Why only OLED use direct light emission, and on the other hand we only have LCD-based manipulation of backlight? Why can’t we have small LED blubs for each pixel of screen?

Question

\* or have LED for each sub-pixel of screen.

In: 3

Answer 1

If you use a light emitter for every pixel, you have an OLED or MicroLED. Other LED/LCD panels use a range of techniques from edge-lighting to full array local dimming (basically an array grid of lights behind the picture instead of lighting from the edge) to light the panel.

The biggest problem is cost, which is due to the difficulty of manufacturing the OLED and MicroLED panels.