Self-adaptive display aspect ratio adjuster and gesture on rolling devices

A method for controlling a rolling display device, said rolling display device comprising a controller, a housing, a roll unit mounted in the housing and configured to be rotatable around a roll axis, a flexible, touch-sensitive display rolled around said roll unit and defining a planar front screen having a fixed first dimension and a second dimension that changes according to a degree of rotation of said roll unit, and an accelerometer connected to said controller, the method comprising:

• calculating, by said controller, an optimal second dimension for displaying a visual content based on said fixed first dimension, an orientation of said display, and an aspect ratio of said visual content;
• adjusting, by rotating said roll unit, the second dimension of said front screen to said optimal second dimension;
• and
• displaying said visual content on said front screen;
• detecting a first movement gesture or a second movement gesture by said accelerometer;
• and
• adjusting said front screen by said controller between a rolled-in state wherein said second dimension is minimal, and a rolled-out state wherein said second dimension is maximal;
• wherein
• in response to the accelerometer detecting a first movement gesture, said front screen is adjusted to a rolled-out state, and
• in response to the accelerometer detecting a second movement gesture, said front screen is adjusted to a rolled-in state;
• wherein the first movement gesture comprises:
• a first sub-gesture of arranging said display in a horizontally upwards state, and
• a second sub-gesture of shaking said display by rotating in a clockwise direction around an axis parallel to said roll axis while keeping said display upwards and returning the display to said horizontally upwards state;
• wherein said second movement gesture comprises:
• said first sub-gesture, and
• a third sub-gesture of shaking said display by rotating in a counter-clockwise direction around an axis parallel to said roll axis while keeping said display upwards and returning the display to said horizontally upwards state;
• and
• wherein the method further comprises:
• detecting a time interval Td elapsed between said first sub-gesture and said second sub-gesture or said third sub-gesture, to
• interpreting said first movement gesture valid only if said time interval Td between the first sub-gesture and the second sub-gesture is equal or shorter than a predefined time threshold Tr, and to
• interpreting said second movement gesture as valid only if said time interval Td between the first sub-gesture and the third sub-gesture is equal or shorter than a predefined time threshold Tr.

A device comprising:

• a housing;
• a roll unit mounted in the housing and configured to be rotatable around a roll axis;
• a flexible touch-sensitive display configured to be rolled around said roll unit and to define a planar front screen having a fixed first dimension and a second dimension that changes according to a degree of rotation of said roll unit;
• a controller configured to control said display to display a visual content on said front screen, and to adapt at least one dimension of said visual content to match a corresponding dimension of said front screen;
• an accelerometer connected to said controller and configured to detect movement gestures of said display;
• wherein said front screen is configured to be adjusted by said controller between a rolled-in state in which said second dimension is minimal, and a rolled-out state in which said second dimension is maximal;
• wherein the controller is further configured to:
• in response to the accelerometer detecting a first movement gesture, adjust said front screen to a rolled-out state;
• and
• in response to the accelerometer detecting a second movement gesture, adjust said front screen to a rolled-in state;
• wherein said first movement gesture comprises:
• a first sub-gesture of arranging said display in a horizontally upwards state, and
• a second sub-gesture of shaking said display by rotating in a clockwise direction around an axis parallel to said roll axis while keeping said display upwards and returning the display to said horizontally upwards state;
• wherein said second movement gesture comprises:
• said first sub-gesture;
• and
• a third sub-gesture of shaking said display by rotating in a counter-clockwise direction around an axis parallel to said roll axis while keeping said display upwards and returning the display to said horizontally upwards state;
• and
• wherein said controller is configured to:
• detect a time interval Td elapsed between said first sub-gesture and said second sub-gesture or said third sub-gesture, to
• interpret said first movement gesture valid only if said time interval Td between the first sub-gesture and the second sub-gesture is equal or shorter than a predefined time threshold Tr, and to
• interpret said second movement gesture as valid only if said time interval Td between the first sub-gesture and the third sub-gesture is equal or shorter than a predefined time threshold Tr.