Sub-pixel Electrode Polarity and Driving Circuit for LCD Response

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional multi-domain vertical alignment (MVA) liquid crystal displays require multiple driving devices and additional signal lines when dividing pixel electrodes into sub-pixels, increasing complexity and manufacturing difficulty.

Innovation Solution

The pixel electrode array is divided into structurally connected sub-pixel electrodes with opposite polarities, allowing a single driving switch device to control each pixel, eliminating the need for additional signal lines and reducing response time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If the pixel electrode is divided into multiple sub-pixel electrodes with opposite polarities, then the liquid crystal molecular response time is reduced, but the number of driving devices and signal lines is doubled

Engineering Contradiction:

Improveliquid crystal molecular response timeVSAvoidnumber of driving devices and signal lines

Core Design Contradiction:

Loss of timeVSDevice complexity

Solution Approach 1:

The pixel electrode is divided into multiple sub-pixel electrodes (first sub-pixel electrode and second sub-pixel electrode) with opposite polarities, each capable of independently controlling liquid crystal molecule orientation in different regions, thereby reducing response time while maintaining a unified driving structure

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Multiple sub-pixel electrodes with opposite polarities are connected to a single driving switch device through a shared signal line, merging the driving functions into one unified control structure, which reduces the number of driving devices and signal lines while still achieving the response time reduction benefit

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

If additional wire is used to connect sub-pixel electrodes with the same polarity, then a single switch can control multiple sub-pixels, but the complexity of electric circuit and manufacturing difficulty increase

Engineering Contradiction:

Improvesingle switch controlling multiple sub-pixelsVSAvoidmanufacturing difficulty and circuit complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The single driving switch device and shared signal line serve multiple sub-pixel electrodes simultaneously, making the driving structure universal and multi-functional, capable of controlling both first and second sub-pixel electrodes without requiring separate dedicated circuits for each

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This configuration reduces the complexity of the electric circuit and manufacturing process while maintaining reduced liquid crystal molecule response time without increasing the number of driving devices.

Implementation Method 1

Lateral electric field is created on the slits to reduce response time of liquid crystal molecules

Methodology Applied

Scientific EffectElectric field: Electric Field

Data Source

PatentUS8077285B2Liquid crystal display including neighboring sub-pixel electrodes with opposite polarities in the same pixel

Publication Date: 2011.12.13 AU OPTRONICS CORP

AI summary

A liquid crystal display includes an upper substrate, a lower substrate and a liquid crystal layer interposed between the upper substrate and the lower substrate. The lower substrate includes a pixel array divided into a plurality of columns of pixel areas and a plurality of rows of pixel areas. Each pixel area includes a upper sub-pixel electrode, a lower sub-pixel electrode insulated to the upper sub-pixel electrode and a TFT switch electrically connected to the lower sub-pixel electrode. The upper sub-pixel electrode is electrically connected to a lower sub-pixel electrode of a previous column, and the lower sub-pixel electrode is electrically connected to a upper sub-pixel electrode of a next column.