KR100346628B1 - Device for controlling a lens barrel for zoom cameras and method thereof - Google Patents

Abstract

This invention discloses a barrel control device of a zoom camera and a method thereof. When the zoom switch for performing the zoom operation in the wide or tele direction is operated, the controller drives the barrel moving part to rotate the motor in reverse or forward direction. If the zoom switch is not operated while the barrel is being moved in the corresponding direction, the control unit stops the motor by controlling the barrel moving unit at the time when the zoom signal according to the zoom position detection output from the barrel position detecting unit is output. When the release switch is operated in this state, the controller drives the ranger to measure the subject distance, and controls the barrel moving unit to perform the focus adjustment operation according to whether the measured subject distance is short or far. This compensates for the focus error caused by backlash or the like during the zoom operation. Therefore, it is possible to simplify the zoom operation control of the zoom camera and to improve the user's zooming feeling.

Description

Barrel control device of zoom camera and its method {DEVICE FOR CONTROLLING A LENS BARREL FOR ZOOM CAMERAS AND METHOD THEREOF}

The present invention relates to a barrel control device and a method of the zoom camera, and more particularly, to a barrel control device and a method for simplifying the zoom operation of the zoom camera.

In general, a zooming method of a zoom camera is to move a lens barrel in a corresponding direction as a user moves a zoom switch mounted on the camera to a wide or wide tele.

When the user selects tele or wide operation by operating the zoom switch, the control unit drives the barrel driving integrated circuit (IC), and the barrel driving IC rotates the motor in the corresponding direction, thereby moving the lens barrel to the set position. .

At this time, the control device determines whether the barrel has been moved to the corresponding position according to an encoder outputted from an encoder whose contact point is variable in connection with the barrel, that is, a sensor for detecting the zoom position of the lens barrel. The zoom operation ends when the position is reached.

However, when moving the barrel from the wide to the tele and from the tele to the wide, the focus error occurs due to the backlash of the gears, which are mechanical parts, and the difference between the boundary and the boundary distance of the encoder.

In order to prevent such a focus error, conventionally, when performing a tele zoom operation in wide, it is determined whether the barrel is moved to the target position according to the signal output from the encoder, and then when the target position is reached, the barrel is moved toward the tele for a predetermined time. After further moving, the zoom operation ends.

However, when zooming from wide to wide, for example, shifting the focus position from 100mm to 80mm, the motor is rotated back to 75mm by rotating the motor at a focal length of 100mm, and then the motor is rotated forward again. After performing the u-turn operation of moving the barrel to the target position of 80 mm in the tele direction, the motor is further rotated for a predetermined time at the 80 mm position and then the motor is stopped.

Therefore, not only the control of the zoom operation is complicated by such a U-turn operation but also the user's feeling of zoom operation is deteriorated.

Therefore, the object of this invention is to simplify the zoom operation.

That is, it is to provide an apparatus and a method for controlling a barrel of a zoom camera to stop driving a motor as soon as a corresponding zoom position is detected without a separate operation during a zoom operation.

1 is a block diagram of a barrel control apparatus of a zoom camera according to an embodiment of the present invention.

2 is a structure and a signal waveform diagram of a barrel position detector according to an embodiment of the present invention.

3 is a flowchart of a barrel control during a zoom operation of a zoom camera according to an exemplary embodiment of the present invention.

4 is a flowchart of a barrel control during the focus adjustment operation of the zoom camera according to the embodiment of the present invention.

5 is a flowchart of a barrel control during the closing process of the zoom camera according to the embodiment of the present invention.

6A is an operation flowchart of the motor stop processing of the zoom camera according to the embodiment of the present invention.

6B is an operation flowchart of the first AF stop processing according to the embodiment of the present invention.

6C is an operation flowchart of the second AF stop processing according to the embodiment of the present invention.

In order to achieve the above object, the barrel control device of the zoom camera according to the present invention stops the motor immediately without further processing when the zoom position is detected when the zooming operation of the wide or the tele is performed. In the AF operation according to the release switch operation, focus adjustment is performed according to the subject distance to compensate for the focus error due to the backlash.

