Display Compensation Testing With Delta Threshold Validation
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Solution Overview
Problem
Existing methods for compensating display devices for brightness and color uniformity are inaccurate due to errors from external factors such as camera malfunctions and static electricity, leading to miscompensation.
Innovation Solution
A method and system for testing compensation operations by providing test data to a display device, capturing images, generating compensation data based on luminance and color coordinates, and comparing delta values with threshold values to determine if the compensation is accurate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mura-compensation algorithm operation or multi-time programming operation is performed to improve brightness uniformity, then brightness uniformity is improved, but measurement precision deteriorates due to camera errors, static electricity, and foreign matter
Solution Approach 1:
The patent applies preliminary action by performing a test compensation operation before the actual compensation. The method includes: (1) providing test data to the display device, (2) capturing the displayed image, (3) generating test compensation data based on luminance and color coordinates, (4) applying the test compensation data, and (5) determining whether to perform actual compensation based on the test results. This preliminary test allows the system to verify compensation accuracy before committing to the actual compensation process.
Solution Approach 2:
The patent implements feedback by using the captured image data to calculate luminance and color coordinates, then using these calculations to generate compensation data. The system continuously monitors the display device's performance through image capture and adjusts compensation parameters based on the measured deviations. The test compensation results feed back into the decision-making process for whether to proceed with actual compensation.
2Manufacturing precision
If compensation operation is performed based on captured image data, then brightness and color coordinates are compensated, but reliability deteriorates due to external factors such as camera errors, static electricity, and foreign matter
Solution Approach 1:
The patent applies preliminary action by performing a test compensation operation before the actual compensation. The method includes: (1) providing test data to the display device, (2) capturing the displayed image, (3) generating test compensation data based on luminance and color coordinates, (4) applying the test compensation data, and (5) determining whether to perform actual compensation based on the test results. This preliminary test allows the system to verify compensation accuracy before committing to the actual compensation process.
Solution Approach 2:
The patent applies beforehand cushioning by introducing a test compensation stage that acts as a buffer or cushion between image capture and actual compensation. If the test compensation reveals issues due to external factors (camera errors, static electricity, foreign matter), the system can abort the actual compensation, preventing unreliable compensation data from being applied to the display device.
3Measurement precision
If delta value comparison with threshold value is performed to test miscompensation, then compensation accuracy is verified, but device complexity increases due to additional testing equipment and procedures
Solution Approach 1:
The patent applies universality by designing a test system that uses the display device's existing display function for testing purposes. The same display device that is to be compensated is also used to display test patterns and receive test data. The image capture function serves dual purposes: capturing normal display content and capturing test patterns for compensation verification. This multi-functionality reduces the need for separate dedicated test equipment.
Solution Approach 2:
The patent applies self-service by having the display device test itself through the compensation process. The display device displays test data, the captured image is analyzed to generate compensation data, and the compensation data is applied back to the same display device. The system uses its own resources (display capability, image capture capability) to perform the verification, reducing dependency on external complex testing equipment.
Data Source
AI summary
A method of testing a compensation operation for a display device includes providing test data including red test data, green test data, and blue test data to the display device, capturing an image displayed by the display device based on the test data, generating red compensation data which is compensation data for the red test data, green compensation data which is compensation data for the green test data, and blue compensation data which is compensation data for the blue test data based on a luminance and a color coordinates of the captured image, and comparing a delta value, calculated based on red test data to which the red compensation data is applied, green test data to which the green compensation data is applied, and blue test data to which the blue compensation data is applied, with a threshold value to test whether the compensation operation is a miscompensation.