JP2966421B2 - Camera exposure compensation device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an exposure correction device for a camera, and more particularly to an exposure correction device whose exposure correction value can be changed.

`` Prior art and its problems '' In recent years, still video cameras have an automatic exposure device that performs a photometric operation according to the brightness of a subject, and automatically sets an aperture, a shutter speed, an integration time of an image sensor, and the like based on the exposure value. In many cases, an exposure compensating device is provided which can manually perform exposure compensation when the subject is backlit.

Some conventional exposure correction devices have a fixed exposure correction value and cannot be changed in accordance with a drawing intention and a shooting environment, and others have the same.

Those that cannot be changed have a single operation switch and are easy to operate, but have the problem that the best exposure cannot be obtained. On the other hand, those that can be changed have many switch operations,
There is a problem that a complicated operation is required to change and cancel the correction value.

"Object of the Invention" The present invention has been made in order to solve the problems of the above-described conventional exposure compensation device for a camera, and is capable of changing an exposure compensation value, and in which the change operation is simple. The purpose is to provide.

[Summary of the Invention] In the present invention that achieves the above object, there is provided a light meter for measuring the luminance of a subject, an automatic exposure unit for performing exposure with an exposure value based on a light measurement result of the light meter, and the automatic exposure unit. A release switch for operating the camera, and an exposure compensating means for compensating the exposure value by a predetermined value.
Exposure compensation value change switch means for causing the exposure compensation means to change the exposure compensation value; and when the exposure switch is operated, the exposure compensation value can be changed by the exposure compensation value change switch means. It is characterized in that it is provided with an exposure correction switch means for causing the exposure correction means to correct the exposure value when operated.

According to the exposure compensation device of the present camera having the above configuration,
Since the exposure correction value can be changed by a single exposure value change switch means, the operation is simplified.

"Examples of the Invention" The present invention will be described below with reference to the illustrated examples.

FIG. 2 is a perspective view showing the appearance of a still video camera to which the present invention is applied, as viewed from the rear.

This still video camera has a rectangular parallelepiped camera body.
The camera body 10 has a lid 11 on the upper left side of the camera body 10 for attaching and detaching a magnetic disk.

The storage 11 has a disk holder on the inner surface, and holds the magnetic disk mounted on the disk holder in a loading state in a closed position and in an unloading state in an open position. The lid 11 is always urged to rotate in the opening direction by a spring member, but is locked by a lock mechanism in the closed position. This lock is released by the eject button 12.

A battery lid 13 for attaching and detaching a battery is provided on the left side of the longitudinal side of the camera body 10, and a finder eyepiece 14 is provided on the right side of the side.

An LCD panel 15 as display means is provided substantially at the upper center of the side surface on which the finder eyepiece 14 is provided. As shown in FIG. 4, the LCD panel 15 is composed of a number of segments for displaying various information such as the number of recorded tracks, a shooting mode, a recording / reproducing mode, and a calendar of year, month, day, hour, minute and second.

Various switches are provided below the LCD panel 15. Power switch 16 from the left, a pair of up switches
Up / down switch 17 composed of 17a and down switch 17b, mode switch 18 as mode change operating member
And a select switch 19 as a select operation member. The up / down switch 17 functions as an exposure correction value change switch for changing the exposure correction value in the shooting mode (record mode).

Power switch 16 is a slide switch that stops at two positions, ON / OFF, up / down switch 17, mode switch 1
8. Select switch 19 is a normally open push button switch.

On the upper right side of the camera body 10, a release button 20 is provided. Further, a flash switch 21 and an exposure compensation switch 22 are provided around the release button 20, and a zoom switch including a pair of a tele switch 23a and a wide switch 23b is provided in front of the release button 20.
23 are provided.

The release button 20 is a well-known two-stage push button switch, and when half-pressed (first stage), the play switch SWP is turned on,
When fully pressed, the release switch SWR turns on. Strobe switch 21, exposure compensation (E
F) The switch 22 and the zoom switch 23 are normally open push button switches.

A dubbing / monitor changeover switch 25, an AV output connector 26 and a DC input jack 27 as means for connecting to an external device are provided on a lateral side surface of the camera body 10. A monitor / dubbing changeover switch 25 is a slide switch for switching a signal output to the AV output connector 26 into a composite output signal or an audio output signal (monitor) of a signal recorded on the magnetic disk 37 and a demodulated signal (dubbing). It is.

The above is the outline of the external appearance of the illustrated embodiment.
At the front of 10, a photographic lens (zoom lens 30), a strobe (light emitting unit 52), a finder, a projection / light receiving window for distance measurement, and the like are provided.

Next, a configuration of an optical system, a control system, and the like of the present still video camera will be described with reference to FIG.

A stop 31 is provided behind the zoom lens 30, and a CCD image sensor 32 is further provided behind the stop 31. The subject image is captured by the CCD image sensor 32 by the zoom lens 30.
Is formed on the light receiving surface of

The integration and charge transfer of the CCD image sensor 32 are controlled and driven by a system control circuit 33 via an imaging circuit.

The charge stored in the CCD image sensor 32 is
4 and output from the imaging circuit 34 to the video recording / reproducing circuit 35 as an image signal. This image signal is subjected to predetermined processing in a video recording / reproducing circuit 35 to be converted into a luminance signal Y, a color difference line-sequential signal (BY, RY), a data signal, further FM-modulated, and a magnetic head. 36 through magnetic disk 37
On a predetermined track.

The magnetic disk 37 is driven to rotate in a spindle mode 38, and the rotation of the spindle motor 38 is controlled by a spindle motor drive circuit 39. The drive of the spindle motor drive circuit 39 is controlled by the system control circuit 33. The spindle motor drive circuit 39
Receives the feedback of the pulse generated by the PG coil 40 in accordance with the rotation of the magnetic disk 37, and
The servo circuit controls the phase by a PG pulse signal and the rotation speed by an FG signal from the spindle motor 38.

The magnetic head 36 is moved (accessed) on the track of the magnetic disk 37 by the tracking control circuit 41 to perform recording and reproduction. As is well known, there are field recording and frame recording. Also magnetic head
36 is moved one track at a time by operating the up / down switch 17.

42 is a loading switch, which is a magnetic disk 37
Is detected, and a detection signal is output to the system control circuit 33.

In the zoom lens 30, the zoom lens group is moved by a zoom motor 43, and the focusing lens group is moved by an AF (auto focus) drive circuit 44. The aperture 31 is driven to open and close by an aperture drive circuit 45. The drive of the zoom motor 43, the AF drive circuit 44, and the aperture drive circuit 45 is controlled by the system control circuit 33.

Further, the present still video camera includes a photometric sensor 46, a color temperature sensor 48, and an AF sensor 50 as sensors.

