Automobile Rearview Mirror Touch Key Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Automobile interior rearview mirrors in prior art cannot simultaneously possess anti-glare functionality and touch key operation functionality due to the insulating effect of the electrically conductive layer in anti-glare mirrors, preventing the formation of a capacitive effect necessary for touch screen operations.
Innovation Solution
An automobile interior rearview mirror design featuring a PCB key strip with touchpads and metal sensor sheets connected to a CPU via a bonding pad and leading wire, positioned between a front frame and glass mirror, allowing capacitive effects to form and enabling touch key operations while maintaining anti-glare functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrically conductive layer is added to the glass to achieve anti-glare function, then anti-glare performance is improved, but touch key operation function deteriorates due to insulation
Solution Approach 1:
The patent divides the mirror system into separate functional layers: the glass mirror layer with electrically conductive coating for anti-glare function, and a separate PCB board with touch-sensitive switches for touch key operations. This segmentation allows each layer to independently perform its specific function without interfering with the other, resolving the contradiction between anti-glare performance and touch sensitivity.
Solution Approach 2:
The patent introduces a PCB board as an intermediary component between the user's touch input and the mirror system's control functions. The PCB board with its touch-sensitive switches acts as a mediator that can detect touch inputs through capacitive coupling without requiring direct electrical contact with the glass mirror's electrically conductive layer, thus enabling touch key operations while maintaining anti-glare functionality.
2Ease of operation
If touch keys are integrated into the mirror structure, then ease of operation is improved, but device complexity increases due to additional components
Solution Approach 1:
The PCB board serves multiple functions simultaneously: it provides structural support for the mirror assembly, houses the touch-sensitive switches for control operations, and contains the electrical circuitry for signal processing. This multi-functionality reduces the need for separate components, thereby managing device complexity while enabling touch key operations.
Solution Approach 2:
The patent merges the control circuitry, touch sensing elements, and structural support functions into a single integrated PCB board assembly. By combining these functions into one component rather than using separate parts, the overall device complexity is managed more effectively while still providing full touch key operational capability.
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 the realization of touch key operations in automobile interior rearview mirrors with anti-glare functionality by forming a capacitive effect between a human hand and metal sensor sheets, enhancing user interaction and improving safety and aesthetics by hiding key functions when not in use.
Implementation Method 1
a varying capacitive effect is formed between a finger and the copper sheet on the PCB board
Data Source
AI summary
Provided is an automobile interior rearview mirror for solving the problem that the existing automobile interior rearview mirrors usually cannot simultaneously have the anti-glare function and the touch key operation function, including: a front frame, a corresponding PCB key strip provided below the front frame, and a glass mirror provided below the PCB key strip, wherein the PCB key strip is provided thereon with PCB touchpads, the PCB touchpads each are provided thereon with a metal sensor sheet, the metal sensor sheets are connected with a rearview mirror CPU by a bonding pad via a leading wire.