Portable Display Rotation Control for Seamless Video Playback
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Solution Overview
Problem
Existing display devices struggle with maintaining high-quality image output and continuous audio playback during rotation, leading to degraded user experience due to black areas and interruptions.
Innovation Solution
A portable display device with a controller that stores video paths for different rotation states, detects changes in display orientation, pauses the current video, and resumes playback from a synchronized secondary video path based on the detected rotation state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display rotates during video playback, then the display can adapt to different viewing orientations, but the image quality degrades with black areas and audio playback may be interrupted
Solution Approach 1:
The system pre-stores multiple video files corresponding to different rotation states (horizontal, vertical, and intermediate angles) before playback. When rotation is detected, the controller seamlessly switches to the pre-prepared video file matching the new orientation, avoiding quality degradation and playback interruptions.
Solution Approach 2:
The system changes the playback parameter by selecting different video files based on the detected rotation angle. Each video file is encoded with specific orientation parameters, and the controller adjusts the playback source according to the current display orientation, maintaining optimal image quality across all rotation states.
2Device complexity
If a single video file is used for all rotation states, then the device complexity is reduced, but the image quality and full-screen coverage are compromised
Solution Approach 1:
The system creates multiple copies of the same video content, each encoded and optimized for a specific rotation state. These copies are stored in advance, allowing the controller to select the appropriate version based on display orientation, ensuring high-quality full-screen coverage without requiring complex real-time transformation algorithms.
3Manufacturing precision
If video playback is paused and resumed during rotation, then the correct orientation video can be loaded, but the playback continuity is interrupted
Solution Approach 1:
By pre-storing video files for all possible rotation states, the system eliminates the need to pause playback for file switching. The controller detects rotation and immediately switches to the corresponding pre-loaded video file, maintaining continuous playback without interruption or quality loss.
Data Source
AI summary
Disclosed herein is a portable display device. The portable display device may include: a display; and a controller. The controller is configured to: store a storage path of a first video and a storage path of a second video, wherein the first and second videos are related to at least two rotation states of the display; detect a change in a rotation state of the display during playback of the first video; store a video playback time at a moment at which the rotation state of the display changes; pause the playback of the first video that is currently playing; and control the second video to be played at a playback start time based on the storage path of the second video related to the detected rotation state, wherein the playback start time is determined based on the stored video playback time.