Single-Channel LED Lamp Drive With Time-Division Multi-Function Control
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Solution Overview
Problem
Conventional multi-functional LED lamp driving systems require multiple LED drivers and intelligent power switches for each lamp function, leading to increased system costs and inefficiencies due to current deviations among LEDs when driven simultaneously.
Innovation Solution
A single channel-based multi-functional LED lamp driving system that uses a single LED lamp driving module to adjust input voltage and control light sources for different functions through time-division control, adjusting current values and duty ratios to manage high beam and daytime running lights simultaneously during high beam passing control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple LED drivers and intelligent power switches are used for each lamp function, then each lamp can be controlled independently, but system cost increases
Solution Approach 1:
The patent merges multiple LED drivers and intelligent power switches into a single integrated LED driver that controls multiple light source groups (daytime running lights, high beams, low beams) through time-division control. This consolidation eliminates redundant components and reduces system cost while maintaining independent control capability through sequential switching of different lamp functions.
Solution Approach 2:
The LED driver is designed with multi-functionality to perform multiple lamp control functions using a single device. The driver can sequentially drive different lamp groups (DRL, high beam, low beam) by receiving different control signals, making one device serve multiple purposes that previously required separate dedicated drivers and power switches for each function.
2Productivity
If multiple LEDs are driven simultaneously at the same voltage, then all LEDs can operate, but current deviation occurs due to LED variations causing brightness differences
Solution Approach 1:
Instead of driving multiple LED groups simultaneously, the system uses periodic action through time-division control where different light source groups are driven sequentially at different time intervals. The LED driver switches between driving DRL, high beam, and low beam groups in sequence, ensuring that only one group receives full current at a time, thereby eliminating current deviation issues while maintaining the appearance of simultaneous operation through rapid switching.
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
This approach allows for efficient time-divisional control of multiple LED lamps on a single channel, enabling simultaneous operation of daytime running lights and high beams while reducing system costs by eliminating the need for multiple LED drivers and intelligent power switches.
Implementation Method 1
a plurality of light emitting diodes (LEDs)
Implementation Method 2
a switching module configured to control on or off of the first light source group and the second light source group
Implementation Method 3
control light amounts of the first light source group and the second light source group by performing time-division control on an on or off time of the switching module
Data Source
AI summary
A single channel-based multi-functional light emitting diode lamp driving system includes: first and second light source groups distinguished for each lamp function thereof; a single LED lamp driving module adjusting an input voltage to a voltage required for each lamp function and to apply it to the first and second light source groups; a switching module controlling on or off of the first and second light source groups; and a control module controlling light amounts of the first and second light source groups by performing time-division control on an on or off time of the switching module in conjunction with the LED lamp driving module, wherein the control module is configured to perform time division turn-on control on the first and second light source groups by controlling at least one of a current value applied to the first and second light source groups or a duty ratio thereof in a high-beam passing mode.