買螢幕必測！如何檢查壞點、亮點與漏光？
剛買了新螢幕很興奮？先別急著丟箱子！螢幕面板在生產過程中難免會有良率問題。七天鑑賞期內，最重要的就是進行「驗機」。本文教您如何使用 GearLab 進行標準檢測。
什麼是壞點 (Dead Pixel)？
液晶螢幕由數百萬個畫素組成。如果其中一個畫素的電晶體故障，就可能形成壞點。
- 亮點 (Bright Dot)： 在全黑背景下，某個點持續發光 (紅/綠/藍/白)。這通常在保固範圍內。
- 暗點 (Dark Dot)： 在全白背景下，某個點始終是黑色的。廠商通常容許少量暗點 (例如 3 點以內)，這屬於「正常」範圍。
什麼是漏光 (Backlight Bleed)？
這主要發生在 IPS 面板。在全黑環境並顯示全黑畫面時，螢幕四個角落出現發白或發黃的光暈。如果是均勻的光暈通常是 IPS Glow 屬正常特性；如果是明顯的不均勻亮斑，則是組裝瑕疵。
檢測步驟
- 清潔螢幕表面，確保沒有灰塵干擾。
- 關閉室內燈光，環境越暗越好。
- 開啟 GearLab 的 壞點檢測工具。
- 依序切換黑、白、紅、綠、藍五色。
- 眼睛距離螢幕約 30 公分，仔細掃描每一個區塊。
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Must-Do Screen Tests: Dead Pixels & Backlight Bleed
Excited about your new monitor? Don't throw away the box yet! Production defects happen. The most important thing to do within your return window is a "Screen Check." Here is how to use GearLab for a standard inspection.
What are Dead Pixels?
LCD screens consist of millions of pixels. If a transistor for a pixel fails, it creates a defect.
- Bright Dot: A pixel that stays lit (Red/Green/Blue/White) on a black background. This is usually covered by warranty.
- Dark Dot: A pixel that stays black on a white background. Manufacturers often allow a small number of dark dots (e.g., up to 3) as "normal."
What is Backlight Bleed?
Mainly an issue with IPS panels. It appears as whitish or yellowish light leaking from the corners on a dark screen. Uniform "Glow" is normal for IPS; distinct, uneven bright spots suggest assembly defects.
Inspection Steps
- Clean the screen surface to remove dust.
- Turn off room lights (the darker, the better).
- Open GearLab's Dead Pixel Tool.
- Cycle through Black, White, Red, Green, and Blue.
- Scan every zone of the screen from about 30cm away.
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