Foldable Electronic Device with Folding-Angle App Control

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Solution Overview

Problem

In foldable electronic devices with displays on one surface, users face inconvenience when fully unfolding the device to interact with applications due to limitations in size and visibility of sub-displays on the opposite surface.

Innovation Solution

An electronic device that allows applications to be controlled based on its folding angle, enabling efficient operation without full unfolding, utilizing a flexible display and sensor areas to manage user interactions across different folding states.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If the display is arranged on one surface (front surface) of the foldable housing, then the device can provide a larger screen when unfolded, but the user must fully unfold the device to see and control the displayed content, which increases the time required for interaction

Engineering Contradiction:
Improvedisplay screen areaVSAvoidtime for unfolding and interaction
Core Design Contradiction:
Area of stationary objectVSLoss of time

Solution Approach 1:

The patent introduces a second display surface (rear surface) as an additional dimension for interaction. When the device is folded, the rear surface becomes accessible to the user, allowing control of applications without requiring full unfolding. This spatial dimensionality change enables parallel access to display content and control interfaces.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The display functionality is segmented into two separate surfaces: the front surface for primary content display and the rear surface for control interface display. This segmentation allows different functions to be performed on different surfaces simultaneously, resolving the contradiction between large screen area and quick interaction.

Inventive Principle:
Principle #1Segmentation

2Ease of operation

If a sub-display is arranged on the opposite surface (rear surface) of the housing to allow application control, then interaction can occur without full unfolding, but the size and visibility of the sub-display are limited

Engineering Contradiction:
Improveapplication control convenienceVSAvoidsub-display size and visibility
Core Design Contradiction:
Ease of operationVSArea of stationary object

Solution Approach 1:

The patent implements dynamic switching between different display configurations based on the folding state. When folded, the rear surface displays control interfaces; when unfolded, the front surface displays full content. This dynamic adaptation allows the system to optimize both control convenience and display size according to the current state.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

Both the front and rear surfaces serve multiple functions: the front surface can display content and the rear surface can display control interfaces, but either surface can adapt to different roles based on device state. This multi-functionality resolves the limitation of fixed sub-display size by making the entire rear surface available for control purposes when needed.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentEP3821329B1Electronic device for controlling application according to folding angle and method thereof
Publication Date: 2025.10.01 SAMSUNG ELECTRONICS CO LTD
  • EP3821329B1 patent drawingFigure 1
  • EP3821329B1 patent drawingFigure 2
  • EP3821329B1 patent drawingFigure 3

AI summary

An electronic device includes a foldable housing including a first surface and a second surface opposite to the first surface, a first display arranged on the first surface and configured to be flexible, a second display arranged in at least a partial area of the second surface, and a processor arranged inside the foldable housing. The processor detects that the foldable housing is unfolded to a first angle from a fully folded state, displays a first GUI associated with a first application on at least a partial area of the display, detects that the foldable housing is unfolded to a second angle greater than the first angle, displays a second GUI associated with a second application, and executes the second application when the foldable housing is folded back into the fully folded state.