Dynamic Backlight Control for Secondary Screen Power Optimization
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Solution Overview
Problem
Existing portable electronic devices with secondary screens face challenges in efficiently managing backlight brightness to conserve power, as the secondary screen's backlight remains constant regardless of its operational state, leading to unnecessary power consumption.
Innovation Solution
A backlight control method that determines the input state of an electronic device and adjusts the backlight brightness of the input area accordingly, distinguishing between inputting, input-waiting, and non-inputting states to optimize power usage and user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the backlight brightness of the secondary screen is kept constant to ensure visibility of keys, then the user experience is maintained, but the power consumption increases
Solution Approach 1:
The patent applies dynamics by transitioning the backlight brightness from a static constant value to a dynamic adjustable value that changes according to the operational state of the secondary screen. The system detects different states (inputting, input-waiting, non-inputting) and automatically adjusts the backlight brightness parameter accordingly, making the brightness adaptive rather than fixed.
Solution Approach 2:
The patent implements parameter changes by modifying the backlight brightness parameter based on the detected input state. When the system transitions between different operational states (e.g., from inputting to non-inputting state), it changes the backlight brightness parameter from a higher value to a lower value, thereby optimizing power consumption while maintaining necessary visibility.
2Use of energy by moving object
If the backlight brightness is reduced to save power, then the power consumption decreases, but the visibility of keys on the secondary screen deteriorates
Solution Approach 1:
The patent applies local quality by differentiating the backlight brightness requirements for different operational states of the secondary screen. Instead of using a uniform brightness level, the system applies different brightness levels locally to different states: higher brightness for inputting state where visibility is critical, and lower brightness for non-inputting state where power saving is prioritized.
Solution Approach 2:
The system dynamically adjusts the backlight brightness based on real-time detection of the operational state. The brightness parameter is not fixed but changes dynamically in response to state transitions, ensuring optimal balance between visibility and power consumption at different moments.
3Adaptability or versatility
If the backlight brightness is manually adjusted frequently to match different usage scenarios, then the adaptability improves, but the device complexity increases
Solution Approach 1:
The patent implements self-service by enabling the system to automatically detect its own operational state and autonomously adjust the backlight brightness without requiring user intervention. The detection module identifies the current state (inputting, input-waiting, or non-inputting), and the control module automatically modifies the brightness parameter, making the system self-regulating.
Solution Approach 2:
The system employs feedback by continuously monitoring the operational state of the secondary screen and using this information to adjust the backlight brightness. The detection of input events (or lack thereof) provides feedback to the control module, which then modifies the brightness parameter accordingly, creating a closed-loop control system.
Data Source
AI summary
A backlight control method and an electronic device are provided. The backlight control method, comprises: determining an input state of an electronic device; and adjusting a backlight brightness parameter of an input area of the electronic device according to the input state of the electronic device, wherein the backlight brightness parameter of the input area of the electronic device is adjusted from a plurality of backlight luminance values that indicate a plurality of backlight brightness levels of the input area.