JP3521867B2 - Camera shake display - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera shake display device which is arranged in a camera and which displays information on the amount of camera shake.

[0002]

2. Description of the Related Art Conventionally, there is known a camera having an image pickup lens detachable and having an image stabilizing function, which detects a camera shake and shifts the image stabilizing lens based on the detected amount to suppress the camera shake.

[0003]

However, in conventional cameras, the amount of camera shake that can be tolerated differs depending on the type of lens to be mounted. Therefore, how much camera shake should be suppressed with that lens? ,
After shooting, there is a problem that the photographer cannot know whether or not the amount of camera shake at the time of shooting is within the allowable range of the amount of camera shake of the mounted lens.

The present invention has been made in order to solve the conventional problems, and an object of the present invention is to provide a camera shake display device capable of notifying a photographer of information regarding the amount of camera shake.

[0005]

According to another aspect of the present invention, there is provided a camera shake display device for determining whether or not a photographing lens detachably attached to a camera body has data indicating a camera shake amount allowable value suitable for this lens. Judgment means (for example, step S204 in FIG. 4) for making a judgment, and when the judgment means judges that an image pickup lens having no data indicating the allowable amount of camera shake is attached, a predetermined predetermined camera shake Allowance
Display contents value (e.g., step S205 in FIG. 4), whereas, when the imaging lens having the data indicating the camera-shake amount permissible value is discriminated as being correctly mounted, the hand shake amount allowed by this photographing lens has Display means for displaying the allowable amount of camera shake based on the data indicating the value (for example, step S2 in FIG. 4).
06) and.

According to a second aspect of the present invention, there is provided a camera shake display device according to the first aspect, which is a mounting discriminating means for discriminating whether or not a photographing lens detachable from the camera body is mounted on the camera body (for example, step of FIG. 4). S202), and an extinguishing means (for example, step S208 in FIG. 4) that extinguishes the display of the display means when the attachment determining means determines that the photographing lens is not attached to the camera body. Is.

A camera shake display device according to claim 3 is a camera body.
Or the amount of displacement of the shooting lens provided in the camera body
Shake amount display means for displaying the shake amount (for example, FIG.
Display part 26), the allowable amount of camera shake and the amount of camera shake
Shake amount permissible amount display means (for example,
For example, the display unit 23, 24, 25 in FIG.

[0008]

[0009]

[0010]

(Operation) In the camera-shake display device according to the first aspect, when the photographing lens having no data indicating the camera-shake amount allowable value is attached,
When a predetermined display is displayed and a photographic lens having data indicating the allowable amount of camera shake is attached, the allowable amount of camera shake is based on the data indicating the allowable amount of camera shake that the photographic lens has. Is displayed.

In the camera shake display device according to the second aspect, the display is turned off when the taking lens is not attached to the camera body. Hand shake display device according to claim 3, the hand of the taking lens
The allowable shake amount is displayed so that it can be compared with the shake amount.

[0013]

[0014]

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a circuit block diagram of a camera equipped with a camera shake display device of the present invention. The circuit of this camera is
It is roughly divided into a camera body portion A on the camera body side and a photographing lens portion B on the photographing lens side that is detachably attached to the camera body. First, in the camera body A, the CPU 1 has a main switch SW12 for starting the operation of the camera, a half-press switch SW13 that is turned on by half-pressing the release button, and a release switch SW14 that is turned on by fully-pressing the release button. The camera shake amount detection circuit 2 for detecting the camera shake amount and the LCD 3 including a liquid crystal display element are connected.

On the other hand, in the taking lens section B (hereinafter sometimes simply referred to as a lens) capable of communicating with the camera body section A, taking lenses 8, 9, 10, 11 including a camera shake correction lens 10 for correcting camera shake. And a memory circuit 4 that stores lens information and can transfer the information to the CPU 1 according to an instruction from the CPU 1, a camera shake correction motor 6 that drives the camera shake correction lens 10, and a camera shake correction motor 6 are controlled. The camera shake correction circuit 5 and the camera shake correction circuit 5 that detects the position of the camera shake correction lens 10 and outputs the position to the camera shake correction circuit 5 and the CPU 1 are arranged.

