Wi-Fi Direct Screen Sharing Resolution Adaptation
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Solution Overview
Problem
Wi-Fi Direct screen sharing services often result in unnecessary images, such as black bars, being displayed due to aspect ratio or resolution mismatches between devices, disrupting the user experience by cluttering the screen and requiring inconvenient orientation adjustments.
Innovation Solution
A wireless device system that transmits resolution information using RTSP, allows for image adjustment by removing unnecessary images, and provides control options like size and transparency adjustments to optimize image display on the receiving device, ensuring proper aspect ratio and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If screen sharing is performed between P2P devices with different resolutions and aspect ratios, then compatibility between devices is improved, but unnecessary images (black bars) are displayed on the receiving device
Solution Approach 1:
The patent extracts and removes the unnecessary black bar images from the received screen share content. The receiving device identifies the actual content area within the received image and crops out the surrounding black bars, displaying only the meaningful content portion to eliminate visual clutter while maintaining compatibility across different device resolutions and aspect ratios.
Solution Approach 2:
The patent changes the display parameters by dynamically adjusting the visible content area based on the detected actual content boundaries. Instead of displaying the entire received image including black bars, the system modifies the display parameters to show only the relevant content region, thereby transforming the display state from including unnecessary elements to showing only essential content.
2Reliability
If the receiving device displays the entire received image including black bars, then complete image transmission is achieved, but the user experience deteriorates due to cluttered screens
Solution Approach 1:
The system extracts the essential content from the complete received image by identifying and isolating the actual content area. This extraction process removes the black bar portions while preserving the complete meaningful content, thereby maintaining reliability of content transmission while significantly improving user experience by presenting a clean, clutter-free display.
3Adaptability or versatility
If a mobile phone transmits screen in vertical orientation when disposed horizontally, then screen mirroring functionality is provided, but the transmitted image does not match the device placement direction
Solution Approach 1:
The patent implements dynamic orientation adaptation where the receiving device detects its own placement direction (horizontal or vertical) and dynamically adjusts the displayed image orientation accordingly. This dynamic adjustment ensures that the transmitted screen content automatically matches the device's physical placement direction, providing an intuitive viewing experience without requiring manual orientation changes.
Data Source
AI summary
A wireless device supporting Wi-Fi Direct service includes: a display; a communication unit; and a controller configured to cause: transmitting resolution information including a plurality of resolutions that are supported by the wireless device to a second wireless device; receiving an entire image including a first image and a second image from the second wireless device if a resolution of the first image is not one of the plurality of resolutions; displaying the first image by removing the second image from the received entire image when the entire image is received; and receiving the first image from the second wireless device without the second image if the resolution of the first image is included in the resolution information, the second image being an image that is added to the first image such that a resolution of the received entire image corresponds to one of the plurality of resolutions.