Contour-Based Prompt Playback for Low-Memory Function Guidance

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Solution Overview

Problem

Storing animations for guiding users through device functions, such as fingerprint recording, occupies large storage space due to multiple frames of images, which is inefficient.

Innovation Solution

Generate a prompt file that includes only contour information and base/background images, reducing the need to store complete image frames by using contour information to reconstruct the display effect during playback.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If complete image frames are stored for animation playback, then the display effect is complete and accurate, but the storage space occupied is large

Engineering Contradiction:

Improvedisplay effect completenessVSAvoidstorage space

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent extracts only the essential contour information from complete image frames, separating the critical boundary data from the full image data. This allows the system to store minimal information (contour coordinates) while reconstructing the complete visual effect during playback, directly resolving the contradiction between display completeness and storage efficiency

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of storing actual complete image frames, the patent creates a simplified copy representation using contour coordinate information. This copy contains only the essential geometric boundaries needed to reconstruct images, reducing storage requirements from megabytes per frame to kilobytes per frame while maintaining visual fidelity

Inventive Principle:

Principle #26Copying

2Ease of operation

If multiple frames of animation are stored to guide users, then the guidance function is effective, but the memory occupation increases significantly

Engineering Contradiction:

Improveuser guidance effectivenessVSAvoidmemory occupation

Core Design Contradiction:

Ease of operationVSQuantity of substance

Solution Approach 1:

The patent extracts only the necessary contour information from animation frames, removing redundant pixel data while preserving the essential visual guidance content. This extraction approach maintains user guidance effectiveness by keeping the functional contour information while eliminating memory-burdening redundant data

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent transforms the representation parameters of animation frames from full pixel matrices to contour coordinate sets. This parameter change fundamentally alters the data structure from high-memory-consuming image arrays to low-memory-coordinate lists, achieving efficient storage while preserving animation guidance functionality

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12541904B2Electronic device, method for prompting function setting of electronic device, and method for playing prompt file

Publication Date: 2026.02.03 HUAWEI TECH CO LTD

AI summary

In an embodiment a method includes displaying, by an electronic device, a first sequence frame image of a prompt file in response to a first operation performed by a user and displaying, by the electronic device, a second sequence frame image of the prompt file in response to a second operation performed by the user, wherein the prompt file comprises at least first-part contour information and second-part contour information of a playing object, wherein the first sequence frame image is generated based on the first-part contour information of the playing object, and wherein the second sequence frame image is generated based on the second-part contour information of the playing object and comprises content of the first sequence frame image.