The subject luminance signal output from the automatic photometry sensor 46 as a sensor of the photometry calculation means is logarithmically compressed and A / D converted by the photometry circuit 47, and then the system control as a main element of the photometry calculation means and the automatic exposure means is performed. circuit
Output to 33. The system control circuit 33 performs a predetermined photometric operation based on the signal, and sets the aperture value of the aperture 31 and the integration time of the CCD image sensor 32 which constitute the automatic exposure means.

The color temperature signals (blue (B) and red (R)) output from the color temperature sensor 48 are logarithmically converted by the color temperature detection circuit 49 and then output to the system control circuit 33. The system control circuit 33 performs a comparison operation between the blue and red color temperature signals to perform white balance adjustment.

The AF sensor 50 is a triangular distance measuring sensor having a light emitting unit and a light receiving unit. The subject distance signal output from the distance measurement sensor 50 is processed into a distance signal by the AF detection circuit 51 and output to the system control circuit 33. The system control circuit 33 calculates the amount of movement of the focusing lens group from the distance signal, moves the focusing lens group to the focusing position via the AF drive circuit 44, and focuses the image.

Further, the present still video camera has a strobe.
Light emission control of the strobe light emitting unit 52 is performed by the system control circuit 33 via the strobe control circuit 53. In the present embodiment, there are an auto mode in which light is emitted automatically when the subject brightness falls below a certain value, an on mode in which light is forcibly emitted regardless of the subject brightness, and an off mode in which no light is emitted at all. The auto mode, the on mode, and the off mode are switched by operating the strobe switch 21.

Further, the present still video camera can record and reproduce sound in addition to recording an image. However, only a reproducing circuit is shown for an audio circuit. The recording of the sound uses one track of the magnetic disk 37 as in the case of the image recording. However, the configuration and the operation are well-known, and are not the gist of the present invention, and are not necessary for understanding, and therefore, the description is omitted.

An audio reproduction circuit 54 is connected to the video recording / reproduction circuit 35. The video recording / reproducing circuit 35 controls the magnetic head 36 during reproduction.
If the read signal is an audio signal, the audio signal is output to the audio reproduction circuit 54.

The audio reproduction circuit 54 has an A / D converter, a RAM, and a D / A converter. At the time of reproduction, the demodulated audio signal from the video recording / reproducing circuit 35 is converted into a digital signal, stored in a memory, expanded in time,
An analog signal is output as an audio output.

Further, an AV output connector 26 is connected to the video recording / reproducing circuit 35 and the audio reproducing circuit 54 via the monitor / dubbing changeover switch 25.

Note that the system control circuit 33 is a microcomputer having a CPU, a ROM, a RAM, and the like, which controls the entire still video camera and the like, but includes a plurality of mode setting means such as a shooting mode by a built-in program. It also has a function as mode changing means.

Next, a configuration of a display relationship which is a feature of the present invention will be described. FIG. 3 shows a front view of the LCD panel 15. The characters and figures shown in the outline of the LCD panel 15 are formed of liquid crystal elements, the white portions are light-transmitting portions, that is, unlit portions, and the black portions are light-absorbing portions, that is, lighted portions. FIG. 3 shows an unrecorded magnetic disk 37.
Is loaded, and the power switch 16 is turned on. When the power switch 16 is turned off, the other display disappears except the display of "88-09-12" (year, month, day) which is a calendar display.

The display on the LCD panel 15 can be classified into six display sections for displaying main functions, modes and the like. For each display section, the mode or value displayed there can be changed. To change or set it, use the select switch 19 or the up / down switch 17
Is performed by the pressing operation. The switching operation of the display section is performed by pressing the mode switch 18.

Then, during the switching operation, the set or value setting display flashes to indicate that the mode is the setting mode. Hereinafter, each display will be described in relation to functions.

FIG. 4 shows a display section related to the strobe. The illuminated display “AUTO” indicates a strobe auto mode in which the strobe light emitting unit 52 automatically controls light emission when the subject brightness falls below a certain value.

If the strobe switch 21 is pressed here, the auto display “AUTO” disappears and the display “ON” lights. This display "O
"N" indicates that the flash mode is set to the flash mode in which the flash unit 52 emits light regardless of the luminance of the subject while the release button 20 is pressed.

When the flash switch 21 is pressed again, the flash mode is set and the display "OFF" is lit. This display “OFF” indicates that even if the subject brightness is lower than the certain value,
This indicates that the electronic flash unit 52 is in a flash off mode in which the electronic flash unit 52 does not emit light.

FIG. 5 shows a shooting track number / exposure compensation display section disposed below the strobe display section. The lit display “01” in FIG. 5A means that the track to be recorded is the first track. Every time the release button 20 is pressed and the exposure and recording processes are executed, the subject image is recorded (photographed) on one track, and the display changes to a display obtained by adding "02", "03", ... by one. .

When the exposure compensation switch 22 is turned on, the number of tracks to be shot and exposure compensation display section changes to a display "+1.5" relating to exposure compensation (EF) (see FIG. 5 (B)). This display “+1.5” indicates that overexposure is performed by +1.5 EV from the appropriate exposure value.

Although the above-mentioned +1.5 EV is the standard exposure correction value, in this embodiment, the set value can be changed in 0.5 EV steps within a range of ± 2 EV. This changed value is displayed on the exposure display section and stored in a memory in the system control circuit 35.

If it is different from the standard value, an exposure correction value change display "± EF" below the display "+" is lit (see FIGS. 5 (C) and (D)). If the exposure compensation value is not a standard value, the above display “± EF” is displayed even if the display returns to the shooting track display.
Lights up to notify the photographer that the exposure correction value is not the standard value (see FIG. 5 (E)).

The change of the exposure correction value is performed by pressing the up / down switch 17 while the exposure correction switch 22 is turned on (exposure correction value change mode). When the up switch 17a is turned on, it increases to +2.0 in 0.5 increments, and when the down switch 17b is turned on, -2 in 0.5 increments.
Down to 0.

The figure imitating the battery disposed next to the exposure compensation value change display "± EF" (see FIG. 3) is lit when the remaining battery power is low in the battery remaining amount warning display.

FIG. 6 shows a photographing mode display section disposed on the right side of the strobe display section.

FIG. 6A shows the single mode. Single mode is when the release button 20 is fully pressed (when the release switch SWR changes from off to on)
In this mode, one frame is recorded.

FIG. 6B shows the self-timer mode.

FIGS. 6C to 6E show one frame per second,
This indicates that the camera is in a continuous shooting mode in which continuous shooting (recording) of two frames or five frames is possible. The continuous shooting mode is a mode in which recording is continuously performed on condition that the release switch 20 is turned on.

The setting change of the shooting mode is performed by pressing the select switch 19 in the shooting mode change mode. Each time the select switch 19 is turned on once, the blinking display changes from the single mode to the timer mode → 1 frame / second continuous shooting mode → 2 frame / second continuous shooting mode → 5 frame / second continuous shooting mode / single mode Moving.