An apparatus for controlling a barrel of a zoom camera according to a feature of the present invention includes a zoom switch for selecting a zooming operation for moving a barrel in a wide direction from a wide direction to a tele direction or for moving a barrel from a tele direction to a wide direction; A release switch which is sequentially operated in the first and second release stages when the photographing operation is selected; Ranging means for measuring a subject distance; Barrel moving means for moving the barrel; A zoom pattern indicating each zoom position according to a zoom operation, an AF pattern indicating a focus position set for each zoom position to compensate for a focus error, and detecting a zoom position according to the zoom pattern in association with the barrel movement Barrel position detection means for outputting a corresponding zoom signal, detecting a focus position according to the AF pattern, and outputting a corresponding AF signal; And a means for driving the barrel moving means in a tele or wide direction when the zoom switch is operated to perform a zooming operation, and stopping the driving of the barrel moving means when the zoom switch is not operated during the zooming operation. The control means includes a control means including a means for driving the barrel moving means according to the measured subject distance to move the barrel to a focus position according to the current zoom position to compensate for a focus error . When the release switch is operated, a focus adjustment signal for performing the AF operation is output according to the subject distance, and the barrel moving means moves the barrel to the corresponding focus position according to the focus adjustment signal, thereby causing a focus error generated during the zoom operation. To compensate.

According to another aspect of the present invention, there is provided a method of controlling a barrel of a zoom camera, the method including: determining whether to select a zoom operation for moving the barrel from the wide direction to the tele direction or moving the barrel from the tele direction to the wide direction; Moving the barrel in the tele direction or the wide direction when the zoom operation is selected according to the zoom switch operation; Determining whether the zoom switch is terminated; Terminating the barrel movement when the operation of the zoom switch is terminated; Measuring a subject distance when the release switch is operated in a first release stage; And compensating for a focus error generated during the zoom operation by moving the barrel to the corresponding focus position according to the measured subject distance when the release switch is operated in the second release stage.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a structure of a barrel control apparatus of a zoom camera according to an embodiment of the present invention, and FIG. 2 shows a structure and signal waveform of a barrel position detector according to an embodiment of the present invention.

As shown in FIG. 1, the apparatus for controlling a barrel of a zoom camera according to an exemplary embodiment of the present invention includes a distance measuring unit 10, a light metering unit 20, a barrel position detecting unit 30, a main switch SW1, and a release switch. (SW2), the tele switch (SW31) and wide switch (SW32) for the zoom operation, the control unit 40 connected to the output terminal thereof, and the barrel moving unit (50) connected to the output terminal of the control unit 40 And a display unit 60 and a shutter unit 70.

The ranger 10 measures the distance between the camera and the subject, and the photometer 20 measures the luminance of the subject. Metering unit 10 and the light metering unit 20 is a known technique, so a detailed description thereof will be omitted.

As shown in FIG. 2, the barrel position detector 30 includes a pattern portion 31 including a ground pattern 311, a close pattern 315, a zoom pattern 313, and an AF pattern 317. The pattern detecting unit 33 is disposed in contact with each pattern of the pattern unit 31 as the barrel moves and outputs an electrical close signal A, a zoom signal B, and an AF signal C, respectively.

The zoom pattern 313 is a pattern indicating each zoom position in the zoom operation in the tele direction or the wide direction. The close pattern 315 is a pattern indicating a close position where the barrel is stored in the camera. The AF pattern 317 is a pattern representing each focus position for focusing when the subject distance is farther than the reference distance (for example, 3.2 m) and focusing when the subject distance is nearer than the reference distance. Each pattern 311, 313, 315, 317 is made of a conductor. As shown in FIG. 2, the zoom pattern 313 and the AF pattern 317 are formed at a predetermined interval so that the conductor pattern is detected at each zoom position or focus position.

In the embodiment of the present invention, the position where the AF pattern 317 indicating the predetermined focus position starts is the focus position for focusing when the subject distance is far, and the position where the AF pattern 317 ends is the subject distance. Is the focal position for focusing when is near.

