There’s only a difference of a single alphabet between the two most popular high-end image technologies, but they’re fundamentally as different as night and day. Cutting to the chase:
QLEDs – Quantum-Dot Light Emitting Diodes
An advanced extension of the age-old LED-LCD screens are QLEDs that essentially adds a fancy quantum-dot layer to the LED-LCD sandwich to brighten up the visuals on your screen. In a traditional LCD television set, light-emitting diodes (or LEDs) function as a backlight which then transmits the image through an LCD screen. In QLEDs, a thin quantum-dot layer is placed between the LED backlight and the LCD screen that purifies the colour from the LED source to transmit colour that is noticeably vivid. The light is plainly transmitted through the different layers, making the technology known to be ‘transmissive’.
OLEDs – Organic Light-Emitting Diodes
While QLEDs are ‘transmissive’, OLED TVs are ‘emissive’ in nature for their light diodes are capable of producing their own light. This also means they can be individually turned off as well.
Naturally then, OLEDs do not need a backlight to produce light or an image hence. A bright coloured pixel and an absolute black one can appear next to each other without affecting the other.
OLED vs QLED
Better contrast and black level
A crucial factor that determines image quality is the black level in your TV. Since every individual pixel can be turned completely off in OLED TVs, they are able to reach deeper blacks that result in infinite contrast levels – just what you need for night scenes. In traditional LED/QLED TVs, the LEDs can never be turned fully off, so they rely on dark greys to simulate black which result in glares in low-light and night scenes.
Lightweight, width and viewing angles
With an additional layer in QLED TVs, they don’t tend to be as thin and light as OLEDs which do not come with an LCD layer. The inclusion of the LCD-based display means different parts of the screen appear duller/brighter than other parts. Not the case with OLED which provide fantastic views from all possible angles.
While OLED trumps in contrast levels, QLEDs are brighter owing to the quantum-dot filter. This makes QLEDs a better choice for living rooms with high ambient light.
Because the pixels in OLED TVs can be individually turned on and off, they are very quick to change colour. Something that you would want while gaming or watching sports and action movies, where images change in split seconds.
What is best for you?
If budget is not a problem, then an OLED – with their natural colours, thinner panels and exciting contrast – is the way to go. If you are looking at a smart bang for the buck then QLEDs will not disappoint either, especially with their sizes being larger for a lesser price when weighed up with their OLED counterparts.