Display Panel Light Blocking Layer Touch Integration

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Solution Overview

Problem

Current touch display technologies face challenges with complex processes, high costs, low transmittance, and reduced display area due to the need for complex semiconductor manufacturing and separate production of touch panels and display screens, particularly in in-cell structures.

Innovation Solution

A display panel incorporating a light blocking layer with electroconductive properties, where the isolation part within the light blocking layer serves as both a touch driving and sensing electrode, intersecting with scanning signal lines to achieve touch control functions, simplifying the structure and manufacturing process while improving transmittance and reducing production costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If both sensing electrode and emitting electrode are arranged in array substrate to achieve touch control function, then touch control function is achieved, but complex semiconductor manufacturing process must be used resulting in low production yield

Engineering Contradiction:

Improvetouch control functionVSAvoidsemiconductor manufacturing process

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent divides the touch control functions into two separate components: the light blocking layer (with emitting electrode function) and the scanning signal lines (with sensing electrode function). This segmentation allows each component to be manufactured using simpler, more suitable processes rather than requiring complex semiconductor manufacturing for both functions in a single substrate.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The light blocking layer serves dual purposes: it blocks light to define display areas and simultaneously acts as the emitting electrode for touch control. The scanning signal lines also serve dual purposes: scanning display signals and sensing touch signals. This multi-functionality reduces the need for separate dedicated structures.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Volume of moving object

If touch structure is embedded in pixel structure of display screen, then lightness and thinness are achieved, but effective area available for display is reduced leading to degradation of display effect

Engineering Contradiction:

Improvedisplay device thicknessVSAvoideffective display area

Core Design Contradiction:

Volume of moving objectVSArea of stationary object

Solution Approach 1:

The patent moves the emitting electrode function to the light blocking layer which is positioned in a different spatial dimension (layer) relative to the pixel structure. The scanning signal lines are arranged in different layers than the isolation parts, allowing touch functionality to be achieved without occupying the same planar space as display pixels, thus preserving effective display area.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Adaptability or versatility

If touch panel and display screen are manufactured separately and fit together, then touch control function is achieved, but complex process, high cost, low transmittance and thick module result

Engineering Contradiction:

Improvetouch control functionVSAvoidmanufacturing process

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges the touch control structure with the display screen structure by integrating the emitting electrode into the light blocking layer of the display and using the scanning signal lines for both display scanning and touch sensing. This combination eliminates the need for separate touch panel and display screen manufacturing and assembly processes.

Inventive Principle:

Principle #5Merging (Combining)

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 integrated touch and display structure results in a simpler manufacturing process, higher transmittance, reduced production costs, and improved product yield, along with better display quality by utilizing the light blocking layer as both an emitting and sensing electrode.

Implementation Method 1

a light blocking layer formed of a material with light blocking and electroconductive properties

Methodology Applied

Scientific EffectLight blocking: Absorption (EM radiation)

Implementation Method 2

the isolation part being further configured to emit a touch driving signal and/or receive a touch sensing signal

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS9946379B2Display panel, driving method thereof, and display device

Publication Date: 2018.04.17 BOE TECHNOLOGY GROUP CO LTD

AI summary

The present invention relates to the field of display technology, and particularly relates to a display panel, a driving method thereof, and a display device. The display panel comprises a light blocking layer formed of a material with light blocking and electroconductive properties, the light blocking layer including an isolation part electrically isolated from other part of the light blocking layer, the isolation part being further configured to emit a touch driving signal and/or receive a touch sensing signal to achieve a touch control function of the display panel. The display panel has both display function and touch control function, and has a simpler structure and a higher transmittance; the manufacturing process is simpler, and meanwhile, the production cost is reduced and the product yield is improved.