The pattern detecting unit 33 according to the embodiment of the present invention is composed of a brush coupled to one surface of the barrel moving unit 50, one terminal of the brush is in contact with the ground pattern 311, and the other terminal is connected to the barrel. By moving in the optical axis direction, the close pattern 315, the zoom pattern 313, and the AF pattern 317 are disposed so as to be selectively contacted.

Therefore, when the barrel is moved according to the driving of the motor M, the pattern detecting unit is configured as the other terminal selectively contacts each pattern 313, 315, and 317 while one terminal of the brush is in contact with the ground pattern 311. Numeral 33 outputs a low level or high level signal. For example, in the embodiment of the present invention, when the brush, which is the pattern detecting unit 33, contacts each of the patterns 313, 315, and 317, a corresponding signal having a low level is output, and the respective patterns 313, 315, and 317 are output. If it does not touch), the corresponding signal of high level is output.

The control unit 40 controls the zoom operation from wide to tele and tele to wide according to the zoom pattern 311 of the barrel position detector 30 when the tele switch SW31 or the wide switch SW32, which is a zoom switch, is operated. When the zooming control unit 41 and the release switch SW2 are operated to control the zoom operation of the camera, it is determined whether the object distance measured by the distance measuring unit 10 is far or near, and the far distance according to the AF pattern 317. Alternatively, the AF control unit 43 controls the focusing operation at close range, and the exposure control unit 45 controls the exposure amount according to the object distance and brightness.

The zooming control unit 41 outputs a tele signal or a wide signal for controlling the zooming operation, and the barrel moving unit 50 rotates the motor M forward according to the tele signal and reverses the motor M according to the wide signal. Rotate The AF controller 43 outputs a focus adjustment signal for controlling the AF operation, and the barrel movement unit 50 rotates the motor M forward according to the focus adjustment signal.

Under the control of the exposure controller 45, the shutter unit 70 captures the light corresponding to the subject to be incident on the film through the photographing lens.

The main switch SW1 is a switch for supplying power to each device of the camera to set the camera to a shooting standby state. The release switch SW2 is a switch for initiating a photographing operation. When the user presses a shutter button (not shown) to start photographing, the release switch SW2 is sequentially operated to release first stage and release second stage in association with the shutter button. The zoom switch is composed of a tele switch SW31 for moving the barrel in the tele direction and a wide switch SW32 for moving the barrel in the wide direction.

The operation of the barrel control device of the zoom camera according to the embodiment of the present invention having such a structure will be described.

3 is a flowchart of a barrel control during zoom operation of the zoom camera according to an embodiment of the present invention, and FIG. 4 is a flowchart of a barrel control during focus adjustment operation of a zoom camera according to an embodiment of the present invention. . FIG. 5 shows a flow chart control flow chart during the closing process, an operation flow chart of the motor stop process is shown in FIG. 6A, an operation flow chart of the first AF stop process is shown in FIG. 6B, and a second flow chart is shown in FIG. The operation flowchart of the AF stop processing is shown.

As shown in FIG. 3, when the user operates the main switch SW1 of the camera to take a picture, power from a battery (not shown) is applied to each device (photometer, ranger, etc.), and the zooming control unit ( 41 drives the barrel moving part 50 to move the barrel from the closed position to the open position.

When the main switch SW1 is not operated in the automatic zoom camera, the barrel is positioned at a closed position accommodated inside the camera, and when the main switch SW1 is operated, the barrel is moved to an open position that can be photographed. In general, since the lens cover is closed in the closed position, photographing is not performed. As the lens cover is opened as the lens cover is moved to the open position, the photographing is possible.

As the barrel moving unit 50 rotates the motor M forward, the barrel starts to move out of the camera at a close position stored in the camera, and at this time, a pattern is attached to one surface of the encoder gear 52. As shown in FIG. 2, the unit 33 senses the close pattern 315 and outputs a low level close signal A and outputs a high level close signal A when the barrel is not moved. do.

