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Quantum Dot

Quantum dots that emit their own light can compose a wide range of detailed and precise colors at every contrast level. With their efficient use of light and simple structure, they are being used in the next generation of large displays.

Image of dot pattern
Quantum Dot display

QD display structure and principle

Display screen with night view background

QD
(Quantum Dot)

As very small semiconductor crystals that emit their own light, they create a wider variety of colors at wider angles. Also, they are structurally simpler and more efficient than LCDs, providing for lighter and thinner displays.

Blue self-luminescence

With the strong energy of blue light, QD can create richer colors. By quickly turning on and off individual pixels, QD seamlessly delivers the deep and rich quality of perfect blacks.

Image explaining the QD display

Fast and smooth images

The LCD, which produces light from the backlight unit, moves the liquid crystal to control the amount of light and compose images. It takes time for the circuit to send signals to the liquid crystal, and for the liquid crystal itself to move physically. However, in the QD display, signals from the circuit directly produce light as needed in the QD light emitting layer, so it doesn't need to spend much time controlling the light. QD's fast response time can compose clean images without afterimage effects, even in videos with fast moving objects such as car racing or other sports.

Image showing the portion of harmful blue light

Reduction of harmful blue light

The QD display reduces "harmful blue light," which can be dangerous to your eye health, by 40 to 50% over LCDs, and this is the lowest level of all current displays. The QD display's blue light from the self-luminescent layer greatly reduces the portion of blue light when producing light, so it can be relatively safer from threats to your eye health.

Effects of harmful blue light

· Visual discomfort

· Harm to retinal cells

· Disruption of your sleep cycle

· Premature aging of your retinas

Clear image quality

Brighter and broader color expression

80% more color expression possible with QD display

The QD display has a very high degree of color purity of blue light produced from the blue light source, and the color purity of red and green that receive this light and form the QD device is high. With this high color purity, this technology has one of the broadest color expressions among current displays. Also, it can express a very broad range of colors at any brightness, from dark to light. Based on BT.2020 Color Volume, a typical large display has a color volume of less than 60%. But QD displays can express a color volume of above 80%.

Comparison of the luminance ratio from the front between QD displays and conventional displays

Bright and clear image quality from any angle

QD emits light equally in all directions, minimizing the changes in image quality from different angles. At 60 degrees from the front, the luminance ratio from the front of conventional LCDs compared to their brightness is less than 40%. But for QD displays, it's more than 70%, which is the smallest change in luminance at different viewing angles compared to other large displays.

Comparison between QD displays and conventional displays

Clear and low-reflective screen in any place, any environment

You may have been bothered by the sunlight coming through the windows, lights from the ceiling, fluorescent lights in stores, or other kinds of lights reflecting off of your display and obstructing your view. Displays that use glass as their material have this problem. The QD display reduces this reflection to its lowest level among all current displays with Samsung Display's reflection reduction technology, so you can see cleaner and clearer images where ever you go.

Flawless blacks

More natural diverse brightness

Explanation of the QD display's contrast ratio

Wider range of high contrast ratio

Conventional displays limit screen brightness because of light source or power consumption issues. With the backlight unit as the light source, it is almost impossible for LCDs to control the brightness of each individual pixel, limiting their ability to show you perfect blacks on screen. Unlike LCDs, the blue light source of the QD display can control the light source of each individual pixel. QD displays with 4K resolution has about 8.3 million (3840x2160) light sources that can be controlled separately. This way, the QD display enables a high contrast ratio of 1,000,000:1 for perfect blacks to compose a deeper and more detailed image quality.

Clear QD display with no afterimage effect

Clear image quality of flawless blacks

Because it's impossible to fine-tune the light source in LCDs, the light used to express brighter areas affect the darker areas. This problem is called the halo effect, and it's especially noticeable when showing objects on the screen against a dark background. But with QD displays that can control the light source for each individual pixel, they can precisely show light and dark only where they should be, so they do not have this effect.

Image of a purple sky and waterfall

Images that feel brighter than they actually are

When you perceive the brightness of a display, you are not only seeing the actual physical brightness of the display, but also the expressiveness of blacks and color saturation. Even with the same luminance, the contrast looks different depending on the contrast of the background. The better the display shows the blacks, the brighter it looks. Also, the brightness feels different depending on the color type. The higher the saturation of the same color, the brighter it looks. But the QD display's excellent expression of blacks and a broader range of colors makes the display look brighter than it actually is.

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