Partial-Region Flicker Measurement via Sequential Imaging
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Solution Overview
Problem
Existing two-dimensional imaging devices have low frame rates, limiting their ability to measure flicker amounts accurately across multiple regions on a display screen, as they require high sampling frequencies which are not typically supported by standard devices.
Innovation Solution
A two-dimensional flicker measurement device that includes a two-dimensional imaging device with a partial reading function, a setting unit, and a calculation unit, allowing for high-frame-rate imaging by dividing the imaging region into partial regions, enabling accurate flicker measurement across multiple regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a standard two-dimensional imaging device is used, then device complexity is reduced, but measurement precision deteriorates due to low frame rate
Solution Approach 1:
The imaging region is divided into multiple partial regions, and the frame is divided into multiple fields corresponding to these partial regions. Each field is read out sequentially at a higher frame rate, enabling accurate flicker measurement without requiring a high-speed camera.
Solution Approach 2:
The patent introduces a temporal dimension by dividing the frame into multiple fields read out at different times. This allows the system to achieve high effective sampling rates for flicker measurement while using a standard imaging device with lower overall frame rates.
2Measurement precision
If the frame rate is increased to improve measurement precision, then measurement precision improves, but use of energy increases and device complexity increases
Solution Approach 1:
Instead of increasing the overall frame rate of the entire image, the patent segments the imaging region into partial regions and reads them sequentially. This maintains lower overall energy consumption while achieving high effective sampling rates for flicker measurement in each partial region.
3Measurement precision
If the frame rate is increased to improve measurement precision, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent uses the existing partial reading function of standard two-dimensional imaging devices to divide the imaging region into multiple partial regions. This approach leverages built-in device capabilities rather than adding complex external hardware, thus improving measurement precision without significantly increasing device complexity.
Solution Approach 2:
The imaging device's own partial reading function is utilized to achieve high-frame-rate imaging. The device serves itself by using its inherent capability to read different regions at different times, eliminating the need for additional high-speed imaging hardware.
4Productivity
If multiple measurement regions are measured simultaneously, then productivity improves, but measurement precision deteriorates due to low sampling frequency
Solution Approach 1:
The imaging region is segmented into multiple partial regions that can be read out sequentially at high frame rates. This allows multiple measurement regions to be covered while maintaining high sampling frequencies for flicker measurement in each region, thus preserving both productivity and measurement precision.
Solution Approach 2:
By introducing temporal segmentation through field division, the patent enables simultaneous coverage of multiple spatial regions while maintaining high sampling rates. The sequential reading of different fields creates an effective high sampling frequency for flicker analysis across all measurement regions.
Data Source
AI summary
A two-dimensional flicker measurement device includes: a two-dimensional imaging device having a partial reading function for reading a part of an imaging region; a setting unit that sets a plurality of parts, which correspond to partial regions each of which includes two or more of measurement regions, in the imaging region; a control unit that acquires a photometric quantity of each of the plurality of partial regions corresponding to the plurality of parts by causing the two-dimensional imaging device to image the measurement target multiple times using the partial reading function with the number of set parts as the number of times of imaging; and a calculation unit that executes processing, which is for calculating flicker amounts of the two or more measurement regions included in the partial region based on the acquired photometric quantity of the partial region, for each of the plurality of partial regions.