Automotive Display Position Sensing via Capacitive Touch Detection
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Solution Overview
Problem
Existing automotive display systems face challenges in accurately recognizing the current position of vehicle interior displays without physical switches, particularly when the display is raised or at intermediate points, leading to impractical operation control processes.
Innovation Solution
A system utilizing a touch sensor with conductors inside the vehicle cockpit to generate capacitance changes, analyzed by a control unit to calculate position coordinate data and recognize the display's position without a separate physical switch, enabling accurate position recognition and left/right balance control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a stop switch is used to confirm display position, then the display position can be determined at specific points, but the position cannot be confirmed when the display is raised upwards or at intermediate points
Solution Approach 1:
The patent replaces the mechanical stop switch system with a capacitive sensing system. Conductors are disposed inside the vehicle cockpit to generate capacitance changes that are detected by a touch sensor on the display. This allows continuous position detection without mechanical contact points, enabling accurate position recognition at any intermediate position while eliminating the need for manual intervention to reset the display to initial position.
Solution Approach 2:
The patent introduces conductors as an intermediary element between the display and the detection system. These conductors generate capacitance changes that serve as a mediator to transmit position information to the touch sensor, enabling indirect but continuous position detection without requiring direct mechanical switches at each detection point.
2Reliability
If the display is moved to initial position to control the stop switch, then the physical position can be confirmed, but the operation control process becomes impractical and time-consuming
Solution Approach 1:
The patent implements continuous position detection through the capacitive sensing system. The conductors continuously generate capacitance changes as the display moves, and the touch sensor continuously detects these changes. This eliminates the need for periodic resetting to initial position, maintaining continuous reliable position confirmation while saving significant time during display operations.
3Measurement precision
If conductors are disposed inside the vehicle cockpit to generate capacitance changes, then continuous position detection is enabled, but the system complexity increases
Solution Approach 1:
The patent makes the touch sensor serve multiple functions: it acts as both the user interface for touch input and the position detection sensor. The same capacitive sensing mechanism used for touch interaction is also used to detect position-related capacitance changes from the conductors. This multi-functionality reduces overall system complexity while maintaining high position detection accuracy.
Solution Approach 2:
The patent merges the position detection function with the existing touch sensor system. Instead of adding a separate detection system, the conductors are integrated to work with the touch sensor, combining position detection and touch interaction into a unified capacitive sensing system. This reduces component count and system complexity while achieving continuous accurate position detection.
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 accurate measurement and control of the display's position and balance without a physical switch, improving operational efficiency and reducing control load through real-time position confirmation.
Implementation Method 1
conductors that are disposed inside a vehicle cockpit to generate a change in capacitance for the touch sensor
Data Source
AI summary
The present invention relates to a system and method for recognizing a position of an automotive display. The system for recognizing a position of an automotive display according to the present invention includes an automotive display having a touch sensor disposed on one side thereof, conductors that are disposed inside a vehicle cockpit to generate a change in capacitance for the touch sensor, and a control unit that obtains touch data according to the change in capacitance, analyzes a touch input pattern, and calculates position coordinate data and touch coordinate data of the automotive display.