Self-Diagnostic Imaging Method for Display Device Color Shift Detection

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Solution Overview

Problem

As the number of video formats supported by equipment increases, it becomes difficult to distinguish between image quality deterioration caused by erroneous display settings and equipment malfunctions, making it challenging to determine the source of color shifts in diagnostic images.

Innovation Solution

A self-diagnostic imaging method that involves generating a reference signal, encoding and outputting it, decoding and displaying it on a display device, cutting out an image corresponding to the reference signal, and comparing it with the original to determine if the image quality deterioration is due to display settings or equipment malfunctions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the number of video formats supported by equipment increases, then adaptability is improved, but image quality deterioration occurs more readily due to erroneous settings

Engineering Contradiction:

Improvenumber of video formats supportedVSAvoidimage quality

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The system performs preliminary encoding of a reference signal image before transmission to the display device. This pre-encoded reference signal serves as a baseline for later comparison, enabling the system to detect whether image quality deterioration occurs during transmission or processing

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The display device transmits the decoded reference signal image back to the image processing device for comparison with the original encoded reference signal. This feedback mechanism enables automatic detection and identification of the source of image quality issues

Inventive Principle:

Principle #23Feedback

2Device complexity

If image quality deterioration occurs, then it is difficult to distinguish between erroneous display settings and equipment malfunctions

Engineering Contradiction:

Improvedifficulty of diagnosisVSAvoiddiagnosis accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The system extracts the reference signal image from the transmitted video content and processes it separately for diagnostic purposes. By isolating this test signal, the system can specifically evaluate the transmission and display chain without interference from regular video content

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The reference signal image contains color information that is specifically designed to detect color shifts and image quality deterioration. By monitoring changes in color characteristics of the reference signal, the system can accurately diagnose the source of image quality issues

Inventive Principle:

Principle #32Color changes

Data Source

PatentUS11011096B2Self-diagnostic imaging method, self-diagnostic imaging program, display device, and self-diagnostic imaging system

Publication Date: 2021.05.18 SHARP KK

AI summary

A display device is for displaying an image generated by an image processing device. The display device includes: a video decoding and input unit that receives an encoded image of a reference signal generated by the image processing device, and decodes the encoded image; a video display unit that performs image quality correction of the decoded image and displays, on a display panel, the image to which the image quality correction has been performed; and an image cut-out unit that cuts out an image at a position corresponding to the reference signal from an image to which the image quality correction has not been performed and transmits the cut out image to which the image quality correction has been performed, to the image processing device.