US Patent No: 6,642,687
Number of patents in Portfolio can not be more than 2000
Stepping-motor driving device and lens driving device using the same
Stats
-
Nov 4, 2003
Issued date -
Sep 4, 2001
filing date -
09/944,068
serial no -
In Force
status
Importance
Loading Importance Indicators...
Abstract
A driving device for a stepping motor capable of providing positioning accuracy with low power consumption includes elements such as a setting circuit for setting the number of driving steps of the stepping motor, a storage circuit for storing a first driving table containing energizing amount data for each step at which the stepping motor is energized and driven in a micro-step manner, and a second driving table containing energizing amount data different in value from the first driving table, and a driving circuit for energizing the stepping motor during the driving steps set in number by said setting circuit according to the energizing amount data of the first or second driving table, and the and the driving circuit selects either the first or second driving table according to the number of remaining steps to be driven.
Loading the Abstract Image...
First Claim
Related Publications
Loading Related Publications...
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
|
|
|||
| 4,751,445 Stepping motor control device | 9 | 1987 | |
| 5,283,604 Camera which reads information from a stabilized film cartridge | 7 | 1991 | |
| 5,245,372 Camera using a film with a magnetic memory portion with a two-speed film transporting feature | 15 | 1992 | |
| 5,384,506 Stepper motor | 38 | 1993 | |
| 5,899,591 Film transporting system for camera using three different transport speeds | 4 | 1993 | |
| 5,353,078 Camera having a magnetic recording device | 18 | 1994 | |
| 5,742,858 Camera having magnetic head | 3 | 1994 | |
| 5,481,323 Camera using film with magnetic storage section | 8 | 1994 | |
| 6,049,677 Camera having magnetic signal reproducing circuit with adjustable gain amplifier | 5 | 1994 | |
| 5,572,105 Stepping motor control method including varying the number of split sections in one step drive period of a stepping motor | 9 | 1994 | |
| 5,563,673 Camera | 5 | 1995 | |
| 5,729,780 Camera with magnetic head prevented from contacting film during image recording | 1 | 1996 | |
| 5,831,356 Compact cylindrical stepping motor and advancing device | 41 | 1997 | |
| 5,925,945 Compact motor with enhanced workability | 20 | 1997 | |
| 5,969,453 Motor | 17 | 1998 | |
| 5,973,425 Motor | 19 | 1998 | |
| 5,945,753 Motor | 21 | 1998 | |
| 6,081,053 Motor | 22 | 1998 | |
| 6,046,517 Electric motor | 14 | 1998 | |
| 6,157,107 Motor with magnetic stator poles inside and outside the rotor magnet | 15 | 1999 | |
| 6,172,440 Motor | 19 | 1999 | |
|
|
|||
| 4,641,073 Stepper motor control system | 8 | 1983 | |
| 5,084,661 Position control system for information storage system | 21 | 1987 | |
|
|
|||
| 4,855,660 Microstepping of an unipolar stepping motor | 20 | 1988 | |
| 4,929,879 Microstepping of an unipolar stepping motor | 24 | 1989 | |
|
|
|||
| 4,443,746 Control circuit for stepping motor | 11 | 1981 | |
|
|
|||
| 6,016,044 Open-loop step motor control system | 25 | 1995 | |
|
|
|||
| 5,198,909 Driving apparatus and method for scanning system for use in image recording apparatus | 30 | 1990 | |
|
|
|||
| 6,208,107 Use of digital current ramping to reduce audible noise in stepper motor | 34 | 1999 | |
|
|
|||
| 6,118,963 Method and apparatus for eliminating positional deviations of a photosensitive drum driven by a stepping motor which is by half steps | 8 | 1998 | |
|
|
|||
| 5,942,872 Method of controlling a stepping motor | 8 | 1998 | |
|
|
|||
| 4,518,907 Digital motor control method and means | 18 | 1983 | |
|
|
|||
| 4,455,520 Method and means for stable operation of a synchronous motor | 11 | 1981 | |
|
|
|||
| 5,982,134 Method and apparatus for driving a stepping motor | 7 | 1998 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 4, 2015 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |