Display Device Brightness Uniformity via Pixel Capacitance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices with regions of different sizes and locations experience brightness differences due to varying load values on lines, leading to uneven image quality, and existing solutions like load matching capacitors increase dead space.
Innovation Solution
A display device with a substrate having regions of different sizes, where pixels and gate lines are connected, and a compensator adjusts image data based on correction values to balance brightness across regions, using a compensator that generates corrected image data by decreasing brightness in over-compensated areas and increasing it in under-compensated areas in boundary regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If load matching capacitors are connected to lines to equalize load values, then brightness uniformity is improved, but dead space area increases
Solution Approach 1:
The patent extracts the load matching function from separate capacitor components and integrates it into the pixel structure itself. The pixel electrode serves dual purposes: as the display element and as the load matching capacitor, eliminating the need for separate capacitor structures and reducing dead space area while maintaining brightness uniformity across the display panel
Solution Approach 2:
The pixel electrode is designed to perform multiple functions simultaneously: it acts as both the display pixel element and the load matching capacitor. This multi-functionality approach allows the same structure to provide both image display and electrical load equalization, thereby improving brightness uniformity without requiring additional dedicated capacitor space
2Adaptability or versatility
If regions with different sizes and locations are used in the display, then display flexibility is improved, but brightness uniformity deteriorates due to different line loads
Solution Approach 1:
The patent applies local quality by configuring pixel electrodes with different capacities in different regions of the display panel. Pixels in regions with shorter gate lines are assigned smaller capacitor capacities, while pixels in regions with longer gate lines are assigned larger capacities. This localized adaptation compensates for the varying line loads caused by different region sizes and locations, maintaining brightness uniformity across the entire flexible display
Data Source
AI summary
A display device including: a display unit including a substrate including a first region and a second region, first pixels are included in the first region, second pixels are included in the second region, first gate lines in the first region are connected to the first pixels, second gate lines in the second region are connected to the second pixels, and data lines are connected to the first and second pixels; and a compensator configured to compensate image data for the first and second pixels, based on correction values, and configured to generate corrected image data by decreasing a brightness of an over-compensated portion of the first and second pixels and increasing a brightness of an under-compensated portion of the first and second pixels in a boundary region between the first region and the second region.