Electrode Light-Blocking Layout for Low-Reflection LED Displays
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Solution Overview
Problem
Display devices face challenges in reducing external light reflection from electrodes, which affects the visibility and efficiency of light emission, particularly in inorganic light-emitting diode displays.
Innovation Solution
A display device incorporating a light-blocking layer with a light-blocking portion and opening patterns is disposed on the electrodes to absorb external light and direct emitted light efficiently, using materials like chromium oxide or molybdenum oxide, and a reflective portion to enhance light concentration in emission areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light-blocking layer is disposed on the entire electrode surface, then external light reflection is reduced, but light emission efficiency is decreased due to blocking of emitted light
Solution Approach 1:
The light-blocking layer is segmented into a light-blocking portion and opening patterns. The light-blocking portion covers specific areas of the electrode to reduce external light reflection, while the opening patterns create transparent regions that allow emitted light to pass through, thus resolving the contradiction between reducing reflection and maintaining emission efficiency
Solution Approach 2:
Different regions of the light-blocking layer have different optical properties. The light-blocking portion has high light absorption/reflection properties to reduce external light reflection, while the opening patterns have high transparency to allow emitted light to pass through, applying local quality differentiation to resolve the contradiction
2Illumination intensity
If the light-blocking layer covers the entire electrode, then visibility of emitted light is improved by reducing reflections, but the area for light emission is reduced
Solution Approach 1:
The light-blocking layer is divided into light-blocking portions and opening patterns. The opening patterns are strategically positioned to maintain adequate emission area while the light-blocking portions reduce reflections to improve visibility, thus resolving the contradiction between visibility and emission area
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 effectively reduces external light reflection, improves light efficiency per pixel, and enhances the visibility of emitted light by concentrating it within the emission areas.
Implementation Method 1
The light-blocking layer may include a light-blocking portion absorbing light
Implementation Method 2
a reflective portion to enhance light concentration in emission areas
Data Source
AI summary
A display device includes a first electrode and a second electrode that are spaced apart from and facing each other; a light-blocking layer disposed above the first electrode and the second electrode; and at least one light-emitting element disposed between the first electrode and the second electrode. The light-blocking layer includes a light-blocking portion absorbing light and an opening pattern. The light-blocking portion includes an area partially overlapping the first electrode and the second electrode. The at least one opening pattern exposes portions of the first and second electrodes facing each other and at least a portion of an area between the first and second electrodes facing each other. The at least one light-emitting element overlaps the at least one opening pattern.