Handheld projector
（重定向自Pocket projector）
A Handheld projector (also known as a pocket projector, mobile projector, pico projector or mini beamer) is technology that applies the use of an image projector in a handheld device. It is a response to the emergence/development of compact portable devices such as mobile phones, personal digital assistants, and digital cameras, which have sufficient storage capacity to handle presentation materials but little space to accommodate an attached display screen. Handheld projectors involve miniaturized hardware and software that can project digital images onto any nearby viewing surface.