Automotive Luminous Device Driver Circuit with Mode Selection
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Solution Overview
Problem
Existing solutions for managing multiple lighting functions in automotive luminous devices are overly complex and costly due to the need for a driver element to manage two simultaneous inputs.
Innovation Solution
An electronic assembly with a driver element, a mode selection circuit, and input protection circuit that allows a single driver to control two mutually exclusive lighting functions by using a mode selection control signal to determine which light group receives power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a driver element manages two simultaneous inputs for multiple lighting functions, then the lighting device can provide multiple functions, but the complexity and cost increase excessively
Solution Approach 1:
The patent implements mutual exclusion between lighting functions dynamically - only one function can be active at a time. The driver element responds to control signals that activate one function while automatically deactivating others, creating a dynamic switching system that reduces complexity compared to managing all functions simultaneously
Solution Approach 2:
The control signal changes operational parameters of the driver element to switch between different lighting functions. By modifying the control signal state (active/inactive), the system transitions between different functional modes (first lighting function vs second lighting function), reducing the need for complex multi-input management
2Adaptability or versatility
If a driver element manages two simultaneous inputs for multiple lighting functions, then the lighting device can provide multiple functions, but the cost increases excessively
Solution Approach 1:
A single driver element is designed to perform multiple lighting functions through mutual exclusion. The same driver circuit controls both the first and second lighting functions by responding to control signals, eliminating the need for separate driver elements for each function and thereby reducing manufacturing costs
Solution Approach 2:
The patent merges the control of multiple lighting functions into a single driver element. By combining the first lighting function control and second lighting function control into one driver, the system reduces component count and associated manufacturing costs while maintaining functional versatility
Data Source
AI summary
The invention provides an electronic assembly for an automotive luminous device. The electronic assembly includes a first group of light sources, a second group of light sources, a driver element to control the operation of the light sources and a mode selection circuit. The mode selection circuit is configured to receive a mode selection control signal and to provide an output signal with a control value which depends on the mode selection control signal. The driver element includes a first input configured to receive power supply, a second input configured to receive the output signal of the mode selection circuit and an output received by the first group of light sources and by the second group of light sources, so that the operation of the first group of light sources and of the second group of light sources is controlled by the output of the driver element.