Display Pixel Capacitor Tuning for Hole-Area Brightness Uniformity
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Solution Overview
Problem
The disposition of a camera or sensor in a display apparatus leads to a load difference between the hole area and its surroundings, causing brightness deviation and a reduction in brightness.
Innovation Solution
A display apparatus design with a first area including a hole and a second area around it, where pixels in both areas have capacitors with different capacitances, and a pixel structure incorporating specific transistors and capacitors to maintain uniform brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hole is disposed in the display apparatus for camera or sensor placement, then the display apparatus can integrate camera/sensor functions, but brightness deviation and brightness reduction occur in the hole area
Solution Approach 1:
The patent applies local quality by differentiating the capacitor structure between the first area (with hole) and second area (without hole). Pixels in the first area are equipped with capacitors having different configurations (different electrode areas, dielectric layer structures, or both) compared to pixels in the second area, thereby compensating for the load difference caused by the hole and achieving uniform brightness across different regions
Solution Approach 2:
The patent changes physical parameters of the capacitor to compensate for the hole-induced load difference. Specifically, the capacitor in the first area has different capacitance values achieved by varying electrode areas (first electrode area vs. second electrode area) and dielectric layer properties, which adjusts the electrical characteristics to maintain consistent brightness despite the structural discontinuity introduced by the hole
2Ease of manufacture
If the capacitor structure is made uniform across all pixels, then manufacturing is simplified, but brightness deviation occurs between hole area and surrounding area
Solution Approach 1:
The patent implements local quality by creating region-specific capacitor designs. The capacitor in the first area (with hole) has differentiated structure(s) compared to the capacitor in the second area (without hole), allowing each region to be optimized for its specific electrical load conditions while maintaining overall manufacturing feasibility through systematic variation rather than complete redesign
Solution Approach 2:
The patent segments the display apparatus into two distinct areas (first area with hole, second area without hole) and assigns different capacitor configurations to each segment. This segmentation allows independent optimization of capacitor parameters for each region's specific requirements, addressing the brightness deviation problem through region-specific electrical compensation
Data Source
AI summary
A display apparatus is disclosed. The display apparatus includes a first area including a hole, a second area disposed around the hole, and a pixel disposed in each of the first area and the second area. The pixel includes an initialization voltage line, a first scan signal line, and a capacitor disposed between the initialization voltage line and the first scan signal line. The capacitor in the first area has a capacitance different from a capacitance of the capacitor in the second area.