DE3943664C2 - Electronic still picture camera - Google Patents

Abstract

For determining the method of use of a still picture video camera, a control element and a selector switch are incorporated.After adjustment to a required function, a single element is released for carrying out the function. The camera can be switched between receiving and reproducing operations, and a visual display indicates various functions such as automatic on or off, record and erase, also time/data functions, and normal and monitor operation.Also included is a computing system for automatic exposure, the exposure being controlled according a calculated exposure value. The image can be reproduced on external equipment, by switching from receiving to reproduction, and electrically connecting the equipment to the camera

Description

The invention relates to a single image video camera according to the preamble of claim 1.

More recently, multi-function cameras have been used each function several changeable operating modes and includes a variety of changeable settings, popular become. For example, there are single image Video cameras operating in the SINGLE IMAGE mode (one picture each), SERIES PICTURE (continuous Operation to take a series of pictures) and SELF-TIMER work. Additionally contains one Camera usually has an operating mode type of white balance the operating modes AUTO, CLOUDY, BEAUTIFUL, ARTIFICIAL L and GLÜHLICHT, a recording mode with IMAGE and  AUDIO RECORD, a playback mode type for playback a recorded sound or image signal and one Time / date function for displaying or recording the Date and time.

Changing one of these modes is becoming more common wise by pressing several switches on the camera housing done. There are many of them Actuators required the operating modes and change the operating mode types of the camera. Thus the Number of actuators of a camera with the Number of operating mode types or operating modes. Furthermore So far, different combinations of several Actuators used to change the Operating modes and the operating mode types of the camera chen.

However, the large number of actuators has increased led to a problem because users cannot understand or keep which actuator for a given result must be activated. That's why can fail a desired image or a bad one Record arise.  

Single-frame video cameras have been developed with which a video signal or a sound signal is recorded and can be played. With such a camera the user switches between recording and playback by operating an external switch. That's why it is necessary to add an additional one to the camera housing Chen switch with which manually between the is switched over in both operating modes. This manual Switching has the handling of such a camera white complicated.

It is also in single-frame video cameras with which one Picture z. B. recorded on a magnetic disk and can be reproduced by it, typically a Spindle motor provided the magnetic disk when playback turns on, turns around a magnet head to activate the information of this on reproduced the drawing medium. Such a facility however, forces the user to choose between recording and how switchover manually.

If this manual operation is missing, the Spindle motor continue to turn the magnetic disk, as long as the camera remains in playback mode, too if the recorded information is not viewed becomes. Thus, the one intended for power supply Battery is used up and the possible operating time of the Camera shortened. An additional switch for Control of engine operation in the playback state would however, increase the space requirement of the camera.  

Cameras were also developed in which the up recorded signals to an external facility be used when the camera is in shooting mode to monitor the recording process. At such a camera is an up acquisition / monitoring switch normally provided that when monitoring the devices of the camera Information recording, recording and playback so continue to be activated. This additional on acceptance / monitoring switch also affects the compact structure of the camera.  

DE 32 02 765 A1 describes one of several components existing video equipment. Specifically describes a video recording / playback device to which mecha nisch coded connection means optionally a Hochfre quence receiver, a camera or a playback device device can be connected. Through the coded connection with tel is caused to circuit units of video-on recording / playback device in connection with the current connected components are not required, not with Energy are supplied. In the video record / re switching device between recording and playback mode in a conventional manner.

JP 62-272 780 with Patents Abstracts of Japan, Vol. 12 No. 162 E 609 from May 17, 1988 describe a single image video camera with an arrangement for recording video signals, an arrangement for reproducing recorded th video signals, an output device for outputting Video signals and a mode changing device for Setting the change status of one of several operating mode types including playback mode type, where the mode Change device a selection arrangement with an actuator to select one of several Operating modes of each with the help of another Actuator set operating mode type and thus also to select one of several different ones Playback modes when the playback mode type is set.

According to the invention, such a camera is to be further developed in this way det that less actuators are needed.

According to the invention, this is done by a camera with the mark paint the claim 1 reached. Favorable configurations of the Invention are the subject of dependent claims.  

A single-frame video camera according to the invention contains an image acquisition arrangement for generating Video signals of an object to be recorded, an arrangement to record the video signals thus generated a record carrier, an arrangement for playback of the recorded video signals, an arrangement for Output recorded video signals to an external one Device, and an arrangement for switching the Operating mode of the camera from recording to playback, to Activate the playback arrangement if one Connection device of the external device elec is trically connected to the output arrangement, and Switch the operating mode of the camera to recording and to activate the recording device if the connection device from the output arrangement is electrically isolated.

Such a single-frame video camera switches automatically between recording and playback when the Connection device connected to the output arrangement who is separated from her. That's why she needs  Camera no actuator to switch between Recording and playback, which is also a simplified handling and a compact design gives.

The invention also includes a camera that has an arrangement to record video signals on a recording drawing medium, an arrangement for reproducing the recorded signals, an arrangement for optional Change the recording mode in which a recording device is activated, and the playback mode, in which a playback device is activated, and a play initiation switch to activate the Includes playback device, the playback device direction the playback of the recorded signals starts when the initiator switch is selected after Play is pressed.

With such a single-frame video camera, the how is output of the recorded signals from the actuation of the playback initiation switch. Thereby unnecessary electrical power consumption is prevented.

The invention is described below with reference to the drawing explained in more detail. In detail show:

Fig. 1 perspective view of a single video camera after the it invention, seen from behind,

Fig. 2 is a block diagram of the internal Sy stems of the camera of Fig. 1,

Fig. 3 is a LCD display of the camera of Fig. 1,

FIGS. 4A to 4C show representations of various flash light,

Fig. 5A to 5E are representations of the number of shots as well as an exposure compensation value,

FIGS. 6A to 6E showing display of photographic modes,

FIG. 7A to 7C, 8A to 8D, 9A to 9B and 10A to 10B representations of different operating modes Be concerning recording / As dergabe,

FIG. 11A to 11E representations of a white balance in different operating modes,

FIG. 12A to 12D representations of a date / time display in the display of the date,

FIG. 13A to 13D representations of the time / date at the display of the time,

FIG. 14A and 14B are flowcharts for the Betriebsartän alteration,

Fig. 15 is a flowchart of a subroutine for changing the recording mode,

Fig. 16 is a flowchart of a subroutine for switching between recording and As dergabe,

Fig. 17 is a flowchart of a subroutine for changing the white balance,

Fig. 18 is a flowchart of a subroutine for changing the time / date display,

Fig. 19 is a flowchart of a subroutine for changing the reproduction type and

Fig. 20 is a flowchart of a subroutine for changing a onswertes Belichtungskompensati.

In the following the Ka shown in the figures mera described as an embodiment.

Fig. 1 shows in perspective the back of a single image video camera 5 according to the invention. This has a rectangular camera housing 10 with a cover 11 , which is arranged on the top near the left edge of the camera housing 10 . A magnetic storage plate 37 can be inserted into the camera 5 by opening the cover 11 . The inner surface of the cover 11 has a plate holder which holds the magnetic storage plate 37 in the operating position in the closed position. When the lid 11 is opened, it holds the magnetic disk in an output position. The cover 11 is normally biased in the opening direction by a spring. However, it is held in the closed position by a locking mechanism. The locking mechanism is released by pressing an output button 12 on the camera housing 10 .

A battery cover 13 on the back of the camera housing 10 allows the insertion of a battery in the camera. A viewfinder eyepiece 14 and an LCD display 15 are also provided on the back of the camera body 10 . As shown in FIG. 3, the LCD display 15 contains a plurality of display segments for displaying various information such as the number of tracks on which signals have already been recorded, a photographic recording mode of the camera, the recording / playback mode of the camera and a time / date Stamp function that shows the date and time with the appropriate letters or symbols. Several switches are provided under the LCD display 15 . They include a switch 16 , an up / down switch 17 with an up switch 17 a and a down switch 17 b, an operating mode switch 18 , which serves as an operating element for changing the operating mode type, and a selector switch 19 . In the embodiment described here, the A switch 16 is a slide switch with two positions, while the up / down switch 17 , the mode switch 18 and the selector switch 19 are pushbutton switches with make contact.

