Optical Encryption Panel for Real-Time Display Security
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Solution Overview
Problem
Conventional display encryption technologies for Liquid Crystal Displays (LCDs) lack real-time security and are easily compromised, as they either distort images or rely on polarizers that can be bypassed, resulting in poor security.
Innovation Solution
A display system comprising a display apparatus and a decryption apparatus with an encryption panel and a decryption panel, where the panels generate encryption and decryption areas with different polarizing states based on driving signals derived from a cipher, ensuring that only authorized decryption means can view the images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If video signal encryption technology is used, then signal transmission security is improved, but real-time viewing capability deteriorates
Solution Approach 1:
The patent replaces conventional video signal encryption (electrical signal processing) with optical encryption using liquid crystal panels. The encryption is achieved by modulating light polarization states through liquid crystal molecules oriented in specific patterns, converting the encryption mechanism from electrical to optical domain, thereby enabling real-time viewing while maintaining security
Solution Approach 2:
The patent changes the encryption approach by modifying optical parameters (polarization states, phase delays) rather than encrypting video signals electrically. By controlling liquid crystal orientation and using phase delay films with specific optical properties, the system encrypts visual information through optical parameter modulation, achieving both real-time performance and security
2Ease of manufacture
If a polarizer is removed for encryption, then encryption function is achieved, but security deteriorates because images can be viewed with available polarizers
Solution Approach 1:
The patent applies local quality by creating encryption areas with specific liquid crystal orientations and phase delay properties at different locations on the panel. Each region has customized optical characteristics that work together to form the encrypted image, making it impossible to decrypt without the specific panel configuration
Solution Approach 2:
The patent uses composite material structures combining liquid crystal panels with phase delay films having specific optical properties. The combination of liquid crystal molecules oriented in encryption patterns and phase delay films creates a composite system with unique optical characteristics that provide secure encryption
3Reliability
If phase delay films are adhered to distort images, then encryption is achieved, but security deteriorates because images can be acquired by trying different delay amounts
Solution Approach 1:
The patent applies preliminary action by pre-configuring liquid crystal molecules in specific encryption patterns and pre-selecting phase delay film properties during manufacturing. The encryption is built into the panel structure itself, eliminating the need for trial-and-error with different delay amounts and providing inherent security
Solution Approach 2:
The patent creates a unique optical fingerprint for each encryption panel through specific liquid crystal orientations and phase delay characteristics. This unique configuration acts as an uncopyable key, ensuring that even if the encryption method is known, the specific panel configuration cannot be replicated to decrypt images
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 approach provides a high-level encryption function by converting images into different polarizing states, making them viewable only with the corresponding decryption means, thus enhancing security and preventing unauthorized access.
Implementation Method 1
the encryption panel generates a plurality of encryption areas according to the first driving signal, and converts the incident second display light into the first display light having different polarizing states in different encryption areas
Implementation Method 2
converts the incident second display light into the first display light having different polarizing states
Data Source
AI summary
The present invention discloses a display system and an encryption and decryption method thereof. The display system includes a display apparatus and a decryption apparatus. The decryption apparatus includes a decryption device which includes a decryption panel. The display apparatus generates encrypted first display light. The decryption panel decrypts the first display light according to a preset cipher.