Light pen input systems
Patent 5959617 Issued on September 28, 1999. Estimated Expiration Date: 
August 5, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 5, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesSingle source aiming point locator Input/output display panel with light pen Patent #: 5151688 InventorsApplicationNo. 692145 filed on 08/05/1996US Classes:345/182, Light pen for fluid matrix display panel345/184Mechanical control (e.g., rotatable knob, slider)ExaminersPrimary: Hjerpe, RichardAssistant: Tran, Henry N. Attorney, Agent or FirmForeign Patent References
International ClassG09G 005/00Foreign Application Priority Data1995-08-10 GBAbstractA light pen input system includes a light sensing device (10) having a row and column array of light sensing elements (14) over which a light pen (12) is moved to write in information, e.g. for display on a display screen, the light beam emitted by the pen producing a light spot (20) on the array which covers, and is sensed by, adjacent elements and which, with the beam directed perpendicularly to the array, is substantially non-circular in shape, having dimensions in two directions over the array which differ from one another. Rotation of the pen around its axis is then detectable, providing additional functionality. An elongated light spot, e.g. elliptical, rectangular or triangular, provides further capabilities in enabling the width of a written stroke to be varied by twisting the pen. | |
