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QD Film

with over 20 years experience in display industry

Keith Keller
Keith Keller

Quantum Dot (QD) films, also known as Quantum Dot Enhancement Films (QDEF), are thin layers of semiconductor nanocrystals that are integrated into display panels to enhance color reproduction and overall image quality. Here’s some technical information about QD films:

*Composition of QD Film: Quantum dots are nanometer-sized semiconductor particles typically composed of materials such as cadmium selenide (CdSe), cadmium sulfide (CdS), or indium phosphide (InP). These materials exhibit quantum mechanical properties that enable them to emit light of specific wavelengths when excited by energy sources such as blue LEDs.

*Functionality of QD Film: Working by converting the blue light emitted by the backlight of an LCD display into very narrow-bandwidth red and green light. These red and green lights blend with the remaining blue light to create a broader spectrum of colors, resulting in more vibrant and lifelike images.

*Placement of QD Films: The films are typically placed between the backlight unit and the LCD panel in a display. When blue light from the backlight unit passes through the QD film, it excites the quantum dots, causing them to emit red and green light. This combination of blue, red, and green light produces a wider color gamut compared to traditional LCD displays.

*Advantages of QD Film: To improved Color Gamut is one of the primary advantages of QD film. It can expand the color gamut of displays beyond what is achievable with conventional LCD technology. By precisely controlling the size of the quantum dots, manufacturers can tailor the emitted wavelengths to match specific color standards such as DCI-P3 or Rec. 2020, resulting in more accurate and saturated colors. Also, Quantum dots exhibit high quantum efficiency, meaning they can convert a significant portion of the incident blue light into red and green light. This efficiency helps improve the overall brightness and energy efficiency of displays utilizing QD technology. The use of quantum dots can lead to brighter displays with improved visibility, especially in brightly lit environments.

*Applications: QD films are commonly used in LCD televisions, monitors, and other display devices to enhance color performance. They can also be integrated into other types of displays, such as OLED panels, to further improve color accuracy and efficiency. Joindisplay’s new product laminated with QD Film apply in medical territory shows very high contrast ratio and color performance. For further details about our product, welcome to contact with us anytime.

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