苹果手表背后发绿光是怎么回事

很多人疑惑，为什么在使用苹果手表的时候，经常会遇到手表忽然发出绿色的闪光灯？今天我带你详细了解其中的原因。绿色闪光的官员主要是心率传感器发出的，那么这么多种颜色可以选择，为什么要使用绿色官员呢？ 主要原因是苹果手表普遍采用的是光电容积麦波波苗技法来获取心率数据的。听起来很高大上，实际上原理很简单。基于这种监测技术原理时， 血液是红色的，因为它可以反射出红光而吸收绿光。因此，苹果手表采用绿色 led 灯，搭配上感光光电二极光来检测任何时刻流经手腕血液的流量。 当用户的心脏跳动时，会有更多的血液流过用户的手腕，绿光的吸收量也会越大。在心脏跳动间隙，血液流量减少，导致绿光的 吸收量也会减少。通过每秒数百次的 led 灯，苹果可以计算出每分钟心跳跳的次数，也就是心率。如果你遇到过绿色灯亮起时间比平时多很多，这主要原因是心率传感器由于信号微弱，无法检测到你的血液，这个时候传感器的绿色灯会变亮， 持续增加闪烁速度，以进行监测信号的补偿。比如说表带的松动，或者手表处于手腕的某个位置，使得传感器没有尽可能的接触到皮肤等，就会发生绿色传感器抑制工作的情况。 但是你也可能会注意到，尽管苹果手表一整天都在记录心率，但绿色 led 传感器检测几乎不会被启用。这主要原因是苹果提供了第二种使用红外传感器来测量心率的方法，他们比使用绿色 led 灯光检测更节省电池。默认情况下是每隔十分钟左右， 苹果红外传感器会自动监测心率一次，虽然节能，但问题在于它的准确率相对比较低。因此，如果健康监测程序发现你的传感器收集数据存在问题时，手表又会自动切换到绿色传感器进行再次监测。 以上就是苹果手表为什么会经常亮起闪烁绿色灯光的全部原因，欢迎点赞关注我们，谢谢，拜拜！

当我们使用 apple 的时候，我们可能会发现手表背面时而冒出绿光，他其实在测量我们的心率。他的原理其实很简单， 血液呈现红色的原因是因为他反射红光并吸收绿光。 apple 我成好的利用到了这一点。 他使用绿色 led 灯和关电二极管按检测某个时间点手腕的血流量。当我们心脏跳动的时候，手腕的血流量会增加， 被吸收的绿光也会增加。在两次心跳之间吸收的绿光会减少。 led 灯每秒会进行数百次的闪烁，这样来计算出我们的心率。

while wearing an apple watch you may notice that it suddenly glows green it's caused by the optical heart sensor which measures your heart rate but why green well， it's because of a technology called photoplathismography and while that may sound complicated the concept is fairly simple blood appears red since it reflects red light and absorbs green light the heart sensor takes advantage of this by using green led lights along with light sensitive photo diode sensors to measure the amount of blood flowing through your wrist when your heart beats the blood flow in your wrist and the green light absorption is greater between beats it's less and the green led light doesn't actually glow it flashes hundreds of times per second at that speed our eyes can't discern individual flashes and the light simply appears to be a solid， but each flash of the led serves as a snapshot of your blood flow put hundreds of these snapshots together and the apple watch can figure out when your heart is beating and calculate your heart rate but if you've ever felt like the green light was way brighter than usual there's a reason for that too if the heart sensor can't detect your blood flow due to a weak signal it's designed to brighten the green light and increase the flashing speed to compensate making the glow more noticeable than usual it typically happens if you're wearing a looser band or if your wrist is in a certain position that prevents the watch from making contact with your skin now， you may have noticed that the green light isn't on constantly despite the apple watch recording your heart rate throughout the entire day that's because apple included a second way to measure your heart rate using infrared sensors use much less battery than the green leds and are designed to take measurements in the background every ten minutes the problem is they're not as accurate so if the watch detects an issue with the infrared sensors accuracy it'll switch to the green sensor instead this is greg with apple explained thanks for watching till the end and i'll see you in the next video。

