Electrochromic Dimming Panel Uniform Shading via Localized Electrode Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing transparent display panels with dimming panels face challenges in achieving uniform shading due to variations in electrochromic layer resistance and electrode resistance, leading to incomplete blackening across the dimming panel area.
Innovation Solution
The electronic device incorporates a dimming panel structure with a first base, electrodes featuring mesh conductive and transparent conductive patterns, traces with varying line widths and voltage inputs, and an insulating layer to manage resistance and ensure uniform voltage distribution across the electrochromic layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the electrochromic layer changes from transparent state to light absorbing state, then the dimming panel contrast is improved, but the resistance of the electrochromic layer decreases causing non-uniform current distribution
Solution Approach 1:
The electrode resistance is made non-uniform across different regions to compensate for the changing electrochromic layer resistance. Specifically, the electrode connected to the anode has higher resistance in regions where the electrochromic layer resistance decreases more, while the cathode electrode has lower resistance in those same regions. This local variation in electrode resistance ensures uniform current distribution and uniform shading across the entire dimming panel area.
2Reliability
If the electrode resistance is increased to control current flow, then the shading uniformity is improved, but the driving current decreases affecting the switching speed
Solution Approach 1:
Instead of uniformly increasing electrode resistance, the invention applies local quality by creating region-specific resistance variations. The electrode resistance is higher in regions where the electrochromic layer resistance drops more during transition, and lower in regions where it drops less. This localized resistance adjustment maintains overall driving current while ensuring uniform current distribution across different regions, thus preserving switching speed while achieving uniform shading.
3Device complexity
If a simple electrode structure is used, then the device complexity is reduced, but the resistance control precision is insufficient for uniform shading
Solution Approach 1:
The invention maintains relatively simple electrode structures while achieving precise resistance control through local quality variations. The electrode resistance is adjusted in specific regions rather than requiring complex overall electrode designs. This approach allows for uniform shading while keeping the device structure relatively simple and manageable.
Solution Approach 2:
The invention achieves precise resistance control by changing the resistance parameter of the electrode in different regions. Specifically, the resistance values of the anode and cathode electrodes are adjusted according to the regional characteristics of the electrochromic layer resistance changes, enabling precise control of current distribution without requiring complex electrode structures.
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 enables the dimming panel to switch uniformly between transparent and shading modes, improving contrast and maintaining a transparent display effect while allowing background viewing.
Implementation Method 1
By controlling a voltage difference between the electrode of the first substrate and the electrode of the second substrate, the electrochromic layer may change from the transparent state to the light absorbing state
Data Source
AI summary
An electronic device includes a first base, a plurality of electrodes, a plurality of traces, an insulating layer, a second base and an electrochromic layer. The electrodes are disposed on the first base. Each electrode includes a mesh conductive pattern and a transparent conductive pattern. The mesh conductive pattern has a plurality of mesh lines and a plurality of meshes defined by the mesh lines. The transparent conductive pattern covers the mesh lines and the meshes, and is electrically connected to the mesh conductive pattern. The traces are disposed on the first base, and are electrically connected to the electrodes respectively. The insulating layer is disposed on the first base, and at least covers the traces. The second base is disposed opposite to the first base.