Pre-OS Display Brightness Control for Low-Battery Boot Stability
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Solution Overview
Problem
Existing systems fail to manage display brightness efficiently during pre-operating system stages, leading to high power consumption, system instability, and poor user experience due to unmanaged backlight control, especially in low battery conditions.
Innovation Solution
Implementing a dynamic backlight control mechanism during pre-OS stages, where the embedded controller determines battery status and adjusts display brightness to a lower level if the battery is low, conserving power and allowing the system to boot efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display backlight is maintained at high brightness during pre-OS stages, then the visual experience and user interaction are preserved, but the power consumption increases significantly
Solution Approach 1:
The patent implements dynamic backlight control that adjusts display brightness based on real-time battery condition assessment. The system transitions from static high brightness to adaptive brightness levels, switching between full brightness, reduced brightness, and minimal brightness modes according to battery charge levels and boot progress, thereby optimizing the trade-off between visual experience and power consumption
Solution Approach 2:
The system changes the brightness parameter of the display based on battery condition thresholds. When battery charge drops below certain thresholds (e.g., 20%, 10%), the system automatically adjusts the backlight intensity parameter, reducing it from 100% to lower levels to conserve power while maintaining sufficient visibility for user interaction
2Reliability
If the display power is increased to ensure visibility during boot, then user interaction is maintained, but system stability under low power conditions deteriorates
Solution Approach 1:
The patent implements preliminary assessment of battery conditions before full system initialization. The embedded controller evaluates battery charge levels and power availability in advance, setting appropriate brightness levels and power management parameters before the display fully activates, preventing power instability during critical boot phases
Solution Approach 2:
The system continuously monitors battery condition and power availability, using this feedback to dynamically adjust display brightness and power consumption. The embedded controller provides real-time feedback about power state to the BIOS, which adjusts display parameters accordingly, creating a closed-loop control system that maintains stability under varying power conditions
3Duration of action of moving object
If dynamic backlight control is implemented, then power consumption is reduced and battery life is extended, but device complexity increases
Solution Approach 1:
The patent implements a self-service power management system where the embedded controller automatically monitors battery conditions and adjusts display brightness without user intervention. The system uses predefined brightness levels and thresholds, automatically selecting appropriate settings based on real-time battery state, thereby extending battery life through automated rather than manual control
Solution Approach 2:
The embedded controller serves multiple functions: it monitors battery charge levels, assesses power availability, controls display backlight intensity, and manages power distribution to various system components. By consolidating these power management tasks into a single controller, the patent reduces overall system complexity while achieving dynamic backlight control and extended battery life
Data Source
AI summary
Particular embodiments described herein provide for an electronic device that includes a battery, a display, an embedded controller to determine a battery condition and set an indicator when then battery condition is at a low power state, and a basic input/output system (BIOS), where, before an operating system stage of a boot process, the BIOS sets a brightness of the display at a native brightness if the indicator is not set and sets the brightness of the display at a low power brightness to reduce the brightness of the display if the indicator is set. In an example, the embedded controller sets the indicator before the central processing unit is reset during the boot process.