How is each individual pixel controlled on a 4K display with millions of pixels?

Question

I understand that for both LCD and OLED, different voltages are applied to get the diode to react differently and emit different colors and brightness levels. But how do they control each of these millions of pixels simultaneously? Are there literally millions of tiny copper wires going to each pixel?

In: Engineering

Answer 1

I’m not sure about home TV devices, but the really large wall sized LED screens have individual controllers for sections of the TV. One controller might control a 10 foot by 10 foot sections for example not the entire screen.

I would image that there might be even smaller individual controllers hidden inside the screen to subdivide the work so that you don’t have to run “wires” from each pixel to each controller. I do not know how they divide the work, but it seems like it would be more practical..