JPS6156589A - Image monitor unit of detachable type electron camera - Google Patents

Abstract

PURPOSE:To simplify the mechanism of image pickup unit and recording/ reproducing unit, by incorporation encoder circuit for generating composite color image signals in the image-monitor unit and by displaying the image on CRT, liquid crystal display, etc. based on the output from the encoder circuit. CONSTITUTION:An electron camera of unit-detachable type is designed to select a combination from those of image pickup unit 100 and/or recording/reproducing unit 200 and/or image-monitor unit 300. The combination of image pickup unit 100 and image-monitor unit 300 is designed to be connected electrically by connecting connector CNLA incorporated in the image pickup unit 100 with a connector CN1B incorporated in the image-monitor unit 300. The output terminal from an NYSC encoder circuit 33 in the image-monitor unit 300 is connected to the output terminal 40 from the NTSC image signal encoder circuit and to the input terminal to an NTSC display 35 comprising electron view finder such as CRT, liquid crystal display, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a video monitor unit in a four-detachable unit type electronic camera, and more particularly to a video monitor unit that is detachably connected to an electronic camera body comprising an imaging unit and a recording/reproducing unit.

(Prior Art) In place of conventional cameras that record subject images using silver halide film, electronic cameras that convert subject images into electrical signals using imaging means such as COD and record these electrical signals on magnetic disks have recently been developed. , appeared.

This electronic camera not only allows recording of still images and reproduction of recorded still images in real time without the need for conventional silver halide film development processing, etc.
Moving images can also be recorded by using a recording device such as a video recorder. In such an electronic camera that can be used in a variety of ways, it is desirable to use only the necessary parts depending on the intended use, from the standpoint of miniaturization, weight reduction, and operability. In order to meet such demands, the applicant has
A removable unit type electrophotographic apparatus as described in Japanese Patent No. 8-182964 was proposed. This separates an electronic camera into an electrophotographic device main body and a unit that is detachably attached to this main body, electrically connects the two, and provides images from the main body into the unit. The apparatus includes a recording and reproducing means for recording and reproducing information.

According to this, since the electronic camera is made into a unit, it is possible to reduce the size and weight depending on the intended use. However, there were five drawbacks: the function and operability of the video monitor section were still insufficient and lacked specificity.

(Objective) The object of the present invention is to configure an electronic camera divided into three removable units: image pickup, recording/playback, and video monitor.
An electronic camera with recording and playback functions.

It can be used with the minimum necessary combination of units in each of the four usage modes: "playback-only device,""videocamera," and "recording-only electronic camera."
It is now possible to receive recorded signals (luminance signals and color difference signals) from an electronic camera as they are, or receive the output from a magnetic reproducing head, and display them on a video display device such as a CRT or liquid crystal display based on the received signals. An object of the present invention is to provide a video monitor unit for a detachable unit type electronic camera.

(Summary) The video monitor unit in the removable unit electronic camera according to the present invention is configured to output a decoder circuit that generates a luminance signal and a color difference signal from a reproduction signal from a magnetic disk, or generates a luminance signal and a color difference signal from a B&image unit. After receiving the output, based on the received signal, ``1: Predetermined method, for example, N
An encoder circuit for generating a composite power 2-video signal of the TSC system is provided in the unit, and an image is displayed on a display such as a CRT or liquid crystal based on the output of the encoder circuit.

(Embodiments) Hereinafter, embodiments of the present invention will be described using FIGS. 1 to 3. As shown in FIG. 100, a recording and reproducing unit 200, and a video monitor unit 300.
- Imaging unit 100 and video monitor unit 300
The electrical connection is made between the connector CN2 provided on the imaging unit 100 and the video monitor unit 30.
This is done by connecting to the connector CN1n provided at 0. Further, the imaging unit 10
0 and the recording and reproducing unit 200 are connected by two connectors CN thrown to the imaging unit 100 and a connector CN thrown between the recording and reproducing unit 200.
This is done by connecting to 2B. Further, electrical connection between the video monitor unit 300 and the recording/reproducing unit 20a is achieved by connecting two connectors CN provided on the video monitor unit 300 and a connector CN5B provided on the recording/reproducing unit 200. It's a trap to be rented out again. The above units 100, 200, and 300 can be mechanically and selectively connected by a connecting mechanism (not shown).

