LED Driving Apparatus with Segmented Current Control
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Solution Overview
Problem
Existing LED driving apparatuses require complex configurations to control luminescent properties such as color temperature and luminous flux, making them cumbersome for practical applications.
Innovation Solution
A simplified LED driving apparatus with a power supply circuit, current controlling circuit, and LED controller that concurrently manages the on/off switching and current regulation of LED groups with different color temperatures, using resistors, transistors, and diodes to sense and regulate currents based on control signals for color temperature and luminous flux control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a complex configuration is used to control luminescent properties of LEDs, then color temperature and luminous flux control precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the LED control system into separate LED groups, each with dedicated current controlling circuits. This segmentation allows independent control of color temperature and luminous flux for each group, achieving precise control without requiring a monolithic complex control module. The control module is simplified by managing multiple independent units rather than one complex integrated unit.
Solution Approach 2:
The current controlling circuit is designed to perform multiple functions: it controls current magnitude, regulates color temperature, and manages luminous flux output. By making the current controlling circuit multi-functional, the patent reduces the need for separate dedicated circuits for each function, thereby simplifying the overall device complexity while maintaining control precision.
2Adaptability or versatility
If multiple LED groups with different color temperatures are controlled simultaneously, then adaptability is improved, but stress on the LED controller increases
Solution Approach 1:
The patent segments the LED control into separate current controlling circuits for each LED group, distributing the control burden. Instead of one controller managing all LED groups directly, each group has its own dedicated current controlling circuit that handles local regulation, reducing the overall stress on the main LED controller while maintaining the ability to adjust color temperatures across multiple groups.
Solution Approach 2:
The current controlling circuit acts as an intermediary between the LED controller and the LED groups. It receives control signals from the LED controller and translates them into appropriate current regulation for each LED group, thereby reducing direct stress on the controller while enabling simultaneous control of multiple groups with different color temperatures.
3Productivity
If high current is supplied to LED groups to increase luminous flux, then productivity is improved, but overheating risk increases
Solution Approach 1:
The patent incorporates current sensing circuits that continuously monitor the current flowing through each LED group and provide feedback to the current controlling circuits. This feedback mechanism enables real-time adjustment of current magnitude to maintain optimal operating conditions, allowing high luminous flux output while preventing overheating through dynamic current regulation based on actual temperature conditions.
Solution Approach 2:
The current controlling circuits dynamically adjust the current supplied to each LED group based on real-time conditions rather than maintaining a fixed high current. This dynamic control allows the system to optimize luminous flux output when temperature is acceptable while automatically reducing current to prevent overheating, thereby managing the trade-off between productivity and temperature control.
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
The solution allows for efficient control of LED groups with different color temperatures and luminous flux without affecting each other's properties, reducing stress on the LED controller and preventing overheating, thus simplifying the control module and enhancing operational efficiency.
Implementation Method 1
a current sensing circuit configured to sense the first current and the second current
Implementation Method 2
a first transistor electrically connected to the first resistor and the first LED group and a second transistor electrically connected to the second resistor and the first LED group, the first transistor and the second transistor being configured to regulate the first current and the second current
Data Source
AI summary
A light emitting diode (LED) driving apparatus includes: a power supply circuit supplying driving power to a first LED group and a second LED group, the first LED group and the second LED group being configured to emit light having different color temperatures; a current controlling circuit controlling a first magnitude of a first current flowing through the first LED group and a second magnitude of a second current flowing through the second LED group; and an LED controller concurrently controlling on/off switching operations of a first LED of the first LED group and a second LED of the second LED group.