Backlight Control via Display Signal Pattern Detection
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Solution Overview
Problem
Electronic devices with backlit display panels face inefficiencies in power consumption and user experience, as the backlight often remains on even when the display shows a blank or black screen, wasting energy and emitting unwanted light in low-ambient conditions.
Innovation Solution
A method and system that utilize detection logic to compare display signals to known data patterns, such as an array of all zeros, to control the backlight's operation, turning it off when a blank or black screen is detected and turning it on when non-zero values are present, thereby optimizing power usage and user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the backlight remains on continuously to ensure display visibility, then the display visibility is maintained, but the power consumption increases and unwanted light is emitted in low-ambient conditions
Solution Approach 1:
The backlight operation is made dynamic by continuously monitoring display content and adjusting backlight state accordingly. The system transitions from a static always-on state to a dynamic state that adapts based on whether the display shows meaningful content or blank/black screens, resolving the contradiction between maintaining visibility and reducing power consumption.
Solution Approach 2:
The system implements feedback by detecting display content through data pattern recognition and using this information to control backlight operation. The feedback loop monitors the display signal for known patterns (such as blank or black screen patterns) and adjusts backlight state based on the detection results, optimizing power consumption while maintaining visibility when needed.
2Use of energy by moving object
If the backlight is turned off to save power when displaying blank or black screens, then power consumption is reduced, but the display cannot show content when needed
Solution Approach 1:
The system performs preliminary detection of display content before controlling the backlight. By analyzing the display signal for known data patterns indicating blank or black screens, the system determines in advance whether backlight operation is necessary, preventing unnecessary power consumption while ensuring the backlight remains on when content needs to be displayed.
Solution Approach 2:
The feedback mechanism continuously monitors display content and adjusts backlight state accordingly. When the detection logic identifies patterns corresponding to blank or black screens, it triggers backlight shutdown; when content is detected, the backlight remains operational, thus maintaining reliability while optimizing power usage.
3Use of energy by moving object
If detection logic is added to monitor display content and control backlight operation, then power consumption is optimized, but the device complexity increases
Solution Approach 1:
The display controller is given multiple functions: it not only generates and manages display signals but also performs content detection for backlight control. By making the controller universal and multi-functional, the patent avoids adding separate dedicated detection hardware, thus optimizing power consumption without proportionally increasing device complexity.
Solution Approach 2:
The content detection functionality is merged with the existing display control system. Rather than implementing a separate independent detection system, the patent combines the detection logic within the display controller or product controller that already manages display operations, reducing overall system complexity while achieving power optimization.
Data Source
AI summary
An electronic device, a display control system, and a method for controlling operation of a display unit of an electronic device. The method includes generating a display signal by a display controller. The display signal is interpreted by the display unit to display a content of the display signal on a display panel of the display unit. The content of the display signal is compared to a known data pattern. The display unit is operated in accordance to an operating parameter corresponding to the known data pattern if the known data pattern is detected in the display signal.