Mirror Display Luminance Control for Reflection Reduction
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Solution Overview
Problem
Mirror displays experience significant reflection issues in high external illuminance environments, causing obstruction to image viewing due to the mirror effect.
Innovation Solution
A display apparatus that includes a mirror display, a sensor, and a processor to adjust image signal luminance based on reflection and transmission characteristics, minimizing reflection effects by dividing the grayscale range into sections and applying different luminance adjustments to reduce the mirror effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mirror display is used to provide both mirror function and display function, then the display can serve dual purposes (mirror and screen), but the reflection effect becomes conspicuous and obstructs image viewing when external illuminance is high
Solution Approach 1:
The patent changes the luminance parameter of the image signal dynamically based on external illuminance conditions. When external light is strong, the system increases image luminance to compensate for the reflection effect, thereby maintaining image visibility while preserving the dual mirror-display functionality
Solution Approach 2:
The patent employs a feedback mechanism where the sensor detects external illuminance levels and provides this information to the processor. The processor then adjusts the image luminance accordingly, creating a closed-loop control system that automatically compensates for reflection effects based on real-time environmental conditions
2Reliability
If image luminance is increased to compensate for reflection effect, then image visibility improves in high illuminance environments, but color accuracy may deteriorate due to over-brightening
Solution Approach 1:
The patent applies different luminance adjustment strategies to different grayscale sections of the image. Rather than uniformly increasing luminance across all pixels, the system selectively adjusts luminance based on local grayscale values, thereby improving visibility in affected areas while preserving color accuracy in other regions
Solution Approach 2:
The patent segments the grayscale range into multiple sections and applies different luminance adjustment methods to each segment. This segmentation allows the system to optimize visibility compensation while minimizing color distortion by treating different brightness regions differently
3Object-affected harmful factors
If different luminance adjustment methods are applied to different grayscale sections, then reflection effect is minimized and image visibility is maintained, but processing complexity increases
Solution Approach 1:
The patent divides the grayscale range into multiple sections and assigns different luminance adjustment methods to each segment. This segmentation strategy effectively reduces reflection effects across different brightness levels while maintaining a structured and manageable processing approach
Solution Approach 2:
The patent applies luminance adjustment selectively to specific grayscale sections rather than to the entire image. By focusing processing efforts only on the sections most affected by reflection, the system achieves effective reflection reduction while avoiding unnecessary processing complexity
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
The solution effectively reduces the mirror effect in high illuminance environments, improving user convenience by maintaining or adjusting image visibility and minimizing color shifts.
Implementation Method 1
an amount of external light sensed through the sensor
Implementation Method 2
the mirror effect becomes conspicuous, causing obstruction to viewing of an image
Data Source
AI summary
Disclosed is a display apparatus. The display apparatus includes a mirror display, a sensor, a storage which stores transmission and reflection characteristics information of the mirror display, identify and a processor configured to a threshold and to output an image corresponding to the image signal on the mirror display based on the transmission characteristics information, reflection characteristics information, and an amount of external light sensed through the sensor, to adjust a luminance of a image signal based on whether a grayscale of the image signal is less than or equal to the threshold.