Display Device Subpixel Layout for Reduced Wiring and Power

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Solution Overview

Problem

Liquid crystal display devices face challenges in reducing manufacturing cost and power consumption while maintaining image quality and preventing image defects, particularly due to issues with grayscale stains and luminance sensitivity differences.

Innovation Solution

The display device employs a unique subpixel arrangement and data line configuration that alternates color subpixels vertically, uses fewer gate and data lines, and applies an S-factor compensation to driving transistors, reducing parasitic capacitance and optimizing data signal polarity for improved efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If conventional data line configuration is used, then all subpixels are connected uniformly, but manufacturing cost increases and power consumption increases due to more wiring

Engineering Contradiction:

Improvemanufacturing costVSAvoidwiring configuration

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The data lines are segmented into two types: first data lines connecting first and third color subpixels, and second data lines connecting second color subpixels. This segmentation allows for reduced wiring complexity while maintaining proper signal distribution to all subpixels, thereby reducing manufacturing cost without excessive wiring.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different data line configurations are applied to different color subpixels based on their specific luminance sensitivity characteristics. First and third color subpixels receive signals through first data lines, while second color subpixels receive signals through second data lines, optimizing the wiring structure for each local region's specific needs.

Inventive Principle:

Principle #3Local quality

2Device complexity

If conventional gate line configuration is used, then each horizontal line has dedicated gate lines, but device complexity and power consumption increase

Engineering Contradiction:

Improvegate line configurationVSAvoidpower consumption

Core Design Contradiction:

Device complexityVSUse of energy by stationary object

Solution Approach 1:

Adjacent gate lines are merged into shared gate lines that control multiple horizontal lines simultaneously. This merging reduces the total number of gate lines required, simplifying the gate line configuration and reducing power consumption while maintaining proper control of all subpixels.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

Shared gate lines serve multiple functions by controlling multiple horizontal lines of subpixels simultaneously. A single gate line can control subpixels across different horizontal lines, making the gate line structure more universal and efficient.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If uniform data signal polarity is applied to all subpixels, then driving is simplified, but image defects occur due to luminance sensitivity differences

Engineering Contradiction:

Improvedriving simplicityVSAvoidimage quality

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

Different data signal polarities are applied to different color subpixels based on their luminance sensitivity characteristics. Second color subpixels receive inverted polarity signals compared to first and third color subpixels, compensating for their higher luminance sensitivity and preventing image defects while maintaining differentiated driving control.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The polarity parameter of data signals is changed specifically for second color subpixels to compensate for their luminance sensitivity differences. By inverting the polarity for certain subpixels, the system corrects image quality issues without requiring complete redesign of the driving scheme.

Inventive Principle:

Principle #35Parameter changes

4Reliability

If more data lines are used to connect all subpixels, then signal distribution is improved, but parasitic capacitance increases and power consumption increases

Engineering Contradiction:

Improvesignal distributionVSAvoidparasitic capacitance

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

Data lines are segmented into first data lines and second data lines that serve different color subpixels. This segmentation reduces the total number of data lines required compared to a fully connected configuration, thereby reducing parasitic capacitance while maintaining adequate signal distribution to all subpixels through the segmented network.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20250278002A1Display device

Publication Date: 2025.09.04 LG DISPLAY CO LTD

AI summary

A display device can include first color subpixels arranged in a first row and disposed on a substrate, second color subpixels arranged in a second row and disposed on the substrate, and third color subpixels arranged in a third row and disposed on the substrate. Also, the display device can further include a first gate line disposed between the first row and the second row, the first gate line being connected to the first color subpixels arranged in the first row and a first group of subpixels among the second color subpixels arranged in the second row, and a second gate line disposed between the second row and the third row, the second gate line being connected a second group of subpixels among the second color subpixels arranged in the second row and the third color subpixels arranged in the third row.