Display Base Layer Inner Hole Layout for Pixel Light Isolation

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Solution Overview

Problem

Current display devices face challenges in ensuring the reliability of pixel circuit performance due to issues with light interference and structural stability, particularly with the alignment and positioning of light emitting elements relative to the pixel circuit components.

Innovation Solution

Incorporating an inner hole in the base layer of the display device that forms an air-pocket and interfaces with the base layer, along with a line-free area and electrode-free areas, to prevent light interference and improve alignment reliability, and using a light non-transmissive layer to control light paths and reduce interference with pixel circuit components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If light emitting elements are positioned close to pixel circuit components to improve display density, then area utilization is improved, but light interference with pixel circuit components increases

Engineering Contradiction:
Improvearea utilizationVSAvoidlight interference
Core Design Contradiction:
Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a line-free area that segments the base layer into distinct regions: a pixel circuit formation area where pixel circuits are located, and a line-free area where lower lines are absent. This spatial segmentation prevents light interference by ensuring that light emitting elements positioned in the line-free area do not interfere with pixel circuit components in the pixel circuit formation area, while still maintaining high area utilization through efficient spatial arrangement.

Inventive Principle:
Principle #1Segmentation

2Ease of manufacture

If lower lines are extended across the entire base layer to simplify manufacturing, then manufacturing complexity is reduced, but light interference with light emitting elements increases

Engineering Contradiction:
Improvemanufacturing simplicityVSAvoidlight interference
Core Design Contradiction:
Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by creating a line-free area with specific properties (absence of lower lines) in a localized region of the base layer, while other regions maintain their standard structure with lower lines. This allows the light emitting elements in the line-free area to be free from light interference, while the rest of the device maintains manufacturing simplicity through the presence of lower lines in other areas.

Inventive Principle:
Principle #3Local quality

3Volume of moving object

If pixel circuit components are positioned closer to light emitting elements to reduce device size, then device compactness is improved, but alignment precision requirements increase

Engineering Contradiction:
Improvedevice sizeVSAvoidalignment precision
Core Design Contradiction:
Volume of moving objectVSManufacturing precision

Solution Approach 1:

The patent resolves the alignment precision issue by transitioning to a three-dimensional arrangement where the line-free area is defined in the planar dimension, allowing light emitting elements to be positioned above this area at a different vertical level. This dimensional separation enables compact device size while maintaining sufficient alignment tolerance, as the light emitting elements are vertically positioned over the line-free area rather than requiring precise lateral alignment with pixel circuit components.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

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

Enhances the reliability and efficiency of pixel circuit performance by minimizing light interference and structural damage, improving alignment and stability of light emitting elements, and maintaining the structural integrity of the pixel circuit components.

Implementation Method 1

the inner hole may form an air-pocket in the base layer

Methodology Applied
Scientific EffectLight absorption: Absorption (EM radiation)

Implementation Method 2

using a light non-transmissive layer to control light paths and reduce interference with pixel circuit components

Methodology Applied
Scientific EffectLight blocking: Absorption (EM radiation)

Data Source

PatentUS20240297164A1Display device and method of manufacturing the display device
Publication Date: 2024.09.05 SAMSUNG DISPLAY CO LTD
  • US20240297164A1 patent drawing
  • US20240297164A1 patent drawing
  • US20240297164A1 patent drawing

AI summary

A display device includes a base layer including an inner hole, a pixel circuit layer disposed on the base layer and including a pixel circuit, and a light emitting element disposed on the pixel circuit layer.