Polarizing Plate Depolarization Region for Camera Image Quality
Solution Overview
Problem
Conventional polarizing plates with depolarization regions struggle to achieve sharp images with good color tone and brightness while preventing image deformation, especially when used in camera functions of optical displays.
Innovation Solution
A polarizing plate with a depolarization region that has a maximum absorbance of 0.5 to 1.5 in the wavelength range of 380 nm to 420 nm and a light transmittance ratio of 1 to 2, formed by controlling ion concentrations and using femtosecond laser treatment to align iodine and dichroic dyes in the polarizer, ensuring high transmittance without image deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light transmittance of the depolarization region is improved, then the visibility in camera region is improved, but the color tone and definition of photographed image deteriorate and image deformation occurs
Solution Approach 1:
The patent applies local quality by creating a depolarization region with specific optical properties (maximum absorbance of 0.5 to 1.5 in 380-420 nm wavelength range and light transmittance ratio of 1 to 2) that differs from the polarization region. This localized modification allows the depolarization region to provide high light transmittance for camera visibility while maintaining proper color tone and preventing image deformation through controlled absorbance characteristics.
Solution Approach 2:
The patent employs parameter changes by precisely controlling the absorbance and light transmittance ratio parameters of the depolarization region. By setting the maximum absorbance in the 380-420 nm range to 0.5-1.5 and the light transmittance ratio at 590 nm to 400 nm between 1 to 2, the patent optimizes both visibility and image quality, resolving the contradiction between transmittance improvement and image quality maintenance.
2Illumination intensity
If a depolarization region is formed to improve camera visibility, then light transmittance is improved, but image deformation occurs
Solution Approach 1:
The patent creates a localized depolarization region with distinct optical properties from the surrounding polarization region. This local modification allows high light transmittance for improved camera visibility while the controlled absorbance characteristics prevent image deformation, thus maintaining image stability without sacrificing visibility.
Solution Approach 2:
The patent stabilizes image quality by controlling specific parameters of the depolarization region: maximum absorbance of 0.5 to 1.5 in the 380-420 nm wavelength range and light transmittance ratio of 1 to 2. These parameter controls ensure that while light transmittance is improved for visibility, image deformation is prevented through balanced optical properties.
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 solution enables a polarizing plate that significantly improves camera performance by allowing sharp images with good color tone and brightness without image deformation, suitable for applications including infrared sensors.
Implementation Method 1
the depolarization region has a maximum absorbance of 0.5 to 1.5 in the wavelength range of 380 nm to 420 nm
Implementation Method 2
a light transmittance ratio (ratio of light transmittance at a wavelength of 590 nm to light transmittance at a wavelength of 400 nm) of 1 to 2
Implementation Method 3
formed by controlling ion concentrations and using femtosecond laser treatment to align iodine and dichroic dyes in the polarizer
Data Source
AI summary
A polarizing plate and a display apparatus including the same. The polarizing plate includes: a polarizer and a protective film stacked at least on one surface of the polarizer, wherein the polarizing plate includes at least a depolarization region in an in-plane direction thereof, and the depolarization region has a maximum absorbance of 0.5 to 1.5 in the wavelength range of 380 nm to 420 nm and a light transmittance ratio (ratio of light transmittance at a wavelength of 590 nm to light transmittance at a wavelength of 400 nm) of 1 to 2.