Foldable Phone Call Prompting Across Target and Non-Target Screens

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Solution Overview

Problem

When using a flexible screen electronic device, if one screen is not within the user's line of sight during a call, the user may miss incoming call information, leading to missed calls due to the inability to perceive the call request.

Innovation Solution

The electronic device determines a target screen and a non-target screen based on the call type and hardware components, displaying incoming call information and prompt information on these screens to guide the user to answer the call effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If incoming call information is displayed on only one screen (target screen), then the display is simple and clear, but the user may miss the call if that screen is not within line-of-sight

Engineering Contradiction:
Improvecall perception reliabilityVSAvoiddisplay complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The display information is segmented into two parts: incoming call information (answer/decline buttons) is displayed on the target screen, while prompt information is displayed on the non-target screen. This segmentation allows the system to provide comprehensive call notification without overwhelming either screen, resolving the contradiction between reliability and complexity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Prompt information acts as an intermediary element that bridges the gap between the target screen (where full call information is displayed) and the user's line-of-sight. The prompt information on the non-target screen serves as a warning signal that guides the user to the target screen, improving call perception reliability without requiring full call information to be displayed everywhere.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If incoming call information is displayed on both screens, then the user can always see the call request, but it causes information redundancy and confusion

Engineering Contradiction:
Improvecall perception reliabilityVSAvoidinformation quality
Core Design Contradiction:
ReliabilityVSLoss of information

Solution Approach 1:

The information is segmented by importance and function: the target screen receives complete incoming call information (contact name, number, answer/decline buttons), while the non-target screen receives only essential prompt information (call notification, directional guidance). This segmentation ensures that no screen displays redundant duplicate information, maintaining information quality while achieving reliable call notification.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different quality levels of information are provided in different locations: the target screen receives high-quality complete information suitable for call processing, while the non-target screen receives lower-quality prompt information suitable for attraction and guidance. This local quality differentiation ensures each screen receives appropriate information without redundancy.

Inventive Principle:
Principle #3Local quality

3Reliability

If the system determines target and non-target screens dynamically, then the call notification accuracy is improved, but the system complexity increases

Engineering Contradiction:
Improvenotification accuracyVSAvoidsystem complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The system dynamically determines which screen is the target screen and which is the non-target screen based on real-time device state (folded/unfolded) and hardware component locations. This dynamic adaptation allows the system to maintain high notification accuracy across different usage scenarios without requiring manual configuration, resolving the contradiction between reliability and complexity through automated adaptive behavior.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS12537897B2Incoming call prompting method and electronic device
Publication Date: 2026.01.27 HUAWEI TECH CO LTD
  • US12537897B2 patent drawing
  • US12537897B2 patent drawing
  • US12537897B2 patent drawing

AI summary

An incoming call prompting method includes an electronic device that receives a call request from a contact, and when a flexible screen of the electronic device is in a folded state, the electronic device determines, in response to the call request, a target screen corresponding to the call request, where the target screen is a first screen or a second screen of the flexible screen; the electronic device displays an answer button on the target screen; and the electronic device displays prompt information of the call request on a non-target screen, where the prompt information prompts a user to answer the current call request using the answer button displayed on the target screen.