Display Subpixels with Dual Viewing Angles for Secure Information
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Solution Overview
Problem
Display apparatuses face challenges in securely displaying information, as image data can be inadvertently revealed to unauthorized individuals, necessitating a solution for selective security modes without the need for external security films.
Innovation Solution
A display apparatus is designed with subpixels that can switch between normal and security modes by utilizing a substrate with first and second mode pixels, each having distinct viewing angles, and employing a low refractive structure and separate transistors to manage light emission, allowing for secure image display without external security films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a security film is attached to the display apparatus to prevent unauthorized viewing, then security is improved, but device complexity and ease of operation deteriorate due to separate management requirements
Solution Approach 1:
The patent merges the security function with the display apparatus itself by integrating pixels with different viewing angle characteristics into the same display device. This eliminates the need for separate security films and their associated management complexity, while maintaining security through the inherent optical properties of the integrated pixels
Solution Approach 2:
The display apparatus provides its own security function through integrated pixels with different viewing angles, eliminating the need for external security films. The system serves its own security needs internally, reducing device complexity and improving ease of operation
2Reliability
If a security film is attached to prevent unauthorized viewing, then security is improved, but ease of operation worsens due to attachment and detachment procedures
Solution Approach 1:
The security function is merged into the display apparatus through integrated pixels with different viewing angles, eliminating the need for separate attachment and detachment operations. Users can switch between security and normal modes through simple control operations, significantly improving ease of operation
3Reliability
If pixels with different viewing angles are integrated in the same subpixel, then security is improved without external films, but manufacturing precision deteriorates due to complex pixel structures
Solution Approach 1:
The patent segments the pixel structure into first mode pixels and second mode pixels with different viewing angle characteristics, allowing each segment to be optimized independently while maintaining overall security functionality. This segmentation approach balances manufacturing feasibility with security requirements
4Device complexity
If multiple pixel modes are integrated in the same subpixel, then device complexity is reduced by eliminating external films, but manufacturing precision worsens due to complex pixel structures
Solution Approach 1:
The pixel structure is segmented into distinct first mode and second mode pixels within each subpixel, allowing for systematic manufacturing processes. This segmentation enables the integration of multiple pixel modes while maintaining manageable manufacturing complexity and acceptable precision levels
Data Source
AI summary
Disclosed is a display apparatus. The display apparatus includes a substrate including a first subpixel, a second subpixel, and a third subpixel. A bottom electrode is on the substrate. A light emitting layer is on the bottom electrode, and a top electrode is on the light emitting layer. Each of the first subpixel, the second subpixel, and the third subpixel includes a first mode pixel having a first viewing angle and a second mode pixel having a second viewing angle that is less than the first viewing angle.