Reflective Display Panel with Grooved Fabry-Perot Cavity
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Solution Overview
Problem
Current display technologies face challenges in achieving high reflectivity and color filtering while maintaining low power consumption and cost-effectiveness, particularly in reflection-type display panels.
Innovation Solution
The display panel incorporates a substrate with arcuate grooves containing a semi-transmissive first metal electrode layer, a light-transmissive dielectric layer, and a non-transmissive second metal layer forming a Fabry-Perot cavity, filled with electronic ink containing black charged particles, along with point electrodes on an encapsulation substrate for voltage control, allowing for adjustable reflectivity and color filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a reflection-type display panel uses conventional structures, then manufacturing cost is reduced, but reflectivity and color filtering performance are insufficient
Solution Approach 1:
The reflective layer is segmented into multiple discrete reflective units, each corresponding to a groove, allowing independent control of reflectivity and color filtering for different regions while maintaining overall system functionality
Solution Approach 2:
The patent embeds multiple functional layers within grooves: electronic ink, semi-transmissive metal electrode layer, dielectric layer, and reflective layer are nested sequentially, creating a compact multi-functional structure that improves performance without proportionally increasing complexity
2Illumination intensity
If voltage control is applied to adjust reflectivity and color, then display quality is improved, but power consumption increases
Solution Approach 1:
The display uses bistable electronic ink particles that maintain their state without continuous power, applying voltage only during state transitions, thereby achieving color control with minimal power consumption
Solution Approach 2:
The patent changes the optical parameters (reflectivity, color filtering) by adjusting the voltage applied to the semi-transmissive metal electrode layer, which alters the Fabry-Perot cavity resonance conditions, enabling dynamic control without continuous energy input
3Illumination intensity
If Fabry-Perot cavity is used for color filtering, then color display performance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent adjusts the thickness parameters of the dielectric layer and metal electrode layer to optimize Fabry-Perot cavity performance, using specific thickness ranges (e.g., dielectric layer 50-200 nm, metal layer 10-50 nm) to achieve desired color filtering while accommodating manufacturing tolerances
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 reflectivity, reduces power consumption, and enables rich color displays by controlling the voltage applied to the electrodes, achieving efficient light filtering and emission across different wavelengths.
Implementation Method 1
the first metal electrode layer, the dielectric layer and the second metal layer form a Fabry-Perot cavity, and the Fabry-Perot cavity is configured to filter incident light
Implementation Method 2
the first metal electrode layer, the dielectric layer and the second metal layer form a Fabry-Perot cavity, and the Fabry-Perot cavity is configured to filter incident light
Implementation Method 3
the first metal electrode layer is semi-transmissive, the dielectric layer is light-transmissive, and the second metal layer is non-transmissive
Implementation Method 4
the first metal electrode layer is semi-transmissive, the dielectric layer is light-transmissive, and the second metal layer is non-transmissive
Implementation Method 5
a plurality of point electrodes disposed on the first encapsulation substrate, wherein the plurality of first grooves are in one-to-one correspondence with the plurality of point electrodes
Implementation Method 6
electronic ink filled within each of the plurality of first grooves, wherein the electronic ink includes black charged particles
Data Source
AI summary
A display panel includes: a substrate; a plurality of first grooves formed in a surface of the substrate; a second metal layer, a dielectric layer and a first metal electrode layer disposed in sequence within each of the plurality of first grooves; electronic ink filled within each of the plurality of first grooves; a first encapsulation substrate disposed on the surface of the substrate provided with the plurality of first grooves; and a plurality of point electrodes disposed on the first encapsulation substrate. The first metal electrode layer is semi-transmissive, the dielectric layer is light-transmissive, and the second metal layer is non-transmissive. The electronic ink includes black charged particles. The plurality of first grooves are in one-to-one correspondence with the plurality of point electrodes.