Touch Panel Bridge Electrode Layout for Lower Capacitance

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Solution Overview

Problem

Existing touch control structures for AMOLED displays face issues with high capacitance values and increased probability of short circuits due to large overlapping areas between touch driving and sensing electrodes, leading to poor touch performance and increased power consumption.

Innovation Solution

A touch control structure design with intersecting and symmetrical bridge electrodes, where adjacent bridge electrodes extend in different directions, reducing overlapping areas and incorporating via structures for electrical connections, thereby minimizing capacitance and preventing short circuits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If traditional parallel bridge electrode design is used to connect touch sub-electrodes, then the touch control structure can maintain simple manufacturing process, but the overlapping area between touch driving and sensing electrodes increases, leading to high capacitance values and increased power consumption

Engineering Contradiction:

Improvepower consumptionVSAvoidelectrode structure complexity

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The patent applies asymmetry by changing the extension directions of adjacent bridge electrodes from parallel to intersecting at specific angles (45-135 degrees). This asymmetric arrangement reduces the overlapping area between touch driving and sensing electrodes, thereby reducing capacitance values and power consumption while maintaining manufacturing simplicity

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The patent changes the geometric parameter of bridge electrodes by setting their extension directions to intersect at specific angles (45-135 degrees) rather than being parallel. This parameter change optimizes the overlapping area between electrodes, reducing capacitance and power consumption without significantly increasing manufacturing complexity

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If larger overlapping areas between touch driving and sensing electrodes are used to improve touch sensitivity, then the touch detection capability is enhanced, but the capacitance values increase and power consumption rises

Engineering Contradiction:

Improvetouch detection accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent optimizes the geometric parameters of bridge electrodes by setting their extension directions to intersect at specific angles (45-135 degrees). This parameter optimization reduces the overlapping area between touch driving and sensing electrodes, thereby reducing capacitance values and power consumption while maintaining adequate touch detection accuracy through proper electrode spacing and arrangement

Inventive Principle:

Principle #35Parameter changes

3Use of energy by moving object

If bridge electrodes are arranged to reduce overlapping areas, then capacitance values and power consumption are reduced, but the extension directions of adjacent bridge electrodes become more complex

Engineering Contradiction:

Improvepower consumptionVSAvoidelectrode arrangement geometry

Core Design Contradiction:

Use of energy by moving objectVSShape

Solution Approach 1:

The patent uses asymmetric arrangement where adjacent bridge electrodes extend in different directions (intersecting at 45-135 degrees) rather than parallel. This asymmetric geometry reduces overlapping areas and power consumption while maintaining manufacturability through standard photolithography processes that can handle angled patterns

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The patent applies local quality by allowing different regions of the touch panel to have different bridge electrode configurations. The middle area uses intersecting bridge electrodes to reduce capacitance, while peripheral areas can use simpler parallel arrangements, optimizing both power consumption and manufacturing ease in different zones

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20260016923A1Touch control structure, touch display panel and electronic device

Publication Date: 2026.01.15 CHENGDU BOE OPTOELECTRONICS TECH CO LTD

AI summary

A touch control structure, a touch display panel and an electronic device are provided. The touch control structure includes: a first metal layer and a second metal layer stacked on the base substrate, an insulating layer between the first metal layer and the second metal layer, the first metal layer includes a plurality of first touch sub-electrodes arranged along a first direction and spaced apart from each other, a plurality of second touch sub-electrodes and a plurality of connection electrodes which are arranged along a second direction, the plurality of first touch sub-electrodes and the plurality of second touch sub-electrodes are spaced apart from each other; the second metal layer includes a plurality of bridge electrodes spaced apart from each other, each of the plurality of bridge electrodes is electrically connected with two adjacent first touch sub-electrodes through a plurality of via structures in the insulating layer.