When the high level close signal A is output from the barrel position detector 30, the zooming controller 41 determines that the barrel is being moved to the open position, and continues to the barrel mover 50 until the open position is detected. ) Is driven (S11 to S12).

When the barrel continues to move toward the open position and the pattern detector 33 detects the open position of the zoom pattern 313, the pattern detector 33 outputs a low level zoom signal B. The zoom controller 41 determines that the barrel has been moved to the open position when the low level zoom signal B is output from the barrel position detector 30, and branches to the motor stop routine shown in FIG. 6A to stop the motor. (S13 to S14).

When the motor stop routine shown in FIG. 6A starts, the zooming control unit 41 continuously drives the barrel moving unit 50 for the first set time so that the motor M rotates forward (S610). When the set time has elapsed, driving of the barrel moving unit 50 is stopped to stop the motor M (S620 to S630). When the motor M is stopped, the zooming control unit 41 returns to the routine shown in FIG. 3 (S640).

After stopping the barrel movement in the open position as described above, the zooming control portion 41 sets the zoom counter C to 1 to determine the zoom position (S15). In the present invention, since the zoom pattern 311 is formed to output a low level signal at a corresponding zoom position (for example, a zoom position corresponding to a focal length f = 38mm, f = 45mm, f = 50mm, etc.) according to the zoom operation. The zooming control unit 41 counts the low level zoom signal B to determine which zoom position the barrel is moved.

On the other hand, if the zoom signal B according to the open position detection is not outputted from the barrel position detector 30 so that the open overload time elapses while the barrel is moved from the closed position to the open position, When it is determined that an error has occurred, driving of the barrel moving unit 50 is stopped and the display unit 60 is driven to indicate that an error has occurred in the barrel opening moving operation (S16 to S18).

In the state where the barrel is in the open position, the zooming control portion 41 determines whether the release switch SW2 for starting photographing is operated, and if the release switch SW2 is not operated again, the main switch SW1 The operation is judged (S19 to S20).

When the main switch SW1 is operated, the zooming control section 41 branches to the close processing routine shown in FIG. 5 to move the barrel back to the closed position.

As shown in FIG. 5, when the closing processing routine is started, the zooming control unit 41 controls the barrel moving unit 50 to start the reverse rotation of the motor M (S510), and closes from the barrel position detecting unit 30. When the low level close signal A according to the detection of the pattern 315 is output, the barrel moving unit 50 is further driven for the first set time so that the motor M rotates in reverse (S520 to S530). When the first set time elapses, the driving of the barrel moving unit 50 is stopped to stop the motor M (S540 to S550). If the close signal is not output so that the set close overload time elapses even during the close stop processing, the motor M is stopped and the display unit 60 indicates that a close error has occurred and returns to the routine shown in FIG. 3. (S560 to S570).

In contrast, when the main switch SW1 is not operated, the zooming control unit 41 determines whether to select a zoom operation (S21). When the tele switch SW31 for moving the barrel in the tele direction is operated, the control unit 4 outputs a tele signal, and the barrel moving unit 50 rotates the motor M forward according to the tele signal to telescopic the barrel. The movement starts in the direction (S22 to S23).

As the barrel moves in the tele direction, the pattern detecting unit 33 of the barrel position detecting unit 30 also starts to move in the tele direction. Accordingly, the pattern detecting unit 33 moves at a low level in the open position. While outputting the output signal, the high-level zoom signal B is started to be output as the barrel moves. The controller 4 starts moving in the tele direction, and then increases the zoom counter C by +1 when the zoom signal B output from the barrel position detector 30 is converted from the high level to the low level according to the zoom position detection. (S25).

When the tele switch SW31 is not turned off while the barrel is moved in the tele direction as described above, the barrel moving unit 50 continuously rotates the motor M to move the barrel in the tele direction, and the zooming controller 41 ) Increases the zoom counter C by +1 every time the low level zoom signal B is output from the barrel movement detector 30 to determine the zoom position.

