Video projector and associated data transmission
AssigneeCanon Kabushiki Kaisha
InventorsLaurent Frouin, Lionel Tocze, Pierre Visa
Life of this patent
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Abstract
A video projector, a cluster of video projectors and a method for wirelessly transmitting image data within the cluster of video projectors. The video projector includes a first antenna located at a first side of the projector and a second antenna located at a second side of the projector, opposite to the first side. Image data is divided into sub-parts, and distributed by assigning each image data sub-part to a video projector. A video projector receiving image data sub-parts extracts and stores the image data sub-part assigned to it, and retransmits image data sub-parts assigned to respectively a second and third video projectors.
Claims23
A wireless transmission method for distributing image data within a cluster of video projectors, each video projector comprising first and second antennas, from a first video projector to other video projectors of the cluster, the method comprising:
- dividing the image data into several image data sub-parts;
- assigning each image data sub-part to a video projector in accordance with a composite image to be displayed by the cluster;
- the method further comprising at the first video projector:
- receiving image data sub-parts;
- extracting and storing the image data sub-part assigned to the first video projector;
- and
- retransmitting through the first and second antenna of the first video projector, image data sub-parts assigned to respectively second and third video projectors.
A video projector comprising a first antenna located at a first side of the projector and a second antenna located at a second side of the projector, opposite to the first side, wherein:
- the first antenna is configured to form a first radiation pattern that extends outwardly from the first side,
- the second antenna is configured to form a second radiation pattern that extends outwardly from the second side, and
- wherein the first and second radiation pattern do not interfere,
- wherein each antenna defines a central beam axis and is configured to form a substantially hemi-elliptical radiation pattern centered about this axis, and
- wherein the central beam axes are arranged to be inclined with respect to a reference direction of the video projector when in use.
A wireless cluster of video projectors for the transmission of image data from video projector to video projector, wherein each video projector of the cluster comprises a first antenna located at a first side of the projector and a second antenna located at a second side of the projector, opposite to the first side, wherein:
- the first antenna is configured to form a first radiation pattern that extends outwardly from the second side,
- the second antenna is configured to form a second radiation pattern that extends outwardly from the second side, and
- wherein the first and second radiation patterns do not interfere,
- the video projectors being arranged so that the first and second radiation pattern of a first video projector is configured to communicate with, respectively, at least one antenna of a second and one antenna of a third video projector.
Dependencies are inferred from the claim text.