Array Substrate Wiring for Coupling Compensation

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Solution Overview

Problem

In display devices, the coupling between signal lines and common electrode lines can cause disturbances in the reference voltage, leading to poor display performance due to the increasing demand for narrow bezels and higher driving voltages, which results in adjacent wiring and increased coupling effects.

Innovation Solution

The array substrate incorporates a wiring structure with signal lines arranged on both sides of the common electrode line, where one line transmits a driving signal and the other transmits an inverted signal, connected to an impedance load, to compensate for coupling effects without altering the original circuit's logic, function, or wiring width.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If signal lines are arranged adjacent to common electrode line to reduce wiring space, then the bezel width is reduced, but coupling effect between signal line and common electrode line increases causing reference voltage disturbance

Engineering Contradiction:

Improvewiring spaceVSAvoidcoupling effect

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a compensation signal line that transmits an inverted version of the original signal. The coupling effect, which was harmful, is converted into a beneficial compensation mechanism where the inverted signal's coupling effect counteracts the disturbance caused by the original signal, thereby stabilizing the reference voltage on the common electrode line.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The compensation signal line acts as an intermediary element between the original signal line and the common electrode line. It transmits a compensating signal that mediates the coupling effect, reducing the net disturbance to the reference voltage by introducing an opposing electrical influence through the inverted signal.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Power

If higher driving voltage is used to drive gate driving circuit, then the driving capability is improved, but the coupling effect between signal line and common electrode line is enhanced causing greater reference voltage disturbance

Engineering Contradiction:

Improvedriving voltageVSAvoidreference voltage disturbance

Core Design Contradiction:

PowerVSObject-affected harmful factors

Solution Approach 1:

The patent utilizes the coupling effect itself, which becomes more pronounced with higher driving voltages, and converts it into a beneficial compensation mechanism. By transmitting an inverted signal through the compensation signal line, the enhanced coupling effect is harnessed to generate a stronger compensating influence that counteracts the reference voltage disturbance caused by the high-voltage original signal.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Area of stationary object

If signal line and common electrode line are placed close together to meet narrow bezel requirements, then the display area is increased, but the coupling effect causes periodic stripe defects in display

Engineering Contradiction:

Improvedisplay areaVSAvoiddisplay quality

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The patent converts the harmful coupling effect, which causes periodic stripe defects, into a beneficial compensation mechanism. The compensation signal line transmits an inverted signal whose coupling effect with the common electrode line counteracts the periodic disturbances, thereby eliminating the stripe defects while maintaining the narrow bezel design and maximizing display area.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 arrangement reduces or avoids coupling effects, improving signal quality and reducing periodic defects like stripe phenomena, thereby enhancing display performance.

Implementation Method 1

Because there may be a coupling between the signal line and the common electrode line, the reference voltage provided by the common electrode line, for example, may be disturbed by the effect of the coupling

Methodology Applied

Scientific EffectCoupling effect: Capacitance

Data Source

PatentUS11011091B2Array substrate for reducing coupling effect, display panel, display device, operating method, and manufacturing method

Publication Date: 2021.05.18 BEIJING BOE DISPLAY TECH CO LTD

AI summary

An array substrate, a display panel, a display device, an operating method, and a manufacturing method are disclosed. The array substrate includes a wiring structure formed on a base substrate, and the wiring structure includes a common electrode line for connecting a common electrode, and a plurality of signal lines. The plurality of signal lines include at least one pair of signal lines, and the pair of signal lines include a first signal line and a second signal line. The first signal line is disposed on a first side of the common electrode line and is configured to transmit a driving signal for a gate driving circuit. The second signal line is disposed on a second side of the common electrode line and is configured to transmit an inverted signal of the driving signal.