Display Panel Groove Design for Leakage Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display panel manufacturing processes are complex and do not ensure high product reliability, particularly in terms of preventing lateral leakage currents and ensuring accurate color representation.
Innovation Solution
A display panel design that includes a base layer with a hole, a circuit layer with grooves and tip portions surrounding the hole, an element layer with a pixel defining layer and light emitting elements, and an encapsulation layer to cover the element layer, thereby simplifying the manufacturing process and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing display panel manufacturing processes are used, then production can proceed with conventional methods, but the manufacturing process remains complex and product reliability is not sufficiently improved
Solution Approach 1:
The pixel defining layer is segmented into multiple functional regions: a flat top surface for the emissive region, sloped side surfaces forming grooves for preventing lateral leakage currents, and a bottom surface. This segmentation allows each region to perform its specific function optimally while simplifying the overall manufacturing process by integrating multiple features into a single layer structure.
Solution Approach 2:
The pixel defining layer transitions from a conventional two-dimensional planar structure to a three-dimensional structure with varying depths. The grooves extend laterally at specific depths while the emissive region remains at a different elevation, creating a multi-level architecture that prevents lateral leakage currents without requiring additional separate layers.
2Manufacturing precision
If conventional pixel defining structures are used, then manufacturing is simpler, but lateral leakage currents cannot be effectively prevented and color representation accuracy deteriorates
Solution Approach 1:
The pixel defining layer exhibits local quality variations with different depths and slopes at different locations. The grooves are positioned specifically at lateral regions where leakage prevention is needed, while the central emissive region maintains a flat top surface for optimal light emission. This localized structural differentiation achieves both precision and manufacturability.
Solution Approach 2:
The pixel defining layer employs asymmetric depth distribution: the grooves extend to a greater depth than the emissive region, creating an asymmetric profile that effectively blocks lateral leakage currents while maintaining a flat top surface for the emissive area. This asymmetric design achieves superior electrical isolation without compromising manufacturing feasibility.
3Reliability
If additional layers are added to prevent leakage currents, then reliability improves, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The pixel defining layer serves multiple functions simultaneously: it defines the emissive region boundaries, creates grooves for electrical isolation to prevent lateral leakage currents, and provides a flat top surface for uniform light emission. By integrating these multiple functions into a single layer, the design achieves improved reliability without increasing device complexity or requiring additional separate layers.
Data Source
AI summary
Disclosed is a display panel which includes a base layer having a hole, a circuit layer disposed on the base layer and including a pixel circuit and a plurality of insulating layers, an element layer disposed on the circuit layer and including a light emitting element electrically connected to the pixel circuit and a pixel defining layer defining an emissive region, and an encapsulation layer covering the element layer. The circuit layer further includes a groove surrounding the hole, and the pixel defining layer includes a valley surrounding at least a portion of the emissive region. A bottom surface of the groove and side surfaces of the groove connected to the bottom surface are formed by an insulating layer among the plurality of insulating layers.