Rolling Flexible Display Control for Closed-Cover Notifications

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Solution Overview

Problem

Existing electronic devices with covers face challenges in providing interaction and information when the cover is closed, as they cannot effectively display notifications or interact with peripheral devices like electronic pens or wireless earphones.

Innovation Solution

The electronic device includes a flexible display and a rolling actuator that expands or reduces the display in response to predetermined events, such as message reception or peripheral device interaction, allowing for the display of user interfaces on one surface even when the cover is closed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the cover is closed to protect the display, then the display is protected from external shocks and scratches, but the display cannot be seen and interaction is limited

Engineering Contradiction:
Improvedisplay protectionVSAvoidinteraction capability
Core Design Contradiction:
StrengthVSEase of operation

Solution Approach 1:

The display is divided into a first display region (always visible) and a second display region (expandable when cover is closed). This segmentation allows the display to provide limited interaction when protected while enabling full interaction when expanded, resolving the contradiction between protection and usability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The display transitions from a static fixed size to a dynamic expandable size. When the cover is closed, the display can be expanded to a larger second display region, allowing the system to adapt between protection mode and interaction mode dynamically.

Inventive Principle:
Principle #15Dynamics

2Area of stationary object

If the display size is increased to provide more information, then information display capability is improved, but the device size and portability are reduced

Engineering Contradiction:
Improvedisplay areaVSAvoiddevice portability
Core Design Contradiction:
Area of stationary objectVSDevice complexity

Solution Approach 1:

The display size is made dynamic rather than fixed. The display can expand to a larger second display region when needed (e.g., when cover is closed) and return to its compact first display region when portability is prioritized, allowing the system to balance information display and portability based on usage context.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The expandable display region is nested within or adjacent to the main device body. The second display region can be extended from the first display region, allowing the display to grow when needed while maintaining a compact form factor when retracted, similar to a nested structure.

Inventive Principle:
Principle #7Nested doll (Nesting)

3Adaptability or versatility

If the display is expanded to enable interaction with peripheral devices, then interaction capability is improved, but the device structure becomes more complex

Engineering Contradiction:
Improveperipheral device interactionVSAvoiddevice structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The display and interaction capabilities are segmented into different operational modes. The first display region handles basic functions, while the expandable second display region handles peripheral device interactions, allowing complexity to be activated only when needed rather than being permanently present.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The expandable display region serves multiple functions: displaying additional information, enabling peripheral device interactions (electronic pens, wireless earphones), and providing notifications. This multi-functionality justifies the added structural complexity by consolidating multiple capabilities into a single expandable region.

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

Data Source

PatentUS12504872B2Method for controlling flexible display and electronic device thereof
Publication Date: 2025.12.23 SAMSUNG ELECTRONICS CO LTD
  • US12504872B2 patent drawing
  • US12504872B2 patent drawing
  • US12504872B2 patent drawing

AI summary

An electronic device is provided, which can include a flexible display, a rolling actuator for expanding or reducing the flexible display, a wireless communication circuit, and a processor. The processor can receive, via the wireless communication circuit, a message from an external device, and in response to receiving the message, drive the first rolling actuator, expand the flexible display by a first length in a first direction, and display a first UI including a plurality of content, in a first region of the flexible display expanded by the first length.