How were TV size ratios defined and why did we go from 4:3 to 16:9?
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One reason that wide screens became more prevalent was the ubiquitousness of LCD technology. In the days of CRTs, the electron beam had to be bent by a magnet to illuminate different parts of the screen. The further from the center, the more the beam had to be bent. This either caused a loss of image quality, created issues with hitting the pixel “masks/grids”, or required to tv to be physically larger (deeper). A widescreen tv would have to be just as large as a screen with the same width but more height, so it didn’t make sense for the screens to be wide. With LCDs, you can make a screen with pretty much any aspect ratio you want, and we prefer wide screens.
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