JPH0614225A - Camera incorporated type magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To reduce the pollution of a signal due to a voltage drop, and to stabilize the operation of a circuit by making the ground wiring length of an image pickup element unit the shortest by directly bringing the ground potential parts of both a power source part and the image pickup element unit arranged on a VTR circuit board into contact with each other. CONSTITUTION:A VTR mechanism part 60 is arranged at a left side, and a VTR board 30 is arranged at a right side so that the insertion port of a VTR cassette can be arranged at the left side in order to hold a video camera in a right hand. Therefore, a camera PC board 20 which frequently operates the transmission and reception of a signal with the board 30 is arranged at the right side of the camera, and an AF board 40 is arranged at the left side. It is necessary to arrange a power source 50 to be close to a CCD 11 whose signal level is the lowest, and to shorten the ground wiring between both of them. There is no space to mount the power source 50 at the board 10 on which the CCD 11 is mounted, and then the power source 50 is mounted on the board 30, and the shield case is brought into contact with the shield case of the CCD 11 on the board 10. And also, at least one of those shield cases is provided with elasticity, or equipped with a plate spring or the like. And also, an AV connector is provided on the board 30 so that a video signal from an outside can be received.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera-integrated magnetic recording / reproducing apparatus, and more particularly to a video camera and a VTR-integrated video camera having a wiring board and a component arrangement suitable for downsizing.

[0002]

2. Description of the Related Art FIG. 6 is an external view of an example of a conventional VTR integrated video camera. The user holds the main body 1 with his right hand and operates the video camera while monitoring the subject with the viewfinder 3. 4 is a lens unit (objective lens), 5
Is a microphone, and 6 is a battery pack. As is well known, the VTR integrated video camera has a small size,
Technologies such as lightweight and low power consumption are being sought after.
For this reason, for example, miniaturization and weight reduction of the VTR mechanism section, IC / LSI circuit construction, and plastic integration of the lens section have been repeatedly studied.

[0003]

In the above VTR-integrated video camera, since the density of circuit parts, wiring, etc. increases with miniaturization, workability in assembly, inspection, maintenance, etc. is significantly deteriorated. There is a problem that characteristics are likely to be deteriorated due to coupling between circuits. Also, since many types of operation buttons are arranged in a narrow space for the user, the operability is not necessarily improved by the reduction in size and weight, but the operability is not necessarily improved.
There was also a problem such as a cable or the like joined to V, VTR, etc. being an obstacle. It is an object of the present invention to provide a camera-integrated magnetic recording / reproducing apparatus such as a video camera or a VTR-integrated video camera which solves the above problems.

[0004]

In order to solve the above-mentioned problems, a camera-integrated magnetic unit including at least a lens portion, a camera signal processing portion on which an image pickup device unit is mounted, a VTR circuit board, a VTR mechanism portion and the like. In the recording / reproducing device,
The ground potential section of the power supply unit arranged on the VTR circuit board and the ground potential section of the image pickup device unit of the camera signal processing section are brought into direct contact with each other. Further, the ground potential portion of the power supply unit and / or the ground potential portion of the image pickup device unit is used as a shield case. Further, an AV connector for transmitting / receiving a video / audio signal to / from an external device is provided at the end of the VTR circuit board on the lens side.

[0005]

By directly contacting the ground potential section of the power supply unit and the ground potential section of the image pickup device unit of the camera signal processing section, the ground wiring length between the two is minimized to reduce signal contamination due to the voltage drop. Stabilize the operation of the circuit.
Further, by forming each of the ground potential parts as a respective shield case, the ground potential parts are automatically brought into contact with each other during assembly. Also, by mounting the power supply unit on the VTR board 30, the wiring length from the power supply unit to each circuit unit is shortened. Further, the AV connector cable is connected to the lens side surface of the VTR-integrated video camera by disposing the AV connector at the end of the VTR circuit board on the lens side.

[0006]

1 is a circuit block diagram of an embodiment of a video camera integrated with a VTR according to the present invention. An image input from the lens unit 4 is converted into an image signal by a CCD (image pickup device) 11 in a camera SP (camera signal processor) substrate 10. In addition, T. G and V. The drivers are a timing signal generator and a vertical driver for scanning the CCD 11, respectively.

