Display Control Abnormality Testing Synchronization

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Solution Overview

Problem

Existing techniques for testing display control apparatuses fail to accurately assess control abnormalities during development, leading to excessive determination of abnormality and requiring multiple apparatuses with complex calibration, including cameras and precise timing adjustments.

Innovation Solution

A control test apparatus that acquires pre-processed images and test data, with a controller that determines abnormality only after a predetermined time has elapsed from the input of test data to the image, ensuring synchronization and preventing false abnormality determinations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If test data and images are input simultaneously to the inspection module using buffer storage, then timing synchronization is improved, but the technique cannot conduct complex tests during development and requires multiple apparatuses with complex calibration

Engineering Contradiction:
Improvetiming synchronizationVSAvoidapparatus complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent combines the test data generation and image processing functions into a single control test apparatus. The controller integrates both the buffer storage function for test data and the image reception function, eliminating the need for separate camera apparatuses and their calibration systems. This merging maintains timing synchronization while reducing overall system complexity.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The control test apparatus is designed with multi-functionality, serving both as a test data generator and an image receiver with built-in buffer storage. This universal apparatus can conduct complex tests during development phases without requiring additional specialized equipment, thereby reducing device complexity while maintaining precise timing control.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Productivity

If determination is performed immediately upon receiving test data and images, then testing speed is improved, but excessive determination of abnormality occurs due to timing mismatch

Engineering Contradiction:
Improvetesting speedVSAvoidabnormality determination accuracy
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The controller performs preliminary buffering of test data before image processing occurs. By pre-storing test data in the buffer with timing information, the system prepares the data in advance, allowing subsequent determination to be performed accurately without timing mismatch. This preliminary action maintains testing speed while preventing false abnormality determinations.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The controller implements feedback control by continuously monitoring the timing relationship between received images and buffered test data. When a timing mismatch is detected, the controller adjusts the determination timing accordingly, providing feedback that prevents excessive abnormality determination while maintaining efficient testing throughput.

Inventive Principle:
Principle #23Feedback

3Measurement precision

If multiple apparatuses with calibration are used for image capture and test, then measurement capability is improved, but calibration time and setup complexity increase

Engineering Contradiction:
Improveimage capture capabilityVSAvoidcalibration time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The patent extracts the calibration requirement entirely from the system by eliminating camera apparatuses and their associated calibration procedures. The control test apparatus receives images directly without optical capture, removing the need for time-consuming calibration of time, position, and color parameters while maintaining sufficient measurement capability for control testing.

Inventive Principle:
Principle #2Taking out (Extraction)

Data Source

PatentUS10878772B2Apparatus and method for testing for abnormal control by a display control apparatus
Publication Date: 2020.12.29 MITSUBISHI ELECTRIC MOBILITY CORP
  • US10878772B2 patent drawing
  • US10878772B2 patent drawing
  • US10878772B2 patent drawing

AI summary

Provided is a technique for preventing excessive determination that control in a display control apparatus is abnormal. A control test apparatus includes an acquisition unit and a controller. The controller determines, whenever necessary, on the basis of a second image that is output from the display control apparatus and first test data that is acquired in the acquisition unit, whether the control in the display control apparatus over the display apparatus is abnormal. The controller stops the determination until a predetermined time elapses from a first time point, the predetermined time being equal to or greater than a time from the first time point at which the first test data is input to the controller to a second time point at which the second image is input to the controller.