7 to 10 show a recording / playback mode display section disposed below the shooting mode display section. This still video camera has a normal record mode in which only images are recorded as a recording mode, an AV / record mode in which images and sounds are recorded, an erasing mode in which recording on a track is erased for each track as an erasing mode, and a playback mode. Mode. Further, in the recording mode, there is a monitor mode for monitoring an image to be recorded. Then, the respective modes are displayed in the recording / reproducing mode display section.

In the normal record mode, the displays "NORMAL" and "REC" are lit (see FIG. 7 (A)). In the AV / record mode, the displays "AV" and "REC" are lit (FIG. 7 (B)). See).

In the erase mode, the display “ERASE” lights up (Fig. 7 (C)
), The reproduction mode is indicated by lighting of the display “PLAY” (see FIGS. 8 (A) and 9 (A, B)).

The monitor mode is indicated by lighting of the display "MONITOR" (see FIGS. 8 (C, D) and 9 (A, B)).

The shooting mode setting mode has a plurality of modes. In a normal shooting state in which the AV connector is not connected to the AV output connector 26, a display as shown in FIGS. 7A to 7C is made. FIG. 7A shows a normal record mode, FIG. 7B shows an AV record mode, and FIG. 7C shows an erase mode.

When the AV connector is connected to the AV output connector 26, the eighth
The display mode is as shown in FIGS. FIG. 8A is a reproduction mode, FIG. 8B is an erasing mode, and FIG. 8C.
Is the normal record monitor mode, and FIG. 8 (D) is
AV / record monitor mode.

The upper recording / reproducing mode is changed by pressing the select switch 19 in the recording / reproducing mode changing mode. Further, each time the select switch 19 is turned on, the display is (A) → (C) → (A) in FIG. 7 and (A) → (D) → (A) in FIG. Circulates in the order of

FIG. 9 (A, B) is a display of the standby and playback states in the playback mode. When the reproduction mode is set in the recording / reproducing mode change mode, a reproduction standby state is set, and the reproduction display “PLAY” flashes (see FIG. 9A). Here, when the release button 20 is turned on (play switch SWP), the reproduction starts, and the reproduction display “PLAY” changes to a dot or the like (see FIG. 9B).

FIG. 10 (A, B) shows the display in the normal record monitor mode. When the normal record monitor mode is set in the recording / playback mode change mode, the monitor enters the monitor standby mode and displays "NORMAL" and "MONITOR"
Flashes (see FIG. 10 (A)). Here, when the release button 20 (play switch SWP) is turned on, monitoring is started, and the displays "NORMAL" and "MONITOR" change to lighting (see FIG. 10 (B)).

FIG. 11 (A to E) shows a white balance mode display section disposed below the recording / reproducing mode display section.

The display “WB” at the left end indicates that the white balance is being adjusted. Next to "WB", display "AUTO" indicating automatic adjustment, display "(cloud picture)" indicating cloudy sky mode, display "(sun picture)" indicating clear sky mode, fluorescent light mode And ("Picture of an incandescent lamp") indicating an incandescent lamp.

The adjustment of the white balance is set to any one of the auto, cloudy, clear, fluorescent, and incandescent modes, and the display unit that has been set is turned on. The setting operation is performed by pressing the select switch 19 in the white balance change mode. Each time the select switch 19 is pressed, the flashing mode changes from auto to cloudy → sunny → fluorescent →
It changes by circulating from incandescent light to auto (Fig. 11 (AE)
reference).

FIG. 12 and FIG. 13 show a calendar display section disposed below the white balance display section. This calendar display section displays either “year / month / day” or “hour / minute / second”, and always displays “year / month / day / day” regardless of the ON / OFF of the power switch 16 while the battery is loaded. "Or" hours, minutes, and seconds "are displayed.

FIG. 12 shows the display of “year, month, day”, and indicates that the date is September 12, 1988.

FIG. 13 is a display of hours, minutes and seconds, indicating that the time is 11:34:57. The hyphen display “−” disposed between the numbers indicates “year, month, day” display, and the colon display “:” indicates “hour, minute, second” display.

The adjustment of “year, month, day” or “hour, minute, second” is performed by pressing the up / down switch 17 in the calendar change mode. When the calendar change mode is set by pressing the mode switch 18, the date
If it is a display, the hyphen display "-" starts blinking, and if the display is "hour, minute, second", the colon display ":" starts flashing (see FIGS. 12 (A) and 13 (A)). ).

When the select switch 19 is pressed once in this state, the year (hour) display on the left end starts blinking. Then, every time the select switch 19 is pressed, the blinking display section shows the year (hour) →
The cycle moves in the order of month (minute) → day (second) → all lights → year (hour).

When the up / down switch 17 is pressed during the blinking,
The numerical value on the display changes cyclically within a certain range. For example, when the up switch 17a is pressed while the month display is blinking (FIG. 13 (C)), "10" → "11" → "12" → "0"
When the down switch 17b is pressed in the order of "1", the circular movement is performed in the order of "08" → "07".

The rectangular graphic display provided on the right side of the calendar display section indicates whether or not the magnetic disk 37 is loaded, and is turned on when the loading switch 42 is turned on.

The mode change mode circulates and changes as described below by the pressing operation of the mode switch 17.

First, the magnetic disk 37 is loaded and the power switch 16
Is turned on, the LCD panel 15 is turned on without blinking as shown in FIG.

When the select switch 19 is pressed once in the above state, the mode is changed to the shooting mode, and the display of the shooting mode display section changes from lighting of the single mode display section to blinking of the self-timer mode display section (FIG. 6 (B)). reference). When the select switch 19 is pressed, the blinking display sequentially circulates as described above.

When the mode switch 18 is pressed in the flashing state of the shooting mode display section or in the initial state, the flashing display section changes to a lit display, the setting mode changes to the recording / reproducing mode change mode, and the recording / reproducing mode display section (normal The display changes to blinking (record mode display) (see FIG. 7 (A)).

When the mode switch 18 is pressed in the above state, the flashing display section changes to a light-on display, the setting mode changes to the white balance mode setting mode, and the display of the white balance mode display section flashes (see FIG. 11 (A)). ).

When the mode switch 18 is pressed, the blinking display changes to a lighted display, the setting mode changes to a calendar change mode, and the “year, month, day” display in the calendar display section blinks (see FIG. 12 (A)). Changes to

When the mode switch 18 is pressed, the blinking display in the calendar display section changes to a blinking “hour, minute, second” display.
(See FIG. 13 (B)).

When the mode switch 18 is pressed here, the blinking “hour, minute, second” display mode in the calendar display section changes to a lit display, the mode setting mode changes to the shooting mode setting mode, and the display in the shooting mode display section changes. It changes to blinking. That is, each time the mode switch 18 is turned on, the mode setting mode changes in order.

