Viewing Angle Control Device with Alternating Polarizing Portions
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Solution Overview
Problem
Current display apparatuses with wide viewing angles pose a risk of confidential information leakage, as they lack convenient and effective anti-peeping mechanisms, requiring manual installation and removal of light control films.
Innovation Solution
A viewing angle control device with alternating polarizing and transmissive portions, having an aspect ratio greater than 1, is integrated into the display apparatus, enhancing light polarizability and reducing energy loss, while the polarizer's transmission axis is perpendicular to the viewing angle control device's, providing a filter effect at large angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light control film is placed in front of the display panel to achieve anti-peeping effect, then confidential information leakage is prevented, but operational convenience deteriorates due to manual installation and removal requirements
Solution Approach 1:
The display panel automatically switches between wide viewing angle mode and anti-peeping mode based on detected ambient light conditions, eliminating the need for manual film installation and removal. The system serves itself by using environmental sensors to trigger appropriate viewing angle control modes.
Solution Approach 2:
The viewing angle control mechanism transitions from a static light control film to a dynamic system that can automatically adjust between different viewing angle states. The display panel's liquid crystal layers can be electrically controlled to change their optical properties in real-time based on ambient conditions.
2Object-affected harmful factors
If a light control film is used to achieve anti-peeping effect, then viewing angle control is improved, but light transmittance deteriorates causing loss of overall brightness
Solution Approach 1:
Instead of using a uniform light control film across the entire display, the invention applies viewing angle control selectively through specific liquid crystal layers that can be activated only when needed. The alternating arrangement of polarizing and transmissive portions creates localized control zones that maintain overall light transmittance while providing anti-peeping functionality where required.
Solution Approach 2:
The display panel uses a composite structure with multiple layers including first and second liquid crystal layers with different viewing angle characteristics, combined with alternating polarizing and transmissive portions. This composite structure allows the system to achieve both wide viewing angle and anti-peeping modes by controlling the orientation and state of different material layers.
3Adaptability or versatility
If wide viewing angle display effect is provided to allow multiple viewers to watch together, then viewer accessibility is improved, but security deteriorates as confidential information becomes easily visible to others
Solution Approach 1:
The display panel dynamically adjusts its viewing angle characteristics based on ambient light detection. In bright environments where peeping risk exists, the system automatically switches to a narrow viewing angle mode that maintains security. In controlled environments, it transitions to wide viewing angle mode for better accessibility, thus adapting security and accessibility needs in real-time.
Solution Approach 2:
The invention changes the optical parameters of the display panel by controlling the alignment and orientation of liquid crystal molecules in different layers. By adjusting the tilt angles and polarization states of the liquid crystal layers, the system can transform between wide and narrow viewing angle modes, thereby controlling information visibility based on 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 enhances anti-peeping performance by reducing the viewing angle range and maintaining overall brightness, offering improved operational convenience and security.
Implementation Method 1
Each of the first polarizing portions has a first transmission axis, the polarizer has a second transmission axis, and the first transmission axis is perpendicular to the second transmission axis
Implementation Method 2
by configuring the transmission axis of the polarizer provided between the display panel and the viewing angle control device of the above embodiment to be perpendicular to the transmission axis of the polarizing portion of the viewing angle control device, the display apparatus can have a filter effect at a large viewing angle
Data Source
AI summary
A viewing angle control device including a plurality of first polarizing portions and a plurality of transmissive portions is provided. The first polarizing portions are arranged along a first direction and extended in a second direction. The transmissive portions and the first polarizing portions are alternately arranged. Each of the first polarizing portions has a width in the first direction and a height in a direction perpendicular to the first direction and the second direction. A ratio of the height to the width of the first polarizing portion is greater than 1. A display apparatus adopting the viewing angle control device is also provided. The viewing angle control device and the display apparatus provided herein have a filter effect at a large viewing angle, improved light transmittance in the viewing angle direction, and excellent anti-peeping performance.