Unverified85% confidenceDecision RuleTime unknown
给儿童选购须认准类DC调光或DC调光屏，PWM低频调光（<1250Hz）频闪对儿童视觉疲劳影响更大；查看参数中的调光频率，2160Hz以上高频PWM或DC调光更护眼
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85%
Confidence
Long-term
Relevance
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UnverifiedPWM调光频率≥1920Hz或采用类DC调光才算真正护眼，低于360Hz的低频PWM长时间使用易导致眼疲劳；对频闪敏感人群应认准全程DC调光或高频PWM≥2160Hz机型85% similarUnverified夜灯必须采用无频闪或高频驱动电源（>3000Hz），劣质PWM调光在低亮度档位频闪明显，长期使用易造成儿童视疲劳；优先选择DC恒流调光产品84% similarUnverified关注PWM调光频率，低于1250Hz的低亮度调光会产生频闪，长时间使用易疲劳；优选宣称高频PWM（>3000Hz）或DC直流调光的产品，儿童房和书房尤其重要84% similarUnverified选择DC调光（直流恒流）而非PWM低频调光的夜灯，低频PWM调光在低亮度下频闪明显，长期对婴儿视觉发育不利，认准标注'无频闪'或'DC调光'82% similarUnverifiedPWM调光频率＜1250Hz的OLED屏对敏感人群可能引发眼疲劳，选购护眼需认准≥1920Hz高频PWM或类DC调光，2160Hz以上为第一梯队82% similar
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