LCD Panel Optical Property Testing Through Spectrum Simulation
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Solution Overview
Problem
The existing method for measuring optical properties of liquid crystal display panels is inefficient and error-prone due to the need for transporting liquid crystal cells to backlight panel manufacturers for assembly and measurement, leading to time-consuming and labor-intensive processes.
Innovation Solution
An optical property detecting method that calculates optical parameters using a simulation calculation model, utilizing the spectra of both the liquid crystal module and backlight panel, without requiring physical transport, by establishing a relationship between tristimulus values and chrominance coordinates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the liquid crystal cell is transported to the backlight panel manufacturer for assembly and measurement, then the measurement accuracy is improved, but the detection time and labor cost increase significantly
Solution Approach 1:
The patent creates a virtual copy of the measurement system by establishing a spectral database of the backlight panel. Instead of physically transporting the liquid crystal cell to the backlight panel manufacturer, the patent uses spectral copying and calculation to simulate the optical property measurements that would occur with the actual backlight panel combination, thereby maintaining measurement accuracy while eliminating transport time.
Solution Approach 2:
The patent performs preliminary actions by pre-measuring and storing the spectral characteristics of the backlight panel in a database before the liquid crystal cell is ready for measurement. This preliminary spectral data is then used in conjunction with the liquid crystal cell's transmission spectrum to calculate the optical properties, eliminating the need for wait time during the measurement process.
2Measurement precision
If the liquid crystal cell is transported to the backlight panel manufacturer for assembly and measurement, then the measurement accuracy is improved, but the labor cost and process complexity increase
Solution Approach 1:
The patent replaces the complex physical assembly process with a simplified spectral calculation process. By copying the backlight panel's spectral characteristics into a database and using mathematical calculations to simulate the optical properties of the combined system, the patent eliminates the need for physical assembly, transport, and handling, thereby reducing process complexity while maintaining measurement accuracy.
Solution Approach 2:
The patent substitutes the mechanical system of physical transport, assembly, and handling with an optical-mathematical system. Instead of mechanically assembling the liquid crystal cell with the backlight panel and measuring the physical combination, the patent uses spectral measurements and mathematical calculations to determine the optical properties, thereby simplifying the detection process.
3Ease of operation
If a temporary liquid crystal module is assembled using the backlight panel and liquid crystal cell produced by itself, then the detection process is simplified, but the measurement error increases significantly
Solution Approach 1:
The patent uses spectral copying to capture the exact characteristics of the backlight panel in a database. This spectral copy allows for accurate calculation of the optical properties without the need for physical assembly with a temporary backlight panel, thereby maintaining measurement accuracy while keeping the detection process simple.
Solution Approach 2:
The patent introduces a spectral database as an intermediary between the liquid crystal cell and the actual backlight panel. This intermediary contains the spectral characteristics needed to calculate optical properties, allowing the measurement process to proceed without physical assembly while maintaining accuracy by using the intermediary spectral data rather than a temporary replacement component.
Data Source
AI summary
An optical property detecting method of a liquid crystal display panel is provided, and includes: measuring a spectrum of a first backlight panel and a spectrum of the a liquid crystal module; calculating a transmission spectrum of a target liquid crystal display panel; obtaining a spectrum of a second backlight panel; calculating and obtaining a tristimulus value of a second liquid crystal module; obtaining a plurality of optical parameters corresponding to the target liquid crystal display panel according to the tristimulus value, so as to detect an optical property of the target liquid crystal display panel.