When the release button 20 (play switch SWP) is turned on in the blinking state, the mode change is released,
All display sections change to blinking display.

Further, in the one cycle state, the display of the calendar display section is switched from the “year / month / day” display mode to the “hour / minute / second” display mode.

When the pressing operation of the mode switch 18 is repeated again and the circuit makes one cycle, the display of the calendar display section returns from the “hour, minute, second” display mode to the “year, month, day” display mode.

That is, the display of “year, month, day” and “hour, minute, second” in the calendar display section are switched by pressing the mode switch 18. The calendar display 0 in this embodiment is driven and controlled by a so-called auto calendar circuit in the system control circuit 33.

Next, the basic operation of the still video camera having the above configuration will be described.

When the magnetic disk 37 is loaded, the loading detection switch 42 is turned on, and the system control circuit 33 knows this.

When the power switch 16 is turned on in this state, the spindle motor 38 starts and the magnetic disk 37 starts rotating at a predetermined rotation speed. Then, the magnetic head 36 accesses the first (outermost) track, and it is checked whether the track has been recorded. This check is performed by causing the magnetic head 36 to function as a reproducing head and by the system control circuit 33 determining whether the magnetic head 36 has picked up a track signal.

The magnetic head 36 is stopped there if it is an unrecorded track, but is moved to the next track if it is a recorded track, and it is checked whether or not it is recorded as described above. Then, the magnetic head 36 is stopped at the first unrecorded track. With this, the cueing of the magnetic head 36 is completed.

The track number at which the magnetic head 36 has stopped is indicated by the LC number.
The number is displayed in the shooting track number / exposure compensation display section of the D panel 15.

When the release button 20 is turned on in this state, the play switch SWP is turned on in a half-pressed state, the photometry circuit 47, the AF detection circuit 51, and the color temperature detection circuit 37 are operated, and the photometry calculation, the distance measurement calculation, and the white balance are performed. The calculation is performed by the system control circuit 33.

Then, based on the above calculation result, the diaphragm 31 is moved to the diaphragm driving circuit.
The aperture is opened to a predetermined aperture value by 45, the 30 focusing lenses are moved to the focusing position by the AF drive circuit 44, and the white balance adjustment value of the imaging circuit 34 is determined. Here, when the photometric value is lower than a certain value, that is, when the subject is dark, the flash control circuit 53 is activated, and charging is started.

When the release button 20 is further pressed and the release switch SWR is turned on, the integration start and stop processing of the CCD image sensor 32 is performed, and the image signal output from the CCD image sensor 32 is output to the imaging circuit 34 and the video recording / reproduction circuit 35.
Performs a predetermined process, and the magnetic head 36 records the data on one track of the magnetic disk 37.

When the recording is completed, the magnetic head 36 is moved to the next track, and the display in the shooting track number display section of the LCD panel 15 is changed to a display of a value obtained by adding one.

The above is the standard shooting operation. It should be noted that the present still video camera can record "year, month, day" or "hour, minute, second" as a data signal when recording an image.

For playback, connect the input AV connector of a monitor TV, etc.
Connect to AV output connector 26. Then, the connector attachment detection switch 56 is turned on. This ON is detected by the system control circuit 33, the recording / reproducing mode is switched to the reproducing mode, the recording / reproducing mode display section of the LCD panel 15 is switched to the reproducing mode display, and the display "PLAY" blinks (FIG. 8 ( A)).

When the release button 20 is pressed in this playback mode, the signal on the track is read by the magnetic head 36 and output to the video recording / playback circuit 35. The signal is determined by the video recording / reproducing circuit 35 as an image signal or an audio signal.

If it is an audio signal, it is output to the audio reproduction circuit 54 and the monitor / dubbing switch 25. The audio signal is temporarily recorded in a memory in the audio reproducing circuit 54, expanded from the memory, and output to the monitor / diving switch 25.

If it is an image signal, it is demodulated and separated, and the luminance signal Y
The signal is output to the monitor / dubbing changeover switch 25 as + S and the color difference signal LSC, and as they are encoded composite signals.

From the monitor / dubbing changeover switch 25, output is made to the AV output connector 26 as follows. If the dubbing mode is selected, the audio signal is output from the audio reproduction circuit 35, and the image signal is the AV signal of the luminance signal Y + S and the color difference signal LSC.
If the signal is output to the output connector 26 and switched to the monitor side, the audio signal is output from the image recording / reproducing circuit 35 and the image signal is output to the AV output connector 26 as a composite signal. Thus, in the case of dubbing, a signal immediately after demodulation is output, so that dubbing can be performed with a signal having less distortion and noise.

When the connector attachment detection switch 56 is not turned on, that is, when the AV connector is not connected to the AV output connector 26, the reproduction mode cannot be set by operating the mode switch 18. This prevents useless operation and battery consumption.

Next, the mode change operation of the still video camera and the operation of the system control circuit 33 relating to the display thereof will be described with reference to the flowcharts of FIGS. 14 to 20, but before that, the main operation of the system control unit 33 will be described. Will be described briefly.

The system control circuit 33 has a CPU as described above, and operates according to the program written in the ROM of the CPU to implement the exposure correction operation and the exposure correction value changing operation of the present invention.

When the power switch 16 is turned on, a mode setting bit, an interrupt enable bit and other conditions are initialized. The memory related to the number of photographed tracks is initialized when the loading switch 42 is turned off or the magnetic disk 37 is ejected.

After the above initialization, the cueing process of the magnetic head 36 and the LCD
The display on panel 15 is executed. After the cueing is completed, the interval timer is started, and at predetermined time intervals, each switch 18,
Execute the input processing of 20 to 23.

If any of the switches are on, the subroutine for the on switch is interrupted and its processing is executed. For example, if the zoom switch 23 is on, the zooming subroutine is interrupted and the zoom lens group is moved via the zoom motor driving circuit 43 to perform zooming. If the release button 20 (play switch SWP) is turned on in the record mode, the shooting subroutine is interrupted, and the exposure processing such as the AF processing, the photometry calculation processing, the aperture operation processing, the integration processing, the white balance adjustment processing, and the like to the magnetic disk 37 are performed. And the like. Mode switch 18
If is turned on, the mode setting subroutine is interrupted and the mode setting process is executed.

When the power switch 16 is turned on and predetermined conditions are initialized, the mode number M is set to 0.
The mode number M is counted up every time the mode switch 18 is turned on, and its value changes cyclically in the range of 0-4.

N is a select number, and select numbers N (0), N (1), N (2), N corresponding to the mode number M
(3) and N (4). The select value for each select number N is counted up each time the select switch 19 is turned on, and changes cyclically in the range of 0-4. The display mode of the LCD panel 15 is defined by the value of the select number N.

