Apple enabled application developers to leverage the pressure sensitivity of trackpads and touchscreens into their own apps.

The touchscreen no longer has a pressure sensitive layer, so the software waits for a long-press to activate certain features, instead of a force press.

This feature was added to the iPhone SE (1st generation) with the iOS 13 update and to any iPad capable of running iPadOS 13.

When a press is detected, these capacitive sensors measure microscopic changes in the distance between the back light and the cover glass.

The electromagnetic linear actuator within the Taptic engine is capable of reaching its peak output in just one cycle and producing vibrations that last 10 milliseconds.

[9] This helps in gaining the user's attention in order to convey an important information such as a success, warning or a failure.

According to the complaint, the asserted patents generally related to the apparatus and methods used in the implementation of pressure-enabled haptics to enhance the user experience on electronic devices.

In June, the United States International Trade Commission confirmed it would launch an investigation into Immersion's claims.

The violated patents from the second lawsuit, with their corresponding description are as follows:[16] On January 29, 2018, Immersion released a brief statement confirming that the company had reached global settlement and license agreements with Apple, the terms of which would be kept confidential.

[21] Phones including the ZTE Axon mini, Meizu Pro 6, Huawei Mate S, and the Huawei P9 Plus feature a pressure sensitive display,[22] and the Google Pixel 4 features a software-based technology called Firm Press, which tries to guess the force of pressure using machine learning.

[24] Nokia had a development project called 'Goldfinger' in 2013, which used a completely different type of 3D touch interface, which required the user to hover their finger above the screen.