LCD Image Data Compensation Through Polarity Accumulation Timing

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Solution Overview

Problem

Liquid crystal display (LCD) panels experience flickering due to impurity ions interfering with the electric field under direct current (DC) bias when in a single polarity for a long period, exacerbated by uneven frame durations.

Innovation Solution

A display apparatus and method that calculates polarity accumulation time and adjusts voltage polarity based on threshold values to prevent flickering by alternating polarity patterns.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the LCD panel maintains a single polarity for a long period, then the display operation is simplified, but impurity ions interfere with the electric field causing flicker

Engineering Contradiction:

Improvedisplay operation complexityVSAvoiddisplay stability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent implements periodic polarity switching of the LCD panel, alternating between positive and negative polarities at defined intervals. This periodic action prevents impurity ions from accumulating and interfering with the electric field, thereby eliminating flicker while maintaining manageable operational complexity through automated polarity management

Inventive Principle:

Principle #19Periodic action

2Adaptability or versatility

If even frames are longer than odd frames, then the display can accommodate variable content requirements, but the LCD apparatus flickers more

Engineering Contradiction:

Improveframe duration adaptabilityVSAvoiddisplay stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent introduces dynamic polarity management where the polarity switching timing is adapted based on frame duration variations. The system dynamically adjusts the polarity accumulation time calculation to account for unequal frame lengths, ensuring that polarity switching occurs at optimal moments regardless of whether even or odd frames are longer, thereby preventing flicker while preserving frame duration flexibility

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent employs feedback mechanisms by calculating polarity accumulation time based on actual frame timing information. The system monitors frame durations and uses this feedback to determine appropriate polarity switching points, ensuring that even with variable frame lengths, the polarity management prevents ion interference and flicker

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250273178A1Display apparatus and compensating method of image data

Publication Date: 2025.08.28 NOVATEK MICROELECTRONICS CORP

AI summary

A compensating method of image data is provided. The compensating method includes: calculating a polarity accumulation time of a positive polarity and a negative polarity of the image data; and determining whether to compensate a voltage polarity of the image data according to the polarity accumulation time.