Display Dithering Map Calibration to Prevent Flicker

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Solution Overview

Problem

In display driving processes, flicker effects occur due to overlapping carry points in first and second dithering maps, affecting display quality.

Innovation Solution

A display driving device and method that includes a processing module to analyze and compare first and second dithering maps, calibrating the second dithering map when overlapping carry points are detected to generate a calibrated map, thereby avoiding same carry points in subsequent processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If first dither processing and second dither processing are performed using dithering maps with same carry points, then dither processing can be completed, but obvious brightness changes and flicker effects occur in displayed image

Engineering Contradiction:

Improvedither processing efficiencyVSAvoiddisplay quality

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The processing module performs preliminary comparison between the first dithering map and second dithering map before actual display processing. By detecting same carry points in advance and calibrating the second dithering map beforehand, the system prevents flicker effects from occurring in the displayed image while maintaining efficient dither processing.

Inventive Principle:

Principle #10Preliminary action

2Device complexity

If dithering maps with same carry points are used for processing, then processing simplicity is maintained, but flicker effects and brightness changes affect display quality

Engineering Contradiction:

Improvedither processing complexityVSAvoiddisplay quality

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The system performs preliminary comparison and calibration of dithering maps before display processing. The processing module detects same carry points between first and second dithering maps in advance, and calibrates the second dithering map to avoid flicker effects, thereby maintaining processing simplicity while ensuring display quality.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The processing module compares the first dithering map with the second dithering map and uses the comparison results to calibrate the second dithering map. This feedback mechanism ensures that same carry points are eliminated, preventing flicker effects while maintaining a relatively simple processing structure.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12494152B1Display driving device configured to compare a first dithering map with a second dithering map, and display driving method

Publication Date: 2025.12.09 HIMAX TECH LTD

AI summary

The display driving device includes a processing module and a dithering module. The processing module is coupled to the dithering module. The processing module is configured to analyze reference image data to record a first dithering map, and compare the first dithering map with a second dithering map of the dithering module. When the processing module determines that the first dithering map and the second dithering map have same carry points at same pixel positions, the processing module is further configured to calibrate the second dithering map to generate a calibrated second dithering map.