The display on the LCD panel 15 in the initial state is as shown in FIG. 5. When the up / down switch 17 is operated, the magnetic head 37 is sequentially moved to the outer or inner track, and the select switch 19 is turned on. Then, the shooting mode is changed.

Since the detailed operation of the above routine is unnecessary for understanding the present invention, a detailed description will not be given.

Next, an operation performed by the system control circuit 33 in the mode change processing will be described with reference to FIG.

When the mode switch 18 or the select switch 19 is turned on, the process interrupts the mode change subroutine.

In step 100, it is checked whether the AV connector is connected to the AV connector 26 (whether the AV terminal is ON), that is, whether the connector attachment detection switch 56 is ON. If it is on, the process proceeds to step 101; if it is not on, the process proceeds to step 102.

In step 101, the normal record mode is set, and the recording / playback mode display section of the LCD panel 15 is displayed (N
ORMAL REC ”is lit, and the routine proceeds to step 104.

In step 102, the recording / playback mode is set to the playback mode, and L
Display the recording / playback mode display section of the CD panel 15 "PLAY"
Blinks and proceeds to step 103.

In step 103, the mode number M is set to 1, and the process proceeds to step 104. That is, when the AV connector is connected to the AV output connector 26, the mode number M is automatically set to 1 and the apparatus enters a recording / reproducing mode setting mode described later.

In step 104, it is checked whether the mode switch 18 is on. If yes, step 10
Proceed to 7, and if not on, proceed to step 105. That is, the process proceeds to step 107 while the mode switch 18 is kept pressed.

In step 105, it is checked whether the power switch 16 is on. If it is not on, the process proceeds to the END process. If it is on, the process proceeds to step 120. The END process is a process for exiting from this subroutine. When exiting from the subroutine, the process enters a standby state before entering this routine.

In step 107, it is checked whether the power switch 16 is on. If it is on, step 110
To step 108 if not on.

In step 108, it is checked whether the mode number M is smaller than 3. If it is smaller, the process proceeds to step 109. If it is not smaller, the process jumps to step 111. Step 1 above
When the subroutine is entered when the power switch 16 is turned off by the processing of steps 07 to 109, the mode number is set to 3, and only the calendar change processing described later is executed. As a result, while the mode switch 18 is kept on, the mode change mode is circulated and changed for a predetermined time.

In step 109, the mode number M is set to 3, and the process proceeds to step 111.

In step 110, the mode number M is incremented by one, that is, the mode is advanced by one. Then, the process proceeds to step 111.

In step 111, it is checked whether or not the mode number M is 3. If it is 3, the process proceeds to the END process. If it is not 3, the process proceeds to step 112.

In step 112, it is checked whether or not the mode number M is 4. If it is 4, the process proceeds to step 113. If it is not 4, the process proceeds to step 116.

In step 113, it is checked whether the flag A is set. Step if not set
Go to 114 and set, if set, step 115
Go to and reset. The flag A is a flag for switching the display of the calendar display section between “year, month, day” and “hour, minute, second”. Therefore, step 11
The flag A is inverted in the processing of 3 to 115, and the display modes of the select numbers (3) and (4) (“year / month / day” display and “hour / minute / second” display) are switched.

When the processing of steps 114 and 115 is completed, the processing proceeds to the END processing.

At step 116, select number N (3) is set to 0, and the routine proceeds to step 117. In step 117, the select number N (4) is set to 0, and the process proceeds to step 118.

In step 118, it is checked whether the mode number M is equal to or greater than 6. If YES, proceed to step 119, if NO, proceed to END processing.

In step 119, the mode number M is set to 0, and the process proceeds to the END process. That is, when the mode switch 18 is pressed five times (four times when the AV connector is connected to the AV output connector 26), the count value of the mode number M is returned from 4 to 0.

Select switch 19 when checking step 106
If is turned on, the process proceeds to step 120.

In step 120, the select number N (M) is incremented by one. That is, the select number N is set to a value corresponding to the mode number M. Then, the process proceeds to step 121.

In step 121, it is checked whether or not the mode number M is 0. If the value is 0, the process proceeds to the shooting mode change subroutine of step 122 because the mode is the shooting mode change mode.

In step 123, it is checked whether the mode number M is 1. If it is 1, since it is the recording / reproducing mode setting mode, the process proceeds to the recording / reproducing mode setting subroutine of step 124.

In step 125, it is checked whether the mode number M is 2. If it is 2, since it is the white balance mode change mode, the process proceeds to the white balance mode change subroutine of step 126. If it is not 2, the process proceeds to step 127.

In step 127, it is checked whether the mode number M is 3 or 4. If YES, the process proceeds to the calendar setting subroutine of step 128 because the mode is the calendar setting mode. If NO, the process proceeds to step 129.

In step 129, the mode number M is set to 0, and the process proceeds to the END processing.

When the release switch SWR is turned on after the execution of the END process, the mode change mode is released.

Next, the above mode change processing will be described with reference to FIGS.
This will be described with reference to the drawings. When the processing shown in FIGS. 15 to 18 is entered, the photographing mode can be changed, the recording / reproducing mode can be changed, the white balance mode can be changed, and the calendar display can be changed.

After power switch 16 is turned on, select switch
When 19 is turned on once or the mode switch 18 is turned on five times and the select switch 19 is turned on once, it is checked in step 121 that the mode number M is 0, and the photographing mode change in step 122 is performed. Subroutine (15th
Figure).

In the shooting mode change subroutine, first, step 130
It is checked whether or not the select number N (0) is 1. If it is 1, the process proceeds to step 131, and if it is not 1, the process proceeds to step 132.

In step 131, a self-timer mode setting process is executed, and the shooting mode display section of the LCD panel 15 is changed to the sixth mode.
After the change in the diagram (B), the process proceeds to the END process.

At step 132, it is checked whether or not the select number N (0) is 2. If it is 2, the process proceeds to step 133, and if it is not 2, the process proceeds to step 134.

In step 133, one frame / second continuous shooting mode is set, and the shooting mode display section of the LCD panel 15 is changed to the display of FIG. 6 (C) before proceeding to the END process.

In step 134, it is checked whether or not the select number N (0) is 3. If it is 3, the process proceeds to step 135, and if it is not 3, the process proceeds to step 136.

In step 136, 2 frames / sec continuous shooting mode setting is executed, the shooting mode display section of the LCD panel 15 is changed to the display of FIG.

At step 136, it is checked whether or not the select number N (0) is 4. If it is 4, the process proceeds to step 137. If it is not 4, the process proceeds to step 138.

In step 137, 5 frames / sec continuous shooting mode setting is executed, the shooting mode display section of the LCD panel 15 is changed to the display of FIG.

