Multi-Projector State Comparison for Reliable Abnormality Detection

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Solution Overview

Problem

Existing systems fail to accurately determine projector abnormalities when load information is incomplete or unreliable, leading to incorrect maintenance decisions.

Innovation Solution

A method and system that acquires and compares state information from multiple projectors displaying different portions of an image, using a control device to determine abnormalities by comparing fan rotation speeds, temperature, and cumulative usage times, with data complementation and error handling to ensure accurate assessment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If load information is acquired from a single projector, then the system is simple, but the determination reliability is low when information is incomplete or unreliable

Engineering Contradiction:

Improveabnormality determination reliabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines state information from multiple projectors (first projector and second projector) to determine abnormalities. The control device acquires state information from both projectors and uses this combined data to determine whether the first projector is abnormal, thereby improving determination reliability through data redundancy and cross-validation.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The control device acts as an intermediary that collects, compares, and analyzes state information from multiple projectors. It mediates the abnormality determination process by using state information from the second projector as a reference to accurately assess the condition of the first projector, even when the first projector's data is incomplete or unreliable.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If state information from multiple projectors is acquired and compared, then the determination accuracy is improved, but the information processing complexity increases

Engineering Contradiction:

Improveabnormality detection accuracyVSAvoiddata processing complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent segments the abnormality determination process into distinct steps: acquiring state information from the first projector, acquiring state information from the second projector, comparing the two data sets, and determining abnormalities based on the comparison. This segmentation makes the complex processing manageable and systematic.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system uses feedback by comparing state information from the first projector with state information from the second projector. The control device analyzes differences between the two data sets and uses this feedback to accurately determine whether the first projector is abnormal, improving detection accuracy through comparative analysis.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12483681B2Abnormality determination method, control device, and non-transitory computer-readable storage medium storing program

Publication Date: 2025.11.25 SEIKO EPSON CORP

AI summary

An abnormality determination method includes: acquiring first information indicating a state of a first display device configured to display a first portion of a first image in a first area of a display area that displays the first image; acquiring second information indicating a state of a second display device configured to display a second portion of the first image that is different from the first portion in a second area of the display area that is different from the first area; and determining whether the first information is abnormal based on the second information.