Display Image Rotation Control Using Azimuth Intervals and Buffer Zones
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Solution Overview
Problem
Existing display technologies face issues with improper switching of image display modes due to incorrect responses to changes in the gravity acceleration vector, leading to unnecessary or incorrect rotation of images on electronic devices.
Innovation Solution
A method and apparatus that establish a coordinate system with defined azimuth intervals and buffer regions on a display screen, using a gravity sensor to determine the orientation of the device and control image rotation based on the actual azimuth interval, preventing unnecessary mode switching by incorporating buffer regions between adjacent intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display mode switching is triggered by gravity acceleration vector changes, then the image rotation responds to device orientation changes, but improper switching occurs due to incorrect response or failure to obtain rotated image during fast rotation
Solution Approach 1:
The coordinate plane is divided into four distinct azimuth intervals with boundary lines intersecting at the origin. Each interval corresponds to a specific display mode, creating clear segmentation that eliminates ambiguity in mode selection. The buffer regions are further segmented as sub-regions within intervals, providing additional granularity for controlling mode transitions.
Solution Approach 2:
Buffer regions are introduced as intermediary zones between adjacent azimuth intervals. These buffer regions act as mediators that prevent direct switching between display modes when the gravity vector is near boundary lines, thereby eliminating improper switching caused by fast rotation or incorrect response. The buffer regions serve as a transition zone that stabilizes the switching decision.
2Reliability
If buffer regions are defined around boundary lines to prevent improper switching, then unnecessary mode switching is reduced, but the control logic becomes more complex
Solution Approach 1:
Different regions of the coordinate plane are assigned different properties: azimuth intervals have uniform characteristics corresponding to specific display modes, while buffer regions have distinct characteristics that trigger mode maintenance. This local differentiation allows the system to apply simple rules locally (check if gravity vector falls in interval or buffer) without requiring complex global analysis.
Solution Approach 2:
The buffer regions are pre-defined around boundary lines before any switching decision is made. This preliminary structuring of the coordinate plane with predefined safe zones eliminates the need for complex real-time analysis during fast rotation, as the system only needs to check which pre-defined region the gravity vector currently occupies.
3Stability of the object's composition
If the system checks whether gravity acceleration vector azimuth angle is kept in the current display mode's azimuth interval, then unnecessary rotation is prevented, but response time may increase during fast rotation
Solution Approach 1:
The buffer regions provide an excessive safety margin by extending beyond the minimal necessary protection zone. This excessive action ensures that even during fast rotation, the system has sufficient buffer space to maintain stable display mode without requiring multiple verification checks, thereby maintaining both stability and response speed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively prevents unnecessary image rotation by accurately determining the device's orientation and maintaining the current display mode unless a significant change occurs, ensuring stable image orientation during device rotation.
Implementation Method 1
determining whether an azimuth angle of a gravity acceleration vector component in the coordinate plane
Data Source
AI summary
A method for controlling rotation of an image displayed in a display screen includes establishing a coordinate system with an origin being set at a center of the display screen. The coordinate system includes a coordinate plane in parallel to an average plane associated with the display screen. The method further includes dividing the coordinate plane to four azimuth intervals corresponding respectively to four display modes with four boundary lines being all intersected at the origin of the coordinate system. Additionally, the method includes defining a respective buffer region in a respective angular range around a respective boundary line. Furthermore, the method includes determining whether an azimuth angle of a gravity acceleration vector component in the coordinate plane is kept in a respective azimuth interval corresponding to a current display mode of the image including two buffer regions respectively associated with two boundary lines of the respective azimuth interval.