Solid-State Light Emitting Device Phase Angle Control

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Solution Overview

Problem

Conventional single-phase AC power lamps experience brightness pulsation due to voltage pulses, and multiphase AC power sources exacerbate this issue by causing different phase voltages to generate varying brightness levels, leading to reduced synthetic illumination and reactive power consumption.

Innovation Solution

A three-phase or multiphase AC power system drives solid-state light emitting members arranged adjacently or with overlapping configurations, utilizing a solid-state switch device to control AC conductivity phase angle, thereby reducing brightness pulsation and regulating current and voltage to conserve power.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a multiphase AC power source drives individual solid-state light emitting members, then synthetic illumination is achieved with reduced brightness pulse, but reactive power is generated causing energy loss

Engineering Contradiction:

Improvesynthetic illumination brightnessVSAvoidreactive power consumption

Core Design Contradiction:

Illumination intensityVSLoss of energy

Solution Approach 1:

The patent changes the phase angle parameter of the solid-state switch device to control the conduction angle of each phase, thereby adjusting the reactive power generation. By optimizing the phase angle control, the system reduces reactive power loss while maintaining synthetic illumination brightness.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements a control system that detects the actual brightness and reactive power consumption, then feeds back to adjust the phase angle control of the solid-state switch device. This feedback mechanism optimizes the balance between illumination quality and energy efficiency.

Inventive Principle:

Principle #23Feedback

2Device complexity

If conventional single-phase AC power is used, then circuit complexity is low, but brightness pulsation occurs reducing illumination stability

Engineering Contradiction:

Improvecircuit structure simplicityVSAvoidbrightness stability

Core Design Contradiction:

Device complexityVSIllumination intensity

Solution Approach 1:

The patent divides the single-phase power drive into multiple independent phase channels, each driven by a solid-state switch device. This segmentation allows different phases to operate at different conduction angles, smoothing the overall illumination output while maintaining manageable circuit complexity through modular design.

Inventive Principle:

Principle #1Segmentation

3Illumination intensity

If multiphase AC power drives solid-state light emitting members with different brightness levels, then synthetic illumination is achieved, but power consumption increases due to reactive power

Engineering Contradiction:

Improvesynthetic illumination qualityVSAvoidpower consumption

Core Design Contradiction:

Illumination intensityVSUse of energy by moving object

Solution Approach 1:

The patent makes the conduction angle of each phase dynamic and adjustable through phase angle control of the solid-state switch device. This dynamic control allows the system to adaptively optimize power consumption based on the required illumination output, reducing reactive power loss while maintaining synthetic illumination quality.

Inventive Principle:

Principle #15Dynamics

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

This approach enhances synthetic illumination stability and reduces power consumption by managing reactive power, resulting in consistent brightness and energy savings.

Implementation Method 1

solid-state light emitting member

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Implementation Method 2

solid-state switch device for controlling AC conductivity phase angle

Methodology Applied

Scientific EffectPhase angle control:

Data Source

PatentUS8791639B2Solid-state light emitting device having controllable multiphase reactive power

Publication Date: 2014.07.29 YANG TAI HER

AI summary

The present invention utilizes a three-phase or multiphase AC power source, and the electric power of each phase respectively drives its corresponding solid-state light emitting member, and the solid-state light emitting members respectively driven by each phase power are arranged adjacently or arranged with an overlapping means, so that the light of the individual solid-state light emitting members respectively driven by the multiphase power source and arranged adjacently or arranged with an overlapping means can reduce the brightness pulse through synthetic illumination; and through being controlled by a solid-state switch device for controlling AC conductivity phase angle (1000) installed on the power source of each phase, when the illumination brightness of corresponding solid-state light emitting member is lower than that of other solid-state light emitting members arranged adjacently or arranged with an overlapping means, the power source is cut for saving energy.