Mobile Display Backlight Power Management via Processor Coordination
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Solution Overview
Problem
As mobile computing devices face increasing demands in processing and wireless communications, managing battery life effectively remains a challenge due to the power consumption of display backlights and other peripherals, especially during operations that do not require user interaction or output generation.
Innovation Solution
A method for power management in mobile computing devices that involves activating the display and backlight only when necessary, such as during data transfers or user interactions, and deactivating or dimming them during processes like file transfers, application installations, or boot-ups to reduce power consumption, using a processor-controlled power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display and backlight are kept active continuously, then user interaction and output generation are ensured, but power consumption increases and battery life decreases
Solution Approach 1:
The system implements periodic activation of the display and backlight based on operational state. The backlight is activated during processing operations that require output generation or user interaction, and deactivated during operations that do not require such interaction. This periodic on-off action reduces overall power consumption while ensuring the display is available when needed.
Solution Approach 2:
The system dynamically adjusts the display state based on real-time processing requirements. The processor monitors the operational state and dynamically switches the backlight between active and inactive states, allowing the system to adapt power consumption to actual operational needs rather than maintaining a fixed state.
2Use of energy by moving object
If the display is deactivated during processing operations, then power consumption is reduced, but user interaction capability is lost
Solution Approach 1:
The system uses feedback from the processor about the current operational state to control backlight activation. When the processor detects that a processing operation requires output generation or user interaction, it provides feedback to activate the backlight. This feedback mechanism ensures the display is activated only when actually needed, preventing unnecessary power consumption while maintaining user interaction capability when required.
Solution Approach 2:
The system activates the backlight in advance before processing operations that require user interaction begin, and keeps it active throughout the duration of such operations. This preliminary activation ensures that when users need to interact with the device, the display is already visible and ready for interaction.
Data Source
AI summary
A method, apparatus and system for power management in a mobile computing device is provided. In one aspect, the mobile computing device comprises a display with a backlight that is power by a power supply under the control of a processor. The mobile computing device is also configured to execute a web browser or other application that access a network resource. Activation of the backlight is controlled in coordination with the network resource in order to manage drain of power from the power supply.