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

Not millions of actual tiny separate wires, but effectively the same thing. The backplane of the display (the part that provides power and control) has millions of tiny conductive paths *printed* on it by very complex machines. It’s basically the same technology used to make microchips, just scaled way up.