FR2753809A1 - DEVICE AND METHOD FOR MOVING AN APS-TYPE CAMERA FILM - Google Patents

Abstract

The present invention relates to a device for moving an APS type camera film having a film perforation detection unit (10) for detecting a perforation, and outputting a detected perforation signal. A control (20) for measuring the time taken to detect the next perforation after detection of a perforation during film movement when a winding error occurs or a battery is changed after film movement, to compare the time with a determined value, and producing a signal to stop the movement at a position where the detection of the next perforation is finished when the time is less than or equal to the determined value. A film moving unit (30) obeys said control signal. During a winding error, the device can expose an object at the next view or at a view located after a view has been skipped.

Description

The present invention relates to a device and method for moving

film in a camera

  APS type photographic system (Advanced Photographic System).

  More particularly, the present invention con-

  identifies a device and method for moving a film

  wanders through an APS type camera that detects

  detects a perforation formed in the film, compares the signals emitted by photosensitive detectors used to detect the perforations, and acts to move the

film.

  Generally speaking, a camera

  uses 35 mm film, as shown in the figure

  gure 1, on which perforations are formed on both sides. A view of the film has eight perforations

  on each side, and the loading and moving operation

  film is ordered according to the number

of perforations detected.

  In a conventional camera, when

  that a trigger button is operated by a user

  a view of the film is exposed to an object. After shooting, the film is moved through the camera and perforations are detected by

  perforation detectors and counted by a counter.

  When the counter has a total of eight perforations, the command determines that the movement of the film is complete and stops the movement of the film in order

  the following view is available for shooting.

  However, since the view of the film is de-

  ended with the number of perforations counted, views

  exposed may overlap if an error occurs during

  during the film shifting operation. In addition,

  when an external malfunction stops the movement

  film cement, the motor is overloaded. By

  Therefore, because the order determines that the film

  cule is fully exposed, the control acts to re-

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  hoe the film even if the film is not complete-

ment exposed.

  In an APS type camera having various functions corresponding to user instructions, a film other than mm type film is used. As shown in Figure 2, a

  APS type camera film

  only two perforations which are formed on one side of the film. The first perforation is formed at the level

  a starting position to indicate the starting position

  part of the view and the second perforation is formed by a

  end position to indicate the end position of the view.

  It would be desirable to provide a camera

  of the improved APS type which avoids the problems described above

above.

  Given the above description, a goal

  of the present invention is to provide a device and method for moving film in an apparatus

  APS type photographic camera to a correct position.

  In order to achieve the above object, the present invention includes film perforation detection means for detecting a perforation formed in a film, and for outputting a signal corresponding to a detected perforation. The present invention also includes control means for measuring a period of time until the next perforation is detected after a perforation has been detected during movement of the film when a winding error occurs or

  that a battery is changed after moving the film

  calculates, to compare the time period with a given value

  finished, and to produce a command signal to stop

  ter the displacement of the film at a position

  to which the detection of the next perforation is complete

  mined after a perforation was detected when the

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  time is less than or equal to the determined value. Finally, the present invention includes film moving means for moving film in accordance

said control signal.

  In another aspect of the present invention, a

  method is provided to control the move operation

  film of an APS type camera.

  The method includes the steps of determining whether or not a winding error has occurred or a

  battery has been changed, measure a period of time until

  until the next hole is detected after a hole has been detected during movement

  of the film, when a winding error is observed

  bare or that a battery was changed while traveling

  of the film, compare the time period with a

  their determined, and produce a control signal for ar-

  stop moving the film to a position at

  which the detection of the next perforation is finished

  born after a perforation was detected, when the

  time is less than or equal to the determined value.

  In order to achieve the above object, another embodiment of the present invention includes film perforation detection means for detecting a perforation formed in a film, and for outputting a signal in accordance with a detected perforation. The current

  invention also includes control means for measuring

  a period of time at which a perfora-

  tion is not detected after a winding error has occurred or a battery has been changed during a

  displacement of the film and a period of time at the

  calf from which a perforation is not detected after a first counted down time, and define the times as

  first time counted and second time counted, respectively-

  ment, to compare the first counted time with the second

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  counted time, and to produce a control signal for

  stop the movement of the film at a po-

  sition at which a second perforation detection is finished when the first counted time is greater than or equal to the second counted time. Finally, the present invention includes film moving means for moving

  a film according to said control signal.

