Multi-output Transformer for LCD Lamp Drive
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Solution Overview
Problem
Conventional transformers require multiple units to drive multiple lamps, increasing cost and complexity, while also facing insulating and noise issues due to high voltage output and return wire interactions.
Innovation Solution
A multi-output transformer design featuring a primary bobbin with one winding unit and a secondary bobbin with multiple winding units, where the primary bobbin is either separated from or inserted into the secondary bobbin, utilizing a pair of cores to maintain insulation and balance voltage induction, and incorporating auxiliary terminals for protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transformers are used to drive multiple lamps, then each lamp can be supplied with power independently, but the cost and device complexity increase
Solution Approach 1:
The patent combines multiple secondary windings into a single transformer core, allowing one transformer to drive multiple lamps simultaneously. The transformer includes a primary winding and multiple secondary windings (first secondary winding and second secondary winding), each connected to separate lamps, thereby reducing the total number of transformers while maintaining independent power supply capability for each lamp.
Solution Approach 2:
The transformer is designed with multi-functionality by incorporating multiple secondary windings that can independently serve different lamps. This universal design allows a single transformer to perform the function of multiple transformers, reducing system complexity while maintaining the ability to independently control power supply to each lamp.
2Power
If high voltage output is used to drive fluorescent lamps, then the lamps can be operated, but insulating problems and noise interference occur
Solution Approach 1:
The patent segments the secondary windings into separate, isolated units (first secondary winding and second secondary winding) with independent connections to different lamps. This segmentation reduces electromagnetic interference between windings and improves insulation performance by minimizing the interaction between high voltage outputs.
Solution Approach 2:
The patent introduces a magnetic core as an intermediary that provides galvanic isolation between the primary and secondary windings. The magnetic core transfers energy through magnetic coupling rather than direct electrical connection, thereby reducing noise interference and improving insulation while maintaining high voltage output capability.
3Reliability
If multiple transformers are used, then adequate insulation can be maintained, but the unit cost and overall cost increase
Solution Approach 1:
The patent merges multiple secondary windings into a single transformer structure, reducing the total number of transformers needed. This consolidation maintains insulation performance through proper winding arrangement and magnetic core isolation while significantly reducing unit cost and overall manufacturing cost by eliminating redundant components.
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 design allows a single transformer to effectively drive multiple lamps, reducing costs by up to ¼, while ensuring adequate insulation and preventing noise and waveform distortion, thus balancing output current and improving efficiency.
Implementation Method 1
a high voltage transformer, wherein the transformer plays a role of supplying voltage to the lamp constituting an LCD panel by generating high AC output voltage with low AC input voltage
Data Source
AI summary
In accordance with the present invention, a multi-output transformer includes a primary bobbin provided with one primary winding unit with one input terminal and one ground terminal; a secondary bobbin provided with n(n: positive integer) number of secondary winding units with two output terminals respectively; a primary coil wound around the one primary winding unit; secondary coils wound around each of the n secondary winding units; and a pair of cores inserted into insertion holes formed inside the primary bobbin and the secondary bobbin respectively to separate the primary bobbin and the secondary bobbin.