其實這篇原本是在我的渦輪風扇內的回文
不過想想主題差太多了，為了增加討論度跟可看性，我就拔出來了
不過因為文章搬移，大多是複製貼上，所以 P 幣應該會少很多...
其實認真討論的話，我認為 "平板過熱會弄壞螢幕" 方向應該是正確的
Surface Pro 4 所用的面板是 IPS LCD
我們直接把 IPS LCD 當關鍵字餵給搜索引擎，可以找到一篇 2008 年的文章
"IPS Monitors beware heat!!!!"
裡面提到他有一個 Dell 2007 IPS 的螢幕
『we had a run in of early spring heat heat and as the office got
to temps above 72 degrees more and more of one side would develop
the "dirty look" and icons ghosted』
這裡的 72 度應該是指華氏，而不是攝氏
這句話的重點是，他的螢幕也出現了殘影，也就是 "icons ghosted"
『5 inch band of discolored (looks a shade darker and is holding after
images) Last week we had 3 days of 88-94 degree weather and I know the
office got into the low 80s as the one AC unit is out in the front room.』
除了殘影之餘，他也出現了我們常見的黑色線條
另外一篇
"Ghosting when monitor is cold?"
裡面也是一樣的狀況，而且發文者似乎早有 LCD 過熱會有 "side effects" 的認知
有幾篇手機的
"Ghost images on a screen / image retention"
裡面主要討論是 LG V10 的手機，他的螢幕出現了 ghost icon
但是有趣的是 LG V10 並不是 LED 螢幕，他是 IPS-TFT LCD
下面的討論，有人開始懷疑這是高溫造成的，但是沒有更多的討論了
還有篇手機的
"How to Fix Screen Burn-In Problem on Moto G4 Plus"
Moto G4 Plus 螢幕是 IPS LCD ，他也有 ghost icon 的問題
『These icons are mostly visible on top, left and right side of
the screen. The problem gets worse when the phone starts to
heat. The more your Moto G4 Plus heat the more discoloration
and screen burn-in will happen on the screen.』
以上幾篇都顯示著高溫對 LCD 可能有相似且明顯的副作用
至於成因呢...我好像找到了，在一篇 Lenovo 的 issue 裡面
"LCD image persistence (ghosting)"
『Some users have reported an image persistence phenomenon; they are
able to create the image persistence by disabling screen savers and
leaving a fixed image on their screen for extended periods of time
- the persistent image is viewed only with a very light grey or off
white background』
這樣具體的形容，跟我們在 SP4 所遇到的現象非常類似
『Our testing indicates that the persistent images completely
dissipated in a short time period. The persistent image is caused
by the discharging of residual electromagnetic charges internal to
the LCD panel; when this charge has decayed or dissipated the
persistent image is gone. This persistence image is not similar to
previous generation CRT and monitor issues where the image was
"burnt in" on the screen. Any persistent image is not permanent or
damaging to the LCD panel.』
簡單的說，是由 LCD 內部有殘留的電磁放電現象所引起的
當這個電磁放電現象開始消散時，殘留在 LCD 的畫面即會消失
這並不像是烙印那樣會永久損毀於 LCD 面板上
底下還做了實驗比較 TN-LCD 以及 IPS-LCD 的差異
『Generally LCDs have a parallel electrical field, so all of the
display area can be symmetrically controlled. By comparison, IPS
LCDs have asymmetrical electrical fields in some small areas, the
image persistence phenomenon will occur at the asymmetrical electric
fields. The image will dissipate during power off or by an image
change in a short amount of time. This phenomenon is a natural
characteristic of an IPS LCD.』
這個現象主要是出現在 LCD 內部的電場不對稱的情況產生的電磁放電所致
TN 內部電廠是均勻且對稱，則不會產生
IPS 內部是不對稱的，所以容易發生
下方有圖解
TN:
http://download.lenovo.com/km/media/images/HT051485/ht051485_tn.jpg
IPS:
http://download.lenovo.com/km/media/images/HT051485/ht051485_ips.jpg
所以如果上述為真，那討論方向應該要往 LCD 溫度以及電磁放電現象著手
這就希望有能人異士帶頭來討論了，畢竟這已經不是我的專業了
如果最後有機會證實，只要是 IPS-LCD 就會產生這樣的現象
那想要叫微軟陪，恐怕是更加不可能了，因為這已經從 bug 變成 feature 了
就像用 OLED 螢幕，一定會有烙印的問題等等
如有錯還請指證，謝謝