| 摘要 |
The invention relates to a light box, intended especially for the backlighting of liquid crystal displays. The box includes a lightguide in the form of a thin plate having two opposed main faces and at least two edges, the lightguide having a light-diffusing optical structure on one of the faces. Light-emitting diodes are placed linearly along at least one of the edges of the lightguide, the light emitted by the light-emitting diodes illuminates the lightguide via the edge, and is being diffused by that face of the lightguide having the optical structure. The light-emitting diodes placed along each of the edges of the lightguide are organized in at least two rows and in such a way that a light-emitting diode in one row supplied by an electric power supply (S 1 to S 8 ) is immediately followed by a light-emitting diode in the other row supplied by another electric power supply.
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