LED Pixel Separation Member for Display Contrast and Flatness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display apparatuses face challenges in efficiently manufacturing and integrating light-emitting diodes (LEDs) with a pixel separation member to prevent color mixing and improve contrast, while maintaining a flat emission layer surface and efficient electrical connections.
Innovation Solution
A display apparatus is designed with a substrate, an emission layer containing LEDs, a planarization layer, and a thin-film transistor, where a pixel separation member made of an elastic material is used to surround the LEDs, providing light blocking properties and maintaining a flat surface, and electrodes are strategically positioned for electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a pixel separation member is introduced to surround LEDs and prevent color mixing, then contrast and light isolation are improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The pixel separation member is integrated directly with the LED structure, forming a unified component where the separation member surrounds the LED body and electrically connects to the electrode pad, eliminating the need for separate isolation structures between pixels
Solution Approach 2:
The pixel separation member serves multiple functions simultaneously: it provides light isolation to prevent color mixing, maintains flatness of the emission layer surface, and provides electrical connection paths, replacing multiple separate components with a single multi-functional element
2Productivity
If multiple LEDs are transferred onto a substrate with precise spacing, then manufacturing efficiency is improved, but positioning precision and alignment difficulty increase
Solution Approach 1:
The pixel separation members are pre-formed on the substrate with predetermined spacing and positions before the LEDs are transferred, providing pre-established alignment references that guide the precise placement of multiple LEDs during the transfer process
Solution Approach 2:
The pixel separation members act as intermediary structures that facilitate the transfer process by providing physical and electrical connection points, enabling synchronized transfer of multiple LEDs with precise spacing while maintaining alignment with the substrate electrode pads
3Ease of manufacture
If the emission layer surface is kept flat, then subsequent processing and assembly are simplified, but difficulty in maintaining surface flatness around LED structures increases
Solution Approach 1:
The pixel separation member is integrated with the LED structure and the emission layer, forming a unified flat surface where the separation member fills the space around the LED and maintains the overall planarity of the emission layer, eliminating steps to separately planarize around LED structures
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances manufacturing efficiency by allowing multiple LEDs to be transferred and integrated onto a substrate with precise spacing, reducing color mixing and improving contrast through effective light blocking and electrical connections.
Implementation Method 1
The pixel separation member may be a light blocking member
Implementation Method 2
The pixel separation member may include an elastic material
Data Source
AI summary
A display apparatus includes a substrate, an emission layer on the substrate; a planarization layer between the substrate and the emission layer; and a thin-film transistor between the substrate and the planarization layer. The emission layer includes a light-emitting diode (“LED”) electrically connected to the thin-film transistor, and a pixel separation member which surrounds the LED and is in contact with side surfaces of the LED.