Vehicle Lamp Control Module Adaptive Luminance
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Solution Overview
Problem
Vehicle lamps with shared light sources for daytime running and position lamps require complex control to manage different luminance levels, especially when both are activated simultaneously, leading to challenges in efficient and adaptive lighting management.
Innovation Solution
A lamp control module with a signal processing device that executes software programs to control multiple light sources based on synchronization signals, switch-on requests, and a lookup table, allowing for adjustable luminance settings and easy adaptation to different specifications through programmable nonvolatile memory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single light source is shared between daytime running lamp and position lamp, then device complexity is reduced, but control difficulty increases when both functions are activated simultaneously
Solution Approach 1:
The patent segments the control of the shared light source by introducing multiple driving circuits (first driving circuit for daytime running lamp, second driving circuit for position lamp) that can independently control the light source based on different control signals, thereby resolving the control conflict when both functions are activated simultaneously
Solution Approach 2:
The patent introduces a control unit as an intermediary that receives control signals from both daytime running lamp control and position lamp control, processes them according to priority settings, and generates appropriate drive signals for the shared light source, thereby simplifying the control logic and resolving the contradiction
2Illumination intensity
If different luminance levels are required for daytime running lamp and position lamp, then lighting function is improved, but control complexity increases
Solution Approach 1:
The patent changes the luminance parameter of the shared light source dynamically by controlling the drive signal characteristics (current, pulse width) through different driving circuits, allowing the same light source to emit at different luminance levels suitable for daytime running lamp or position lamp functions without increasing hardware complexity
Data Source
AI summary
A vehicle lamp includes a turn signal lamp, a daytime running lamp, and a position lamp. A first driving circuit drives a first light source that is the turn signal lamp. A second driving circuit drives a second light source that serves as both the daytime running lamp and the position lamp. A signal processing device executes a software program to control the first driving circuit and the second driving circuit based on the turn synchronization signal, the first switch-on request, and the second switch-on request.