The video signal of the CCD 11 is CDS / AGC
Camera PC through (correlated double sample / automatic gain adjustment) circuit
(Camera signal processor) A / D converter in board 20
Digitally converted by a converter 21, processed variously by a DSP (digital signal processor) 22, and converted into an analog signal by a D / A converter 23 to obtain V.
It is sent to the TR board 30. In addition, the A / D converter 21
Is output from the AF DSP4 in the AF (autofocus) substrate 40.
1, the automatic focus process is performed, and the focus of the lens unit 4 is automatically adjusted via the microcomputer and the driver.

A microcomputer 24 is connected to the DSP 22 to supply data necessary for signal processing,
The signal from the angular velocity sensor 12 in the camera SP substrate 10 is received and the fluctuation of the image due to the camera shake is corrected.

FIG. 2 is a control block diagram of the camera shake correction. In camera shake correction, the microcomputer 24 receives the camera shake signal in the horizontal (H) and vertical (V) directions from the angular velocity sensor 12 and the focal length signal f from the DSP 41, calculates the camera shake amount, and executes the T.S. The G13 is controlled to correct the vertical scanning position of the CCD 11, and the zoom circuit 25 is controlled to correct the horizontal scanning position.

FIG. 3 is a control block diagram of AWB (automatic white balance) and AE (automatic exposure) correction performed by the DSP 22. In AWB control, environmental values such as outdoor, night indoor, and theater are derived from the depth, time, and illuminance (aperture, shutter speed, AGC signal, brightness signal, etc.), and the white balance control range is determined according to the environmental value. (R and B color temperature range) is limited. The depth amount is extracted from the focusing signal, the time is extracted from the clock circuit, and the illuminance is extracted from the luminance signal. Further, in the AE control, it is particularly important to keep the white peak value in the center of the image appropriately, so the signal amount at the center of the image is extracted while being compared with the signal amount at the peripheral, and The white peak value at is determined to control the aperture of the camera section and the AGC (automatic gain adjustment) gain. This AE control is particularly effective during a play.

In FIG. 1, the camera SP board 10, the camera PC board 20, the AF board 40, etc. operate lens portions,
The lens unit 4 is the part that processes the signal from the CCD 11.
It is desirable to assemble it together with. In addition, CCD11
The signal obtained from is very weak and easily contaminated by noise, so we want to make it as small as possible and shorten the wiring distance.
For this reason, it is desirable to advance the circuit integration to reduce the number of parts and to make one board, but since unreasonable integration causes a significant price increase, it is currently divided into three boards as shown in the figure. is doing.

FIG. 4 is an exploded perspective view of the system shown in FIG. Since the CCD 11 needs to be in close contact with the lens barrel of the lens unit 4 and the amount of camera shake needs to be detected by separating the vertical and horizontal components toward the front, the angle sensor 12 should face the lens direction. . Therefore, in the present invention, as shown in FIG. 1, the CCD 11 and the angle sensor 1 are
The camera SP board 10 on which 2 is mounted is arranged so as to face the lens direction and to be in close contact with the lens barrel.

Since the video camera is held by the right hand, it is necessary to arrange the VTR cassette insertion port on the left side.
Place the VTR mechanism unit 60 on the left side of the front and place the VT on the right side.
The R substrate 30 is arranged. As a result, the camera PC board 20 that frequently exchanges signals with the VTR board 30 is arranged on the right side of the camera as shown, and the AF board 40 is arranged on the left side.

The position of the power supply 50 is extremely important in the above-mentioned board arrangement. That is, all of the above-mentioned substrates are fed by the power source 50, but the current from each substrate concentrates on the ground line of the power source 50, causing a voltage drop in the ground wiring resistance. This voltage drop has a strong adverse effect on the weak signal circuit, polluting the signal and at the same time making the operation of the circuit unstable. In the system of FIG. 1, the camera SP substrate 10 corresponds to the weak signal circuit, and the signal level of the CCD 11 is the weakest among them.

Therefore, it is necessary to dispose the power source 50 close to the CCD 11 and shorten the length of the ground wiring between them. Therefore, the CCD 11 on the camera SP substrate 10
It suffices to mount the power supply 50 in the vicinity of the power supply 5. However, since the camera SP board 10 does not have an area allowance,
0 must be mounted on another board. Therefore, in the present invention, the power source 50 is mounted on the VTR board 30 as shown in FIG. 4, and the shield case is mounted on the CC board on the camera SP board 10.
Make sure to contact the shield case of D11. Further, in order to improve the reliability of the contact, at least one of the shield cases is provided with elasticity or a leaf spring or the like is provided.

