetry of the screen.
Finally, the refresh rate is essential information for screens that are to be filmed during events, or in stadiums for example. Indeed, a high refresh level will allow you to have a clear image of the screen and not to see its scan during recording.
THE LEVEL OF CONTRAST AND COLORIMETRY
The notion of contrast refers to the difference in intensity between the brightest and darkest points. The greater the nuances between bright “white” and dark “black”, the higher the level of contrast.
A high level of contrast greatly improves the rendering of the image displayed on the screen and will make it possible to obtain a rendering closer to reality. The colors will be more vivid and the screen will therefore attract more attention. Conversely, a low level of contrast will result in a duller image with a greyish effect.
Linked to this notion of contrast, we find information related to the colorimetry of the screen. First, is the white balance, that is, the ability of an LED screen to display pure white. Indeed, if there is an offset of this value, it will affect all the other colors.
This is why when we look at a screen, we can have a feeling of more yellow or more blue color. Added to this is the screen’s ability to faithfully reproduce the colors of the source file relative to its wavelength. Like the white balance, the screen must therefore be able to display red, green, and blue tones without distortion.
