Segmented Light Control Sheet With Bridge Wiring Layout
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Solution Overview
Problem
Existing methods for dividing light control sheets into regions for improved designability and functionality face challenges such as surface roughness from cutting and complex wiring requirements from laser irradiation, leading to poor appearance and complicated voltage application.
Innovation Solution
A light control sheet design with conductive and non-conductive portions in transparent electrode layers, and a bridge portion connecting to a common wiring point, allowing for simplified voltage application and reduced wiring complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cutting device is used to divide the light control sheet into regions, then the sheet can be divided into multiple regions, but the transparent support layers are also cut causing rough surfaces and poor appearance
Solution Approach 1:
The patent introduces a sacrificial layer positioned between the transparent electrode layer and the transparent support layer. This sacrificial layer acts as an intermediary that is selectively removed in specific regions, allowing the transparent electrode layer to be separated from the support layer without cutting the support layer itself. The sacrificial layer enables precise region division while preserving the integrity and surface quality of the transparent support layers.
2Manufacturing precision
If laser irradiation is used to divide the light control sheet, then the transparent support layers are not cut, but the laser beam transmits through the light control layer insulating the transparent electrode layers requiring more wires
Solution Approach 1:
The sacrificial layer serves as a mediator that enables selective insulation of transparent electrode layers in specific regions without requiring laser irradiation through the entire stack. By removing the sacrificial layer in predetermined regions, the patent achieves region division and electrode insulation through structural design rather than deep laser processing, thereby avoiding the need for additional wires to penetrate through insulating layers.
Solution Approach 2:
The patent segments the transparent electrode layers into multiple regions by selectively removing the sacrificial layer in specific areas. This segmentation creates electrically isolated regions within the transparent electrode layers, allowing independent voltage application to different regions without requiring the laser beam to pass through insulating layers, thus reducing wiring complexity.
3Adaptability or versatility
If transparent electrode layers are fully conductive, then voltage application is simple, but region-specific control is difficult; if insulating portions are added, then region-specific control is improved but wiring complexity increases
Solution Approach 1:
The sacrificial layer acts as a temporary intermediary structure that, when selectively removed, creates insulating portions in the transparent electrode layers. This approach enables region-specific control by providing natural insulation between regions through the absence of the sacrificial layer, rather than requiring complex wiring arrangements to achieve electrical isolation.
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
Enables efficient switching between transparent and opaque states with simplified wiring and reduced complexity, while maintaining appearance quality and flexibility in design.
Implementation Method 1
A portion of the laminate sheet is irradiated from a first end to a position in front of a second end with a laser beam to form (i) a non-conductive portion that has a linear shape and (ii) a conductive portion that is divided by the non-conductive portion in each of the first and second transparent electrode layers
Implementation Method 2
The alignment state of the liquid crystal composition is changed depending on whether a voltage is applied to the pair of transparent electrode layers; thus, the light control sheet is switchable between a transparent state in which light is transmitted through the light control layer and an opaque state in which light is prevented from being transmitted through the light control layer by scattering or the like
Data Source
AI summary
A sheet region of a light control sheet has an insulating portion in which a non-conductive portion of each of a first transparent electrode layer and a second transparent electrode layer is located, and a light control in which a conductive portion of each of the first transparent electrode layer and the second transparent electrode layer is located and that is divided by the insulating portion. A second end region has a bridge portion that connects to the light control unit and extends in a strip shape along an outer edge of the light control sheet, and a second connection portion that extends from the bridge portion and connects to a second wiring portion. The conductive portion of the second transparent electrode layer is located in each of the bridge portion and the second connection portion.