Backlight Module Brightness Control via Ambient Light Detection
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Solution Overview
Problem
Conventional portable electronic devices lack effective backlight control, leading to discomfort when used in low-light environments, such as dark rooms or during nighttime notifications, as they often produce excessively bright displays.
Innovation Solution
The method involves using light sensors to detect ambient light brightness and control the backlight module to automatically adjust its brightness level based on predetermined thresholds and time intervals, allowing the device to enter a specific mode, such as low-light mode, to optimize display visibility in various situations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display backlight maintains high brightness for clear visibility, then the display content is easily visible, but the user experiences discomfort in dark environments
Solution Approach 1:
The patent implements dynamic backlight adjustment by detecting ambient light conditions and automatically switching between manual and automatic modes. The system continuously monitors environmental light levels and adjusts display brightness accordingly, transforming the static backlight system into a dynamic one that adapts to changing conditions. This resolves the contradiction by making brightness variable rather than fixed, allowing clear visibility when needed while preventing discomfort in dark environments.
Solution Approach 2:
The patent employs feedback mechanisms through light sensors that detect ambient light brightness and feed this information back to the control system. The system uses this feedback to automatically adjust backlight levels, creating a closed-loop control system. This feedback mechanism enables the display to respond appropriately to environmental conditions, maintaining visibility while avoiding excessive brightness in dark settings.
2Adaptability or versatility
If the display uses automatic brightness adjustment based on ambient light, then the display adapts to environmental conditions, but the device complexity increases
Solution Approach 1:
The patent implements self-service functionality where the display system automatically monitors ambient light conditions and adjusts its own backlight without requiring user intervention. The light sensor continuously detects environmental brightness and the control system autonomously makes adjustments, freeing the user from manual brightness control. This self-service approach enhances adaptability while managing complexity by automating the adjustment process.
Solution Approach 2:
The patent integrates multiple functions into the display system: ambient light sensing, automatic brightness adjustment, and manual mode selection all within a single unified system. The control circuit handles both sensing and adjustment functions, making the system multi-functional rather than requiring separate components for each function. This universality approach enhances adaptability while controlling overall system complexity through integration.
3Object-affected harmful factors
If the device enters low-light mode automatically after detecting darkness for a time period, then user comfort is improved, but the response time and detection operations increase
Solution Approach 1:
The patent implements preliminary detection by monitoring ambient light conditions over a predetermined time period before automatically switching to low-light mode. This advance detection and confirmation process ensures that the brightness adjustment is made proactively before user discomfort occurs. The system anticipates the need for brightness adjustment by detecting sustained dark conditions, resolving the contradiction by preparing in advance rather than reacting after discomfort begins.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively reduces the display brightness to a comfortable level for users in dark environments and prevents discomfort during nighttime use, enhancing user experience by automatically adjusting the backlight according to ambient conditions.
Implementation Method 1
utilizing at least one light sensor of the electronic device to detect ambient light brightness
Implementation Method 2
controlling a brightness level of a backlight module of a display panel
Data Source
AI summary
A method and apparatus for adjusting display backlight and an associated computer program product are provided. The method is applied to an electronic device. The method includes the steps of: utilizing at least one light sensor of the electronic device to detect ambient light; and performing a plurality of detection operations to selectively control the electronic device to enter a specific mode to adjust brightness level of a backlight module of a display panel of the electronic device. The detection operations includes: detecting whether the ambient light is less than a predetermined ambient brightness threshold value for a time period; and detecting whether a length of the time period reaches a predetermined time threshold value. For example, the specific mode can be a low-light mode, which is suitable for a user who has stayed in the dark for a time period (e.g. tens of minutes, or one or more hours).