FIG. 1 is a circuit diagram when a lens having an anti-vibration mechanism is mounted. Depending on the type of lens, the camera shake correction lens 10, the camera shake correction motor 6, the camera shake correction circuit 5, and the lens position detection. There are some which do not have the circuit 7 and the memory circuit 4. Here, the CPU 1 is composed of a one-chip microcomputer, controls the sequence of the camera, and has a function of driving the LCD 3.

The camera shake amount detection circuit 2 of the camera body A is
Although the amount of camera shake of the camera is detected, the camera shake correction circuit 5 is configured to move the camera shake correction lens 10 based on the output of the camera shake amount detection circuit 2. Then, the lens position detection circuit 7 detects the position of the camera shake correction lens 10, returns its output to the camera shake correction circuit 5, and performs negative feedback control to perform accurate camera shake correction.

The outputs of the camera shake amount detection circuit 2 and the lens position detection circuit 7 are also output to the CPU 1 so that the camera shake amount of the camera can be confirmed by the CPU 1 and the output of the lens position detection circuit 7 can be used as a basis. , Image stabilization lens 10
Is calculated and the difference from the detected amount of camera shake is calculated, so that the amount of camera shake remaining after camera shake correction is calculated.

Next, the main switch SW12 is a state switch having an ON position and an OFF position. Once the user sets the ON position, the main switch SW12 holds the ON position until it is returned to the OFF position again. The LCD 3 externally displays necessary information such as a camera shake amount of the camera, a camera shake amount remaining after the camera shake correction, or an allowable value of the camera shake amount that varies depending on the attached photographing lens, in accordance with an instruction from the CPU 1.

FIG. 2 shows a display example of the LCD 3,
Turning on the display units 20 and 22 and turning off the display unit 21 indicates that the image stabilization system can operate, and turning on the display units 20, 21 and 22 disables the image stabilization system. Indicates that. Display unit 23, 2
Numerals 4 and 25 indicate the shake amount allowable value (the shake amount allowable as a photograph) that differs depending on the mounted lens, and any one of them is turned on depending on the type of the mounted lens.

Further, the display unit 26 changes the number of lit elements according to the output of the camera shake amount detection circuit 2 to display the amount of camera shake, and the display unit 23,
From the display of the permissible camera shake amount of 24 and 25, it is shown to the user whether or not the amount of camera shake is within an allowable range. next,
The display unit 27 changes the number of elements to be turned on according to the size of the difference between the output value of the camera shake amount detection circuit 2 and the camera shake correction amount obtained from the output of the lens position detection circuit 7, and the camera shake amount remaining after camera shake correction. And the display of the allowable amount of camera shake on the display units 23, 24, 25, it is shown to the user whether the amount of camera shake remaining after camera shake correction is within an allowable range.

The operation of the camera shake display device of this embodiment will be described in detail below with reference to the flow charts shown in FIGS. It should be noted that the processing shown in these flowcharts shows only the part related to the present embodiment in the program built in the CPU 1. Figure 3
This shows the overall flow of the operation of this embodiment. When the main switch SW12 is turned on, the process starts (step S100).

First, communication with the mounted lens is performed, and the allowable amount of camera shake is displayed from the read data (step S101). Details will be described later with reference to FIG.
Next, it is determined whether the half-press switch SW13 is on or off (step S102). If the half-press switch SW13 is off, the process proceeds to step S106. On the other hand, when the half-push switch SW13 is on, the release switch SW1
4 is turned on or off (step S103), and if the release switch SW14 is off, the process returns to step S102.

