Bidirectional LED Driver for Warm White Light via Power-Line Pulse Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current LED color light systems controlled by power-line edge signals can only conduct current in one direction, limiting their spectral range and preventing the achievement of warm white colors when reverse current is not allowed.
Innovation Solution
A bidirectionally illuminating light source and control apparatus that utilize power-line pulse signals to enable both forward and reverse currents, allowing for a wider spectral range by including a reverse light emitting module and an LED driver with a reverse current blocking module, connected in parallel between power lines, and controlled by an operation module that performs computations based on pulse signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current is conducted only in one direction from fixed end to other end, then the LED driver can control LED color light group according to power-line pulse signals, but reverse current cannot drive LEDs of other color ranges to achieve wide spectral effect
Solution Approach 1:
The patent applies dynamics by making the current conduction direction changeable. The LED driver circuit is designed to dynamically switch between forward current conduction mode and reverse current conduction mode based on the polarity of the input signal. When positive voltage is detected, the circuit conducts current forward to drive RGB LEDs; when negative voltage is detected, the circuit switches to reverse conduction mode to drive warm white LEDs, thus achieving dynamic adaptation to different current directions and expanding the spectral range.
Solution Approach 2:
The patent applies universality by designing the LED driver to perform multiple functions through a single circuit structure. The same driver circuit can handle both forward current conduction for RGB color lights and reverse current conduction for warm white lights. This is achieved by incorporating bidirectional switching elements and detection circuits that enable the single driver to universally control different LED types based on signal polarity, eliminating the need for separate drivers for different LED configurations.
2Ease of manufacture
If only forward current is allowed, then the LED driver can be simplified, but warm white color cannot be achieved through reverse current
Solution Approach 1:
The patent applies universality by designing the LED driver to perform multiple functions through a single circuit structure. The same driver circuit can handle both forward current conduction for RGB color lights and reverse current conduction for warm white LEDs. This is achieved by incorporating bidirectional switching elements and detection circuits that enable the single driver to universally control different LED types based on signal polarity, eliminating the need for separate drivers for different LED configurations.
Solution Approach 2:
The patent applies dynamics by making the current conduction direction changeable. The LED driver circuit is designed to dynamically switch between forward current conduction mode and reverse current conduction mode based on the polarity of the input signal. When positive voltage is detected, the circuit conducts current forward to drive RGB LEDs; when negative voltage is detected, the circuit switches to reverse conduction mode to drive warm white LEDs, thus achieving dynamic adaptation to different current directions and expanding the spectral range.
3Adaptability or versatility
If bidirectional current flow is enabled, then the spectral range is expanded to include warm white colors, but the device complexity increases
Solution Approach 1:
The patent applies merging by combining the forward current driving circuit and reverse current driving circuit into a single integrated LED driver. Instead of using separate drivers for RGB LEDs and warm white LEDs, the patent merges both functions into one driver that uses bidirectional switching elements and polarity detection to control both types of LEDs. This merging approach expands the spectral range while minimizing the increase in device complexity by sharing common components such as the control unit and power management circuitry.
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 solution expands the spectral range of LED color light systems, enabling the production of warm white and other colors by allowing bidirectional current flow with only a power wire and ground wire, enhancing the performance and versatility of LED light strings and control apparatus.
Implementation Method 1
the LED driver drives the LED color light group according to the power-line pulse signals loaded on the power lines
Implementation Method 2
when the voltage level of the first port of the power lines is lower than that of the second port, the reverse light emitting module operates
Data Source
AI summary
A bidirectionally illuminating light source triggered by power-line pulse signals includes a first light emitting module triggered by power-line pulse signals and a reverse light emitting module, which are connected in parallel between a first port and a second port of the power lines. The first light emitting module triggered by power-line pulse signals comprises an LED color light group and an LED driver. When the voltage level of the first port of the power lines is higher than that of the second port, the LED driver drives the LED color light group according to the power-line pulse signals loaded on the power lines; when the voltage level of the first port of the power lines is lower than that of the second port, the reverse light emitting module operates. A bidirectional emitting light string and control apparatus triggered by power-line pulses are also provided.