ColourSpace can be integrated with LG WOLED TVs for accurate SDR Closed Loop display profiling and calibration.
- ColourSpace INF/XPT/PRO/CAL/LTE & HTX/HTP/HTL
- Closed Loop Profiling
- 3D LUT
- High-level accuracy
- DeviceControl Management
Compatible LG TVs for LUT based SDR calibration include the 2022 C2/G2/Z2, 2021 C1/G1/M1/R1/Z, 2020 BX/CX/GX/WX/ZX, 2019 B9/C9/E9/W9/Z9/R9, and 2018 B8/C8/E8/G8/W8, and 2017 B7/C7/E7/G7/W7 models with Technicolor Studio Firmware.
(Note: A1/A2 and B1/B2 models are presently not supported, and capabilities can vary within the other LG models, due to TV model firmware variations.)
HDR and Dolby Vision is supported only on models with such calibration capability.
LG TV operation and function is controlled via the Hardware Options menu, accessed via the Profiling window.
- Connect the LG TV to the same network as the ColourSpace laptop, and start ColourSpace
- Set the desired ColourSpace set-up options via the Settings menu, as required
- Open a Profiling window, select Hardware Options, and select LG from the Hardware drop-down list
- Enter the TV's required IP address, and select Connect
- Select the required Profile for calibration, as well as the Load LUT, and Colour Space
(Note: The selected parameters will not be auctioned or configured on the LG TV until a Unity Bypass has been Uploaded)
- To make sure there is no existing calibration data active within the selected Profile/Load/LUT/Slot, and associated colour space selection, etc., select Unity Bypass from the Select LUT option, and press Upload
(The use of Unity Bypass Upload sets the TV into Calibration mode, including setting the selected Profile slot, and disables selected TV on-screen controls, as defined below)
- If required, the TV's Brightness, Contrast, Colour, and OLED Light can be adjusted using the Interactive Controls while taking interactive measurements via the Manual Measure menu
(Note: The internal TPG is not affected by these controls, and altering them from their default may have unexpected consequences)
- The Reset Picture Mode option can be used re-set the selected Profile and associated LUT and colour space options to the TV's defaults, where possible
(Ensure you are aware of any Reset limitations with your specific LG TV model before commencing with any calibration)
When Calibration Mode is enabled, for example via Unity Bypass Upload, different internal TV parameters can also be affected depending on the Load options selected. Because of this, some TV setting may require a manual reset/change via the TV's OSD, after Calibration Mode has been enabled.
While LG TVs can be calibrated using ColourSpace via a LUT upload, the actual profiling should ideally be performed via a an external patch generator, due to the internal TPG not being bit accurate.
- Open a second ColourSpace Profiling window, select Hardware Options, and select the required TPG from the Hardware drop-down list
(Refer to the relevant TPG User Guide for further operational information)
- The probe must be connected to the same Profiling Window as the TPG
Any patch generator can be used for profiling, including direct HDMI/DVI/DisplayPort connection from the ColourSpace laptop.
Note: (W)OLED displays can suffer from burn in, especially at high luminance. For this reason windowed patterns should not be used for extended periods of time on any LG WOLED.
HDR & Dolby Vision Setup
The LG HDR and DoVi Options menu provides a set of controls for HDR Tone Mapping and DoVi configuration.
- The Profile options will enable relevant HDR capabilities when a valid HDR selection is made
(In conjunction with the required TPG metadata, or separate HDR source being played in the background)
- Within the HDR Tone Mapping tab, Peak Luma (Nits) option enables the measured white value to be set manually, or via the > button
- The Peak 1/2/3 options provide manual entry for different Tone Mapping values, based on the Mastering Peak Luma, and the Roll off start point as a percentage of the TV's Peak Luma (Nits) value
- The Upload button uploads the defined values
- The Profile options will enable relevant DoVi capabilities when a valid DV selection is made
(In conjunction with the required TPG metadata, or separate Dolby Vision source being played in the background)
- Within the DoVi tab, the EOTF option enables manual entry of the desired EOTF value
- The Luma, Red, Green,Blue and White options provide manual entry for measured peak values, and can be automatically populated from the present measured values within the active profile via the Update box
- The Upload button uploads the defined values as a DoVi config file
(Note: Depending on the LG TV model the use of a direct upload may negate the possibility of using Reset Picture Mode to reset Dolby Vision settings)
- The Save button enables the DoVi config file to be saved and uploaded to the LG TV via USB stick, if required
(Note: The exported config file may need to be renamed, depending on the specific LG TV model requirements)
After profiling, a Calibration LUT can be generated as normal within ColourSpace LUT Tools, and saved into the library.
With the LUT still held within ColourSpace navigate back to the Hardware Options menu, and select the desired LUT from within the Select LUT options, and Upload into the desired Picture Profile.
There are two LUT slots available with the LG TV, with the 3D option used in isolation being the normal configuration to use for display calibration.
(Note: The use of 1D LUTs within LG TVs can potentially cause calibration issues, and is not presently recommended.)
When both a 1D and 3D Unity Bypass Upload is performed, selected TV on-screen controls, such as Gamut & Gamma, as well as white balance, will be disabled, depending on the LG TV model, and the processing set to bypass as the functions will be defined and managed by the calibration LUTs.
When either a 1D or 3D Unity Bypass Upload is performed in isolation, the disabled TV controls will depend on the LUT option uploaded, as well as the LG TV model.
When using both the 1D and 3D LUTs in combination, the 1D LUT can be used to pre-set a display's greyscale and/or gamma as a first pass, and then the display can be re-profiled with the back 1D LUT active, and the 3D LUT generated from the second profile pass uploaded to the 3D LUT option for the final gamut calibration.
(Note: If using a 3D LUT in conjunction with a 1D LUT, it is imperative Unity Bypass Upload is performed for both 3D and 1D Load options before any profiling is performed, and the 1D LUT is uploaded before profiling for the 3D LUT is performed, due to the 1D LUT being after the 3D LUT.)
Alternatively, the 1D option can be used in isolation, without first performing a 3D LUT Unity Bypass Upload, and will leave access enabled to the TV's internal gamut management and leave associated signal path processing active, allowing just the 1D LUT to be modified in conjunction with selected TV controls and settings.