Gain & Threshold
How to Fine-Tune DISPLAX Sensors: Gain and Threshold
Fine-tuning your DISPLAX touch sensor ensures smooth, accurate, and stable touch performance.
Two key settings must be adjusted: Gain and Threshold.
What is Gain?
Gain controls the signal strength sent from the Touch Controller to the Touch Sensor.
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Range: 0 to 7
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Higher Gain = stronger signal
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Use higher values for thicker glass or larger sensors
💡 Think of Gain like a “volume knob” for the sensor signal — the thicker or larger the setup, the louder (stronger) it needs to be.
What is Threshold?
Threshold defines how sensitive the sensor is to touch.
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Range: 0 to 50
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Higher values make the sensor more sensitive
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Lower values make it less sensitive (reduces noise and false touches)
💡 Think of Threshold as “touch detection strictness” — the lower it is, the harder you must touch for detection.
Step-by-Step Adjustment Guide
Start with Gain = 0 and Threshold = 0.
Wait 2 seconds after changing Gain before touching the screen.⚠️ The “Do not touch” message means the new Gain setting is being applied.
Increase Gain and Threshold gradually together.
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After each adjustment, test the touch by dragging your finger across the display.
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The goal is to achieve smooth and continuous movement without interruptions.
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Avoid high values.
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Very high Gain or Threshold may cause electromagnetic interference (EMI) or reduce accuracy.
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Use only the lowest combination that gives stable and reliable touch detection.
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Test the entire sensor surface.
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Check both the center and edges for consistent touch tracking.
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If you notice breaks, slightly increase both values together and test again.
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Goal: Achieve a stable, accurate touch response using the lowest possible Gain and Threshold values, minimizing EMI and ensuring long-term performance.
What Is Considered Good Touch Performance?
Good touch performance means the sensor detects every touch smoothly, continuously, and accurately, even when dragging across the entire display — center and borders — without interruptions or false touches.
⚠️ Note:
Once good touch performance is achieved but false touches are still detected, check the Shield feature for potential electromagnetic interference (EMI) issues.
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