Segmented Switchable Roof Panel With Integrated Segment Control
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Solution Overview
Problem
Existing segmented optically switchable panels in vehicle roofs require numerous individual connections to driver circuitry, lacking cost-effective connectors that meet automotive regulations, and high drive voltages necessitate complex transformations.
Innovation Solution
A transparent roof assembly with a segmented optically switchable panel, drive voltage circuitry, and switching circuitry, utilizing standard connectors and integrating switching circuitry on the transparent panel to manage individual segments, with drive voltage generation and protection against liquid and moisture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a segmented optically switchable panel is used to enable independent switching of multiple segments, then the functionality and versatility of the transparent roof assembly is improved, but the number of individual connections required increases, making the system more complex and less cost-effective
Solution Approach 1:
The patent combines multiple switching functions into a single integrated switching circuitry unit that controls all segments through a standardized connector. This merging approach reduces the number of individual connections required while maintaining the ability to independently switch multiple segments, directly resolving the contradiction between versatility and complexity.
Solution Approach 2:
The switching circuitry is designed as a universal control unit that can manage multiple segments through a single standardized interface. This multi-functional design allows the same circuitry to control different numbers and configurations of segments without requiring additional individual connections for each segment, thereby reducing system complexity while preserving adaptability.
2Power
If high voltage is applied to the optically switchable panel to achieve the desired optical state change, then the optical switching performance is improved, but the safety risks and regulatory compliance difficulties increase
Solution Approach 1:
The patent introduces a voltage transformation circuit as an intermediary between the vehicle's low-voltage battery and the high-voltage optically switchable panel. This intermediary component converts the safe low-voltage vehicle electrical system into the higher voltage required for optical switching, thereby maintaining safety while achieving the necessary power levels for effective optical state changes.
Solution Approach 2:
The system dynamically changes voltage parameters through transformation circuitry, converting from the vehicle's standard low-voltage DC supply to the higher voltage levels needed for optical switching. This parameter transformation allows the system to operate at optimal power levels for optical performance while maintaining compatibility with safe vehicle electrical standards.
3Device complexity
If the switching circuitry is integrated directly on the optically switchable panel to reduce connection complexity, then the device complexity is reduced, but the risk of moisture and liquid ingress increases
Solution Approach 1:
The patent nests the switching circuitry within a protective housing that is integrated with or mounted on the optically switchable panel assembly. This nested structure allows the circuitry to be physically close to the panel for reduced connection complexity while being protected from moisture and liquid ingress through the housing enclosure.
Solution Approach 2:
A protective housing or enclosure acts as an intermediary barrier between the switching circuitry and the external environment. This intermediary structure enables the circuitry to be positioned close to the panel for simplified connections while preventing direct exposure to moisture and liquids that could cause damage.
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 cost-effective and reliable operation of segmented optically switchable panels in vehicles, meeting automotive safety standards through standardized connections and efficient voltage management.
Implementation Method 1
the optical property of the optically switchable panel may be changed by application of an electric field
Implementation Method 2
an electrochromic panel is known
Implementation Method 3
The switching circuitry is arranged on the opaque area of the segmented optically switchable panel
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~4B
AI summary
A transparent roof assembly comprises a segmented optically switchable panel, a drive voltage circuitry and a switching circuitry. The drive voltage circuitry is configured to generate and supply a drive voltage for switching between a first optical state and a second optical state. The switching circuitry is configured to selectively operate the switchable segments corresponding to a command signal. The segmented optically switchable panel comprises a transparent area and an opaque area, wherein the switching circuitry is arranged on the opaque area of the segmented optically switchable panel.