Display Panel Sub-Recess Structure for Touch Wiring Protection

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Touch failure occurs in conventional display panels due to over etching of touch wirings caused by the overlap of touch wirings and barrier notches during the inkjet printing process.

Innovation Solution

A display panel design that includes a first refractive index layer with barrier notches featuring staggered barrier bodies and sub-recesses to minimize overlap with touch wirings, along with a second refractive index layer that enhances light convergence, and a driver circuit layer with a wiring exchange region to prevent interference during etching.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If a micro lens pattern (MLP) is disposed in an OLED screen body to converge diffused light, then light emission rate is improved, but touch wiring failures occur due to over etching of barrier notches

Engineering Contradiction:

Improvelight emission rateVSAvoidtouch wiring integrity

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The barrier notch structure is segmented into multiple types (first type recess, second type recess with sub-recesses) that are spatially separated. This segmentation allows the barrier notches to effectively block ink flow while creating distinct zones that prevent overlap with touch wirings, thereby maintaining both light emission efficiency and touch wiring integrity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the barrier notch structure are assigned different functions: the first type recess is positioned to cover touch wirings for protection, while the second type recess with sub-recesses is positioned away from touch wirings to block ink flow. This local differentiation of function allows the structure to simultaneously achieve both protection and ink blocking without causing over etching.

Inventive Principle:

Principle #3Local quality

2Ease of manufacture

If barrier notches are etched to block ink flow during inkjet printing, then ink coverage is restricted, but touch wirings are exposed due to over etching

Engineering Contradiction:

Improveink flow controlVSAvoidtouch wiring coverage

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The barrier notch structure is divided into multiple segments (first type recess and second type recess with sub-recesses) that are spatially separated. This segmentation enables the structure to block ink flow effectively while creating protected zones where touch wirings are not exposed to over etching, thus achieving both ink flow control and manufacturing precision.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The barrier notch structure acts as an intermediary element between the inkjet printing process and the touch wirings. By positioning the sub-recesses away from touch wirings and using the first type recess to cover them, the structure mediates the conflict between ink flow blocking and touch wiring protection, preventing direct harmful interaction.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Device complexity

If touch wirings and MLP film layer are disposed adjacent to each other with overlap, then manufacturing is simplified, but over etching occurs when slit is etched

Engineering Contradiction:

Improvestructure arrangementVSAvoidtouch wiring integrity

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The barrier notch structure is segmented into first type recess and second type recess with sub-recesses, creating spatial separation between regions that need to block ink and regions that need to protect touch wirings. This segmentation allows adjacent disposal of touch wirings and MLP film layer while preventing over etching through the differentiated structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the barrier notch structure have different local qualities: the first type recess provides coverage protection for touch wirings, while the second type recess with sub-recesses provides ink flow blocking. This local quality differentiation enables the structure to handle both functions simultaneously without compromising touch wiring integrity despite the adjacent arrangement.

Inventive Principle:

Principle #3Local quality

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

Reduces touch wiring failures by minimizing overlap and etching issues while improving light emission efficiency and enabling a narrow frame design.

Implementation Method 1

a second refractive index layer disposed on a side of the first refractive index layer away from the substrate, filled in the first apertures, and a refractive index of the second refractive index layer is greater than a refractive index of the first refractive index layer

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS20250284363A1Display panel and mobile terminal with at least one sub-recess

Publication Date: 2025.09.11 WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD

AI summary

The present application discloses a display panel and a mobile terminal. The display panel includes a substrate, a light emitting layer, a touch layer, a first refractive index layer, and a second refractive index layer. A refractive index of the second refractive index layer is greater than a refractive index of the first refractive index layer. The touch layer comprises touch wirings extending from a display region to a non-display region. A first type recess in the first refractive index layer covers the touch wirings. The second type recess includes at least one sub-recess not overlapping the touch wirings.