Display Pixel Bank Protrusions for ILED Light Alignment
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Solution Overview
Problem
Existing display devices face challenges in improving the lighting efficiency of pixels, particularly in inorganic light-emitting diode (ILED) displays, which are durable in high-temperature environments but require enhancements in light emission efficiency.
Innovation Solution
The display device incorporates a substrate with via insulating layers featuring protrusions between inner banks, which are thinner than the inner banks, and includes light-emitting elements in the gaps between these protrusions, enhancing alignment and light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inorganic LEDs are used as fluorescent material, then durability in high-temperature environment and blue light efficiency are improved, but lighting efficiency of pixels requires enhancement
Solution Approach 1:
The patent applies local quality by creating protruding portions with specific thickness variations in the via insulating layer. These protruding portions have different thicknesses (first thickness less than second thickness) to locally optimize the structure for better light emission efficiency while maintaining the durability of inorganic LEDs throughout the display device.
Solution Approach 2:
The patent introduces a vertical dimension variation through protruding portions that extend from the via insulating layer. This dimensional change creates height differences and spatial variations in the pixel structure, allowing light-emitting elements to be positioned optimally for enhanced lighting efficiency while preserving the inherent durability of inorganic LED materials.
2Productivity
If via insulating layer includes protruding portions with varying thickness, then alignment and lighting efficiency of light-emitting elements is improved, but device structure complexity increases
Solution Approach 1:
The via insulating layer is segmented into different thickness regions, creating protruding portions with first and second thicknesses. This segmentation allows the structure to provide varied alignment references for light-emitting elements without requiring entirely separate alignment components, thus improving lighting efficiency while limiting the increase in overall device complexity.
Solution Approach 2:
The protruding portions of the via insulating layer serve multiple functions: they provide structural support, enable precise alignment of light-emitting elements, and enhance lighting efficiency. By making the via insulating layer perform these multiple functions through its varied thickness profile, the patent reduces the need for additional separate components, thereby improving lighting efficiency without proportionally increasing device complexity.
Data Source
AI summary
A display device includes a substrate; a via insulating layer on the substrate; and a first inner bank and a second inner bank on the via insulating layer and spaced from each other, wherein the via insulating layer includes a protruding portion located in a gap between the first inner bank and the second inner bank, and protruding from a top surface of the via insulating layer, and a thickness of the protruding portion is less than a thickness of the first inner bank and a thickness of the second inner bank.