Non-Polar LED Control Chip With Bridge Rectifier Polarity Adaptation

Solution Overview

Problem

Existing light-emitting diode (LED) control circuits require specific polarity and cannot adapt to changes in input terminal polarity, leading to increased manufacturing costs and hinder miniaturization due to the need for multiple LEDs with different polarities in parallel circuits.

Innovation Solution

A non-polar LED control chip with a package containing a bridge rectifier and control module that switches conduction paths based on input terminal polarities, allowing a single LED to be driven regardless of polarity changes, and includes a buck circuit for voltage regulation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple light-emitting diodes with different polarities are connected in parallel to adapt to polarity changes, then the circuit can respond to polarity changes, but manufacturing costs increase and miniaturization is hindered

Engineering Contradiction:

Improvepolarity adaptation capabilityVSAvoidcircuit integration

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The control circuit is designed with dual control modules (first and second control modules) that can selectively operate based on input polarity. Each control module contains current steering elements that route current appropriately regardless of polarity orientation, enabling a single integrated circuit to universally handle both polarities without requiring multiple separate LED components

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent integrates multiple functional components including bridge rectifier, control modules, current steering elements, and buck circuit into a single packaged control chip. This merging of previously separate components (multiple LEDs with different polarities) into one integrated unit reduces overall device complexity while maintaining polarity adaptation capability

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

If multiple light-emitting diodes with different polarities are connected in parallel to adapt to polarity changes, then the circuit can respond to polarity changes, but manufacturing costs cannot be reduced

Engineering Contradiction:

Improvepolarity adaptation capabilityVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent integrates multiple functional components including bridge rectifier, control modules, current steering elements, and buck circuit into a single packaged control chip. This merging of previously separate components (multiple LEDs with different polarities) into one integrated unit reduces overall device complexity while maintaining polarity adaptation capability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The control circuit is designed with dual control modules (first and second control modules) that can selectively operate based on input polarity. Each control module contains current steering elements that route current appropriately regardless of polarity orientation, enabling a single integrated circuit to universally handle both polarities without requiring multiple separate LED components

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 efficient driving of LEDs with varying polarities within a single integrated circuit, reducing manufacturing costs and enabling miniaturization while maintaining consistent light emission.

Implementation Method 1

The control circuit includes a bridge rectifier and a control module. The bridge rectifier is coupled to the first input terminal and the second input terminal

Methodology Applied

Scientific EffectRectification: Diode

Implementation Method 2

The light-emitting diode is configured to receive the drive signal to emit light

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS12568563B2Non-polar light-emitting diode control chip

Publication Date: 2026.03.03 GUANGDONG YONGYU OPTOELECTRONICS CO LTD

AI summary

A non-polar light-emitting diode control chip includes a package. The package has a first input terminal, a second input terminal, and a control circuit. The control circuit includes a bridge rectifier and a control module. The bridge rectifier is coupled to the first input terminal and the second input terminal and has a first output terminal and a second output terminal. The control module is coupled to the first output terminal and the second output terminal and is configured to output a drive signal.