Light pen detection system
Multi-color video display systems using more than one signal source
Method and apparatus for displaying radar video registered with computer generated data on a television monitor
Apparatus and method for automatic coloration and/or shading of images
Alphanumeric terminal having an optoelectric converter and an associated mono-pulse generating circuit
System and method for painting images by synthetic color signal generation and control
Color display apparatus Patent #: 4232311
ApplicationNo. 06/108647 filed on 12/31/1979
US Classes:345/180, Light pen for CRT display345/13Data responsive deflection control
ExaminersPrimary: Curtis, Marshall M.
Attorney, Agent or Firm
International ClassesG01S 7/52 (20060101)
G06F 3/033 (20060101)
Foreign Application Priority Data1979-01-31 AT
AbstractA light pen directed toward an area of a fluorescent screen controls a pulse generator, which causes said area to be brightened and also causes a defined target mark to be displayed. The coordinates of the target mark may be ascertained from the instantaneous deflecting voltages which control the electron beam and may be indicated or stored or supplied to a computer for evaluation. In such computer, the coordinates of a plurality of target marks may be used to ascertain the length of curves and contours or the areas of regions which have been circumscribed with the light pen. Various possible uses and methods of evaluation are described as well as equipment for carrying out the method.