Local dimming is a way for LED TVs to improve an contrast ratio in night scenes by dimming zones of the backlight. This makes blacks appear deeper than they normally are without the feature.

LCD panels typically last longer than OLED displays, but OLED technology has made recent advances to increase longevity and reduce issues such as burn-in. LCD technology is more affordable and widely available, while OLED displays are more costly and found in high-end smartphones and premium television models.

QLED displays are more resistant to moisture than other display technologies, as quantum dots have a greater affinity for moisture. Thin and lightweight. It consumes less energy. QLED displays are 2 times more power-efficient than OLED displays, and they also have about a 30 to 40 percent increase in brightness . Γενικώς οι direct led θεωρητικά εχουν καλύτερη ομοιομορφία. Και λεω θεωρητικά γιατι υπάρχουν και edge που παιζουν καλύτερα και απο direct. Λογω πανελ, επεξεργαστή και πολλών άλλων παραγόντων.
LiquidB said: Some extra answers: 1. On reliability, the Side-LED TV's are performing worse: you need to make as much light as on a direct LED, but with fewer LED's. This means you need to use high-power LED's and drive them to the maximum. This means your average light output willl decrease over time.
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direct led and edge led difference