In the connection between the shield cases, a wide contact area can be secured, so that the ground resistance value can be kept low, and further, the ground wiring between the CCD 11 and the power source 50 is not required. . In addition, the power source 50 is C
As a result of arranging them closer to the CD 11 side, the power source 50 comes to be located in the central portion of the VTR board 30, so that the power supply distance to each circuit block in the board can be minimized on average.

The VTR board 30 is the camera PC board 2
It receives the video signal from 0 and sends it to the VTR signal
It is converted into a matte video signal and at the same time various servo signals are generated and supplied to the VTR mechanism section 60. Also, VTR
In the integrated video camera, it is required to supply the video signal and the audio signal to an external monitor device such as a TV receiver and a stereo device, and to receive and record the video signal from the outside. AV connector is provided. Considering the case where a signal needs to be sent to the external monitor device during imaging, it is necessary to prevent the cable connected to the AV connector from interfering with the camera operation.

For this reason, in the present invention, the above-mentioned connector is shown in FIG.
It is arranged on the lens portion side of the VTR substrate 50 as shown by the arrow, and after assembly, the terminal surface of the AV connector is exposed from the opening of the external case. As a result,
The bull is connected to the front of the video camera so it does not interfere with camera operation. Further, in FIG. 4, the signal of the VTR board 50 is moved from the left side to the right side to move the VTR mechanism section 60.
After the video / servo signal is supplied to, the signal returns to the left side, so that there is no difficulty as the signal path, and the advantage that the component layout on the board becomes easy can be obtained.

FIG. 5 is an external view of a VTR integrated video camera in which the board and the components are arranged as described above. 61 is VT
It is the video cassette insertion slot of the R mechanism section 60,
The connector is provided behind the lens unit 4 and the microphone 5. Also, the viewfinder 3 is a VTR as shown.
Since it is provided close to the substrate 50 side, wiring between the two is facilitated.

[0020]

According to the present invention, the ground wiring length between the power supply unit and the image pickup device in the VTR integrated video camera can be minimized to reduce signal pollution due to the voltage drop and stabilize the circuit operation. . Further, by using each of the ground potential portions as a shield case, the number of ground potential wiring steps between the two can be omitted. Further, by mounting the power supply unit on the VTR board 10, the wiring length from the power supply unit to each circuit unit can be shortened. Further, the AV connector can be arranged on the front surface of the VTR-integrated video camera so that the cable connected to the AV connector does not interfere with the operation of the VTR-integrated video camera.

[Brief description of drawings]

FIG. 1 is a block diagram of a VTR integrated video camera according to the present invention.

FIG. 2 is a block diagram of an image stabilization unit of a VTR-integrated video camera according to the present invention.

FIG. 3 is a block diagram of a white balance and white peak correction unit of the VTR integrated video camera according to the present invention.

FIG. 4 is an exploded view of a VTR integrated video camera according to the present invention.

FIG. 5 is an external view of a VTR integrated video camera according to the present invention.

FIG. 6 is an external view of a conventional VTR integrated video camera.

[Explanation of symbols]

1 ... Main body, 3 ... Viewfinder, 4 ... Lens part, 5 ...
Microphone, 6 ... Battery pack, 10 ... Camera SP substrate, 11 ... CCD, 12 ... Angle sensor, 20 ... Camera P
C board, 21 ... A / D converter, 22 ... DSP (digital signal processor), 23 ... D / A converter
, 24 ... Microcomputer, 25 ... Zoom circuit, 30 ... VTR
Substrate / D, 40 ... AF substrate, 41 ... AF DSP, 50
... power supply, 60 ... VTR mechanism section.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masami Mizuno 1410 Inada, Katsuta City, Ibaraki Prefecture Hitachi Ltd. AV Equipment Division

Claims (3)

[Claims] 1. A camera-integrated magnetic recording / reproducing apparatus including at least a lens section, a camera signal processing circuit board on which an image pickup device unit is mounted, a VTR circuit board, a VTR mechanism section, and the like, which are arranged on the VTR circuit board. A magnetic recording / reproducing apparatus integrated with a camera, wherein the ground potential part of the power supply unit and the ground potential part of the image pickup device unit on the camera signal processing circuit board are directly contacted with each other. 2. The camera-integrated magnetic recording / reproducing apparatus according to claim 1, wherein the ground potential portion of the power supply unit and / or the ground potential portion of the image pickup element unit is a shield case. 3. The VTR according to claim 1 or 2,
A camera-integrated magnetic recording / reproducing device, wherein an AV connector for transmitting / receiving a video / audio signal to / from an external device is provided at an end of the circuit board on the lens portion side.