Display Luminance Control for Power and Burn-in Reduction
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Solution Overview
Problem
Electronic devices face challenges in reducing power consumption and preventing display burn-in while maintaining the screen in a turned-on state, which also affects user eye protection.
Innovation Solution
An electronic device with a processor and memory that determines a second screen code value by decrementing a first screen code value based on the screen being on after a screen-off condition is satisfied, and adjusts the luminance accordingly, even when the screen is maintained on due to application requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the screen is maintained in a turned on state in response to application requests, then the application functionality is preserved, but power consumption increases and burn-in risk increases
Solution Approach 1:
The patent applies dynamics by making the screen luminance adjustable and time-dependent. The processor dynamically adjusts the luminance value based on the elapsed time since the screen-off condition was satisfied, transitioning from a static on/off state to a dynamic luminance control system that adapts over time while keeping the screen active for application functionality.
Solution Approach 2:
The patent changes the luminance parameter over time according to a predetermined curve. The processor modifies the luminance value from its initial level to a lower level based on the elapsed time, implementing parameter changes that reduce power consumption and burn-in risk while maintaining screen visibility for running applications.
2Use of energy by moving object
If the screen luminance is reduced to save power, then power consumption decreases, but visibility and user experience deteriorate
Solution Approach 1:
The patent uses dynamics to implement time-based luminance adjustment. Instead of a sudden drop to minimum luminance, the screen luminance changes gradually over time according to a predetermined curve, maintaining adequate visibility during the transition while ultimately reducing power consumption.
Solution Approach 2:
The patent implements periodic action through continuous monitoring of elapsed time and progressive luminance adjustment. The processor periodically updates the luminance value based on time intervals, creating a controlled progression that balances visibility requirements with power savings.
3Ease of operation
If the screen remains on for extended periods, then application accessibility is maintained, but burn-in of the display increases
Solution Approach 1:
The patent applies preliminary anti-action by proactively reducing screen luminance before burn-in can occur. The processor preemptively adjusts the luminance downward based on elapsed time, counteracting the burn-in effect that would otherwise result from prolonged high-luminance operation while the screen remains active for application access.
Solution Approach 2:
The patent uses dynamic luminance adjustment to prevent burn-in. By continuously adapting the luminance level based on how long the screen has been active, the system creates a time-varying protective effect that reduces cumulative exposure to high luminance levels that cause burn-in.
Data Source
AI summary
An electronic device includes: a display device, a processor operatively connected to the display device, and a memory operatively connected to the processor. The memory stores one or more instructions that when executed, cause the processor to: determine, as a second screen code value, a code value obtained by reducing a first screen code value corresponding to a luminance value of a screen of the display device by a decrement based on the screen being maintained in a turned on state during a first specific time after a screen-off condition of the display device is satisfied, and change the luminance value of the screen to correspond to the determined second screen code value.