LED means light-emitting diode and that’s a technology that describes a semiconductor light source that emits light when electric current flows through it. In more common words, that are diodes that emit light to make a TV display picture. And of course, companies’ research and development (R&D) departments are always working on making the displays better.

The Dual LED is one of such improvements and it should enhance the picture quality.

Dual LED on Samsung TVs explained

Since 2020, Samsung announced that QLED series TVs will feature the new Dual LED technology. Samsung even filed a patent for Dual LED and on October 21, 2019, Samsung Electronics applied for a trademark with the EUIPO (European Union Intellectual Property Office) for the name Dual LED. The application is categorized as class 9, with the description: ‘televisions; television monitor; television sets; remote controller for TV; stand for TV; wall mounting’. You can view the trademark for Dual LED here.

What is Dual LED? To display the image, the TV needs a LED backlight, and Samsung came up with two types of LEDs to backlight 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

Can change the backlighting effect picture quality? Let’s speculate.

The pixels on the screen are a kind that only transmits one wavelength. Therefore, the materials from which the pixels are made have a selective bandwidth of light transmission. There are only three types – red, blue, and green.

• Cold color – blue color prevails, it seems to us that this color is very white, snow-white.
• Warm color – reduced blue color, the light becomes more yellow.

It turns out that changing the type of backlighting can only affect the brightness of the blue pixels. Accordingly, the image will change in the blue spectrum, which means a change in overall perception, the image will be warmer or cooler, the color tone of the image will change.

How these LEDs will work together or individually is not yet known. However, on the other hand, there seems to be nothing special about it, TV sets have already had different dynamic modes for example for games, movies and so on for a long time.