| 摘要 |
<p>An indicator or advertising board (1) comprising a display component (3) of an essentially sheet-like, transparent material and an illuminating component implemented using light-emitting diodes (5). The light-emitting diodes (5) are located in the immediate vicinity of the edge of the sheet-like display component (3), to light the sheet through the edge. The diodes (5) are at least of types emitting red, blue, and green light. The device includes a control unit (6), or at least a connection to a control unit, intended to control the intensity of the light emitted by the variously coloured diodes in relation to each other, in order to display different hues of colour on the board (1).</p> |
