Many customers come to us with the same question:<\/p>
\u201cWhy does the black screen look grey instead of true black?\u201d<\/p>
At first, this may seem like a display quality issue.
But in most cases, it is not a defect \u2014 it is related to the type of LCD panel being used.<\/p>
In this article, we\u2019ll explain:<\/p>
Why black looks grey on some TFT displays<\/p>
The real differences between TN and IPS panels<\/p>
How to choose the right display for your application<\/p>
<\/p>
The \u201cgrey black\u201d effect is most commonly seen on TN (Twisted Nematic) panels.<\/p>
To understand why, let\u2019s simplify how it works:<\/p>
In a TN panel, liquid crystals twist to control light<\/p>
This structure is fast and cost-effective<\/p>
But it cannot fully block backlight evenly<\/p>
Result:
Some light leaks through, so black appears more like dark grey, especially at different viewing angles.<\/p>
Important:
This is a technology limitation, not a quality issue.<\/p>
<\/p>
\u00b7 IPS<\/strong>: Deeper blacks, more consistent contrast<\/p> <\/p> <\/p> \u00b7 TN<\/strong>: Colors shift or invert when viewed from different angles<\/p> \u00b7 IPS<\/strong>: Stable image up to wide viewing angles<\/p> This is why IPS is preferred for multi-user environments<\/p> <\/p> \u00b7 TN<\/strong>: Limited color depth, less accurate<\/p> \u00b7 IPS<\/strong>: Richer and more accurate colors<\/p> Important for UI, medical, and high-end applications<\/p> <\/p> \u00b7 TN<\/strong>: Faster response, ideal for dynamic data<\/p> \u00b7 IPS<\/strong>: Slightly slower, but visually smoother<\/p> <\/p> \u00b7 TN<\/strong>: Functional and cost-efficient<\/p> \u00b7 IPS<\/strong>: More premium and visually consistent<\/p> In many projects, customers expect:<\/p> Deep black<\/p> High contrast<\/p> No color shift<\/p> But if a TN panel is selected: This often leads to:<\/p> Misunderstanding of product quality<\/p> Unnecessary complaints or returns<\/p> <\/p> Require better color accuracy<\/p> Need wide viewing angles<\/p> Care about visual experience<\/p> Typical applications: <\/p> Example:<\/p>Angle de vue<\/h3>
Color Accuracy<\/h3>
Response Time<\/h3>
User Experience<\/h3>
These expectations may not be fully met<\/p>
Medical devices, automotive displays, smart interfaces<\/p>