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User Interface for Adjusting Projection to fit a Canvas Disclosure Number: IPCOM000239517D
Publication Date: 2014-Nov-13
Document File: 2 page(s) / 33K

Publishing Venue

The Prior Art Database


When a projector is connected to a computer, the image that is projected might not fit into the space (the canvas) onto which it is being presented. This a common problem found when giving presentations or even teaching, and since users are frequently of a non-technical background, the solution needs to be simple. Currently a user would be required to physically move the projector or change the screen resolution on their laptop in order to solve the problem, both of which bring their own issues and problems.

This article discusses a simple solution that would be intuitive to use, have a final result that fits perfectly to any physical canvas and would prevent the need to leave your laptop to move the projector.

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User Interface for Adjusting Projection to fit a Canvas

In existing solutions a user can either physically alter the projector, or can set the computer's resolution to match the projector resolution. Neither of these are ideal solutions. The first requires a user to easily be able to have physical interaction with the projector. As projectors can be hung from the ceiling or controlled from a projection room, this is not always possible. The second solution requires users to alter the configuration and display properties of their computer, which is challenging for a non-technical user to be able to do. It also requires altering the appearance of the users computer, which they may not want to do.

    The ability to have a computer screen with one aspect ratio, and the projection of that computer screen with another aspect ratio, is known. Rendering a projection at a different aspect ratio to the original ratio of that projection is known, but not necessarily details of how to implement such a solution.

    A user interface for providing mirrored displays, at different resolutions and aspect ratios, is also known in prior art. Prior art gives an explicit example of wanting a screen for the presenter, and a projector for the audience. However, this is still an independent application, and does not integrate itself into the user's system to improve their experience. Instead it provides a dashboard for altering configuration settings. A simpler solution is needed with a less intimidating appearance to non-technical users.

    This prior art proposes an interface that will allow users to intuitively control the appearance of the projection on the canvas. The user interface will be initiated using a keyboard shortcut. This interface will take the form of adjustable margins that define the area of the current projection that fits onto the canvas, or request for the user to drag an area within which the projection should re-render to. This will allow the projection to be rescaled appropriately to fit the canvas best, as such to maintain aspect ratio and to not obscure the slides/presentation.

    This is a better solution than the prior art discussed above since it provides for a very simple and intuitive interface for the user to perform what has been, until now, a laborious task. Although it uses similar ideas to an article described above in order to display the projection correctly, it differs by enabling the user to manually scale in accordance with physical limitations (the size of the canvas) as opposed to technical limitations (the resolutions of the projector).

    Our solution also demystifies the settings and interface of the prior art posed previously. The proposed user interface is far more intuitive for defining area boundaries. It also reduces the trial and error component of previous methods such as changing the resolution. This is because the user can define the region of the projection that is on the canvas by referring to their cursor posit...