What is Quantum Dot Technology?

Display technologies can be confusing, especially when the market is packed with acronyms like UHD, HDR, FPS, and LCD. One term that now appears more and more often in monitor specs is quantum dot, sometimes shortened to QD in formats like QD-LED or QD-OLED. Often associated with brighter images, richer colors, and improved HDR performance, quantum dot technology plays an important role in modern displays. This post explains what quantum dots are and why they matter when choosing a monitor.

Continue reading to find out everything you need to know about quantum dot technology, or take a look at ViewSonic’s gaming monitors, which include models with quantum dot capabilities.

Quantum dot technology has quickly become one of the most talked-about innovations in modern displays. From TVs to gaming monitors, it is often associated with brighter images, richer colors, and better HDR performance. But what exactly does quantum dot technology do, and why does it matter for monitors? Let’s dive in and see.

What is Quantum Dot Technology?

Quantum dots are semiconductor nanocrystals, typically only a few nanometers in size, that emit very precise colors when exposed to light. They were initially added to advanced LED displays before making their way to newer OLED displays as well. To understand their benefits, it helps to first look at how today’s displays create light and color.

Understanding LED and OLED Displays

Most modern monitors labeled as LED are actually LCD panels that use light-emitting diodes for backlighting. LEDs are semiconductors that emit light when an electric current passes through them. Because LEDs do not naturally emit white light, most LED-backlit LCDs rely on blue LEDs coated with a yellow phosphor to produce white light, which is then filtered into red, green, and blue by the LCD panel.

OLED displays work differently. They use self-emissive pixels that produce their own light, without a separate backlight. In traditional OLED panels, each pixel emits white light that passes through color filters to create red, green, and blue subpixels. The white OLED panel is sometimes referred to as WOLED.

Quantum dot technology enhances both of these approaches by improving how color is created from light. Instead of relying solely on color filters, a quantum dot layer converts blue light into highly accurate red and green wavelengths. This results in improved color accuracy, a wider color gamut, and higher brightness.

Displays that combine quantum dots with LED-backlit LCD panels are often called QD-LED or quantum dot LCDs. When quantum dots are paired with OLED technology, the result is known as QD-OLED.

How Do Quantum Dot Displays Work?

At a practical level, quantum dot displays work by precisely controlling how light is converted before it reaches the screen. Each pixel ultimately displays red, green, or blue light, or sometimes a combination of all three. The wavelength of that light defines the color accuracy of each pixel.

Quantum dots are typically arranged in a thin film layer positioned between a blue light source and the display panel. When blue light shines on the quantum dots, they emit highly pure red and green light. Together with the original blue light, these colors combine to create more accurate and saturated colors on screen.

The illustration above shows how quantum dots are positioned in a QD-LED display. The blue light source emits light that passes through the quantum dot enhancement film, producing red, green, and blue light. This light then passes through the panel and color filters before reaching the screen to form the final image.

Advantages of Quantum Dot Technology

The added quantum dot layer brings gaming monitors a whole host of benefits.

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Precise Color and Higher Peak Brightness

As quantum dots emit a very precise amount of light, produced color appears very accurate. The nanocrystals render a wider color spectrum at maximum brightness without loss of saturation. This allows pictures to remain clear even in brightly lit rooms. And brightness is critical to high dynamic range (HDR) experiences. It ensures that all details of light and color onscreen seem more lifelike.

Better Energy Efficiency

Quantum dots do not require electrical power to operate and instead convert incoming light into very precise wavelengths. Because this conversion process is highly efficient, quantum dot displays can achieve higher brightness and improved color performance without a proportional increase in power consumption compared to traditional LCDs. This improved efficiency can help reduce overall energy use during everyday operation. Unlike conventional LCDs that rely heavily on color filtering, quantum dot displays convert light more directly, reducing wasted energy and improving efficiency.

