Full Display Mirror Actuator Linkage Arm
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Solution Overview
Problem
Conventional rearview mirrors with integrated display systems face challenges in automatically switching between reflective and display modes without image competition, particularly when the display is inactive, leading to undesirable reflections that interfere with the driver's view.
Innovation Solution
A mechanism featuring a housing with an actuation system, including a mounting plate, wheels, and linkage arms, which automatically repositions the mirror and display substrate between active and inactive positions by rotating the mounting plate relative to the housing, allowing the reflective surface to orient towards the headliner when the display is inactive, reducing image competition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the display substrate is positioned in the active position to present images, then the driver can view rearward images, but the reflective surface creates image competition that interferes with the driver's view
Solution Approach 1:
The mirror system is divided into two functional substrates: a reflective substrate for traditional mirror functionality and a display substrate for electronic image presentation. These substrates are positioned at different orientations - the reflective substrate faces the driver while the display substrate is oriented toward the headliner, allowing both functions to operate simultaneously without image competition
Solution Approach 2:
The display substrate is rotated approximately 90 degrees relative to the reflective substrate, changing its orientation from facing the driver to facing the headliner. This dimensional repositioning allows the display to present images without creating reflective interference in the driver's direct view path
2Ease of operation
If the mirror substrate is manually adjusted for positioning, then the driver can optimize viewing angle, but the system lacks automatic switching between active and inactive positions
Solution Approach 1:
The system automatically switches between display mode and reflective mode without driver intervention. When the display needs to present images, the display substrate automatically orients toward the headliner; when images are not needed, it automatically returns to facing the driver, eliminating the need for manual adjustment
Solution Approach 2:
Manual mechanical adjustment is replaced with an automated actuation system that uses motors to rotate the display substrate between positions. This mechanical substitution enables automatic switching based on display activation state rather than requiring manual driver operation
3Illumination intensity
If the display substrate is oriented towards the driver to maximize visibility, then images are clearly visible, but reflections from the reflective surface create image competition
Solution Approach 1:
Different portions of the mirror assembly have different orientations optimized for their specific functions. The reflective substrate maintains its traditional orientation toward the driver for optimal reflective viewing, while the display substrate is oriented at approximately 90 degrees toward the headliner, allowing each component to perform its function without interfering with the other
Solution Approach 2:
The display function is extracted from the traditional mirror substrate and implemented as a separate display substrate. This separation allows the display to be positioned and oriented independently, facing the headliner rather than the driver, thereby eliminating the conflict between display visibility and reflective interference
Data Source
AI summary
A rearview mirror for a vehicle includes a housing defining an interior cavity and an open side. A substrate is rigidly coupled within the open side of the housing and has a reflective surface thereon. The rearview mirror further includes an actuation mechanism having a mounting plate rotatably coupled within the cavity of the housing at a first end of the mounting plate. A motor is rigidly coupled within the interior cavity of the housing adjacent a second end of the mounting plate. The motor has a first wheel coupled with an output shaft thereof, and the first wheel includes a pin coupled therewith that extends outwardly from the pin at a location offset from the output shaft of the motor. A first linkage arm is rotatably coupled between the pin of the first wheel and the second end of the mounting plate.