In-Cell Touch Electrode Layering for Thin Display Modules

Solution Overview

Problem

The high production cost and thick thickness of intelligent display apparatuses equipped with touch functions pose challenges in cost reduction and product thinning.

Innovation Solution

The implementation of an in-cell touch scheme within the display panel, where the first touch electrode and main body portions are disposed in the same layer as the first electrode, and the bridge portion is located in the isolation structure layer, eliminating the need for additional touch screens and reducing the number of required masks and module thickness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a separate touch screen is added to the display panel, then the touch function is achieved, but the production cost increases and the thickness increases

Engineering Contradiction:

Improvetouch functionVSAvoidproduction cost

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges the touch electrode structure with the display panel's existing electrode layers. The first touch electrode is integrated into the same layer as the first electrode of the light-emitting device, and the second touch electrode is integrated into the isolation structure layer, eliminating the need for a separate touch screen assembly and reducing production cost while maintaining touch functionality

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent makes the display panel's electrode layers serve dual functions: the first electrode serves both as a light-emitting electrode and as the first touch electrode, while the isolation structure layer serves both as an isolation layer and as the second touch electrode. This multi-functionality reduces the number of components and lowers production cost

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If a separate touch screen is added to the display panel, then the touch function is achieved, but the thickness of the product increases

Engineering Contradiction:

Improvetouch functionVSAvoidthickness

Core Design Contradiction:

Adaptability or versatilityVSLength of stationary object

Solution Approach 1:

The patent merges the touch electrode structure with the display panel's existing electrode layers. The first touch electrode is integrated into the same layer as the first electrode of the light-emitting device, and the second touch electrode is integrated into the isolation structure layer, eliminating the need for a separate touch screen assembly and reducing production cost while maintaining touch functionality

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent utilizes the vertical layering of the display panel structure to accommodate touch electrodes. By placing touch electrodes in different layers (first touch electrode in the light-emitting device layer, second touch electrode in the isolation structure layer), the patent achieves three-dimensional integration that maintains thinness while providing complete touch functionality

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS12254149B2Touch display panel and manufacturing method therefor, and display apparatus

Publication Date: 2025.03.18 HEFEI VISIONOX TECH CO LTD

AI summary

Disclosed are a touch display panel and a manufacturing method therefor, and a display apparatus. A problem of high cost and a thick thickness of a touch display apparatus is solved. The touch display panel includes: a substrate; an isolation structure layer with a plurality of isolation openings; a plurality of light-emitting devices located in the isolation openings, the light-emitting device including a first electrode facing the substrate; and a touch electrode including a first touch electrode and a second touch electrode. The second touch electrode includes a plurality of main body portions and a plurality of bridge portions disposed in different layers. The first touch electrode, the plurality of main body portions and the first electrode are disposed in a same layer; or the first touch electrode, the plurality of main body portions and the isolation structure layer are disposed in a same layer.