Rotating Display Adapting to Mobile Aspect Ratios
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Solution Overview
Problem
Smart televisions struggle to properly display images from mobile devices due to mismatched aspect ratios, resulting in wasted screen space and a poor user experience due to the inclusion of large black regions on the sides.
Innovation Solution
A display apparatus with a rotation assembly and controller that adjusts its orientation based on the aspect ratio of the image from the mobile device, rotating to match the device's portrait or landscape mode and enlarging the effective image area to fill the screen effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the image is scaled with the height of the mobile phone as a reference to completely display the image, then the image can be fully displayed, but large black regions appear on two sides of the displayed image and display space is wasted
Solution Approach 1:
The display apparatus dynamically adjusts its orientation (portrait/landscape) based on the aspect ratio of the incoming image stream. The controller determines whether to rotate the display to portrait state or maintain landscape state by comparing the image aspect ratio with the display aspect ratio, enabling the system to adapt to different image formats and eliminate black regions while maximizing display space utilization
2Device complexity
If the display maintains a fixed landscape state, then the display structure is simple, but images from portrait-mode mobile devices cannot be displayed properly
Solution Approach 1:
The display apparatus transitions from a fixed landscape state to a dynamic state where it can switch between portrait and landscape orientations. The rotation assembly enables physical rotation of the display panel, while the controller intelligently determines the appropriate orientation based on image aspect ratio analysis, thereby achieving multi-format compatibility without excessive structural complexity
Solution Approach 2:
The system changes the display orientation parameter (portrait vs. landscape) based on the aspect ratio parameter of the incoming image. By adjusting this key parameter dynamically, the display apparatus can properly display images from mobile devices in either portrait or landscape mode, resolving the contradiction between structural simplicity and format adaptability
3Adaptability or versatility
If the display rotates to match the mobile device orientation, then the aspect ratio mismatch is resolved, but the device complexity increases due to the rotation assembly
Solution Approach 1:
The display apparatus incorporates a rotation assembly that enables dynamic orientation adjustment. The controller activates the rotation assembly only when aspect ratio mismatch is detected, allowing the display to switch between portrait and landscape states as needed, thereby achieving orientation matching while minimizing unnecessary operational complexity
Solution Approach 2:
The system changes the physical orientation parameter of the display by 90 degrees when required, based on aspect ratio analysis. This parameter change is achieved through the rotation assembly, which provides a mechanical solution for orientation adjustment without requiring complete redesign of the display structure
Data Source
AI summary
The disclosure provides a display apparatus and a cast method, including: a display; a rotation assembly; and a controller configured to receive image information sent from a terminal device. When the terminal is in a portrait mode, the image information includes effective area information and left and right black area information. The effective area information corresponds to content displayed on a current screen of the terminal device. The display is controlled to present a cast image based on the effective area information. The cast image is obtained by enlarging the effective area information by preset times.