At step 138, select number N (0) is set to 0, and the routine proceeds to step 139. That is, select switch 1
When 9 is pressed five times, the select number (0) is returned from 4 to 0.

In step 139, the single shooting mode is set, and L
Fig. 6 (A) shows the shooting mode display section of the CD panel 15.
And then go to END processing.

In short, in the shooting mode setting mode, each time the select switch 19 is turned on, the shooting mode is changed from the single mode to the self-timer mode → 1 frame / second continuous shooting mode → 2 frame / second continuous shooting mode → 5 frame / second continuous The mode is switched in the order of the shooting mode, the single mode, and so on.

As described above, after the power switch 16 is turned on, in a state where the AV connector is not attached to the AV connector 26, the select switch 19 is pressed, or the mode switch 18 is pressed five times, and the select switch 19 is pressed once. This is a shooting mode setting process when the camera is set.

Next, processing when the mode switch 18 is pressed once after the power switch 16 is turned on will be described with reference to FIG.

When the mode switch 18 is depressed once, the mode number M becomes 1, so that the recording / reproducing mode change subroutine from step 123 to step 124 is entered.

In the recording / reproducing subroutine, first, at step 140, it is checked whether or not the connector mounting detection switch 56 is turned on. That is, it is checked whether the AV connector 26 is connected to the AV connector 26 or is in a monitor or dubbing state. If it is on, the process jumps to step 146. If it is not on, the process proceeds to step 141.

In step 141, it is checked whether the select number N (1) is 1, that is, whether the select switch 19 is pressed once. If the select switch 19 has been pressed once, the process proceeds to step 142; otherwise, the process proceeds to step 143.

In step 142, the AV / record mode setting is executed, and L
The display of the recording / playback mode display section of the CD panel 15 is switched to the display of FIG. 7 (B), and the process proceeds to the END processing.

In step 143, it is checked whether or not the select number N (1) is 2, that is, whether or not the select switch 19 has been pressed twice. If the select switch 19 has been pressed twice, the process proceeds to step 144; otherwise, the process proceeds to step 145.

In step 144, the erase mode is set and the LCD panel
The 15 recording / playback mode display sections are switched to the display in FIG. 7 (C), and the routine jumps to step 153.

In step 153, the select number N (1) is set to 0, that is, the counter is reset to 0 when the select switch 19 is pressed three times.
To Then, the process proceeds to the END processing.

In step 145, the normal record mode is set, the recording / reproducing mode display section is switched to the display shown in FIG. 7A, and the process proceeds to the END process.

If the AV connector is connected to the AV connector 26, the process jumps from step 140 to step 146 as described above.

As described above, when the AV connector is connected to the AV output connector 26, the process jumps from step 140 to step 146.

In step 146, it is checked whether the select number N (1) is 1, that is, whether the select switch 19 has been pressed once. If the select switch 19 has been pressed once, the process proceeds to step 147; otherwise, the process proceeds to step 148.

In step 147, the erase mode is set, the recording / reproducing mode display section of the LCD panel 15 is switched to the display of FIG. 8B, and the process proceeds to the END processing.

In step 148, it is checked whether the select number N (1) is 2, that is, whether the select switch 19 has been pressed twice. If the select switch 19 has been pressed twice, the process proceeds to step 149; otherwise, the process proceeds to step 150.

In step 149, record / normal / monitor mode setting is executed, the recording / reproducing mode display section of the LCD panel 15 is switched to the display shown in FIG.

In step 150, it is checked whether or not the select number (1) is 3, that is, whether or not the select switch 19 has been pressed three times. If the select switch 19 has been pressed three times, the routine proceeds to step 151, and if not, the routine proceeds to step 152.

In step 151, the AV / record / monitor mode is set, the recording / reproducing mode display section of the LCD panel 15 is switched to the display shown in FIG.

At step 152, the reproduction mode is set, the recording / reproducing mode display section is switched to the display of FIG. 8A, and the routine proceeds to step 153.

In step 153, the select number N (1) is set to 0 as described above. Then, the process proceeds to the END processing.

In short, in the upper recording re-mode change subroutine, AV
When the AV connector is not connected to the output connector 26, every time the select switch 19 is turned on, the mode is switched from the record / normal mode in the order of AV / record mode → erase mode → record / normal mode →.

On the other hand, when the AV connector is connected to the AV output connector 26, the reproducing mode is set, and every time the select switch 19 is turned on, the recording / reproducing mode is changed from the reproducing mode to the erasing mode → record / normal monitor mode → record / AV.・
The mode is switched in the order of monitor mode → reproduction mode →.

Next, the processing when the mode switch 18 is pressed twice after the power switch 16 is turned on will be described with reference to FIG.

When the mode switch 18 is pressed twice, the mode number M becomes 2, so that the white balance (WB) mode change subroutine from step 125 to step 126 is started.

In this white balance mode change subroutine,
First, at step 160, it is checked whether or not the select number N (2) is 1, that is, whether or not the select switch 19 has been pressed only once. If the select switch 19 has been pressed only once, the process proceeds to step 161; otherwise, the process proceeds to step 162.

In step 161, the white balance mode is set to the first manual (cloudy) mode, the white balance display section is changed to the display of FIG. 11 (B), and the process proceeds to the END process.

In step 162, it is checked whether or not the select number N (2) is 2, that is, whether or not the select switch 19 has been pressed twice. If the select switch 19 has been pressed only twice, the process proceeds to step 163; otherwise, the process proceeds to step 164.

In step 163, the white balance mode is set to the second manual (sunny) mode, the white balance display section is changed to the display of FIG. 11 (C), and the process proceeds to the END process.

In step 164, it is checked whether the select number N (2) is 3, that is, whether the select switch 19 has been pressed three times. If the select switch 19 has been pressed three times, the process proceeds to step 165; otherwise, the process proceeds to step 166.

In step 165, the white balance mode is set to the third manual (fluorescent) mode, the white balance display section is switched to the display of FIG.
Proceed to D processing.

In step 166, it is checked whether or not the select number N (2) is 4, that is, whether or not the select switch 19 has been pressed four times. If the select switch 19 has been pressed four times, the process proceeds to step 167; otherwise, the process proceeds to step 168.

In step 167, the white balance mode is set to the fourth manual (incandescent lamp) mode, the white balance display section is switched to the display of FIG.
Proceed to D processing.

At step 168, the select number N (2) is set to 0, that is, the counter is set to 0, and the routine proceeds to step 169.

In step 169, the auto white balance mode is set, the white balance display section is switched to the display of FIG. 11A, and the process proceeds to the END process.

In short, in this white balance change subroutine, every time the select switch 19 is pressed, the white balance mode is changed from the auto mode to the cloudy WB mode to the fine WB mode.
The mode is switched in the order of mode → fluorescent light WB mode → incandescent light WB mode → auto WB mode →….

