OLED achieves true black, LCD cannot
Question asked:
“OLED displays can achieve true black by turning off individual pixels, while LCD displays cannot achieve true black because their black pixels still emit light.”
Summary
OLED panels can produce true black because each pixel can be switched off completely, eliminating any light emission. LCD panels rely on a backlight that remains on even for black images, so their black levels always retain some light leakage and cannot reach absolute black.
Sources 58 searched
- Why Even OLED Doesn't Give You Perfect Black: The Eigengrau Effect — MediaLight Bias Lighting
Even though OLED displays can achieve "perfect" black by turning off individual pixels, your experience of that black will always be filtered through the lens of eigengrau.
- Does OLED Have Deeper Black Than Other Displays? - OLED/LCD Supplier
OLED displays do have deeper black levels than traditional LCDs because each pixel emits its own light and can turn off completely, producing true black with no light bleed.
- Why OLED Panels Can Display True Black But Still Show Near-Black Crush
OLED can hit true black because each pixel can shut off completely.
- The OLED Black Depth Lie - When Panel Type and Coating Matters - TFTCentral
A full black screen test pattern was displayed and across a large number of measurements, a black depth was measured. Using that along with the relevant brightness measurement we can also calculate the contrast ratio.
- OLED vs LCD Display Module | Differences and Selection Guide
Contrast Ratio: OLED static contrast easily exceeds 1,000,000:1; whereas top-tier Mini-LED backlit LCDs might achieve a real static contrast ratio of 20,000:1 to 100,000:1, still a difference of orders of magnitude.
- Our Monitor Picture Quality Tests: Contrast - RTINGS.com
With LCD monitors, both white and ... the ratio. With OLED monitors, adjusting the brightness only increases the peak brightness; blacks are still perfectly black, and the contrast ratio remains Inf:1....
- Do LG OLED's shut off completely (absolute black)? | AVS Forum
Blacks may "appear" deeper on the Sony OLED because they may be using a better A/R filter. ... That Only can be true in a very bright enviroment.
- Is there actually a movie with "true black"? | AVS Forum
Absolute black does not exist in nature. Unless the entire image is completely black. Like in a cave with no lights. At which point any LCD could display the image as accurately as an OLED. Or a TV turned off.
- The OLED Black Depth Lie – When Panel Type and Coating Matters | The FPS Review Forums
QD OLED (Smasung) though - it can look better than VA under low light levels, but it quickly gets worse as light levels increase. At moderate light it's no better than average and under bright light it can actually look worse than most IPS.
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