Automotive Lighting Status Detection via PWM Without Microcontrollers
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Solution Overview
Problem
Current automotive lighting control systems rely on expensive micro-controllers to manage and transmit status information, leading to increased costs due to the high number of electronic elements involved in control and management.
Innovation Solution
A detector device that generates a pulse-width modulation signal to encode the status of electronic elements, such as light sources, without using software elements like micro-controllers, utilizing a status detection unit, comparison signal generator, and comparison unit to communicate status information to a control unit through a reference signal and comparison signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If micro-controllers and software elements are used to provide status information of electronic devices, then the information provision is fast and reliable, but the total cost of the electronics system increases substantially
Solution Approach 1:
The patent extracts the status detection function from complex micro-controllers and implements it using simple hardware comparators and logic circuits. Each electronic device has its status detected by a dedicated comparator that generates a status signal, which is then processed by simple logic circuits to produce PWM output signals, eliminating the need for expensive micro-controllers while maintaining reliable status information provision.
Solution Approach 2:
The patent replaces expensive micro-controllers with inexpensive hardware components such as comparators, logic circuits, and PWM generators. These simple hardware elements can be mass-produced at low cost and provide sufficient functionality for status detection and communication without requiring the complex processing capabilities of micro-controllers.
2Productivity
If the number of electronic elements involved in control and management is increased to handle more tasks, then the control and management become fast and reliable, but the unitary cost is multiplied by a high number of devices
Solution Approach 1:
The patent merges multiple status detection and communication functions into a single integrated hardware circuit for each electronic device. The comparator, status signal generation, and PWM output functions are combined in one simple hardware block, eliminating the need for separate micro-controllers and reducing the total number of electronic components while maintaining fast and reliable control and management.
Solution Approach 2:
The patent creates a universal hardware circuit design that can detect and communicate the status of any electronic device (lights, indicators, sensors, etc.) using the same comparator-based architecture. This multi-functional approach allows a single type of simple hardware circuit to replace multiple specialized components, reducing overall system cost while maintaining high productivity.
Data Source
AI summary
The present invention refers to a detector device for detecting a status of at least a first electronic element of an automotive lighting device. This detector device comprises a status detection unit configured to detect a status of the at least first electronic element and to generate a reference signal which depends at least on the status of the first electronic element. It also comprises a comparison signal generator configured to generate a comparison signal and a comparison unit configured to generate a pulse-width modulation signal by comparing the reference signal with the comparison signal.