Methods and systems for control of film transport
AssigneeIMAX Corporation
InventorsIgal Roytblat, Robert F. Frith, Alexander Mezhibovsky
Life of this patent
Estimating the term…
Abstract
Methods and systems of controlling transport of film are disclosed. In one embodiment, a method of controlling a supply platter motor in a no-rewind film transport system, comprises receiving take-up platter control signal information from a take-up platter controller, processing the take-up platter control signal information, and controlling the supply platter motor based at least in part on the processed take-up platter control signal information.
Claims20
A method of controlling a supply platter motor in a no-rewind film transport system, comprising:
- receiving take-up platter control signal information from a take-up platter controller;
- processing the take-up platter control signal information;
- and
- controlling the supply platter motor based at least in part on the processed take-up platter control signal information.
A method of improving supply platter motion in a no-rewind film transport system, comprising:
- determining a time taken for a lead-in film position on a supply platter to transition predefined limits of supply platter acceleration or deceleration based at least in part on supply platter film lead-in position feedback;
- determining a speed error between a supply platter reference speed signal and a supply platter speed control signal at the time of the transition;
- determining a corrected supply platter speed control signal based at least in part on the speed error signal and the supply platter reference speed signal;
- and
- controlling the supply platter based at least in part on the corrected supply platter speed control signal.
A no-rewind film transport system, comprising:
- a take-up platter controlled by a take-up platter motor;
- a take-up platter controller capable of controlling the take-up platter motor through take-up platter control signals;
- a processor capable of receiving and processing the take-up platter control signals;
- a supply platter controlled by a supply platter motor;
- a supply platter controller capable of receiving the processed take-up platter control signals and controlling the supply platter motor at least in part with the take-up platter control signals.
Dependencies are inferred from the claim text.