Yes, you can get confirmation that the 65" version of the Samsung S90D available in Europe and Switzerland uses a QD-OLED screen. Unlike other sizes such as 48", 55", 77" and 83" which use conventional OLED screens, the 65" models in the S90D series in Europe are equipped with QD-OLED panels.
Best picture ---> OLED and is bright enough, at least in my opinion. (I have the balcony directly on the side of the S90D --> 0 problems)
Mini-LED unfortunately still has a "glow" and blooming.
I recommend the S90F or S95D. The S90F is also in Black Friday right now!
The S90D has problems with the sound (google muffled sound) and arrived with me twice forgiven (as with reviewers).
The 83« model uses a classic OLED panel, not a QD-OLED panel. Only the 65» version of this series has a QD-OLED screen, while the 83" and other sizes have a traditional OLED panel similar to LG's WOLED technology. This is confirmed by Samsung's specifications and regional model variations.
It is not possible to connect a wireless headset with a USB transmitter directly to the TV, as the Samsung S90D does not provide specific support for such USB headset transmitters. Instead, you can use Bluetooth headphones that can be paired directly with the TV. The S90D supports connection with up to two Bluetooth headphones simultaneously, providing a convenient solution for wireless audio output.
The Samsung S90D OLED TV supports Dolby Atmos for an immersive sound experience. However, it does not come with a built-in Dolby Atmos sound system like a dedicated soundbar. For enhanced Dolby Atmos sound, pairing it with a compatible soundbar is recommended. The TV itself features a 2.1 channel speaker system with 40W output, but for a full Dolby Atmos experience, additional equipment is needed.
The Samsung QE77S90DAEXZU uses OLED technology, not QD-OLED. OLED stands for Organic Light-Emitting Diode, which allows for individually controlled pixels to produce pure blacks and bright whites, enhancing contrast and picture quality. QD-OLED, on the other hand, combines quantum dots with OLED technology, but this specific model does not use QD-OLED.