Screen Projection from Locked Device via Mediator Control
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Solution Overview
Problem
Existing screen projection systems cannot directly initiate screen projection of an application from a locked or screen-off state electronic device to another device, requiring the user to manually unlock and turn on the device.
Innovation Solution
A screen projection system and method that allows a user to initiate screen projection of an application from a locked or screen-off state electronic device by performing an operation on a control displayed on a second electronic device, without needing to interact with the first electronic device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first electronic device is in a lock screen or screen-off state, then power saving and security are improved, but the user cannot directly initiate screen projection from the second device
Solution Approach 1:
The patent introduces a second electronic device as an intermediary to enable screen projection initiation. When the first device is locked or screen-off, the user can still interact with the second device to trigger screen projection. The system uses a projection control interface on the second device that communicates with the first device to initiate the projection process without requiring direct interaction with the locked first device.
Solution Approach 2:
The patent implements preliminary action by pre-establishing a projection control interface on the second device before the first device is locked or turned off. This interface remains active and ready to receive user input even when the first device is in a locked state, allowing the user to initiate screen projection without first unlocking or powering on the first device.
2Reliability
If the user must manually unlock and turn on the first device to initiate screen projection, then the system maintains security control, but the operation process becomes complex and time-consuming
Solution Approach 1:
The second electronic device serves as a mediator that handles the screen projection initiation process. Instead of requiring the user to unlock and interact with the first device, the user simply operates the projection control interface on the second device, which then communicates with the first device to initiate projection. This significantly reduces the time and steps required for operation.
Solution Approach 2:
The patent segments the screen projection function into two independent parts: a projection control interface on the second device for user interaction, and a projection execution module on the first device. This segmentation allows the control and execution functions to be separated, enabling the user to initiate projection from the second device without directly interacting with or unlocking the first device.
3Ease of operation
If screen projection is enabled from lock screen or screen-off state, then user convenience is improved, but the system complexity increases
Solution Approach 1:
The second electronic device is designed with multi-functionality, serving both as a standalone device for user interaction and as a control interface for initiating screen projection from the first device. The projection control interface on the second device can receive user input and transmit projection initiation signals to the first device, enabling the second device to perform multiple functions without requiring complex system changes.
Data Source
AI summary
Embodiments of this application provide a screen projection system and an electronic device. The system includes a first electronic device and a second electronic device, an application message on the first electronic device is streamed to the second electronic device, and a corresponding message notification control is displayed on the second electronic device. The second electronic device receives an operation of a user on the message notification control at first time, and sends a screen projection request to the first electronic device, so that an interface to which the application message corresponds is displayed within a screen projection window of the second electronic device at second time, where the interface includes image information corresponding to the application message. The second time is later than the first time, and the first electronic device is in a lock screen or screen-off state in a time interval between the first time and the second time. In this way, the user can directly perform an operation on the second electronic device when the first electronic device is in the lock screen or screen-off state, thereby pulling up an application on the first electronic device to be screen projected on the second electronic device.