Display Pixel Circuit Layout for Series LED Connection Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices face challenges in efficiently arranging and connecting light emitting elements to enhance power efficiency and reduce the likelihood of dark spot defects, particularly in the connection of first and second pixels in series or parallel configurations.
Innovation Solution
A display device design featuring multiple light emitting elements with a support layer, conductive pattern, and contact layer, where the support layer is positioned between the light emitting elements and includes an organic material, and a conductive pattern electrically connected to both the common electrodes and pixel electrodes, facilitating series connection of pixels through a contact layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If light emitting elements are connected in series, then power efficiency is improved, but the complexity of electrical connections increases
Solution Approach 1:
The display panel is divided into multiple pixel circuits, each containing light emitting elements connected in series. This segmentation allows independent control of each pixel while maintaining the power efficiency benefits of series connections. The support layer and conductive pattern are segmented to correspond with individual pixel circuits, enabling modular assembly and simplified manufacturing.
Solution Approach 2:
A support layer is introduced as an intermediary structure between the substrate and the light emitting elements. This support layer includes conductive patterns that facilitate electrical connections and mechanical support, simplifying the overall connection architecture while enabling series configurations of light emitting elements.
2Reliability
If light emitting elements are connected in parallel, then reliability is improved, but power efficiency deteriorates
Solution Approach 1:
Multiple pixel circuits are segmented across the display panel, with each circuit containing light emitting elements connected in series. This segmentation strategy maintains reliability through distributed architecture while achieving power efficiency through series connections within each segment.
Solution Approach 2:
The patent changes the electrical connection parameter from parallel to series configuration within each pixel circuit. This parameter change transforms the power consumption characteristics, enabling lower overall power usage while maintaining operational reliability through the modular pixel circuit design.
3Ease of manufacture
If conventional connection structures are used, then manufacturing simplicity is maintained, but dark spots due to short circuits increase
Solution Approach 1:
The support layer serves as an intermediary structure that provides both mechanical support and electrical isolation. It includes conductive patterns that are precisely positioned to connect light emitting elements without creating unintended short circuits, thereby eliminating dark spots while maintaining manufacturing simplicity through a systematic fabrication process.
Solution Approach 2:
The harmful short circuit paths are extracted and eliminated by introducing the support layer with precisely defined conductive patterns. This extraction removes the source of dark spots while preserving the essential manufacturing simplicity of the display device fabrication process.
Data Source
AI summary
A display device including multiple first light emitting elements disposed between first pixel electrodes and a first common electrode overlapping the first pixel electrodes, multiple second light emitting elements disposed between second pixel electrodes spaced apart from the first pixel electrodes and a second common electrode overlapping the second pixel electrodes, a support layer disposed between the first light emitting elements and the second light emitting elements and having a predetermined height, a conductive pattern disposed on the support layer, and a contact layer having an end electrically connected to the first common electrode and the another end electrically connected to the conductive pattern.