Compare IPS, TN, VA, QLED – Which is the best LCD screen technology?

Surely when learning about Android screens for cars or other screen-related products, you have heard names like IPS, TN, QLED,… and there are many other types of screens. together. So which is the right type of screen that provides the best quality and is most suitable for you? In this article, CarOn Pro will help you compare different types of panels to find out which is the type of panel you need.

What LCD screen technologies are there?

For the car entertainment screen market in particular and display screen products in general, we will often be equipped with popular panel technologies such as: IPS, VA, QLED, TN.

Each type of panel will have different technical characteristics such as: color fidelity, screen depth, brightness, viewing angle and physical durability.

Depending on actual usage requirements as well as production costs, each type of product with a display screen will choose a different type of panel.

Although they have different technical characteristics and names, all four types of screen technology above have in common that they all use LCD (Liquid Crystal Display) – also known as liquid crystal display.

What is LCD?

LCD liquid crystal display (Liquid Crystal Display) is made up of cells (pixels) containing liquid crystals with the ability change the polarization of light and change the intensity of transmitted light when combined with polarizing filters.

To put it more simply, LCD is technology Use backlight to create light but it does not emit light on its own.

LCD screens are a giant leap forward in terms of screen technology. LCD allows screens to be much thinner than cathode ray tube (CRT) technology. LCD screens consume much less power than previous screen technologies because they work by blocking light, not emitting it.

How LCD technology screens work

The first mass-produced LCD screen technology was called TN (Twisted Nematic). The principle behind LCD displays is that when an electric field is applied to liquid crystal molecules, the molecules will twist 90 degrees. When light from ambient light or from a backlight passes through the first polarizer, the light is polarized and twisted with the layer of liquid crystal molecules. When it reaches the second polarizer, it is blocked. Viewers see a black screen.

When an electric field is applied to liquid crystal molecules, they do not twist. When polarized light reaches the layer of liquid crystal molecules, the light passes straight through without being twisted. When it reaches the second polarizer, it will also pass, the viewer sees a bright screen.

Because LCD technology uses an electric field instead of an electric current (passing electrons), it has low power consumption.

Operating principle of LCD screen - CarOn Pro smart screen
Operating principle of LCD screen

Characteristics of LCD screen technologies

TN screen (Twisted Nematic)

This type of screen is the most commonly produced among all types of LCD screens. This type of LCD screen is commonly used in the production of screens with high response rates such as gaming screens. Although it has a very high response speed, the color and contrast of the screen is not good, so it is not suitable to use it to produce professional screens for design.

What is TN screen - Operating principle of TN-CarOn Pro technology screen
Operating principle of TN screen

VA screen (Vertical Alignment Panel)

VA technology offers better color reproduction and wider viewing angles than TN, but has a slower response time. They also offer great viewing angles and good color reproduction, although not as good as IPS. VA response times are typically worse than TN or IPS, and there have been reports of some VA panels suffering from input lag, so VA technology is often not the best choice for fast-paced gaming .

What is a VA screen - Operating principle of VA technology screen - CarOn Pro
Operating principle of VA screen

TFT screen (thin-film transistors)

This type of screen uses thin-film transistors. The pixels are controlled independently by a transistor. Because it is marked with a distinct address, the state of each pixel can be controlled independently and simultaneously, avoiding ghosting common in DSTN LCD – also known as passive matrix displays.

What is a TFT screen - Operating principle of TFT technology screen - CarOn Pro
Operating principle of TFT screen

IPS screen (In-Plane Switching Display)

At the time of launch, IPS screens were considered the best quality LCD screens because they had wide viewing angles, realistic colors and good response speed. Therefore, this type is often used to produce popular types of screens such as graphic design screens, gaming screens, etc.

The difference between IPS screens and TN and VA screens
The difference between IPS screens and TN and VA screens

QLED screen (Quantum dot LED)

QLED display, also known as quantum dot display, is a display device that uses quantum dots, semiconductor nanocrystals that can produce red, green, and blue monochromatic light. Luminescent quantum dots are used in LCD backlights and/or display color filters.

Quantum dots are manufactured nanocrystals composed of ultra-fine semiconductor materials. The purpose of quantum dots is to produce different colors of light depending on the size of the particle at that time. A larger particle will lean toward appearing as red, and the smaller the particle, the more blue it will appear.

Quantum dots can emit precisely colored light because particle size adjusts to velocity at the quantum level, resulting in precise and efficient light emission. This is the main reason why QLED technology means huge improvements in overall picture quality.

Operating principle of QLED screen - CarOn Pro smart screen
Structure of QLED screen compared to other types of LCD

Should I choose IPS or QLED?

Both IPS screens and QLED screens have different characteristics, both have disadvantages and advantages, so determining which is a quality screen technology will depend on the user’s needs. How are you?

So that you can accurately determine the strengths and weaknesses of these two types of screens, CarOn Pro will provide comparisons in each of the different characteristics.

Color display quality

Both technologies produce high quality images. However, when it comes to color accuracy, QLED outperforms IPS displays

As for QLED displays, quantum dots emit light in different colors based on their size. Furthermore, the light can be adjusted to create a specific lighting shade. Because of this characteristic, QLED displays will be the perfect choice for producing ultra-high resolution displays thanks to increased color accuracy, intensity, contrast ratio and maximum brightness.


Quantum Dot displays typically have much wider viewing angles than IPS panels. Although IPS panels can only offer 178-degree viewing angles, most QLED displays can be viewed from nearly any angle without sacrificing contrast or color accuracy.

This makes them ideal for use in large group environments, such as gaming competitions or large gatherings where you must sit at a different angle from the screen than when you Install smart screens in cars, but viewers sit in different positions in the car.

Level of energy consumption

IPS screens will use more power than QLED screens, because IPS LCD requires a much higher brightness backlight than QD screens. This means that QLED screens use less power making them more energy efficient in many cases, such as using the smart screen in a car without starting the engine.

Based on the information CarOn Pro just shared, you probably have the most general overview of screen technologies, the strengths and weaknesses of each type of technology.

With many years of experience in research and product development in the automotive field, we have advice that when using smart screens in vehicles, you should choose screens that use QLED technology because this is the technology that brings the most benefits. With a wide viewing angle, everyone sitting in the car, regardless of position, will be able to see images with the best color fidelity.

You can refer to CarOn Pro’s smart screen product lines for cars to experience products with the most vivid and high-quality QLED screens with resolutions up to 2K here.

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