Two-Dimensional Flicker Measurement Using Partial Sensor Readout
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Solution Overview
Problem
Conventional flicker measurement devices, both spot-type and two-dimensional sensors, face challenges in achieving high accuracy and efficiency due to the need for high sampling rates and the expense and noise issues associated with high-speed two-dimensional sensors.
Innovation Solution
A device utilizing multiple two-dimensional sensors with partial readout functions, where only selected photoelectric conversion elements in specific regions are read, allowing for high-speed operation while maintaining measurement accuracy by dividing the imaging region into partial areas and adjusting readout regions based on the measurement target's distance and required resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a two-dimensional sensor is used to measure flicker, then two-dimensional measurement capability is achieved, but the sensor must operate at high frame rates which requires expensive high-speed sensors that introduce noise and reduce measurement accuracy
Solution Approach 1:
The patent divides the imaging region into multiple partial imaging regions and assigns different two-dimensional sensors to each region. Each sensor only needs to read out pixel values from its assigned partial region at high frame rates, rather than the entire imaging region. This segmentation allows the use of standard, lower-cost sensors while achieving high-speed flicker measurement capability across the entire display screen.
Solution Approach 2:
Instead of requiring each sensor to process the complete imaging region at high speed, the patent applies partial action by having each sensor read out only the pixel values from its assigned partial imaging region. This partial readout approach reduces the processing burden on each sensor, enabling the use of standard sensors while maintaining high measurement accuracy through coordinated operation of multiple sensors.
2Measurement precision
If the sampling rate is increased to improve flicker measurement accuracy, then measurement precision improves, but the required frame rate becomes unachievable for general two-dimensional sensors
Solution Approach 1:
The patent segments the imaging region into multiple partial imaging regions, each handled by a separate two-dimensional sensor. This segmentation allows each sensor to operate at high frame rates for its assigned region while using standard sensor hardware. The coordinated operation of multiple sensors achieves the required high sampling rate across the entire imaging region without requiring any single sensor to process the complete region at high speed.
Solution Approach 2:
The patent merges the output data from multiple two-dimensional sensors to achieve comprehensive high-speed flicker measurement across the entire imaging region. By combining the partial measurements from multiple sensors, the system achieves the equivalent of a single high-speed sensor capturing the entire region, thereby maintaining high measurement accuracy while using standard sensor technology.
3Measurement precision
If multiple spot-type devices are used to measure flicker at multiple points, then comprehensive measurement coverage is achieved, but the time and effort required for measurement increases
Solution Approach 1:
The patent merges multiple two-dimensional sensors into a single integrated measurement system that simultaneously captures flicker information across multiple regions of the imaging region. This unified approach allows comprehensive flicker measurement coverage equivalent to using multiple spot-type devices, while achieving all measurements simultaneously in a single operation rather than requiring sequential measurements with multiple devices.
Solution Approach 2:
The patent creates a multi-functional measurement system where multiple two-dimensional sensors work together to perform comprehensive flicker measurement across the entire imaging region. This universal approach enables a single system to replace multiple specialized measurement devices, achieving both comprehensive coverage and efficient simultaneous measurement operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables two-dimensional flicker measurement without deteriorating accuracy, allowing for high-speed operation of sensors and reducing the need for multiple devices, thus improving measurement efficiency and reducing noise.
Implementation Method 1
a plurality of two-dimensional sensors individually including a plurality of photoelectric conversion elements that are two-dimensionally arranged in a row direction and a column direction
Data Source
AI summary
A device for measuring two-dimensional flicker of the present application includes a plurality of two-dimensional sensors having a partial readout function of reading out only a pixel value of some of photoelectric conversion elements included in set partial readout regions, among a plurality of photoelectric conversion elements. In the device for measuring two-dimensional flicker, a plurality of measurement regions are set two-dimensionally on a measurement target object. Each pixel in the plurality of measurement regions is individually acquired, by setting each of the plurality of partial readout regions of the plurality of two-dimensional sensors in each of a plurality of partial imaging regions obtained by dividing an entire imaging region including entirely the measurement target object. A flicker value of the plurality of measurement regions is individually obtained based on each pixel value in the plurality of measurement regions.