JP2001033869A - Lens driver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens driver which displays whether an abnormal drive of the lens is caused by battery consumption or other causes when the lens is not normally driven. SOLUTION: This lens driver is provided with a battery 13 and a CPU 11 for drive control of a lens 21 and display control of a display unit 25. The CPU 11 detects a voltage of the battery 13 when the lens 21 is not moved to a prescribed position or a prescribed amount in a prescribed time, and when this detected voltage is lower than a prescribed voltage, it makes the display unit 25 display that the battery has a low residual quantity, and when this detected voltage is the prescribed voltage or higher, it makes the display unit 25 display that the lens drive has not normally been performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a lens driving device provided with a battery check means.

[0002]

2. Description of the Related Art In conventional power zoom lens cameras, autofocus cameras, and the like, whether a lens has moved to a predetermined position within a predetermined time, or whether a lens motor for moving the lens has rotated a predetermined number of times within a predetermined time. The lens is driven while checking whether or not it has been performed. However, for some reason, the lens suddenly stops moving, or the lens driving operation is delayed, so that a predetermined time elapses before the lens moves to a predetermined position or the lens motor rotates a predetermined number of times. is there. In this case, the camera determines that some abnormality has occurred, and forcibly shuts off the power supply to the lens motor to prevent excessive current from flowing to the lens motor, and normally displays a predetermined error display. The camera informs the user that an abnormality has occurred in the camera, but the conventional error display does not reveal the cause of the abnormality.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lens driving device for displaying whether the cause is battery exhaustion or another cause when lens driving is not performed normally.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a driving means for moving a movable lens group of a photographing optical system, and a method for moving the movable lens group by the driving means within a predetermined time. When the movable lens group does not move to a predetermined position or does not move by a predetermined amount, a battery check means for detecting a voltage of the battery to determine whether or not the voltage is equal to or higher than a predetermined voltage; If it is determined that the voltage is not higher than the above, a message that the remaining battery level is low is displayed on the display unit, and if it is determined that the voltage of the battery is equal to or higher than the predetermined voltage, the display unit indicates that the lens drive is abnormal. This is characterized in that a display means for displaying is provided. According to the above configuration,
When the movable lens group is not normally moved by the driving means, the user can know whether the cause is due to battery exhaustion or another cause.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a main configuration of a control system of a zoom lens camera to which the present invention is applied.
The CPU 11 is a microcomputer that comprehensively controls the control system, and has an R that stores a control program and the like.
It incorporates an OM, a RAM for temporarily storing predetermined data for calculation or control, and an A / D converter for converting an input analog signal into a digital signal.

The battery 13 functions as a power supply for supplying power to the control system. Battery check control circuit 1
Reference numeral 5 denotes a circuit which is connected to the battery check load 17 and the CPU 11 and controls a battery check process for detecting a charge voltage of the battery 13 in response to a battery check start / end command from the CPU 11. That is, when a battery check start command is issued from the CPU 11, the battery check control circuit 15 connects the battery 13 and the battery check load 17, causes a current to flow through the battery check load 17, and generates a voltage generated at both ends of the battery check load 17. (Battery voltage V) is detected and output to the CPU 11. When a battery check end command is issued from the CPU 11, the connection between the battery 13 and the battery check load 17 is cut off, and the power supply to the battery check load 17 is stopped.

The CPU 11 inputs the battery voltage V detected by the battery check control circuit 15 and performs A / D conversion, and compares the A / D converted battery voltage V with a preset battery check voltage. And CPU1
1 indicates that the battery check result is OK when the battery voltage V is higher than the battery check voltage, and that the battery check result is NG when the battery voltage V is lower than the battery check voltage. The CPU 11, the battery check control circuit 15, and the battery check load 17 constitute a battery check unit.