Next, the processing of the calendar change subroutine when the mode switch 18 is pressed three or four times after the power switch 16 is turned on will be described with reference to FIG.

When the mode switch 18 is pressed three or four times, the mode number M becomes 3 or 4, so that the process enters the calendar change subroutine from step 127 to step 128.

In the calendar change subroutine, first, step 170
It is checked whether the value of the select number (3) or (4) is 1, that is, whether the select switch 19 has been pressed once. If the select switch 19 has been pressed once, the process proceeds to step 171; otherwise, the process proceeds to step 174.

In step 171, it is checked whether the flag A is set. Step if not set
Proceed to 173, and if set, proceed to step 174.

In step 172, the "hour" change mode setting is executed, and the CLD
The calendar display section of panel 15 is switched to the display of FIG. 13 (B), and the process proceeds to END processing.

In step 173, the “year” change mode setting is executed, and 15
Is switched to the display of FIG. 12 (B), and the process proceeds to the END processing.

At step 174, it is checked whether or not the select number N (3) or (4) is 2. If it is 2, the process proceeds to step 175. If it is not 2, the process proceeds to step 178.

In step 175, it is checked whether the flag A is set. If it is not set, the process proceeds to step 176 because "minute" is displayed. If it is set, the process proceeds to step 177 since "month" is displayed.

In step 176, the minute change mode is set, the calendar display section of the LCD panel 15 is displayed as shown in FIG. 13 (C), and the process proceeds to the END process.

In step 177, the “month” change mode setting is executed, and the LCD
The calendar display section of panel 15 is switched to the display of FIG. 12 (C), and the process proceeds to END processing.

In step 178, it is checked whether the value of the select number N (3) or (4) is 3, that is, whether the select switch 19 is pressed three times. If the select switch 19 has been pressed three times, the process proceeds to step 179. If the select switch 19 has not been pressed three times, the step mode switch 18
Proceed to 2.

In step 179, it is checked whether the flag A is set. Step if not set
Proceed to 180, and if set, proceed to Step 181.

In step 180, the “second” change mode setting is executed and the LCD
The calendar display section of panel 15 is switched to the display of FIG. 13 (D), and the process proceeds to END processing.

In step 181, the "day" change mode setting is executed, and the LCD
The calendar display section of panel 15 is switched to the display of FIG. 12 (D), and the process proceeds to END processing.

In step 182, the value of the select number N (3) or (4) is set to 0, and the process proceeds to step 183.

In step 183, the calendar change mode is canceled, the blinking of the calendar display section is stopped, the data set in the mode setting process is displayed, and the process proceeds to the END process.
That is, when the select switch 19 is pressed four times, the calendar display is canceled.

In the calendar change subroutine, when the flag A is set, that is, when “year / month / day” is displayed, every time the select switch 19 is turned on, the blinking display (change data) changes from year → month → date → (Settings) → Cycles in order of year. When the flag A is reset, that is, when “hour, minute, second” is displayed, the blinking display (change data) is circulated in the order of hour → minute → second (setting) → hour every time the select switch 19 is turned on. Moving.

When the up / down switch 17 is turned on in the blinking state, the blinking display data is sequentially moved up or down each time the up / down switch 17 is turned on.

In the above mode setting subroutine, when the release switch SWR is turned on after the execution of the END processing, if a blinking display is present, the mode or value of the blinking display is set, and the blinking changes to lighting.

Next, the operation of the system control circuit 33 when the AV connector is connected to the AV connector 26 will be described with reference to the flowchart shown in FIG.

This routine starts when the magnetic disk 37 is loaded, the power switch 16 is turned on, the connector attachment detection switch 56 is turned on, and the play switch SWP is turned on.

In this routine, first, at step 191, it is checked whether or not the mode is the record mode. If the mode is not the record mode, the process proceeds to step 192. If the mode is the record mode, the process proceeds to step 197.

In step 192, it is checked whether the mode is the reproduction mode. If not in playback mode, proceed to step 193,
If it is the reproduction mode, the process proceeds to step 203.

In step 193, it is checked whether the mode is the monitor mode. If it is not the monitor mode, the process proceeds to the END process. If it is the monitor mode, the process proceeds to step 194.

In step 194, it is checked whether the monitor start flag has been set. If it is set, the monitor process has already been executed, so the process proceeds to the END process. If it has not been set, the process proceeds to step 195.

At step 195, a monitor start flag is set, and the routine proceeds to step 196.

In step 196, the monitor is started. Then, the process proceeds to the END processing. Here, the monitor is a mode in which an image signal output from the CCD image sensor 32 and an audio signal output from a recording device (not shown) are output to the AV output connector 26.

As described above, in the record mode, the process proceeds from step 191 to step 197. In a step 197, a photometric calculation process is executed, in a step 198, a color temperature detection and a white balance value setting process are executed, and in a step 199, a distance measurement and a focusing process are executed.

In step 200, it is checked whether or not a flash is emitted. If the light is not emitted, the process proceeds to step 201;

In step 201, flash charging is stopped, and in step 202, flash charging is started, and the process proceeds to END processing.

When the END process is performed in the record mode in this manner, when the release button 20 is fully pressed and the release switch SWR is turned on, the exposure and recording processes are performed.

In the case of the playback mode, the above steps 192 to 2
Go to 03. In step 203, it is checked whether the reproduction start flag has been set. If the reproduction start flag has been set, the process proceeds to step 204; otherwise, the process proceeds to step 207.

In step 204, the reproduction start flag is reset, and the process proceeds to step 205.

In step 205, a mute signal indicating the standby state is output, and the process proceeds to step 206.

In step 206, the mode number M value is set to 1 and the LCD
The display “PLAY” on the panel 15 flashes (see FIG. 9A), and the process proceeds to the END process.

At step 207, a reproduction start flag is set, and the routine proceeds to step 208.

In step 208, the magnetic head 36 accesses a predetermined track, rotates the magnetic disk 37 to read a signal recorded on the track, and executes a reproduction start process of outputting the signal to the AV connector 26, and proceeds to step 209.

In step 209, the mode number M is set to 0, and the display "PLAY" on the LCD panel 15 is turned on (see FIG. 9 (B)).
Then, the process proceeds to the END processing.

Next, the operation of the system control circuit 33 relating to the display of the exposure correction value change mode shown in FIG.
Description will be made based on the flowchart shown in the figure.

When the exposure compensation switch 22 is turned on, the process enters this exposure compensation value setting subroutine.

In this subroutine, first, in step 210,
Check if you are in record mode. If it is in the record mode, the process proceeds to step 211; if not, the process proceeds to the END process.

In step 211, an exposure correction (EF) on flag indicating that the exposure correction (EF) is being performed is set, and in step 21
Proceed to 2. The exposure value is corrected at the time of exposure by setting the exposure correction on flag.