If the release switch SW14 is on, exposure processing is performed (step S104). In this exposure process, the amount of camera shake detection, camera shake correction control,
Although processing such as displaying the amount of camera shake during exposure is also performed, details will be described later with reference to FIGS. 5 and 6.

When the exposure process is completed, the film winding process is performed (step S105), and then the main switch S
It is determined whether W12 is on or off (step S106). If it is on, the process returns to step S102, and if it is off,
A series of processes related to the present embodiment is finished (step S107). FIG. 4 is a sub-flow of the lens communication process of step S101 of FIG. 3, in which communication with the mounted lens is performed, the type of the mounted lens, the mounted state, etc. are determined from the read data, and The allowable amount of camera shake is displayed on the LCD 3 in each case.

This series of processing is performed in step S10 of FIG.
It is started by the call 1 (step S200). First, all the displays on the display units 20 to 27 of the LCD 3 are temporarily turned off (step S201). Next, it is determined whether communication with the lens is possible (step S202).

This determination is made by the storage circuit 4 of the photographing lens unit B.
It is performed by reading the data from, and when no data is sent, it is determined that communication is impossible, and when data is sent, it is determined that communication is possible. If the communication with the lens is not possible, it is determined that the lens is not attached to the camera body A, and step S20 is performed.
In step 8, LC is set to 0, and in step S214, the series of processes shown in FIG. 4 ends (step S214).

Note that LC is the name of a predetermined RAM incorporated in the CPU 1, and putting 0 in LC means storing 0 in the predetermined RAM. On the other hand, when the communication with the lens is possible, the camera shake amount allowable value data is read from the storage circuit 4 (step S203).

Here, in a lens designed in consideration of the anti-vibration function, a suitable hand-shake amount allowable value of the lens is set in advance.
The allowable value is stored in the storage circuit 4, and this allowable value is not stored in other lenses. Next, it is determined whether or not there is data for the allowable amount of camera shake (step S204). If there is no data, the display unit 24 of the LCD 3 is turned on in step S205.

In this embodiment, when there is no data on the allowable amount of camera shake, the LCD is set as an intermediate allowable value.
Although the display unit 24 of No. 3 is lit, it may be set to a larger allowable value or a smaller allowable value. Next, 1 is put into LC (step S209), and then L
The display units 20, 21, 22 of the CD 3 are turned on (step S212).

As a result, the user is informed that the mounted lens is a lens that cannot perform camera shake correction, that is, a lens that does not have a vibration isolation mechanism. By this processing, the series of processing in FIG. 4 is finished (step S214). on the other hand,
If there is data of the allowable amount of camera shake in step S204, one of the display units 23, 24, 25 of the LCD 3 corresponding to the read allowable amount of camera shake is turned on (step S206).

Next, it is determined whether the lens is a camera shake-correctable lens (step S207). If the lens is not a camera shake correction lens, the process proceeds to step S210. If it is a camera shake correction lens, the process proceeds to step S211. Here, the storage circuit 4 determines whether the lens is an image stabilization lens.
In advance, the data indicating whether or not the camera shake can be corrected is stored in advance, and the CPU 1 reads the data.

If it is not a camera shake correction lens, LC
2 (step S210), and then the display units 20, 21, 22 of the LCD 3 are turned on (step S21).
2) As a result, the user is informed that the attached lens is a lens that cannot perform image stabilization, that is, a lens that does not have a vibration isolation mechanism, and the series of processing in FIG. 4 ends (step S214).

On the other hand, in the case of a camera shake correction lens,
Put 3 in LC (step S211) and turn on the display units 20 and 22 of the LCD 3 so that the mounted lens is a lens capable of image stabilization, that is, a lens having an image stabilization mechanism. Is notified, and the series of processing in FIG. 4 is finished (step S214). As described above, in the series of processes shown in FIG. 4, when the lens is not attached, when the lens is attached, the image stabilization amount is not included, and when the lens is attached, the image stabilization amount is not included. Divided into four cases, a lens without vibration reduction function with tolerance data and a lens with vibration reduction function with camera shake tolerance data when the lens is attached.
I put 1, 2, and 3.

