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US 7,740,365 B2Granted
Backlighting arrangement with semiconductor light sources arranged in light groups and lighting device
AssigneeOSRAM Opto Semiconductors GmbH
InventorsJosef Hüttner, Hubert Ott, Mario Wanninger
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Abstract
This invention relates to uniform backlighting of surfaces by semiconductor light sources. Various semiconductor light sources are combined into identical illumination groups. These identical illumination groups are arranged so that uniform backlighting of a surface is made possible. For homogeneous color mixing to be achieved, especially at edges, each illumination group in the arrangement has at least one adjacent illumination group in a different orientation.
Claims20
A backlighting arrangement comprising:
- a plurality of identical illumination groups, in which
- each illumination group has at least one adjacent illumination group with a different orientation,
- each illumination group is a radiation-emitting semiconductor component that has a plurality of semiconductor chips,
- at least two of the semiconductor chips provide different colors or color contributions,
- each illumination group has at least one red light-emitting semiconductor chip, at least one green light-emitting semiconductor chip, and at least one blue light-emitting semiconductor chip,
- at least two adjacent illumination groups in each case are rotated relative to one another by 90 or 180 degrees with respect to an imaginary axis along their principal direction of radiation,
- a plurality of illumination groups are attached to a first strip-shaped carrier and other illumination groups are attached to a second strip-shaped carrier adjacent to the first carrier, with the first and second carriers being arranged antiparallel to one another.
4 more elements
Dependencies are inferred from the claim text.