The imaging unit 100 is provided with a photographing lens 1 for forming a subject image, and an iris 2 and a shutter 3 are interposed in the optical path of the photographing lens 1. and,
On the imaging surface of the photographic lens 1, an imaging means for two-dimensionally converting an optical image into an electrical signal, such as a CCD 4, is arranged,
The CCD 4 is two-dimensionally scanned by the horizontal scanning signal H from the synchronizing signal generating circuit 5 and the vertical scanning signals v1 and K. The output end of the CCD 4 is connected to the input end of a signal processing circuit 7 via a preamplifier circuit 6. The signal processing circuit 7 receives the output signal from the CCD 4 and the synchronization signal S from the synchronization signal generation circuit 5, and generates an R degree signal Y and a color difference signal (R-Y) 1-color difference signal (B Y).
The output terminal of the circuit that produces I, rfiJ, M7 and Yft is connected to the two terminals of connector CN, (R-Y)
The signal output end is connected to the terminal CVc of the same connector CN2, and the signal output end is connected to the terminal d of the same connector CN2A. Further, the terminals S, C, and D are commonly connected to the terminals D, E, and F of one connector CN, respectively.

A Ninit selection signal generation circuit 8 is also provided in the unit 100, and the output terminal of this circuit 8 is
It is connected to terminal a of connector CN IA and terminal g of connector CN2A. The circuit 8 is connected to the imaging unit 10
When a predetermined power is supplied to 0, the high level (hereinafter referred to as
It outputs a signal of high level (referred to as H level). Furthermore, a mode switching circuit 9 is provided within the unit 100, and the output terminal of this circuit 969 is connected to the terminal C of the connector CNIA.
and; connected to terminal a of connector CN2A. The circuit 9 changes its output according to the recording mode and playback mode set by a manual switch (not shown), that is, when the record mode is set, the output signal is at H level, and the playback mode is set. This is a circuit that changes to a low level (hereinafter referred to as L level) output when the output is off. Furthermore, the output end for sending out the horizontal synchronization signal H2 from the synchronization signal generation circuit 5 is connected to the terminal e of the two connectors CN, and the output end for sending out the vertical synchronization signal v2 is connected to the terminal f of the two connectors CN. , the output end for sending out the subcarrier signal SC1 is connected to the terminal bK of the connector CN1.

Next, the configuration of the recording/reproducing unit 200 will be explained.

; The terminal of the connector CN 2B is connected to the input terminal of the luminance signal modulation circuit 11, and the terminal C is connected to the (RY
) r signal input terminal, and the terminal d is connected to the (B
Y) Connected to the i signal input terminal. The output end of the circuit 12 is connected to one input end of the adder circuit 14 via the chroma signal quality eight channel 13, and the output end of the luminance signal modulation circuit 11 is connected to the other input end of the circuit 14. has been done.

The output end of the adder circuit 14 is connected to the normally-off end 16a of the switch circuit 16 via the recording amplifier circuit 15.
The normally-on end 1 (5b) of the circuit 160 is connected to the preamplifier circuit 17 via the preamplifier circuit 18. Supported.

The magnetic disk 19 is attached to the motor 21 by a chucking portion formed at the center of the disk 19.
A pulse generator yoke (hereinafter abbreviated as PG yoke) 20 is formed in the chucking portion. A detection coil 22 for detecting the position of the PG jaw 0 is provided near the chucking part, and this detection coil 22 is connected to one control input terminal of the motor drive control circuit 23. . A control output terminal of the circuit 23 is connected to the motor 21. A synchronizing signal generating circuit 24 is also provided in this unit 200, and an output terminal from which the vertical synchronizing signal v3 is sent is connected to the normally-on terminal 25b of the switch circuit 25.
The off end 25a is connected to the terminal f of the connector CN 2B, and the common end 25c is connected to the other control input end VC of the motor drive control circuit 23. Furthermore, the subcarrier signal output end of the synchronization signal generation circuit 24 is connected to the connector CN 3n.
is connected to terminal a of. And connector CN 2
The terminal g of B is connected to the control input mK of the switch circuit 25, and the terminal e is connected to the synchronization signal input terminal of the line sequentialization circuit 12. Furthermore, the terminal a is connected to the control input terminal of the switch circuit 16.

