Game lovers are likely to be familiar with Nvidia's graphics processors. The US tech firm continues to derive the bulk of its revenue from gaming-related semiconductors, but there is now a new growth segment -- chips for artificial intelligence (AI). Business related to deep learning, a core part of an artificially intelligent machine, is one key factor behind Nvidia's impressive first-quarter results. The advanced machine learning function is being applied to numerous areas, including speech recognition, video search, face detection and self-driving vehicles. Nvidia is already working closely with automaker Tesla in development of driverless car technology, which deploys AI to detect pedestrians and track lanes and to recognize traffic signs.