One area that directly influences a buyer’s decision to purchase a foldable display device is the user interface (UI), particularly if it is easy to navigate and provides a better user experience.

U.S. Publication No. 20200225848 assigned to Samsung and titled, “Electronic Device and Method for Controlling Screen Displayed in Flexible Display which is Rollable”, focuses on detecting multi-touch gestures to interact with a user interface.

US Publication No. 20200225848 assigned to Samsung

The disclosed method allows a user to touch a first display region displaying a first UI at two positions. Upon detecting the input at two points, the rollable display displays a second UI based on the first UI in the second region. The publication also discloses various other gestures, such as a drag gesture to either expand the first UI in the first region to a second region, or display additional information related to the UI object being pointed at the first input region.

While Samsung’s publication is focusing on multi-touch gestures, Huawei’s PCT publication number WO2020143408, titled “Display Method and Related Apparatus” is interfacing the user input of switching from one screen to the other when the device is folded for UI interaction.

PCT Publication Number WO2020143408 assigned to Huawei

The PCT publication is disclosing three use cases.

  • In the first case, a reading application’s UI is displayed on the first display region when the device is in a folded state. Upon detecting that the user flipped the device to view the second display region, the device automatically displays the same UI from the reading application in a manner that is easier to read for the user (e.g. turning the background to black and the text to white).
  • In the second case, a camera UI is displayed on the first display region when the device is in the folded state and the cameras are integrated above the second screen, the camera UI displays a first preview image which includes the images in the direction of the second screen. Upon detecting that the user flipped the device to view the second display region, the device displays a preview of the user’s face in a portrait mode or any other capturing mode best suitable for capturing selfies.
  • In the third case, the first camera is integrated above the first display region and the second camera is integrated above the second display region. Similar to the first and second cases, the device displays the first video calling application’s UI on the first display region where the UI includes the screen captured by the first camera overlaid with the other party’s screen of the video call. Upon detecting that the user flipped the device to view the second display region, the device displays the UI of the video calling application where the UI includes the screen captured by the second camera and the other party’s screen of the video call in first and second non-overlapping areas respectively within the second display region.