Display Substrate Electrostatic Ring Gate Driver Reliability

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional display technologies face reliability issues due to charge accumulation in gate drivers when the display panel is shut down, leading to residual image problems and reduced reliability of the gate driver.

Innovation Solution

A display substrate with electrostatic rings and control components connected to gate lines, where the electrostatic rings load a control voltage after shutdown to turn on the control components, changing the gate line voltage to a turn-on voltage, thereby avoiding charge accumulation and improving reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the gate line is loaded with a high level through the signal line of the GOA when the Xao function is turned on, then the shutdown residual image problem is solved, but charges inside the GOA are accumulated causing the TFT to be in a stressed state which reduces the reliability of the GOA

Engineering Contradiction:

Improvereliability of the GOAVSAvoidcharge accumulation in the GOA

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

An electrostatic ring is introduced as an intermediary component between the gate driver output and the gate line. The electrostatic ring acts as a charge storage element that can absorb excess charges during the Xao function operation, preventing charge accumulation in the GOA circuit while still allowing the gate line to be properly loaded with high level voltage for residual image elimination.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The voltage state of the gate line is dynamically changed between normal operation mode and Xao function mode. During Xao operation, the gate line voltage is switched to a high level state to turn on all TFTs and discharge pixel electrodes, eliminating residual images. The electrostatic ring enables this parameter change without causing harmful charge accumulation in the driver circuit.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If the gate line is directly connected to the gate driver output, then the circuit structure is simple, but charge accumulation occurs inside the GOA when the Xao function is activated

Engineering Contradiction:

Improvecircuit structureVSAvoidreliability of the GOA

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The electrostatic ring serves as a mediator component inserted between the gate driver output and the gate line. This additional component prevents charge accumulation by providing an alternative charge storage path, thereby improving reliability while maintaining relatively simple circuit architecture.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The connection between the gate driver and gate line is segmented into two parts: the signal transmission path through the electrostatic resistor and the charge storage function provided by the electrostatic ring. This segmentation allows the circuit to separately handle signal transmission and charge management functions, preventing charge accumulation while maintaining structural simplicity.

Inventive Principle:

Principle #1Segmentation

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 solution effectively sets all gate lines to a high level after shutdown, ensuring thin film transistors are turned on to discharge static electricity, enhancing the reliability of the gate drivers and preventing damage from static electricity.

Implementation Method 1

each of the electrostatic rings is configured to load a control voltage after the display panel is turned off, so as to turn on a corresponding one of the control components

Methodology Applied

Scientific EffectElectrostatic voltage loading: Electrostatic Induction

Implementation Method 2

each of the control components is configured to be turned on after the display panel is turned off, so as to change a voltage on a corresponding gate line into a turn-on voltage

Methodology Applied

Scientific EffectVoltage transformation through controlled switching: Electrical Resistance

Implementation Method 3

voltages of all the gate lines are set to a high level, at this time, thin film transistors (abbreviated as TFT) for all sub-pixels in a display panel thereof are turned on and discharge towards their respective pixel electrodes

Methodology Applied

Scientific EffectElectrical discharge: Electrostatic Discharge

Data Source

PatentUS11514835B2Display substrate having electrostatic ring and control component

Publication Date: 2022.11.29 HEFEI XINSHENG OPTOELECTRONICS TECH CO LTD

AI summary

The present disclosure relates to a display substrate, a method for driving the same, and a display panel. The display substrate includes a base substrate as well as gate lines, data lines and a gate driver on the base substrate, the gate line being connected to the gate driver, and electrostatic rings and control components corresponding to at least one gate line are further disposed on the base substrate, each of the gate lines being connected to the electrostatic ring by a corresponding control component. The electrostatic ring is configured to load a control voltage to turn on the corresponding control component after the display panel is turned off, and the corresponding control component is configured to be turned on to change a voltage on the gate line into a turn-on voltage after the display panel is turned off.