Electronic Destination Signages (EDS) is a major feature of bus spotting in Singapore. It displays the operating service number and detail on the front, side and rear of the bus.
Currently, buses operated by Public Transport Operators in Singapore currently utilize either one of these three technologies :
The oldest form of EDS. Individual flip dots are turned using magnetic pulses to form the message. Illumination is done using florescent lighting.
Similar to the above, but the individual flip dots are illuminated by LED. This provides clearer visibility at night.
Individual LEDs form the display panel, which is then lit to form the message. It requires the use of constant power; the refresh rate of the LED units vary between manufacturers.
BKB Electronica S.A.Edit
Supplied dot-matrix units. Based in Barcelona, Spain.
Part of the Luminator Technology Group. Previously known as Lawo Luminator Europa, now just LAWO. Supplied dot-matrix, dot-matrix LED (Aluma) and full LED (Benefit) units. Based in Rastatt, Germany.
Supplied dot-matrix LED and full LED units under the name of Twin Vision. Merged with Mobitec. No longer in production.
Supplied dot-matrix (MobiDOT) and full LED (MobiLED) units. Based in Sweden.
Supplied dot-matrix and full LED units. Based in East Sussex, United Kingdom.
Supplied full LED units. Also supplied air-conditioning units and bodywork components. Based in Singapore.
Supplied full LED units. Better known as Sanyo Electric, which previously supplied farecard validator uits. Based in Gifu, Japan.