When the lens is not attached, the display of the allowable amount of camera shake and the display of whether camera shake correction is possible or not are not performed. On the other hand, when the lens shake is not included in the shake amount allowable value data in the storage circuit 4, a predetermined predetermined shake amount allowable value is displayed, and when the shake amount allowable value data is stored in the storage circuit 4, The allowable amount of camera shake corresponding to the allowable value is displayed.

Further, when the lens is attached and the lens is not a shake-correctable lens, that is, a lens having a vibration-proof function, a display indicating that the shake-correction is impossible is displayed.
In the case of a lens having an image stabilization function, a display indicating that camera shake correction is possible is displayed. FIG. 5 and FIG. 6 are sub-flows of the exposure process of step S104 of FIG. 3, and in this flow, processes such as exposure process, detection of camera shake amount during exposure, camera shake correction control, display of camera shake amount during exposure, etc. Is performed, and the processing is started by the call in step S104 in FIG. 3 (step S300).

First, it is determined whether LC is 0 (step S301). If LC is 0, that is, if the lens is not attached, the process proceeds to step S305 and L
When C is not 0, that is, when the lens is attached, the camera shake amount detection circuit 2 is operated to start camera shake detection (step S302). Next, it is determined whether or not LC is 3 (step S303). If LC is not 3, that is, if the lens does not have an image stabilization function, the process proceeds to step S305. When LC is 3, that is, If the lens has an image stabilization function, the image stabilization circuit 5 is operated to start image stabilization (step S30).
4).

Next, the opening of a shutter (not shown) is started (step S305), the shutter time elapses (step S306), and when the time elapses, the shutter is closed (step S307). After that, it is determined whether LC is 3 (step S308), and if LC is not 3, that is, if the lens does not have the image stabilizing function, the process proceeds to S310. When LC is 3, that is, If the lens has a shake function, the operation of the shake correction circuit 5 is stopped and the shake correction is ended (step S309).

Next, it is judged whether or not LC is 0 (step S310). When LC is 0, that is, when the lens is not attached, this series of processing is terminated (step S311), The process proceeds to step S105 of FIG. On the other hand, when LC is not 0, that is, when the lens is attached, the operation of the camera shake amount detection circuit 2 is stopped and the camera shake detection is ended (step S312).

After that, during the exposure, to be exact,
The amount of camera shake detected by the camera shake amount detection circuit 2 from step S304 to step S312 is displayed on the display unit 26 of the LCD 3 (step S313 in FIG. 6). At this time, the display unit 26 of the LCD 3 is changed in the number of elements to be turned on according to the detected camera shake amount, and is turned on sequentially from the left.

Here, the camera shake amount detected by the camera shake amount detection circuit 2 is different from the camera shake amount during exposure to be precise,
The processing from step S302 to step S305,
By making the time required for the processing from steps S307 to S312 so small as to be negligible as compared with the exposure time,
The detected shake amount can be made substantially equal to the shake amount during the exposure time.

In this embodiment, the amount of camera shake during exposure is simply obtained from the difference between the maximum and minimum values of camera shake during exposure. First, in detecting the amount of camera shake, the CPU 1 monitors the output value of the camera shake amount detection circuit 2 between step S302 and step S312 in FIG. 5, stores the maximum value and the minimum value of the value, and stores the difference between them. It is performed by setting the amount of camera shake during exposure.

After the amount of camera shake is displayed on the display unit 26 of the LCD 3, it is determined whether LC is 3 (step S314). If LC is not 3, that is, if the lens does not have a vibration isolation function. Ends this series of processes (step S316) and proceeds to the process of step S105 of FIG. On the other hand, when LC is 3, that is, in the case of a lens having an image stabilization function, the actual camera shake correction amount detected by the lens position detection circuit 7 is subtracted from the detected camera shake amount, that is, the camera shake. The amount of camera shake remaining after correction is L
Display on the display unit 27 of the CD 3 (step S31
5).

