Touch Display Substrate With Inverted Touch Layer

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional touch display substrates face issues such as damage to the display product and reduced yield during production due to the on-cell touch substrate, which also increases the thickness of the display product.

Innovation Solution

A touch display substrate design featuring a base substrate with a touch structure layer and a display structure layer, where the touch structure layer is positioned close to the base substrate, utilizing a metal mesh structure for touch electrodes and a connecting layer to improve flexibility and reduce thickness, along with a transparent polyimide base substrate for enhanced bending performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If an on-cell touch substrate is used to cover the surface of the display product, then touch control functionality is achieved, but the display product becomes thicker and more prone to damage during production

Engineering Contradiction:

Improvetouch control functionalityVSAvoidthickness of display product

Core Design Contradiction:

Adaptability or versatilityVSLength of stationary object

Solution Approach 1:

The patent inverts the conventional on-cell touch substrate structure by positioning the touch structure layer on the base substrate side rather than on the display structure layer side. This inversion allows the touch functionality to be integrated at the bottom of the display stack, thereby reducing the overall thickness of the display product while maintaining touch control capabilities.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent utilizes the base substrate as an additional dimension for integrating the touch structure. Instead of adding thickness in the vertical dimension by placing the touch substrate on top of the display structure, the design embeds the touch structure within the base substrate layer, effectively using the horizontal plane of the base substrate to accommodate touch electrodes and conductive patterns.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If an on-cell touch substrate is used, then touch control is implemented, but damage to the display product and reduced yield occur during production

Engineering Contradiction:

Improvetouch control functionalityVSAvoidyield of display product

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

By inverting the structure to place the touch structure layer on the base substrate side, the patent eliminates the need for a separate on-cell touch substrate that could damage the display product during handling and assembly. The touch structure is integrated into the base substrate, reducing the number of separate components and potential sources of damage.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent merges the touch structure layer with the base substrate by positioning the touch structure layer on the base substrate side and allowing them to be formed together or in close integration. This merging reduces the number of separate substrates that need to be handled during production, thereby reducing damage risk and improving yield.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If a traditional touch substrate structure is used, then touch electrodes are formed, but the device complexity and manufacturing difficulty increase

Engineering Contradiction:

Improvetouch electrode functionalityVSAvoidstructure complexity of touch substrate

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines the touch electrode structure with the base substrate by positioning the touch structure layer on the base substrate side. This integration allows the touch electrodes and conductive patterns to be formed as part of the base substrate manufacturing process, reducing the number of separate fabrication steps and simplifying the overall device structure.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The base substrate serves multiple functions: it provides the structural support for the display product, acts as the foundation for the touch structure layer, and enables the formation of touch electrodes and conductive patterns. This multi-functionality reduces the need for separate components and simplifies the overall device architecture.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11494018B2Touch display substrate, manufacturing method thereof, and touch display apparatus

Publication Date: 2022.11.08 MIANYANG BOE OPTOELECTRONICS TECH CO LTD

AI summary

A touch display substrate and a manufacturing method thereof, and a touch display apparatus are provided, the touch display substrate includes a base substrate, and a touch structure layer and a display structure layer disposed on the base substrate; wherein the touch structure layer is provided to implement touch control, the display structure layer is provided to implement display, the touch structure layer is located on a side, close to the base substrate, of the display structure layer.