When the tele switch SW31 is turned off while the zoom operation in the tele direction is being performed, the zooming control unit 41 causes the zoom signal B output from the barrel movement detection unit 30 to go to a high level in accordance with the undetected zoom position. At the time of outputting, it branches to the motor stop routine shown in FIG. 6A attached, and stops the operation | movement of the barrel moving part 50 (S26-S28). Therefore, the barrel is located at the zoom position detected at the time when the tele switch SW31 is turned off.

On the other hand, when the barrel starts to move in the tele direction and then the barrel does not move to the tele position for the set zoom overload time, the zooming control unit 41 determines that an error has occurred and stops the driving of the barrel moving unit 50. The display unit 60 is driven to indicate that a zoom operation error has occurred (S29 to S31).

In contrast, when the wide switch SW32 is operated, the zooming control unit 41 outputs a wide signal, and the barrel moving unit 50 reversely rotates the motor M to move the barrel in the wide direction according to the wide signal. (S32-S33).

Also in this case, when the zoom signal B output from the barrel position detector 30 changes from the high level to the low level in accordance with the barrel movement, the zoom counter C is changed in the same manner as the zooming operation in the tele direction. Unlike the zooming operation, the zoom counter C is decreased by -1 (S34 to S35). In addition, when the wide switch SW32 is turned off while the zoom operation in the wide direction is being performed, the zooming controller 41 branches to the motor stop routine at the time when the zoom signal is output at a high level from the barrel movement detector 30. The operation of the barrel moving unit 50 is stopped (S36 to S38). Therefore, the barrel stops at the zoom position detected when the wide switch SW32 is turned off.

In addition, when the barrel starts to move in the wide direction and then the barrel does not move to the wide position for the set zoom overload time, it is determined that an error has occurred in the same manner as the tele operation, so that the driving of the barrel moving unit 50 is stopped and the display unit (60) is driven to indicate that a zoom operation error has occurred (S39 to S41).

As described above, in the embodiment of the present invention, when the tele switch SW31 is turned off while performing the zoom operation in the wide direction or the tele direction, the zoom operation is stopped at the zoom position which is detected immediately without any further processing. Therefore, the zoom operation control is simplified.

On the other hand, when the user operates the release switch SW2 to start shooting in the state where the barrel is in the open position, the AF control unit 43 performs the release process according to the routine shown in FIG. 4 (S42). .

As shown in FIG. 5, when the first release stage of the release switch SW2 is operated, the AF controller 43 operates the ranger 10 and the photometer 20, respectively, to measure the subject distance and the brightness of the subject. do.

The AF control unit 43 compares the measured subject distance with a set reference distance (for example, 38 mm), determines that the measured subject distance is shorter than the reference distance, and determines that the measured subject distance is short distance if the subject distance is larger than the reference distance. To judge. In addition, the exposure amount and the exposure time are calculated according to the measured subject distance and the subject brightness (S100 to S120).

Next, when the release switch SW2 is operated in the second release stage, the AF controller 43 performs AF adjustment according to the measured subject distance. More specifically, when the subject distance is close, the AF control unit 4 outputs a focus adjustment signal to the barrel moving unit 50, and the barrel moving unit 50 sets the motor M according to the focus adjustment signal. By rotating, the barrel is moved at the zoom position (S130 to S150). As the barrel moves, the pattern detector 33 detects an AF pattern 317 close to the zoom pattern 313 and outputs a corresponding pulse signal, and the AF controller 43 receives the AF pattern from the barrel movement detector 30. When the signal according to the detection is output and the signal according to the non-detection of the AF pattern 317 is output, the AF operation is stopped (S160 to S170).

For example, as shown in FIG. 2, when the subject distance is determined to be close by the barrel is located at the second zoom position according to the zooming operation, the AF controller 43 rotates the motor M forward. Accordingly, when the barrel moves in the tele direction and the third AF stage for focus adjustment at the second zoom position is detected, the barrel position detector 30 outputs a low level AF signal C, and the barrel continues. When moving to pass through the third AF stage, the barrel position detector 30 outputs a high level AF signal C. FIG. Therefore, the AF control section 43 branches to the first AF stop processing routine shown in FIG. 6B attached at the time when the AF signal C is changed from the low level to the high level.

