Optical detection device and related turntable watch

An optical detection device of detecting a pointer position of a turntable watch, the optical detection device comprising:

• an optical emitter adapted to emit an optical detecting signal;
• an optical receiver disposed on a substrate distant from a holder with a plurality of pointers of the turntable watch and adapted to receive an optical reflecting signal passing through the holder, wherein the optical detecting signal is projected onto one of the pointers to generate the optical reflecting signal;
• and
• a processor electrically connected to the optical emitter and the optical receiver, and adapted to compare variation in physical quantity of several optical reflecting signals respectively received at different time with several predefined conditions for identifying the optical reflecting signals are aborted or used to determine the pointer is located above the optical receiver and distinguish one pointer from another pointer via the optical reflecting signals received by the same optical receiver.

A turntable watch, comprising:

• a casing where inside a substrate, a plurality of pointers and a holder are disposed, the substrate being distant from the holder, the pointers being movably disposed on the holder;
• a covering component disposed on the casing and adapted to cover the pointers, the covering component comprising:
• a transparent body;
• and
• a light rejecting layer disposed on a first surface of the transparent body to face the outside of the casing for rejecting an ambient optical signal with a specific wavelength;
• and
• an optical detection device of detecting position of the pointers, the optical detection device comprising:
• an optical emitter adapted to emit an optical detecting signal with the specific wavelength;
• an optical receiver disposed on the substrate and adapted to receive an optical reflecting signal passing through the holder, wherein the optical detecting signal is projected onto one of the pointers to generate the optical reflecting signal;
• and
• a processor electrically connected to the optical receiver, and adapted to compare the optical reflecting signal with several predefined conditions for determining whether the pointer is located above the optical receiver and distinguish one pointer from another pointer via the optical reflecting signals received by the same optical receiver.