How do near-black colors work on OLED screens?

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I’ve read that OLED displays work by turning off electricity for an individual pixel which is displaying pure black, eliminating the backlight and displaying the deepest black possible. My question is, as soon as you have something that’s almost black, but not *pure* black (like `rgb(1,1,1)`), does the depth of the black go back to being just as good/bad as a regular LED screen? If not, then how?

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Anonymous 0 Comments

each OLED element emits light separately, which is different from the prevalent non-emmitting LCD displays which merely filter a backlight. so in the case of LCD (now with gridded LED backlights), turning off a portion of the backlight will have this effect you are mentioning, a noticable gap in luminosity from the *almost* black with the LCD value attempting to block all of the backlight, to `rgb(0,0,0)` with the backlight off.

but since the OLED elements are the emitters, themselves, they are tuned in manufacturing such that a value of `1` is just barely emitting and is as close to indistinguishable from `0` as their gradient allows.

so to sum it up, local dimming/disabling of a coarse grid of LED backlights (in LED backlit LCD displays) will not have the same effect as individually dimming each emitter independently (in OLED displays).

Anonymous 0 Comments

OLEDs don’t have a backlight. That’s what makes them better than LED.

You’re describing local dimming with full array backlit LED’s

Anonymous 0 Comments

OLED pixels only produce as much light as they need. black produces no light so it uses no electricity. dark grey produces a little bit of light, so it uses a little bit of electricity

OLED power use can be approximated with a simple calculation. take each pixel’s RGB values, translate them to luminance, and add them together (in reality each subpixel has a different efficiency rating you have to factor in. green at 100% brightness doesn’t use the same amount of electricity as red at 100% brightness). the result: OLED uses less electricity for a lot of content, even if it’s colorful. but it uses more for things like websites that are mostly white background