JPH02135406A - Video camera device - Google Patents

Abstract

PURPOSE:To control so as to satisfy a desired image pickup conditions by permitting the CPU of a camera device main body to transmit a control signal to the CPU of a lens device based on an optical characteristic data signal and a controlled condition signal both of which the CPU of the main body has received. CONSTITUTION:In the initial stage after the lens device 2 is loaded on the camera device main body 1, a data transmission requesting signal is transmitted from the CPU 3 of the main body 1 to the CPU 4 of the device 2. The CPU 4 transmits optical characteristic data to the CPU 3 according to whether the data transmission requesting signal is received or not. In the control stage after the initial stage, the CPU 3 transmits a control signal to the CPU 4 based on the optical characteristic data signal and the controlled condition signal both of which the CPU 3 has received. With respect to the CPU 4, the diaphragm 17 of an image pickup lens 16 and plural lenses 18 are driven by the drive of a driving means 19. This satisfies desired photographing conditions irrespective of the optical characteristic of the device 2 loaded onto the main body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video camera device comprising a camera device main body including an imaging means for obtaining a video signal, and a lens device attached to the camera device main body.

[Summary of the invention]

A first aspect of the present invention is a video camera device comprising a camera device main body provided with an imaging means for obtaining a video signal, and a lens device attached to the camera device main body, in which the camera device main body and the lens device communicate with each other. The microcomputer of the camera device body is equipped with means for transmitting a data transmission request signal and a control signal to the microcomputer of the lens device, and the microcomputer of the lens device is equipped with a means for transmitting a data transmission request signal and a control signal to the microcomputer of the camera device body. , a means for transmitting an optical characteristic data signal and a controlled state signal specific to the lens device, and in an initial stage after the lens device is attached to the camera device main body, the lens device is transmitted from the microcomputer of the camera device main body. transmitting a data transmission request signal to the microcomputer of the lens device, and in response to receiving the data transmission request signal, the microcomputer of the lens device transmits an optical characteristic data signal to the microcomputer of the camera device main body; In the control stage after the initial stage, the microcomputer of the camera device body sends a control signal to the microcomputer of the lens device based on the received optical characteristic data signal and controlled state signal. As a result, regardless of the optical characteristics of the lens device attached to the camera device main body, the camera device main body can accurately control the lens device attached to the camera device main body so as to satisfy desired imaging conditions. This is how it was done.

A second aspect of the present invention is that in the first aspect, the data request signal, the control signal, the optical characteristic data signal, and the controlled state signal are obtained from the imaging means in each microcomputer of the camera device main body and the lens device. By generating the signal in synchronization with the vertical synchronization signal used for the video signal, the camera device body can control the lens device attached to the camera device body in the desired manner, regardless of the type of lens device attached to the camera device body. In addition to being able to accurately control the image capturing conditions to satisfy them, it is also possible to obtain a video signal with the best image quality from the image capturing means in units of one or more fields, depending on the optical characteristics of the lens device. This is what I did.

A third aspect of the present invention is a video camera device comprising a camera device main body provided with an imaging means for obtaining a video signal, and a lens device attached to the camera device main body, in which the camera device main body and the lens device are mutually connected to each other. A microcomputer capable of communication is provided, and the microcomputer of the camera device main body is provided with means for transmitting a connection confirmation data transmission request signal to the microcomputer of the lens device,
The microcomputer of the lens device includes means for transmitting a connection confirmation signal to the microcomputer of the camera device main body in response to receiving the connection confirmation data transmission request signal. By comprising means for detecting whether or not a connection confirmation signal is received from the computer, it is possible to easily detect the electrical connection state between the camera device main body and the lens device attached thereto. be.

[Conventional technology]

In conventional optical still camera devices, multiple lens devices (interchangeable lenses) with different optical characteristics are prepared for the main body of the camera device, and a lens device arbitrarily selected from the multiple lens devices is inserted into the camera device. Devices that are attached to the main body and used are widely used.

On the other hand, even in a video camera device equipped with an imaging means for obtaining a video signal, a plurality of lens devices (interchangeable lenses) with different optical characteristics are prepared for the main body of the camera device, and a user can select one from among the plurality of lens devices. It is extremely convenient to use the lens device attached to the main body of the camera device.

Such a video camera device is described, for example, in Japanese Patent Application No. 63-422745, which was unknown at the time of filing of this application.

