Display Response Evaluation Using Dynamic Luminance Graph Comparison
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for evaluating the response speed of displays, particularly when displaying dynamic images, are limited as they rely on measuring response time which varies based on display characteristics and are not effective when input grayscale is changed during the response time.
Innovation Solution
A response speed evaluation system that includes a display device, a luminance measurer, and a response speed evaluator to measure and compare luminance graphs of static and dynamic images, normalizing them to evaluate response speed using similarity indices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If response time measurement method is used to evaluate display performance, then evaluation can be performed for static images, but the method becomes ineffective when input grayscale is changed during response time
Solution Approach 1:
The patent transitions from static response time measurement to dynamic response speed evaluation by continuously comparing luminance graphs of static and dynamic images over time. The system adapts to changing grayscale inputs by measuring luminance transitions in real-time video sequences rather than assuming fixed response conditions.
Solution Approach 2:
The patent changes the measurement parameter from fixed response time to variable response speed characterized by similarity indices. By measuring luminance values at multiple time points and calculating similarity between static and dynamic luminance graphs, the system accommodates varying grayscale conditions and provides continuous response speed evaluation.
2Ease of operation
If traditional response time measurement is performed, then simple measurement process is maintained, but reliable evaluation for dynamic images cannot be achieved
Solution Approach 1:
The patent introduces luminance graphs as an intermediary representation between the display output and the evaluation metric. By converting both static and dynamic image luminance data into comparable graph formats and calculating similarity indices, the system maintains operational simplicity while achieving reliable dynamic image evaluation through standardized comparison procedures.
Data Source
AI summary
A response speed evaluation system for a display device includes the display device configured to display a dynamic video, and to display a static image generated based on input grayscales of the dynamic video, a luminance measurer configured to measure a luminance of the static images, to measure a luminance of the dynamic video, to generate static image graphs based on the luminance of the static images, and to generate a dynamic video graph based on the luminance of the dynamic video, and a response speed evaluator configured to generate an input graph based on the static image graphs, to generate an output graph based on the dynamic video graph, and to compare the input graph and the output graph to evaluate a response speed of the display device.