ڵ鿡 ϸ ΰ 0 ~ 4,000Ʈ ϰ 鸸 1 ̸ ν ִٰ մϴ. , ʿ ϰ Ǹ, ̸ ϴ ̳ (High Dynamic Range, HDR) Դϴ. , ȭ ο , κ ϰ ְ, ο κ Ӱ ǥϵ 繰 Ƿϰ ̵ ϴ ̹ ǥ .
ɰ Ư ǹ, >>
(aperture ratio) ȭҿ ִ κ Դϴ. κ ַ TFT ȸ Դϴ. ¿ Ⱑ ϰų Һ մϴ. ȿ , Ư OLED ȭ ̴ ÷̿ 忡 ſ ߿. ߱ OLED , TFT κ ĸ ߱ OLEDٴ ֽϴ.
ΰ OLED ߱ ϰ , TV OLED ػ , ȭ ũ Ұ ߿ ̽ Ǹ , Ȯ Ͽ ߱ ְ. OLED 쿡 Դϴ. ٸ, RGB OLED , RGB ȭҵ 谡 ġ ϱ Ͽ ʿ ̻ ΰ ־ 50% Ͽ ӹ , ũ ̳ Ͽ ߱ (deadzone) ̴ ߿մϴ.
ɰ Ư ǹ, ̳ HDR >>
÷ ȭ ̴ 5 Ұ ֽϴ. ̹ Բ ɵ, ӵ, ػ, ̳ Դϴ. , ǥ ִ Ÿ, , ڿ ˴ϴ. ɵ ȭҰ ǥ ִ ⸦ ȭ Ű ̸, ȭҰ ǥ ִ ȭ մϴ. ӵ 1ʿ ǥõ ִ Դϴ. ӵ Ҽ ε巯. ػ ȭ ȭ Դϴ. ũ ȭ鿡 ȭ , , ػ Ҽ ̹ Ͽϴ. ̳ (dynamic range) ο κа κ , ǥϴ ν, , ȭ Ư 谡 ֽϴ.
TV ϴ , 20 ǥ ǥ ̳ (Standard Dynamic Range, SDR)̾. ̴ 0 ~ 100Ʈ(nit) ǥ° 8 Ʈ(bit) ǥ 1,600 ǥ ֽϴ. ̴ ΰ ν ִ ϰ ġ . ڵ鿡 ϸ ΰ 0 ~ 4,000Ʈ ϰ 鸸 1 ̸ ν ִٰ մϴ. , ʿ ϰ Ǹ, ̸ ϴ ̳ (High Dynamic Range, HDR) Դϴ. , ȭ ο , κ ϰ ְ, ο κ Ӱ ǥϵ 繰 Ƿϰ ̵ ϴ ̹ ǥ .
HDR ÷, Ұ մϴ. Ϲ HDR ī Կ . ̴ Ϲ ī ־ ȿ ̰ 쿡 ְ ʴ , ֽϴ. HDR ȿ ÷, , ֵ ߰, ۾ ̷ϴ. ÷̿ ͵ ȭ鿡 ݿ˴ϴ. HDR ݿ ٸ ÷̿ ְ ȭ ֵ ӵ ó Ծ ְ, ÷̿ Ծ HDR ȿ ùٷ ϴµ, ̷ (tone mapping)̶ մϴ. HDR ǥϱ ؼ ÷̿ ̸ ǥ ִ ʿϸ, ̸ ÷̰ õǾϴ.
ǥ HDR ‘HDR10’ ‘ (Dolby Vision)’Դϴ. HDR10 1õƮ 10Ʈ( 10 ) ɵ Ͽ, 1 Ʈ 12Ʈ( 68 ) ɵ ϰ ֽϴ. ػ Բ HDR ǥ± 鼭, ڿ ȭ ְ , HDR TVӸ ƴ϶ ä ǰ ֽϴ. ÷ ÿ HDR 渮 ȭ ߽ ۵ǰ , HDR Ͽ پϰ Դϴ.
ɰ Ư ǹ, Ϻ >>
Ϻ(contrast ratio), Ȥ ÷̰ ǥϴ ִ ֵ ּ ֵ Դϴ. ÷ Ϻ 10,000:1̶, ִ ֵ ּ ֵ 1 Դϴ. ο ִ 10,000 ܰ ִٴ ǹ̷, Ϻ ȭ ֽϴ. Ϻ ߿ ϴ ΰ ⸦ ϱ Դϴ. , ο .