On the top of the camera body 10 , a release button 20 , a flash light switch 21 , an exposure compensation switch 22 and a zoom switch 23 are provided near the right edge, which consists of a tele switch 23 a and a wide-angle switch 23 b be. The trigger button 20 is a two-stage button in which a control switch SWP is operated when it is only pressed halfway, and a trigger switch SWR is operated when it is fully pressed. The flash light switch 21 , the exposure compensation switch 22 and the zoom switch 23 are normally open pushbutton switches.

On a transverse side of the camera housing 10 , a copy / monitoring switch 25 , an audio-visual output socket 26 (AV socket) for connecting the camera 5 to an external device and a power supply socket 27 are arranged, to which an external power source can be connected . The switch 25 is a slide switch which mation either a composite output signal (or an exclusive audio monitor signal during playback of an audio signal) recorded on the magnetic disk 37 infor or a demodulated signal selects discharged via the AV output terminal 26th

On the front of the camera housing 10 , a zoom lens 30 , a flash unit 52 and the lens of the viewfinder optics as well as light emission and recording windows for the light and object measurement are provided.

As shown in FIG. 2, an aperture 31 and an image sensor 32 are arranged behind the zoom lens 30 , so that an object to be recorded is focused with the zoom lens 30 on the light receiving surface of the image sensor 32 . In the exemplary embodiment shown, a CCD image sensor 32 is provided, but other image sensors such as MOS image sensors can also be used without deviating from the solution according to the invention.

An image forming circuit 34 receives the signal generated by the image sensor 32 , which is then fed to a system control circuit 33 to perform integration (storage of the signal charges) and to transfer the signal charge. A signal charge of each picture element of the image sensor 32 is output to the image forming switch 34 , which outputs the signal charge via the system control circuit 33 to an image pickup reproduction circuit 35 in the form of a video signal. The image pickup reproducing circuit 35 processes the video signal and converts it into a brightness signal Y + S, color difference line signals BY, RY and a data signal. These signals are written after frequency modulation with a magnetic head 36 on a predetermined track of the magnetic disk 37 .

The magnetic disk 37 is rotated by a spindle motor 38 . The speed of rotation of the spindle motor 38 is controlled by a driver circuit 39 , which in turn is controlled by the system control circuit 33 . The pulse generator with a Wick lung 40 during rotation of the magnetic disk 37 erzeug th pulses are supplied to the driver circuit. 39 Thus, the driver circuit 39 works as a servo circuit for controlling the speed of the spindle motor 38 depending on the pulse signal generated by the spindle motor 38 . The magnetic head 36 accesses a track on the magnetic disk 37 under the control of a positioning circuit 41 . The signals are recorded on the magnetic disk 37 either by the field method or by the frame method. The magnetic head 36 is advanced one track at a time by actuating the up / down switches 17 .

A charging switch 42 detects the insertion of the magnetic disk 37 into the camera 5 and generates a detection signal that the system control circuit 33 is guided to.

The zoom lens 30 is constructed so that a variable magnification lens group is moved along the optical axis by a zoom motor 43 , while a focus lens group is moved by an automatic focus driver circuit 44 . The aperture 31 is set by an aperture driver circuit 45 . The zoom motor 43 , the focus driver circuit 44 and the iris driver circuit 45 are controlled by the system control circuit 33 .

The still image video camera further includes a light measurement sensor 46 , a color temperature sensor 48 and a focus sensor 50 . The light measuring sensor 46 receives a bundle of rays which is reflected on the object to be recorded and converts it into a voltage signal which is fed to a light measuring circuit 47 . This converts the voltage signal into a corresponding object brightness of a predetermined form by performing logarithmic compression and analog-digital conversion of the voltage signal. The brightness signal is then output to the system control circuit 33 , where a predetermined exposure calculation is carried out according to the object brightness, so that an aperture value of the aperture 31 and an integration time of the image sensor 32 can be set.

The color temperature sensor 48 responds to the beam and emits signals to a color temperature detection circuit 49 . This converts the color temperature into color temperature signals of a predetermined form by performing a logarithmic conversion. The signals are then output to the system control circuit 33 which compares the blue and red color temperature signals to perform a white balance.

The focus sensor 50 works on the triangle principle and has a light source and a light receiver. An evaluation circuit 51 for the focus setting processes an object distance signal of the focus sensor 50 to a distance signal of a certain shape, which is then fed to the system control circuit 33 . This performs a predetermined operation depending on the distance signal to determine the adjustment of a focus lens group 30 f, which is then brought into focus position by the focus driver circuit 44 .

The flash unit 52 is controlled by the system control circuit 33 via a flash control circuit 53. In the exemplary embodiment shown, there are three operating modes: an automatic flash mode, in which the flash is actuated automatically when the object brightness falls below a predetermined value, and controlled flashing where the flash fires regardless of the brightness of the subject and a shooting mode where the flash is not fired. These three operating modes are selected by the flash light switch 21 .

The single-image video camera 5 according to the invention can not only record and reproduce video signals, but also audio signals. For the sake of simplicity, however, only one sound reproduction circuit 54 is shown in FIG. 2. The sound recording uses a track of the magnetic disk 37 in an arrangement which is known per se. Therefore, the sound reproducing circuit 54 is not further explained here.

The sound reproducing circuit 54 is electrically connected to the image pickup reproducing circuit 35 . If the signal read by the magnetic head 36 during playback is an audio signal, the recording-playback circuit 35 outputs this audio signal to the audio playback circuit 54 .

The sound reproduction circuit 54 includes an analog-to-digital converter, a random access memory (RAM) and a digital-to-analog converter. During sound reproduction, the sound reproduction circuit 54 demodulates the read signal, converts the sound signal provided by the image recording reproduction circuit 35 into a digital signal and stores it. The digital signal is then subjected to an expansion in time and converted back into an analog signal which is output as a sound signal.

The AV output jack 26 is also electrically connected to the image pickup reproduction circuit 35 and the sound reproduction circuit 54 via the copy / monitor switch 25 . The system control circuit 33 includes a microcomputer which comprises various components, namely a central processing unit (CPU), a read-only memory (ROM) and a random access memory (RAM) for controlling the still camera 5 . The microcomputer of the system control circuit 33 can be used as an arrangement for changing several operating modes such. B. work in a photographic mode, which depends on the program contained in it.

The LCD display 15 is a liquid crystal display, but other display types can also be provided, for example an LED display with light-emitting diodes, without deviating from the basic idea of the invention.

In FIG. 3, characters and word elements on the LCD display 15 are shown. White areas correspond to translucent areas where the liquid crystal does not light up. Black filled areas are light absorption areas where the liquid crystal lights up. The display shown in Fig. 3 means that the magnetic disk is loaded in the camera 37 5, the power switch is actuated and no informa tion 16 is recorded on the magnetic disk 37. When the power switch 16 is turned off, all displayed information disappears from the LCD display 15 except for the calendar display 88-09-12, which shows the year, the month and the day.

The LCD display 15 can be divided into six display sections which serve to illustrate the main functions and operating modes of the camera. The display types or operating values can be changed in each display section. The change in the setting of a display type or the operating value, it follows by operating the selector switch 19 or the up / down switch 17 , while the change in the display sections is carried out by operating the operating mode switch 18 . The set or selected display flashes during an operating mode change, which means that this is a selected operating mode. The respective displays are explained below on the basis of their functions.

Fig. 4 shows a display section, associated with the operation of the flash unit 52. In Fig. 4A, AUTO is lit, which means that the flash unit 52 is set to auto flash when the brightness of an object to be shot has dropped below a predetermined value.

When the flash light switch 21 is pressed, the AUTO display is replaced by the ON display, as shown in Fig. 4B. This means that the controlled flash emission was selected, in which when the trigger button 20 is pressed, the flash unit 52 must flash regardless of the brightness of the object.

