Polarizing Plate Camera Region With High Light Transmittance
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Solution Overview
Problem
Polarizing plates in optical displays, particularly in smartphones, limit image quality and clarity due to low light transmittance, especially in camera regions, which affects visibility and color quality during photography.
Innovation Solution
A polarizing plate with a high light transmittance region having a depolarization index of 2% or less at 550 nm, allowing improved image clarity and color quality by forming a high light transmittance region on the camera area of the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polarizing plate is used to emit polarized light through polarization of light emitted from a liquid crystal panel, then the polarization function is achieved, but the light transmittance is reduced to less than 50% causing deterioration in visibility
Solution Approach 1:
The polarizing plate is divided into two distinct regions: a first region that maintains the polarization function with standard light transmittance characteristics, and a second region (camera region) that is optimized for high light transmittance without requiring polarization functionality. This segmentation allows each region to be optimized for its specific function, resolving the contradiction between polarization performance and light transmittance.
Solution Approach 2:
Different regions of the polarizing plate are assigned different optical properties: the first region has polarization characteristics with standard light transmittance, while the second region (camera area) has enhanced light transmittance properties. This local differentiation allows the camera region to capture images with improved visibility and color quality while the display region maintains proper polarization functionality.
2Illumination intensity
If a high light transmittance region is formed at the camera area, then visibility is improved, but color quality and clarity of photographed images are limited
Solution Approach 1:
The optical parameters of the second region (camera area) are specifically controlled to maintain a depolarization index of 2% or less while achieving high light transmittance. By precisely controlling the depolarization parameter, the patent enables both high visibility and excellent color quality/clarity in photographed images, resolving the contradiction between light transmittance and image quality.
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 polarizing plate enhances image clarity and color quality during photography by maintaining a depolarization index of 2% or less, ensuring clear and vibrant images through the high light transmittance region.
Implementation Method 1
A polarizing plate serves to emit polarized light through polarization of light emitted from a liquid crystal panel of an optical display
Implementation Method 2
the high light transmittance region having a depolarization index of about 2% or less at a wavelength of about 550 nm
Data Source
AI summary
Provided are a polarizing plate and an optical display device including same, the polarizing plate comprising a polarizer and a protection film formed on at least one surface of the polarizer, wherein the polarizer includes, in at least a part thereof, an area having high light transmittance, and the area having the high light transmittance has a depolarization index that is less than or equal to approximately 2% in a wavelength of approximately 550 nm.