Display Pixel Circuit Shielding for Integrated Component Areas

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Solution Overview

Problem

Existing display apparatuses face challenges in integrating additional electronic components within the display area while maintaining high display quality and reducing power consumption.

Innovation Solution

The display apparatus incorporates a substrate with distinct areas featuring silicon-based and oxide-based transistors, separated by shielding layers of different materials, including amorphous silicon and metal, to accommodate both display and electronic components, and employs a manufacturing method using a single mask to form these layers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If electronic components are integrated into the display area, then the functionality of the display apparatus is expanded, but the display quality may deteriorate due to interference and the area available for display is reduced

Engineering Contradiction:

ImprovefunctionalityVSAvoiddisplay quality

Core Design Contradiction:

Adaptability or versatilityVSIllumination intensity

Solution Approach 1:

The display area is divided into a first area with first pixel circuits and a second area with second pixel circuits and electronic components. This segmentation allows different regions to serve different functions while maintaining overall display quality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Shielding layers are introduced as intermediary structures between electronic components and pixel circuits. These shielding layers block interference signals from electronic components, protecting the display quality while allowing electronic components to function within the display area.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If the number of TFTs connected to one light-emitting element is increased to accurately control light emission, then the control precision is improved, but the power consumption increases

Engineering Contradiction:

Improvecontrol precisionVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

Different types of transistors are used in different areas: oxide-based transistors in the first area for high precision control, and silicon-based transistors in the second area for lower power consumption operations. This local differentiation optimizes both control precision and power efficiency.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the material parameter of the transistor semiconductor layer between different areas. Oxide-based semiconductors provide high mobility for precise control, while silicon-based semiconductors offer lower power consumption characteristics, allowing optimization of both parameters across different regions.

Inventive Principle:

Principle #35Parameter changes

3Illumination intensity

If shielding layers are added to protect pixel circuits from interference, then the display quality is maintained, but the manufacturing complexity increases

Engineering Contradiction:

Improvedisplay qualityVSAvoidmanufacturing complexity

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

Multiple shielding layers with different materials are combined in a stacked configuration. The first shielding layer uses amorphous silicon and the second shielding layer uses metal materials, creating a composite shielding structure that provides comprehensive interference protection while managing manufacturing complexity through systematic integration.

Inventive Principle:

Principle #5Merging (Combining)

4Reliability

If different materials are used for shielding layers to optimize performance, then the shielding effectiveness is improved, but the manufacturing process becomes more complex

Engineering Contradiction:

Improveshielding effectivenessVSAvoidmanufacturing process

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The shielding structure uses composite materials with different properties: amorphous silicon for the first shielding layer providing baseline shielding, and metal materials for the second shielding layer providing enhanced shielding effectiveness. This composite approach optimizes performance while the systematic layering manages manufacturing complexity.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS12484304B2Display apparatus and method of manufacturing the same

Publication Date: 2025.11.25 SAMSUNG DISPLAY CO LTD

AI summary

A display apparatus includes: a substrate including a first area, and a second area adjacent to the first area; a plurality of first pixel circuits at the first area of the substrate, each of the plurality of first pixel circuits including a silicon-based transistor, and an oxide-based transistor; a plurality of second pixel circuits at the second area of the substrate, the plurality of second pixel circuits including transistors; a first shielding layer at the first area, the first shielding layer including a shielding pattern overlapping with the silicon-based transistor of each of the plurality of first pixel circuits; and a second shielding layer at the second area, the second shielding layer including a first through-hole between adjacent second pixel circuits from among the plurality of second pixel circuits. The first shielding layer and the second shielding layer include different materials from each other.