Longer Lifespan and Low Burn-In

Quantum dot provides a longer display lifespan thanks to improved and energy-efficient lighting, especially important in OLED monitors. Quantum dots are highly stable and degrade much more slowly than organic emissive materials, meaning these displays are less prone to burn-in. Burn-in is when part of an image appears like a “ghost” on the screen and refuses to go away. This happens when pixels become damaged or worn out.

Versatile Sizes and Thinner Panels

Since quantum dot technology is more cost-efficient at scale, quantum dot displays can be made in a greater range of sizes, even as large as 98 inches. They can also be applied on large, thin, and flexible panels, making them easy to transport and install.

Quantum Dot vs. OLED: What’s the Difference?

It’s easy to get the different kinds of display technologies mixed up. Quantum dots are a technology that can apply to both LED and OLED displays. OLED uses organic compounds that glow when electricity is introduced. This effect is called electroluminescence.

The image below shows how an OLED display works. The organic emissive layers are sandwiched in between a negatively charged cathode and a positively charged anode layer. An electric current travels through each layer from the cathode to the color filter to produce colored light.

Unlike quantum dot LED (QD-LED) which uses backlights, every pixel in an OLED display is self-emissive. The organic materials in an OLED screen are usually more expensive to produce and have a shorter shelf life due to degradation, though this has improved over time. An OLED’s self-emitting pixels do not produce the same amount of brightness as a quantum dot LED, but they can project the blackest black available for deeper contrast.

When it comes to screen burn-in, OLEDs are more susceptible to image retention. However, it is important to note that OLED displays also deliver great viewing angles, the fastest response times, and infinite contrast. And newer OLED monitors tend to have built-in anti-burn-in protection like ViewSonic OLED Care.

In QD-OLED monitors, the OLED layer uses blue light instead of white light (WOLED), and a layer of quantum dots replaces the filters. The quantum dots convert blue OLED light directly into red and green, rather than filtering white light. The result is better color saturation and overall better game visuals. QD-OLED monitors also have improved brightness for better HDR content.

Learn more about OLED vs. QD-OLED monitors.

Are Quantum Dot Monitors Good for Gaming?

Most displays that feature quantum dot technology are televisions, but quantum dots are also of great benefit in monitors. Especially in the world of esports, gamers prefer to play on gaming monitors that can provide an immersive viewing experience. QD-LED and QD-OLED monitors present games with dramatic lifelike picture quality, more vibrant colors, and sharper contrasts.

Should gamers want to enable HDR, quantum dot offers darker blacks, a wider color gamut, and higher brightness as compared to a regular screen. And quantum dot monitors deliver better performance with their added features such as sync technology and black level stabilization. This means gamers can blast through graphics-intensive games and still see every single element in captivating detail.

Getting the Most Out of QD-OLED Monitors

While OLED burn-in may have been a concern in the past, many would now agree that OLED monitors are worth it. The best OLED gaming monitors reduce panel stress and burn-in risk by using premium materials as well as anti-burn technologies like pixel shifting, screen refresh cycles, static icon detection, and auto brightness adjustment. Static icons like logos and game UI used to be the main reasons for burn-in, but with QD-OLED, the risk of burn-in is significantly reduced compared to conventional OLED displays.

It’s important to look for a QD-OLED gaming monitor that combines the best material design with extensive screen protection features, such as the ViewSonic XG2738-2K-OLED. In addition, there are precautions you can take to further safeguard your quantum dot investment.

Use screen savers and dimmers wherever available, for example, and make sure to never leave a static image on for too long. Also, activate all available screen protection and display health features in the monitor’s on-screen display (OSD).

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Final Thoughts

Displays with quantum dot technology offer color-rich imagery and many other benefits. From a gamer’s perspective, quantum dot screens elevate the standard viewing experience into a cinematic treat. One thing to note is that quantum dot technology is constantly being refined to bring environmentally friendly displays with better color performance, higher brightness, and perhaps even lower costs. So, it’s only a matter of time before quantum dot gaming monitors become much more prominent in the market.

To learn more about gaming displays, you can check out our range of esports monitors and other gaming displays.

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