Display Device Dummy Parts Parasitic Capacitance Brightness
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Solution Overview
Problem
Display devices often experience brightness differences due to varying load values in lines and differences in pixel area sizes, leading to non-uniform image brightness.
Innovation Solution
A display device with a substrate featuring a first pixel area, a second pixel area with a smaller area connected to the first, and a peripheral area with a dummy part providing parasitic capacitance to compensate for load value differences between lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pixels are disposed in different sized pixel areas, then the display device can accommodate varying pixel densities and layouts, but brightness differences occur due to load value variations in lines
Solution Approach 1:
The patent applies local quality by introducing dummy parts with specific parasitic capacitance values at different locations corresponding to different pixel area sizes. Each pixel area (first, second, third) has tailored dummy parts with capacitances (e.g., 0.5fF, 1.0fF, 1.5fF) matched to their specific load requirements, creating location-specific compensation that maintains brightness uniformity across varying pixel densities
Solution Approach 2:
The patent changes the parasitic capacitance parameter of dummy parts to compensate for load value differences. By adjusting the capacitance values of dummy parts based on their position and the corresponding pixel area size, the system compensates for line load variations and maintains consistent brightness across pixels with different area sizes
2Shape
If line lengths vary across different pixel areas, then flexible display layouts are achieved, but load value differences cause brightness non-uniformity
Solution Approach 1:
The patent implements local quality by positioning dummy parts with specifically designed parasitic capacitance values at different locations within the display area. Each dummy part's capacitance is tailored to the local line load characteristics, compensating for brightness variations caused by different line lengths and pixel area shapes in specific regions
Solution Approach 2:
The patent applies preliminary anti-action by pre-compensating for anticipated brightness variations through carefully designed dummy parts. The parasitic capacitance values are calculated in advance to counteract the expected load value differences caused by varying line lengths and pixel area configurations, preventing brightness non-uniformity before it occurs
3Illumination intensity
If dummy parts are added to compensate for load differences, then brightness uniformity is improved, but device complexity increases
Solution Approach 1:
The patent merges the dummy parts with existing pixel structures and peripheral areas, integrating the compensation function into the overall display device architecture. The dummy parts are combined with pixel electrodes and surrounding structures, creating a unified design that achieves brightness uniformity without adding separate complex compensation systems
Solution Approach 2:
The dummy parts serve multiple functions: they provide parasitic capacitance for load compensation, maintain pixel electrode continuity, and integrate with peripheral area structures. This multi-functionality reduces the need for separate compensation components, thereby limiting the increase in device complexity while achieving brightness uniformity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves uniform brightness across the display device by compensating for load value differences, thereby reducing brightness variations and enhancing image quality.
Implementation Method 1
a dummy part disposed in the peripheral area, overlapping with at least one of the first line and the second line, and providing a parasitic capacitance that compensate for a difference in a load value between the first line and the second line
Data Source
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AI summary
An exemplary embodiment of the present disclosure provides a display device, including a substrate including a first pixel area (A1), a second pixel area (A2) having a smaller area than the first pixel area and connected to the first pixel area, and a peripheral area (PPA1, PPA2) surrounding the first pixel area and the second pixel area, a first pixel (PXL1) provided in the first pixel area and a second pixel (PXL2) provided in the second pixel area, a first line connected to the first pixel and a second line connected to the second pixel, a dummy part (DMP) disposed in the peripheral area, overlapping with at least one of the first line and the second line, and providing a parasitic capacitance that compensate for a difference in a load value between the first line and the second line; and a power supply line provided in the first pixel area and the second pixel area, wherein the dummy part includes an insulating layer having at least one contact hole.