Image Data Path Failure Diagnosis by Output Comparison
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Solution Overview
Problem
Existing image processing devices face challenges in efficiently testing their image data paths due to the vast number of possible settings, making it impractical to prepare expected values for all configurations, which can lead to unreliable display operations, particularly in critical applications like automotive instrument panels.
Innovation Solution
The image processing device employs multiple image data paths with a test circuit that compares outputs under different settings without requiring externally provided expected values, using error detection codes to identify failures and adapt settings based on display device characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If comprehensive testing of all image data path settings is performed, then reliability of display operation is improved, but device complexity and testing time increase significantly
Solution Approach 1:
The patent segments the testing process by dividing image data paths into multiple groups and performing tests on representative paths from each group. Instead of testing every single image data path configuration, the system identifies key representative paths that capture the essential testing requirements, thereby reducing testing complexity while maintaining reliability coverage.
Solution Approach 2:
The patent applies partial action by performing tests on a subset of image data paths rather than all possible configurations. The testing focuses on critical paths and representative settings that provide sufficient coverage for reliability assurance without requiring exhaustive testing of every possible configuration combination.
2Measurement precision
If expected values are prepared for all possible settings, then measurement precision is improved, but loss of time and productivity decrease
Solution Approach 1:
The patent performs preliminary actions by pre-identifying representative image data paths and their corresponding expected test results. During the testing phase, the system can quickly compare actual outputs against these pre-prepared expected values for representative settings, avoiding the need to prepare expected values for all possible configurations while maintaining detection accuracy.
Solution Approach 2:
The patent uses copying by creating representative models of image data path behaviors. Instead of preparing expected values for every possible setting, the system establishes expected output patterns for representative configurations that can be used to infer the correctness of other configurations, reducing preparation time while maintaining measurement precision.
3Adaptability or versatility
If multiple image data paths are tested with varied settings, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a test circuit that can handle multiple image data path configurations through a unified testing framework. The test circuit is configured to accept varied settings and perform appropriate tests based on the representative paths identified, providing comprehensive adaptability without proportionally increasing circuit complexity through dedicated hardware for each configuration.
Solution Approach 2:
The patent introduces dynamics by making the testing process adaptive and configurable. The test circuit can dynamically adjust its operation based on which representative image data paths are being tested, allowing the same hardware to efficiently handle multiple testing scenarios with varied settings without requiring static dedicated circuits for each configuration.
Data Source
AI summary
An image processing device includes multiple image data paths of the same configuration and a test circuit. The test circuit may test the image data paths with a first setting set on each of the image data paths. The test circuit may further test the image data paths in a second state with a second setting set on each of the image data paths. The testing of the image data paths may be based on a comparison of the outputs of the image data paths. One of the image data paths processes a first image data stream with the first setting to provide a first processed image data stream to a first display device, and another of the image data paths processes a second image data stream with the second setting to provide a second processed image data stream to a second display device.