Vehicle Lamp Control Apparatus Sequential LED Timing
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Solution Overview
Problem
There is a need for a method to precisely control the sequential turn-on of light-emitting diode (LED) channels in vehicle lamps, which is essential for intuitively recognizing a vehicle's traveling direction and requires precise timing adjustments.
Innovation Solution
A vehicle lamp control apparatus that includes a timing generator to detect varying setting voltages and measure delay times, a lamp control circuit to control the sequential turn-on of LED channels using these delay times, and a constant current controller to ensure precise control of LED channel activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of LED channels is increased to support diversified vehicle lamp designs, then the lighting function and signaling function are enhanced, but the control complexity and difficulty of precisely controlling sequential turn-on increase
Solution Approach 1:
The patent applies parameter changes by using different capacitance values for external capacitors connected to each LED channel. The timing generator measures the time required for the capacitor voltage to reach a reference voltage level, which directly determines the delay time for each channel's turn-on. By adjusting the capacitance parameter, the sequential turn-on timing is precisely controlled without increasing overall system complexity.
2Measurement precision
If precise sequential turn-on control of LED channels is implemented, then the intuitive recognition of vehicle traveling direction is improved, but the control system complexity and timing adjustment difficulty increase
Solution Approach 1:
The timing generator automatically measures the delay time for each LED channel by detecting how long it takes for the capacitor voltage to reach the reference voltage. This self-measuring mechanism eliminates the need for manual timing calibration or complex adjustment procedures, achieving precise sequential turn-on control while maintaining ease of operation.
Solution Approach 2:
The system uses feedback by comparing the actual capacitor voltage against a reference voltage level. The timing generator continuously monitors the voltage rise and automatically determines when the reference level is reached, providing precise timing measurement without requiring external intervention or complex adjustment mechanisms.
3Manufacturing precision
If multiple external modules are used to set delay times for each LED channel, then the precision of sequential turn-on control is improved, but the device complexity and manufacturing complexity increase
Solution Approach 1:
The patent segments the timing control function by providing separate external capacitors for each LED channel. Each capacitor independently sets the delay time for its corresponding channel, allowing precise individual control while using simple, standardized components that are easy to manufacture and assemble.
Data Source
AI summary
The present disclosure discloses a vehicle lamp control apparatus. The vehicle lamp control apparatus includes a timing generator configured to detect first and second setting voltages, which are varied, and measure a time in which each of the first and second setting voltages reaches a reference voltage to generate first and second delay times, and a lamp control circuit configured to control sequential turn-on of LED channels using the first and second delay times.