Display Bias Scan Line Segmentation for Static Charge Protection

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Solution Overview

Problem

The concentration of charges on scan lines during the doping process can lead to static electricity generation, which damages semiconductor layers and transistors in display devices, causing pixel damage.

Innovation Solution

The implementation of a bias scan line comprising multiple sub-bias scan lines spaced apart and connected by connecting lines helps disperse charge concentration, reducing static electricity and preventing pixel damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single bias scan line is used, then the structure is simple, but charge concentration occurs leading to static electricity damage

Engineering Contradiction:

Improvebias scan line structureVSAvoidstatic electricity damage

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The single bias scan line is divided into multiple sub-bias scan lines (first sub-bias scan line, second sub-bias scan line, etc.) that are spaced apart from each other. This segmentation disperses the charge concentration that would otherwise occur on a single line, reducing static electricity generation while maintaining the necessary biasing function across the display panel.

Inventive Principle:

Principle #1Segmentation

2Object-affected harmful factors

If multiple sub-bias scan lines are used, then static electricity is reduced, but the device complexity increases

Engineering Contradiction:

Improvestatic electricity damageVSAvoidbias scan line structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

Multiple sub-bias scan lines are electrically connected through connecting lines to form an integrated bias scan line structure. The connecting lines join the sub-bias scan lines at their ends, creating a unified system that functions as a single bias scan line while maintaining the protective benefits of multiple spaced-apart conductive elements.

Inventive Principle:

Principle #5Merging (Combining)

3Object-affected harmful factors

If sub-bias scan lines are spaced apart, then charge concentration is dispersed, but the area occupied increases

Engineering Contradiction:

Improvecharge concentrationVSAvoidbias scan line area

Core Design Contradiction:

Object-affected harmful factorsVSArea of stationary object

Solution Approach 1:

The sub-bias scan lines are positioned at specific locations within the pixel structure, with each line associated with specific transistors (e.g., seventh and eighth transistors). The spacing and positioning are optimized to disperse charge concentration at critical locations while maintaining compact overall layout that does not significantly increase the pixel area.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20250246141A1Display device

Publication Date: 2025.07.31 SAMSUNG DISPLAY CO LTD

AI summary

A display device includes a scan line extending in a first direction, where the scan line includes a write scan line and a bias scan line, a data line extending in a second direction crossing the first direction, and a pixel connected to the scan line and the data line. The bias scan line includes a plurality of sub-bias scan lines spaced apart from each other in the first direction and a connecting line connected to the sub-bias scan lines.