Dual-Viewing-Angle Pixel Circuit for Privacy Display Panels
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Solution Overview
Problem
Existing display devices face issues with information leakage to third parties and require security films that need separate management, increasing bezel width and contributing to greenhouse gas emissions during manufacturing.
Innovation Solution
A display device with sub-pixels having different viewing angles controlled by emitting control signals, utilizing a first and second emitting element, and transistors to manage viewing angles without security films, reducing bezel width and greenhouse gas emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a security film is attached to the display device to prevent information leakage, then viewing angle control is improved, but the bezel width increases and device complexity increases
Solution Approach 1:
The patent extracts the viewing angle control function from the external security film and integrates it directly into the display panel through dedicated emitting elements and control circuits. This eliminates the need for separate security films while maintaining viewing angle control capability.
Solution Approach 2:
The patent merges the viewing angle control function with the display panel structure by integrating emitting elements, control transistors, and control lines directly into the pixel structure. This combination eliminates the need for separate security films and reduces overall device complexity.
2Reliability
If a security film is attached to the display device to prevent information leakage, then viewing angle control is improved, but device complexity increases due to separate film management
Solution Approach 1:
The patent merges the viewing angle control function with the display panel structure by integrating emitting elements, control transistors, and control lines directly into the pixel structure. This combination eliminates the need for separate security films and reduces overall device complexity.
Solution Approach 2:
The patent creates a multi-functional pixel structure that simultaneously provides display and viewing angle control functions through integrated emitting elements and control circuits. This universal design eliminates the need for separate security film management.
3Ease of manufacture
If conventional display structures are used without viewing angle control integration, then manufacturing is simpler, but information security is compromised
Solution Approach 1:
The patent segments the display function into multiple emitting elements with different viewing angle characteristics. Each emitting element is controlled independently through dedicated control lines and transistors, allowing selective activation to control information visibility while maintaining manufacturing feasibility.
Solution Approach 2:
The patent applies local quality by creating different emitting elements with specific viewing angle properties at different locations within the display panel. Each emitting element is optimized for its specific function, with some providing wide viewing angles and others providing narrow viewing angles for security purposes.
Data Source
AI summary
A display device may include sub-pixels, each sub-pixel including: a first mode sub-pixel having a first viewing angle and including a first emitting element; a second mode sub-pixel having a second viewing angle and including a second emitting element; a driving transistor; a first emitting control line supplying a first emitting control signal; a second emitting control line supplying a second emitting control signal; a first switching transistor supplying a reference voltage to a storage capacitor by being controlled by the first emitting control signal; a second switching transistor supplying a reference voltage to a storage capacitor by being controlled by the second emitting control signal; a first control transistor connecting the first emitting element and the driving transistor by being controlled by the first emitting control signal; and a second control transistor connecting the second emitting element and the driving transistor controlled by the second emitting control signal.