| 摘要 |
A ticket printer that includes a plurality of LEDs for emitting light that is visible to a user removing a ticket, wherein the printer is able to transfer information to the exterior, using the light of the LEDs without adding further light emitting means, by means of a modulator that enables the LEDs to emit a pulsed light signal that contains information on the identity of the printer and which can be received and read by an external decoder. |