If the flash light switch 21 is pressed again, the display ON is replaced by the display OFF, as shown in FIG. 4C. This means that the flash unit 52 has been switched off manually, so that no flash is emitted, even if the object brightness is less than a predetermined value. When the flash switch 21 is pressed again, the display returns to the state shown in Fig. 4A. The display and the operating modes therefore run through the cycle AUTO with automatic flashing, ON with controlled flashing and OFF with no flashing when the flash switch 21 is actuated in succession.

Fig. 5 shows a display section for displaying the track number and the exposure compensation value. Fig. 5A shows that the recording on the first track he follows. When field recording is performed, the object to be recorded is recorded on a single track when the release button 20 is pressed to perform exposure and recording processing. If the object is recorded, the display is switched one after the other to show 02, 03, etc. The number shown is increased by 1 in each case. When a full frame recording is made, the object to be recorded is recorded on two tracks. Therefore, the number shown is increased by two, ie 03, 05, etc.

When the exposure compensation switch 22 is closed, the display section for displaying the photographic track number / exposure compensation value is changed so that an exposure compensation value (EF) of +1.5 is displayed as shown in Fig. 5B. The value +1.5 represents that the exposure is increased by the value +1.5 EV compared to the exposure value calculated with the system control circuit 33 . Although +1.5 EV is used as the reference exposure compensation value in this embodiment, it is also possible to increase or decrease the exposure value in steps of 0.5 EV within a range of +2 EV or -2 EV. The exposure compensation value is shown in the display section for displaying the photographic track number / exposure compensation value and at the same time is written into a memory of the system control circuit 33 .

If the exposure compensation value deviates from the reference value, the symbol ± EV provided for this purpose lights up under the symbol +, as shown in FIGS. 5C and D. This display remains even after the display for displaying the photographic track number has been switched. Thus, there is an indication to the user that the exposure compensation value differs from the reference value, as shown in Fig. 5E.

The exposure compensation value is changed by pressing the up / down switch 17 after the exposure compensation switch 22 is turned on (ie, the camera 5 is in the exposure compensation value change mode). Pressing the up switch 17 a increases the exposure compensation value in steps of 0.5 EV up to a maximum of +2.0 EV. Pressing the down switch 17 b reduces the exposure compensation value in steps of 0.5 EV up to a maximum reduced copy tion of -2.0 EV.

The LCD display 15 also includes a battery icon that illuminates to warn the user that the battery is low and should be replaced or recharged.

Fig. 6 shows a display section of the recording mode on the LCD display 15. Fig. 6A shows the frame recording, in which a frame is recorded each time the release button 20 is fully pressed (ie the release switch SWR is turned on). Fig. 6B shows the self-timer operation in which a recording is made within a predetermined time after the shutter button 20 is fully pressed. Fig. 6C, 6D and 6E show the sequential operation of 1 frame / sec, 2 frames / sec and 5 frames / sec. The series mode means that the exposure and the recording can be repeated as long as the release button 20 is fully pressed.

The setting and changing of the above-described recording types are carried out by operating the selector switch 19 when the camera 5 is in the change state for the recording type. The display section for the type of recording is then cyclically controlled by the representations single image, self-timer, 1 image / sec serial image, 2 images / sec serial image and 5 images / sec serial image and then returns to the single image mode, each time the selector switch 19 is actuated, while the camera is in the change state for the shooting mode type.

The single-frame video camera 5 according to the invention has several types of recording, namely the normal recording in which only one image is recorded, the AV recording in which an image and sound are recorded, the erasing operation in which any information present on the magnetic disk is erased and a playback mode in which the recorded image or sound is played back. In addition, the camera has a monitor mode in which the recorded image can be checked at the same time. In Fig. 7 to 10, the different recording / reproducing modes in the display on the LCD display 15 are shown.

The normal recording is represented by the lighting up of the word parts NORMAL and REC, as shown in FIG. 7A. The AV recording is shown by lighting up AV and REC, as shown in Fig. 7B. The erase operation is represented by the lighting up of ERASE, as shown in Fig. 7C. The playback operation is represented by lighting up PLAY as shown in Figs. 8A, 9A and 9B. The monitoring operation is represented by the lighting up of MONITOR, as shown in Figs. 8C, 8D, 9A and 9B.

The setting state for the recording type has several options. The representations shown in FIGS. 7A to 7C apply to the normal recording situation in which the AV socket 26 is not connected to a monitoring device (monitor) in order to display the normal recording, the AV recording or the deletion mode.

If the AV socket 26 is electrically connected to a monitoring device, the indications according to FIGS . 8A to 8D are activated in accordance with the operating mode of the camera 5 . Fig. 8A shows the playback operation, Fig. 8B shows the erase operation, Fig. 8C shows the normal recording / monitoring operation and Fig. 8D shows the AV recording / monitoring operation.

The recording / playback mode is changed by pressing the selection switch 19 when the camera is in the change state for recording / playback. The display is cyclically guided through the states shown in FIGS . 7A to 7C and back to FIG. 7A, each time the selector switch 19 is operated in sequence, as long as the AV socket 26 is not connected to a monitoring device. If this connection is present and the selector switch 19 is pressed, the LCD display 15 is controlled by the states shown in FIGS. 8A to 8D and back to the state shown in FIG. 8A.

In FIGS. 9A and 9B, a playback / ready condition and a reproducing condition are shown when the camera is in the reproduction mode. When the playback mode is set to the change state for recording / playback, the playback indicator PLAY flashes as shown in Fig. 9A. When the release button 20 is pressed in half the stage (which actuates the control switch SWP), the playback of the recorded information begins. PLAY is activated as shown in FIG. 9B.

FIG. 10A and 10B show the normal recording / monitoring. When this mode is set to the change state of recording / playback, NORMAL and MONITOR blink, as shown in Fig. 10A. If the trigger button 20 is actuated (test switch SWP closed), the monitoring starts and NORMAL and MONITOR light up, as shown in FIG. 10B.

FIG. 11A to 11E show various white balance indicators, the cut on a Weißabgleichsanzeigeab the LCD display 15 are provided. The WB symbol relates to white balance. The words AUTO indicate that the camera 5 is in the automatic white balance setting mode. CLOUD means that the camera 5 is set so that the white balance is set to a scene with cloudy weather. SUN means that the camera is set to white balance for a sunny scene. The artificial light symbol indicates that the camera 5 is set to a white balance for a scene with a fluorescent lamp. The incandescent symbol means that the camera is set to white balance for a scene with incandescent lighting.

The white balance can be set to automatic, cloudy weather, sunny weather, fluorescent or incandescent lighting. The display section corresponding to the selected operating mode then lights up. The white balance is set by actuating the selector switch 19 when the camera 5 is in the change state for the white balance. If the selector switch 19 is operated repeatedly, the setting of the white balance is carried out cyclically from automatic to cloudy weather to good weather and fluorescent light and incandescent lighting and then back to automatic.

FIGS. 12 and 13 show a time / date stamp display portion of the LCD display 15 of the camera 5. The time / date stamp display is used to selectively display the date and time. The date or time is always shown on the LCD display 15 as long as the battery is sufficient to operate the camera 5 , regardless of the position of the switch 16 .

Fig. 12 shows a date display September 12, 1988. Fig. 13 shows a time display 11:34:57. Hyphens are provided between the numbers to indicate that the display shows a date. Colons are provided to indicate that the display is showing a time.

The date or time is set by pressing the up / down switch 17 when the camera is in the time / date change state. If the camera is set in the change state for time / date by pressing the operating mode switch 18 , the hyphen symbol for the date display and the colon symbol for the time display flash, as shown in FIGS. 12A and 13A.

When the selector switch 19 is pressed for the first time, the leftmost display section starts to flash, which means that the year or the hour can be set, as shown in Figs. 12B and 13B. Further actuations of the selector switch 19 cause the flashing display section to cycle through the year (hour), month (minute), day (second) and back to year (hour).

