Multi-Area Pixel Electrode Layout for Uniform Light Output
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Solution Overview
Problem
Current display devices face challenges in enhancing light output efficiency and uniformity due to the limitations in the structural arrangement and electrical connections of light emitting elements within pixels.
Innovation Solution
A display device design featuring a pixel structure with divided areas, specifically arranged sub-electrodes, light emitting elements, and bridge patterns with insulating layers, which allows for serial/parallel combinations of light emitting elements to enhance light output efficiency and uniformity by optimizing electrical connections and light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If light emitting elements are arranged in a conventional single-area pixel structure, then the device complexity is low, but the light output efficiency and uniformity are insufficient
Solution Approach 1:
The pixel is divided into multiple distinct areas (first area, second area, third area), each containing separate light emitting elements. This segmentation allows independent control and optimization of light emission in each area, improving overall light output efficiency and uniformity across the pixel while managing complexity through modular organization
Solution Approach 2:
The patent introduces a spatial dimension by dividing the pixel into multiple areas arranged in specific patterns. This multi-area configuration adds a dimensional aspect to the pixel structure, enabling better light distribution and output efficiency compared to conventional single-area designs
2Reliability
If light emitting elements are arranged in multiple divided areas with bridge patterns, then the light output uniformity is improved, but the device complexity increases
Solution Approach 1:
Bridge patterns serve as intermediary conductive structures connecting the first, second, and third areas within the pixel. These bridge patterns facilitate electrical connections between different area groups, ensuring uniform light output across the pixel while managing the complexity of multi-area electrical interconnections through dedicated intermediary pathways
Solution Approach 2:
The bridge patterns perform multiple functions: they provide electrical connections between different area groups, support the insulating layer structure, and enable the multi-area configuration to achieve uniform light output. This multi-functionality reduces the need for additional separate components, managing complexity while achieving reliability
3Reliability
If sub-electrodes are spaced apart with insulating layers, then the electrical connection reliability is improved, but the manufacturing complexity increases
Solution Approach 1:
The insulating layer is integrated with the bridge pattern structure, combining the insulation function with the conductive bridge structure. This merging of insulating and conductive elements into a unified multi-layer configuration improves electrical connection reliability between spaced sub-electrodes while streamlining the manufacturing process by reducing the need for separate insulation steps
Data Source
AI summary
A display device includes a display area including pixel areas; a non-display area; and a pixel provided in each pixel area. The pixel may include first to third areas divided from each other in a direction; first and second sub-electrodes provided in each of the first to third areas, and spaced apart from each other; light emitting elements provided in each of the first to third areas, and disposed between the first and second sub-electrodes; a bridge pattern disposed in each of the first to third areas under the first and second sub-electrodes of the corresponding area with an insulating layer disposed therebetween; a first contact electrode provided in each of the first to third areas on the first sub-electrode of the corresponding area; and a second contact electrode provided in each of the first to third areas on the second sub-electrode of the corresponding area.