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Palm Rejection

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Palm Rejection

The Palm setting enabled instructs the Touch Sensor to ignore touches from objects with dimensions larger than a finger, such as a hand or an arm. The rejection area can be configured and is conditional to the Touch Sensor size.
A smaller Touch Sensor should have a greater palm rejection area configured since the touch will cover more Touch Sensor cells. On a larger Touch Sensor, the touch will cover fewer cells, so the rejection area should be smaller.
To support the user when configuring the Palm rejection area, see the below table for suggested values to configure the Skin products to reject an adult palm for Touch Sensors with different dimensions.

Touch sensor dimensions Palm setting value
30’’ to 41’’ 8
42’’ to 49’’ 7
50’’ to 64’’ 6
65’’ to 75’’ 5
>75’’ 4

Note: This feature is not available for Skin Dualtouch

The following sequence of images illustrates palm and arm rejection examples.
Note: Depending on the product purchased, palm and hand rejection may have different touch representations.

PALM

Palm rejection is not activated, resulting in multiple touches being reported.

Palm rejection is activated, however, touches are still being reported since the rejection area is not properly adjusted to the Touch Sensor size. An increase or decrease of the palm rejection area is necessary.

Palm rejection is activated with an adequate value for the Touch Sensor dimension. You can see the contours of a hand but no touch is being reported.

ARM

Palm rejection is not active: An arm is placed on the Touch Sensor and the display is reporting multiple touches.

If Palm rejection is activated, with a rejection area adequate for the touch sensor dimensions, we see the contours of an arm, but no touches are reported.