If the up / down switch 17 is pressed during the time in which a display section is flashing, a numerical value which is shown in this section is increased within a predetermined range. For example, if the month display flashes, as shown in FIG. 13C, pressing the up switch 17 A causes the numerical value shown to be between 10, 11, 12, 01, 02, 03, 04, 05, 06, 07, 08 and 09 cyclically advanced and then brought back to 10. Pressing the down switch 17 b causes a corresponding change in the numerical value in the opposite direction. Although only two display formats for date and time are described, this is not restricted to them. For example, the year-month-day display can be replaced by a month-day-year display. The hour-minute-second display can also be replaced by a day-hour-minute display. These four display formats can also optionally be activated.

A square symbol is shown in FIG. 3, which indicates whether the magnetic storage disk 37 is inserted into the camera 5 . This symbol lights up when the magnetic storage plate 37 is inserted into the camera and the charging switch 42 is closed.

The change state for the mode type is changed cyclically by pressing the mode switch 18 in a manner to be described.

When the magnetic disk 37 is inserted and the on switch 16 is closed, the LCD display 15 is activated without flashing, as shown in FIG. 3. When the selector switch 19 is pressed for the first time, the change state is selected for the shooting type, and the symbol for self-timer operation flashes, as shown in FIG. 6B. If the selector switch 19 is pressed again, the flashing display of the type of recording changes in the order described above.

If the mode switch 18 is pressed while the display of the recording type or during the initial state is flashing, the display changes from flashing to continuous lighting. At the same time, the operating mode type is switched to the change state for recording / playback. This causes the recording / playback display section (ie, normal recording) to blink, as shown in Fig. 7A.

Pressing the mode switch 18 in this state ended the blinking of the display and causes the continuous glow. At the same time, the operating mode type of the camera 5 changes to the setting of the white balance. The white balance display section then starts to flash, as shown in Fig. 11A.

If the operating mode switch 18 is pressed again, the flashing indicator changes to a continuously illuminated display and the operating mode type of the camera is switched to the time / date change state. This causes the date display to flash in the corresponding display section, as shown in Fig. 12A. If the mode switch 18 is pressed again, the time display will blink, as shown in FIG. 13B.

If the operating mode switch 18 is pressed again, the flashing display changes to a continuously illuminated display. At the same time, the operating mode type of the camera changes to the setting mode for the recording mode. This causes the corresponding display section for the shooting mode to flash. Each time the operating mode switch 18 is actuated, the type of operating mode type setting changes cyclically.

If the release button 20 (test switch SWP) is actuated, this operating state is released and all display sections light up to indicate the settings entered.

After the mode type setting is completed through a full cycle, the date display is changed to show the time. Repeated operations of the mode switch 18 change the display on the time / date display section from time display to date display. Thus, the date display and the time display in this display section can be easily switched from one display type to another simply by pressing the mode switch 18 . In this embodiment, the time / date display is controlled by an automatic time / date switch which is part of the system control circuit 33 .

The basic operation of the single-image video camera 5 is described below.

When the magnetic disk 37 is inserted into the camera, the charge detection switch 42 is closed, and this condition is detected by the system control circuit 33 . If the switch 16 is closed, the spindle motor 38 starts the rotation of the magnetic disk 37 at a predetermined speed. Accordingly, the magnetic head 36 accesses the first (outermost) track in order to determine any information that may be present. The test step is carried out by scanning the surface of the magnetic disk 37 with the magnetic head 36 . Any signals detected with this are fed to the system control circuit 33 which determines whether the magnetic head 36 has read evaluable image or sound signals from the scanned track.

The magnetic head 36 is positioned on this track if it contains no information. It is switched to the next track if the first track contains information. The next track is then checked in the same way as the first track. As a result of the test, the magnetic head 36 is positioned on the first track, which contains valid audio or video information. Thus, the position initialization of the magnetic head 36 is completed and the track number on which the magnetic head 36 is positioned is shown on the corresponding display section of the LCD display 15 .

If the trigger button 20 is pressed halfway, the control switch SWP is switched on. This activates the light measuring circuit 47 , the focus detection circuit 51 and the color temperature detection circuit 37 , so that the light measurement calculation, the distance calculation and the white balance calculation can be performed with the system control circuit 33 . Depending on the result of the above-mentioned calculations, the diaphragm 31 is opened to a predetermined value with the diaphragm driver circuit 45 , and the focus lens group of the zoom lens 30 is brought into the focus position with the focus driver circuit 44 , so that a White balance setting value for the recording circuit 34 for image signals. If the measured light value is less than a predetermined value, ie if the object to be photographed is dark, the flash control circuit 53 is activated in order to start charging a flash capacitor.

If the release button 20 is pressed completely to close the release switch SWR, then an integral start / stop signal processing of the image sensor 32 takes place , so that it outputs video signals. These video signals are processed in the recording circuit 34 and in the image recording-reproduction circuit 35 into a predetermined frequency-modulated signal, which is then recorded on a track of the magnetic disk 37 with the magnetic head 36 .

When the recording process is finished, the magnetic head 36 is positioned to the next track, and the display of the track number in the corresponding display section of the LCD 15 is increased by 1 (if field processing is applied; otherwise, the track number is increased by 2).

The procedure described above is the Normal operation. With the single-frame video camera after Invention it is also possible to use the date and / or the Time on a data sector of the track as part of the data record signals of the recorded image.

If the camera is in playback mode, the AV socket is electrically connected to a monitoring device, for example a television set. Accordingly, a detection switch 56 is closed, which is determined by the system control circuit 33 , so that the playback mode is selected. At the same time, the record / playback display section of the LCD display 15 starts flashing with the word PLAY, as shown in Fig. 8A.

If the release button 20 is pressed in the playback mode, the signals recorded on a given track are read with the magnetic head 36 and output to the recording / playback circuit 35 , which determines whether the signals are video signals or audio signals.

If the signals are sound signals, they are given to the sound reproducing circuit 54 and the copy / monitor switch 25 . The sound signal obtained from the magnetic disk 37 is temporarily stored in a memory of the sound reproducing circuit 54 , subjected to an expansion in time, and then output from the memory to the changeover switch 25 .

If the read signals are image signals, a demodulated, separated brightness signal Y + S, a color difference signal LSC and a composite output signal are output to the changeover switch 25 . These signals are then output via this changeover switch 25 to the AV output socket 26 via a signal path which is described below.

When the copy / monitor switch 25 is switched to the copy side, sound signals are output from the sound reproducing circuit 54 to the AV output socket 26 , while image signals (ie brightness signal Y + S and color difference signal LSC) are output to the AV output socket 26 . When the switch 25 is in the monitoring position, audio signals are output from the recording / playback circuit 35 to the AV output socket 26 , while image signals (ie a composite video signal) are output to the AV output socket 26 . In this way, the signals can be mixed and the result is free from distortion and noise since demodulated and non-composite video signals are used.

If the switch 56 detecting the connection is not closed, ie the AV output socket 26 is not connected to an external device, there is no switchover to playback, even if the mode switch 18 is actuated. This saves the battery.

The operation of the system control circuit 33 is explained below in so far as it relates to the change in the mode of operation and the change in the corresponding displays. The flowcharts of FIGS . 14A to 20 serve this purpose . Before a detailed description, however, the main function of the system control circuit 33 is summarized.

The system control circuit 33 includes a CPU which operates in accordance with a program stored in a ROM to implement the mode change function according to the invention.

When the power switch 16 is closed, an mode set bit, an interrupt enable bit and certain other states are initialized. The memory associated with the display of the number of tracks is initialized when the charging switch 42 is opened, ie when the magnetic disk 37 is removed from the camera 5 .

After the initialization steps have been carried out, the position initialization of the magnetic head 36 and the information display on the LCD display 15 are carried out. After the position initialization of the magnetic head 36 , the interval timer starts, and the states of the switches 18 and 20 to 23 are input at predetermined intervals.

If one of the switches 18 , 20 to 23 is closed, a subroutine assigned to the switch is executed. For example, when the zoom switch 23 is closed, a subroutine for lens adjustment is performed, and the zoom lens group 30 is moved under the control of the zoom motor driver circuit 43 to achieve the desired focus. If the release button 20 (control switch SWP) is pressed while the camera is in the recording mode, a subroutine is carried out in accordance with the type of recording, and the processing of exposure factors such as focusing, light measurement calculation, aperture setting, integration and white balance and the signal processing for image recording the magnetic disk 37 are controlled ge. If the mode switch 18 is in the ON state, a subroutine for the mode setting is executed and the mode setting is controlled.