  In another aspect of the present invention, a

  method is provided to control the move operation

  film of an APS type camera.

  The method includes the steps of measuring a

  time period at which a perforation is not

  not detected after a winding error is monitored

  bare or that a battery was changed during the move-

  film, set the time as the first counted time, measure a period of time at

  which a perforation is not detected after a pre-

  first time counted, set time as second

  counted time, compare the first counted time with the se-

  cond counted time, and produce a control signal for

  stop the movement of the film at a po-

  sition at which a perforation detection is finished when the first time counted is greater than or equal to

second time counted.

  The above purposes and characteristics of the pre-

  sente invention will appear more clearly on reading

  of the following description of the preferred embodiment

  tion, made with reference to the accompanying drawings, on the-

  which: - Figure 1 is a diagram of a film of mm of the prior art, - Figure 2 is a diagram of film used in a camera of the APS type,

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  - Figure 3 is a block diagram of a dis-

  positive for moving a film in accordance with the present invention, - Figure 4 is a detailed circuit diagram showing a film perforation detection unit for detecting perforations of a film, - Figure 5 represents a film perforation unit film perforation detection according to the present invention, - Figure 6 shows an output signal of a film perforation detection unit according to a first embodiment of the present invention, - Figure 7 is a flowchart showing a

  method of moving camera film

  that of the APS type according to the embodiment of the present invention, - Figure 8 represents an output signal of a film perforation detection part according to the second embodiment of the present invention, - Figure 9 is a flow chart representing a

  method of moving a film in accordance with a

  cond embodiment of the present invention.

  The present invention will be described in detail.

  referring to the accompanying drawings.

  Figure 3 is a flow diagram of a device

  for moving a film according to the present invention.

  As shown in Figure 3, a device for moving

  cer a film located in a camera of the APS type according to the present invention has a

  film perforation detection unit 10, a

  20 and a film moving unit 30.

  As shown in Figure 5, the unit 10 below

  film perforation detection top has a pre-

  first detection part 11 and a second detection part

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  tection 13 which are spaced by a predetermined distance

  in accordance with the film perforations formed.

  As shown in FIG. 4, the first detection part 11 comprises a photocoupler 111 having a light-emitting diode (LED) D1 and a phototransistor Tl and a signal creation part 113 having a

  transistor T2 and resistors R2 and R3. The second par-

  detection tie 13 comprises a photocoupler 131 having an LED D2 and a phototransistor T3 and a signal creation part 133 having a transistor T4 and resistors R5

and R6.

  The signal creation parts 113 and 133

  generate an electrical signal based on a signal

  received from photocouplers 111 and 131, respectively-

  is lying. When the LED Dl emits light through a per-

  drilling, phototransistor T1 receives light through

  the perforation. Therefore, the T1 phototransistor of-

  comes on and then the transistor T2 becomes consequently

quence passing.

  However, if the LED D1 emits light on the surface of the film, the phototransistor T1 does not receive light because the light is reflected by the surface of the film. So the phototransistor Tl and the

  transistor T2 does not turn on.

  Because the transistor T2 is turned on when a perforation is detected by the photocoupler 111, the signal creation part 113 emits a low level signal L. However, if the transistor T2 is not detected by the photocoupler 111, the part for creating

  signals 113 emits a high level H signal.

  The control 20 is connected to the output terminal of the film perforation detection unit 10, and

  controls the operation of moving the conformal film

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  even to the signal from the per-

film drilling 10.

  The film moving unit 30 is con-

  connected to the output terminal of control 20 and moves the film. The operation of the device according to the present invention is as follows: with reference to FIG. 7, when a trigger button is actuated and a view is taken, the control 20 causes the film to be rolled up. The film moving unit 30 further acts to move

  the film in the winding direction (step S10).

  At this time, the perforation detection unit

  10 detects a hole and then sends a

  generally pulsed towards control 20 in response to light passing through the perforation of the film (step

S120).

  In the above, when the film is de-

  placed, the pulsed signal which is emitted by the detection unit

  film perforation 10 changes state. That is

  say that when the film perforation detection unit 10 emits light through a perforation, the film perforation detection unit 10 receives

a light via the perforation.

  However, when the perfo-

  film ration 10 emits light on the surface of the film, when a perforation is not formed,

  the film perforation detection unit 10 does not

  no light due to the fact that the light is reflected

by the surface of the film.

