公开(公告)号：GB2470553A

公开(公告)日：2010-12-01

申请号：GB0908899

申请日：2009-05-26

Applicant: ST MICROELECTRONICS LTD

Inventor： FINDLEY EWAN ,  BRODIE STUART

IPC: G06F3/042 ,  G06F3/0354

Abstract: A computer input optical navigation device has a radiation source capable of producing a beam of radiation; a sensor for receiving an image; and an optical element for identifying movement of the feature; wherein the optical element is formed from a single piece and includes at least one frustrated total internal reflection (F-TIR) surface. A further surface may be used to direct the reflections and beam to the sensor. The input surface may be convex, like a dome, with undulations to prevent scattered reflection. The optical element may be a plastics material such as poly methyl methacrylate (PMMA), polycarbonate, cycicyclophane copolymer). The illumination source may use a fly-eye, and the device may be used in mobile phones, remote controls or other applications requiring a small input mouse.

公开(公告)号：GB2470554A

公开(公告)日：2010-12-01

申请号：GB0908900

申请日：2009-05-26

Applicant: ST MICROELECTRONICS LTD

Inventor： BRODIE STUART ,  FINDLAY EWAN

IPC: G06F3/042 ,  G06F3/033 ,  G06F3/0354

Abstract: An optical navigation device with two main elements, an optical transmission element, which transmit light from an illumination source to a sensor via a mousing surface, and a housing unit. The optical transmission element may have an alignment shaft. Ideally the two main elements are assembled to a substrate by snap-fitting them together, rather than being affixed using an adhesive. An alignment shaft may be used to ensure that the optics are properly aligned to the substrate and the light source and sensor thereon. The device is operated by a user moving a finger over the mousing surface, which may be plastic and uses frustrated total internal reflection (FTIR). The mouse like cursor motion control device, may include a domed switch below the base, such that the optical transmission is the actuator interface to operate the switch.