Since 2020, Samsung QLED series TVs announced the new Dual LED technology. Samsung even filed a patent for Dual LED.
What is Dual LED – in order to see the image, you need to highlight the LED screen at the back. Samsung came up with two types of LEDs to highlight the image. One LED shines with a cold light, the second shines with a warm light.
According to Samsung, this type of backlight will make the image on the TV screen even more realistic.
How Dual LED works on Samsung TVs
Let’s consider how changing the spectrum of backlighting can affect picture quality. The pixels on a TV screen act like filters, allowing only certain wavelengths of light to pass through. The materials used to create these pixels have a selective bandwidth for transmitting light, and there are only three colors involved: red, blue, and green. Essentially, the type of backlighting—whether it is cold or warm—does not significantly impact the overall picture quality; this is primarily determined by the pixel crystals, which transmit only specific color spectrums.
Cold backlighting features a predominance of blue tones, which can make the light appear very white or snow-white. In contrast, warm backlighting has reduced blue tones, resulting in a more yellowish light.
This effect can be achieved with any type of backlighting. While dual LED backlighting may offer some improvements in combination with LED display pixels, its benefits are often minimal and may be overstated, largely resembling a marketing gimmick. Any enhancements from dual LEDs are so slight that they might be considered negligible.
