| 摘要 |
The invention concerns an illuminated light box designed in particular for backlighting liquid crystal displays, the box comprising: a light guide (62) in the form of a thin plate having two opposite main faces (64, 66) and at least two edges (B1, B4), the guide having on one of its faces a light-diffusing optical structure (70); light-emitting diodes (Lnm) arranged linearly along at least one of the edges of the light guide, the light emitted by the light-emitting diodes, illuminating the guide through the edge, being diffused through the face of the guide comprising the optical structure. The light-emitting diodes arranged along each of the edges of the guide are organized into at least two rows (Rb1 to Rb8) such that one light-emitting diode (Lnm) of a row powered by an electric power source (S1 to S8) is immediately followed by a light-emitting diode (L(n+1)m) of the other row powered by another electric power source. |
