Circuit Board Discharge Wiring for Static Electricity Protection

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Solution Overview

Problem

Conventional circuit boards with antistatic elements such as capacitors and Zener diodes increase size, cost, and failure rates due to their presence.

Innovation Solution

A circuit board design that incorporates discharge wiring pairs and low-pass filters, which facilitate the discharge of static electricity through a frequency-based current induction mechanism, reducing the need for antistatic components and minimizing their impact on electronic components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If antistatic elements (capacitor or Zener diode) are added to protect the display from static electricity, then the display is protected from damage, but the board size, cost, and failure rate increase

Engineering Contradiction:

Improvestatic electricity damageVSAvoidnumber of antistatic elements

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent extracts the harmful static electricity from the signal path by providing a separate discharge path. The discharge wiring pair is specifically designed to divert static electricity away from the signal transmission path, allowing the signal to remain clean while static electricity is safely discharged through the dedicated discharge path to ground.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The discharge wiring pair acts as an intermediary element between the interface and ground. It provides a controlled path for static electricity to discharge through, mediating between the harmful static charge and the ground, thereby protecting the signal path without requiring traditional antistatic components.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If antistatic elements are added to protect electronic components, then reliability improves, but manufacturing cost increases

Engineering Contradiction:

Improveprotection from static electricityVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent replaces traditional electronic component-based antistatic protection (capacitors, Zener diodes) with a wiring-based solution. The discharge wiring pair uses simple conductive traces on the circuit board instead of discrete electronic components, significantly reducing manufacturing complexity and cost while maintaining protection functionality.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Object-affected harmful factors

If discharge wiring pair with interval is used to induce discharge, then static electricity is discharged effectively, but board area increases

Engineering Contradiction:

Improvestatic electricity dischargeVSAvoidboard area

Core Design Contradiction:

Object-affected harmful factorsVSArea of stationary object

Solution Approach 1:

The patent utilizes the third dimension (vertical spacing) by creating a gap between the two wires of the discharge wiring pair. This interval allows capacitive coupling to occur, enabling discharge functionality without requiring large horizontal space on the board. The solution transitions from a planar to a spatial arrangement.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 effectively suppresses static electricity discharge to the outside, reducing the number of antistatic elements, minimizing board size, cost, and failure rates while protecting electronic components.

Implementation Method 1

a discharge induction unit configured to induce discharge between the discharge wiring pair by making a current having a frequency based on a voltage waveform of static electricity to be discharged flow more easily in the discharge wiring pair than in the signal path

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS12568574B2Circuit board

Publication Date: 2026.03.03 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

A circuit board includes a board, an interface formed on the board, a discharge wiring pair formed on the board and having a first discharge wire connected to the interface and a second discharge wire having a second tip portion facing a first tip portion of the first discharge wire with an interval, an electronic component installed in a signal path connected to the interface, a ground path connected to the second discharge wire, and a discharge induction unit configured to induce discharge between the discharge wiring pair by making a current having a frequency based on a voltage waveform of static electricity to be discharged flow more easily in the discharge wiring pair than in the signal path.