The lens drive circuit 19 is a circuit connected to the CPU 11, which drives the lens motor 20 and moves the lens 21 in response to a drive command from the CPU 11.
The lens 21 is a zoom lens that is zoomed by the lens motor 20 in the present embodiment, and has a code portion for detecting a zoom code corresponding to a movable lens position and a brush. The decoder 23 detects the zoom code detected by the lens 21 as a voltage,
It has the function of outputting to The CPU 11, the lens driving circuit 19, and the lens motor 20 constitute a lens driving unit, and the CPU 11, the lens 21, and the decoder 23 constitute a lens position detecting unit.

The display 25 has a battery N on its display.
It has a function of displaying various information output from the CPU 11, such as a G mark and an error display. In a normal shooting state, as shown in FIG.
1 displays various shooting information in addition to the number of shots, a zoom lever state is displayed on the second display unit 253, and nothing is displayed on the third display unit. When the battery check means determines that the battery check result is NG, as shown in FIG. 9B, the first and second display units 251 and 253 are not changed from the normal state, but the third display unit 255 displays the battery NG.
Since the mark is displayed, the user can know that the remaining battery power is low. When the CPU 11 determines that some abnormality has occurred, an error is displayed on the first display unit 251 instead of the number of shots, and nothing is displayed on the third display unit 255, as shown in FIG. 9C. . This allows the user to know that some abnormality has occurred in the camera. Display means is constituted by the CPU 11 and the display 25.

The CPU 11 includes, as switches, a main switch SWM for activating the CPU 11, a tele-zoom switch SWT for zooming up the lens 21 toward the tele end, and a wide zoom switch SWW for zooming back the lens 21 toward the wide end. Is connected.

Next, referring to FIG. 2, FIG. 3 and Table 1,
The outline of the lens position detecting operation by the lens position detecting means will be described. FIG. 2 shows an embodiment of a load provided in the decoder 23. The loads are four loads R1, R2, R3, R4 having different resistance values connected in series.
, And terminals ZC1, ZC2,
ZC3 is connected, terminal ZC0 is connected between R1 and the ground, and terminal ZC4 is connected between R4 and the positive voltage terminal _Vcc . The terminal P is connected between the terminal ZC3 and the load R4.

FIG. 3A shows a zoom code pattern formed by zoom codes 0 to 4 corresponding to the lens position of the lens 21 in a code portion (not shown) of the lens 21. ) Indicates a combination of terminals ZC0 to ZC4 that are short-circuited corresponding to the zoom code that has slidably contacted the brush 30. FIG. 3C is a diagram showing the voltage ratio (resistance division ratio) input from the decoder 23 by the CPU 11 after A / D conversion. FIG. 3D shows the lens code numbers 0 to 6 and the lens codes. It is a figure which shows the relationship between the lens position corresponding to number 0-6, and the lens position number of 0-13.

Terminals ZC0 to ZC4 to be short-circuited, resistance division ratio,
Table 1 shows the relationship between lens code numbers and lens codes.

[Table 1]

In Table 1 and FIG. 3D, the storage code 1 detects the state where the lens 21 is stored (lens position number 0), and the wide code 2 indicates the state where the current position of the lens 21 is at the wide end. (Lens position number 2) is detected, and the telerecord 6 is a lens code for detecting a state where the current position of the lens 21 is at the telephoto end (lens position number 13). While the lens 21 is moving from the current position to the next position, none of the terminals is short-circuited.
Becomes

As the lens 21 moves, first,
The brush 30 moves on a zoom code pattern formed on a code portion (not shown) of the lens 21 (see FIG. 3A), and the terminals ZC0 to ZC0 of the decoder 23 correspond to the zoom codes 0 to 4 that are in sliding contact with the brush 30. ZC4 is short-circuited (see FIG. 3B). At this time, the decoder 23 detects the voltage generated at the terminal P according to the short-circuited terminals ZC0 to ZC4, and sets the voltage generated at the terminal P when the terminals ZC4 and ZC3 are short-circuited to 100%. The ratio is converted to a ratio (resistance division ratio) and output to the CPU 11. CP
U11 performs A / D conversion on the input voltage ratio (FIG. 3C).
(See FIG. 3D) based on the A / D conversion value. The CPU 11
The lens position and the lens position number of the lens 21 are detected based on the converted lens code number.