When the first AF stop routine shown in FIG. 6B is started, the AF control unit 43 continuously drives the barrel moving unit 50 for the second set time to allow the motor M to rotate forward (S810). When the second set time elapses, driving of the barrel moving unit 50 is stopped to stop the motor M (S820 to S830). When the motor M is stopped, the AF control unit 43 returns to the routine shown in FIG. 4 (S840).

When the AF signal C output from the barrel position detecting unit 30 does not change from the high level to the low level so that the set AF overload time elapses even in the AF operation at close range, it is determined that the AF error has occurred. The driving of the moving unit 50 is stopped and the display unit 60 is driven to display the occurrence of the AF error (S180 to S200).

On the contrary, when the subject distance is far, the AF controller 43 causes the motor M to rotate forward in the same manner as in the near distance (S210), and then outputs a signal according to the AF pattern detection from the barrel position detector 30. The AF operation stop processing is performed at this point in time (S220).

For example, when it is determined that the subject distance is long while the barrel is located at the second zoom position according to the zooming operation, the AF control unit 43 rotates the motor M forward to make the barrel barrel in the same manner as the near AF described above. Is moved in the tele direction, and accordingly, the third AF stage is detected, and the barrel position detecting unit 30 outputs the low level AF signal C. FIG. Therefore, the AF control unit 41 branches to the first AF stop processing routine shown in FIG. 6B at the time when the AF signal C is converted to the low level to stop the motor M. FIG.

Also in this case, when the AF signal C output from the barrel position detecting unit 30 does not change from the high level to the low level so that the set AF overload time elapses, it is determined that the AF error has occurred and the barrel moving unit 50 ) Is stopped and the display unit 60 is driven to display the occurrence of the AF error (S230 to S250).

According to this operation, for example, when performing the AF adjustment at the second zoom position, when the subject is far, the barrel is stopped at the position where the third AF stage for focus adjustment at the second zoom position starts to be detected, and the subject If is near, the barrel is positioned at the position where the third AF stage is detected and then the third AF stage is terminated.

As described above, in the embodiment of the present invention, when the zoom position is detected, when the zoom position is detected, the motor M is immediately stopped without any further processing to stop the barrel at the zoom position, and then the release switch SW2 is operated. AF adjustment is performed according to the subject distance, and the AF adjustment at this time is made to compensate for the focus error caused by the backlash during the zoom operation.

When the above-described AF operation is completed, the exposure controller 45 drives the shutter unit 70 so that a shutter (not shown) is opened by the exposure amount for the calculated exposure time (S260). When the shutter operation is completed, that is, when the photographing is finished, the AF control unit 43 returns the barrel to the zoom position set in accordance with the zooming operation from the AF position. The AF control unit 43 outputs a return signal, and for example, the barrel moving unit 50 reversely rotates the motor M in response to the return signal, and the barrel is moved from the third AF stage positioned in accordance with the AF operation. Move to the zoom position (S270 to S280).

In the return operation, the AF control unit 43 shows the zoom signal B output from the barrel position detecting unit 30 at the time when the zoom signal B changes from the high level to the low level in response to the detection of the zoom pattern 311. The motor M is stopped by branching to the second AF stop processing routine (S290 to S300).

In the second AF stop processing routine shown in FIG. 6B, the AF control unit 43 continues to drive the barrel moving unit 50 for the third set time to allow the motor M to rotate forward (S910). When the time elapses, the driving of the barrel moving unit 50 is stopped to stop the motor M (S920 to S930).

Even in this case, when the zoom signal B output from the barrel position detection unit 30 does not change from the high level to the low level during the set AF overload time, it is determined that an error has occurred and the AF error is displayed through the display unit 60. It is displayed that it has occurred (S310 to S330).

