Mask Component for OLED Common Electrode Deposition

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Solution Overview

Problem

The common electrode in the electronic component region of OLED display panels affects light transmittance, necessitating an improvement to maintain image quality and functionality, especially for camera modules and electronic components.

Innovation Solution

A mask component comprising a first and second mask plate, where the first mask plate includes a shield region, an open region, and an electronic component shield region connected by a connecting shield region, and the second mask plate corresponds to the first mask plate's open and shield regions to evaporate the common electrode, ensuring no electrode is present in the electronic component shield region, thereby optimizing light transmittance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a common electrode is disposed on the entire layer including the electronic component region, then the electrode provides electrical functionality, but it reduces light transmittance and affects camera module quality

Engineering Contradiction:

Improveelectrical functionalityVSAvoidlight transmittance

Core Design Contradiction:

ReliabilityVSIllumination intensity

Solution Approach 1:

The mask plate is divided into multiple regions: a first open region for the display area, a second open region for the camera module area, and a shield region for the electronic component region. This segmentation allows the common electrode to be deposited only in appropriate areas, excluding the electronic component region to maintain light transmittance while preserving electrical functionality in necessary areas.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the mask plate are designed with different transparency characteristics. The first and second open regions allow electrode deposition, while the shield region blocks deposition. This creates local quality variations in the common electrode distribution, ensuring electrical functionality where needed and light transmittance where camera modules are located.

Inventive Principle:

Principle #3Local quality

2Illumination intensity

If the common electrode is completely removed from the electronic component region, then light transmittance is improved, but electrical connectivity may be compromised

Engineering Contradiction:

Improvelight transmittanceVSAvoidelectrical connectivity

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

The connecting shield region acts as an intermediary structure that connects the shield region (electronic component region) to the first shield region (display region). This connecting structure allows controlled electrical connectivity while maintaining the shield's primary function of blocking electrode deposition in the electronic component region, thus preserving light transmittance.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Illumination intensity

If a shield region is added to block electrode deposition in the electronic component area, then light transmittance is maintained, but the device structure becomes more complex

Engineering Contradiction:

Improvelight transmittanceVSAvoidmask plate structure

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The mask plate integrates multiple functions into a single component: it defines the deposition pattern for the common electrode, provides structural support during the evaporation process, and creates the necessary shield regions and connecting structures. This multi-functionality reduces the need for additional separate components, thereby managing device complexity while achieving light transmittance improvement.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

The solution effectively minimizes the impact of the common electrode on light transmittance, enhancing the quality of camera modules and electronic components by carefully configuring the mask plates to control the deposition of the common electrode, ensuring it is not present in critical shield regions.

Implementation Method 1

the first mask plate is configured to evaporate a common electrode to obtain a first region of the common electrode

Methodology Applied

Scientific EffectEvaporation: Evaporation

Implementation Method 2

the first mask plate is configured to evaporate a common electrode to obtain a first region of the common electrode

Methodology Applied

Scientific EffectPhysical Vapour Deposition: Physical Vapour Deposition

Data Source

PatentUS11309374B2Mask component

Publication Date: 2022.04.19 WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD

AI summary

A mask component includes a first mask plate and a second mask plate, and the first mask plate includes a first shield region, a first open region disposed in the first shield region, an electronic component shield region disposed in the first open region, a connecting shield region disposed in the first open region. The electronic component shield region is connected to the first shield region by the connecting shield region. The connecting shield region includes a first connecting shield region disposed on one side of the electronic component shield region and a second connecting shield region disposed on another side of the electronic component shield region, and the first mask plate is configured to evaporate a common electrode to obtain a first region of the common electrode.