Next, the outline of the lens driving operation by the lens driving means will be described. The CPU 11 drives the lens motor 20 via the lens drive circuit 19 while checking the current position of the lens 21 with the lens code,
The lens 21 is moved. Although details will be described later, for example, when the lens 21 is moved from the wide end to the telephoto end, as shown in FIG.
Code), the lens motor 20 is driven so as to input the lens code number 4 (B code).
When the lens code number 4 is input, the lens motor 20 is driven so that the lens code number 5 (C code) is input, and when the lens code number 5 is input, the lens motor 20 is input so that the lens code number 3 is input next. Drive. In other words, the CPU 11 moves the lens 21 while repeatedly inputting and checking the code numbers in the order of the lens code numbers 3 → 4 → 5 → 3.
When (telerecord) is input, the lens motor 20 is stopped via the lens drive circuit 19.

When it takes more than a predetermined time from the input of the current lens code during driving of the lens to the input of the next lens code (excluding the OFF code), that is, the lens 21 moves to the predetermined position within the predetermined time. If not, the CPU 11 suspends the lens driving and executes a battery check process. CPU1 in battery check process
When it is determined that the battery check result is NG, the battery NG mark is displayed on the display 25 (FIG. 9).
(B)). When the battery check result is determined to be OK, an error display is displayed on the display 25 (FIG. 9).
(C)).

Next, the main operation of the zoom lens camera to which the present invention is applied will be described in more detail with reference to FIGS. FIG. 4 is a flowchart relating to the main processing of the zoom lens camera, which is processing when a battery is loaded. When the battery 13 is loaded,
In this main process, the CPU 11 initializes the built-in RAM, each input / output port, and peripheral circuits connected to each input / output port, and returns the lens 21 to the storage position when the lens 21 is not at the storage position when the lens 21 is not at the storage position. Turn off (S11,
S13). Thereafter, the standby operation mode is set to cut off the power supply to each peripheral circuit, and wait until a switch operation is performed (S15, S17; N). If any switch operation is performed, the normal operation mode is set, power supply to each peripheral circuit is started, and it is checked whether the power is on (S17; Y, S19, S21).

If the power is not on, it is checked whether the main switch SWM is on (S2).
1; N, S23). If the main switch SWM is on, a lens extension process is executed (S23; Y, S
25). In the lens extension process, details will be described later,
The lens 21 returned to the storage position in the initialization processing of S11 is extended to the wide end. Then, a power-on setting process is executed, and the power is turned on (S27, S29). If the main switch SWM has not been turned on, the process returns to S15 (S23; N, S15). Therefore, when the power is off, even if a switch operation other than the main switch SWM is performed, the operation becomes invalid.

If the power is on, the main switch S
It is checked whether the WM is off (S21;
Y, S31). When the main switch SWM is off, the lens storage process is executed to return the lens 21 to the storage position, the power-off setting process is executed, and the power is turned off.
Return to S15 (S31; Y, S33, S35, S3
7).

If the main switch SWM is not turned off, it is checked whether the telezoom switch SWT is turned on (S31; N, S39). If the tele-zoom switch SWT is on, the tele-zoom process is executed, and the process returns to S15 (S39; Y, S41). The tele-zoom process, which will be described in detail later, is a process of moving the lens 21 from the wide end to the tele-end direction.

If the telezoom switch SWT is not on, it is checked whether the wide zoom switch SWW is on (S39; N, S43). When the wide zoom switch SWW is on, the lens 2
Wide zoom processing for moving 1 from the telephoto end to the wide end is performed, and the process returns to S15 (S43; Y, S45).
When the wide zoom switch SWW is not turned on,
A process corresponding to another switch operation is executed, and S15
Return to (S43; N, S47). The processes corresponding to other switch operations include, for example, an exposure calculation process and an AF process executed by turning on a photometry switch, a release process and a film winding process executed by turning on a release switch.