  Therefore, the signal from the detection unit

  film perforation detection 10 changes state of

  depending on whether the perfo-

  film ration 10 receives light or not.

8 2753809

  That is to say that if the photodiode Dl emits a lu-

  through a perforation, the phototransistor T1 de-

  comes on and then the transistor T2 also turns on. Thus, a low level signal L is sent to control 20.

  However, if the light from the photo-

  diode Dl is not emitted through a perforation but is emitted on the surface of the film, the phototransistor Tl and the transistor T2 do not turn on. So a

  high level signal H is sent to control 20.

  After a film view has been exposed, the

  command 20 moves the film to move the exposure view

  and then command 20 determines whether or not a winding error has occurred depending on the signal from the film perforation detection unit

  10. Also, command 20 determines whether or not the bat-

  laugh that operates the camera has been changed

(step S130).

  For example, when the device for detecting

  film drilling 10 does not emit any signal or when the

  output signals are not changed while the com-

  command 10 acts to move the film, control 20 determines whether a winding error has occurred in

  which the film was not moved normally.

  Also, if the power is reset again, the command

  determines if the user has changed the battery.

  When a winding error occurs or

  a battery is changed, control 20 controls the

  film placement in accordance with a signal from

  the film perforation detection unit 10.

  In the present invention, the control 20 comprises

  requires movement of the film in accordance with a

  general emitted by the first detection part 11. Cepen-

9 2753809

  dant, the second detection part 13 can also be used.

  When a winding error occurs or when

  that the battery is changed, the command 20 counts down a period of time at which a state N has been maintained after a signal L has been emitted by the

  film perforation detection 10. After the

  command has counted down the period of time, the command 20

  ends time period as first time Tl

(steps S140 and S150).

  Then, to determine whether or not the

  placement of the exposed view is completed, the command 20 compares the first time T1 with the maximum value determined

(step S160).

  The determined maximum value is already predetermined.

  born over a period of time during which the perfora-

  tion is not detected in period bl, as shown

in figure 6.

  If the time Tl is less than or equal to the maximum value determined, the command 20 stops the movement of

the film of an exposed view.

  In other words, when the first time T1 is less than or equal to the maximum value determined, the command 20 stops when a signal L emitted by the unit of

  film perforation detection 10 is changed if

  gnal H, after the film perforation detection unit 10 has sent a signal L. However, if the first time Tl is greater than the determined maximum value, the command 20 is returned to

step S140.

  Consequently, the command 20 counts down a

  time period until a signal L is emitted by

  the film perforation detection unit 10

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  even to a perforation detected after an H signal has

been issued.

  After the control 20 has counted down the time period, the control 20 again defines the time period as the first time T1 (steps S140 and S150). Then, the command 20 compares the first time T1 with the maximum value determined above (step

S160).

  If the first beat T1 is less than or equal to the

  maximum value determined, command 20 stops moving

  cementation of the film at unexposed view.

  Thus, the command 20 stops the command signal sent

  to the film moving unit 30.

  Therefore, as shown in Figure 6, when a winding error occurs or a battery is changed during the first period of travel Ai

  film, the film move operation stops

crest at position II.

  However, when the winding error occurs

  comes or when the battery is changed during the second

  period B1 of the film displacement, the operation of

  film placement stops at position II1.

  Therefore, the filmstrip view is placed at the starting position of the next view after a

sight has been skipped.

  However, if the pel-

  licule is executed normally without an er-

  or that the battery is changed, the

  command 20 determines whether or not the film perforation detection unit 10 emits a signal L in accordance with the detection of the next perforation and the signal L is changed to signal H. 11il 2753809 That is to say that in position II, the control stops transmitting a control signal to the control unit

moving film 30.

  Therefore, when the move operation-

  film run is performed normally, the film view is set to the start position of

  the view following the exposed view and a subject is exposed.

  When a winding error occurs or a battery is changed while moving the film, a single view cannot be used, but

  the other view can be used normally.

  Second preferred embodiments of the present invention will now be described in detail.

  referring to the accompanying drawings.

  FIG. 8 represents a signal emitted by a

* film perforation detection unit according to se-

  cond embodiment of the present invention, the fi

  gure 9 being a flowchart representing a process for

  move the film according to the second embodiment

sation of the present invention.

  A device for moving a film according to the second embodiment of the present invention is

  the same as for the first embodiment of the pre-

invention.

