Projection keyboard.doc

Projection keyboard From Wikipedia, the free encyclopedia HYPERLINK /wiki/Projection_keyboard#mw-navigationHYPERLINK /wiki/Projection_keyboard#p-search A projection keyboard A projection keyboard is a form of computer HYPERLINK /wiki/Input_deviceinput device whereby the image of a HYPERLINK /wiki/Virtual_keyboardvirtual keyboard is projected onto a surface: when a user touches the surface covered by an image of a key, the device records the corresponding keystroke. History An HYPERLINK /wiki/Opticaloptical virtual keyboard was invented and patented by HYPERLINK /wiki/IBMIBM engineers in 1992. It optically detects and analyses human hand and finger motions and interprets them as operations on a physically non-existent input device like a surface with painted or projected keys. In that way it can emulate unlimited types of manually operated input devices (such as a mouse, keyboard, and other devices). Mechanical input units can be replaced by such virtual devices, potentially optimized for a specific application and for the users physiology, maintaining speed, simplicity and unambiguity of manual data input. In 2002, Israeli HYPERLINK /wiki/Start-up_companystart-up company Canesta developed a projection keyboard using their proprietary electronic perception technology.The company subsequently licensed the technology to Celluon of Korea.A proposed system called the HYPERLINK /w/index.php?title=P-ISMaction=editredlink=1P-ISM combines the technology with a small HYPERLINK /wiki/Video_projectorvideo projector to create a portable computer the size of a HYPERLINK /wiki/Fountain_penfountain pen. Design A laser projection keyboard used with a tablet. A HYPERLINK /wiki/Laser_video_projectorlaser or HYPERLINK /wiki/Video_projectorbeamer projects visible virtual keyboard onto level surface. A HYPERLINK /wiki/Sensor_(technology)sensor or camera in the projector picks up HYPERLINK /wiki/Human_fingerfingermovementsHYPERLINK /wiki/Projection_keyboard#cite_note-EP0554492-1[1] Softw