When the on switch 16 is closed and initialized before certain conditions, the mode number M for identifying the mode type is set to zero. The mode number M is increased each time the mode switch 18 is operated , and its value changes cyclically in the range from 0 to 4. It should be noted that a subroutine for changing the recording mode is called when the mode number M = 0. A subroutine for changing the white balance is called when the mode number is M = 2. A subroutine for changing the time / date is called when the mode number M = 3 or 4.

N is a dial number that corresponds to certain operating mode numbers, for example N (0), N (1), N (2), N (3) and N (4). The selection value of each number N is increased up to 4 each time the selector switch 19 is closed. Then it is reset to zero. The selection values are therefore changed cyclically. The data displayed on the assigned sections of the LCD display 15 are determined by the values of the dialing number N.

When the up / down switch 17 is operated, the magnetic head 37 is gradually brought to the outermost or to the innermost track. Closing the selector switch 19 causes a change in the type of recording. A description of the access operation of the magnetic head 37 is unnecessary to understand the invention. Such a description is therefore omitted.

The operation of the system control circuit will be explained below with reference to FIGS . 14A and 14B. When the mode switch 18 or the selector switch 19 is turned ON, the camera switches from a ready state to a subroutine for mode change. This selects an operating mode or the ready state for changing the operating mode.

In a step 100, it is determined whether the AV output socket 26 is connected (ie whether the detection switch 56 is closed). If this is the case, the subroutine goes to step 102 in order to switch the recording / playback mode to normal playback and to activate the word parts NORMAL PLAY on the corresponding display section of the LCD display 15 . Control then goes to step 103 to set the mode number M to 1. In this way, when the AV output socket 26 is connected, the mode number M is automatically set to 1, which corresponds to the readiness for setting the mode of operation recording / playback, as will be explained. Control then goes to step 104.

If the switch 56 is opened, the control goes to step 101 to set the recording / playback mode to normal recording and to activate the word parts NORMAL REC on the corresponding display section of the LCD display 15 , after which the subroutine closes Step 104.

In step 104, it is checked whether the mode switch 18 is in the ON state. If so, the subroutine goes to step 107 while going to step 105 with switch 18 open. The subroutine thus goes to step 107 with the mode switch 18 actuated.

If the mode switch 18 is not actuated, it is checked in step 105 whether the switch 16 is in the ON state. If it is in the OFF state, the subroutine goes to the END process. If the power switch 16 is ON, the subroutine proceeds to step 106. The END process is a process that exits the subroutine. The ready state is restored. If the mode switch 18 is brought to the ON state, this subroutine is carried out again.

If step 104 shows that the mode switch 18 is in the ON state, it is checked in step 107 whether the ON switch 16 is in the ON state. If so, the subroutine proceeds to step 110 to increment mode number M by 1 before proceeding to step 111. By increasing the mode number M by 1, the mode type is brought to the ready state for cyclical change as long as the mode switch 18 remains in the ON state. If the power switch 16 is in the OFF position, the subroutine goes to step 108.

In step 108 it is checked whether the mode number M is less than 3. If this is the case, it goes Subroutine to step 109 to set the mode number to 3 to be set before proceeding to step 111. Is the operating mode number is not less than 3, so the Control to step 111 without the mode number M to to change.

When this subroutine is started and the power switch 16 is OFF, steps 107 through 109 cause mode number M to be set to 3, thereby initiating the time / date change subroutine, which will be described.

In step 111 it is checked whether the mode number M is equal to 3. If this is the case, the subroutine goes in the process END. This changes the display on the on display section of the LCD display from time to date. Is mode number M is not equal to 3, so step 112 to check whether the mode number M is 4.

If so, control transfers to step 113. to check whether a flag A is set. Is the Mode number M is not equal to 4, so the Subroutine continues at step 116.

If it is determined in step 113 that flag A is not set, it is set in step 114, after which the subroutine proceeds to the END process. If it is determined in step 113 that the flag A is set, it is reset in step 115, after which the subroutine proceeds to the END process. The flag A changes the display in the time / date display section of the LCD display 15 between the date and time.

Correspondingly, flag A is activated by the processes of Steps 113 to 115 are inverted, and the display types according to dialing numbers N (3) and N (4) (Date display and time display) are interchanged.

In step 116, dial number N (3) is zeroed puts. Thereafter, the dial number becomes N (4) in step 117 set to zero before going to step 118. It should be noted that the dialing numbers N (3) and N (4) den Represent time / date change state and that zero represents a state in which no time / date Change of state occurs.

In step 118 it is checked whether the mode number M is greater than or equal to 5. If so, the subroutine goes to step 119 where the mode number M is set to zero. The subroutine then goes to the END process. If the operating mode number M is less than 5, the subroutine goes directly to the process END. The operating mode number M can optionally be set to 0 to 4 in this exemplary embodiment. Therefore, the mode number M is set to zero in steps 118 and 119 if it is 5 or larger. Accordingly, the mode switch 18 is operated five times, whereby the count of the mode number M is brought from 4 to 0 ge (four operations when the AV output socket 26 is connected).

If the selector switch 19 is found to be ON in step 106, the subroutine goes to step 120 where the dial number N (M) is incremented by 1. The operating mode number M is increased by 1 and the dial number N is set to a value that corresponds to the operating mode number M. Then the subroutine goes to step 121.

In step 121 it is checked whether the mode number M is zero. If this is the case, step 122 performed to set the subroutine Type of admission. After that, the subroutine brought into the process END. If the operating mode number M is not zero, the subroutine closes Step 123.

In step 123 it is checked whether the mode number M is 1. If this is the case, then in step 124 the subroutine for setting the open recording / playback operation performed. Then the Subroutine in the END process. Is the mode number M is not 1, the subroutine goes to step 125.

In step 125 it is checked whether the mode number M is equal to 2. If this is the case, then in step 126 the subroutine for changing the operating mode of the white carried out adjustment. Then the subroutine closes the process END. If the operating mode number M is not the same 2, the subroutine goes to step 127.

In step 127 it is checked whether the mode number M is 3 or 4. If this is the case, then step 128 the subroutine for setting the mode type Time / date executed. Then the subroutine closes the process END. If the operating mode number M is not the same 3 or 4, the subroutine goes to step 129.

In step 129, the mode number M becomes zero reset and then the process END executed.

After the process END is triggered switch SWR brought to the ON state. So that will this state of the operating mode setting is released.  

In the following, the mode change processes in the various states as described above will be explained with reference to FIGS. 15 to 18. When these processes are started, the ready conditions for changing the operating mode type recording type, changing recording / playback, changing the white balance and changing the time / date are set.

The operating mode number M is 0 when the selector switch 19 is switched on for the first time or the operating mode switch 18 is actuated five times and the selector switch 19 is actuated once with the ON switch 16 closed. This is determined in step 121, after which step 122 is proceeded from, from which the subroutine for changing the recording mode shown in FIG. 15 is executed.

In this subroutine, it is checked in step 130 whether the dialing number N (0) is 1. If so, step 131 is executed to execute the self-timer operation setting subroutine. Step 131 performs this process and changes the display in the corresponding display portion of the LCD 15 to that shown in Fig. 6B. The subroutine then goes to the END process. If the dial number N (0) is not 1, the subroutine goes to step 132.

In step 132 it is checked whether the dialing number N (0) is equal to 2. If this is the case, step 133 is carried out in order to execute the subroutine for serial image 1 frame / sec. This is done in step 133, with the corresponding display section of the LCD display 15 being switched to the display according to FIG. 6C. The subroutine then goes to the END process. If the dial number N (0) is not 2, the subroutine goes to step 134.

In step 134 it is checked whether the dialing number N (0) is 3. If this is the case, step 135 is carried out in order to execute the subroutine series image 2 frames / sec. Step 135 performs this mode and changes the display on the LCD section in the corresponding section to that shown in Fig. 6D. The subroutine then goes to the END process. If the dialing number N (0) is not equal to 3, the subroutine goes to step 136.

