Hello everyone, I am the editor. Do you know why LCD screens exhibit ripple effects when pressed? Today, I will provide a detailed analysis of this phenomenon. I hope it proves helpful to you.

LCD liquid crystal screens employ various alignment methods, which is why they are categorized as TN screens, IPS screens, etc. Among these, the TN type is particularly prone to producing ripple-like distortions, a characteristic that also defines most so-called "soft screens."

Imagine the liquid crystals as elongated rod-like structures that primarily adjust their inclination angle relative to the vertical direction to modulate grayscale levels. When pressure is applied, this inclination angle undergoes significant changes, leading to visible distortions. This explains why TN screens are more susceptible to ripple effects.

In contrast, IPS screens utilize a different alignment method where the liquid crystals adjust their inclination angle relative to the horizontal direction to control grayscale levels. When vertical pressure is applied, the change in inclination angle is minimal, resulting in reduced distortion. Additionally, the recovery speed of liquid crystals in IPS screens is significantly faster than in TN screens, enabling them to quickly return to their original state. It is important to note that the reduced ripple effect in IPS screens is not solely due to the use of hard glass but rather the distinct arrangement of liquid crystals and the associated electric field orientation. IPS technology allows for the use of hard glass substrates, whereas TN technology does not.

The principle behind TN liquid crystal displays involves printing circuit boards on both the upper and lower glass plates, precluding the use of hard glass. In contrast, IPS liquid crystal displays only require circuits on the lower glass plate for control, allowing the upper layer to be flexible in terms of thickness, hardness, or softness.