Some LED display manufacturers use "virtual pixel" technology. They claim that "virtual pixel" doubles the actual resolution of screen, i.e., a screen with a physical (true) resolution of 320x240 pixels in reality is expressed as the "virtual" resolution of 640x480. In a “Virtual Pixel” Display in an attempt to smooth out digital image, each pixel of the image corresponds not to an actual module pixel but to a light/data source, that is part of the group of pixels that form the “Virtual pixel”. By this mode of pixel sharing one pixel contains the “Virtual group”* of pixels image information. *(The 2 or 4 pixels that are combined to form the “Virtual” effect). Virtual pixels are also known as “pixel sharing” or “dynamic pixels”. Some claim that with “virtual pixels” the displayed image has twice the resolution as the “physical” resolution. This is not true, since one module pixel cannot memorize or hold and display the majority of information from the initial pixel. The majority of the original information vanishes. This results in distortion of important details and other elements such as colors that are part of the initial image.
In the actual, physical or true pixel technology, the image is displayed on a display in as each pixel of the original image corresponds to pixel on a screen. It takes the actual color in a pixel as it is balanced in brightness and contrast and no additional corrections are required. Optec Digital Billboards only uses true pixel technology.
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