Wireless Auxiliary Stream Device for Selective Screen Projection

The patent employs a wireless communication module that supports multiple wireless communication protocols (such as Wi-Fi, Bluetooth, etc.), enabling the projection device to universally connect with different terminal devices without requiring multiple physical interfaces. This multi-functional wireless module replaces traditional wired video output interfaces, achieving broad compatibility while maintaining simple device architecture.

The patent replaces the mechanical wired connection system (physical video output interfaces like HDMI, VGA) with a wireless communication system. By using wireless transmission to carry projection data, the device eliminates the need for multiple physical interfaces and connection lines, thereby reducing device complexity while maintaining compatibility with various terminal devices.

The patent segments the screen content into different types (such as presentation content, chat windows, notification messages, etc.) and applies different projection strategies to each segment. By identifying and separating sensitive content from non-sensitive content, the system can selectively project only appropriate content while keeping sensitive information private, thus resolving the contradiction between content sharing and privacy protection.

The patent implements different projection quality levels for different regions or types of content on the screen. Important or sensitive areas (like chat windows, personal messages) are excluded or blurred, while presentation content areas are projected clearly. This local differentiation of projection quality allows effective content sharing while protecting user privacy in specific regions.