Patent ID: 6038523
Filing Date: 2000-03-14
Classification: G01D,G04C

Abstract:
An electronic apparatus comprising:a position detecting apparatus having an encoder plate having a plurality of detectable identification marks forming a single series of marks disposed thereon;an identification-mark detecting means disposed in facing relationship with said encoder plate for detecting a plurality of said identification marks disposed on said encoder plate, a sampling code being generated by sequentially detecting said identification marks at a plurality of sampling points along said encoder plate to determine whether said identification marks are present, said detecting being performed while said encoder plate and said identification-mark detecting apparatus are in relative motion; andan identification means for identifying an indicated position of said encoder plate according to said sampling code, said identification means having identification-mark determination means for outputting, at each of said sampling points, at least either a first data indicating that said identification mark is present and a second data indicating that no identification mark is present, or a third data indicating that the presence of said identification mark is undeterminable; and a decoder for decoding said sampling code formed by any combination of said first data, and said second data and said third data being output from said identification-mark determination apparatus to identify said indicated position of said encoder plate.