Liquid Crystal Display Polarizer Angle Configuration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal display panels using the IPS method face challenges in setting the absorption axis of the polarizer to arbitrary directions, leading to issues when viewers wear polarization sunglasses, particularly due to limited inclination of the polarizer axis relative to the pixel electrode's linear portions.
Innovation Solution
The liquid crystal display device is designed with specific configurations where the linear portions of the pixel electrodes and video/scanning lines are inclined, allowing the absorption axis of the polarizer to be set within a range that avoids interference with polarization sunglasses, by adjusting the angles between the polarizer axes, alignment film axes, and electrode orientations to satisfy specific angle relationships across all sub-pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the absorption axis of the polarizer is set orthogonal to the linear portions of the pixel electrode, then the liquid crystal display can achieve proper image display, but the image becomes obscure when viewers wear polarization sunglasses
Solution Approach 1:
The patent applies asymmetry by setting the absorption axis of the polarizer at an angle (10° to 80°) relative to the linear portions of the pixel electrode, rather than at the conventional orthogonal (90°) angle. This asymmetric angular configuration resolves the conflict between standard image display requirements and compatibility with polarization sunglasses, allowing viewers to see the image clearly while wearing such sunglasses.
2Adaptability or versatility
If the absorption axis of the polarizer is set at an angle away from orthogonal to the linear portions of the pixel electrode, then compatibility with polarization sunglasses is improved, but the viewing angle characteristics may be affected
Solution Approach 1:
The patent applies parameter changes by systematically adjusting the angular parameter of the polarizer absorption axis within the range of 10° to 80° relative to the linear portions of the pixel electrode. This parameter optimization allows the display to maintain good viewing angle characteristics while achieving compatibility with polarization sunglasses, resolving the contradiction between adaptability and stability.
3Object-affected harmful factors
If the polarizer absorption axis is oriented at specific angles to accommodate polarization sunglasses, then image visibility for sunglasses wearers is improved, but the device complexity increases due to precise angle configuration requirements
Solution Approach 1:
The patent resolves the complexity issue by establishing clear parameter ranges (10° to 80°) for the polarizer absorption axis angle, which simplifies the configuration process. Within this range, the display achieves compatibility with polarization sunglasses while maintaining manageable manufacturing and configuration complexity through standardized angular specifications.
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 enables the absorption axis of the polarizer to be set arbitrarily, preventing image obscurity even when viewers wear polarization sunglasses, by ensuring the polarizer axis can be oriented effectively to minimize darkening effects.
Implementation Method 1
the liquid crystal display panel is configured to drive the liquid crystal by generating an electric field using the difference in potential between the first electrode and the second electrode
Implementation Method 2
positive liquid crystal sandwiched between the first substrate and the second substrate
Implementation Method 3
a first polarizer arranged on a surface thereof opposite to the liquid crystal, while the second substrate includes a second alignment film arranged on a liquid-crystal-side surface thereof and a second polarizer arranged on a surface thereof opposite to the liquid crystal
Implementation Method 4
the absorption axis of the second polarizer is set to an angle which satisfies a relationship with respect to an extension direction of the linear portions of the first electrode
Data Source
AI summary
An absorption axis of a polarizer on a viewer's side is set to an arbitrary direction to cope with problems attributed to polarization sunglasses or the like. Video lines extend in a reference direction as a whole while being bent locally. Assuming a narrow-side angle out of intersection angles between the reference direction and the extension direction of a portion of the video line as θ1, assuming a narrow-side angle out of intersection angles between the reference direction and the extension direction of the linear portions of the first electrode as θ2, assuming a narrow-side angle out of intersection angles between the reference direction and an alignment axis of the second alignment film as θ3, assuming a narrow-side angle out of intersection angles between the reference direction and an absorption axis of the second polarizer as θ4, and in measuring the angles θ1, θ2, η3 and θ4 within a range from −90° to +90° from the reference direction while setting a clockwise direction as a normal direction, all of a sign of the angle θ1, a sign of the angle θ2 and a sign of the angle θ3 are equal in one sub pixel, the angles θ1 of all sub pixels have the same sign, and the formulae (1) 10°≦|θ1|≦|θ3| and 10°≦|θ2|≦θ3|; (2) 0°≦|θ3−θ2|≦20°; (3) 0°≦|θ1−θ2|≦2°; (4) 10°≦|θ3|≦80°; and (5) 0°≦|θ3−θ4|≦2° or 88°≦|θ3−θ4|≦92° are satisfied in all sub pixels.