Test Circuit for Display Panel ESD Leakage Prevention

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Solution Overview

Problem

Display panels experience electricity leakage and increased power consumption due to the continuous electrical connection of electrostatic discharge (ESD) devices during normal use, even when not under lighting tests.

Innovation Solution

A test circuit with a switch module that electrically disconnects ESD devices from the display panel using control signals when the panel is not under lighting test, employing transistors and switch units to manage signal connections and prevent leakage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the ESD device remains electrically connected to the display panel during normal use, then the display panel is protected from ESD damage, but the display panel experiences electricity leakage and increased power consumption

Engineering Contradiction:

Improveprotection from ESD damageVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent implements a dynamic connection state for the ESD device by introducing a switch module that can change the electrical connection status between the ESD device and display panel based on operational conditions. During lighting tests, the switch module maintains electrical connection for ESD protection, while during normal use, it disconnects the ESD device to eliminate power consumption, thus dynamically adapting the system state to different operational requirements

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies periodic action by using control signals to periodically switch the connection state of the ESD device. The switch module receives control signals that trigger connection during lighting tests and disconnection during normal use, creating a periodic on-off pattern that matches the operational cycle of the display panel testing process

Inventive Principle:

Principle #19Periodic action

2Object-affected harmful factors

If the ESD device is electrically connected to the display panel, then ESD protection is provided, but electricity leakage occurs during normal use

Engineering Contradiction:

ImproveESD protectionVSAvoidelectricity leakage

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The patent introduces a switch module as an intermediary component between the ESD device and the display panel. This intermediary controls the electrical connection state, allowing the ESD device to be connected when protection is needed (lighting tests) and disconnected during normal use to prevent electricity leakage, thus mediating the interaction between the ESD device and display panel based on operational requirements

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11205358B2Test circuit for preventing an electrostatic discharge device from electricity leakage and display panel having same

Publication Date: 2021.12.21 WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD

AI summary

A test circuit for preventing an electrostatic discharge (ESD) device from electricity leakage and a display panel having the same are provided. The test circuit includes a switch module between the ESD device and the display panel to control an electrical connection between the ESD device and the display panel, and prevent the display panel from electricity leakage, so as to reduce power consumption.