Projector Control for Partial Screen Exposure
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Solution Overview
Problem
Existing electronic apparatuses that project images struggle to efficiently project images only to the exposed region of a screen device as it is unrolled or rolled, leading to inefficient use of projection resources and potential motion sickness for users.
Innovation Solution
An electronic apparatus equipped with a projector, input/output interface, memory, and processor that obtains screen information, transmits operation information to control the screen device's unrolling or rolling, and projects images only to the partial region of the screen that is exposed, while correcting the image based on motion information to minimize user discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the projector projects images to the entire projection region, then the image coverage is maximized, but projection resources are wasted when the screen is only partially unrolled
Solution Approach 1:
The projector dynamically adjusts the projection region based on the real-time unrolling state of the screen. The control unit receives screen state information and modifies the projection parameters to match the exposed screen area, ensuring that the projection region is neither too large (wasting resources) nor too small (reducing coverage).
Solution Approach 2:
The system implements a feedback mechanism where the control unit continuously monitors the screen's unrolling state and adjusts the projection region accordingly. This closed-loop control ensures that the projection resources are efficiently utilized by projecting only to the area where the screen is actually exposed.
2Productivity
If the projector projects to a partial region of the screen, then projection resources are optimized, but the image may not cover the entire exposed screen area
Solution Approach 1:
The projection region is dynamically adjusted to match the screen's exposed area. As the screen unrolls or rolls, the control unit modifies the projection parameters in real-time, ensuring that the projected image always covers the entire exposed screen area while avoiding projection into non-exposed regions.
Solution Approach 2:
The system changes projection parameters (such as projection angle, focal length, or digital scaling) based on the screen state information. This allows the projection to adapt to different screen exposure levels, maintaining full coverage of the exposed area while optimizing resource usage.
3Duration of action of stationary object
If the projector projects while the screen is moving during unrolling or rolling, then continuous image provision is maintained, but user motion sickness may occur
Solution Approach 1:
The control unit receives feedback about the screen's motion state and adjusts the projection accordingly. During screen movement, the system modifies the projection parameters to account for the changing geometry, ensuring that the image remains stable and properly aligned on the screen, thereby reducing visual discomfort for the user.
Solution Approach 2:
The system performs preliminary adjustments to the projection parameters based on anticipated screen movement. By pre-compensating for the geometric changes that will occur during screen unrolling or rolling, the system maintains image stability and prevents motion sickness before it occurs.
Data Source
AI summary
An electronic apparatus includes a projector, an input/output interface, a memory, and a processor that controls the electronic apparatus by executing at least one instruction stored in the memory. The processor obtains screen information of a screen device connected to the electronic apparatus, controls the input/output interface to transmit first operation information corresponding to an unrolling of the screen device in response to receiving a user command to project an image, and controls the projector to project a first image to at least a partial region of a region in which a screen of the screen device is exposed based on the screen information while the screen of the screen device is being unrolled, based on the first operation information.