LED Substrate Groove Layout for Precise Diode Placement
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Solution Overview
Problem
Current organic light emitting diode (OLED) display technologies face challenges in achieving high luminous efficiency, long service life, and high product yield due to issues with power consumption, color deviation, and brightness stability.
Innovation Solution
A light emitting substrate with a groove structure in the electrode planarization layer, where first and second electrode strips are alternately arranged, allowing for the precise positioning and electrical connection of light emitting diodes, enhancing luminous efficiency and preventing defects like short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional OLED structures are used without groove structures, then the manufacturing process is simpler, but the positioning precision of light emitting diodes is insufficient leading to lower product yield
Solution Approach 1:
The electrode planarization layer is segmented by introducing groove structures that divide the layer into distinct regions. These grooves create physical boundaries that facilitate precise positioning of light emitting diodes, improving positioning precision while adding controlled structural complexity.
Solution Approach 2:
The groove structure acts as an intermediary element between the electrode planarization layer and the light emitting diodes. It provides a mechanical interface that enables accurate positioning and alignment, resolving the contradiction between simplicity and precision by introducing a mediating structural feature.
2Measurement precision
If electrode strips are closely arranged to increase density, then the display resolution is improved, but the risk of short circuits increases
Solution Approach 1:
The groove structures segment the electrode planarization layer, creating physical separations between closely arranged electrode strips. This segmentation allows higher density arrangement for improved display resolution while the groove boundaries prevent electrical short circuits between adjacent strips.
Solution Approach 2:
Material is extracted from the electrode planarization layer to form groove structures. These extracted regions serve as isolation barriers between electrode strips, enabling closer spacing for higher resolution while maintaining electrical isolation to prevent short circuits.
3Productivity
If light emitting diodes are positioned without precise calibration structures, then the manufacturing process is faster, but the luminous efficiency and brightness uniformity are reduced
Solution Approach 1:
The groove structures are formed in advance during the electrode planarization layer fabrication process, before light emitting diode placement. This preliminary action creates pre-defined positioning features that guide rapid and accurate placement, maintaining high manufacturing speed while ensuring precise calibration for uniform brightness.
Data Source
AI summary
A light emitting substrate and a display device are provided, the light emitting substrate includes: a base substrate: an electrode planarization layer, on the base substrate: an electrode layer, at a side of the electrode planarization layer away from the base substrate, the electrode layer includes a first electrode and a second electrode, the first electrode includes at least one first electrode strip, the second electrode includes at least one second electrode strip, the first electrode strip and the second electrode strip are spaced and alternately arranged in a first direction, each of the at least one first electrode strip and each of the at least one second electrode strip extend along a second direction, the electrode planarization layer includes a first groove between a first electrode strip and a second electrode strip which are adjacent to each other, the first groove is configured to accommodate a light emitting diode.