The lens extension process executed in S25 will be described in more detail with reference to the flowchart shown in FIG. This process is a process of moving the lens 21 from the storage position to the wide end, and the main switch SW
It is executed when M is turned on. In this process, first, a battery check A process for checking the battery voltage V of the battery 13 is performed (S101).

When it is determined that the battery check result is NG, the process returns (S103; N). Since the remaining amount of the battery 13 is small, the lens cannot be driven or the lens driving operation is delayed, and it is highly likely that a predetermined time has elapsed before the lens 21 is moved to a predetermined position. It is not allowed.

When it is determined that the battery check result is OK, a 3-second timer is set, and the lens motor 20 is rotated forward through the lens drive circuit 19 (S103; Y, S1).
05, S107). The three-second timer is a timer for checking whether or not the lens driving is normally performed. In the description of the present embodiment, the rotation direction of the lens motor 20 that moves the lens 21 from the storage position toward the wide end and the tele end is defined as the normal rotation direction.

Next, a lens position determination process is executed (S
109). This process is a process for detecting and storing the current position of the lens 21 based on the input lens code, which will be described later in detail. If the lens 21 has not moved to the wide-angle end, S109 to S109 are performed until the 3-second timer expires.
115 is repeated (S111; N, S115;
N, S109).

When the lens 21 has moved to the wide end, the lens motor 20 is stopped via the lens drive circuit 19 (S111; Y, S113). When the three-second timer times out before the lens 21 moves to the wide end, the lens motor 20
Is stopped, and the battery check B process is executed (S1).
15; Y, S117, S119). Note that the lens position stored in the lens position determination process executed immediately before stopping the lens motor 20 is the current position of the lens 21 when the lens motor 20 is stopped.

The battery check B process is executed, and when it is determined that the battery check result is NG, the process returns (S121; Y). This is because it is considered that three seconds have elapsed before the CPU 11 inputs the wide code because the remaining amount of the battery 13 is small. At this time, since the battery NG mark is lit and displayed on the display 25 instead of the error display (see FIG. 9B), the user knows that the lens drive was not performed normally due to battery exhaustion. be able to.

When the battery check B processing is executed and the battery check result is determined to be OK, an error display is output to the display 25 (S121; N, S123). This is because it is considered that the lens driving was not performed normally due to an external force applied to the lens barrel of the lens 21 or the like.
By this processing, an error is displayed on the display 25 (see FIG. 9C), so that the user can know that the lens drive was not performed normally due to a cause other than the battery exhaustion.

Next, the telezoom processing for moving the lens 21 from the wide end to the tele end will be described in more detail with reference to the flowchart shown in FIG. This processing is executed when the tele-zoom switch SWT is turned on.

In this process, first, a battery check A process for checking the battery voltage V of the battery 13 is performed (S201). When the battery check A process is executed and the battery check result is determined to be NG, the process returns as it is (S203; N). Since the remaining amount of the battery 13 is small, the lens cannot be driven or the lens driving operation is delayed, and it is highly possible that a predetermined time elapses before the lens 21 is moved to a predetermined position. There is no. Battery check result OK
If it is determined that the timer is 3 seconds, the timer is set, and the lens motor 20 is rotated forward through the lens driving circuit 19 (S2).
03; Y, S205, S207).

Next, a lens position determination process is executed (S
209). This process is a process for detecting and storing the current position of the lens 21 based on the input lens code, which will be described later in detail. When the lens 21 has not moved to the telephoto end, that is, when the CPU 11 has not input the telerecord 6, the state of the telezoom switch SWT is checked (S211; N, S213). When the tele-zoom switch SWT is on, it is checked whether the 3-second timer has elapsed (S213; Y, S21).
5). If the three-second timer has not elapsed, the process returns to S209 and repeats the processing of S209 to S215 until the timer elapses (S215; N, S209).

