Optical Glare Shield Filter Uniform Charging
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Solution Overview
Problem
Existing optical anti-glare filters with liquid crystal cells face challenges in achieving fast and homogeneous switching speeds due to uneven electrical charging, which affects their response time and darkening efficiency.
Innovation Solution
The implementation of multiple contact elements arranged at significant distances around the electrode layer units, allowing for uniform charging and rapid darkening, with additional contact elements on opposite sides of the liquid crystal cell to enhance switching speed and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single contact element is used for electrical contacting the electrode layer, then the device structure is simple, but the switching speed and homogeneity of switching speed distribution are insufficient
Solution Approach 1:
The single contact element is segmented into multiple contact elements (first contact element and second contact element) that are substantially spaced apart from each other. This segmentation allows for more uniform electrical charging across the electrode layer, resulting in improved switching speed and homogeneity of switching speed distribution without significantly complicating the device structure.
2Manufacturing precision
If contact elements are placed close together, then the device structure is compact, but the charging uniformity and switching homogeneity are poor
Solution Approach 1:
The contact elements are positioned at specific locations that are substantially spaced apart from each other, creating local quality differences in the electrical field distribution. This spacing arrangement ensures that different regions of the electrode layer receive more uniform charging, improving the overall homogeneity of switching speed distribution across the liquid crystal cell.
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 results in a significantly faster and more homogeneous response behavior, enabling rapid darkening within 100 μs and improving the overall performance of the anti-glare filter by ensuring uniform charging across the liquid crystal cell.
Implementation Method 1
at least one first electrode layer unit for aligning crystal molecules of the at least one liquid crystal layer
Implementation Method 2
at least one liquid crystal layer whose transmission can be switched
Data Source
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AI summary
The invention relates to an optical glare protection filter for a glare protection device (12a), comprising at least one liquid crystal cell (14a; 14b; 14c; 14d; 14e), which has at least one liquid crystal layer (16a; 16b) and at least one first electrode layer unit (18a; 18b) for aligning crystal molecules of the at least one liquid crystal layer (16a, 16b), and with at least one first contact element (20a; 20b; 20c; 20d; 20e) for electrically contacting the at least one first electrode layer unit (18a; 18b). It is proposed that the optical glare protection filter has at least a second contact element (22a; 22b; 22c; 22d; 22e) for electrical contacting of the at least one first electrode layer unit (18a; 18b), which is substantially spaced from the first contact element (20a; 20b; 20c; 20d; 20e).