Electrochromic Display CMY Stacked Pixel Units
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Solution Overview
Problem
Existing electrochromic display devices can only achieve black-and-white display, and when used as reflective colored display devices, the design significantly reduces reflectivity and color gamut due to the arrangement of RGB sub-pixels in parallel.
Innovation Solution
An electrochromic display device with a laminated design of cyan, magenta, and yellow structural units on transparent substrates, utilizing an electrochromic layer between common and pixel electrodes, which changes states based on applied voltage, allowing for full-color display without backlight, using organic polymer electrochromic materials and ionic liquids for enhanced color gamut and reflectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RGB sub-pixels are arranged in parallel for colored display, then color display capability is improved, but reflectivity and color gamut are significantly reduced
Solution Approach 1:
The patent transitions from a planar parallel arrangement of RGB sub-pixels to a three-dimensional stacked configuration. Multiple electrochromic layers (cyan, magenta, yellow) are stacked vertically between transparent electrodes, allowing each layer to contribute to color display while maintaining high reflectivity through the stacked architecture that enables ambient light to interact with all layers sequentially.
Solution Approach 2:
The patent employs a composite structure combining multiple electrochromic materials (cyan, magenta, and yellow polymers) in a stacked configuration. Each layer uses differently colored electrochromic materials that work together to achieve full-color display with wide color gamut (8.5% NTSC) while maintaining high reflectivity, as demonstrated by the composite optical properties of the stacked layers.
2Adaptability or versatility
If RGB sub-pixels are arranged in parallel for colored display, then color display capability is improved, but color gamut is significantly reduced
Solution Approach 1:
The patent transitions from a planar parallel arrangement of RGB sub-pixels to a three-dimensional stacked configuration. Multiple electrochromic layers (cyan, magenta, yellow) are stacked vertically between transparent electrodes, allowing each layer to contribute to color display while maintaining high reflectivity through the stacked architecture that enables ambient light to interact with all layers sequentially.
Solution Approach 2:
The patent employs a composite structure combining multiple electrochromic materials (cyan, magenta, and yellow polymers) in a stacked configuration. Each layer uses differently colored electrochromic materials that work together to achieve full-color display with wide color gamut (8.5% NTSC) while maintaining high reflectivity, as demonstrated by the composite optical properties of the stacked layers.
3Quantity of substance
If electrochromic layers are made thicker to improve color saturation, then color gamut is improved, but response time and switching speed are reduced
Solution Approach 1:
The patent transitions from a planar parallel arrangement of RGB sub-pixels to a three-dimensional stacked configuration. Multiple electrochromic layers (cyan, magenta, yellow) are stacked vertically between transparent electrodes, allowing each layer to contribute to color display while maintaining high reflectivity through the stacked architecture that enables ambient light to interact with all layers sequentially.
Solution Approach 2:
The patent employs ultra-thin electrochromic polymer films (100 nm to 5 μm thickness) in the stacked configuration. These thin films provide sufficient color saturation when stacked in multiple layers, while the reduced individual layer thickness enables faster ion transport and quicker response times, resolving the contradiction between color gamut and response speed.
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 device achieves a wide color gamut of 8.5% NTSC and improved reflectivity and resolution by using CMY pixel units, enabling full-color display through transmission and reflection of ambient light without active backlight, surpassing the limitations of RGB designs.
Implementation Method 1
the electrochromic layer is displayed in a transparent state or a colored state based on an applied voltage
Data Source
AI summary
The present application discloses an electrochromic display device and a manufacturing method thereof. The electrochromic display device includes a first transparent substrate and an electrochromic pixel arrays disposed on the first transparent substrate. The electrochromic pixel arrays includes a plurality of structural units superimposed longitudinally, and a second transparent substrate disposed on each of the structural units; the structural units include common electrodes, pixel electrodes, electrochromic layers, and electrolytes; the electrochromic layers are in a transparent state or a colored state based on an applied voltage; the structural units are independently selected from one of a cyan structural unit, a magenta structural unit, and a yellow structural unit; and the electrochromic pixel arrays includes the cyan structural unit, the magenta structural unit, and the yellow structural unit.