GB2014808A – Motor control circuit and display device
– Google Patents
GB2014808A – Motor control circuit and display device
– Google Patents
Motor control circuit and display device
Info
Publication number
GB2014808A
GB2014808A
GB7847563A
GB7847563A
GB2014808A
GB 2014808 A
GB2014808 A
GB 2014808A
GB 7847563 A
GB7847563 A
GB 7847563A
GB 7847563 A
GB7847563 A
GB 7847563A
GB 2014808 A
GB2014808 A
GB 2014808A
Authority
GB
United Kingdom
Prior art keywords
motor
signals
control circuit
producing
display device
Prior art date
1977-12-21
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB7847563A
Other versions
GB2014808B
(en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bell and Howell Japan
Original Assignee
Bell and Howell Japan
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1977-12-21
Filing date
1978-12-07
Publication date
1979-08-30
1978-12-07
Application filed by Bell and Howell Japan
filed
Critical
Bell and Howell Japan
1979-08-30
Publication of GB2014808A
publication
Critical
patent/GB2014808A/en
1982-07-14
Application granted
granted
Critical
1982-07-14
Publication of GB2014808B
publication
Critical
patent/GB2014808B/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
G—PHYSICS
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
G03B17/00—Details of cameras or camera bodies; Accessories therefor
G03B17/18—Signals indicating condition of a camera member or suitability of light
G—PHYSICS
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
G03B3/10—Power-operated focusing
H—ELECTRICITY
H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
H02P7/03—Arrangements for regulating or controlling the speed or torque of electric DC motors for controlling the direction of rotation of DC motors
H02P7/04—Arrangements for regulating or controlling the speed or torque of electric DC motors for controlling the direction of rotation of DC motors by means of a H-bridge circuit
Abstract
A motor controller 10 emits digital command signals ABCD representative of a desired operation (e.g. start, stop, reverse) of a motor 45, which signals are passed to a decoder 20 producing driving signals a-h (preferably binary) for application to a LED indicator 30 displaying the commanded operation and to a control circuit 40 producing the desired motor operation. A logical relationship is maintained among the driving signals so that they simultaneously operate the motor 45 in accordance with the command signals and actuate the indicator 30 to accurately display motor operation. The arrangement reduces components and circuitry and is particularly applicable to the limited space in an automatically focusing camera, typical operations of whose motor are described.
GB7847563A
1977-12-21
1978-12-07
Motor control circuit and display device
Expired
GB2014808B
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
JP15296577A
JPS5485321A
(en)
1977-12-21
1977-12-21
Motor control indicator
Publications (2)
Publication Number
Publication Date
GB2014808A
true
GB2014808A
(en)
1979-08-30
GB2014808B
GB2014808B
(en)
1982-07-14
Family
ID=15552018
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB7847563A
Expired
GB2014808B
(en)
1977-12-21
1978-12-07
Motor control circuit and display device
Country Status (3)
Country
Link
JP
(1)
JPS5485321A
(en)
AT
(1)
AT375195B
(en)
GB
(1)
GB2014808B
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2234079A
(en)
*
1989-06-09
1991-01-23
Asahi Optical Co Ltd
Zoom lens camera
Families Citing this family (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
JPS5866897U
(en)
*
1981-10-30
1983-05-07
株式会社東芝
Motor variable speed inverter display device
JPS5870096U
(en)
*
1981-11-05
1983-05-12
三菱電機株式会社
Electric motor control device
JPS59129395U
(en)
*
1983-02-17
1984-08-30
株式会社富士通ゼネラル
Motor drive display circuit
JP3149109B2
(en)
*
1989-08-07
2001-03-26
富士電機株式会社
Inverter function setting and output status display method
1977
1977-12-21
JP
JP15296577A
patent/JPS5485321A/en
active
Pending
1978
1978-12-07
GB
GB7847563A
patent/GB2014808B/en
not_active
Expired
1978-12-21
AT
AT0915578A
patent/AT375195B/en
not_active
IP Right Cessation
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2234079A
(en)
*
1989-06-09
1991-01-23
Asahi Optical Co Ltd
Zoom lens camera
GB2234079B
(en)
*
1989-06-09
1993-09-15
Asahi Optical Co Ltd
Zoom lens camera
US5311230A
(en)
*
1989-06-09
1994-05-10
Asahi Kogaku Kogyo Kabushiki Kaisha
Zoom lens camera
Also Published As
Publication number
Publication date
GB2014808B
(en)
1982-07-14
AT375195B
(en)
1984-07-10
JPS5485321A
(en)
1979-07-06
ATA915578A
(en)
1983-11-15
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Legal Events
Date
Code
Title
Description
1983-07-13
PCNP
Patent ceased through non-payment of renewal fee
