Why Do CRTs and LCDs Commonly Use a 4:3 Aspect Ratio?

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The discussion centers around the prevalence of the 4:3 aspect ratio in CRT and LCD displays, questioning its origins and scientific reasoning. It suggests that the 4:3 ratio in LCDs is a legacy of CRT technology, which in turn influenced the design of digital cameras. The conversation raises the point that early television creators could have opted for more aesthetically pleasing ratios, like the golden ratio or 3:2. Participants express curiosity about why the 4:3 ratio became the standard despite potential alternatives. The thread highlights a blend of historical influence and design choices in display technology.
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TV, Monitors ? So strange ...

Why is all the CRTs and LCDs in 4:3 ratio in their dimensions ?

Does it have any scientific reasons ??
 
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the LCD's has 4:3 ratio in dimensions because the CRTs has this ratio... and the digital camera(except highend DSLR) has 4:3 ratio because all computer monitor has this ratio... but i really have no idea why the CRTs has this ratio, ideally, I think the first person who make Television should use the golden ratio... or 3:2 (normal 35mm film size)...
 

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