Hand-Assembly Load Control Device for LED Dimming
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Solution Overview
Problem
Existing LED dimming circuits are complex and costly, making them difficult for non-professionals to implement and apply, and they lack versatility in operation modes based on conductivity resistance values.
Innovation Solution
A load control device and hand-assembly circuit board featuring a transistor circuit, charge/charge-discharge circuit, and hand-assembly electrodes, allowing for simple circuit design, easy manufacturing, and wide application, with electrodes having a surface area greater than or equal to 15 mm2 for user-operable conductivity, enabling various operation modes based on resistance values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If PWM dimming control is used for LED, then dimming function is achieved, but circuit complexity increases and cost increases
Solution Approach 1:
The patent changes the control parameter from PWM (pulse width modulation) to direct voltage control through a voltage divider circuit. By varying the resistance ratio between two resistors, the LED current and brightness are directly controlled without complex timing circuits, thus achieving dimming with simpler hardware
Solution Approach 2:
The patent extracts the essential dimming function from the complex PWM control system and implements it through a simple voltage division principle. Only basic components (resistors, transistor) are needed to achieve the same functional outcome, removing unnecessary circuit complexity
2Adaptability or versatility
If PWM dimming control is used for LED, then dimming function is achieved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive PWM control ICs and associated components with inexpensive passive components (resistors, transistor) that are widely available and low-cost. The voltage divider approach uses basic components that can be easily sourced and assembled, significantly reducing bill of materials cost
3Measurement precision
If professional technical knowledge is required for LED dimming, then precise control is achieved, but ease of operation for non-professionals decreases
Solution Approach 1:
The patent creates a system where non-professionals can easily implement LED dimming by simply selecting resistor values from standard series or using a potentiometer. The circuit self-adjusts through the voltage division ratio, eliminating the need for users to understand PWM timing or complex control theory
Solution Approach 2:
The patent breaks down the control mechanism into simple, independent resistor selections rather than requiring integration of multiple control functions. Users can achieve precise control by independently choosing resistor values, making the system accessible to hobbyists and non-professionals
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 provides a simple, cost-effective, and versatile load control system that can derive multiple operation modes by controlling conductivity, effectively addressing the complexity and cost issues of traditional LED dimming circuits while enabling user-friendly assembly and operation.
Implementation Method 1
a charge/charge-discharge circuit, which is electrically connected to a control electrode and a second electrode of the transistor
Data Source
AI summary
A load control device for controlling a load unit includes a transistor circuit, a charge/charge-discharge circuit, a first hand-assembly electrode and a second hand-assembly electrode. The transistor circuit includes a transistor, and a first electrode of the transistor is electrically connected to one end of the load unit. The charge/charge-discharge circuit is electrically connected to a control electrode and a second electrode of the transistor. The first hand-assembly electrode is electrically connected to the control electrode of the transistor. The second hand-assembly electrode is electrically connected to the charge/charge-discharge circuit and the second electrode of the transistor. A hand-assembly circuit board including the load control device and a hand-assembly circuit is also provided.