History and Evolution of Television Technology

The invention of television was pure genius.

Early TVs used a spinning disk to scan images, turning

light into electrical signals that could be transmitted.

But the quality was rough: only thirty lines of resolution and about

five frames per second, so the image looked blurry and jittery.

Still, it was the first time people could see

moving pictures from a distance.

Engineers later tried adding color by scanning images through red,

green, and blue filters, relying on your eyes to blend them

together.

But mechanical systems just couldn't handle it.

The real breakthrough came with CRT, or cathode ray

tube technology. It used an electron beam to sweep across

the screen, creating a much clearer and smoother picture.

For color, the image was split into red, green, and blue

signals controlled by three electron guns.

A key part called the shadow mask made sure each color landed

exactly where it should. Even more impressive, color information

was built into black-