All versions of the Display/i1D3 tristimulus probe work with ColourSpace, and work with most display systems using contact and non-contact modes.
- ColourSpace INF/XPT/PRO/CAL/LTE & HTX/HTP/HTL & DPS/ZRO
- Calibrite - All Models
- i1Display Pro - All Models
- C6 & C6HDR2000
As with all probes, operation and function is controlled via the Probe Options menu, accessed via the Profiling window, with the left-hand side of the menu providing generic probes settings, and the right-hand side settings specific to the Display/i1D3.
The Settings options provide specific Display/i1D3 configurations.
Integration Time sets the maximum time taken for any given single measurement, in seconds.
The Display/i1D3 will often take more than a single reading, depending on the Sync Mode selected, and the brightness of the patch being measured, even without Intelligent Integration being enabled.
There is no default setting, as different values will be required depending on the display being profiled, with longer values generating more accurate and stable readings.
The drop-down Sync Mode option is used to set the mode to best match the display refresh/sync operation.
With original iterations of the Display/i1D3 only Frequency and Period modes are available, and selection of AIO will generate an error warning.
Frequency mode is best suited to displays that have an inherent low-frequency flicker, as with CRT displays and some LCD displays, specifically with CCFL backlights, and plasmas. At very low-light levels precision will be reduced, unless the integration time is set to a high value. Intelligent Integration should be used for this.
(Frequency mode measures the number of flicker pulses over the set Integration Time, normalising the result. Under normal operation, and dependent on patch brightness, a minimum of 2 to 3 reads per patch will be performed, effectively doubling, or even tripling the set Integration time.)
Period mode is best suited to displays that do not flicker, or flicker at a very high frequency, above than 5000Hz. On such displays this mode will have higher precision at very low-light levels.
(Period mode measures the time between a set number of flicker pulses, within the set Integration Time, and is the preferred mode for most modern displays, and may take multiple readings depending on patch brightness.)
AIO mode is a combination of Frequency and Period modes, and works with all displays of any given flicker/frequency, as it tries to swap between Frequency and Period modes as required.
(While AIO mode may appear to be the better option, for most displays Period mode, with Intelligent Integration, will often provide more accurate results on modern displays.)
Note: When the Display/i1D3 probe attempts to measure levels below its minimum capability it may return measurement data that is generic/inaccurate, depending on the Sync mode selected.
The Cor. Files drop-down menu provides access to any pre-set correlation files held within ColourSpace, with a WOLED correlation file included as an example. The example file can be used on WOLED TVs and monitors, and has been generated from data supplied by FSI from their XM55U monitor, using the same glass as used in 8 series LG WOLED TVs.
Correlation files are simple .csv files, with a minimum of 3 lines/rows, with each line being 401 floating point values.
The values need to be 380nm to 780nm in 1nm increments, in Watts per Nm. If available data only goes to 730nm, pad with zeros.
Different correlation files can be downloaded from DisplayCalibrations.com, with new Cor. Files being added continuously to those available for different display technologies. The Cor. Files should be installed into the i1D3 Support Files folder within the ColourSpace installation folder.
Note: Matrices or correlation files should not be relied on for calibration accuracy - the use of Probe Matching to a Spectro is always recommended, using ColourSpace's unique FCVM or MPVM probe matching.
Intelligent Integration set a nits value below which the i1D3 will perform a second, third, fourth, etc. reading, with increasing integration times, up to the maximum integration time of 6 seconds. The readings will stop as soon as a stable and valid reading is achieved. If no valid and stable reading is achieved a zero value will be returned, enabling ColourSpace to intelligently calculate a replacement value when generating a calibration LUT.
Average Low Light
Average Low Light averages multiple readings in low-light situations using an advanced algorithm built into ColourSpace. The algorithm varies based on the probe in use to provide the best possible results.
Average Low Light should not need to be used when Intelligent Integration is active.
Enable Visible Feedback
Enable Visible Feedback enables the Display/i1D3's LED, providing feedback on the status of the probe - idle, or taking measurements.
The LED will not match every measurement when readings are fast.
The probe's included ambient light diffuser can be used for taking ambient light measurements, or potentially for directly measuring projector light output from the lens. Be aware, all measurements made with the diffuser in place are approximate, and not in any way accurate.
Note: For accurate calibration, projector profiling should always be from the screen, not direct from the projector lens.
For monitor profiling the diffuser should not be used.
Probe Adjustments are generic probes settings, with consistent operation regardless of the probe in use.
Probe Matching is used to match a Tristimulus to a Spectroradiometer, increasing the profile accuracy.
There are two different methods available for probe matching - 4 Colour Volumetric Matching (FCVM), and Multi-point Volumetric Matching (MPVM).
ColourSpace doesn't use the older, traditional, 4 Colour Matrix (FCMM) Method for probe matching, as the volumetric approach offers far greater probe matching accuracy.
Probe Offset enables a user to manually enter offset values for different probes/display combinations.
Perceptual Colour Match is a preferable approach.
Extra Delay sets a delay time after the patch has changed before probe measurement starts, and can be set automatically via the Auto button, and manages signal path delays in the image pipeline.
When using the Auto option, Average Low Light and Intelligent Integration should not be enabled.