Ϻ ǥ ִµ, ̴ LCD , ο ȭ鿡 Ʈ ⸦ ο κ Ȯ ְ ϰ, ȭ鿡 Ʈ ⸦ κ ִ Դϴ. , ƴ 鿡 ο ֵ ϴ Ϻ ū ϴ.
ɰ Ư ǹ, ɵ , >>
÷̴ ȭƮ 2, Ȥ ⸦ ȭѰ ̸ ǥϰ, ̳ʰ ϴ ÷̴ ʾ ǥϱ մϴ. ÷̰ ǥ ִ Ÿ ġ ɵ(color depth), ̸, ǥ δ Ʈ(bit) մϴ. Ϲ ɵ ÷̴ ڿ ϰ, ɵ ÷ϼ ȭ پϰ ڿ ǥ ֽϴ. ɵ Ʈ ڽϴ.
⺻ Ʈ 0 1 ̷ Դϴ. Ϲ 0 (off), 1 (on) . TV , ȭҸ ǥ 0, 1̶ ϸ ÷̴ ȭҸ , 2 . Ʈ 2 ̹Ƿ 2 Ʈ ϸ ˴ϴ. , ‘2 1 = 2’̹Ƿ ǥ ִٴ ̸, TV ɵ 1Ʈ ÷Դϴ.
̹ ÷ TV غ. ÷ TV Ϲ R, G, B, 3 ȭҷ ΰ ̵ ǥմϴ. Ƿ ⺻δ R 1, 0 2 ɼ ִٸ G B 2 ɼ ֽϴ. ̷ Ǹ ‘2 3 = 8’ Ǹ鼭 8 . ȭ Ʈδ 1Ʈ̸, ȭ Ʈδ 3Ʈ Ǵ Դϴ. ̶ ǥǴ 2 غ ȭ R=1(), G=0(), B=0() , ȼ ˴ϴ. R=1, G=1, B=1 Ͼ ǰ, R=1, G=1, B=0 R G ˴ϴ. ȭҸ 0 ǰ. ܼ 쿡 ȭҴ 3Ʈ, 8 θ ǥϰ, ȭҵ 鸶 ܰ ‘£’ ‘’ ֽϴ. ̸ (gradation) մϴ. ‘’ ǹ̷ ‘̹ £ κп ܰ’ε, ϸ ο(£) κа () κ ǥϴ ǹմϴ. , Ŭ ǥ Ƿ ڿ ǥ˴ϴ. 3 ȭҵ, RGB 3 3Ʈ ɵ ϸ, ‘2 3 = 8’ ǰ, ȭҰ ǥ ִ ‘2 3 x 2 3 x ‘ 3 = 2 9 = 512’ ˴ϴ. ȭ ɵ 8 쿡 ȭ 256 ǰ, ȭҰ ִ 16,777,216 . , ȭҰ ִ ‘2 R Ʈ x 2 G Ʈ x 2 B Ʈ ’ ˴ϴ. ǰ S ‘HDR10’ ɵ ȭ 10Ʈ, ‘ ’ ȭ 12Ʈ Դϴ. ̶, ‘HDR10’ 1,073,741,824, 10 ǥϰ, ‘ ’ 68,719,476,735, 68 ǥ ֽϴ. , κ TV, , Ʈ ÷̵ ȭ 8Ʈ, ȭ 24Ʈ ɵ , 256 1,677 ÷ ǥմϴ.
ɵ ϴ , , ⸦ ϴ ÷̸ ٸ ũԴ ̳ ȭ ȭ ⸦ ϸ, ̷ν . LCD ȭŰ鼭 ȭҵ ⸦ ϸ, OLED ȭ ⸦ մϴ. ̿ ȭҵ Ⱑ ǰ, ȭҵ Ǹ鼭 ÷ ȭ鿡 پ ǥ˴ϴ.
Բ ‘(gamma)’ ¤ Ѿ. ÷̿ ԷµǴ ȣ (gray level), ȭ Ÿ ֵ 踦 ϴ ġԴϴ. ȭ̶ ǥǴ ̰ ϴ. 1 Է° ֵ Ⱑ , 1 ũ , ȭ Ӱ ǥ ǰ, ݴ 1 ǥ ˴ϴ. 0 255 Ҽ ϴµ, 1̶ ֵ , ϴ. , ΰ ο ֵ ̴ ֵ п аϹǷ . ̸ ϱ Ͽ ΰ ȭ ʿϸ, NTSC ǥ 2.2 մϴ. ̴ , ȭ ֵ ȭ ֵ ȭ, - ֵ Ⱑ Ŀ Դϴ. , ϴ.
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“ ְ ظ ϰ , ο ڷ پϿ ǥ , ٶϴ.”
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