LED Display Insulating Patterns and Quantum Dot Color Conversion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices using light emitting diodes (LEDs) face challenges in achieving reliable color conversion and individual driving of light emitting elements, leading to limitations in luminance and color purity.
Innovation Solution
A display device comprising a light emitting array with insulating patterns for electrical insulation, a color conversion array with quantum dots for specific color conversion, and a printed circuit board for individual driving of light emitting elements, along with an adhesive layer for bonding, enabling improved color reproduction and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light emitting elements are arranged in a matrix form without insulating patterns, then device complexity is reduced, but electrical insulation between adjacent elements cannot be achieved
Solution Approach 1:
The device is segmented into distinct functional regions: light emitting elements, insulating patterns, and color conversion layers. The insulating patterns are specifically positioned between adjacent light emitting elements to provide electrical isolation, enabling reliable individual driving of each element while maintaining a structured matrix arrangement.
Solution Approach 2:
Insulating patterns serve as intermediary structures between adjacent light emitting elements. These patterns act as electrical barriers that prevent current leakage and interference between neighboring elements, allowing each element to be independently controlled without electrical crosstalk.
2Reliability
If color conversion layers are added for specific color conversion, then color purity is improved, but device complexity increases
Solution Approach 1:
Color conversion layers with specific quantum dot compositions are locally positioned corresponding to each light emitting element. Each color conversion layer is tailored to convert the blue light from its underlying LED to a specific color (red, green, or yellow), achieving high color purity through localized optical conversion rather than uniform conversion across the entire display.
3Manufacturing precision
If individual driving of light emitting elements is implemented, then luminance control is improved, but manufacturing complexity increases
Solution Approach 1:
The patent implements individual element addressing by extending contact electrodes in the third dimension (vertical direction) through adhesive layers. This allows each light emitting element to be independently connected to driving circuits without requiring complex lateral routing, simplifying the manufacturing process while enabling precise luminance control of each element.
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 color purity and reliability by allowing individual driving of light emitting elements and effective color conversion, resulting in improved luminance and display performance.
Implementation Method 1
a first quantum dot that converts blue light into red light
Data Source
AI summary
A display device comprises: a light emitting array including a plurality of light emitting elements on a substrate and an insulating pattern disposed between the light emitting elements; a color conversion array including a plurality of sub-color conversion parts corresponding to the respective light emitting elements; and a printed circuit board having a first contact electrode connected to each of the light emitting elements, the printed circuit board driving the light emitting elements, wherein the plurality of sub-color conversion parts include first to third sub-color conversion parts that convert the light provided from corresponding light emitting elements into lights of first to third colors and emitting the converted lights, wherein each of the plurality of light emitting elements is electrically insulated from an adjacent light emitting elements.