Canon global

With conventional CCD scanners that employ fluorescent lamps, about 30 seconds of warm-up time is required after startup or re-activation from sleep mode. While using an LED^*1 as the light source eliminates warm-up time, because it is a point light source, technology is needed to convert it into a linear light source with uniform light intensity.
By applying the LED light guide technology Canon developed for its CIS scanners and researching LED installation and light guide formats, the company was able to develop a high-brightness white LED light source for scanners. This technology ensures stable light intensity immediately upon starting up the scanner, reducing warm-up time to zero. In addition, it is no longer necessary to keep the light on after scanning, which helps save energy.

Reduction of Warm-up Time Through Use of White LED Lamp

• *1 LED (Light Emitting Diode)
  A semiconductor diode that emits light when an electric current is applied. While LEDs are smaller and lighter than fluorescent lamps, have a longer lifespan, and require less electricity to run, lower light intensity has been cited as a drawback. Recently, as LED brightness has improved, they have been adopted for a wide range of applications.