Camera Lift-and-Retract Proxy Control for App Switching
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Solution Overview
Problem
In conventional technologies, cameras on large-screen devices are repeatedly lifted and retracted when quickly switching between applications, leading to complex time sequence control and inefficient module invocations.
Innovation Solution
A camera control method and system that maintains a persistent connection between the display apparatus and the photographing apparatus, using dual-protocol communication to associate stream states with motor control, reducing redundant module invocations and simplifying time sequence control by integrating RNDIS and UVC protocols for efficient camera lifting and retracting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different applications control the camera through different interfaces or modules, then each application can independently control camera lifting and retracting, but the camera is repeatedly lifted and retracted when quickly switching between applications
Solution Approach 1:
The patent introduces a proxy module as an intermediary between applications and the camera lifting mechanism. The proxy module receives stream on/off instructions from different applications through a unified interface, manages the lifting component control centrally, and prevents repeated lifting/retracting operations when applications switch quickly. This mediator approach maintains application independence while simplifying the overall control logic.
2Reliability
If the camera is controlled to lift and retract with each application switch, then each application can ensure proper camera positioning, but the lifting and retracting operations are repeated frequently causing inefficiency
Solution Approach 1:
The proxy module performs preliminary checking before executing lifting or retracting operations. It monitors the current state of the camera and determines whether lifting/retracting is actually needed based on the stream on/off instructions and current positioning, thereby avoiding redundant operations while ensuring proper camera positioning when necessary.
Solution Approach 2:
The system implements feedback mechanisms where the proxy module continuously monitors the camera state and lifting component status. This feedback allows the system to make intelligent decisions about whether to execute lifting or retracting operations, preventing repeated actions when applications switch quickly while maintaining reliable camera positioning.
3Adaptability or versatility
If multiple interfaces and modules are used for camera control, then different applications can use their preferred control methods, but the number of module invocations increases and control logic becomes complex
Solution Approach 1:
The proxy module serves as a universal control interface that can handle stream on/off instructions from different applications through a unified mechanism. It provides multi-functional capability by supporting various application types (video calling, photography, streaming) while maintaining simple control logic, thereby improving ease of operation without sacrificing interface compatibility.
Data Source
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AI summary
Embodiments of this application disclose a camera control method and system, and an electronic device. According to the technical solution provided in embodiments of this application, lifting or retracting of a camera is associated with a stream on state of the camera, and a native interface of an operating system does not need to be invoked to control a motor to lift or lower, and an application does not need to have additional logic for invoking the motor, so that fewer modules are invoked for controlling lifting or retracting of the camera, and time sequence control is simpler. In addition, redundancy control logic used after the camera is disabled is added, so that a problem of repeatedly lifting and retracting the camera during switching between a plurality of applications can be avoided.