Sub-call Window Overlay for Handheld Device Task Continuity
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Solution Overview
Problem
Existing smartphones interrupt ongoing tasks when an incoming call is received, forcing users to suspend their activities and potentially lose unsaved work, such as unfinished messages or ongoing conversations, due to the device switching to a full-screen call interface.
Innovation Solution
A handheld electronic apparatus with a touch display screen implements an incoming call processing method that displays a sub-call window interface on top of the current task interface, allowing users to answer or reject calls without suspending their activities, and includes controls for managing calls without fully switching from the current task.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the smartphone switches to a full-screen call interface when an incoming call is received, then the call can be answered clearly and completely, but the current task is interrupted and unsaved work is lost
Solution Approach 1:
The call interface is segmented into a sub-window that can coexist with the current task interface. Instead of a full-screen switch, the call interface is divided into a smaller, manageable sub-window that occupies only part of the display area, allowing both the call function and the original task to be accessed simultaneously without complete interruption.
Solution Approach 2:
The call interface sub-window is nested within the current task interface. The sub-window containing call controls (answer, reject, mute) is embedded as an overlay or popup within the existing application window, creating a nested structure where the call functionality is contained within the task environment rather than replacing it entirely.
2Ease of operation
If the smartphone displays a full-screen call interface, then all call controls are accessible, but the user cannot continue the current task simultaneously
Solution Approach 1:
The call interface sub-window is designed to be dynamic and movable across the screen. Users can drag the sub-window to different positions and resize it as needed, allowing flexible arrangement that accommodates both call control accessibility and task visibility. The sub-window can be moved to not obstruct important areas of the current task while maintaining access to all call functions.
Solution Approach 2:
The interface transitions from a two-dimensional full-screen switch to a multi-layered z-depth arrangement where the call sub-window exists as an overlay layer above the task layer. This dimensional change allows both interfaces to occupy the same screen space without conflict, enabling simultaneous access to call controls and task content through layered display architecture.
3Ease of operation
If the smartphone switches to the call interface, then the user can manage call functions comprehensively, but the current application state is lost and must be re-performed
Solution Approach 1:
The system automatically saves the current task state before the call begins, preserving the application context, entered data, and workflow position. This preliminary saving action ensures that when the user returns to the task after the call, all previous work is restored without requiring re-entry, effectively preventing information loss while maintaining comprehensive call management capabilities.
Solution Approach 2:
The current task interface state is copied and preserved in memory or temporary storage when the call sub-window is activated. A snapshot or duplicate of the task state including form data, document content, and application context is maintained, allowing the original task to be restored perfectly after the call ends without any data loss or rework required.
Data Source
AI summary
A handheld electronic apparatus and an incoming call processing method of the handheld electronic apparatus are provided. When an incoming call is received, a type of an operating interface displayed on a touch display screen is determined; according to the type of the operating interface, it is decided whether to display a sub-call window interface on the operating interface.