和系统表盘一样， clout 也是支持显示心率数据的。不同的是，系统表盘是间隔若干分钟测一次，而后显示最近的一次数据。 clout 则是可以一直实时显示。当然，一直开着硬件通常是要比软件更为耗电的，因此，今天是来教你们如何关闭心率显示的。 除了通过健康 app 控制，还有一种更彻底的方法，我们只需要找到对应的表盘，进入编辑，找到心率数据的图层并直接隐藏，然后再同步到手表， 他就不会一直显示了， 手表也不会再一直冒绿光了。点关注不迷路。

while wearing an apple watch you may notice that it suddenly glows green it's caused by the optical heart sensor which measures your heart rate but why green well， it's because of a technology called photoplithus mography and while that may sound complicated the concept is fairly simple blood appears red since it reflects red light and absorbs green light the heart sensor takes advantage of this by using green led lights along with light sensitive photo diode sensors to measure the amount of blood flowing through your wrist when your heart beats the blood flow in your wrist and the green light absorption is greater between beats it's less and the green led light doesn't actually glow it flashes hundreds of times per second at that speed our eyes can't discern individual flashes and the light simply appears to be a solid green but each flash of the led serves as a snapshot of your blood flow put hundreds of these snapshots together and the apple watch can figure out when your heart is beating and calculate your heart rate but if you've ever felt like the green light was way brighter than usual there's a reason for that too if the heart sensor can't detect your blood flow due to a weak signal it's designed to brighten the green light and increase the flashing speed to compensate making the glow more noticeable than usual this typically happens if you're wearing a looser band or if your wrist is in a certain position that prevents the watch from making contact with your skin now， you may have noticed that the green light isn't on constantly despite the apple watch recording your heart rate throughout the entire day that's because apple included a second way to measure your heart rate using infrared sensors these use much less battery than the green leds and are designed to take measurements in the background every ten minutes the problem is they're not as accurate so if the watch detects an issue with the infrared sensors accuracy it'll switch to the green sensor instead this is greg with apple explained thanks for watching till the end and i'll see you in the next video。

这是一个指尖薛洋溢，这是一个苹果手表，苹果手表在测量炫耀浓度时用的是红黄， 但在测量新历史呢，用的是绿光，为什么呢？ 我们首先观察一个光学试验，这是一瓶水滴入几滴牛奶，用激光笔观察几种光学现象。首先看，这是光的吸收，光的反射，光的透射， 在黑暗情况下，可以看到瓶子整体都发红，这说明了瓶子中的水呢，对光发生了散射，这个现象又叫做丁达尔现象。这个图是关于光通过物体时反射、吸收和透射的示意图。接下来看几种 led 灯的颜色的光在手指中的透射和吸收现象。白光可以透射出红色光，红色光呢，吸收少，透射多，黄色、绿色、蓝色也是一样的，都是吸收多，透射少。 接下来看红色和绿色 led 灯的反射，可以看出红色光从手掌内部的反射呢，较强，但是呢，绿色的反射呢，比较弱， 这是涵养鲜红蛋白和不含氧鲜红蛋白对不同波长的光的吸收光谱。下图是可见光的光谱， 医用指甲修养仪是利用了红色光和红外光的透视来测量的，因此啊，数据较为准确。但是对于手表，手腕太粗，光不能透过通过手腕检测，因此 需要利用光的反射来检测。我们观看手表背面的各种灯，就知道这里用了较多的光电基建。 如何测量呢？根据绿色光、红色光和红外光对血管脉动血液的吸收光进行光的反射、透射、吸收等等进行检测，然后利用复杂的高级的智能算法得出相关的数据。 绿光在血液中散射少，信号幅度大，造成小，容易检测环境。绿色功能容易被人体吸收，不易被干扰。但是血液对红光和红外光的吸收少，散射强，从而对信号呢造成干扰，所以要用绿光。 为什么呢？感谢您关注马老师科学工厂科学的解释，请查看留言区留言。

小科普一下吧，当然跑路长时间不使用没电了。再次充电时会发现出现这样的情况，充电一段时间后会变成绿色闪电，加时间还发烫，但是还是开不了机，这个时候别慌着找售后或者维修，用原装的充电线跟充 电器充一个晚上或更久一点也可以换用大功率的二十瓦三十瓦左右的充电器去充，只要手表之前是能正常使用的，基本都能点亮。别傻傻的看到别人能维修的视频，就找售后或者发过去维修，你学会了吗？

呃，现在我们来看这一台苹果手表六代的，然后我们可以看得到他这个内屏是发白发黄了，发力。 呃，同行在分离这个内屏的时候可能加热的太久，导致那个变色，所以发过来想让我们帮他更换一个偏光进去。我们先把屏幕拆下，现在放到那个加热平台，我们先把内屏分离出来， 分离出来之后呢，我们再把这个残余的 oca 清洗干净，清洗干净我们可以很清楚的看到右下角那边是发绿色的，这种情况我们直接贴一张平光上去就可以了， 我们贴好看一下效果啊，也没有任何气泡，贴的，我们可以看一下，已经看不到任何的那种发力发偏了，我们现在再装上几版再去测试一下。 呃，测试一下触摸什么都是 ok， 这样正常的话我们直接贴上 oca 重新贴合个玻璃上去就可以了，现在玻璃已经贴合好了，我们也可以看得到这个屏幕也没有任何的那个法律了。 好，现在我们装机在测试一下，如果正常的话，我们就给这位同行做好防水发回去就可以了。