LightSpace Connect User Guide

LightSpace Connect enables LightSpace CMS to be used to measure and profile mobile phone screens, tablets, and connected TVs, monitors and displays, enabling users and manufacturers alike to verify screen capabilities.

Using Screen Mirroring any variations between a TV's HDMI inputs and direct streaming can be compared to assessed any differences.

The following instructions are for the use of LightSpace Connect on Android and iOS devices with LightSpace CMS.


LightSpace Connect Overview

LightSpace Connect Profiling

LightSpace Connect is an Android and iOS App that enables the generation of calibration patches for the measurement and profiling of any Android or Apple mobile phone or tablet screen, as well as any TV or other display/monitor through the use of Screen Mirroring, MHL Cable, AirPlay, Apple Digital AV Adaptor, Fire TV & Google TV devices, etc.

As LightSpace Connect is controlled directly by LightSpace CMS it can generate any required colour patches, either as a managed sequence for automated profiling, or manually selected for manual display calibration adjustment.


Initial Operation

In the App Store or Play Store search for 'LightSpace Connect', and select and install. When installed, tap on the LightSpace Connect icon to open the app.

When open, the app will initially show a splash screen, and then swap the the main 'connect' page, ready to connect to the LightSpace CMS PC.

LightSpace Connect Network
  • Open LightSpace CMS on the LightSpace PC.
  • Select the 'Network Manager' menu within LightSpace, which controls synchronisation with LightSpace Connect.
  • Set the desired parameters for patch size/position, background colour, and any required Extra Delay Time.
  • Select Enable to active the Network Manager.
  • Note the displayed Server IP address.
    (The Port number can be altered if needed, but is rarely necessary.)

The Network Manager menu is located within the top-level icons of LightSpace CMS.

The Patch Indent/Size controls within the LightSpace Network Manager can be used to set any specific patch size and position for display profiling.

Using these percentage numerical boxes it is a simple process to set the required values for any given patch size and position, be it a percentage of screen width/height, or screen area (or patch diagonal size).

LightSpace Connect Network
  • If the LightSpace Connect device and the LightSpace PC are on the same WiFi network the correct IP address will be entered automatically.
    (Note: If the correct IP address is not entered automatically manually type in the network IP address that LightSpace CMS lists in the 'Server IP Addresses field.)
  • Press/click 'Connect' to connect LightSpace Connect to LightSpace CMS.
    (The LightSpace Network Manager will now show '1 available client/s'.)
  • LightSpace Connect will show an initial patch, with title bar.
    (To remove the title bar tap/click the screen, and tap/click to bring it back.)
  • Close the LightSpace CMS 'Network Manager' window.

LightSpace connect is now ready to mimic any patch colour selected within LightSpace CMS.


Profiling Operation

To activate the LightSpace Connect patch generator navigate to the desired profiling mode within LightSpace CMS - Calibration Interface, or Display Characterisation.

When the patch window is activate within LightSpace (the LightSpace CMS internal floating patch window has been made active by clicking the small colour display box when using Quick Profiling or Manual Measure modes) the LightSpace Connect patch generator will mimic the colour displayed within LightSpace CMS.

Profiling can then be performed as normal, using the probe connected to the LightSpace CMS PC, with LightSpace Connect displaying the required patches on the mobile device screen, or connect TV/display/monitor.

LightSpace Connect Workflows

Patch Indent/Size & Extra Delay

The Patch Indent/Size & Extra Delay controls within the LightSpace Network Manager can be used to set any specific patch size and position for display profiling, as well as a delay for probe measurement.

Note: The Patch Size/Indent options are a 'work-in-progress'...

The 'Diagonal' box enables the selection of patches based on the ICDM Lxx sizes, which are defined as a percentage of the screen diagonal size. The 'Area' box shows the equivalent screen area percentage for the selected patch. It is possible to enter the desired area percentage manually.

The 4 indent values are also in percentage terms, and can be used to set a Custom width and height of the patch window, as well as the position.

To reposition the patch you simply add/subtract the same value from the apposing percentage boxes, which will reposition the patch, while maintaining the same patch size.

The 'Extra Delay Time' setting is duplicate of the same setting with the 'Options' menu, as allows for a delay time in seconds to be set before the probe starts reading after a patch change has occurred. This is required when using an external patch generator (such as LightSpace Connect) with an in-built delay, meaning the patches on the display being profiled occur out of sync (delayed) with respect to the patch changes within LightSpace. Such a delay is easy to see visually, and a corresponding value entered to counter the visual delay.

Note: If using an external patch generator that has no understanding of patch size and/or background colour, set the Indent/Size controls to 0%, and keep the Background Colour set to the default black.


TV Legal Profiling Workflows

Some LightSpace Connect devices (such as Chromecast) may need rescaling for TV Legal ranges when profiling. This can be performed using the 'Active LUT' function within LightSpace to re-scale the colour patches correctly using a 64-940 rescaling LUT, either made via the 'Edit/LUT Manipulation/Append/1023->64-940' function, or through use of the 'LUT Image' for external LUT manipulation, applied to a bypass LUT made via 'File/New'.

Note: To gauge if a rescaling is needed use the 'Calibration Interface' menu, and use the 'Patch Colour' function to toggle the IS-mini patch output colour between the Black patch [000] and Grey [013]. If there is NO visible or measurable difference between the two patches a rescaling will be required as the output signal is being clipped.

Additional Technical & Support Info.

Additional Software Required: LightSpace CMS
LightSpace CMS Demo: Downloads

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