为何有厂商后期不给手机DC调光?一加说出真相

孤城凉梦 2021-04-08 10:57:35
手机 dc 厂商 不给 后期


近年来,支持DC调光成为不少手机厂商的一大卖点,OPPO、小米、魅族等主流厂商早已跟进这项技术。

不知道大家有没有发现,前几年不少国产厂商吹得神乎其神的DC调光,现在声音逐渐弱了下去。有一部分厂商前期也就是初始版本里提供了DC调光开关,但升级后却不再支持。为什么呢?

首先我们就要搞懂DC调光究竟是什么?此前中国移动官方对此进行了科普。

目前主流的PWM调光和DC调光都是调节屏幕亮度的一种方式。

PWM调光是通过屏幕的亮、灭交替来改变屏幕亮度。为什么调屏幕亮度的时候,手机是一直亮着的呢?那是因为亮、灭交替的足够快,超出人眼感知的范围。灭屏状态持续时间越长,屏幕亮度越低;相反,亮屏时间越长,屏幕就会变亮,也就是大家常说的频闪。

但不同人的眼睛对于屏幕交替亮灭的敏感度不同,有人比较敏感,遇到低频PMW调光的屏幕,就会出现眼睛不适的情况,严重可能会头晕、恶心。

DC调光是通过提高或降低电路功率来改变屏幕亮度,功率=电压x电流,所以改变电压或电流都改变屏幕亮度,调光过程比较柔和。


?为何有厂商后期不给手机DC调光?一加说出真相

回到最初的问题,为何有的手机厂商原本推出了DC调光方案,但后期却不给DC调光了?

比如,三星手机也曾用过DC调光,但毫无意外地翻了车,直到今天三星手机依然不使用DC调光(用户通过刷第三方ROM实现DC调光支持的除外)。

对此,一加科技张璇(微博ID:酸数码)今日解释,DC打开后给厂商的屏幕售后和品质口碑带来了不少新问题,这是现在厂商又去除这个开关不再支持的重要原因。


?为何有厂商后期不给手机DC调光?一加说出真相

虽说DC调光还达不到可以保护视力,但可以缓解人眼长时间看手机产生的疲劳,对于那些对低频PWM调光方式比较敏感的用户更友好,不过这一方案并非100%完美,DC调光容易在低亮度下出现色彩不均的“抹布屏”现象,极低亮度下丢失动态范围并导致色彩均匀性变差。

不清楚的用户会以为这是屏幕问题。只能说目前DC调光还未达到完全理想的效果,抹布屏和色偏是难以跨过的坎儿,厂商不得不放弃,当然也需要各大厂商进一步努力完善这项技术。

手机的DC调光你来说重要吗?

(编辑:崔丽容)

版权声明
本文为[孤城凉梦]所创,转载请带上原文链接,感谢
https://www.seoxiehui.cn/article-313518-1.html

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