Rearview Mirror Display Using Fluorophor Light Distribution
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Solution Overview
Problem
Existing rearview mirrors with display instrument functions have limited display areas, making it difficult for drivers to view essential vehicle parameters like speed and RPM without obstructing their view or compromising aesthetics.
Innovation Solution
A rearview mirror design incorporating LED lights, glue-filled fluorophors, and glass, where the fluorophors form a light-emitting area on the outer surfaces, allowing for a larger display area closer to the edge, and a control system using OBD, MCU, and LED lights to display information, along with a touch panel and sound module for dynamic feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a small LED screen, VFD screen or TFT liquid crystal screen is embedded in the interior rearview mirror, then the display function is achieved, but the display area is relatively small and cannot reach the edge of the rearview mirror
Solution Approach 1:
The patent replaces traditional mechanical display screens (LED, VFD, TFT) with an optical display system using light-emitting elements embedded in the mirror shell. This substitution eliminates the need for separate screen components and allows the display to extend to the edges of the mirror, achieving full-area display while simplifying the manufacturing process.
Solution Approach 2:
The patent merges the display function with the mirror shell structure itself. The light-emitting elements are embedded directly into the mirror shell, combining the structural component (mirror shell) with the display component, thereby eliminating the need for separate screen assemblies and enabling edge-to-edge display coverage.
2Area of stationary object
If LED characters are densely distributed at the margin of the LED screen, then information display is achieved, but the LED characters are relatively distant from the edge of the front shell and the display area is too small
Solution Approach 1:
The patent applies different light-emitting elements to different regions of the mirror shell. Edge regions use light-emitting elements that extend to the very edge for maximum visibility, while central regions use different configurations. This local differentiation allows the display to reach the edge while maintaining appropriate character density and visibility throughout.
Solution Approach 2:
The patent transitions from a two-dimensional screen-based display to a three-dimensional embedded display within the mirror shell structure. By embedding light-emitting elements throughout the shell thickness and distributing them across the surface, the display achieves edge-to-edge coverage while maintaining character visibility through spatial distribution in multiple dimensions.
3Ease of operation
If the instrument panel is located directly in front of the driver at a slightly lower position, then the display function is achieved, but the driver needs to avert his gaze and the instrument panel may be obscured by the steering wheel
Solution Approach 1:
The rearview mirror is given multiple functions: it serves as both the traditional rearview mirror and as the display instrument panel. By integrating the display function into the mirror itself, the system eliminates the need for a separate instrument panel, allowing drivers to view vehicle information within their existing field of view through the mirror without averting their gaze.
Solution Approach 2:
The rearview mirror acts as an intermediary between the driver and vehicle information. Instead of requiring direct line-of-sight to a separate instrument panel, the mirror mediates information delivery by displaying vehicle parameters within the mirror's reflective surface, which is already positioned in the driver's peripheral vision and cannot be obscured by the steering wheel.
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
The design provides a larger display area closer to the edge, enhancing visibility and aesthetics while allowing for dynamic feedback on vehicle parameters, improving driving safety and awareness.
Implementation Method 1
the glue-filled fluorophor comprises a body and an extension portion, the body is flush with the LED lights, the extension portion is located above the body and higher than the LED lights and a light-emitting area is formed on each of an outer surface of the body and an outer surface of the extension portion
Implementation Method 2
an interior of the glass is provided with an arc-shaped inner surface, and a reflected light channel is formed on one side of the glass facing the front of the vehicle; and light rays directed from the extension portion to the arc-shaped inner surface are reflected on the arc-shaped inner surface, and the reflected light rays emerge through the reflected light channel, thereby forming a light-emitting narrow edge in the front of the vehicle
Data Source
AI summary
A rearview mirror having a display instrument function and a control system thereof are provided. The rearview mirror includes LED lights, glass and a glue-filled fluorophor located between the LED lights and the glass. Light rays emitted from the LED lights pass through the glue-filled fluorophor and are directed towards the glass. The glue-filled fluorophor includes a body and an extension portion, the body is flush with the LED lights, the extension portion is above the body and higher than the LED lights. Light-emitting areas are formed on outer surfaces of the body and the extension portion. The control system of the rearview mirror includes an OBD, an MCU and LED lights. The OBD is configured to acquire information on rpm and vehicle speed, and transmits it to the MCU. The MCU receives the information, generates control information and transmits it to a corresponding LED light for display.