When the lens 21 has moved to the telephoto end or when the telezoom switch SWT is turned off, the lens motor 20 is stopped via the lens drive circuit 19 (S211; Y or S213; N, S217). Before entering the next lens code (excluding OFF code)
When the second timer times out, the lens driving circuit 1
9, the lens motor 20 is stopped, and the battery check B process is executed (S215; Y, S219, S2).
21). Note that the lens position stored in the lens position determination process executed immediately before stopping the lens motor 20 is the current position of the lens 21 when the lens motor 20 is stopped.

The battery check B process is executed, and if it is determined that the battery check result is NG, the process returns (S223; Y). At this time, a battery NG mark is lit on the display 25 instead of an error display (see FIG. 9B), so that the user knows that the lens drive was not performed normally due to battery exhaustion. Can be. If it is determined that the battery check result is OK, an error display is output to the display 25 (S223; N, S22).
5). By this processing, an error is displayed on the display 25 (see FIG. 9C), so that the user can know that the lens drive was not performed normally due to a cause other than the battery exhaustion.

Next, the lens position determination processing executed in S109 and S209 will be described in more detail with reference to the flowchart shown in FIG. This process is performed in the battery check A process.
When it is determined that the lens motor 20 is driven, the processing is executed.

First, upon entering this processing, the CPU 11
The lens position number stored in the lens position address of AM is read out, and the lens position number is written in the memory position register, and a standby state for inputting the next lens code is entered (S301). However, when the lens 21 is in the lens storage position, the main switch S
When this processing is executed in the first step S109 after the WM is turned on, the lens position number 0 (storage position) is stored. Thereafter, the result of the previous lens position determination process is stored.

Then, the voltage ratio output from the decoder 23 is input and A / D converted, and the A / D converted value is converted into a lens code (S303, S305). If the input lens code is the OFF code, the process returns (S307; Y). If the input lens code is the storage code 1, the lens position number 0 (storage position) is written in the lens position register, and the process proceeds to S331 (S331).
307; N, S309; Y, S311). If the input lens code is the wide code 2, the lens position number 2 (wide end position) is written in the lens position register and the process proceeds to S331 (S309; N, S313; Y, S3).
15). If the input lens code is telerecord 6, the lens position number 13 (tele end position) is written into the lens position register, and the process proceeds to S331 (S313; N,
S317; Y, S319).

When the input lens code is other than the above code, that is, A code 3, B code 4, or C code
If it is any of the codes 5, the lens code to be inputted next is calculated from the lens position number stored in the memory position register and the rotation direction of the lens motor 20 in S301 (S317; N, S321). . And
It is checked whether the calculated next code matches the input lens code (S323). If the next code and the lens code do not match, it is considered that the lens 21 has not moved to the next lens position or the lens drive has not been performed normally, and the process returns as it is (S
323; N). When the next code and the lens code match, the rotation direction of the lens motor 20 is checked (S3).
25). If the lens motor 20 is rotating forward, 1 is added to the lens position number stored in the lens position register and stored (S325; Y, S327). If the lens motor 20 is not rotating forward, that is, rotating backward, 1 is subtracted from the lens position number stored in the lens position register and stored (S325; N, S32).
9).

S311, S315, S319, S32
7. It is checked whether the lens position number stored in the lens position register in one of S329 and the lens position number stored in the memory position register in S301 matches (S331). If the lens position number stored in the lens position register does not match the lens position number stored in the memory position register, the 3 second timer is restarted to continue driving the lens (S331; N, S
333). If the lens position number stored in the lens position register matches the lens position number stored in the memory position register, the lens 21 has moved from the storage position, wide end position, or tele end position to the next lens position. Since there is not, return is made and lens driving is continued.

Next, S101 and S1 of the lens extension process
Steps S19 and S2 of the tele-zoom processing
The battery check A process and the battery check B process executed in step 21 will be described with reference to the flowchart shown in FIG. Battery check A
The process is performed at the start of lens driving to avoid a situation in which the lens 13 cannot be normally driven due to a low remaining amount of the battery 13. In the battery check B process, even if it is determined that the battery check result is OK in the battery check A process, the battery voltage V may suddenly decrease during driving of the lens depending on the use condition of the battery 13 and use conditions such as temperature. This is a process executed when a three-second timer has elapsed.

