Wearable Display Update Mechanism for Power Management
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Solution Overview
Problem
Wearable devices such as smartwatches face challenges in updating displayed content due to high power consumption associated with asynchronous updates, which significantly reduces battery life, and multi-stable displays are limited in the number of image updates they can perform.
Innovation Solution
A method that determines a time interval between successive updates of an image frame, allowing the device to operate in a low power mode between updates, and updates the image frame only after receiving updates from applications within that interval, thereby minimizing power usage and extending device lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If asynchronous updating of displayed content is implemented, then content can be updated as updates are received, but power consumption increases significantly
Solution Approach 1:
The patent implements periodic action by establishing fixed time intervals between display updates. The system determines a time interval between successive updates of an image frame and operates in low-power mode between updates, only activating the display at periodic intervals. This resolves the contradiction by maintaining content update functionality while consuming significantly less power compared to continuous asynchronous updates.
2Loss of information
If continuous display updates are performed, then displayed content remains current, but battery life is drastically reduced
Solution Approach 1:
The system employs periodic action by updating the display at predetermined time intervals rather than continuously. The processor determines a time interval between successive image frame updates and enters low-power mode between updates, ensuring content remains relatively current while dramatically extending battery life by avoiding continuous operation.
Solution Approach 2:
The patent applies preliminary action by determining and preparing the time interval for display updates in advance. The system pre-establishes when updates will occur and proactively enters low-power mode between these predetermined times, optimizing battery life before power depletion becomes critical.
3Productivity
If multi-stable displays perform frequent image updates, then displayed content can be refreshed, but the lifetime of the display is reduced
Solution Approach 1:
The patent implements periodic action by limiting display updates to specific time intervals rather than allowing frequent updates. The system determines a time interval between successive image frame updates and enforces this periodicity, thereby reducing the total number of updates the multi-stable display must perform and extending its operational lifetime while maintaining essential refresh capability.
Data Source
AI summary
A method for updating images displayed on an electronic display of a mobile device includes determining a time interval between successive updates of an image frame. The image frame is displayed on the electronic display, and the mobile device is configured to be in a low power mode between the successive updates. The method also includes receiving one or more application updates within the time interval after a first update of the image frame, and updating the image frame after the time interval based on the one or more application updates.