Optical Adjustment Layer for Anti-Prying Display Privacy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices with anti-prying functions struggle to effectively limit visibility from angles greater than 45 degrees, compromising privacy in applications like ATMs, customs, and notebooks.
Innovation Solution
Incorporating a viewing angle control panel with a backlight module featuring an optical adjustment layer that includes a light source and a light guiding plate, where the optical adjustment layer has openings and blocking parts to control light emission angles, enhancing the anti-prying effect by reducing visibility from side angles while maintaining clarity for direct viewers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional display devices are used, then viewing clarity for direct viewers is maintained, but visibility from angles greater than 45 degrees cannot be effectively limited
Solution Approach 1:
The optical adjustment layer is divided into multiple segments including a light guiding plate with light-emitting regions and non-light-emitting regions, and a viewing angle control panel with light-transmitting regions and light-blocking regions. This segmentation allows different zones to control light transmission independently, achieving effective viewing angle limitation while maintaining direct viewing clarity
Solution Approach 2:
Different regions of the optical adjustment layer are assigned different optical properties: the light-emitting regions have high light transmission for direct viewing, while the light-blocking regions have low light transmission for side angles. This local differentiation enables the display to provide optimal viewing experience for direct viewers while effectively blocking side-angle visibility
2Object-affected harmful factors
If viewing angle control is enhanced, then privacy protection is improved, but light transmission and brightness may be compromised
Solution Approach 1:
The optical adjustment layer acts as an intermediary between the backlight module and the display panel. It includes a light guiding plate that directs light forward and a viewing angle control panel that selectively transmits or blocks light based on viewing angle, thereby protecting privacy without significantly compromising overall light transmission and brightness
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 significantly enhances the anti-prying capability by reducing luminance and visibility from angles greater than 45 degrees, while maintaining high brightness and picture quality for direct viewers, thus improving privacy and security in various applications.
Implementation Method 1
The backlight module is arranged below the viewing angle control panel, and includes a light source and an optical adjustment layer
Data Source
AI summary
A display device includes a viewing angle control panel and a backlight module. The backlight module is arranged below the viewing angle control panel, and includes a light source and an optical adjustment layer. The optical adjustment layer includes a first surface, a second surface and a plurality of openings. The second surface is arranged in opposite to the first surface and in proximity to the light source. The plurality of openings pass through the optical adjustment layer.