Palm Rejection

Table of Contents

PALM Rejection

It allows the rejection of areas with dimensions larger than a finger, such as a hand or an arm. The rejection area can be configured and is conditioned by the Touch Sensor size.
On the same hand, a smaller Touch Sensor should have a greater palm rejection area since the touch is going to cover more Touch Sensor cells. On a bigger Touch Sensor, the hand touch will cover fewer cells. In this case, the rejection area should be smaller.
To support the user when configuring the palm rejection area, here is a table with suggested values to configure the Skin product to reject an adult palm for Touch Sensors with different dimensions.

Touch sensor dimension Rejection area reference
30’’ to 41’’ 8
42’’ to 49’’ 7
50’’ to 64’’ 6
65’’ to 75’’ 5
>75’’ 4

Note: Feature not available in Skin Dualtouch

A sequence of images is presented to illustrate palm and arm rejection examples.
Note: touch representation, in palm and arm rejection, may differ slightly depending on the product you have purchased.

PALM

Palm rejection is not activated, as a result multiple touches are being recognized.

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

Palm rejection is activated with an adequate value for the Touch Sensor dimension. In the following image, you can see the contours of a hand but no touch is being recognized.

ARM

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

If Palm rejection is activated, with a certain rejection area adequate to the touch sensor dimension, we can see the contours of an arm but no touch is being recognized.