LG 27BP95E SDR Calibration Overview

The 27BP95E is a 27-inch UltraFine™ RGB OLED Pro 4K monitor from LG, designed for professional video editing and color-critical tasks. It features a 3840 x 2160 resolution OLED panel, delivering deep blacks and vibrant colors with a 1,000,000:1 contrast ratio.

The LG 27BP95E is a popular choice in the professional display market, ideal for color suites that require a Grade A display for SDR content.

Below is an overview of the display's performance before and after professional LG 27BP95E calibration.
A 3D LUT calibration was done targeting a Judd alternative white point (AWP), as these JOLED panels trigger metamerism in observers. The resulting cLUT was then loaded into the BMD Micro Converter LUT box.

Equipment, software and target used in the calibration:

  • Calibration software: DCM
  • Colorimeter: CR-100
  • Spectro: CR-300
  • Patch generator: DaVinci Resolve, SDI out
  • Calibration target: Rec 709 AWP G2.4 100 nits (SDR)
  • LUT holder: BMD Micro Converter 33^3

Native Gamut

This is the native gamut (before calibration) of the LG 27BP95E 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.

LG 27BP95E SDR native gamut pre calibration

White Point

This is a close-up of the native white point (before calibration) compared to the AWP calibration target. It shows significant deviation from target and a magenta tint.

LG 27BP95E SDR white point pre calibration

RGB Balance

This is the Greyscale RGB balance before calibration, it has a magenta tint.

LG 27BP95E SDR RGB balance pre calibration

EOTF: Gamma

This is the native gamma and luminance response of the LG 27BP95E. The reference line is configured for the calibration target of G2.4. In its default native state, the display's brightness is already close to the calibration target.

LG 27BP95E SDR EOTF gamma tracking pre calibration

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 loaded into the BMD Micro Converter LUT box.

Gamut & White Point (post)

Gamut (post calibration) compared to the Rec 709 D65 target - both color space and white point are on target.

LG 27BP95E SDR gamut & white point post calibration

RGB Balance (post)

This is the Greyscale RGB balance post-calibration, excellent result.

LG 27BP95E SDR RGB balance post calibration

EOTF: Gamma (post)

This is the gamma and luminance response of the LG 27BP95E after calibration compared to the reference calibration target G2.4. A noticeable improvement, the display now tracks the reference extremely close.

LG 27BP95E SDR EOTF gamma tracking post calibration

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 0.28, the LG 27BP95E now performs exceptionally well given that the JND (just noticeable difference) for human vision is set at a dE 2000 value of 2.3.

LG 27BP95E SDR delta E stats post calibration for stress test validation profile


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