Next, the configuration of the video monitor unit 300 will be explained. Connector CN1! Terminals d, e, and f of l are connected to respective normally-off ends 30a, 31a, and 32a of switch circuits 50, 31.32,
Each switch circuit! The respective common terminals 30c, 31c, and 32c of +0.31, 32 are the Y signal input terminal of the NTSC encoder circuit 33, and the R-Y@ large input terminal B.
- Connected to the Y signal input terminal. The subcarrier signal input terminal of the circuit 63 is connected to the common terminal 34C of the switch circuit 34, and is connected to the terminal of the normally-off terminal 54a C:I connector CN1m,
4b is connected to terminal a of connector CNs, and the same circuit 3
40 control end is connected to terminal a of connector CNIB. The output terminal of the NTSC work/coder circuit 33 is
(connected to 8C video signal output terminal 40)C, CR
NTSC consisting of an electronic viewfinder such as T or liquid crystal
It is connected to the display 650 input terminal.

The terminal of the connector CNs^ is connected to the input terminal of the color separation circuit wr56, and the output terminal of the luminance signal component of the circuit 36 is connected to the input terminal of the color separation circuit wr56.
The Y2 signal is connected to the normally-on terminal 30b of the switch circuit 30 via the signal demodulation circuit 37 as a Y2 signal. The output terminal of the chroma signal component of the color separation circuit 36 is connected to the input terminal of a synchronization circuit 39 via a chroma signal demodulation circuit 38. The circuit 39 is a well-known circuit that converts the line-sequentially inputted Y-Y signal and B-Y signal into simultaneous signals. The (RY)2 signal output terminal of the circuit 39 is connected to the switch circuit 310 no-i-reon terminal 31b, and the (B
-Y)2 signal output terminal is connected to the normally-on terminal 32b of the switch circuit 32. The above switch circuit! 0.
The respective control ends of 31 and 32 are commonly connected and connected to terminal C of connector CNIB.

The electronic camera according to the present invention is configured in this way.

Next, its operation will be explained.

In this example, 2 nits each) 100, 200, 50
0 can be used by connecting them in the following five combinations.

(1) Imaging unit 100 and video monitor unit 500
A mode in which the three components, ie, the recording and playback z=t 200, are connected to each other and used as an electronic camera capable of recording and playback.

(2) A mode in which the fi Ni unit 200 and the video monitor unit 300 are connected and used as a playback-only device.

(3-pin imaging unit 10 [1 and video monitor unit 30
0 and used as a video camera.

First, the operation in case (1) above will be explained using FIG. In this case, each of the terminals B-f of the connector CN1 and each of the terminal axf of the connector CN1B are electrically connected to each other, and similarly to the connector CN2A.

Terminals a to g of CN2Jl and connect pCN3A, CN5
Terminals a and b of B are electrically connected. Then, when power (not shown) is supplied to each part and the recording mode is set using a switch (not shown), the output of the mode switching circuit 9 goes to H level, and the connectors CN1^ and CN1Bf
), switch circuit through terminals c and c! 10,31.3
2 is activated, = connector CN2, terminal a of CN2JI,
The switch circuit 16 is activated via a.

Furthermore, as power is supplied to the imaging w unit 100, the output of the unit selection signal generation circuit 8 goes to H level, so the terminals a, a, of the connectors CN1m, CN1m
1 switch circuit 34 is activated via connector CN2
The switch circuit 25 is activated via the terminal g1g of the CN2B. Therefore, each switch circuit 16,25°30.3
1, 32, and 34, their common ends and normally-off ends are electrically connected, as shown by broken lines in FIG.

In this state, since the shutter 6 is open, a subject image is formed on the light-receiving surface of the CCD 4 through the photographing lens 1Fc. At this time, the amount of light incident on the CCD 4 is adjusted by the iris 2 by v4. The image formed on the CCD 4 is two-dimensionally scanned by the horizontal scanning signal H and vertical scanning signal vI from the synchronizing signal generation circuit 5, and the image formed on the CCD 4 is
An electrical signal corresponding to the subject image is generated at the output. After this signal is amplified to a predetermined level A- by a preamplifier circuit B, the signal processing circuit 7 generates a Y1 signal based on the synchronizing signal SK from the synchronizing signal generating circuit 5.