In the exemplary embodiment of the present invention, the functions of the control unit 40 are divided into the zooming control unit 41, the AF control unit 43, and the exposure control unit 45 for convenience, but the present invention is not limited thereto. And control the shooting operation.

As described above, when the zoom operation of the wide or the tele is performed according to the embodiment of the present invention, when the zoom position is detected, the motor is stopped without any further processing to position the barrel at the zoom position, and the release switch is operated. The zoom operation can be simplified by compensating for a zoom error due to a backlash or the like during the AF operation according to the present invention.

In addition, even when zooming, the motor stops immediately at the zoom position, thereby improving the user's zooming feeling.

This invention is capable of various modifications and implementations without departing from the scope of the following claims.

Claims (8)

(Correction) a zoom switch for selecting a zooming operation for moving the barrel from the wide direction to the tele direction or for moving the barrel from the tele direction to the wide direction; A release switch which is sequentially operated in the first and second release stages when the photographing operation is selected; Ranging means for measuring a subject distance; Barrel moving means for moving the barrel; A zoom pattern indicating each zoom position according to a zoom operation, an AF pattern indicating a focus position set for each zoom position to compensate for a focus error, and detecting a zoom position according to the zoom pattern in association with the barrel movement Barrel position detection means for outputting a corresponding zoom signal, detecting a focus position according to the AF pattern, and outputting a corresponding AF signal; And Means for driving the barrel moving means in a tele or wide direction when the zoom switch is operated to perform a zoom operation, and stopping the driving of the barrel moving means when the zoom switch is not operated during the zoom operation, the release switch Means for driving the barrel moving means according to the measured subject distance so that the barrel is moved to a focus position according to the current zoom position to compensate for a focus error. The barrel control device of the zoom camera comprising a. (delete) (Correction) The method according to claim 1, The control means is a means for determining whether the object distance measured by the measuring means is remote or based when the release switch is operated in the first stage of release, and when the release switch is operated in the second stage of release. Means for outputting a focus adjustment signal for performing the AF operation according to the above, and compensating for a focus error generated during the zoom operation, And the barrel moving means moves the barrel to the focus position according to the current zoom position in accordance with the focus adjustment signal to perform the AF operation. The method of claim 3, The barrel position detecting means detects a focus position according to the movement of the barrel and outputs a corresponding AF signal, The control means is configured to shift the AF signal output from the barrel movement detecting means from a first level indicating focus position detection to a second level indicating no focus position when the object distance is shorter than the reference distance during the AF operation. Means for stopping the barrel movement means at the point of change, and when the subject distance is a far distance greater than a reference distance in the AF operation, an AF signal output from the barrel movement detection means is output at a first level indicating focus position detection; And a means for stopping the barrel movement means at the point of time. The method according to claim 1 or 4, If it is determined that the barrel reaches the zoom position or the focus position according to the zoom signal or the AF signal output from the barrel position detecting means during the zoom operation or the AF operation, the control means controls the barrel moving means to set the time. The barrel control device of the zoom camera that causes the barrel to move further in that direction and then stops. (Correction) determining whether to select a zooming operation for moving the barrel from the wide direction to the tele direction or moving the barrel from the tele direction to the wide direction; Moving the barrel in the tele direction or the wide direction when the zoom operation is selected according to the zoom switch operation; Determining whether the zoom switch is terminated; Terminating the barrel movement when the operation of the zoom switch is terminated; Determining whether the release switch for starting photographing when the zooming operation is completed; Measuring a subject distance when the release switch is operated in a first release stage; And Compensating the focus error generated during the zoom operation by moving the barrel to the corresponding focus position according to the measured subject distance when the release switch is operated in the second release stage. The barrel control method of the zoom camera comprising a. (delete) The method of claim 7, wherein Compensating the focus error, Determining whether the measured object distance is far or ground; Terminating the barrel movement at a time point when the AF signal indicating the focus position detection is changed from the first level to the second level indicating the non-focus position detection when the object distance is close; And And terminating the barrel movement at the time when the AF signal indicating the focus position detection is output at the first level indicating the focus position detection when the subject distance is far.