It is this property that makes quantum dots useful in display devices, such as televisions. The wavelength of the emitted light can subsequently be altered precisely by changing the size, shape, or material of the quantum dot. Quantum dots absorb light of a range of wavelengths and emit light of a different, defined wavelength depending on their size or composition. These nanostructures confine the motion of valence band holes, conduction band electrons, or excitons in all three spatial directions. Quantum dots are semiconducting nanostructures that are so minute they have different optical and electrical properties than larger particles. Quantum dot TVs perform a very similar process, but they use semiconducting nanocrystals to enhance the picture–particularly with respect to color reproduction. Color filter films convert the single wavelength backlight to generate three basic colours (RGB) for the LCD display. Photons are selectively obstructed by the liquid crystals, which is how an image is produced on-screen. When these LEDs are activated, their light is aimed through a polarized filter using a light-guide plate. In a conventional LCD TV, there is an LED backlight–or occasionally two banks of LEDs at the edge of the screen. But what are quantum dot TVs and what differentiates them from other display technologies? More specifically, what is a quantum dot TV? Quantum Dot TVs: Innovative LED LCDsĪ quantum dot TV is essentially a new type of LED-backlit LCD TV with dramatically enhanced color. The main takeaway for consumers is that these innovative displays offer the best picture quality ever realized on-screen, with deep blacks, optimal viewing angles, and pristine colors. If you are familiar with the latest TV technologies, you have likely come across acronyms like QLED TVs, OLEDs, and even QD-OLEDs.
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