Liquid Crystal Display Polarization Control Layer Glare Suppression
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Solution Overview
Problem
Liquid crystal display devices face a trade-off between suppressing reflected glare on windshields and maintaining excellent front contrast and visibility, especially when viewed through polarized sunglasses, due to the limitations of existing dichroic substance alignment methods.
Innovation Solution
Incorporating a polarization control layer on the viewing side of the viewing side polarizer or the non-viewing side of the non-viewing side polarizer in a liquid crystal display device configuration, which includes a viewing side polarizer, a liquid crystal cell, and an anisotropic light absorption layer with an absorption axis in the thickness direction, to manage light polarization effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a film in which a dichroic substance is vertically aligned is arranged on the viewing side polarizer side, then reflected glare on windshield is suppressed, but front contrast deteriorates
Solution Approach 1:
The invention divides the optical control function into two separate layers: an anisotropic light absorption layer (with vertically aligned dichroic substance) for suppressing reflected glare, and a polarization control layer for maintaining front contrast and visibility. This segmentation allows each layer to perform its specific function without interfering with the other, resolving the trade-off between glare suppression and contrast maintenance.
Solution Approach 2:
The polarization control layer acts as an intermediary between the viewing side polarizer and the anisotropic light absorption layer. It controls the polarization state of light before it reaches the absorption layer, enabling the system to simultaneously achieve glare suppression and maintain excellent front contrast and visibility through polarized sunglasses.
2Object-affected harmful factors
If a film in which a dichroic substance is vertically aligned is arranged on the viewing side polarizer side, then reflected glare on windshield is suppressed, but visibility through polarized sunglasses deteriorates
Solution Approach 1:
The invention separates the glare suppression function (handled by the anisotropic light absorption layer) from the visibility function (handled by the polarization control layer and viewing side polarizer). This allows the system to suppress reflected glare while maintaining excellent visibility for users wearing polarized sunglasses.
Solution Approach 2:
The polarization control layer serves as a mediator that optimizes the polarization state of light to ensure compatibility with polarized sunglasses. By positioning this layer between the viewing side polarizer and the anisotropic light absorption layer, the system achieves both glare suppression and excellent visibility through polarized sunglasses.
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 configuration effectively suppresses reflected glare on windshields, enhances front contrast, and ensures excellent visibility through polarized sunglasses by optimizing light polarization and absorption.
Implementation Method 1
anisotropic light absorption layer having an absorption axis in a thickness direction
Implementation Method 2
the polarization control layer rotates linearly polarized light vertically incident into a plane of the polarization control layer by 80° to 100°
Data Source
AI summary
The present invention is to provide a liquid crystal display device which is capable of suppressing reflected glare of a display screen on a windshield and the like, has excellent front contrast, and has excellent visibility of a display screen as viewed via polarized sunglasses. A liquid crystal display device includes, in order from a viewing side, a viewing side polarizer, a liquid crystal cell, a non-viewing side polarizer, and an anisotropic light absorption layer having an absorption axis in a thickness direction. The liquid crystal display device further includes at least one polarization control layer, in which the polarization control layer is arranged on a viewing side of the viewing side polarizer or on a non-viewing side of the non-viewing side polarizer.