Rearview Mirror Flashing Device with Double-Sided PCB
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Solution Overview
Problem
Existing rearview mirror assemblies with flashing or indicator light devices struggle to project light visible from both front and rear positions while complying with homologation requirements, particularly in terms of desired horizontal and vertical angles and luminous intensity.
Innovation Solution
A rearview mirror assembly featuring a double-sided printed-circuit board with LEDs, electrically connected to a feed and control system, positioned to project light through a transparent elongated passage in the mirror housing, achieving desired angles and intensity through careful arrangement and optical means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a tubular lamp is used in the rearview mirror casing, then the lamp can provide front and rear light exits, but the lamp occupies a great part of the casing and has a very specific shape
Solution Approach 1:
The patent divides the light source into multiple separate LED components (front LED and rear LED) positioned at different locations within the mirror housing. Each LED independently provides light in a specific direction, eliminating the need for a single complex tubular lamp structure while achieving multi-directional light emission.
Solution Approach 2:
The patent replaces the traditional mechanical tubular lamp structure with electronic LED components. This substitution allows for more flexible positioning and directional control of light without being constrained by the rigid geometric requirements of a tubular shape, thereby reducing structural complexity.
2Adaptability or versatility
If LEDs are used as flashing devices in the rearview mirror, then the flashes can be visible from both front and rear positions, but the light projection must comply with homologation requirements for angles and intensity
Solution Approach 1:
The patent positions LEDs at specific locations within the mirror housing and uses transparent portions of the cover at predetermined angles to direct light in specific directions. This localized arrangement ensures that light is projected at precise angles meeting homologation requirements while maintaining visibility from both front and rear positions.
Solution Approach 2:
The patent introduces transparent portions of the cover as intermediary elements between the LEDs and the external environment. These transparent portions are strategically positioned to redirect and control the light projection angles, ensuring compliance with homologation requirements while maintaining the desired visibility from multiple directions.
3Illumination intensity
If a double-sided printed-circuit board with LEDs is used, then light can be projected through a transparent elongated passage, but the board must be positioned perpendicular and transversely to the passage to achieve desired angles
Solution Approach 1:
The patent uses a double-sided printed-circuit board that can be positioned in multiple orientations (perpendicular and transverse to the elongated passage). This multi-dimensional positioning capability allows the LEDs on different sides of the board to project light through the transparent cover at various angles, achieving the desired light projection without requiring complex mechanical adjustments.
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
Ensures compliance with regulatory requirements by providing visible flashes from both directions with appropriate horizontal and vertical angles and luminous intensity, enhancing safety and functionality.
Implementation Method 1
a double-sided printed-circuit board, at least partly rigid, including at least one light emitting component in each of its sides, preferably LEDs
Data Source
AI summary
The invention relates to a rearview mirror assembly of an automotive vehicle with a flashing device comprising a first opening for the rearview mirror and a second opening in which an outer module is coupled inwardly defining an elongated passage delimited between two walls, an inner wall and an outer wall or cover. It further comprises a double-sided printed-circuit board transverse to the passage, including two light emitters in a first one of its sides and another light emitter in the other side and dividing the elongated passage into two areas. The emitters of the first side projects light along a first of the two areas, this light directly exiting by an end area with desired horizontal and vertical angles, and the other emitter does so along a second one of the two areas, the light exiting through the cover.