Pixel Circuit Switching Between Privacy and Shared Viewing Angles
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Solution Overview
Problem
Existing vehicle display technologies struggle to adjust viewing angles independently for different areas of the screen, making it difficult to display personal and shared content simultaneously with desired privacy and visibility settings.
Innovation Solution
A pixel circuit with multiple light-emitting elements and switch elements that allow switching between a share mode and a privacy mode by selectively driving first and second light-emitting elements with different viewing angles, using a MUX switch unit to control mode selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single light-emitting element is used for each pixel, then the device complexity is reduced, but the viewing angle cannot be independently adjusted for different screen areas
Solution Approach 1:
The pixel circuit is segmented into multiple independent light-emitting elements (first light-emitting element and second light-emitting element) with different viewing angles. Each element can be independently controlled through separate switch elements, allowing the viewing angle to be adjusted by selecting which element to activate based on the display mode (share mode or privacy mode).
Solution Approach 2:
The pixel circuit incorporates dynamic switching capability through multiple switch elements (second switch element and third switch element) that can selectively connect to different light-emitting elements based on mode selection signals. This dynamic configuration allows the same pixel circuit to adapt its viewing angle characteristics in real-time between share mode and privacy mode without requiring physical reconfiguration.
2Adaptability or versatility
If multiple light-emitting elements with different viewing angles are used, then the viewing angle adjustability is improved, but the device complexity increases
Solution Approach 1:
The pixel circuit is designed with multi-functionality to handle both share mode and privacy mode operations using the same basic structure. The driving element generates driving currents for both light-emitting elements, and the switch elements are configured to enable either element based on mode selection signals, eliminating the need for separate dedicated circuits for each mode and reducing overall complexity.
Solution Approach 2:
The patent merges the control functions for multiple light-emitting elements into a unified pixel circuit structure. The driving element serves both light-emitting elements, and the switch elements are integrated into the same circuit layer, combining what could have been separate control systems into a single cohesive unit that reduces manufacturing complexity.
3Adaptability or versatility
If switch elements are added to enable mode switching, then the adaptability between share mode and privacy mode is improved, but the device complexity increases
Solution Approach 1:
The switch elements act as intermediaries that control the connection between the driving element and the light-emitting elements based on mode selection signals. These intermediary components enable flexible routing of the driving current to the appropriate light-emitting element without requiring complex control logic or additional processing stages, simplifying the overall system architecture.
Solution Approach 2:
The mode switching mechanism operates periodically based on mode selection signals that can be changed over time. The switch elements respond to these periodic or intermittent control signals to reconfigure the circuit connection, allowing the system to adapt between different operational modes without requiring continuous complex processing or permanent structural changes.
Data Source
AI summary
A pixel circuit, a display panel and a display device including the same according to an exemplary embodiment are disclosed. The pixel circuit according to the exemplary embodiment includes a first light-emitting element, a second light-emitting element, a driving element configured to generate a driving current of each of the first and second light-emitting elements, a first switch element connected between a gate electrode of the driving element and a power line through which a reference voltage is applied and turned on in response to a first gate signal, a second switch element connected between the driving element and the first light-emitting element and turned on in response to a second gate signal, and a third switch element connected between the driving element and the second light-emitting element and turned on in response to a third gate signal, wherein the first light-emitting element emits light at a first viewing angle, and the second light-emitting element emits light at a second viewing angle smaller than the first viewing angle.