According to some studies carried out in 2020, we spend between 3 and 7 hours a day staring at the screen of a mobile phone. The reason is also that, over the years, the resolution of these devices, and the quality of the photos that can be taken, published on social networks (and watched by other users), have improved a lot. That is why one of the fundamental aspects on which producers wage war is precisely that of the beauty of the images that they can shoot.
For example, Find X3 Series, the new line of smartphones launched by Oppo on the Italian market on 11 March, offers a display with a resolution of 1440×3216 pixels and 1 front camera (the one for selfies) of 32 To give an idea of the enormous steps taken in relatively short time, the first smartphone of the contemporary era, launched on the market in 2007, iPhone, had only one camera, rear, 2 Megapixels, and a resolution of the For the time he seemed science fiction, today he makes smile. But what are the fundamental technological elements behind the development of the display and camera?
Resolution. The resolution of a telephone screen, as well as that of a television set, is measured precisely in pixels, those minimum units of the electronic image that we could compare to the marks of a dot frame: the more dots there are, the more sharp and recognizable the image Each of them manages the three primary colors (red, blue and green), and their different and combined ignition allows to form what we see, from letters to a landscape.
The image quality also depends on two other aspects, the technology used for display and density: in 2007 the iPhone used a LCD display, i.e. liquid crystals, which, placing a crystal above the light source, is darker for those who look at the image.
As for density, which indicates the number of pixels per inch, that is how many there are in a given area of the display ((1 square inch, equal to 6,45 square centimeters), between the phones today and yesterday there is a huge difference: Not to mention that we have moved from displays where pixels can show 256 shades for each primary color, thus reaching 16.7 million colors (256x256x256), to the most recent ones where pixels also light up with 1024
Camera. A similar speech can be made with regard to cameras that allow to fill the displays with images that can exploit the qualities of those screens, but go far beyond the constraints of those screens, resulting spectacular even on the larger monitor of a computer or when printed. Of course, the quality of the lens is crucial, as the resolution that the sensor is able to capture counts, measured in Megapixel (1 is equal to 1000×1000 pixels): yesterday there were 2, today precisely 50, with an exponential increase in the size of the
But the technology has been even more important in the development of the phone, and the possibility of mounting multiple lenses has been: the presence of 3 or 4 cameras allows to combine the characteristics, allowing the artificial intelligence on board the phone to create the best possible image by combining the capture sources with