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One side of the light-transmitting acrylic sheet is specially processed via a method such as reflective dot printing. (Fig.1)
When the light emitted by the LEDs or other light source is transmitted from the edge of the light-transmitting sheet, it is reflected in toward the inside of the light-transmitting sheet. The light thus reflected is repeatedly radiated from the surface so that it spreads out inside the light-transmitting sheet.(Fig.2)
Light sources such as LEDs or cold cathode tubes are positioned at the edges of this light-transmitting sheet, and surface light emission is obtained by the combination of the reflective surface and the dispersion surface.(Fig.3)