Polarizer Adhesive Layer Particles for Wider Display Viewing Angles
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Solution Overview
Problem
Existing display devices experience deviations in display color and other aspects as the viewing display angle increases due to polarizers, necessitating improvements in display quality at different viewing angles.
Innovation Solution
A polarizer is designed with a polarizing layer, protective layers, and an adhesive layer containing adjusting particles with specific cross-sectional ratios, dispersed to enhance color viewing angle and contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional polarizer is used, then the display device can achieve basic polarization function, but the display color deviates as the viewing angle increases
Solution Approach 1:
The patent introduces adjusting particles with specific aspect ratios (first type: 5-50, second type: 1-5) dispersed in the adhesive layer between the polarizing layer and protective layer. These particles have different shapes and sizes that locally modify the optical properties of the adhesive layer, enabling differential light modulation at different viewing angles while maintaining the overall polarization function.
Solution Approach 2:
The patent creates a composite adhesive layer by dispersing adjusting particles (comprising first type and/or second type particles with specific dimensional ratios) within the adhesive material. This composite structure combines the adhesive's bonding function with the particles' optical modulation capabilities, achieving both structural integrity and improved viewing angle performance.
2Ease of manufacture
If the polarizer structure is simplified, then the manufacturing process is easier, but the display quality at different viewing angles deteriorates
Solution Approach 1:
The patent specifies precise parameter ranges for the adjusting particles: first type particles have a major axis to inscribed circle diameter ratio of 5-50, and second type particles have a ratio of 1-5. By controlling these dimensional parameters within specific ranges, the patent achieves improved viewing angle performance while maintaining compatibility with conventional manufacturing processes.
Solution Approach 2:
The patent uses naturally occurring or easily manufacturable particle shapes that can be obtained through standard dispersion processes. Rather than requiring complex precision manufacturing, the patent leverages the inherent optical properties of particles with specific aspect ratios that can be produced through conventional mixing and coating techniques.
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 polarizer improves display quality by reducing angle-dependent color deviations and enhancing contrast through the strategic dispersion of adjusting particles in the adhesive layer.
Implementation Method 1
adjusting particles dispersed in the adhesive layer... improving display quality by reducing angle-dependent color deviations and enhancing contrast
Data Source
AI summary
The disclosure provides a polarizer and a display device. The polarizer includes a polarizing layer, a first protective layer, an adhesive layer between the polarizing layer and the first protective layer, and adjusting particles dispersed in the adhesive layer; the adjusting particles include first type of adjusting particles, second type of adjusting particles, or both of them, a length-diameter ratio of the first type of adjusting particles is greater than or equal to 5 and less than or equal to 50, and a length-diameter ratio of the second type of adjusting particles is greater than or equal to 1 and less than 5.