Array Substrate Polarity Inversion for LCD Power Reduction

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing liquid crystal display (LCD) technologies experience significant energy loss and increased power consumption due to frequent deflection of liquid crystal molecules during polarity inversion driving modes, especially in color displaying images, leading to inefficiencies in sub-pixel connections with data and gate lines.

Innovation Solution

The proposed solution involves an array substrate design where sub-pixels of the same type are connected to the same data line and different gate lines, reducing energy loss by maintaining a consistent polarity for sub-pixels connected to each data line, thereby minimizing voltage fluctuations and power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If dot inversion driving mode is used, then polarity inversion between adjacent sub-pixels is achieved, but frequent deflection of liquid crystal molecules causes energy loss and increased power consumption

Engineering Contradiction:

Improvedisplay image qualityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The invention segments the pixel array into different inversion regions (dot inversion regions and line inversion regions) with different polarity inversion patterns. By dividing the display area into regions with different driving modes, the patent reduces the frequency of liquid crystal molecule deflection in certain areas, thereby lowering energy loss while maintaining display quality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different inversion patterns to different local regions of the pixel array. Specifically, certain rows or columns are configured with line inversion mode instead of dot inversion, creating local variations in polarity inversion behavior. This local quality approach allows reduction of power consumption in specific regions without compromising overall display performance.

Inventive Principle:

Principle #3Local quality

2Reliability

If each sub-pixel is connected to data lines and gate lines through TFTs, then polarity inversion is achieved, but connection structure causes frequent voltage switching and energy loss

Engineering Contradiction:

Improvepolarity inversion controlVSAvoidenergy loss in connection structure

Core Design Contradiction:

ReliabilityVSUse of energy by stationary object

Solution Approach 1:

The patent inverts the conventional approach by using line inversion mode in certain regions instead of dot inversion mode. This inversion of the driving strategy reduces the frequency of voltage switching on data lines, thereby reducing energy loss in the connection structure while maintaining polarity inversion control for display quality.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS9460670B2Array substrate, liquid crystal display panel and liquid crystal display device

Publication Date: 2016.10.04 BEIJING BOE OPTOELECTRONCIS TECH CO LTD

AI summary

An array substrate, a liquid crystal display panel and a liquid crystal display device. The array substrate comprises data lines, gate lines and a pixel array provided on a base substrate. Each data line is connected with at least one type of sub-pixels in the pixel array, and sub-pixels of same type connected with a same data line have same polarity, and the sub-pixels connected with the same data line are connected with different gate lines, respectively.