Collapsible light diffusing device and diffused lighting apparatus
OwnerMartin Charles Grahaminventor
Life of this patent
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Abstract
A diffused lighting apparatus including a collapsible light diffusing device is disclosed. A collapsible housing has a folded and an unfolded condition and defines in the unfolded condition a first aperture and a second aperture, larger than the first aperture. A lamp body (13) contains lamp units (16) which emit light through the apertures. A flexible light diffusing member (11) covers the second aperture. The housing comprises rigid panels (6, 7, 10, 11) of heat resistant material hinged together to enable the housing to be folded between the folded and unfolded conditions.
Claims16
A collapsible light diffusing device, the device comprising:
- a collapsible housing having a folded and an unfolded condition, the housing in said unfolded condition defining a first aperture and a second aperture, larger than the first aperture, and adapted to be mounted to a light source such that said first aperture is nearer to said light source than said second aperture;
- and
- a flexible light diffusing member adapted to cover the second aperture when the housing is in the unfolded condition thereof;
- wherein the housing comprises a plurality of substantially rigid panels of heat resistant material, the panels being hinged together to enable the housing to be folded between said folded and unfolded conditions.
A device according to any one of the preceding claims, wherein at least one said panel is located between the flexible light diffusing member and the components defining the first aperture when the housing is in the folded condition thereof.
A device according to any one of the preceding claims, wherein the housing has a substantially polygonal transverse cross-section in the unfolded condition thereof.
A device according to any one of the preceding claims, wherein the first aperture is substantially rectangular.
A device according to any one of the preceding claims, wherein the housing preferably comprises four substantially rectangular panels, each of which is hinged to a respective side of said first aperture, and four substantially triangular panels, each of which is arranged between a respective pair of adjacent rectangular panels in the unfolded condition of the housing, and wherein each said triangular panel is hinged along one edge thereof to a respective rectangular panel.
A device according to any one of the preceding claims, wherein said panels are made from a carbon fibre composite.
A device according to any one of the preceding claims, wherein each said panel is provided with a light reflecting surface.
A device according to any one of the preceding claims, wherein the diffusing member is formed substantially of fabric.
A device according to any one of the preceding claims, wherein the diffusing member is removably mounted to the housing.
A collapsible light diffusing device, the device substantially as hereinbefore described with reference to the accompanying drawings.
A diffused lighting apparatus, the apparatus comprising a collapsible light diffusing device according to any one of the preceding claims, and a light source arranged in use adjacent said first aperture when the housing is in the unfolded condition thereof.
Dependencies are inferred from the claim text.