Multi-camera filter system for display panel characterization
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Solution Overview
Problem
The existing methods for characterizing display panels, such as OLED or quantum dot displays, require significant time and resources due to the slow calibration process using color measurement instruments like spectrometers, which is inefficient for numerous panels.
Innovation Solution
A multi-camera filter system is employed, using filters with transmittance profiles matching color matching functions in different wavelength ranges to capture images, reducing the need for extensive calibration and processing time by overlapping contributions from wavelengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a spectrometer is used to generate the full spectrum of light for calibration, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The full spectrum measurement task is segmented into multiple wavelength ranges, each captured by a dedicated camera-filter combination. This allows parallel processing of different spectral portions simultaneously, dramatically reducing total calibration time while maintaining comprehensive spectral coverage through the segmented approach.
Solution Approach 2:
Instead of using a single spectrometer to sequentially scan the full spectrum, the system creates multiple copies (cameras) each equipped with filters that replicate specific portions of the spectral response. This parallel copying approach captures the entire spectrum simultaneously, eliminating the sequential time penalty of traditional spectrometry.
2Productivity
If multiple filters covering different wavelength ranges are used, then productivity is improved, but device complexity increases
Solution Approach 1:
Multiple camera-filter systems are designed with universal functionality to capture different wavelength ranges. Each camera-filter combination serves a specific spectral portion but all work together as a unified multi-functional system, allowing simultaneous characterization across the entire visible spectrum through coordinated operation of the multiple units.
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 reduces the time and computing resources required for calibrating display panel components, enabling faster and more efficient characterization of display panels by processing images through multiple filters that replicate color matching functions.
Implementation Method 1
The filters include a first filter having a transmittance profile that that matches a color matching function in a first wavelength range and a second filter having a transmittance profile a transmittance profile that matches the color matching function in a second wavelength range higher than the first wavelength range
Data Source
AI summary
Embodiments relate to determining characteristics of a display panel by using capturing images through multiple filters where the multiple filters include at least two filters that collectively enable replicating of a color matching function. At least two filters of the multiple filters have transmission profiles that correspond to the same color matching function (x color matching function) in different wavelength ranges. Image capturing devices capture the display panel through respective filters. The captured images are processed to the display characteristics of pixels or regions of the display panel.