Touch Wire Height Compensation in Display Panels

Solution Overview

Problem

The manufacturing process of touch wires in display panels, particularly when climbing over functional layers with varying heights, leads to issues such as short circuits and disconnections due to inconsistent line widths and heights, affecting yield and performance.

Innovation Solution

The touch wire design includes sub-portions with varying heights and line widths, where the line widths are inversely proportional to the heights, with compensation at higher elevations to maintain consistent widths, preventing short circuits and disconnections.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the touch wire climbs over functional layers with varying heights, then the touch wire can connect across different levels, but the line width becomes inconsistent leading to short circuits and disconnections

Engineering Contradiction:

Improvetouch wire connectivityVSAvoidline width consistency

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The touch wire is designed with different line widths at different heights. At higher positions where the wire climbs over functional layers, the line width is reduced to prevent short circuits between adjacent wires. At lower positions, the line width is larger to ensure adequate connection. This local differentiation of geometric parameters resolves the contradiction between maintaining connectivity and preventing short circuits.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the geometric parameters (line width and height) of the touch wire along its path. Specifically, the line width is made inversely proportional to the height at certain sections, so that as the wire climbs higher over functional layers, its line width decreases accordingly. This parameter variation allows the wire to adapt to different vertical positions and avoid short circuits while maintaining electrical connectivity.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the touch wire is made wider at higher positions, then connection reliability improves, but the risk of short circuits between adjacent wires increases

Engineering Contradiction:

Improveconnection reliabilityVSAvoidshort circuit risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The touch wire is designed with different line widths at different heights. At higher positions where the wire climbs over functional layers, the line width is reduced to prevent short circuits between adjacent wires. At lower positions, the line width is larger to ensure adequate connection. This local differentiation of geometric parameters resolves the contradiction between maintaining connectivity and preventing short circuits.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The touch wire design incorporates narrower sections at higher positions before actual short circuits can occur. By proactively reducing the line width at elevated positions where short circuit risk is highest, the design prevents harmful effects before they can manifest, ensuring reliable operation.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Object-affected harmful factors

If the touch wire line width is reduced at higher positions, then short circuit prevention improves, but connection strength may be compromised

Engineering Contradiction:

Improveshort circuit preventionVSAvoidconnection strength

Core Design Contradiction:

Object-affected harmful factorsVSStrength

Solution Approach 1:

The touch wire is designed with different line widths at different heights. At higher positions where the wire climbs over functional layers, the line width is reduced to prevent short circuits between adjacent wires. At lower positions, the line width is larger to ensure adequate connection. This local differentiation of geometric parameters resolves the contradiction between maintaining connectivity and preventing short circuits.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The touch wire is divided into multiple sections with different geometric characteristics. The wire has narrower sections at higher positions for short circuit prevention and wider sections at lower positions for strong connections. This segmentation of the wire into functionally distinct portions allows each section to be optimized for its specific purpose without compromising overall performance.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12561022B2Display panel and display apparatus having various heights of dam structures and various width of touch wires

Publication Date: 2026.02.24 BEIJING BOE TECH DEV CO LTD

AI summary

A display panel and a display device are provided, the display panel includes a base substrate and a touch wire including a first sub-portion and a second sub-portion, a main surface of the base substrate is a first surface; the second sub-portion includes a first height portion and a second height portion, a height of the first height portion relative to the first surface is smaller than a height of the second height portion relative to the first surface, line widths of respective positions of the first height portion are inversely proportional to heights of the respective positions of the first height portion relative to the first surface, and line widths of respective positions of at least part of the second height portion are proportional to heights of the respective positions of the at least part of the second height portion relative to the first surface.