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 Input Interactions for Mobious Shaped Flexible Devices

In the past few years, considerable progress has been made in the applications of thin and flexible display devices. This invention focuses on a novel input interaction of a mobile shaped flexible display device.

Introducing the Möbius strip
The Möbius strip or Möbius band (also called as twisted cylinder) is a ruled surface with only one side and only one boundary. It is a one-sided non-orientable surface obtained by cutting a closed band into a single strip, giving one of the two ends thus produced a half twist, and then reattaching the two ends. Although several applications of the Möbius strip have been explored in construction, clothing, music, physics, electro-technology, chemistry and nano-technology, it still remains unexplored in flexible handheld devices. The Mobius shape provides a continuous display, which is currently not available in any technology or devices. Moreover, it leverages the potential of two sides of display, meaning the total size of the flexible device is doubled.

In this documentation, we provide only few of many identified input interactions for mobius shaed flexible display device. These interactions are specific to mobius shape.

Funding agency: Nokia Technologies
Team members: Aditi Singh, Priyanka Das, Vrushin Goswami, Safinah Ali, Shimmila Bhowmick and Keyur Sorathia

Placing the bottom display adjacent to the top display to create two parallel displays in one device

Two parallel displays are created by sliding the bottom display adjacent to the top display (figure 2). Two fingers underneath the bottom display and a thumb over the bottom display is used to shift the bottom display adjacent to top display. This results in two parallel displays on one Möbius shaped flexible displays.
Further interactions proposed for two parallel displays

  • Swiping, to transfer displayed contents/information from one display to another display in two parallel displays
  • Swiping opposite to adjacent screen, to delete displayed contents/information
  • Horizontal tilting, one or both screens, individually and together, both sides (left & right), to transfer contents from one display to another display in two parallel displays
  • Vertical tilting, one or both screens, individually and together, both sides (up & down), to scroll the contents up and down
  • Touching of the sides of two parallel screens, to expand the display view of active application
  • Touching (a finger) to a specific icon/contents and tapping the screen to the adjacent screen, to open related contents/information/applications.

For example, touching a photo browsing application and taping one screen on the adjacent screen opens the photo browser in an adjacent display. This helps user work on multiple applications parallel on the adjacent screens

Two fingers rotate

Entangling two opposite loops of the Möbius shaped display between two index fingers and rotating it in forward and backward direction in order present progressive and regressive content respectively on the display

  • Entangling two opposite loops of the Möbius shaped display between two fingers and rotating it in forward direction to present progressive contents on the display
  • Entangling two opposite loops of the Möbius shaped display between two fingers and rotating it in backward direction to present regressive contents on the display
  • Entangling two opposite loops of the Möbius shaped display between two index fingers and stretching with both fingers to expand the display view.

This basically enlarges the existing application options – e.g. zoom-in the photographs, show message details in inbox etc.

Twisting the Mobius inside-out and outside-in

Twisting the strip inside out and vice versa to present progressive and regressive contents. Further interactions:

  • Twisting inside out to showcase succeeding contents of the application (e.g. next email, next page etc.)
  • Twisting outside in to showcase previous contents of the application (e.g. previous email, previously browsed page)
  • Twisting inside out and outside in to refresh the activated application
Holding the Mobius like a stylus
Holding the Möbius in the hand and inserting a finger into the loop in order to get a pen like shape. This allows the user to write on flat surfaces. The written data is stored digitally into the Möbius so the user can take short notes, write instant messages during meeting.
Endless upward & downward movement of Möbius shaped flexible display

Handheld devices are small in size, with limited screen spaces. A large amount of data is accessed by scrolling through finger and/or eye gestures in existing handheld devices. The shape of a Möbius strip provides a continuous surface, which makes it a very unique interface shape for display. The Möbius strip makes an infinite length endless surface. Continuous upward and downward movement of strip of the Möbius shaped flexible display enables continuous scrolling. Moreover, it enables access to the information on both the surfaces. It is a natural infinite scrolling experience that is unique to the Möbius strip shaped interface.

  • Continuous downward movement, to scroll in downward or progressive direction - Tilting (both sides) and continuous downward movement, to move screen objects on specific path along with scrolling in downward or progressive direction
  • Continuous upward movement, to scroll in upward or regressive direction - Tilting (both sides) and continuous upward movement, to move screen objects on specific path along with scrolling in upward or regressive direction
Pinching to create a closed loop

Pinching to join two surfaces of Möbius shaped flexible display creates a closed loop. This enables activating specific interfaces in defined closed loop. Pinching and joining pinched surfaces

  • Enables selection of a paragraph or a text
  • Enables selection of multiple images at once
Technology implementation

The proposed interactions are realized using a flexible display apparatus inlcuding a flexible display panel made up of flexible organic light-emitting display, a window film disposed on an encapsulation substrate with a material or thickness having modus of elasticity of about 6.3 gigapascals or more to enable bend and foldable interactions. This window film may include transparent polyethelene, terephthalate, polymetheylmethacrylate, polycarbonate or polymide. The flexible display panel may include: a thin film transistor on a foldable substrate; an insulating layer covering the thin film transistor; an organic light-emitting diode which is on the insulating layer, is electrically connected to the thin film transistor and is configured to emit light, and includes an organic emission layer between two electrodes. The proposed interactions can be accomplished using this technique of flexible displays which demands majorly bending and folding interactions in different forms to achieve them.

Another technique is to use a projected display on any flexible material surfaces e.g. paper, cardboard, textile fabric etc. which is tracked using computer visions techniques. Computer vision can track the orientation, speed, location and shape of the device and project relevant information through a projection. Infrared reflective markers dots are placed on the Mobius surface. Motion capturing cameras detect the infrared reflective markers – which tracks shape, location and orientation of the Mobius surface. Projected system projects the relevant information based on interactions to the Mobius surface. We have used this method to prototype our concepts.