Pixel Electrode Layout With Conductive Bridges to Prevent Off Failures
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Solution Overview
Problem
Current display devices face challenges in minimizing off failures and enhancing light output efficiency due to the complex arrangement and connection of light emitting elements.
Innovation Solution
A pixel structure is designed with a serial-parallel combination of light emitting elements, where each element is connected in a specific arrangement of electrodes and conductive patterns to prevent off failures and improve light output efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light emitting elements are arranged in a complex pattern to improve light output efficiency, then light emission performance is enhanced, but the risk of off failures increases
Solution Approach 1:
The emission area is divided into first and second areas with electrodes and light emitting elements arranged in distinct patterns. The first area has electrodes (1-1 to 4-1) arranged in a first pattern while the second area has electrodes (1-2 to 4-2) arranged in a second pattern, allowing independent optimization of light emission and failure prevention in each segment
Solution Approach 2:
Conductive patterns serve as intermediary elements that electrically connect adjacent electrodes (connecting electrode 2-1 to 3-1 in first area, and electrode 2-2 to 3-2 in second area). These conductive patterns provide alternative current paths that prevent off failures while maintaining the complex electrode arrangement for improved light output
2Illumination intensity
If electrodes are densely arranged to increase light emission density, then light output efficiency improves, but manufacturing precision requirements increase
Solution Approach 1:
The emission area is segmented into first and second areas with different electrode arrangements. The first area contains electrodes (1-1 to 4-1) spaced at first intervals while the second area contains electrodes (1-2 to 4-2) spaced at second intervals, allowing manufacturing tolerances to be managed in each segment separately rather than requiring uniform high precision across the entire emission area
Solution Approach 2:
Different electrode spacing and arrangement patterns are applied to different local areas (first area vs. second area) based on specific functional requirements. The first area uses one electrode configuration optimized for certain light emission characteristics while the second area uses a different configuration optimized for other characteristics, allowing local optimization without compromising overall manufacturing feasibility
Data Source
AI summary
A pixel may include first and second areas sectioned from each other in a first direction; 1-1-th to 4-1-th electrodes successively arranged in the first area in a second direction intersecting the first direction; 1-2-th to 4-2-th electrodes successively arranged in the second area in the second direction; light emitting elements disposed between two adjacent electrodes of the 1-1-th to 4-1-th electrodes of the first area; light emitting elements disposed between two adjacent electrodes of the 1-2-th to 4-2-th electrodes of the second area; a first conductive pattern disposed in the first area, and electrically connecting the 2-1-th and 3-1-th electrodes; a second conductive pattern disposed over the first and second areas, and electrically connecting the 4-1-th electrode of the first area with the 1-2-th electrode of the second area; and a third conductive pattern disposed in the second area and electrically connecting the 2-2-th and 3-2-th electrodes.