In step 136 it is checked whether the dialing number N (0) is 4. If this is the case, step 134 is carried out in order to execute the subroutine series image 5 frames / sec. Step 137 executes this subroutine and changes the display in the corresponding portion of the LCD 15 to that shown in Fig. 6E. The subroutine then goes to the END process. If the dial number N (0) is not 4, the subroutine goes to step 138.

In step 138, the dialing number N (0) is set and then proceeding to step 139. After the selector switch 19 is operated five times, the dial number N (0) is set from 4 to 0 in step 138.

In step 139, a switch is made to single-image operation and the LCD display 15 is brought to the display shown in FIG. 6A. Then control goes to the END process.

Thus, when the selector switch 19 is operated with the switch 16 closed, the processes of steps 100, 104, 105, 106, 120 and 122 are repeated each time the switch is operated or for as long as the selector switch 19 remains operated, and the shooting mode changes cyclically from frame to frame Self-timer mode, 1 picture / sec continuous shot, 2 pictures / sec continuous shot, 5 pictures / sec continuous shot and back to single picture.

The above description relates to the subroutine of setting the shooting mode, which is caused when the selector switch 19 is operated or the mode switch 18 is operated five times and the selector switch 19 is operated once and the AV output socket 26 is not connected after the on switch 16 is closed has been.

In the following, the method will be described with reference to FIG. 16, which takes place when the mode switch 18 is actuated once after the switch 16 is closed. A single actuation of the mode switch 18 changes the mode number M from 0 to 1. Therefore, control goes from step 123 to step 124, from which the subroutine of the mode setting recording / playback is entered.

In this subroutine it is checked in step 140 whether the detection switch 56 for the state of the output socket 26 is closed. So it should be determined who the whether the monitoring or copying is switched ge, in which the AV output socket 26 is electrically connected. If the switch 56 is closed, the subroutine goes to step 146, while if the switch 56 is open, the process goes to step 141.

In step 141 it is checked whether the dial number N (1) is 1, ie whether the selector switch 19 has been closed once. If the answer is positive, the subroutine goes to step 142. If the answer is negative, the subroutine goes to step 143.

In step 142, the setting of the AV recording is carried out and the display in the corresponding display section of the LCD display 15 is brought to that shown in FIG. 7B before the END process is entered.

In step 143 it is checked whether the dial number N (1) is 2, that is to say whether the selector switch 19 has been actuated twice. If the answer is positive, the subroutine goes to step 144, while if the answer is negative, it goes to step 145.

In step 144, the erase operation is set and the display in the corresponding section of the LCD display 15 is brought to that shown in Fig. 7C. The control then goes to the END process.

In step 145, the setting for normal recording is carried out and the display in the corresponding section of the liquid crystal display 15 is brought to that shown in FIG. 7A before going to step 153 in which the dialing number N (1) is set to 0. Then the process END is performed. Step 120 increases the dial number (N) from the initial value 0 by 1 each time the selector 19 is operated. When the dial number (N) reaches 3, it is set to 0 in step 153 so that the dial number N is in the range is changed from 0 to 2.

So if the AV output socket 26 is not electrically connected, the operating mode is set to each of the normal recording types, the AV recording and the delete operation, and each of these three operating modes can be selected by actuating the selector switch 19 .

As described, the process jumps from step 140 to step 146 if the AV output socket 26 is electrically connected. In step 146 it is checked whether the dialing number N (1) is 1, ie whether the selector switch 19 has been operated once. If the answer is positive, the subroutine goes to step 147, while if the answer is negative, it goes to step 148.

In step 147, the setting for erase operation is carried out and the display in the corresponding display section of the LCD display 15 is brought to that shown in FIG. 8B before the process is carried out to END.

In step 148 it is checked whether the dialing number N (1) is equal to 2, that is to say whether the selector switch 19 has been actuated twice. If the answer is affirmative, the subroutine goes to step 149. If the answer is negative, the subroutine goes to step 150.

In step 149, the normal recording or monitoring is set and the display in the corresponding display section of the LCD display 15 is brought to that shown in FIG. 8C. Then the END process is entered.

In step 150 it is checked whether the dial number N (1) is 3, ie whether the selector switch 19 has been operated three times. If this is the case, step 151 is carried out. If it has not been operated three times, the subroutine goes to step 152.

In step 151, AV recording / monitoring is switched to and the display in the recording / playback section of the LCD display 15 is brought to that shown in FIG. 8D. Then the END process is entered.

In step 152, playback is switched and the display in the recording / playback section of the LCD display 15 is brought to that shown in FIG. 8A. Then the dial number N (1) is brought to 0 in step 143 and the process END is carried out.

In step 120, the dialing number N is increased by 1 from an initial value of 0 each time the selector switch 19 is actuated. If the dialing number N reaches the value 4, it is reset to 0 in step 153. Dial number N thus changes in the range from 0 to 3.

If the AV output socket 26 is not electrically connected, the subroutine for changing the recording / playback mode changes this operation at predetermined intervals each time the selector switch 19 is actuated or as long as the selector switch 19 remains in the ON state, in the following order: Normal recording, AV recording, delete operation, back to normal recording.

If the AV output socket 26 is electrically connected, the subroutine for changing the recording / playback operation changes this operating mode at predetermined intervals in the following order: delete operation, normal recording / monitoring, AV recording / monitoring, playback, back for extinguishing operations. With the single-image video camera according to the invention, the recording mode is automatically switched to recording when the AV output socket 26 is connected. Similarly, when the AV output jack 26 is electrically disconnected, the playback mode is automatically switched back to the recording mode. This makes handling the camera much easier.

Furthermore, the switchover to the recording mode can also be achieved by actuating the mode switch 18 when the AV output socket 26 is electrically connected, so that the recording can be carried out in accordance with a desired image composition by monitoring the process in the recording mode. In the case of a single-image video camera without the possibility of monitoring, it is possible to dispense with the recording / monitoring switch 25 and thereby further reduce the size of the camera, the handling being simplified.

If the AV output socket 26 is not electrically connected, it is not possible to switch the camera into the playback mode by actuating the mode switch 18 . However, the described exemplary embodiment uses the detection switch 56 to determine whether the AV output socket 26 is electrically connected. Other detection means, for example an optocoupler, can also be provided. It is also possible to evaluate the impedance of an external device that is connected.

In the following, the process will be described with reference to FIG. 17, which takes place when the mode switch 18 is pressed twice after the on switch 16 has been closed.

The mode number M changes to 2 when the mode switch 18 is operated twice. Thus, control goes from step 125 ( FIG. 14B) to step 126, from which the change mode subroutine for white balance is executed.

In this subroutine, it is checked in step 160 whether the dial number N (2) is 1, that is, whether the dial switch 19 has been actuated only once. If so, the subroutine goes to step 161, while if the answer is negative, the subroutine goes to step 162.

In step 161, the white balance is switched to a first manual level (cloudy weather) and the display in the corresponding display section of the LCD display 15 is brought to that shown in FIG. 11B before the process is carried out to END.

In step 162, it is checked whether the dialing number N (2) is 2, that is, whether the dial 19 has been operated twice. If so, the subroutine goes to step 163. Otherwise, the subroutine goes to step 164.

In step 163, the white balance is brought to a second level (fair weather) and the corresponding display on the LCD display 15 is switched to the one shown in FIG. 11C before the process is ended.

In step 164 it is checked whether the dialing number N (2) is 3, that is to say whether the dial 19 has been operated three times. If so, the subroutine goes to step 165. Otherwise, it goes to step 166.

In step 165, the white balance is brought to a third level (fluorescent light) and the corresponding display section of the LCD display 15 is switched to the display shown in FIG. 11D before proceeding to the END process.

In step 166 it is checked whether the dial number N (2) is 4, ie whether the selector switch 19 has been actuated four times. If the answer is positive, step 167 is carried out, whereas if the answer is negative, step 168 is carried out.

In step 167, the white balance is switched to a fourth level (incandescent light) and the corresponding display portion of the LCD 15 is brought to the display shown in Fig. 11E before proceeding to the END process.