(RY) r signal - (B Y) s signal is created.

These 381 signals, namely the Y1 signal, the (几-η, signal, and the B-frost signal) are connected to the terminals d of the connectors CNIA and CNHI.

Video monitor unit 600 via d; e, e; f, f
sent to the side. And these three types of signals are NT
SC encoder circuit 33 and switch circuit 30°51.5
A predetermined NTSC color video signal is generated based on the subcarrier signal SC which is inputted through the synchronous signal generation circuit 5 and inputted through the connector CN1 and the terminals S and B of the CNIB and the switch circuit 34. It will be done. When the same signal is applied to the output terminal 40IC, it is input to the KNTSC display 35, and an image corresponding to the image formed on the CCD 4 is displayed on the same display gray 35. In this state, after adjusting the distance, focal length, composition, etc. of the photographing lens 1 while visually viewing the image on the display 35, when a release button (not shown) is operated, a 350 m image on the display is recorded. This recording is performed as follows.

After the shutter 3 is closed as the release button is operated, the CCD
Exposure to 4 is performed. At the same time as this exposure operation, CC
D4 is two-dimensionally scanned by the horizontal scanning signal H1 and vertical scanning signal 1ri from the synchronization signal generation circuit 5, and the CCD 4
The output signal is amplified by the preamplifier circuit 6 and input to the signal processing circuit 7. Then, the Y1 signal and (RY)1 signal - (BY)s signal are generated at the output end of the circuit 7, and these signals are sent to the recording/reproducing unit 200;

The signals are sent out through terminals S, b; c, c; d, and d of ON 211, respectively. The luminance signal Y is then FM-modulated by a luminance signal modulation circuit. Also (RY)
The line sequentialization circuit 12 generates (RY) + signal and (B Y) signals based on the horizontal synchronization signal H2 from the synchronization signal generation circuit 5. The chroma signal is converted into a line-sequential chroma signal.The chroma signal is subjected to low frequency conversion, FM modulation, and near-7 assist by the chroma signal modulation circuit 13.Then, the adder circuit 14 converts the chroma signal to the luminance signal modulation circuit. 11 and the output signal of the chroma signal modulation circuit 13 are mixed and input to the recording angle circuit 15. The same circuit 15t
Accordingly, processing such as recording equalization and white beak clipping is performed, and the recording/reproducing magnetic head 18 is applied with the recording/reproducing magnetic head 18 via the switch circuit 16.

At this time, the vertical synchronization signal M' from the synchronization signal generation circuit 5
i2t! s * / / CN 2A, CN 2
! Since the voltage is applied to the other control input terminal of the motor drive control circuit 23 through the switch circuit 25, the PG yoke 20 rotates as the motor 2 and is detected by the detection coil 22. The magnetic disk 19 is rotationally driven while its relative position with the recording/reproducing magnetic head 18 is phase-controlled by the signal. Therefore,
Magnetic recording is performed using the PG yoke position as a reference position.

On the other hand, when reproducing a signal recorded on the magnetic disk 19, it is possible to do so by switching a switch (not shown).
The output of the mode switching circuit 9 changes from H level to L level. Then, the switch circuits 16゜50.31.32 change from the operating state to the non-operating state, and each switch circuit 16,
30, 31, and 32 are in a state in which the common terminal and the normally-on terminal are electrically connected at 5, as shown by solid lines.

