Segmented Polarizer for Transparent Display Transmittance
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Solution Overview
Problem
Transparent displays face significant transmittance loss and image quality degradation due to incomplete polarization rotation and light absorption in background reflection, affecting the visibility of both image and background.
Innovation Solution
A polarizer design with alternating polarization and transmittance regions, where polarization regions transmit linearly polarized light and transmittance regions allow natural light passage, is integrated into a transparent display structure, ensuring selective light transmission and minimizing light absorption in transparent regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional polarizer is used in transparent display, then the display regions can show image pictures, but the transmittance of light reflected by background objects is seriously lost
Solution Approach 1:
The polarizer is divided into multiple regions: polarization regions that transmit linearly polarized light and transmittance regions that transmit natural light. This segmentation allows different areas of the polarizer to perform different functions, enabling the transparent display to show images while maintaining high transmittance for background visibility.
Solution Approach 2:
Different regions of the polarizer have different optical properties. The polarization regions are designed to rotate polarization state for image display, while the transmittance regions are optimized to minimize light absorption and maintain high transmittance for background objects. This local differentiation resolves the contradiction between image display and background visibility.
2Reliability
If the lower polarizer absorbs light reflected by background objects, then the polarization function is achieved, but the brightness and image quality of background objects are severely influenced
Solution Approach 1:
The polarizer is segmented into polarization regions and transmittance regions. The polarization regions maintain the necessary polarization function for image display, while the transmittance regions are designed to minimize light absorption, thereby preserving the brightness and image quality of background objects.
Solution Approach 2:
The transmittance regions are specifically designed with optical properties that minimize light absorption and maximize transmittance. This local optimization ensures that background objects maintain high brightness and image quality while the polarization regions continue to perform the polarization function reliably.
3Device complexity
If the liquid crystal layer does not completely rotate 90° polarization state, then the display function is simplified, but light is filtered again by the upper polarizer causing transmittance loss
Solution Approach 1:
The upper polarizer is segmented into polarization regions and transmittance regions. The transmittance regions allow light that has not been fully rotated by the liquid crystal layer to pass through without being filtered, thereby reducing transmittance loss while the polarization regions continue to perform the necessary polarization function.
Solution Approach 2:
The transmittance regions are designed to minimize light filtering and absorption, allowing light with incomplete polarization rotation to pass through. This local optimization reduces the impact of incomplete liquid crystal rotation on overall transmittance while maintaining the polarization function where needed.
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 design enhances light transmittance and image quality by preventing unnecessary light filtering, allowing for higher brightness and clearer background images in transparent displays.
Implementation Method 1
the polarization regions are employed to transmit through linear polarization light in a polarization axis of the polarization regions
Implementation Method 2
the transmittance regions are employed to transmit through natural light
Data Source
AI summary
The present invention discloses a polarizer, comprising a first protective layer, a polarization layer and a second protective layer, which are sequentially stacked up in a first direction, and the polarization layer comprises a plurality of polarization regions and a plurality of transmittance regions, and the plurality of polarization regions and the plurality of transmittance regions are alternately aligned on a plane perpendicular to the first direction, and the polarization regions are employed to transmit through linear polarization light in a polarization axis of the polarization regions, and the transmittance regions are employed to transmit through natural light. The polarizer of the present invention can selectively transmit the natural light to raise the transmittance of the display utilizing the polarizer. The present invention also discloses a transparent display with high transmittance.