Backlight Control via Screen Update Detection
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Solution Overview
Problem
Existing systems for controlling the backlight of portable devices often turn off the backlight automatically after a set time period, regardless of user intent, leading to user dissatisfaction, especially during activities like reading text.
Innovation Solution
A system that controls the backlight's duration based on user intent by identifying network activity, screen updates, and application states, ensuring the backlight remains on during active usage and turns off only when the screen is not updated within a designated area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the backlight is turned off automatically after a set time period, then power consumption is reduced, but user convenience deteriorates when the user is actively using the device
Solution Approach 1:
The system continuously monitors screen update status and application activity states to detect user interaction. When screen updates occur or applications remain active, the system extends the backlight on-time. This feedback mechanism ensures the backlight remains on during active usage while automatically turning off during idle periods, resolving the contradiction between power savings and user convenience
Solution Approach 2:
The backlight control system dynamically adjusts its behavior based on real-time device state. Instead of using a fixed timeout period, the system modifies the backlight duration according to detected user activity, screen update frequency, and application states. This dynamic adjustment allows the system to optimize power consumption during idle periods while ensuring adequate illumination during active usage
2Ease of operation
If the backlight remains on continuously, then user convenience is improved, but power consumption increases
Solution Approach 1:
The system implements periodic monitoring of screen updates and application activity to determine whether the backlight should remain on. Instead of continuous operation, the backlight is activated in periodic intervals based on detected user interaction. This periodic action pattern reduces overall power consumption while maintaining user convenience during actual usage periods
Solution Approach 2:
The system uses feedback from screen update detection and application state monitoring to control backlight duration. When no screen updates occur within a monitoring period or applications are inactive, the system turns off the backlight. This feedback-driven approach ensures the backlight operates only when necessary, balancing power savings with user convenience
3Measurement precision
If the system monitors application states and screen updates to control backlight, then user intent accuracy is improved, but system complexity increases
Solution Approach 1:
The system uses existing components (screen update detection mechanisms, application state trackers) for dual purposes: their primary functions plus backlight control decision-making. By making these existing components serve multiple functions, the system achieves accurate user intent detection without proportionally increasing overall system complexity
Solution Approach 2:
The backlight control logic is merged with the existing screen update detection and application state monitoring systems. Instead of creating separate independent monitoring systems, the invention combines multiple monitoring functions into a unified control mechanism that leverages shared resources and processing pathways, thereby reducing the expected complexity increase
Data Source
AI summary
A system determines a time period used for controlling a backlight and other processing device power consumption related characteristics to more closely reflect user intent determined in response to an operation state of an application, for the system determines the operation state based on, activity of an application in requesting transmission and reception of data, display screen update and completion of presentation of a view configuration (display area) The system reduces inadvertent turning off of a backlight and other device power consumption features.