  As shown in Fig. 9, after a film view has been exposed, the controller 20 issues a control signal to the film moving unit

  to move the exposed view of filmstrip.

  When the film perforation detection unit 10 emits an H signal, the controller 20 counts down the period of time during which the H state is maintained

(steps S310 and S320).

12 2753809

  Afterwards, command 20 determines whether or not a winding error has occurred or a battery has been

changed (step S330).

  If a winding error has occurred or if the battery has been changed, control 20 counts down the period of time at which an H state has been maintained after the winding error has occurred or a battery has been changed. After counting the time period, the command 20 defines the time period as

  that first time counted (step S340).

  After command 20 has counted down first

  time counted, command 20 counts down the time during the

  which film perforation detection unit 10

  emits an H signal after the first counted time, and the

  command 20 defines this period of time as the second counted time (step S350). That is, the controller 20 separately counts the period of time during which the film perforation detection unit 10 emits a signal H, after and before detection of a perforation, after the error of winding has occurred or the battery

has been changed.

  After command 20 has counted down first

  counted time and the second counted time, command 20 includes

  counter the first counted time to the second counted time (step

S360).

  If command 20 determines that the first counted time is greater than the second counted time, command 20

  determines that the film has been moved normally.

  Therefore, the controller 20 stops the film moving operation at a position I2 to

  which a signal L is changed to signal H after a

  general L has been issued by the perforation detection unit

of film 10 (step S370).

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  For example, in Figure 8, when the film

  cule is moved normally, the first counted time is the total value Ta2 + Tb2 and the second counted time is the value Tc2. Consequently, since the total value Ta2 + Tb2 is greater than or equal to Tc2 the film shifting operation stops at the position at

  which a signal L is changed to signal H after a

  general L has been issued by the perforation detection unit

film 10.

  However, when the first counted time is less than the second counted time, the command 20 defines the second counted time as being the first counted time, and the command 20 counts down a period of time until the perforation detection unit of film 10 emits a signal H. Thus, the control 20 defines this period of time as being the new second counted time, and the

  command 20 controls the film moving operation

  runs until the first beat is greater than the se-

time cond. (step S380).

  When the first counted time is greater than the second counted time, the control 20 stops the film moving operation at the position I2 to

  which a signal L emitted by the detection unit

  film drilling 10 is changed to signal H. As re-

  presented in figure 8, in the case where an error of

  bearing has occurred or a battery has been changed

  during the first block A2, the command 20 defines the first

  1st time counted and the second time counted as

Ta2 + Tb2 and Tc2, respectively.

  Consequently, since the first counted time is greater than or equal to the second counted time, the control 20 stops the film moving operation at the position I2 at which the next signal L

14 2753809

  emitted by the film perforation detection unit is changed to signal H. In the event that a winding error occurs or a battery is changed during the second block B2, the first time counted is less than the second time counted

  the fact that the first time counted is Tb2 and that the se-

  cond counted time is Tc2 of the third block C2. At this time

  ment, the second block B2 is smaller than the third

block C2.

  Thus, the command 20 defines the second time counted as a new first time counted Tc2, and

  then command 20 defines as second time comp-

  tee the period of time at which the unit de-

  film perforation detection 10 emits a next H signal. However, the first time counted is smaller

  that the second time because the first time counted from-

  comes Tc2 and the second counted time becomes Td2. Consequently, command 20 defines the second counted time Td2 as being the first counted time, and command 20

  counts down a period of time until the timer unit

  film perforation detection 10 emits another if-

  gnal H, and then command 20 defines this period of

  time as the second time counted.

  Consequently, since the first counted time and the second counted time must be Td2 and Te2 respectively, the first counted time is greater than

  the second time counted. Therefore, the command 20 ar-

  stops the film moving operation at a position II2 at which the signal emitted by the

  film perforation detection 10 is changed if

  general H. Also, in the case where a winding error

  occurred or a battery was changed during the third

  sth time period C2, the first time counted is in-

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  lower than the second beat counted from the fact that the first beat

  counted must be Tc2 and the second counted time is Td2.

