Touch Accuracy Offset

Touch Accuracy Offset

Overview

After achieving optimal touch performance and completing calibration, you may notice a touch accuracy offset—where the physical touch position does not match the location shown on the display.

This issue is usually caused by display scaling or resolution mismatches, not by the touch sensor itself. Follow the steps below to correct it.



Step 1: Check GPU Scaling Settings

Display scaling applied at the graphics card level can shift touch coordinates.

Example: NVIDIA Graphics Cards

  1. Open NVIDIA Control Panel

  2. Go to Display → Adjust desktop size and position

  3. Set Scaling to No scaling

  4. Click Apply


⚠️ Any GPU-side scaling (Aspect ratio, Full-screen, Custom scaling) can cause touch offset issues.

Step 2: Verify Windows Advanced Display Settings

Ensure Windows is using consistent resolution and refresh rate values.

Steps

1. Right-click on the desktop and select Display settings


2. Select the correct display (if multiple monitors are connected, ensure they are in Extended Mode)


3. Under Related settings, click Advanced display:



3. Confirm that Desktop mode and Active signal mode show the same resolution and refresh rate:


If the Values Do Not Match

  1. Click Display adapter properties

  2. Select List All Modes

  1. Choose a different resolution and refresh rate, then click OK
  1. Repeat the step and select the desired resolution and refresh rate
  2. Click OK to apply
This refreshes the display pipeline and often resolves scaling mismatches.

Final Step: Test and Recalibrate if Needed

  • Test touch accuracy again

  • If a small offset remains, perform a new calibration in DISPLAX Connect

Summary

Touch accuracy offset issues are almost always related to GPU scaling or Windows display mode mismatches. Ensuring 1:1 scaling and matching display modes will restore accurate touch alignment.

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