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Quantum Dot

Quantum dots that emit light by themselves can implement various and accurate colors at each level of light and dark, and are being used in next-generation large-scale displays due to their efficient use of light and a simple structure.

Image of dot pattern
What is QD Display?

What are quantum dots?

Quantum dot color structure

Quantum dots that emit their own light can compose a wide range of detailed and precise colors at every contrast level and are receiving attention as they will be used in the next-generation large displays with their efficient use of light and simple structure.

Structure and principle of QD display

Display screen with night view background

Blue
self-luminescent
layer

QD layer

Comparison of structural diagrams of LCD and QD displays

QD display, a self-luminous display, consists of a TFT layer, which is an electronic circuit that controls the light emitting layer, a light source that emits light, and a QD light emitting layer that expresses colors using the light emitted from the light source.

QD display uses blue, which has the strongest light energy, as a light source, so it can achieve relatively bright luminance.

In particular, Samsung Display's QD technology utilizes a front light-emitting method that efficiently utilizes light, enabling a simpler and more efficient structure, unlike LCDs that require a backlight, providing a thin and light display.

Why QD Display?

Wide Color Gamut

80% more color expression possible with QD display

x 1.5

Conventional
Display 60%

QD-Display 80%

*Color Volume,
ICtCp BT2020 Normalized

QD-Display

Conventional Display

The blue light generated from the light source of the QD display has a very high color purity, and the red and green QD that produces color by receiving the blue light also produces color light with high color purity. RGB with high color purity can express a broad range of colors. Therefore, the QD display has a very wide range of color expressions among current displays and can show colors closest to what we see with our eyes.

Excellent viewing angle

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

Conventional Display

QD-Display

(Luminance ratio at the front side)

LCD

Color
Filter

Back Light

QD-Display

QD
Conversion
Layer

Blue EL Self-Emission

In general, light has a linearity, so when viewing the display, it affects the brightness or color depending on which angle you look at the screen. With the characteristic of QD that emits light uniformly in all directions, the QD display provides optimal image quality by delivering uniform luminance and color regardless of viewing angle.

Explanation of the QD display's contrast ratio

Conventional Display
100,000 : 1

Conventional Display

QD-Display
1,000,000 : 1

QD-Display

High contrast ratio

The contrast ratio is the difference between light and dark on a screen expressed by a number. In general, displays limit screen brightness because of light source or power consumption issues. Therefore, how deeply the black color is expressed significantly affects the contrast ratio.

For LCDs that use a backlight unit as a light source, the brightness of each pixel cannot be adjusted because the backlight is always on. Therefore, there is a limit to expressing a completely black color.

In QD displays, the light source can be adjusted for each pixel. Therefore, in black color that expresses dark colors, more perfect black is expressed by turning off the light source of the pixel.

The QD display enables a high contrast ratio of 1,000,000:1 thanks to the darker black color expression, therefore, deeper and more detailed image quality can be realised.

Image showing the portion of harmful blue light

Best for Eye Health

In the visible spectrum, short-wave blue light with wavelength between 41 nm and 455 nm is known to affect sleep by increasing eye fatigue and suppressing melatonin secretion with its short wavelength and strong energy.

The QD display reduces the “harmful blue light” that affects the human body by 40-50% compared to general LCDs, allowing for more comfortable viewing.

Features of each application

TV

Explanation of the QD display's contrast ratio

HDR Coverage

100%

QD-Display

85%

LCD

54%

HDR or High Dynamic Range imaging refers to a technology that expands the dynamic range in digital images, making bright areas brighter and dark areas darker so that the image is closer to what humans can see with their eyes.

Therefore, for better HDR implementation, it is important to produce a scene with a wide range of brightness. QD display can express a vast range of brightness with perfect black. In addition, it can express a wide range of colors according to the change of brightness, which enables excellent HDR expression compared to competing technologies.

Comparison between QD displays and conventional displays

QD-Display

Conventional TV

Various lights such as sunlight coming through windows, ceiling lights, ambient lights, etc. are reflected off the display and obstruct our view, making it difficult to see a clear image on the screen.

The Samsung QD display is designed with an optimal structure to minimize reflection of light, so it has the lowest level of reflection of light among currently existing displays.

This provides the best image quality without reflection of light, even in bright viewing conditions, regardless of location and environment.

Monitor

Image explaining the QD display

Blue EL Self-Emission

QD-Display

Conventional Display

The Samsung QD display provides an optimal environment for gaming or watching videos by realizing a seamless screen with faster response time.

When the screen response speed is slow, an afterimage occurs in fast moving images, increasing eye strain.

LCDs exhibit slow response time because it takes time to physically move the liquid crystal by transmitting a signal to the liquid crystal. On the other hand, QDs exhibit fast response time as signals from the circuit directly produce light, making the light control time very short.

Thanks to this, you can enjoy clear movements in a more comfortable environment by realising a clean screen without afterimages.

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