An example of a robot vacuum cleaner block diagram is shown here. This (Part 2) presentation will focus on highlighting laser diode and light emitting diode (LED) solutions from ROHM, while Part 1 focuses on sensor solutions from ROHM. Robots need various types of sensors to receive input about the environment around them. Laser diodes are a means for robots to gauge distance and motion. LEDs are used in robots for lighting purposes as well as various indicator signals.