Multi-Vision Display Synchronization via Reverse Scanning

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Solution Overview

Problem

In multi-vision devices, the progressive scanning method leads to noticeable image misalignment between upper and lower display sets when displaying fast-moving images, causing temporal differences and vertical misalignment, which disrupts the viewing experience.

Innovation Solution

Implementing a reverse-progressive scanning method on lower display sets, along with vertical inversion of scanned images, to synchronize image output and prevent misalignment, and determining scanning methods based on display set positions and image movement speed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a progressive scanning method is used to display images on multiple display sets, then the image can be displayed sequentially from upper left to lower right, but temporal differences cause noticeable image misalignment between upper and lower display sets when fast-moving images are displayed

Engineering Contradiction:

Improveimage display operationVSAvoidimage alignment precision

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The patent applies reverse progressive scanning to lower display sets (even-numbered rows) while maintaining progressive scanning on upper display sets (odd-numbered rows). This inversion of scanning direction in specific rows compensates for the temporal differences caused by sequential scanning, ensuring that images are displayed simultaneously across all display sets without vertical misalignment, thus resolving the contradiction between ease of operation and image alignment precision

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent differentiates scanning methods based on the local position of display sets within the multi-vision device. Odd-numbered rows use progressive scanning while even-numbered rows use reverse progressive scanning. This localized differentiation of scanning quality ensures that each display set contributes to synchronized image display, eliminating misalignment artifacts while maintaining operational simplicity

Inventive Principle:

Principle #3Local quality

2Device complexity

If sequential scanning is used to display images line-by-line, then the scanning process is simple, but temporal differences between scanning upper and lower parts cause stepped portions to be noticeably viewed

Engineering Contradiction:

Improvescanning process complexityVSAvoidvisual distortion

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

By inverting the scanning direction for even-numbered rows, the patent ensures that the temporal sequence of image display is synchronized across all rows. This prevents the stepped portions from being noticeably viewed while maintaining relatively simple scanning hardware, thus resolving the contradiction between device complexity and visual distortion

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS20170318259A1Multi-vision device

Publication Date: 2017.11.02 LG ELECTRONICS INC

AI summary

A multi-vision device can include a first display set configured to display a first split image of an entire image of content according to a progressive scanning method; a second display set disposed on a lower side of the first display set to display a second split image of the entire image; and a control unit configured to scan the second split image on the second display set according to a reverse-progressive scanning method, invert the scanned second split image vertically and display the inverted second split image on the second display set.