Reflective Pixel Electrode Layout for Accurate Display Luminance
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Solution Overview
Problem
Existing display devices face challenges in achieving accurate luminance and improving light emission efficiency.
Innovation Solution
A display device design featuring a reflection pattern protruding from a first electrode with a concave part, a light emitting element in the concave part, and a second electrode, with the reflection pattern spaced apart from the pixel defining layer, and an insulating layer between the reflection pattern and the second electrode, enhancing light reflection and emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a reflection pattern is added to improve light emission efficiency, then light emission efficiency is improved, but device complexity increases
Solution Approach 1:
The reflection pattern is integrated with the first electrode structure, merging the reflection function into the existing electrode rather than adding a completely separate component. This reduces device complexity while maintaining improved light emission efficiency through the concave reflective structure.
Solution Approach 2:
The first electrode serves multiple functions: electrical conduction and light reflection. By making the electrode itself reflective through the concave pattern, it performs both electrical and optical functions, avoiding the need for separate reflection components and thus reducing overall device complexity.
2Illumination intensity
If the reflection pattern protrudes upward to enhance light reflection, then light reflection is improved, but manufacturing precision requirements increase
Solution Approach 1:
The reflection pattern is designed with a protruding three-dimensional structure that extends upward from the electrode plane. This vertical dimensionality creates effective light reflection without requiring high precision in lateral positioning, as the reflective surface area and angle are controlled in the vertical dimension rather than requiring precise planar alignment.
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 design improves luminance accuracy and light emission efficiency by optimizing light reflection and emission pathways, resulting in enhanced display performance.
Implementation Method 1
The reflection pattern may include a metal which reflects light emitted from the light emitting element
Data Source
AI summary
A display device includes a first electrode is disposed on a substrate, a pixel defining layer disposed on the substrate in a non-emission area and defining an emission area, a reflection pattern protrudes upward from the first electrode in the emission area and forming a concave part on the first electrode, a light emitting element disposed in the concave part and electrically connected to the first electrode, and a second electrode disposed on the light emitting element and electrically connected to the light emitting element. The reflection pattern does not overlap the pixel defining layer in a plan view.