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Mini-LED分区背光提升HDR对比度，但分区数量不足（几百区）会产生光晕（halo），影响暗部色彩精度；调色暗场景需求高的选OLED，明亮环境+高亮度需求选Mini-LED

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Unverified峰值亮度越高HDR越出彩，但廉价Mini-LED分区少会导致高亮场景出现光晕（黑底白字周围发光），亮度与控光需平衡看87% similar UnverifiedMini-LED分区数决定HDR暗部控制，27寸4K建议≥1000个调光分区，分区少于500会出现明显光晕(blooming)，白字黑底场景边缘发灰87% similar UnverifiedMini LED靠分区背光提升峰值亮度（可达1500-4000nit），明亮客厅HDR效果更好，但分区数不足时亮暗边界会出现光晕(halo)，选购看分区数量：75寸建议≥500分区85% similar Unverified分区调光数量决定画质层次：入门Mini LED仅几十个分区，中高端可达500-1000+分区，分区越多越能避免亮暗交界处的光晕（Halo效应）82% similar UnverifiedOLED对比度无限但持续全屏亮度低(约250nit)，Mini-LED持续全屏亮度高(600nit+)但对比度和黑位不及OLED，暗室看片选OLED，亮环境/高亮需求选Mini-LED80% similar

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