In this process, first, a battery check voltage is set. The battery check voltage V1 is set in the battery check A process, and the battery check voltage V2 is set in the battery check B process (S401, S40).
3). Note that the battery voltage V may drop sharply after the lens driving is started depending on the usage conditions and temperature of the battery 13 and the like, so that the battery check voltage V2 is set lower than the battery check voltage V1.

Next, the battery check load 17 is energized via the battery check control circuit 15 (S40).
5). After a lapse of 10 ms (milliseconds), the battery voltage V generated at both ends of the battery check load 17 is input and A / A
D conversion, and the power supply to the battery check load 17 by the battery check control circuit 15 is stopped (S407, S407).
409, S411).

Then, the A / D converted battery voltage V is compared with the battery check voltage set in S401 and S403 (S413). When the battery voltage V is higher than the battery check voltage, it is determined that the battery check result is OK, and the battery NG mark is turned off on the display 25 (S413; N, S415, S417). When the battery voltage V is lower than the battery check voltage, it is determined that the battery check result is NG and the display 25
Display a battery NG mark (S413;
Y, S419, S421).

As is clear from the above description, in the present embodiment, a predetermined time (before the CPU 11 inputs the next lens code (excluding the OFF code 0), that is, before the lens 21 moves to the next lens position. (3 seconds) has elapsed, a battery check process is executed. If the battery check result is determined to be NG, the display 25
Since the battery NG mark is lit and displayed, the user can know that the lens driving was not performed normally because the remaining amount of the battery 13 is small. When it is determined that the battery check result is OK, an error message is displayed on the display unit 25, so that the user can know that the lens drive was not performed normally due to a cause other than battery exhaustion.

In this embodiment, the battery check process is executed before the lens drive is started, and the lens drive is started only when the battery check result is determined to be OK. It is possible to avoid a situation in which the lens drive cannot be performed normally due to the small number.

The present invention is not limited to the zoom lens described in the present embodiment, but can be applied to electrically driven lenses such as an autofocus lens.

[0047]

According to the present invention, when the movable lens group cannot be moved to a predetermined position or a predetermined amount within a predetermined time when the movable lens group is moved by the driving means, the battery check means is provided. Detects the battery voltage and determines whether or not the battery voltage is equal to or higher than a predetermined voltage, and when the battery check means determines that the battery voltage is not equal to or higher than the predetermined voltage, the display means displays on the display unit that the remaining battery power is low. When it is determined that the voltage of the battery is equal to or higher than a predetermined voltage, the display unit displays that the lens drive was not performed normally. Can be determined whether or not is due to battery exhaustion.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an embodiment of a main configuration of a control system of a zoom lens camera to which the present invention is applied.

FIG. 2 is a diagram showing an embodiment of a load provided in a lens barrel of the zoom lens camera.

FIG. 3 is a diagram showing a lens code and a lens position when the lens of the zoom lens camera has moved from a storage position to a telephoto end.

FIG. 4 is a view showing a flowchart relating to main processing of the zoom lens camera.

FIG. 5 is a view showing a flowchart relating to a lens extension process of the zoom lens camera.

FIG. 6 is a view showing a flowchart concerning tele-zoom processing of the zoom lens camera.

FIG. 7 is a view showing a flowchart relating to a lens position determination process of the zoom lens camera.

FIG. 8 is a flowchart showing a battery check A process and a battery check B process of the zoom lens camera.

FIG. 9 is a diagram showing an example of a display mode of a display panel of the zoom lens camera.