Although the camera shake correction amount detected by the lens position detection circuit 7 is different from the camera shake correction amount during exposure to be exact, the processing from step S304 to step S305 and the processing from step S307 to step S309 are performed. By reducing the time required for processing to a negligible amount compared to the exposure time, assuming that the detected camera shake correction amount is approximately equal to the camera shake correction amount during the exposure time, the amount obtained by subtracting this camera shake correction amount from the camera shake amount. Can be approximately equal to the amount of camera shake remaining after camera shake correction during exposure.

The amount of camera shake remaining after camera shake correction is displayed by changing the number of elements to be turned on according to the amount of camera shake remaining after camera shake correction, and turning on the display sequentially from the left, as in the case of the display unit 26 of the LCD 3. Further, in this embodiment, the detection of the shake correction amount during exposure is simply obtained from the difference between the maximum value and the minimum value of the shake correction amount during exposure.

That is, the output value of the lens position detection circuit 7 between step S304 and step S309 in FIG.
It is monitored by PU1, the maximum value and the minimum value of the values are stored, and the difference is used as the shake correction amount during exposure. When the amount of camera shake remaining after camera shake correction is displayed on the display unit 27 of the LCD 3, this series of processing ends (step S31).
6), the process proceeds to step S105 in FIG.

As described above, in the series of processes shown in FIGS. 5 and 6, when the lens is attached, the amount of camera shake during exposure is displayed after the exposure, and the attached lens is a lens having an image stabilizing function. In this case, in addition to that, the amount of camera shake remaining after the camera shake correction during exposure is also displayed. Further, when the lens is not attached, the amount of camera shake during exposure and the amount of camera shake correction remaining after camera shake correction during exposure are not displayed.

However, in the above-described camera shake display device,
Since it is displayed on the display units 20, 21 and 22 whether or not camera shake correction is possible, when the photographer mounts the photographing lens,
It is easy to determine whether or not camera shake correction is possible. Also,
When the photographing lens is not attached to the camera body, the display units 20 to 27 are turned off, so that it is easily understood that the reason why the shake correction cannot be performed is that the photographing lens is not attached.

Further, when a photographing lens having no data indicating the allowable amount of camera shake is attached, the display unit 2
A predetermined predetermined shake amount allowable value is displayed in one of 3, 24 and 25, and when a photographing lens having data indicating the shake amount allowable value is attached, the shake amount of the photographing lens is Since the allowable amount of camera shake is displayed on one of the display units 23, 24, and 25 based on the data indicating the allowable value, the allowable amount of camera shake of the photographing lens can be reliably displayed.

Further, since the remaining shake amount obtained by subtracting the shake correction amount from the shake amount is displayed on the display unit 27, the shake amount remaining after the correction, that is, the shake amount remaining on the photographed screen can be known. It should be noted that in the above-described embodiment, the allowable value of the displayed shake is determined by the display units 23, 24,
Although there are three ways displayed in 25, the allowable value may be two ways, or four or more ways.

Further, in the above-mentioned embodiment, the liquid crystal display element is used as the display means, but the display may be performed by using another display element such as an LED. further,
The storage circuit 4 may be a one-chip microcomputer having a storage unit, or the one-chip microcomputer may be configured to control the operations of the camera shake correction circuit 5 and the lens position detection circuit 7.

Further, in the above-described embodiment, an example in which the camera shake amount detection circuit 2 for detecting the camera shake amount is arranged in the camera body A is explained.
It may be arranged at. Further, in the above-described embodiment, an example in which it is displayed that the image stabilization can be performed by turning on the display units 20, 21 and 22 and that the image stabilization cannot be performed by turning on the display units 20 and 22 has been described. , When the camera shake correction is possible, it may be displayed by ○, and when the camera shake correction cannot be performed, it may be displayed by × so that the display of the display unit in the lighting state can be switched. For example, the camera shake correction can be performed. It may be possible to switch between the lit state and the extinguished state by turning on the light only when it is impossible to turn it off when camera shake correction cannot be performed.

