Multi-Color Display Pixel Structure for Single-Process Bonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in manufacturing efficiency due to complex structures and the need for separate bonding processes for light-emitting elements of different colors.
Innovation Solution
A display device design that includes pixels with light-emitting elements emitting different colors, where these elements are formed on a single manufacturing substrate, and a bank or partition wall is formed simultaneously with the light-emitting elements, simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light-emitting elements of different colors are manufactured separately and then bonded together, then color accuracy and emission performance are improved, but manufacturing complexity and production time increase
Solution Approach 1:
The patent merges the manufacturing process of light-emitting elements of different colors by forming multiple quantum well structures with different composition ratios within a single semiconductor layer during one epitaxial growth process. This eliminates the need for separate manufacturing and bonding processes while maintaining color accuracy through precise control of indium composition ratios in different quantum well regions.
Solution Approach 2:
The patent creates a universal quantum well structure that can emit multiple colors by varying the indium composition ratio within the same semiconductor layer. The same basic structure serves multiple functions (emitting different colors) by adjusting material composition, eliminating the need for separate specialized structures for each color.
2Reliability
If multiple separate bonding processes are used for light-emitting elements of different colors, then emission performance is improved, but manufacturing efficiency and productivity decrease
Solution Approach 1:
The patent performs preliminary action by pre-forming multiple quantum well structures with different composition ratios within a single semiconductor layer during the epitaxial growth process. This preliminary integration of multiple color-emitting structures eliminates the need for subsequent separate bonding processes, thereby improving manufacturing efficiency while maintaining emission performance.
3Reliability
If complex multi-layer structures are used for light-emitting elements, then color control and emission quality are improved, but device thickness and structural complexity increase
Solution Approach 1:
The patent applies the nested doll principle by embedding multiple quantum well structures with different composition ratios within a single semiconductor layer. Instead of stacking separate thick layers for each color, the different color-emitting quantum wells are nested within one another in the same layer, reducing overall device thickness while maintaining color control and emission quality.
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 proposed solution results in a display device with a simplified structure, reduced thickness, and improved manufacturing efficiency by allowing light-emitting elements of different colors to be formed and bonded in a single process.
Implementation Method 1
a first light-emitting element disposed on the first electrode and electrically connected to the first electrode, the first light-emitting element including a first light-emitting layer emitting light of a first color
Data Source
AI summary
A display device includes pixels including a first pixel and a second pixel; a first electrode disposed in a light-emitting area of the first pixel; a first light-emitting element disposed on the first electrode and electrically connected to the first electrode, the first light-emitting element including a first light-emitting layer emitting light of a first color; a second electrode disposed in a light-emitting area of the second pixel; a second light-emitting element disposed on the second electrode and electrically connected to the second electrode, the second light-emitting element including a second light-emitting layer emitting light of a second color; and a bank disposed around the pixels to surround the light-emitting area of the first pixel and the light-emitting area of the second pixel, and including an inactive light-emitting layer of a same material as the first light-emitting layer.