Pixel Bank Conductive Pattern for Higher-Luminance Displays
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Solution Overview
Problem
Current display devices face challenges in enhancing luminance efficiency while simplifying the manufacturing process, particularly in the design and construction of pixels within the display panel.
Innovation Solution
The proposed display device incorporates a conductive pattern on the side surface of a bank surrounding an opening, which guides light emitted from a light-emitting element to an upper portion of a second electrode, and includes a method of manufacturing that involves forming transistors, electrodes, and light-emitting elements with intermediate layers to improve luminance efficiency and streamline the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a separate reflective member is added to guide light, then luminance efficiency is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent combines the reflective member function with the bank structure by forming a conductive pattern on the side surface of the bank. This integration eliminates the need for separate reflective members while maintaining light guiding functionality, thus improving luminance efficiency without increasing device complexity
Solution Approach 2:
The bank structure is given multiple functions: it serves as both a structural support element and a light guiding component through the conductive pattern. This multi-functionality reduces the total number of components needed in the display device while achieving the desired luminance efficiency
2Use of energy by moving object
If a separate reflective member is added to guide light, then luminance efficiency is improved, but manufacturing process complexity increases
Solution Approach 1:
The conductive pattern is formed on the bank side surface using existing manufacturing steps (forming the bank, then forming the conductive pattern in subsequent processing). This integrated approach eliminates the need for separate reflective member fabrication and assembly processes, simplifying the overall manufacturing process while maintaining light guiding functionality
Solution Approach 2:
The conductive pattern is formed on the bank side surface during the manufacturing process before final assembly. This preliminary formation of the reflective structure eliminates the need for post-assembly installation of separate reflective members, streamlining the manufacturing process
3Use of energy by moving object
If the conductive pattern area is increased to improve light guiding, then luminance efficiency improves, but the area available for other pixel components decreases
Solution Approach 1:
The conductive pattern is strategically positioned on the side surface of the bank where it can effectively guide light without occupying excessive pixel area. The pattern's location and dimensions are optimized to provide sufficient light guiding functionality while minimizing impact on the area available for other pixel components
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
This configuration enhances luminance efficiency by effectively guiding light and simplifies the manufacturing process by eliminating the need for separate reflective members, thereby improving the overall performance and production efficiency of the display device.
Implementation Method 1
The conductive pattern may include a first layer disposed on the first electrode and a second layer disposed on the first layer. Each of the first layer the and the second layer may include a metal that reflects a light emitted from the light-emitting element.
Data Source
AI summary
A display device includes pixels disposed on a substrate. Each of the pixels include a pixel circuit layer disposed on the substrate and includes at least one transistor, a first electrode disposed on the pixel circuit layer and electrically connected to the at least one transistor, a bank disposed on the first electrode, the bank including an opening exposing the first electrode, a conductive pattern disposed on a side surface of the bank surrounding the opening of the bank and the exposed first electrode, a light-emitting element disposed on the conductive pattern in the opening of the bank and electrically connected to the first electrode, and a second electrode disposed on the light-emitting element. The conductive pattern is a guide member that guides light emitted from the light-emitting element to an upper portion of the second electrode.