Display Luminance Correction via Sub-Element Deterioration Weights
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Solution Overview
Problem
Display devices face challenges in maintaining uniform luminance due to variations in the number and efficiency of light emitting elements within sub element groups, leading to luminance deviations across pixels.
Innovation Solution
A display device with a luminance corrector that calculates and corrects luminance values based on the deterioration degree of sub element groups by extracting deterioration values from sub driving currents, applying deterioration weights, and generating compensation data to ensure uniform luminance across pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the number of light emitting elements in sub element groups varies, then device complexity is reduced and manufacturing is easier, but luminance uniformity deteriorates
Solution Approach 1:
The patent applies local quality by dividing the light emitting unit into multiple sub element groups and assigning different deterioration weights to each group based on their specific characteristics (number of light emitting elements, sub driving current). This allows each sub element group to be corrected according to its local conditions, achieving uniform luminance across the entire display device despite variations in element distribution
Solution Approach 2:
The patent changes the parameter of deterioration weight for each sub element group based on the number of light emitting elements and sub driving current. By dynamically adjusting these parameters, the system compensates for variations in luminance characteristics, maintaining overall luminance uniformity while allowing manufacturing flexibility
2Adaptability or versatility
If sub element groups are divided with different numbers of light emitting elements, then adaptability is improved, but luminance uniformity deteriorates
Solution Approach 1:
The patent implements local quality by calculating and applying specific deterioration weights to each sub element group based on their individual characteristics. This allows the system to adapt to different configurations (varying numbers of light emitting elements) while maintaining uniform luminance through localized compensation
Solution Approach 2:
The patent segments the light emitting unit into multiple sub element groups and processes each group separately with its own deterioration weight. This segmentation enables the system to handle diverse configurations adaptively while ensuring overall luminance uniformity through individualized correction
3Device complexity
If luminance correction is not applied, then device complexity is reduced, but luminance reliability deteriorates
Solution Approach 1:
The patent implements feedback by calculating the actual luminance output of each sub element group and comparing it with the desired uniform luminance. The deterioration weights are determined based on this feedback, and correction values are applied to compensate for deviations, ensuring reliable and uniform luminance output
Solution Approach 2:
The patent performs preliminary action by pre-calculating deterioration weights for each sub element group based on their characteristics (number of light emitting elements, sub driving current). This preliminary correction is applied before display operation, ensuring luminance reliability from the start without requiring complex real-time adjustment mechanisms
Data Source
AI summary
A display device according to an embodiment includes a pixel including a light emitting unit, a data driver that supplies a data voltage to the pixel, and a luminance corrector that corrects image data and generates compensation data corresponding to the data voltage. The light emitting unit includes at least one sub element group. The at least one sub element group includes light emitting elements. The luminance corrector extracts a deterioration value of the at least one sub element group and calculates a luminance value of the at least one sub element group according to a number of the light emitting elements included in the at least one sub element group.