Display Panel Voltage Mesh Layout for Uniform Sub-Pixel Bias

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Solution Overview

Problem

Existing display devices face challenges in maintaining consistent panel constant voltage distribution due to voltage drop defects, which can affect the performance and uniformity of the display.

Innovation Solution

The implementation of horizontal and vertical panel constant voltage lines arranged in a mesh form within the display area, with vertical panel constant voltage lines formed on the same layer as vertical bypass data lines, and the use of horizontal and vertical low power voltage lines also arranged in a mesh form to prevent voltage drops.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional voltage transmission lines are used, then device complexity is reduced, but voltage drop defects occur causing inconsistent panel constant voltage distribution

Engineering Contradiction:

Improvevoltage distribution consistencyVSAvoidvoltage line configuration

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The voltage transmission system is segmented into multiple independent voltage lines (first voltage line, second voltage line, third voltage line, fourth voltage line) that are spatially separated and extend in different directions. Each voltage line serves specific sub-pixel circuits, dividing the overall voltage distribution task into smaller segments to reduce voltage drops and improve consistency.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a fourth dimension by extending voltage lines in multiple directions (horizontal and vertical) rather than a single linear path. The first and second voltage lines extend in a first direction while the third and fourth voltage lines extend in a second direction perpendicular to the first, creating a two-dimensional voltage distribution network that reduces path length and voltage drops.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Reliability

If more voltage lines are added to prevent voltage drops, then voltage distribution consistency improves, but manufacturing complexity increases

Engineering Contradiction:

Improvevoltage distribution consistencyVSAvoidfabrication process

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent merges the voltage transmission function with existing conductive structures in the display device. The first and second voltage lines are formed using the same fabrication process and material layers as other circuit conductors, while the third and fourth voltage lines utilize additional conductive layers that are already part of the standard manufacturing sequence, integrating voltage distribution into the overall device fabrication rather than adding separate processes.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250356796A1Display device and electronic device including the same

Publication Date: 2025.11.20 SAMSUNG DISPLAY CO LTD

AI summary

A display device comprises sub-pixel circuits arranged in a first direction and a second direction, a horizontal panel constant voltage line extending in the first direction and transmitting a panel constant voltage to the sub-pixel circuits, a vertical panel constant voltage line disposed on the horizontal panel constant voltage line, extending in the second direction, and transmitting the panel constant voltage to the horizontal panel constant voltage line, and a vertical bypass data line disposed on a same layer as the vertical panel constant voltage line, extending in the second direction, and transmitting a data voltage to the sub-pixel circuits.