Display Device Dummy Units for Luminance Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices experience luminance differences due to varying load values on lines, leading to inconsistent images across regions with different pixel areas.
Innovation Solution
A display device design incorporating dummy units with sub-dummy units in peripheral regions to compensate for load value differences between scan and light emitting control lines, ensuring uniform luminance across regions with varying pixel areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If lines are extended to cover larger pixel regions, then the coverage area is improved, but the load value difference increases causing luminance inconsistency
Solution Approach 1:
The patent applies local quality by introducing dummy units with specific capacitance values at different locations (peripheral regions) to compensate for local load value differences. Each dummy unit is designed with appropriate capacitance to match the specific line length and load characteristics of its region, creating non-uniform local compensation that achieves global luminance uniformity across pixel regions of different sizes.
Solution Approach 2:
The patent changes the electrical parameter (capacitance) of the dummy units to compensate for load value differences. By adjusting the capacitance values of dummy units based on line lengths and regional characteristics, the system maintains consistent drive conditions across different pixel region sizes, resolving the luminance uniformity issue.
2Manufacturing precision
If dummy units are added to compensate for load value differences, then luminance uniformity is improved, but the device structure becomes more complex
Solution Approach 1:
The patent uses dummy units as intermediary elements that mediate between the signal source and the pixel regions. These dummy units act as buffer components that equalize the electrical load without requiring fundamental changes to the pixel structure or signal transmission paths, thus achieving luminance uniformity with minimal structural complexity increase.
Solution Approach 2:
The patent segments the compensation function into multiple distributed dummy units placed in peripheral regions rather than using a single centralized compensation mechanism. This segmentation allows each dummy unit to handle local load variations independently, simplifying the overall design while achieving comprehensive coverage and uniform luminance across the display.
Data Source
AI summary
A display device includes a substrate having a first pixel region, a second pixel region having a smaller area than the first pixel region, the second pixel region being connected to the first pixel region, and a peripheral region surrounding the first pixel region and the second pixel region, a first pixel and a second pixel respectively at the first and second pixel regions, a first line connected to the first pixel and a second line connected to the second pixel, and a dummy unit in the peripheral region, the dummy unit overlapping with at least one of the first and second lines, the dummy unit being configured to compensate for a difference between a load value of the first line and a load value of the second line, wherein the dummy unit includes at least two sub-dummy units spaced from each other.