Visual Display View Angle Performance Measurement
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Solution Overview
Problem
Conventional methods for measuring the spatial and angular performance of flat panel video displays are too slow and impractical for production applications, as they require numerous spot measurements and assume uniform brightness and color across the display, which is often not the case.
Innovation Solution
A system and method using a camera and a goniometer to capture image measurements from a visual display at various view angles, calculating tristimulus values, and generating view angle performance charts, allowing for efficient measurement of spatial and angular performance without moving the imaging device, enabling accurate characterization of non-uniform displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If spot measurements are taken at multiple locations to measure view angle performance, then measurement accuracy is improved, but measurement time increases significantly
Solution Approach 1:
The patent transitions from one-dimensional spot measurements to two-dimensional imaging measurements. By capturing the entire display surface with a camera and processing the images to extract luminance and color data at multiple locations simultaneously, the system achieves comprehensive spatial coverage without the time penalty of sequential spot measurements. The image processing algorithm identifies display regions and extracts measurement data from multiple points in parallel from each captured image.
Solution Approach 2:
The patent combines multiple measurement functions into a single imaging system. The camera captures spatial information across the entire display surface in one shot, merging what would otherwise require multiple separate spot measurements at different locations and angles. This consolidation allows simultaneous acquisition of data from multiple spatial positions and view angles, dramatically reducing total measurement time while maintaining comprehensive coverage.
2Measurement precision
If thousands of locations are measured with high spatial resolution, then measurement precision is improved, but productivity decreases due to enormous time requirements
Solution Approach 1:
The patent implements continuous imaging and processing to measure the entire display surface without interruption. Instead of stopping to record each spot measurement, the system continuously captures images and processes them in real-time to extract measurement data from thousands of locations. This continuous operation maintains high spatial resolution across the full display area while maximizing productivity through uninterrupted data acquisition and parallel processing.
Solution Approach 2:
The patent replaces the mechanical spot measurement system with an optical imaging system. Instead of physically moving a spot meter to each location, the system uses a camera to optically capture the entire display surface at once. This substitution eliminates the time-consuming mechanical positioning required for spot measurements while maintaining or improving spatial resolution through digital image processing techniques.
3Adaptability or versatility
If the display is rotated or moved to measure view angle performance, then angular measurement capability is improved, but measurement complexity and time increase
Solution Approach 1:
The patent inverts the traditional approach by keeping the camera stationary and rotating the display instead. Rather than moving the measurement device to different angles, the display is rotated to present different angular views to the fixed camera. This inversion simplifies the measurement system by eliminating the need for a complex movable camera platform while still achieving comprehensive angular measurement coverage through display rotation.
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
This approach significantly improves the speed and accuracy of measuring view angle performance by allowing complete spatial and angular characterizations of visual displays, providing detailed performance data at multiple angles without the need for manual repositioning of the measurement device.
Implementation Method 1
capturing a plurality of image measurements from the visual display at a plurality of different view angles
Data Source
AI summary
Systems and methods for measuring spatial and angular performance of a visual display are disclosed herein. In one particular embodiment, for example, a method for measuring spatial and angular performance of a flat panel visual display includes capturing a plurality of image measurements from a visual display at a plurality of different view angles. The method also includes selecting one or more points of interest on the visual display, and calculating tristimulus values (X, Y, Z) for each point of interest at each of the plurality of view angles. The method further includes generating a view angle performance plot for the one or more selected points of interest.