Samsung S90C 65" SDR Calibration Overview
The Samsung S90C is a high-end UHD (3840x2160) QD-OLED TV from Samsung, offering superior contrast, vibrant colors, and excellent HDR performance. The display is a popular choice for home theater and color suites (as a large client/review display) where Dolby Vision content is not required.
Below is an overview of the performance of the 65" model before and
after professional Samsung S90C calibration.
A 3D LUT calibration was done and the resulting cLUT was then activated in DaVinci Resolve as a monitoring LUT, the Samsung S90C does not have internal LUT storage.
Equipment, software and target used in the calibration:
- Calibration software: DCM
- Colorimeter: K-10-A
- Spectro: CR-300
- Patch generator: DaVinci Resolve, SDI out
- Calibration target: Rec 709 D65 G2.4 110 nits (SDR)
- LUT holder: DaVinci Resolve 33^3 (tetrahedral)
Native Gamut
This is the native gamut (before calibration) of the Samsung S90C compared to the Rec 709 color space calibration target. The display's native gamut fully covers the target color space, making it ideal for precise display calibration.
White Point
This is a close-up of the native white point (before calibration) compared to the calibration target of D65. It shows significant deviation from target and a blue tint. The display has bias/gain CMS controls to manually adjust lower/upper Greyscale, if desired.
RGB Balance
This is the Greyscale RGB balance before calibration, it has a strong blue tint.
EOTF: Gamma
This is the native gamma and luminance response of the Samsung S90C. The reference line is configured for the calibration target of G2.4. In its default native state, the display's brightness is significantly higher than the calibration target.
Spectrum Analysis
This is the spectrum of the Samsung S90C in native gamut for full white, with the red, green and blue primaries spectral output overlaid to identify color channel issues. The R, G, B color channels closely match the white response, this is ideal and one of the key advantages in HDR of QD-OLED over WOLED.
Calibration
After display preparation and configuration, a large display profile is run to create a detailed characterization of the display. From that profile data, a 3D LUT is then generated by DCT and activated in Davince Resolve as a monitoring LUT with tetrahedral interpolation (most accurate).
Gamut & White Point (post)
Gamut (post calibration) compared to the Rec 709 D65 target - both color space and white point are on target.
RGB Balance (post)
This is the Greyscale RGB balance post-calibration, an excellent result.
EOTF: Gamma (post)
This is the gamma and luminance response of the Samsung S90C after calibration compared to the reference calibration target G2.4. The display now tracks the reference very closely.
Color Error: delta E 2000 (post)
These are the dE 2000 stats post calibration for a 1,100 point stress test validation profile. With an average dE 2000 color error of only 0.31, the Samsung S90C now performs reference grade given that the JND (just noticeable difference) for human vision is set at a dE 2000 value of 2.3.
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