Display Electrode Layout to Prevent LED Alignment Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face issues with misalignment of light emitting elements due to electric field interference during the alignment process, leading to reduced product quality and manufacturing yield.
Innovation Solution
The display device incorporates a connection pattern layer and bridge pattern layers to prevent misalignment of light emitting elements by spacing them apart and overlapping specific conductive layers, thereby reducing electric field interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If voltage lines and data lines are closely spaced to increase pixel density, then manufacturing precision deteriorates due to electric field interference causing light emitting element misalignment
Solution Approach 1:
Connection pattern layers are introduced as intermediary conductive structures between voltage lines and light emitting elements. These pattern layers include contact holes and conductive traces that mediate the electrical connection while isolating the light emitting elements from direct exposure to strong electric fields from closely-spaced voltage lines, thereby preventing misalignment while maintaining high pixel density
Solution Approach 2:
The patent transitions from a planar two-dimensional wiring layout to a three-dimensional multi-layer conductive structure. Voltage lines are placed on lower layers while connection pattern layers with contact holes extend vertically to reach light emitting elements on upper layers. This vertical dimensionality change allows voltage lines to be closely spaced horizontally (increasing pixel density) while the vertical separation through insulating layers reduces electric field interference (maintaining alignment precision)
2Area of stationary object
If voltage lines are spaced closely to reduce device area, then reliability deteriorates due to increased electric field interference and misalignment risk
Solution Approach 1:
The conductive connection path is segmented into multiple discrete components: lower voltage lines on first layers, insulating layers for field isolation, connection pattern layers with contact holes, and upper conductive traces. This segmentation allows voltage lines to be closely spaced (reducing device area) while the insulating segments between layers block electric field interference (maintaining reliability and preventing misalignment)
Solution Approach 2:
The patent implements a nested multi-layer conductive structure where connection pattern layers are embedded within insulating layers. Contact holes penetrate through insulating layers to create vertical electrical pathways, while the insulating layers nest around these conductive elements. This nested arrangement allows compact horizontal spacing of voltage lines (reducing device area) while maintaining vertical field isolation (ensuring reliability)
Data Source
AI summary
A display device includes a first voltage line and a second voltage line extending in a first direction and spaced apart from each other in a second direction, a data line disposed between the first voltage line and the second voltage lines and extending in the first direction, a first electrode extending in the first direction and electrically connected to the first voltage line, a second electrode extending in the first direction and electrically connected to the second voltage line, light emitting elements on the first electrode and the second electrode, and a first connection pattern layer spaced apart from the first electrode and the second electrode and electrically connected to the first voltage line, and a second connection pattern layer electrically connected to the data line. The first connection pattern layer, the second connection pattern layer, the first electrode, and the second electrode are on a same layer.