Transformer Core Segmentation for LCD Flux Collision

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Solution Overview

Problem

Transformers used in liquid crystal display (LCD) systems face issues with electrical noise and current imbalance due to collisions between magnetic fluxes, leading to defects and non-uniform brightness in light sources.

Innovation Solution

A transformer design featuring a bobbin with distinct core insertion grooves and coils around winding sections, which prevents magnetic flux collisions by maintaining separate and non-overlapping magnetic paths, ensuring balanced current distribution and reduced electrical noise.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a transformer uses multiple windings to provide multiple outputs, then the versatility and current balancing capability are improved, but magnetic flux collisions occur causing electrical noise and defects

Engineering Contradiction:

Improvecurrent balancing capabilityVSAvoidelectrical noise

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The transformer core is divided into multiple independent magnetic path sections, each containing its own winding. The core includes a first magnetic path with a first winding and a second magnetic path with a second winding, where the magnetic paths are spatially separated to prevent flux collision. This segmentation allows independent current control for each output while eliminating the harmful magnetic flux interference.

Inventive Principle:

Principle #1Segmentation

2Volume of moving object

If windings are placed close together to reduce transformer size, then the compactness is improved, but magnetic flux collisions increase causing brightness non-uniformity

Engineering Contradiction:

Improvetransformer sizeVSAvoidbrightness uniformity

Core Design Contradiction:

Volume of moving objectVSIllumination intensity

Solution Approach 1:

Each magnetic path is designed with localized magnetic shielding and independent flux containment structures. The core includes magnetic shielding plates positioned between adjacent magnetic paths to locally redirect and contain magnetic flux within each path. This ensures that even when windings are placed close together for compactness, each local region maintains its own magnetic field integrity, preventing flux leakage and collision that would cause brightness non-uniformity.

Inventive Principle:

Principle #3Local quality

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 design enhances the balance of currents applied to light sources, minimizing electrical noise and improving the uniformity of brightness and picture quality in LCD systems by preventing magnetic flux interference.

Implementation Method 1

minimize factors causing defects such as electrical noise by reducing collisions between magnetic fluxes

Methodology Applied

Scientific EffectMagnetic flux: Magnetic Field

Implementation Method 2

A transformer generally has a primary section and a secondary section formed by windings

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS8766755B2Transformer and liquid crystal display apparatus having the same

Publication Date: 2014.07.01 SAMSUNG DISPLAY CO LTD

AI summary

A transformer and a liquid crystal display apparatus having the transformer are provided. The transformer includes a bobbin having at least one first winding section, at least one second winding section, and at least one core insertion groove formed therein. The transformer also includes at least one coil wound around the first winding section and the second winding section with at least one core inserted into the core insertion groove.