Renesas achieve visible light communication using LED lighting

Renesas electronics demonstrates the use of existing equipment for indoor communications networks. The network uses existing wires and LED lighting.

For example, the idea of the use of the shop where the LED lighting is located below the shop to send people to the shopping information, to the factory is located in the LED lighting below the robot to send control information and other purposes. According to the exhibition guide, the use of existing equipment, low cost, so there is import to narrow range just below the LED lighting to send information, using visible light to the human body and almost no adverse effect on the characteristics of electronic equipment.

Through wire communication (PLC:Power Line Communication) to send information to LED lighting. Visible light communication between LED lighting and target terminals. Change the LED lighting (the human eye can not see the change), so that the information included. The visible light communication conforms to the CP-1223 standard of JEITA.

The development of a 1cm * 2cm small visible light communication module, and it is equipped with U disk. Thus, the U disk into the end user (such as the store's customers) on the tablet PC, you can display on the screen of the tablet PC products in front of the user's information. 1cm * 2cm receiver module is equipped with illumination sensor, signal amplifier and MCU, etc..

Although in the sun can not be used outdoors, but in the room, it can work in the range of 13 thousand to 20L wide illumination. According to reports, although also depends on the illumination of LED lighting, but can be in the range of about 5m below. Low power consumption is also a feature of 1 days by the dry battery drive for 3 hours, then can work for 16 months.