Dynamic Display Brightness Regulation for Ambient Light
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Solution Overview
Problem
Mobile display devices struggle to adaptively regulate backlighting brightness across varying ambient light conditions, leading to reduced image contrast and inefficient power usage, as they typically rely on manual user adjustments and cannot fully block backlighting in dark environments.
Innovation Solution
A method and device that dynamically adjust the brightness dynamic range of display images based on ambient light conditions, using a mapping algorithm to regulate pixel brightness and histogram correction to enhance contrast and details, optimizing image quality and power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the brightness of backlighting is enhanced in bright environment, then the visibility of display image is improved, but the power consumption increases
Solution Approach 1:
The patent implements dynamic brightness regulation by continuously monitoring ambient light conditions and automatically adjusting the backlighting brightness level. The system transitions from static manual brightness settings to dynamic adaptive control, where the brightness is constantly optimized based on real-time environmental conditions, thereby improving visibility when needed while conserving power when ambient light is sufficient.
Solution Approach 2:
The patent employs a feedback mechanism where the display system monitors ambient light conditions and uses this information to automatically adjust backlighting brightness. This closed-loop control ensures that brightness is enhanced only when necessary (improving visibility) and reduced when ambient light is sufficient (conserving power), resolving the contradiction between display quality and power efficiency.
2Reliability
If the brightness of backlighting is increased to improve image visibility in bright environment, then the image contrast is improved, but the power for mobile device is consumed inefficiently
Solution Approach 1:
The system dynamically adjusts backlighting brightness based on real-time ambient light conditions, ensuring optimal image visibility only when necessary. This dynamic adaptation prevents unnecessary power consumption while maintaining reliable display performance across varying environmental conditions.
Solution Approach 2:
The patent changes the brightness parameter of backlighting based on ambient light conditions. By adjusting this key parameter dynamically, the system maintains image visibility reliability when needed while optimizing power efficiency by reducing brightness when ambient light provides sufficient illumination.
3Ease of operation
If manual brightness regulation is used, then the user can adjust display brightness, but the control manner is troublesome and superior display quality cannot be achieved
Solution Approach 1:
The display system performs self-service by automatically monitoring ambient light conditions and adjusting backlighting brightness without user intervention. This eliminates the troublesome manual control while achieving superior display quality through continuous adaptive optimization, resolving the contradiction between ease of operation and display quality.
Solution Approach 2:
The system uses feedback from ambient light sensors to automatically regulate brightness, replacing manual user control. This feedback-driven automation simplifies operation (improving ease of use) while maintaining optimal display quality across all lighting conditions.
4Reliability
If the liquid crystal material blocks backlighting completely in dark environment, then the image contrast is improved, but the dark state light leakage phenomenon occurs
Solution Approach 1:
Instead of attempting complete backlighting blockage (excessive action), the system applies partial action by dynamically adjusting brightness to appropriate levels for dark environments. This prevents the harmful light leakage effect while maintaining sufficient image contrast, as the backlight is reduced but not completely blocked.
Solution Approach 2:
The system changes the backlighting brightness parameter to suit dark environment conditions, avoiding the extreme of complete blockage. This parameter adjustment maintains image contrast while preventing light leakage artifacts that occur with total backlight suppression.
Data Source
AI summary
Techniques pertaining to dynamically regulating brightness of backlighting in display devices are disclosed. According to one aspect of the present invention, the brightness dynamic range of a display device is adjusted according to the current ambient viewing conditions. In order words, the original brightness dynamic range of the display image is mapped to the brightness dynamic range suitable for human eyes under the current ambient viewing conditions. The brightness of the display image is corrected according to a histogram to enhance the contrast and details of the display image, thereby a high quality displayed image can be presented under the current ambient viewing conditions.