  Consequently, the command 20 defines as first counted time the second counted time T2, and then defines as second counted time the time until

  that the film perforation detection unit

  cule 10 emits another signal H. Consequently, since the first counted time is Td2 and the second counted time is Te2, the first counted time is greater than the second counted time. By

  Consequently, the control 20 stops the movement of the pel-

  moves to position II2 at which the signal emitted by the film perforation detection unit is changed to signal H. Also, in the case where a winding error

  occurred or a battery was changed during the

  third block D2, the first counted time is greater than the second counted time because the first counted time is

  Td2 and that the second time counted is Te2. So the com-

  command 20 stops the film moving operation at position II2 at which the signal from the film perforation detection unit 10 is changed to signal H. In accordance with preferred embodiments of the present invention relating to a APS type camera, although a winding error occurs or a battery is changed, an object is exposed at the level

  of a view according to the view exposed or at the level of a view if-

  killed after a view has been skipped. Therefore, in the present invention, since all views of the film are liable to be exposed, film can be used very effectively. Although we have represented and described what is now considered to be

  being the preferred embodiments of the present in-

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  It is obvious to those skilled in the art that various

  changes and modifications can be easily made

  without departing from the scope and spirit of this

  invention as defined by claims an-

attached.

17 2753809

Claims (8)

  1. Device for moving a film of an APS type photographic camera, characterized in that it comprises: film perforation detection means (10) for detecting a perforation formed in a film, and for emitting a signal according to a detected perforation,   control means (20) for measuring a   Time period until the next hole is detected after a hole has been detected during film movement when a winding error occurs or a battery is changed after film movement, to compare the period of time with a determined value, and to produce a control signal to stop the movement of the film at a position at which detection of the next hole is completed after a hole has been detected   when the time is less than or equal to the determined value   born, and film displacement means (30) for   move a film in accordance with said com signal order.   2. Device according to claim 1, character-   rised in that the control means (20) comprise means for producing a control signal to stop the movement of the film at a position at which the next perforation detection is finished when the winding error n did not occur or that the battery has not been changed.   3. A film displacement device of an APS type photographic camera, characterized in that it comprises: 18 2753809   film perforation detection means   cule (10) for detecting a perforation formed in a film, and for emitting a signal in accordance with a detected perforation, control means (20) for measuring a period of time at which a perforation is not   not detected after a winding error is monitored   bare or that a battery was changed during a move-   film, and a period of time at   which a perforation is not detected after a pre-   mier counted time, and define times as first counted time and second counted time respectively, for   compare the first time counted with the second time counted   tee, to produce a control signal to stop the   placement of film at a position at which the second perforation detection is finished when the first counted time is greater than or equal to the second counted time, and film displacement means (20) for   move a film in accordance with said com signal order.   4. Device according to claim 3, character-   in that the control means (20) include   means to define the second beat counted as first-   1st counted time when the first counted time is less   less than the second counted time, to measure a period of   time at which a perforation is not lost   detected, to define the time period as the second counted time, and to produce a control signal for   stop moving film at a position   tion at which a perforation detection is finished when the first counted time is greater than the second time counted. 19 2753809   5. Method for controlling the movement of a   film in an APS type camera,   characterized in that it includes the steps of: determining whether or not a winding error has occurred or a battery has been changed, measuring a period of time until a next perforation is detected after a perforation   was detected during film movement, when   a winding error occurs or a battery is changed during film movement,   compare the time period to a specific value   mined, and producing a control signal to stop film movement at a position at which the next hole detection is finished after a hole has been detected when the time   is less than or equal to the determined value.   6. Method according to claim 5, characterized in that it further comprises the steps of: producing a control signal to stop the movement of the film at a position at which the next perforation detection is finished when the winding error does not occur or when the battery is not changed.   7. Method for controlling the movement operation   ment of a film of a photographic camera of the APS type, characterized in that it comprises the steps consisting in: measuring a period of time at the level of which a perforation is not detected after a winding error either occurred or a battery was changed during film movement, set the time period as the first counted time, 2753809   measure a period of time during which a   perforation is not detected after a first time   tee, define the time period as the second counted time, compare the first counted time to the second counted time, and generate a control signal to stop the movement of the film at a position at which a perforation detection is finished when the first counted time is greater than or equal to the second counted time. 8. Method according to claim 7, characterized in that the step of comparing the first counted time with the second counted time further comprises the steps consisting in:   define the second beat counted as first-   1st counted time when the first counted time is less   after the second counted time, measure a period of time at which a perforation is not detected, and define the time period as the second counted time, and produce a command signal to stop the movement of the film at the level of a position at which a perforation detection is finished when the   first counted time is greater or second counted time.