Liquid Crystal Display Viewing Angle Control and Anti-Condensation Layer
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Solution Overview
Problem
Liquid crystal display devices (LCDs) are vulnerable to heat and moisture, leading to performance degradation in high temperature and high humidity environments, and can be distracting, posing safety concerns, especially in vehicles.
Innovation Solution
A liquid crystal display device with a viewing angle control unit and an anti-condensation layer coated with a hydrophilic material on the second light guide plate of the second backlight unit, allowing for a security mode with limited viewing angle and a sharing mode with wider viewing angle, while suppressing condensation and enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wide viewing angle is provided for the display, then viewing comfort is improved, but safety is worsened due to potential distraction to surrounding people
Solution Approach 1:
The patent implements a viewing angle control unit that can dynamically switch between a first backlight unit (providing wide viewing angle) and a second backlight unit (providing narrow viewing angle). This dynamic adjustment allows the display to adapt to different usage scenarios, providing wide viewing angle for viewing comfort when needed, and narrow viewing angle for safety when surrounding people might be distracted.
2Adaptability or versatility
If the display operates in high temperature and high humidity environment, then adaptability is improved, but durability is worsened due to condensation and component degradation
Solution Approach 1:
The patent introduces an anti-condensation layer as an intermediary component between the first light guide plate and the second light guide plate. This layer prevents condensation formation in high temperature and high humidity environments, protecting the internal components from moisture damage while allowing the display to operate adaptably in such environmental conditions.
Solution Approach 2:
The anti-condensation layer is installed in advance before the display operates in high temperature and high humidity environments. This preventive measure cushions against potential condensation and moisture damage, ensuring durability is maintained even when the display adapts to challenging environmental conditions.
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 solution effectively limits viewing angles to prevent distractions and improves durability and performance in high temperature and high humidity environments by reducing condensation and maintaining display quality.
Implementation Method 1
an anti-condensation layer coated with a hydrophilic material on a rear surface of the second light guide plate constituting the second backlight unit
Data Source
AI summary
A display device includes a first backlight, a viewing angle control assembly disposed on the first backlight, a second backlight disposed on the viewing angle control assembly, and a display panel disposed on the second backlight. In a security mode, only the first backlight may be operable with the viewing angle control assembly having light blocking areas that limit light transmission to the display panel to within a predetermined range to limit a viewing angle of images displayed on the display panel. In a sharing mode, the second backlight is operated and the viewing angle control assembly does not limit light transmission, thus widening the viewing angle of images on the display panel. The display device may also include an anti-condensation layer on the second backlight to improve durability in high temperature and high humidity environments.