Liquid Crystal Display Multi-Camera Capture Circuit
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Solution Overview
Problem
Liquid crystal displays with built-in cameras have limited video capture functionality, as they can only capture videos of people and objects directly in front of the device and are unable to provide a full range of angles for video surveillance.
Innovation Solution
A liquid crystal display equipped with a first camera for capturing video from a front orientation and a second camera for capturing video from a rear orientation, both connected to a capture circuit that allows asynchronous or simultaneous video capture, enabling the device to capture videos from multiple angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single camera is used in the liquid crystal display, then the device complexity is low, but the video capture angle range is limited
Solution Approach 1:
The video capture function is segmented into multiple independent cameras positioned at different locations (front, rear, left, right edges) of the liquid crystal display. Each camera captures video from a specific orientation, and the capture circuit selectively activates appropriate cameras based on the desired capture angle, thereby expanding the overall video capture angle range while maintaining manageable system complexity through modular segmentation.
Solution Approach 2:
The patent transitions from a single-camera system to a multi-camera spatial arrangement by adding dimensional diversity. Cameras are positioned at multiple edges and orientations (front, rear, left, right) of the display, creating a three-dimensional capture geometry that encompasses a full 360-degree angle range, thus solving the angle limitation without proportionally increasing complexity through intelligent camera selection.
2Adaptability or versatility
If multiple cameras are added to expand video capture angles, then the video capture angle range increases, but the device complexity increases
Solution Approach 1:
The capture circuit implements dynamic camera selection by selectively activating only the necessary cameras based on the desired video capture orientation. The system can dynamically switch between different camera combinations (e.g., front camera alone, rear camera alone, or multiple cameras simultaneously) to achieve various angle ranges, thereby managing device complexity through intelligent control rather than permanently activating all cameras.
Solution Approach 2:
The capture circuit is designed with multi-functionality to handle various video capture scenarios using different subsets of the same camera array. A single capture circuit can activate cameras in different configurations (single camera, dual camera, selective simultaneous capture) to achieve diverse angle ranges, making the system universally adaptable without requiring separate hardware for each capture mode.
3Adaptability or versatility
If cameras are positioned at multiple edges of the liquid crystal display, then the video capture coverage is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent employs asymmetric camera positioning at specific edges (front, rear, left, right) rather than symmetric distribution. This asymmetric arrangement is optimized to achieve comprehensive 360-degree coverage while being tolerant of manufacturing variations. The capture circuit compensates for positional variations through selective camera activation and image processing, reducing the stringency of manufacturing precision requirements.
Data Source
AI summary
An exemplary liquid crystal display (2) includes a first camera (23) configured for capturing video from a first orientation, a second camera (24) configured for capturing video from a second orientation different from the first orientation, and a capture circuit (20) electrically connected to the first and the second cameras. The capture circuit is configured for controlling the first and the second cameras to capturing video asynchronously or simultaneously.