[Explanation of symbols]

 11 CPU 13 Battery 15 Battery check control circuit 17 Battery check load 19 Lens drive circuit 21 Lens 23 Decoder 25 Display SWM Main switch SWT Tele zoom switch SWW Wide zoom switch

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 26, 2000 (2007.2
6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

Next, referring to FIG. 2, FIG. 3 and Table 1,
Outline of lens position detection operation by lens position detection means
explain about. FIG.Of the decoder 23One embodiment
Is shown.The decoder 23 has four resistors having different resistance values.
Anti-R1, R2, R3 and R4 are connected in series.
Between the resistorsTerminals ZC1, ZC2, ZC3 are connected
AndResistance R1Terminal ZC0 is connected between the
Resistance R4And the positive voltage terminal V _ccTerminal ZC4 is connected between
ing. Also, the terminal ZC3Resistance R4The terminal P is between
It is connected.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

Table 1 shows the relationship among the terminals Z0 to Z4 to be short-circuited, the resistance division ratio, the lens code number, and the lens code.

[Table 1]

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction contents]

As the lens 21 moves, first,
The brush 30 moves on a zoom code pattern formed on a code portion (not shown) of the lens 21 (see FIG. 3A), and the terminals ZC0 to ZC0 of the decoder 23 correspond to the zoom codes 0 to 4 that are in sliding contact with the brush 30. ZC4 is short-circuited (see FIG. 3B). At this time, the decoder 23 is short-circuited.
Voltage ratio (resistance division) according to the set terminals ZC0 to ZC4.
Ratio) is output to a terminal P. This voltage ratio is equal to the positive voltage terminal V
cc is set to 100%, and the CPU 11
Is output to The CPU 11 sets the input voltage ratio to A / D
Conversion (see FIG. 3 (C)) and conversion into lens code numbers of 0 to 6 based on the A / D conversion value (see FIG. 3 (D)). The CPU 11 detects the lens position and the lens position number of the lens 21 based on the converted lens code number.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction contents]

If the main switch SWM is not turned off, it is checked whether the telezoom switch SWT is turned on (S31; N, S39). If the tele-zoom switch SWT is on, the tele-zoom process is executed, and the process returns to S15 (S39; Y, S41). Although the details will be described later, the tele- zoom process is a process of moving the lens 21 toward the tele-end .

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0022

[Correction method] Change

[Correction contents]

If the telezoom switch SWT is not on, it is checked whether the wide zoom switch SWW is on (S39; N, S43). When the wide zoom switch SWW is on, the lens 2
Wide zoom processing for moving 1 in the wide end direction is performed, and the process returns to S15 (S43; Y, S45). If the wide zoom switch SWW is not turned on, a process corresponding to another switch operation is executed, and the process returns to S15 (S15).
43; N, S47). The processes corresponding to other switch operations include, for example, an exposure calculation process and an AF process executed by turning on a photometry switch, a release process and a film winding process executed by turning on a release switch.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0024

[Correction method] Change

[Correction contents]

When it is determined that the battery check result is NG, the process returns (S103; Y ). Since the remaining amount of the battery 13 is small, the lens cannot be driven or the lens driving operation is delayed, and it is highly likely that a predetermined time has elapsed before the lens 21 is moved to a predetermined position. It is not allowed.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0025

[Correction method] Change

[Correction contents]

When it is determined that the battery check result is OK, a three-second timer is set, and the lens motor 20 is rotated forward through the lens drive circuit 19 (S103; N , S1).
05, S107). The three-second timer is a timer for checking whether or not the lens driving is normally performed. In the description of the present embodiment, the rotation direction of the lens motor 20 that moves the lens 21 from the storage position toward the wide end and the tele end is defined as the normal rotation direction.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0030

[Correction method] Change

[Correction contents]

Next, the telezoom process for moving the lens 21 toward the telephoto end will be described in more detail with reference to the flowchart shown in FIG. This processing is executed when the tele-zoom switch SWT is turned on.

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction contents]

In this process, first, a battery check A process for checking the battery voltage V of the battery 13 is performed (S201). The battery check A process is executed, and when it is determined that the battery check result is NG, the process returns (S203; Y ). Since the remaining amount of the battery 13 is small, the lens cannot be driven or the lens driving operation is delayed, and it is highly possible that a predetermined time elapses before the lens 21 is moved to a predetermined position. There is no. Battery check result OK
If it is determined that the timer is 3 seconds, the timer is set, and the lens motor 20 is rotated forward through the lens driving circuit 19 (S2).
03; N , S205, S207).