In step 168, the dialing number N (2) is set to 0, for which the counter is reset. Step 120 increments the dial number N from the initial value 0 by 1 each time the selector switch 19 is closed. If the dialing number N reaches the value 5, it is reset to 0 in step 168. It therefore changes its value in the range from 0 to 4.

In step 169, the white balance is switched to automatic white balance and the display in the corresponding section of the LCD display 15 is brought to that shown in FIG. 11A before the process is carried out to END.

The subroutine for changing the white balance changes this cyclically each time the selector switch 19 is operated in the following order: automatic white balance, cloudy weather, good weather, fluorescent light, incandescent light, automatic white balance.

The process of changing the time / date is initiated when the mode switch 18 is operated three or four times after closing the switch 16 . This subroutine will be described below with reference to FIG. 18.

Operating the mode switch 18 three or four times changes the mode number M to 3 or 4. Therefore, step 127 ( FIG. 14B) proceeds to step 128, from which the subroutine for changing the time / date is entered.

In this subroutine, it is checked in step 170 whether the dialing number N (3) or N (4) is 1, ie whether the selection switch 19 has been actuated once. If the answer is affirmative, the subroutine goes to step 171. Otherwise, it goes to step 174.

In step 171 it is checked whether flag A is set is. If it is not set, the subroutine closes Step 172, while to step with the flag set 173 is gone.

In step 172, the "hour" state is changed and the corresponding display on the LCD display 15 is brought to that shown in FIG. 13B. The subroutine then goes to the END process.

In step 173, the "YEAR" state is changed and the corresponding display portion of the LCD 15 is brought to the display shown in Fig. 12B before the subroutine goes to the END process.

In step 174 it is checked whether the dialing number N (3) or N (4) is 2, ie whether the selection switch 19 has been operated twice. If so, the subroutine goes to step 175. Otherwise, it goes to step 178.

In step 175 it is checked whether flag A is set. If it is not set, this indicates that the minute change should be displayed (step 176). This changes the display in the time / date section of the LCD 15 to that shown in Fig. 13C. If flag A is set, the change in the month is displayed in step 177. This changes the time / date display section of the LCD 15 to the state shown in Fig. 12C. After executing step 176 or 177, the process ends with END.

In step 178 it is checked whether the dialing number N (3) or N (4) is 3, ie whether the selection switch 19 has been operated three times. If the answer is positive, the subroutine goes to step 179. If the answer is negative, it goes to step 182.

In step 179 it is checked whether flag A is set. If this is not the case, the subroutine goes to step 180 to carry out the setting of the second change. This brings the time / date display section of the LCD 15 to the state shown in Fig. 13D. If flag A is set, the subroutine goes to step 181 to make the day change. Thereby, the display of the time / date portion of the LCD 15 is brought to the state shown in Fig. 12D.

In step 182, dial numbers N (3) and N (4) are set to 0 and then go to step 183. Dial number N is increased by 1 each time selector switch 19 is actuated. If the dialing number N reaches the value 4, it is reset to 0 in step 182. Dial number N thus changes in the range from 0 to 3.

In step 183, the change state time / date is released, the blinking of the display section time / date of the LCD display 15 is interrupted, and the data set with the mode setting are displayed. Then the process is ended. The change state time / date is thus released after the selector switch 19 has been actuated four times.

The subroutine for changing the time / date cyclically changes the flashing display (data change) each time the selector switch 19 is actuated in the order: year-month-day (set) -year when the flag A is set (ie date display). Similarly, the flashing display (data change) is cyclically changed every time the selector switch 19 is operated in the order of hour-minute-second (set) hour when the flag A is reset (ie time display). The flashing data display is increased or decreased each time the up / down switch 17 is pressed while the time / date display section is flashing.

In the subroutines for The flashing display is shown in the operating mode setting sets and the display of flashing to continuous Lights switched when the trigger switch SWR is closed after executing the END process.  

The recording mode can be changed by simply pressing the selector switch 19 . The other operating mode types (recording / playback, white balance and time / date) can be selected by operating the operating mode switch 18 , and the operating mode or the respective value can be changed by operating the selection switch 19 . In addition, the operating mode is automatically z. B. switched to the playback mode, the monitoring mode, etc. when the AV output socket 26 is electrically connected.

In the following, it will be described with reference to FIG. 19 how the system control circuit 33 operates when the AV output socket 26 is electrically connected.

When the magnetic disk 37 is inserted into the camera, the charge detection switch 42 is closed. If the AV output socket 26 is connected, the detection switch 56 is closed. If the switch 16 is also closed, the switch SWP ter is closed when the trigger button 20 is pressed. This executes the control subroutine (PLAY).

In this subroutine, it is checked in step 191 whether the recording mode is switched on. Is if not, the subroutine goes to step 192. Otherwise, the subroutine goes to step 197.

In step 192 it is checked whether the playback operation is switched on. If the answer is negative, it goes Subroutine to step 193. If it is positive, it goes to step 203.  

In step 193 it is checked whether the monitoring operation is switched on. If the answer is negative, it goes Subroutine in the process END, while at positi ver answer to step 194.

In step 194 it is checked whether the monitoring start flag is set. If this is the case, this indicates that the monitoring process is already being carried out. Thus, the subroutine goes to the END process. However, if the flag is not set, the subroutine goes to step 195 to set the monitoring start flag and start the monitoring process (step 196). Then the process ends. The term "monitor" denotes an operating mode in which the video signals which are emitted by the image sensor 32 (and the sound signals emitted by a separate recording device) are emitted to the AV output socket 26 .

As already described, the subroutine goes from Step 191 to step 197 if the shooting operation is switched on. After step 197, step 198 a color temperature detection and adjustment of the white carried out comparison. Then in step 199 the Distance measurement and focus adjustment leads. Then the subroutine goes to step 200.

In step 200, it is determined whether the flash unit in the Is ready state. If the flash is blocked, so the subroutine goes to step 201 to charge the To interrupt the flash unit. Is the flash unit in the Ready state, the subroutine goes to step 202 to start charging the flash unit. If step 201 or step 202 is carried out, the goes Subroutine for the END process.  

When the END process in the shooting mode is reached, the exposure / recording (photographic) process is carried out by fully pressing the release button 20 to close the release switch SWR.

If the camera is in playback mode, it goes Subroutine from step 192 to step 193 where checked whether the playback start flag is set. Meets if this is the case, the subroutine goes to step 204 to determine the Reset playback start flag. Then the Subroutine to step 205, where a silent signal is delivered to a ready state signal.

After this signal is output, the mode number M is set to 1 (step 206). This activates the word part PLAY on the LCD display 15 , as shown in FIG. 9A. The END process is then carried out.

If it is determined in step 203 that the playback start flag is not set, the subroutine sets this flag and executes the playback start process (steps 207 and 208). The magnetic head 36 accesses a predetermined track of the rotating magnetic storage disk 37 to read information therefrom. The signals obtained are output to the AV output socket 26 . Then the mode number M is set to 0 (step 209), causing the word portion PLAY to light on the LCD 15 as shown in Fig. 9B before proceeding to the END process.

In a single-frame video camera of the type described, the ready state is established when the playback mode is selected, but the release button 20 is not pressed. This avoids unnecessary electricity consumption. In addition, the silent signals are output in the ready state, so that on a viewing device (ie a monitor) there are no image impressions due to the generation of white noise signals if, for example, the playback track is traversed during the ready state.

Furthermore, the release button 20 (control switch SWP) also serves as a switch for starting and stopping the playback when the camera is in playback mode. A separate switch is therefore superfluous only for this purpose. In addition, playback is started and stopped each time the trigger button 20 is pressed. Therefore, a separate stop switch is not required, so that the camera can be smaller and requires fewer controls. Although starting and stopping playback is described here with control by the switch SWP (which is operated by pressing the trigger button 20 by one step), it is also possible to control the starting and stopping of the playback by the trigger switch SWR which is switched on is Untitled betae in the second step pressing the shutter button 20th The state of the playback is visually signaled by flashing the word part PLAY on the corresponding display section of the LCD display 15 when the ready state is present or by continuously lighting up PLAY when the playback is switched. Therefore, the user is constantly informed about the status of the camera.

