Pixel Electrode Layout for Aligned Rod LED Emission
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Solution Overview
Problem
Existing display devices face inefficiencies in utilizing light emitting elements for power alignment and emission, leading to suboptimal light source formation and power consumption.
Innovation Solution
A display device design featuring rod-type light emitting elements with insulating films and electrode layers, where light emitting elements are aligned and biased to maximize forward direction connections, reducing power consumption and enhancing light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light emitting elements are randomly arranged on the substrate, then the device complexity is reduced and manufacturing is simplified, but the power alignment efficiency and light emission efficiency deteriorate
Solution Approach 1:
The patent applies preliminary action by pre-forming insulating films on the substrate at specific positions before placing the light emitting elements. These pre-formed insulating films create predetermined connection regions that guide the alignment and electrical connection of light emitting elements during subsequent manufacturing steps, thereby improving power alignment efficiency without significantly complicating the manufacturing process
2Productivity
If light emitting elements are closely packed to maximize emission area, then the light source formation efficiency improves, but the risk of short-circuiting between adjacent elements increases
Solution Approach 1:
The patent applies segmentation by dividing the substrate surface into distinct regions using insulating films that are formed between adjacent light emitting elements. These insulating films create electrical isolation segments that prevent short-circuiting while allowing the light emitting elements to be closely packed for maximum emission area utilization
Solution Approach 2:
The patent uses insulating films as intermediary layers positioned between adjacent light emitting elements. These intermediary insulating films serve as electrical barriers that prevent direct contact and potential short-circuiting between neighboring elements, while still allowing the elements to be arranged in a closely packed configuration for efficient light source formation
3Reliability
If insulating films are added to prevent short-circuiting and improve alignment, then the reliability and power alignment efficiency improve, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies multi-functionality by designing the insulating films to serve multiple purposes simultaneously: they provide electrical isolation to prevent short-circuiting, create predetermined connection regions for improved power alignment, and serve as part of the overall device structure. This multi-functional approach improves reliability and alignment efficiency without proportionally increasing device complexity
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
A display device may include a pixel disposed in a display area. The pixel may include: a first electrode extending in a first direction; a second electrode including a first electrode part spaced apart from the first electrode in a direction intersecting with the first direction and extending in the first direction, a second electrode part extending from the first electrode part in a second direction, and a third electrode part extending form the second electrode part in the first direction; a third electrode including at least one area spaced apart from the third electrode part in the direction intersecting with the first direction and extending in the first direction; a first light emitting element connected between the first electrode and the second electrode; and a second light emitting element connected between the second electrode and the third electrode.