In step 212, it is checked whether the exposure correction value change flag is set. That is, it is checked whether the exposure correction value has changed from the standard +1.5 EV. If it has changed, the process jumps to step 214, and if it has not changed, the process proceeds to step 213.

In step 213, the exposure compensation value is set to + 1.5EV,
Proceed to step 214.

In step 214, it is checked whether the up switch 17a is on. If on, step 215
If not, go to step 216.

In step 215, the up switch on flag is set, and the flow advances to step 218.

In step 216, it is checked whether the down switch 17b is on. If it is on, the process proceeds to step 217, and if it is not on, the process jumps to step 218.

At step 217, the down switch ON flag is set, and the routine proceeds to step 218.

In step 218, it is checked whether the exposure correction on flag is set. If it is set, the process proceeds to step 219; if it is not set (because the exposure compensation switch 22 is turned off), the process proceeds to the END process.

In step 219, an exposure correction value change flag is set. Then, the process proceeds to step 220. When this exposure correction value change flag is set, the exposure correction value change display "± EF" is turned on (see FIGS. 5 (C) to (E)).

In step 220, it is checked whether the up switch on flag is set or the down switch on flag is set. If the down switch on flag is set, proceed to step 221; if the up switch on flag is set, step
Proceed to 224.

In step 221, the exposure correction value is reduced by 0.5, and the process proceeds to step 222.

In step 222, it is checked whether the exposure correction value is smaller than -2.0. If smaller, go to step 223,
If not, jump to step 227.

In step 223, the exposure correction value is set to -2.0. That is, the lower limit of the exposure correction value is restricted to -2.0. And
Proceed to step 227.

In step 224, the exposure correction value is increased by 0.5, and the process proceeds to step 225.

In step 225, it is checked whether the exposure correction value is larger than +2.0. If it is larger, the process proceeds to step 226;

In step 226, the exposure correction value is set to +2.0. That is, the upper limit of the exposure correction value is defined as +2.0. And
Proceed to step 227.

In step 227, it is checked whether or not the exposure correction value is +1.5 (standard value). Step 22 if standard value
Proceed to 8 and proceed to END processing if it is not a standard value.

In step 228, the exposure correction value change flag is reset. That is, the exposure correction value change display “± EF” is turned off, and the process proceeds to the END process.

This subroutine is repeatedly executed at predetermined time intervals while the exposure correction switch 22 is on.

According to the embodiment having the above configuration, the exposure compensation switch
Since the exposure correction value can be changed by pressing the up / down switch 17 while pressing 21, the operation of changing the exposure correction value is easy. Moreover, since the up / down switch 17 is also used as the exposure correction value changing means, the number of switches is reduced as a whole camera.

If the exposure compensation value is changed from the standard value +1.5 EV, the LCD panel 1
“± EF” in the track number and exposure compensation value display section of 5
Since the display is turned on, the user can know in advance that the exposure correction value has been changed from the standard value.

In this embodiment, the standard value of the exposure correction value is set to +1.5 EV, which is most frequently used in backlight, and the correction range is ± 2.0 EV.
The correction value is changed in steps of 0.5 EV, but is not limited to these values.

Although the present invention has been described based on the embodiment applied to a still video camera, a similar effect can be obtained by applying the present invention to a silver halide camera.

"Effects of the Invention" As is apparent from the above description, according to the exposure compensation apparatus for a camera of the present invention, the exposure compensation value can be changed by the exposure compensation value change switch means, and the ON / OFF of the exposure compensation can be set by the exposure compensation switch means. , The operation relating to the exposure correction is simplified, and the photographing can be performed with the optimum correction value.

Also, when the exposure correction value is changed from the standard value, if the changed display is displayed on the display means, the user can be notified in advance that the exposure correction value has changed, thereby preventing failure of the exposure correction. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a still video camera to which the present invention is applied, viewed from the rear, FIG. 2 is a block diagram showing an outline of an internal system of the still video camera, and FIG. FIG. 4 (A, B, C) is an enlarged front view showing an LCD panel of the still video camera, and FIG. 5 (A, B, C) is a view showing a strobe display section of the LCD panel in different mode displays. , D, and E) show the same number of shots and exposure main correction value display section in different display modes, and FIG. 6 (A, B, C, D, and E) show different modes of the shooting mode display section. FIG. 7 (A, B,
C), FIG. 8 (A, B, C, D), FIG. 9 (A, B), and FIG. 10 (A, B) show recording / playback mode display sections in different mode displays. , FIG. 11 (A, B, C, D, E) shows the white balance display section in different mode displays, and FIG. 12 (A, B, C, D) shows the calendar display section.
FIG. 13 (A, B, C,
D) is a diagram showing the calendar display section in the hour, minute, and second display mode. FIGS. 14A and 14B are flowcharts of the mode change operation. FIG. 15 is a flowchart of the photographing mode change operation. FIG. 17 is a flowchart of a recording / reproducing mode changing operation, FIG. 17 is a flowchart of a white balance mode changing operation, FIG. 18 is a flowchart of a calendar changing operation, FIG. 19 is a flowchart of a reproducing mode operation, and FIG. 9 is a flowchart of an exposure correction value changing operation. 10 Camera body, 15 LCD panel, 16 Power switch, 17 Up / down switch (exposure compensation value change switch means), 18 Mode switch 19 Select switch, 20 Release button, 22 Exposure compensation switch (exposure compensation switch means) 33 ... System control circuit (photometry operation, automatic exposure, exposure compensation, exposure compensation value changing means) 37 ... magnetic disk,

Continued on the front page (72) Inventor Kimiaki Ogawa 2-36-9 Maenocho, Itabashi-ku, Tokyo Asahi Optical Industry Co., Ltd. (72) Inventor Makoto Mogamiya 2-36-9 Maenocho, Itabashi-ku, Tokyo Asahi Inside Optical Industry Co., Ltd. (56) References JP-A-62-272781 (JP, A) JP-A-62-272769 (JP, A)

Claims (2)

(57) [Claims] A photometer for measuring the brightness of a subject; an automatic exposure device for performing exposure with an exposure value based on a photometric result of the photometer; a release switch for operating the automatic exposure device; Exposure compensation means for compensating the value;
An exposure compensation value change switch means for causing the exposure compensation means to change the exposure compensation value; and, when operated, the exposure compensation value changeable by the exposure compensation value change switch means. And an exposure compensation switch means for causing the exposure compensation means to correct the exposure value when the release switch is operated. 2. The exposure compensating means according to claim 1, wherein said exposure compensating means has a standard exposure compensation value, and said exposure compensating means is provided when said release switch is operated while said exposure compensating switch means is being operated. Wherein the exposure compensation is performed using the standard exposure compensation value or the exposure compensation value changed by the exposure compensation value change switch means.