[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction contents]

When the input lens code is other than the above code, that is, A code 3, B code 4, or C code
If it is any of the codes 5, the lens code to be inputted next is calculated from the lens position number stored in the memory position register and the rotation direction of the lens motor 20 in S301 (S317; N, S321). . And
It is checked whether the calculated next code matches the input lens code (S323). If the next code and the lens code do not match, the lens 21 has not moved to the next lens position, and the process returns (S323; N). If the next code matches the lens code, the rotation direction of the lens motor 20 is checked (S325). When the lens motor 20 is rotating forward, 1 is added to the lens position number stored in the lens position register and stored (S325; Y, S32).
7). If the lens motor 20 is not rotating forward, that is, rotating backward, 1 is subtracted from the lens position number stored in the lens position register and stored (S325;
N, S329).

[Procedure amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0039

[Correction method] Change

[Correction contents]

S311, S315, S319, S32
7. It is checked whether the lens position number stored in the lens position register in one of S329 and the lens position number stored in the memory position register in S301 matches (S331). If the lens position number stored in the lens position register does not match the lens position number stored in the memory position register, the 3 second timer is restarted to continue driving the lens (S331; N, S
333). When the lens position memory and lens position numbers and memory lenses position number in the memory location register in the register are identical, the movable lens 21 is housed position, the wide-angle end position or the telephoto end position to the next lens position
Since it has not been performed, the routine returns to continue the lens drive.

[Procedure amendment 12]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an embodiment of a main configuration of a control system of a zoom lens camera to which the present invention is applied.

FIG. 2 is an embodiment of a decoder of the zoom lens camera.
FIG.

FIG. 3 is a diagram showing a lens code and a lens position when the lens of the zoom lens camera has moved from a storage position to a telephoto end.

FIG. 4 is a view showing a flowchart relating to main processing of the zoom lens camera.

FIG. 5 is a view showing a flowchart relating to a lens extension process of the zoom lens camera.

FIG. 6 is a view showing a flowchart concerning tele-zoom processing of the zoom lens camera.

FIG. 7 is a view showing a flowchart relating to a lens position determination process of the zoom lens camera.

FIG. 8 is a flowchart showing a battery check A process and a battery check B process of the zoom lens camera.

FIG. 9 is a diagram showing an example of a display mode of a display panel of the zoom lens camera.

[Description of Signs] 11 CPU 13 Battery 15 Battery check control circuit 17 Battery check load 19 Lens drive circuit 21 Lens 23 Decoder 25 Display SWM Main switch SWT Tele zoom switch SWW Wide zoom switch

[Procedure amendment 13]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2

Claims (3)

[Claims] 1. A driving means for moving a movable lens group of a photographing optical system, and the movable lens group moves to a predetermined position or a predetermined amount within a predetermined time when the driving lens group is moved by the driving means. If not, a battery check means for detecting the voltage of the battery to determine whether or not the voltage is equal to or higher than a predetermined voltage; and if the battery check means determines that the voltage of the battery is not equal to or higher than the predetermined voltage, the display unit displays the battery. Display means for displaying that the remaining amount is low, and displaying, when it is determined that the voltage of the battery is equal to or higher than a predetermined voltage, that the lens drive has not been normally performed on the display unit. A lens driving device characterized by the above-mentioned. 2. The lens drive device according to claim 1, wherein the battery check unit detects a voltage of the battery before the drive unit starts moving the movable lens group, and the battery check unit checks the voltage of the battery. The lens driving device, wherein when it is determined that the voltage is not higher than a predetermined voltage, the driving unit does not move the movable lens group. 3. The lens driving device according to claim 2, wherein the battery check unit is configured to detect the battery when the movable lens group does not move to a predetermined position or a predetermined amount by the driving unit within a predetermined time. A comparison voltage value to be compared with a voltage is set lower than a voltage value compared before the driving unit starts moving the movable lens group, and it is determined whether or not the voltage of the battery is equal to or higher than the comparison voltage. Lens driving device.