[0055]

As described above, in the camera shake display device according to the first aspect, when the photographing lens having no data indicating the camera shake amount allowable value is attached, a predetermined camera shake amount allowable value is set in advance. Is displayed, and when the photographic lens having the data indicating the allowable amount of camera shake is attached, the allowable amount of camera shake is displayed based on the data indicating the allowable amount of camera shake of the photographic lens. The allowable amount of camera shake can be displayed reliably.

In the camera shake display device according to the second aspect, the display is turned off when the photographing lens is not attached to the camera body, so that it is possible to prevent the photographer from making a mistake that the photographer can take a photograph. Hand shake display device according to claim 3, Ta
The allowable amount of camera shake for the shadow lens can be compared with the amount of camera shake.
Therefore , the amount of camera shake remaining after correction can be easily recognized .

[0057]

[0058]

[Brief description of drawings]

FIG. 1 is a circuit block diagram showing a camera provided with an embodiment of a camera shake display device of the present invention.

FIG. 2 is an explanatory diagram showing an example of a display on the LCD of FIG.

FIG. 3 is a flowchart showing the overall operation of the image stabilization display device of FIG.

FIG. 4 is a flowchart showing details of lens communication processing in FIG.

FIG. 5 is a flowchart showing details of the exposure processing of FIG.

FIG. 6 is a flowchart showing details of the exposure processing of FIG.

[Explanation of symbols]

1 CPU 2 Shake amount detection circuit 3 LCD 4 memory circuits 5 Image stabilization circuit 6 Shake correction motor 7 Lens position detection circuit 8, 9, 11 shooting lens 10 Image stabilization lens SW12 main switch SW13 Half-push switch SW14 Release switch

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI // H04N 5/225 H04N 5/225 A 5/232 5/232 Z (72) Inventor Akira Katayama 3 Marunouchi, Chiyoda-ku, Tokyo No. 2 and 3 in Nikon Corporation (56) Reference JP 4-69627 (JP, A) JP 2-30 (JP, A) JP 3-100634 (JP, A) JP 2 -126253 (JP, A) JP-A-4-9832 (JP, A) JP-A-2-312451 (JP, A) JP-A-1-303417 (JP, A) JP-A-1-123219 (JP, A) ) Japanese Patent Laid-Open No. 5-289139 (JP, A) Actual development 61-158772 (JP, U) Actual development 60-100731 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G03B 5/00-7/28 G03B 17/04-17/20 G03B 17/36 H04N 5/222-5/257

Claims (3)

(57) [Claims] 1. A judging means for judging whether or not a photographing lens detachably attached to a camera body has data indicating an allowable value of a shake amount suitable for the lens, and a shake amount allowance by the judging means. When it is determined that a photographic lens that does not have data indicating a value is attached, a predetermined predetermined amount of allowable camera shake amount is displayed , while a photographic lens having data indicating the allowable amount of camera shake is attached. When it is determined that the camera shake amount is allowed, a display means for displaying the camera shake allowable value based on the data showing the camera shake allowable value of the taking lens, and a camera shake display device comprising: 2. A photographing lens detachable from a camera body,
Mounting determination means for determining whether or not the camera body is mounted, and turning off the display of the display means when the mounting determination means determines that the photographing lens is not mounted on the camera body The camera shake display device according to claim 1, further comprising: 3. A camera shake amount display means for displaying a camera shake amount, which is a displacement amount of a camera body or a photographing lens provided in the camera body, and a camera shake amount for comparing and displaying the camera shake amount allowable amount and the camera shake amount. The camera shake display device according to claim 1, further comprising: an allowable amount display means.