Display Pad Discharge Layout for Driver Static Protection

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Solution Overview

Problem

Static electricity during the manufacturing process of flat panel display devices can damage the pixel structure, driver, and components on the substrate.

Innovation Solution

Incorporation of discharge patterns and ground lines in the pad area of the substrate, which are electrically connected to input pads, to induce and discharge static electricity to the outside, thereby protecting the driver from damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If discharge patterns and ground lines are added to protect the driver from static electricity, then reliability is improved, but device complexity increases

Engineering Contradiction:

Improvedriver protection from static electricityVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The discharge patterns are designed and positioned in advance within the pad area before static electricity damage can occur. The ground lines are pre-established to provide a ready-made discharge path, so when static electricity accumulates during manufacturing, the protection mechanism is already in place and immediately effective.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The discharge patterns act as an intermediary element between the driver and the static electricity source. Instead of directly protecting the driver, the discharge patterns serve as a intermediate structure that intercepts static electricity and channels it through ground lines to a safe discharge point, thereby protecting the driver indirectly.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If discharge patterns are placed adjacent to the driver in the pad area, then static electricity discharge capability is improved, but manufacturing precision requirements increase

Engineering Contradiction:

Improvestatic electricity discharge capabilityVSAvoidpattern positioning precision

Core Design Contradiction:

Object-affected harmful factorsVSManufacturing precision

Solution Approach 1:

The discharge patterns are specifically localized to the pad area adjacent to the driver, where static electricity discharge is most critical. This localized approach concentrates the protection function in the specific region where it is needed most, rather than distributing protection structures throughout the entire device, thereby reducing overall manufacturing complexity while maintaining effective protection.

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

Prevents damage to the driver and other components by effectively dissipating static electricity during the manufacturing process.

Implementation Method 1

ground lines electrically connecting at least one of input pads and the discharge patterns

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS12360627B2Display device having discharge patterns in a pad area to discharge static electricity introduced into a driver

Publication Date: 2025.07.15 SAMSUNG DISPLAY CO LTD

AI summary

A display device may include a substrate, input pads, output pads, a driver, discharge patterns, and ground lines. The substrate may include a display area and a pad area. The input pads may be disposed in a first portion of the pad area. The output pads may be disposed in a second portion of the pad area. The driver may be disposed on the input pads and the output pads. The discharge patterns may be disposed adjacent to the driver in the pad area. The ground lines may electrically connect the discharge patterns and at least one of the input pads in the pad area.