Drive device

• US 4,779,032 A
• Filed: 03/31/1987
• Issued: 10/18/1988
• Est. Priority Date: 03/31/1986
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Fukushima, Nobuo, Sakaegi, Yuji
• Primary Examiner(s): Shoop, Jr., William M.
• Assistant Examiner(s): BERGMANN, SAUL
• Application Number:
  US07/033,024
• Time in Patent Office: 567 Days
• Field of Search: 318/685, 318/696, 360/72, 360/78, 358/29
• US Class Current: 386/222
• CPC Class Codes: G11B 19/20 Driving; Starting; Stopping; Control thereof
• CPC Class Codes: G11B 31/00 Arrangements for the associated working of recording or reproducing apparatus with related apparatus with cameras or projectors G03B31/00 ; recording/reproducing of music for electrophonic musical instruments G10H1/0033; automatic arrangements for answering calls or for recording messages for absent subscribers H04M1/64; telephonic communication systems adapted for combination with dictation recording and playback systems H04M11/10; connection of TV recorder with other related apparatus, e.g. TV camera or receiver, in which the TV signal is significantly involved H04N, e.g. H04N23/00, H04N5/765; combination of radio or TV with other apparatus, e.g. with vehicles H05K11/00
• CPC Class Codes: H04N 5/772 the recording apparatus and the television camera being placed in the same enclosure
• CPC Class Codes: H04N 9/793 for controlling the level of the chrominance signal, e.g. by means of automatic chroma control circuits

Abstract

A recording apparatus having a recording head for recording video signals on a magnetic disc as the disc rotates, comprises a servo motor, a circuit for generating a feedback signal representing the rotating state of the servo motor, a head moving member for changing over the recording position of the recording head relative to the magnetic disc, and a control circuit for performing a first sequence of controlling the rotating state of the servo motor in response to the feedback signal and a second sequence of controlling the moving state of the head moving member time-dividedly in response to generation of the feedback signal, so that the apparatus is constructed without the necessity of using a standard timing generating source solely used for controlling the movement of the head.

Claims

1. An apparatus comprising:

(a) rotation drive means for rotation of a recording medium;

(b) generating means for generating a signal repressenting the rotating state of said rotation drive means a plurality of times for one revolution;

(c) recording head means for recording information on said recording medium;

(d) recording head moving means for changing the position of said recording head means relative to said recording medium; and

(e) control means for time-serially controlling said recording head moving means and said rotation drive means in in response to said signal generated by said generating means.

2. An apparatus according to claim 1, wherein said rotation drive means includes a servo motor and wherein said control means detects the interval of such signals generated by said generating means to control said servo motor so as to rotate said servo motor at a constant speed.

3. An apparatus according to claim 1, wherein said recording head moving means includes a step motor driven by said control means.

4. An apparatus according to claim 1, wherein said control means is responsive to said signal generated by said generating means to successively control said rotation drive means and said recording head moving means.

5. An image pick-up apparatus comprising:

(a) rotation drive means for rotation of a member;

(b) generating means for generating a signal representing the rotating state of said rotation drive means;

(c) detecting means for detecting color temperature information of said image; and

(d) control means responsive to each said signal generated by said generating means for time-serially controlling both said rotation drive means and said detecting means.

6. An apparatus according to claim 5, wherein said member is a recording medium.

7. An apparatus according to claim 5, further comprising:

converting means for converting an image to an electrical signal and

processing means for processing the electrical signal converted by said converting means in response to the color temperature detected by said detecting means.

8. An apparatus according to claim 7, wherein said control means controls both said rotation drive means and the timing of output of the color temperature information from said detecting means to said processing means in response to said signal generated by said generating means.

9. An apparatus according to claim 5, wherein said generating means includes means for generating a prescribed number of pulse signals during one revolution of said rotation drive means.

10. An apparatus according to claim 9, wherein said control means operates said rotation drive means in response to the interval of said pulse signals.

11. An apparatus according to claim 5, wherein said detecting means includes:

(a) a first sensor responsive to a light bundle of a first wavelength;

(b) a second sensor responsive to a light bundle of a second wavelength; and

(c) diffusing means provided in front of said first and second sensors.

12. A reproducing apparatus comprising:

(a) rotation drive means for rotation of a member;

(b) generating means for generating a signal representing the rotating state of said rotation drive means;

(c) reproducing means for reproducing a signal recorded on a recording medium;

(d) displacing means for changing the position of said reproducing means relative to said medium; and

(e) control means for time-serially controlling both said rotation drive means and said displacing means in response to said signal generated by said generating means.

13. An apparatus according to claim 12, wherein said member is said recording medium.

14. An apparatus according to claim 12, further comprising:

detecting means for detecting the level of the signal reproduced by said reproducing means, and wherein said control means controls said displacing means in such a manner that the level of said detected signal becomes a prescribed value.

15. An apparatus according to claim 12, wherein said generating means includes means for generating a prescribed number of pulse signals during one revolution of said rotation drive means.

16. An apparatus according to claim 15, wherein said control means operates said rotation drive means in response to the interval of said pulse signals.