Linear Luminance Adjusting Circuit for LED Illumination
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Solution Overview
Problem
Conventional LED illuminating circuits have complex external circuitry and high fabrication costs due to their two-stage structure, which complicates luminance and color adjustment.
Innovation Solution
A linear luminance adjusting circuit with a single-stage structure, comprising a rectifying circuit, constant voltage circuit, control module, linear constant current circuit, and hybrid luminance circuit, which integrates rectifying and linear constant current circuits to reduce space and cost, using components like full-bridge converters, resistors, capacitors, and wireless communication modules to generate and control linear current for illuminating units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a two-stage structure (constant-voltage stage + constant-current stage) is used for LED illuminating circuit, then luminance and color adjustment can be achieved, but the circuit complexity and fabrication cost increase significantly
Solution Approach 1:
The patent combines the constant-voltage stage and constant-current stage into a single integrated circuit module. The rectifying circuit, constant voltage circuit, control module, and linear constant current circuit are merged into one unified structure, eliminating the need for separate two-stage circuits while maintaining full luminance and color adjustment functionality.
2Ease of operation
If a two-stage structure is used for LED illuminating circuit, then luminance and color adjustment can be achieved, but the fabrication cost increases
Solution Approach 1:
By integrating multiple functional stages into a single circuit module, the patent reduces the number of discrete components, soldering operations, and assembly steps required during manufacturing. This integration directly lowers fabrication costs while preserving all adjustment capabilities.
Solution Approach 2:
The integrated circuit module performs multiple functions simultaneously: rectification, constant voltage regulation, constant current control, and luminance/color adjustment. This multi-functionality eliminates the need for separate dedicated circuits for each function, reducing overall manufacturing complexity and cost.
3Power
If a two-stage structure is used for LED illuminating circuit, then power conversion can be achieved, but the circuit occupies large space
Solution Approach 1:
The patent merges the rectifying circuit, constant voltage circuit, and linear constant current circuit into a single integrated module, significantly reducing the space required on the circuit board compared to implementing these as separate two-stage circuits with their own dedicated components and trace routing.
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 single-stage structure significantly reduces the circuitry complexity and fabrication costs, enabling efficient luminance and color adjustment while maintaining stable output power and reducing control malfunctions, resulting in a more compact and cost-effective LED illuminating solution.
Implementation Method 1
the rectifying circuit rectifies power from the AC power source to generated a rectified voltage
Implementation Method 2
the constant voltage circuit transforms the rectified voltage into a constant voltage
Implementation Method 3
the linear constant current circuit generates a linear current using the control signal
Implementation Method 4
the hybrid luminance circuit illuminates using the linear current
Data Source
AI summary
A linear luminance adjusting circuit includes a rectifying circuit, a constant voltage circuit, a control module, a linear constant current circuit and a hybrid luminance circuit. The rectifying circuit rectifies power from the AC power source to generated a rectified voltage. The constant voltage circuit transforms the rectified voltage into a constant voltage. The control module is electrically coupled to the constant voltage circuit. The control module generates a control signal using the constant voltage. The linear constant current circuit is electrically coupled to the rectifying circuit and the control module. The linear constant current circuit is powered up using the rectifying voltage. And the linear constant current circuit generates a linear current using the control signal. The hybrid luminance circuit is electrically coupled to the rectifying circuit and the linear constant current circuit. The hybrid luminance circuit illuminates using the linear current.