Display Controller Brightness Correction for Visual Quality
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Solution Overview
Problem
Existing display devices that adjust maximum luminescence levels, such as LCDs, often compromise visual quality due to inadequate consideration of image properties when correcting brightness in response to changes in illuminance.
Innovation Solution
A controller system that acquires setting values and feature values related to image brightness, applying targeted corrections to image data to maintain optimal visual quality during changes in maximum luminescence levels, using a combination of pixel values and lookup tables to adjust brightness levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the illuminance of the backlight is lowered to reduce power consumption, then power consumption is reduced, but the brightness of the displayed image deteriorates
Solution Approach 1:
The patent applies parameter changes by adjusting the maximum luminescence level of the display device based on the backlight illuminance conditions. When backlight illuminance is low, the system changes the luminescence level parameter to compensate for the reduced brightness, thereby maintaining image quality while keeping power consumption low.
Solution Approach 2:
The patent implements preliminary action by pre-calculating and applying correction values to image data before display. The correction values are computed based on expected backlight illuminance levels and luminescence settings, so that when the image is displayed, the brightness is already optimized for the current conditions without requiring real-time adjustment.
2Illumination intensity
If a correction is applied to image data to maintain image brightness with lowered backlight illuminance, then image brightness is maintained, but visual quality of the image deteriorates
Solution Approach 1:
The patent applies local quality by differentiating correction strategies based on image characteristics. Instead of applying a uniform correction to all images, the system analyzes individual image properties and applies targeted corrections. This ensures that each image receives the appropriate level and type of brightness adjustment, preserving visual quality while maintaining brightness.
Solution Approach 2:
The patent implements dynamics by making the correction approach adaptive rather than static. The system dynamically adjusts the correction method based on the relationship between backlight illuminance, maximum luminescence level, and image characteristics. This dynamic adjustment allows the system to optimize visual quality for each specific display condition.
Data Source
AI summary
A controller configured to control a display unit configured to change a maximum luminescence level is provided, the controller including a setting acquirer acquiring a setting value associated with the maximum luminescence level, an image data acquirer acquiring target image data, a feature value acquirer acquiring a feature value correlated with a brightness of a target image expressed by the target image data, using pixel values contained in the target image data, a corrector applying to the target image data a correction for adjusting the brightness of the target image using the setting value associated with the maximum luminescence level and the feature value correlated with the brightness of the target image, and a display controller controlling the display unit to display the target image expressed by the corrected target image data.