Liquid Crystal Tilt Angle Variation for Wide Viewing Angles
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Solution Overview
Problem
Liquid crystal displays (LCDs) have limited viewing angles due to the way light passes through the liquid crystal layer and color filter, resulting in deteriorated image quality when viewed from the periphery.
Innovation Solution
A display device design with a first and second substrate and a liquid crystal layer, where the angle of pixels in different areas allows for varied viewing angles, ensuring image quality is maintained across a broader range by adjusting the inclination of imaginary lines relative to the substrate surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If light passes through the liquid crystal layer and color filter in a typical LCD, then the display can operate at low voltage and consume low power, but the viewing angle is limited and image quality deteriorates when viewed from the periphery
Solution Approach 1:
The patent applies local quality by making the liquid crystal layer have different tilt angles in different regions. Specifically, the liquid crystal molecules are tilted at a first angle in a first region and at a second angle (different from the first angle) in a second region. This local variation in tilt angle allows different regions to optimize for different viewing directions, thereby expanding the overall viewing angle while maintaining the low power consumption characteristic of LCDs.
2Adaptability or versatility
If the viewing angle is expanded by varying liquid crystal tilt angles in different regions, then image quality is maintained across a broader range, but the device complexity increases
Solution Approach 1:
The patent segments the liquid crystal layer into multiple regions with different tilt angles. The liquid crystal layer is divided into a first region with a first tilt angle and a second region with a second tilt angle. This segmentation allows each region to be optimized for specific viewing directions, expanding the overall viewing angle. The segmentation is implemented through controlled orientation of liquid crystal molecules in different zones, which can be achieved through standard LCD manufacturing techniques without requiring complex additional components.
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 the viewing area with maintained image quality, preventing deterioration in luminance and color, even when viewed outside the typical viewing angle range, thus providing a broader non-deteriorated viewing area compared to conventional LCDs.
Implementation Method 1
light provided by a backlight assembly in a typical LCD will usually pass through a liquid crystal layer and a color filter to enable images to be displayed using the light passing through the liquid crystal layer and the color filter
Implementation Method 2
light provided by a backlight assembly in a typical LCD will usually pass through a liquid crystal layer and a color filter to enable images to be displayed
Data Source
AI summary
A display device includes a first substrate, a second substrate, and a liquid crystal layer. The first substrate includes pixels, some of the pixels are disposed in a first area and some of the pixels are disposed in a second area. The second substrate is spaced apart from and coupled to the first substrate. The liquid crystal layer is disposed between the first substrate and the second substrate. Each pixel is associated with a viewing angle, an imaginary line extending from a center of the viewing angle, and an angle between a surface of the first substrate and the imaginary line. The angle of a pixel disposed in the first area differs from the angle of a pixel disposed in the second area.