Display Panel Data Line Structure for Faster Pixel Charging

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Solution Overview

Problem

Conventional liquid-crystal display panels face challenges in increasing the charging rate of data voltage to pixels, leading to reduced display quality due to capacitance and resistance issues in the substrate structure.

Innovation Solution

The display panel design includes a specific cross-sectional structure with separated and thicker conductive layers for the data line and connection electrode, and a reinforcing layer to enhance the substrate's strength, reducing capacitance and increasing the charging rate by optimizing the channel length and material distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the data line and connection electrode are made thicker to reduce resistance, then the charging rate improves, but the substrate becomes more prone to deformation during manufacturing

Engineering Contradiction:

Improvecharging rateVSAvoidsubstrate deformation

Core Design Contradiction:

SpeedVSStability of the object's composition

Solution Approach 1:

The conductive structure is divided into separate data line and connection electrode components with distinct functions. The data line has a first thickness optimized for low resistance, while the connection electrode has a second thickness optimized for mechanical stability, allowing each segment to be optimized independently without compromising the other

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the conductive structure have different thickness properties tailored to their specific functional requirements. The data line region has greater thickness for electrical performance, while the connection electrode region has appropriate thickness for mechanical support, creating local optimization throughout the substrate

Inventive Principle:

Principle #3Local quality

2Speed

If the channel length is reduced to increase the charging rate, then the RC delay decreases, but the manufacturing precision requirements increase

Engineering Contradiction:

Improvecharging rateVSAvoidchannel length control

Core Design Contradiction:

SpeedVSManufacturing precision

Solution Approach 1:

The channel length is optimized to a specific range (0.5μm to 2μm) that balances the competing requirements of fast charging rate and manufacturability. This parameter optimization allows the system to achieve high performance while remaining compatible with standard manufacturing capabilities

Inventive Principle:

Principle #35Parameter changes

3Speed

If multiple conductive layers are added to reduce capacitance, then the charging rate improves, but the device complexity increases

Engineering Contradiction:

Improvecharging rateVSAvoidconductive layer structure

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The capacitance issue is addressed by extracting and separating the data line and connection electrode into distinct structural elements with different thicknesses. This extraction allows each component to be optimized for its specific function while reducing unwanted capacitive coupling between them

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP3385986B1Display panel and display device having the same

Publication Date: 2025.01.01 SAMSUNG DISPLAY CO LTD

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AI summary

A display panel includes a base substrate. A semiconductor layer is disposed on the base substrate. A source electrode and a drain electrode are disposed on the semiconductor layer. A first insulating layer is disposed on both the source electrode and the drain electrode. A data line is disposed on the first insulating layer. The data line is electrically connected to the source electrode via a contact hole penetrating through the first insulating layer.