Image Display System Luminance Transition Control
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Solution Overview
Problem
Image display systems experience a time lag when changing luminance settings, leading to a deviation from desired gradation characteristics, which impairs usability as the image displayed based on previous gradation characteristics lags behind the desired GSDF characteristic.
Innovation Solution
The system simultaneously switches the luminance setting value and gradation characteristic of image data, using a first gradation characteristic associated with an estimated target luminance and a second gradation characteristic based on actual display luminance, allowing for quicker alignment with the desired GSDF characteristic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the luminance setting value is changed and then the display luminance is measured to acquire target luminance, then the gradation characteristic accuracy is improved, but the response time is worsened due to the sequential operation requiring time lag
Solution Approach 1:
The system performs preliminary action by estimating the target luminance based on the relationship between luminance setting values and display luminances before the actual luminance measurement is completed. This allows the gradation characteristic switching to be prepared in advance, reducing the time lag when the luminance setting value is changed.
Solution Approach 2:
The system dynamically switches between two different operating modes: using estimated target luminance for rapid response and using actually measured target luminance for high accuracy. This dynamic approach allows the system to adapt to different situations, prioritizing speed when quick response is needed while maintaining accuracy when measurement time is available.
2Measurement precision
If the gradation characteristic is switched after measuring display luminance, then the image quality is improved, but the usability is worsened during the time lag period
Solution Approach 1:
The system performs preliminary switching to a first gradation characteristic based on estimated target luminance immediately when a luminance setting value change is detected. This preliminary action ensures that the user sees an improved image quality without waiting for the actual luminance measurement to complete, thereby maintaining usability during the transition period.
Solution Approach 2:
The system dynamically manages two gradation characteristics: a first gradation characteristic based on estimated target luminance for immediate display, and a second gradation characteristic based on actually measured target luminance for final accurate display. This dynamic switching strategy balances image quality improvement with usability by providing progressive enhancement rather than waiting for complete measurement.
3Measurement precision
If the system waits for luminance measurement before switching gradation characteristic, then the accuracy is improved, but the productivity is worsened due to delayed image display
Solution Approach 1:
The system performs preliminary switching to the first gradation characteristic based on estimated target luminance before the actual luminance measurement is completed. This preliminary action enables the image display to proceed without waiting for the measurement, thereby improving image display speed while maintaining a pathway to accurate display through subsequent switching to the second gradation characteristic.
Solution Approach 2:
The system dynamically adjusts the gradation characteristic switching strategy by using estimated target luminance for immediate switching and measured target luminance for final switching. This dynamic approach allows the system to prioritize productivity by displaying images quickly while still achieving accuracy through the two-stage switching mechanism.
Data Source
AI summary
An object of the present invention is to provide the image display system, the image display device, the image display method and the computer program that can enhance usability when changing a luminance setting value.The image processing unit is configured to set a gradation characteristic of the image data to be displayed on the image display unit to a first gradation characteristic and simultaneously switch a luminance setting value from a first luminance setting value to a second luminance setting value when the image display system accepts a request to change the luminance setting value of the image display unit from the first luminance setting value to the second luminance setting value, and then switch the gradation characteristic of the image data to be displayed on the image display unit to a second gradation characteristic.