At this time, when the rotation of the magnetic disk 19 is controlled in the same manner as before, the reproduction signal obtained by the recording/reproducing magnetic head 18 is amplified to a predetermined level by the preamplifier circuit 17 via the switch circuit 16, and processing such as reproduction equalization and de-emphasis is performed. is performed, and a reproduced signal PB is obtained. This reproduced signal FB is sent to the video monitor unit 300 side via the connector CN5B and the terminals S and B of CNs. Then, the reproduced signal FB is transmitted to Y by the color separation circuit 36.
Separated into signal component and chroma signal component. Y at this time
The signal component is FM demodulated by the luminance signal demodulation circuit 37 and subjected to a predetermined de-emphasis to obtain the Y2 signal, which is input to the NT8C encoder circuit 33 via the switch tgJ path 30. Further, the chroma signal component is FM demodulated by the chroma signal demodulation circuit 38 and subjected to a predetermined de-emphasis, and the (几-Y)2 signal and (B-Y)2 signal are synchronized by the synchronization circuit 39. The generated same (R-Y) 2 signal is sent to the NTSC encoder circuit 33 via the switch circuit 31, and the same (B-Y) 2 signal is sent to the NTSC encoder circuit 33 via the switch circuit 32.
) are input as CR-Y signal and BY signal. Then, the same circuit 33 sends out the synchronization signal from the synchronization signal generation circuit 5 to the connector CN1.

Based on the subcarrier signal SC input via terminals S and B of CN1m and the switch circuit 34, the specified NTSC
A color video signal is produced 9, the signal is applied to the output terminal 40 and input to the NTSC display 35, and a reproduced image corresponding to the signal recorded on the magnetic disk 19 is displayed on the display 35.

Next, in the case of (2) above, that is, the recording and reproducing unit, )20
The operation when the video monitor unit 300 is connected to the video monitor unit 300 and used as a playback-only device will be described with reference to FIG.

In this case, since the imaging unit 100 (see FIG. 1) is not connected, the I-level output of the unit selection signal generation circuit 8 is not applied to the terminal a of the connector CN1E and the terminal g of the connector CN2B, so the switch circuit 25
．． 34 are both inactive and both 1 inactive circuits 25.34
The common end and the normally-on end are electrically connected at 5 as shown by the solid line. Also, the output of the mode switching circuit 9 is connected to the connector CNI.
Since no voltage is applied to terminal C of B and terminal a of connector CN2B, switch circuits 16, 50° 51.52 are both inactive, and each switch circuit 1 (5, 30° 31.32 is connected to the common terminal as shown by the solid line) The normally on end is conductive.

Therefore, unlike the case in step (1) above, the rotation of the motor 21 is controlled in the same way as before based on the vertical synchronization signal V from the synchronization signal generation circuit 24 provided in the recording/reproducing unit 200K. Then, the signal recorded on the magnetic disk 19 is Y2 in the same manner as in the reproduction operation in the case (1).
The (RY)2 signal, the (B-Y) signal, and the (B-Y) signal are input to the NTSC encoder circuit 33 via the switch circuits 30, 31, and 32.

At this time, the Taepu cow Yaria priest number S inputted to the same @N33
Unlike the previous case (1), C connects the subcarrier signal SC2 from the synchronizing signal generation circuit 24 provided in the recording/reproducing w=t 200 to the connector CN5B, the terminals a and a of the three CNs, and the switch circuit. 34. Then, based on the subcarrier signal SC2, the required NT8
A C color video signal is produced by the circuit 33,
The signal is applied to the output terminal 40 and also input to the NTSC display 35, so that a reproduced image corresponding to the signal recorded on the magnetic disk 19FC is obtained.

Next, the operation in case (3) above, that is, when the imaging unit 100 and the video monitor unit 300 are combined and used as a video camera, will be explained using FIG.

In this case, the switch circuit 34 is activated by the H level output of the unit selection signal generating circuit 8, and the common terminal 54G and the normally-off terminal 34a are electrically connected as shown by the broken line. Further, when the recording mode is set by a switch or the like (not shown), the output of the mode switching circuit 9 becomes H level, and the switching circuits 50, 51, 52
Both become active. Therefore, each switch circuit 30
, 31, 32, the normally-off terminals and the common terminals are electrically connected.

Therefore, an image corresponding to the subject image is displayed on the NT8C display 35 in the same way as in the recording mode in the case of (υ) above.At this time, an NTSC color video signal is sent from the output terminal 40, so this signal is not shown in the figure. If you connect it to the video input terminal of a video tape recorder that does not have a camera, you can record images of rare spiders.

