Quantum Dot Backlight Chromaticity Correction via Reference Polarizer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The secondary excitation of quantum dots in quantum dot backlight modules causes spectral changes, leading to inaccurate chromaticity calculations due to the placement of the first polarizer on the light exit side, which deviates the measured spectrum from the intended color gamut, making it difficult to achieve precise color resistance in display designs.
Innovation Solution
A colorimetry calculation method that uses a reference polarizer to correct the spectrum by measuring and calculating a correction spectrum, allowing for accurate simulation and correction of chromaticity offsets, thereby improving the accuracy of chromaticity calculations and providing a basis for quantization design in displays with quantum dot backlight modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the first polarizer is placed on the light exit side of the quantum dot backlight module, then the display structure is simplified and light utilization is improved, but secondary excitation of quantum dots occurs causing spectral changes and chromaticity calculation inaccuracies
Solution Approach 1:
The patent applies preliminary action by measuring the quantum dot backlight module spectrum with a reference polarizer before final chromaticity calculation, and pre-calculating the correction spectrum to compensate for secondary excitation effects that will occur during actual display operation
Solution Approach 2:
The patent introduces a reference polarizer as an intermediary measurement tool that does not cause secondary excitation, allowing accurate baseline spectrum measurement. This reference measurement serves as a mediator to calculate the correction spectrum that compensates for the effects of the first polarizer
2Ease of manufacture
If the quantum dot film is placed on the light exit side of the light guide plate, then the backlight module structure is optimized, but the first polarizer causes secondary excitation of quantum dots leading to spectrum deviation from design requirements
Solution Approach 1:
The patent applies feedback by using the reference polarizer measurement results to calculate a correction spectrum, which is then fed back into the chromaticity calculation process to compensate for the spectral deviations caused by the first polarizer's secondary excitation effect
Solution Approach 2:
The reference polarizer acts as an intermediary that enables accurate measurement without causing secondary excitation, providing a baseline spectrum that mediates between the actual display structure and the ideal spectral requirements
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
The method effectively corrects the chromaticity offset caused by secondary excitation, enhancing the accuracy of colorimetry calculations and enabling precise quantization design for quantum dot backlight modules, ensuring true color representation and improved color gamut in displays.
Implementation Method 1
the blue LED is encapsulated on the light entrance side of the light guide plate, and the quantum dot film is usually placed on the light exit side of the light guide plate. When the quantum dot backlight module is in operation, the light source emitted by the blue LED through the lower polarizer containing the advanced protein crystallization facility (APCF) below the liquid crystal cell structure will be re-through the quantum dot film, which leads to the secondary excitation problem of the quantum dots
Data Source
AI summary
The present disclosure discloses a colorimetry calculation method for a display. The display includes a quantum dot backlight module (10) and a first polarizer (20), wherein the quantum dot backlight module (10) includes a light guide plate (11), a quantum dot thin film layer (12), and a backlight (13). The method obtains the correction spectrum of the quantum dot backlight module (10), and obtains the true spectrum of the quantum dot backlight module (10) when the first polarizer (20) is arranged on a light exit side of the quantum dot backlight module (10) based on the correction spectrum and the measurement spectrum, that is, the modified spectrum, so as to accurately simulate the chromatic offset phenomenon due to the secondary excitation of the first polarizer (20), and provide the basis for the quantitative design of the display including the quantum dot backlight module (10).