Sunday, March 20, 2022


The main upgrades on the Samsung QN90B vs QN90A are the improved video processing, and the inclusion of a Dolby Atmos decoder. The QN90B utilizes 14-bit luminance scale, as opposed to 12-bit on the QN90B. The 14-bit video processing increases the precision of the local dimming algorithm (and various other picture enhancements) so that the QN90B is able to reveal more details in dark shadows and bright highlights, without causing significant amount of blooming or halos. The Shape Adaptive Light technology found on the QN90B also plays a role in the local dimming (and boosting) being more accurate in comparison to the QN90A which lacks this technology. The 144Hz refresh rate is only supported by the 50-inch class QN90B model.

Samsung QN90B Samsung QN90A
Model Year 2022 2021
Size class 50"; 55"; 65"; 75"; 85" 43"; 50"; 55"; 65"; 75"; 85"; 98"
The Samsung QN90B currently lacks both the smallest and the largest options of the QN90A range: the 43-inch and the 98-inch class, respectively. The remaining size variants are identical between the QN90B and QN90A.
Resolution 4K (3840x2160)
Display Type LCD
Despite the use of quantum dots (for color enhancement) and Mini LED backlight, the underlying technology is still LCD (Liquid Crystal Display) since the Samsung QN90B and QN90A utilize VA (Vertical Alignment) type of panels.
Backlight Type Quantum Mini LED (Full-array)
The Mini LED backlight on the Samsung QN90B and QN90A consists of thousands of miniature LEDs that are approximately 1/40th the height of a typical LED modules such as the ones used in 2020 Samsung UHD TVs. The Mini LEDs feature a micro layer that enables them to emit and disperse light on their own, without an additional lens that standard LEDs need for dispersing light. As a result, a higher-density backlight can be achieved through the use of Mini LEDs.
Local Dimming Yes (Quantum Matrix Technology)
The Quantum Matrix Technology is used by both the QN90B and QN90A for controlling the Mini LEDs. The two Samsung TVs are able to dim the backlight in dark areas of the image (thus improving black level) while allocating electrical power towards the Mini LEDs behind bright areas so that highlights are boosted. Furthermore, the Quantum Matrix Technology can also heighten the sense of depth by increasing the light in foreground objects while darkening the background. Thanks to their Mini LED backlight, the Samsung QN90B and QN90A are able to accommodate considerably higher number of individually controlled zones in comparison to full-array TVs with traditional-sized LEDs. There is a difference in the precision of the local dimming, however.
Shape Adaptive Light control No
The Samsung QN90B features the Shape Adaptive Light control in order to adjust the shape of light from the Mni LEDs to match shapes and surfaces in the content you're watching. This allows objects with various shapes to be rendered with increased luminance without causing any significant amount of picture artifacts such as blooming or halos.
Luminance Scale (HDR Mapping) 16,384 levels (14-bit) 4,096 levels (12-bit)
The Samsung QN90B is able to adjust brightness across 16,384 steps, or 4 times more than the QN90A's 4,096 steps. As a result, the local dimming algorithm (and other image processing techniques) can operate with increased precision on the QN90B vs QN90A which leads to significant improvement in the picture quality in some very challenging areas such as near-black gradation, shadow (and highlights) details.
Dynamic Range Quantum HDR 32x*
*Except for the TVs in the 50-inch class and below since they have Quantum HDR 24x. The difference between the Quantum HDR 32x and Quantum HDR 24x is mostly down to the higher peak brightness in small highlights which can reach up to 2,000 cd/m2 for the TVs in the 55-inch class and above whereas the two smaller sizes (namely: the 43-inch and 50-inch class) are limited up to 1,500 cd/m2.
Color 10-bit depth; 100% Color Volume
In addition to the QN90B and QN90A being capable of displaying over a billion color shades (thanks to their 10-bit panels), the utilization of quantum dots (and the narrow spectral peaks of pure primary colors it provides) allows them to cover the DCI-P3 color space entirely at different luminance levels, which Samsung calls "100% Color Volume".
Processor (& features) Neo Quantum Processor 4K
The Neo Quantum Processor 4K provides both the QN90B and QN90A with features such as AI Upscaling which uses deep learning to analyze lower resolution sources, and produce algorithms for their optimal upscaling.
Real Depth Enhancer Contrast Enhancer
The Real Depth Enhancer, however, can only be found on the Samsung QN90B. Therefore, this model has an advantage in terms of determining which object is in the foreground and, by increasing the contrast therein, the QN90B is also able to heighten the sense of depth as well. The QN90A, on the other hand, has the standard contrast enhancer.
Refresh Rate 120Hz*
*Except for the 50-inch class QN90B model which supports up to 144Hz with three different Screen Ratio settings in the Game Bar: 16:9 (1920x1080 and 3840x2160 @144Hz); 21:9 (2560x1080 and 3840x1600 @144Hz); 32:9 (3840x1080 @144Hz).
Input Lag ~10ms (@60Hz); ~6ms (@120Hz)
The 50-inch class QN90B model can achieve even lower input lag (of less than 5ms) when in 144Hz mode.
HDMI 2.1 4 out of 4 1 out of 4
Unlike the QN90A, which has only 1 HDMI 2.1 port (with the remaining three being HDMI 2.0), all the HDMI inputs on the QN90B are version 2.1.
Anti-Reflection Yes
The Samsung QN90B and QN90A have identical reflection handling.
Viewing Angle Ultra Viewing Angle (55" and above)
The 50-inch class TVs from the QN90B and QN90A series lack this layer aimed at improving otherwise limited viewing angles on a VA panel based TVs. It should be said that the layer providing the Ultra Viewing Angles on the larger size variants in the Samsung QN90B and QN90A series also causes a slight raise in the black level (so the native contrast ratio is lower than what you'd expect from VA panel) but the local dimming is able to not only offset that but also further improve the black level and contrast ratio.
Audio 4.2.2-ch (55" and above); 2.2ch (50"); 2ch (43")
The speaker configuration varies with the size. The larger size variants (in the 55-inch class and above) have a 4.2.2-channel system and 60 Watts of audio power output. The 50-inch class TVs from the QN90B and QN90A series utilize a 2.2-channels system with sound power output of 40 Watts. Finally, the 43-inch class QN90A has 2-channel speakers and 20 Watts of power output.
Dolby Atmos built-in No
Even though both series are equipped with the Object Tracking Sound+ (in the 55-inch class and above; smaller sizes have a lite version of this technology) in order to match the sound emanating from the built-in speakers with the on-screen action, the QN90B also has a Dolby Atmos decoder so that such soundtracks can be played directly via the TV speakers.
EyeComfort Mode Yes No
The Samsung QN90B is able to automatically adjust the brightness and color temperature based on the time of day and surrounding light. For example, it can automatically lower the the brightness and select warmer color temperature during night time.
Pricing & Availability Samsung QN90B Samsung QN90A
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