Display Device Dummy Line Compensation for Luminance Uniformity
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Solution Overview
Problem
Display devices face issues with uniform luminance due to differences in load values of lines, leading to variations in luminance across regions.
Innovation Solution
A display device design with a substrate featuring multiple pixel regions of varying sizes, including a first pixel region and adjacent smaller regions, utilizing dummy lines and dummy pixels in the peripheral regions to compensate for load value differences between lines, ensuring uniform luminance across the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If lines of different lengths are used to connect pixels in different pixel regions, then the display device can accommodate varying pixel region sizes, but luminance uniformity deteriorates due to load value differences
Solution Approach 1:
The patent applies local quality by introducing dummy pixels specifically in regions where luminance uniformity is compromised. These dummy pixels are strategically placed in the peripheral region and have different characteristics (such as different aperture ratios or electrode configurations) compared to regular pixels, allowing them to compensate for the load value differences caused by line length variations in specific local areas without affecting the overall display content.
Solution Approach 2:
The patent utilizes parameter changes by modifying the electrical characteristics of certain pixels through the introduction of dummy pixels. These dummy pixels have adjusted parameters such as capacitance, resistance, or aperture ratio that enable them to compensate for the cumulative load effects on longer lines, thereby balancing the voltage drops and maintaining uniform luminance across different pixel regions.
2Illumination intensity
If dummy pixels are added to compensate for load value differences, then luminance uniformity improves, but device complexity increases
Solution Approach 1:
The patent applies copying by creating simplified replica structures (dummy pixels) that mimic the basic pixel architecture but with modified parameters. These dummy pixels are essentially copies of the pixel structure with adjusted characteristics, allowing them to be integrated into the existing pixel array without requiring fundamentally new components or complex additional circuitry.
Solution Approach 2:
The dummy pixels serve multiple functions: they act as regular display pixels in terms of their structural integration into the pixel array, while simultaneously functioning as compensation elements that balance the electrical load across different regions. This multi-functionality reduces the need for separate compensation circuits or additional complex mechanisms.
Data Source
AI summary
A display device includes: a substrate including a first pixel region, at least one second pixel region having a smaller area than the first pixel region, the at least one second pixel region being disposed adjacent to the first pixel region, and a peripheral region surrounding the first pixel region and the second pixel region; first and second pixels respectively provided in the first and second pixel regions; first and second lines respectively connected to the first and second pixels; a dummy line connected to one of the first and second lines to extend to the peripheral region; and a first dummy part including a dummy pixel connected to the dummy line in the peripheral region.