LED Device with Parallel Strings for Dynamic Color Control
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Solution Overview
Problem
Existing LED lighting systems require frequent component replacement and upgrades to implement various functions, such as color temperature and brightness control, which increases waste and reduces user convenience.
Innovation Solution
An LED device comprising a first and second LED string with different color temperatures, a controller, and a switching circuit that adjusts brightness using PWM signals, connected to an LED driver, allowing for independent control of LED strings without replacing the driver or light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LED lighting systems use fixed functional components, then hardware reliability is improved, but adaptability deteriorates due to frequent replacement and upgrades needed for new functions
Solution Approach 1:
The patent implements dynamic functionality through software control rather than fixed hardware configurations. The lighting system can dynamically adjust color temperature, brightness, and operational modes through programmable controllers, allowing the same physical components to adapt to different functional requirements without replacement or upgrade.
2Adaptability or versatility
If LED lighting systems implement multiple functions through hardware additions, then functionality is improved, but device complexity worsens due to multiple components requiring replacement and upgrade
Solution Approach 1:
The patent applies multi-functionality by designing a universal lighting module that can perform multiple functions (lighting, color temperature adjustment, dimming, various lighting modes) through software control of a single integrated LED array. This eliminates the need for separate functional components and reduces overall system complexity while maintaining versatility.
3Manufacturing precision
If LED lighting systems allow independent control of LED strings, then brightness control precision is improved, but switching circuit complexity worsens
Solution Approach 1:
The patent segments the LED lighting system into multiple independently controllable LED strings or groups. Each string can be controlled separately through switching circuits to achieve precise brightness adjustment and color temperature mixing. The segmentation allows for fine-grained control while the switching circuit design is simplified through systematic organization of the segmented groups.
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
Enables the provision of multiple functions in LED lighting systems with reduced component replacement, enhancing user convenience and minimizing waste by allowing adjustments to color temperature and brightness through software control.
Implementation Method 1
a power supply connected to a first output terminal of the plurality of output terminals and configured to generate a first internal power voltage and a second internal power voltage using a driving power received from the LED driver via the first output terminal
Implementation Method 2
a controller configured to operate using the first internal power voltage and generate a PWM control signal based on a control command received from an external controller
Implementation Method 3
a first LED string configured to emit light having a first color temperature; a second LED string connected to the first LED string in parallel, and configured to emit light having a second color temperature
Data Source
AI summary
A light emitting diode (LED) device is provided. The LED device a first LED string configured to emit light having a first color temperature; a second LED string connected to the first LED string in parallel, and configured to emit light having a second color temperature different from the first color temperature; a controller configured to generate a control signal based on a control command received from an external controller; a switching circuit configured to control brightness of any one or any combination of the first LED string and the second LED string based on the control signal; and a power supply configured to generate an internal power voltage for operation of the controller and the switching circuit.