Teaching system employing binary light-sensitive responders
Apparatus using a light sensing system for sensing time modulated information from a light emitting device Patent #: 4329684
ApplicationNo. 06/589629 filed on 03/15/1984
US Classes:348/473, Including additional information345/207Light detection means (e.g., with photodetector)
ExaminersPrimary: Chin, Tommy P.
Assistant: Harvey, David E.
Attorney, Agent or Firm
International ClassesG06F 3/00 (20060101)
H04H 9/00 (20060101)
H04M 9/00 (20060101)
H04N 17/04 (20060101)
G06K 7/10 (20060101)
AbstractA channel identifying rolling bar code, transmitted with a television broadcast signal, is displayed at a selected location on the receiving television screen. An apparatus is secured to the television set to view the rolling bar code to identify the channel being transmitted and process that information as necessary to detect the periods of time that different channels are received by the particular set. That information is stored in an internal memory for eventual use by a central processor.