Nested Transmission Pads for Display Panel Signal Integrity

Solution Overview

Problem

Existing electroluminescent display panels with touch functions face challenges in transmitting touch signals from a touch substrate to a shared driver chip on an array substrate, as the electrical connection between transmission pads on the two substrates is often disrupted due to height differences and lack of contact.

Innovation Solution

The display panel design includes first and second transmission pads with specific film layer structures and conductive components, arranged to ensure electrical connection without adding new film layers or thickening existing ones, allowing for effective signal transmission through fully-opened openings between pads filled with conductive components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If transmission pads are arranged on substrates to transmit touch signals, then signal transmission function is improved, but electrical connection reliability deteriorates due to height differences and lack of contact

Engineering Contradiction:

Improvesignal transmission functionVSAvoidelectrical connection reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements a multi-layer nested pad structure where first transmission pads and second transmission pads are stacked vertically with overlapping projections. The first pad is disposed on the first substrate and the second pad on the second substrate, with their projections overlapping to ensure vertical alignment and electrical connection through the stacked configuration.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent transitions from planar pad arrangement to three-dimensional stacked pad structure. By utilizing the vertical dimension with multiple film layers and overlapping projections, the design ensures electrical connection while accommodating height differences between substrates, effectively solving the reliability issue through dimensional change.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Ease of manufacture

If conventional transmission pad structures are used, then manufacturing process is simpler, but electrical connection fails due to height differences and lack of contact between pads

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidelectrical connection reliability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent implements a multi-layer nested pad structure where first transmission pads and second transmission pads are stacked vertically with overlapping projections. The first pad is disposed on the first substrate and the second pad on the second substrate, with their projections overlapping to ensure vertical alignment and electrical connection through the stacked configuration.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent modifies the geometric parameters of transmission pads by creating multiple film layers with different areas. The first film layer has a smaller area than the second film layer, creating a stepped configuration that facilitates conductive component filling while maintaining electrical connection, thus solving the reliability issue through parameter optimization.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If film layers are added or thickened to ensure pad contact, then electrical connection reliability is improved, but manufacturing complexity and cost increase

Engineering Contradiction:

Improveelectrical connection reliabilityVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent modifies the geometric parameters of transmission pads by creating multiple film layers with different areas. The first film layer has a smaller area than the second film layer, creating a stepped configuration that facilitates conductive component filling while maintaining electrical connection, thus solving the reliability issue through parameter optimization.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces conductive components as an intermediary substance to fill the spaces between the first and second transmission pads. These conductive components bridge the gap between pads, ensuring electrical connection without requiring direct pad-to-pad contact or additional thickening of pad structures.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Area of stationary object

If transmission pads are placed in non-display area, then screen-to-body ratio is improved, but signal transmission path becomes more complex

Engineering Contradiction:

Improvescreen-to-body ratioVSAvoidsignal transmission path complexity

Core Design Contradiction:

Area of stationary objectVSDevice complexity

Solution Approach 1:

The patent transitions from planar pad arrangement to three-dimensional stacked pad structure. By utilizing the vertical dimension with multiple film layers and overlapping projections, the design ensures electrical connection while accommodating height differences, effectively solving the reliability issue through dimensional change.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent implements a multi-layer nested pad structure where first transmission pads and second transmission pads are stacked vertically with overlapping projections. The first pad is disposed on the first substrate and the second pad on the second substrate, with their projections overlapping to ensure vertical alignment and electrical connection.

Inventive Principle:

Principle #7Nested doll (Nesting)

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 design ensures reliable electrical connection and signal transmission between the substrates, reducing manufacturing complexity and cost while maintaining a high screen-to-body ratio and narrow bezel, and preventing short circuits.

Implementation Method 1

filling spaces between the first transmission pads and the second transmission pads with conductive components to electrically connect the first transmission pads to the second transmission pads through the conductive components

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS11127811B2Display panel with layered transmission pads in non-display area, manufacturing method thereof and display device

Publication Date: 2021.09.21 WUHAN TIANMA MICRO ELECTRONICS CO LTD

AI summary

The present disclosure discloses a display panel, a manufacturing method thereof and a display device. By arranging positions of first transmission pads and second transmission pads, and setting areas of first film layers in the first transmission pads to be less than those of second film layers, when the first transmission pads and the second transmission pads are disposed oppositely, fully-opened openings are formed between the two pads, so that it is convenient to fill spaces between the first transmission pads and the second transmission pads with conductive components to allow the first transmission pads be electrically connected with the second transmission pads through the conductive components, guaranteeing an effective electrical connection between the first transmission pads and the second transmission pads and then ensuring signal transmission via first wires and second wires through the first transmission pads and the second transmission pads.