In this way, according to this embodiment, each unit is 100°200°
. Since the signal is amplified by 5 and sent to the video monitor unit 300 side, there is an advantage that the SIN ratio can be improved. Also, Imaging Units) 100. Synchronizing signal generating circuits 5 and 24 are provided in both the recording and reproducing units 200, and when the base image unit 100 is coupled, various synchronizing signals from the synchronizing signal generating circuit 5 provided in the imaging unit 100 are recorded. It is designed to be sent to the playback unit 200 and the video monitor unit 300, and
, =t 100 are not coupled, various synchronization signals from the synchronization signal generation circuit 24 provided in the w = unit 00 are sent to the video monitor 2 unit 300. It is possible to obtain a video signal that is not affected by jitter caused by eccentricity of the disk 19 or the like.

In each of the above combination examples, the NTSC encoder circuit 330 built into the video monitor unit 300 is replaced by a PA, L voice or ICAM encoder circuit, or a similar system similar to the NTSC encoder circuit 330. Of course, you can change it to . Further, the position of the shutter 3 may be in front of the imaging surface such as the C0D4, and it goes without saying that instead of using the shutter 3, the imaging means such as the IICCCD4 may be electrically controlled.

Further, in the above embodiment, the imaging unit 1o.

The main body of the electronic camera is composed of the and recording/reproducing unit 200, and it goes without saying that the main body is an integrated imaging/recording/reproducing unit (Kl, m), which is not divided into two parts, but in this case. In this case, as shown in FIG. 4, the connectors CN2 and CN2B shown in FIGS. 1 to 3 are removed, the input and output terminals of each circuit are directly connected, and the unit selection signal generating circuit 8. Synchronous signal generation circuit 24. Switch circuit 25. The switch circuit 34 is removed, and the tape carrier signal SC1 from the synchronization signal generation circuit 5 is connected to the connector CN.
The horizontal synchronization signal H2 of the circuit 5 is connected to the synchronization signal input terminal of the line sequentialization circuit 12, and the vertical synchronization signal of the circuit 5 is v2 may be connected to the input terminal of the motor drive control circuit 230.

Furthermore, it goes without saying that the units in each of the above embodiments may be connected via an intermediate extension cable instead of being directly connected using a connector.

(Effects of the Invention) According to the present invention, the method of using an electronic camera,
In other words, it is possible to selectively combine only the minimum necessary components depending on whether it is used as an "electronic camera with recording/playback function,""playback-onlydevice," or "video camera." It is very convenient, and since the function and operability of the video monitor section are specifically improved, the drawbacks of this type of conventional system can be eliminated and the expandability of the system can be greatly expanded.

Further, according to the present invention, since the video monitor unit 300 can receive the brightness signal and color difference signal during recording or the brightness signal and color difference signal during playback as they are and display the video, the configuration of the imaging unit and the recording/playback unit is This has the remarkable effect of simplifying the process.

[Brief explanation of drawings]

FIG. 1 is an electrical circuit diagram of a video monitor unit in a detachable unit type electronic camera showing an embodiment of the present invention. Figure 2 shows a combination of a recording and reproducing unit and a video monitor unit in the electronic camera shown in FIG. 1 above. Figure 3 is an electric circuit diagram of a video camera that combines the image pickup unit and video monitor unit in the electronic camera shown in Figure 1 above, and Figure 4 is an electric circuit diagram of a video camera shown in Figure 1 above. FIG. 2 is an electric circuit diagram in which an imaging unit and a recording/reproducing unit in the detachable unit type electronic camera shown in FIG. 1 are integrated.

Claims (1)

[Claims] A video monitor unit detachably connected to an electronic camera body comprising an imaging unit and a recording/playback unit, which receives a playback output signal of an image signal recorded on a magnetic disk and outputs the playback output signal. a decoder circuit that generates a luminance signal and a color difference signal from the signal; and a decoder circuit that receives the reproduced luminance signal and the reproduced color difference signal from the deeder circuit, or receives the luminance signal and the color difference signal from the imaging unit of the electronic camera body, and receives the reproduced luminance signal and the reproduced color difference signal. A video monitor unit in a detachable unit type electronic camera, comprising: an encoder circuit that generates a composite color video signal based on a signal output from the encoder circuit; and a display that displays video based on the output signal of the encoder circuit.