Array Substrate Bridge Electrode Notches for Crosstalk Control

Solution Overview

Problem

In display panels with an Advanced Super Dimension Switch (ADS) structure, notches on pixel electrodes can affect the display effect by causing voltage crosstalk and horizontal stripes due to uneven lateral field capacitance between data lines and bridge pixel electrodes.

Innovation Solution

The array substrate design includes bridge pixel electrodes with notches on both sides, allowing connecting electrodes to be positioned within these notches, which reduces voltage crosstalk and improves display quality by matching the lateral field capacitance of bridge pixel electrodes with adjacent data lines.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a notch is provided on pixel electrodes in ADS structure display panels, then connecting electrodes can be positioned to electrically connect common sub-electrodes, but voltage crosstalk and horizontal stripes occur due to uneven lateral field capacitance

Engineering Contradiction:

Improveelectrical connection of common sub-electrodesVSAvoidvoltage crosstalk and horizontal stripes

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by providing notches only on bridge pixel electrodes (those spanning between data lines) while leaving other pixel electrodes intact. The notches are specifically positioned at locations where connecting electrodes need to pass through, creating localized modifications only where electrical connection is required. This selective approach allows the connecting electrodes to electrically connect common sub-electrodes in adjacent rows without affecting the overall display quality, as the notches are confined to specific locations rather than applied uniformly across all pixel electrodes.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent employs asymmetry by configuring bridge pixel electrodes with notches on their sides adjacent to data lines, creating an asymmetric structure relative to pixel electrodes without notches. The connecting electrodes are positioned asymmetrically within these notches to establish electrical connections between common sub-electrodes in different rows. This asymmetric design enables the connecting electrodes to bridge the gap between rows while maintaining proper electrical connection, resolving the crosstalk issue by creating a controlled asymmetric pathway for electrical connection.

Inventive Principle:

Principle #4Asymmetry

2Adaptability or versatility

If bridge pixel electrodes are used to span between data lines, then common sub-electrodes in adjacent rows can be connected, but display effect deteriorates due to uneven lateral field capacitance

Engineering Contradiction:

Improveconnection between common sub-electrodes in adjacent rowsVSAvoiddisplay effect uniformity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies local quality by providing notches only on bridge pixel electrodes (those spanning between data lines) while leaving other pixel electrodes intact. The notches are specifically positioned at locations where connecting electrodes need to pass through, creating localized modifications only where electrical connection is required. This selective approach allows the connecting electrodes to electrically connect common sub-electrodes in adjacent rows without affecting the overall display quality, as the notches are confined to specific locations rather than applied uniformly across all pixel electrodes.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent uses the notches as intermediary structures that facilitate the connection between common sub-electrodes in adjacent rows. The connecting electrodes are positioned within these notches, which act as intermediary pathways allowing electrical connection without directly compromising the pixel electrode structure. This intermediary approach enables the bridge pixel electrodes to fulfill their dual function of spanning between data lines and enabling row-to-row connection while maintaining display uniformity.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12032249B2Array substrate and display device

Publication Date: 2024.07.09 BEIJING BOE DISPLAY TECH CO LTD

AI summary

This disclosure relates to the displaying technical field, and provides an array substrate and a display device. The array substrate includes a base substrate, data lines and pixel electrodes. The data lines include adjacent first and second data lines. The pixel electrodes include at least one bridge pixel electrode, an orthographic projection of which on the base substrate is between orthographic projections of the first data line and the second data line on the base substrate. A first notch is provided on a side of the bridge pixel electrode close to the first data line, and a second notch is provided on a side of the bridge pixel electrode close to the second data line. The bridge pixel electrode of the array substrate has a similar lateral field capacitance to the data lines on both sides, thus reducing voltage crosstalk of the bridge pixel electrode and improving the display effect.