How to distinguish TN LCD screens from IPS LCD screens

      Customers often ask what is a TN LCD screen, what is an IPS LCD screen, and what is the difference between the two. The editor will briefly explain it here.

. Detailed explanation of technical principles and characteristics:

1. Response time

· TN screen:

Adopting "Twisted Nematic" technology, the liquid crystal molecules rotate quickly, and the response time can reach 1-5ms, which is suitable for high-speed dynamic images (such as gunfights and racing in games).

Disadvantages: "Afterimage" or "smear" may occur when switching quickly.

· IPS screen:

Adopting "In-Plane Switching" technology, the liquid crystal molecules are arranged horizontally, the response time is 6-15ms, and the dynamic picture smoothness is slightly inferior to TN.

Advantages: No ghosting problem, suitable for long-term viewing.

2. Viewing angle

· TN screen:

The viewing angle is narrow (usually 170°-180°), and the color and brightness will be significantly attenuated when viewed from the side or bottom, and even "inverted color" (such as white turning gray).

Example: When multiple people are sitting together, only the user in front can see the full picture.

· IPS screen:

The viewing angle is wide (120°-170°), and the color and brightness remain stable at a larger angle, which is suitable for sharing screens or home theaters.

Example: When watching a video sideways, the picture has no obvious distortion.

3. Color performance

· TN screen:

The color gamut coverage is low (about 60%-70% NTSC), the color reproduction ability is weak, and the contrast ratio is average (about 1000:1).

Disadvantages: Insufficient details in the dark area and low color saturation.

· IPS screen:

Supports wide color gamut (such as 95% DCI-P3 or 100% sRGB), high color accuracy, and stronger contrast (above 1500:1).

Advantages: Suitable for color-sensitive work such as film and television editing and graphic design.

4. Power consumption and thickness

· TN screen:

Simple structure, low power consumption (20%-30% power saving compared to IPS at the same size), thinner thickness (about 5-7mm).

· IPS screen:

Requires an additional electrode layer to control the molecular arrangement, high power consumption, and slightly thicker thickness (about 6-8mm).

II. Advanced identification method

1. Software detection:

· Use DisplayHDR Viewer or X-Rite ColorMunki to detect color gamut coverage and gamma value.

· IPS screens are usually marked "wide viewing angle" or "ALL".

2. Physical test:

· Viewing angle test: When multiple people observe the screen from different angles at the same time, the color consistency of IPS screen is better, while the viewing angle of TN screen will be relatively narrow. If the viewing angle is too large, the screen will change color.

· Response time test: When sliding the mouse quickly or playing dynamic videos, the TN screen will have less residual images.

3. Parameter query:

· Check the panel type in the product specifications (clearly marked as TN/IPS/VA).

· Pay attention to the color gamut standard (such as 100% sRGB means excellent color, and TN screens rarely meet the standard).

      TN LCD screen glass has high transmittance. Under the same backlight conditions, TN will have higher brightness. TN glass cost is relatively cheap, which is more cost-effective for customers with price requirements; IPS is better than TN in terms of viewing angle, display effect and other parameters, but the unit price is relatively higher. Customers need to choose according to the positioning of their products. Shenzhen Hongjia Technology specializes in the production of 1.14-inch to 10.1-inch LCD screens and matching touch screens. Both TN and IPS are available, with complete sizes and multiple interfaces. Customers are welcome to email for consultation.