Optical encoder and control method thereof

Abstract

An optical encoder with modified pattern and control method for higher precision is provided. The optical encoder comprises a light emitting element, a code wheel, a grating disk and a light sensing element. The code wheel is disposed at one side of the light emitting element and comprises a plurality of tracks configured in the annular formation periodically. The grating disk is disposed at one side of the code wheel opposite to the light emitting element, and comprises a plurality of patterns parallel with each other. The light sensing element is disposed at one side of the grating disk opposite to the code wheel, and comprises a control unit and a plurality of sensing units corresponding to the patterns. The light sensing element comprises a plurality of sensing arrays wherein each of the sensing arrays comprises at least two sensing units, and the sensing units with identical space are connected with the same transmission line.

Dependencies are inferred from the claim text.