As a reading light source, a cold-cathode tube having three wavelengths and an LED array are used in combination. The cold-cathode tube and the LEDs are lit up at different timings when reading a document.

 
Web www.patentalert.com

< Light source having more than three LEDs in which the color points are maintained using a three channel color sensor

> Light emissive signage devices based on lightwave coupling
~ 00403