LG Monitors

ColourSpace Integration

LG UltraFine monitor operation and function is controlled via the Hardware Options menu, accessed via the Profiling window.

Initial Setup

Both SDR and HDR calibration of LG monitors is supported. All Picture Modes are available, and can be accessed - but the Calibration Picture Mode can only be used for HDR calibration, as the Auto Brightness Limit function is enabled by default.

Connection Issues

• Connect the LG monitor to the ColourSpace laptop via the monitor's USB-2 connector (the square connector, not any other USB connector), as well as a direct video connection with valid signal, 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 Pro from the Hardware drop-down list
• Select Connect
• From the LG Pro Options, select the required Picture Mode for calibration
  (The Calibration Picture Mode is only for HDR calibration)
• To make sure there is no existing calibration data active within the selected Picture Mode, select Unity Bypass from the Select LUT option, and press Upload
• For HDR calibration, set the Peak Brightness mode as required - Normal, High, or Very High
  Note: OLED monitors can suffer from burn in, especially at high luminance levels
• Set the monitor's actual Peak Luma using the Interactive Controls while taking interactive measurements via the Manual Measure menu
  (The desired target value will depend on the accuracy of the white point colour temperature)
• Using Calibration Patches select the desired patch option to use for profiling
  (If possible, Automatic uses the patch settings defined within the ColourSpace Settings window, or else the closest available patch settings)
  Note: the keyboard 'O' key can be used within the Manual Measure and Hardware menus to quickly Disable/Enable the TPG

Potentially, when Unity Bypass data is Uploaded all monitor settings will be nullified. Should it be desired that different LUTs and other settings remain as defined, upload a the Default Unity LUT, which uploads just the LUT, and does not reset any additional settings. Set necessary settings, such as Brightness/Contrast/Black-Level, before any LUT Upload.

Calibration Limitations

Any available Picture Mode can be calibrated, with SDR modes being for SDR, and HDR for HDR. The Calibration mode is only suitable for HDR calibration, and is the only mode that can be directly calibrated to a PQ EOTF or HLG, as the preset HDR modes use a power law 2.2 gamma EOTF, and apply a preset PQ EOTF and Tone Mapping.

After calibration, the selected Picture Mode will be be locked-out of further adjustments from the on-screen GUI, etc.

To enable GUI access again, the Picture Mode will will need to be reset via the monitors GUI menu, or potentially a factory reset.

The pre-set (HDR) Picture Modes are based on calibration to a power law EOTF, using a Gamma 2.2 value, with the peak Luminance being set to an expected value depending on the Peak Brightness option used. After calibration to Gamma 2.2, a preset PQ conversion is applied, including Tone Mapping roll-off
Using the Calibration Picture Mode, a standard PQ HDR EOTF calibration can be performed, with Tone Mapping applied, or not, within ColourSpace LUT Generation, as normal.

Profiling Operation

To profile the LG monitor with ColourSpace navigate to the desired profiling mode - Manual Measure or Display Characterisation.

If using the iTPG, the screen of the LG monitor will mimic the colour displayed within ColourSpace.

As soon as a Calibration Patches selection is made the LG monitor will show the patch colour as defined within the ColourSpace Manual Measure menu.

Profiling can then be performed as normal, using the probe connected to ColourSpace, and with the LG screen displaying the required patches.

Alternatively an external TPG can be used.

• 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 SDR profiling, including direct HDMI/DVI/DisplayPort connection from the ColourSpace laptop, with HDMI to SDI converter if required. For HDR/HLG/Dolby Vision, if applicable, correct metadata may be required within the video signal, requiring a dedicate TPG or metadata injector, unless the display can be manually forced into the required input format.

From the Probes Options menu it is possible to select the internal optional LG Probe from the available probes list. ColourSpace will then use the internal probe for patch measurements.

LUT Upload

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 Mode.

Calibration Guides

3D LUT Calibration Manual Calibration