In the following, the subroutine for changing the exposure compensation value will be described with reference to FIG. 20.

When the exposure compensation switch 22 is closed, this subroutine is entered. In step 210 it is checked whether the recording mode is currently switched. If the answer is affirmative, the subroutine proceeds to step 211, and if the answer is negative, it proceeds to the END process.

In step 211, a flag for the Exposure compensation (EF) set. This will turn on shown that exposure compensation is performed becomes. This ensures that the exposure value at Time of exposure is compensated.

It is then checked in step 212 whether the change the exposure compensation value flag is set, d. H. whether the exposure compensation value differs from the reference value +1.5 EV. Is the If the answer is positive, the subroutine jumps to step 214.

If the answer in step 212 is negative, then it goes Subroutine to step 213 to complete the Set exposure compensation value to +1.5 EV. Then the process proceeds to step 214.

In step 214 it is checked whether the up switch 17 a is closed. If it is closed, a corresponding flag is set in step 215 before proceeding to step 218.

If the result of the check is negative in step 214, the subroutine proceeds to step 216 to Che fen whether the down switch is closed b 217th If it is open, the subroutine goes into the process END. However, if the test result is positive, the subroutine goes to step 217 to set a corresponding flag before proceeding to step 218.

In step 218 it is checked whether the flag indicating that the change in the exposure compensation value is switched on is set. If it is not set, the process END is carried out. If it is set, the subroutine goes to step 219 to set the flag indicating the change in exposure compensation value. When this flag is set, the symbol ± EF is activated on the LCD display 15 , as shown in FIGS. 5C to 5E.

Then, in step 220, the subroutine checks whether the flag indicating the closing of the up switch 17 A is set or the flag indicating the closing of the down switch 17 b is set. If it is determined that the flag indicating the closing of the up switch is set, the subroutine goes to step 221. If it is determined that the flag indicating the closing of the up switch 17 a is not set, the subroutine goes to step 224.

In step 221, the exposure compensation value is changed to a step 0.5 EV decreased and to step 222 passed over to check whether the Exposure compensation value is less than -2.0 EV. If so, the subroutine goes to step 223, to set the exposure compensation value to -2.0 EV zen before proceeding to step 227. So is the minimum EV value of the exposure compensation value set at -2.0 in this embodiment. Is the exposure compensation value is not less than -2.0 EV, the subroutine goes to step 227.  

If the test result in step 220 that the up switch 17 is closed a, then skips the subroutine of step 220 to step 224, whereby the exposure compensation value is increased by +0.5 EV, before proceeding to step 225, it is checked whether the exposure compensation value is +2.0 EV or greater. If the answer is affirmative, the exposure compensation value is set to +2.0 EV in step 226 and then the procedure is passed to step 227. If the answer is negative, step 226 is skipped. Thus, the maximum EV value for the exposure compensation value is set at +2.0 EV in this embodiment.

In step 227, it is checked whether the exposure compensation value is +1.5 EV (ie the reference value). If so, the subroutine proceeds to step 228 where the exposure compensation value change flag is reset before the END process is performed. If the exposure compensation value is not equal to +1.5 EV, the subroutine jumps directly to the END process and skips step 228. In this way, the ± EV display on the LCD 15 for changing the exposure compensation value is not activated if the exposure compensation value is equal to the reference value. On the other hand, if there is a difference from the reference value, the symbol ± EV is activated on the LCD display 15 .

This subroutine is repeated at predetermined intervals as long as the exposure compensation switch 22 remains closed.

In the above-described embodiment, the operation for changing the exposure compensation value is simplified because the exposure compensation value is changed only by operating the up / down switch 17 while the exposure compensation switch 22 is depressed. In addition, the total number of switches on the camera is reduced because the up / down switch 17 also serves as an exposure compensation changing device. Furthermore, the display symbol ± EV on the corresponding display section of the LCD display 15 is activated after the exposure compensation value has been changed from the reference value +1.5 EV, even if the exposure compensation switch 22 is not pressed, so that the user knows beforehand that that the exposure compensation value is changed from the reference value.

Although in this embodiment the reference value Expected for exposure compensation with +1.5 EV is how he often uses backlit shots is used and the exposure compensation value in Increments of 0.5 EV increased in the range of ± 2.5 EV the invention is not based on these values limits.

With an adjusting device of the type described above, the type of recording that is switched most can be changed in its initial state only by actuating the selector switch 19 , for example after the on switch 16 is switched on, after actuating the trigger button 20 , after disconnecting the circuit from the AV output jack 26 or before performing other operations. Such a property is advantageous for simplifying the change in operating mode, the handling of the camera is considerably improved and any incorrect operating mode change is avoided. When the operating mode change is carried out, the current operating mode is set by pressing the trigger button 20 , the operation of a separate element being superfluous, which should only be present for this purpose. Such a property enables the construction of a compact and inexpensive camera.

The invention leads to a camera in which the mode change is achieved with a single actuating element (selector switch 19 ) for the most changed mode (recording mode), or in which the mode change is achieved by actuating a combination of various controls (up / down switch 17 , mode switch 18 and selector switch 19 ) to change the less frequently used mode types.

In the exemplary embodiment described here, the date display and the time display in the corresponding display section of the LCD display 15 are changed alternately and cyclically by actuating the operating mode switch 18 . The data setting for each display can be accomplished by operating the up / down switch 17 which is primarily used to control the positioning of the magnetic head 36 . Accordingly, the number of operation switches required is reduced, which contributes to the construction of a cheaper and compact camera that is easy to handle.

The arrangement of the date and time on the LCD display 15 together with the various display sections for the operating mode such. B. Type of recording is very cheap because the time and date together with the different modes of operation can be recognized at a glance. The invention has been described above using an electronic single-frame video camera. However, it can also be applied in the same way to conventional cameras that work with photographic films.

Claims (9)

1. Single-frame video camera with an arrangement ( 35 , 36 , 37 , 38 , 39 , 40 , 41 ) for recording video signals, an arrangement ( 35 , 36 , 37 , 38 , 39 , 40 , 41 , 54 ) for reproducing recorded video signals, an output arrangement ( 26 ) for outputting video signals and an operating mode changing device for setting an operating mode from a multiplicity of operating modes of different operating mode types including a playback operating mode type, wherein a change state of an operating mode type can optionally be set, and wherein the operating mode changing device is a selection arrangement ( 33 , 19 ) with actuating element ( 19 ) for selecting one of several operating modes of the operating mode type, the change state of which is set, characterized in that the change state of the playback operating mode type can be set by connecting the output arrangement ( 26 ) to an external device which recorded video signals in egg ner playback mode can be output via the output arrangement ( 26 ). 2. Single-frame video camera according to claim 1, characterized in that when the playback mode is set, the playback of the recorded video signals is started or stopped by actuating a trigger ( 20 ). 3. Single-frame video camera according to claim 1 or 2, marked by a detection switch ( 56 ) for automatically switching the single-frame video camera to the output section ( 26 ) when it is connected to the external device. 4. Single-image video camera according to one of the preceding claims, characterized in that the selection arrangement ( 33 , 19 ) has a single actuating element ( 19 ). 5. Single-image video camera according to claim 4, characterized in that in a basic state of the operating mode changing device, the change state of the recording mode is set and one of several different recording modes can be selected by actuating the single actuating element ( 19 ). 6. Single-frame video camera according to claim 5, characterized in that the basic state is set immediately after the closing of a supply voltage switch ( 16 ). 7. Single-image video camera according to claim 5 or 6, characterized in that the basic state after the actuation gene of the trigger ( 20 ) is set. 8. Single-frame video camera according to one of the preceding claims, characterized in that an operating mode delete can be set independently of the wiring of the output arrangement ( 26 ). 9. Single-frame video camera according to one of the preceding claims, characterized by an arrangement ( 35 ) for outputting the video signals to be recorded via the display device ( 35 , 36 , 37 , 38 , 39 , 40 , 41 , 54 ) when a recording mode is set and the output device ( 26 ) is connected.