[Problem to be solved by the invention]

A video camera device captures a moving image using an imaging means such as a CCD, and converts the image into an electrical signal, that is, a video signal.

Such a video camera device is divided into a camera device main body and a lens device, and the lens device is selected from among a plurality of lens devices having different optical characteristics such as telephoto, wide-angle, and zoom lens devices having different focal lengths. If you select any one lens device and use it by attaching it to the camera device body, the camera device body can automatically control the lens device such as automatic focus control, automatic exposure control, automatic mill/black balance control, etc. If carried out, the mode of control varies depending on the optical characteristics of the lens device, ie, focal length, F-number, spectral characteristics, etc. Furthermore, the types of optical characteristics that can be controlled differ depending on the lens device.

In view of this, the first aspect of the present invention provides that the camera apparatus main body allows the lens apparatus attached to the camera apparatus main body to satisfy desired imaging conditions, regardless of the optical characteristics of the lens apparatus attached to the camera apparatus main body. The purpose of the present invention is to propose a video camera device that can be precisely controlled.

Further, the second aspect of the present invention is to accurately control the lens device attached to the camera device body so that the camera device body satisfies desired imaging conditions, regardless of the type of lens device attached to the camera device body. The present invention attempts to propose a video camera device that is capable of obtaining video signals of the best image quality from the imaging means in units of one or more fields, depending on the optical characteristics of the lens device.

A third aspect of the present invention is to propose a video camera that can easily detect the electrical connection state between a camera device main body and a lens device attached to the camera device main body.

[Means to solve the problem]

A first aspect of the present invention provides a camera device main body (1) comprising an imaging means (5) for obtaining a video signal;
In a video camera device comprising a camera device body (1) and a lens device (2) attached to the
2) is equipped with microcomputers (3) and (4) that can communicate with each other, and the microcomputer (3) of the camera device main body (1) is connected to the microcomputer (4) of the lens device (2). , a means for transmitting a data transmission request signal and a means for transmitting a control signal. means for transmitting an optical characteristic data signal and a means for transmitting a controlled state signal; The microcomputer (3) transmits a data transmission request signal to the microcombiator (4) of the lens device (2), and in response to receiving the data transmission request signal, the microcomputer (4) of the lens device (2) ) sends an optical characteristic data signal to the microcomputer (3) of the camera device main body (1), and in the control stage after the initial stage, the microcomputer (3) of the camera device main body (1) A control signal is transmitted to the microcomputer (4) of the lens device (2) based on the received optical characteristic data signal and controlled state signal.

A second aspect of the present invention is that in the first aspect, the data request signal, the control signal, the optical characteristic data signal, and the controlled state signal are transmitted to the camera device main body (1) and the lens device (2).
), each of the microcomputers (3) and (4) generates the signal in synchronization with the vertical synchronization signal used for the video signal obtained from the imaging means (5).

A third aspect of the present invention provides a camera device main body (1) comprising an imaging means (5) for obtaining a video signal;
In a video camera device comprising a camera device body (1) and a lens device (2) attached to the
2) is equipped with microcomputers (3) and (4) that can communicate with each other, and the camera device main body (1)
The microcomputer (3) of the lens device (2) is equipped with means for transmitting a connection confirmation data transmission request signal to the microcomputer (4) of the lens device (2), and the microcomputer (4) of the lens device (2) The microcomputer (3) of the camera apparatus main body (1) is equipped with means for transmitting a connection confirmation signal to the microcomputer (3) of the camera apparatus main body (1) in response to the reception of the data transmission request signal, and the microcomputer (3) of the camera apparatus main body (1) The apparatus includes means for detecting whether or not a connection confirmation signal is received from the microcomputer (4) of the device (2).

[Effect]

According to the first aspect of the present invention, in the initial stage after the lens device (2) is attached to the camera device main body (1), the microcomputer (3) of the camera device main body (1) For the microcomputer (4),
The microcomputer (4) of the lens device (2) transmits the data transmission request signal, and in response to the reception of the data transmission request signal, the microcomputer (4) of the lens device (2) instructs the microcomputer (3) of the camera device main body (1) to determine the optical characteristics. send a data signal,
In the control stage after the initial stage, the camera device body (1
) transmits a control signal to the microcomputer (4) of the lens device (2) based on the received optical characteristic data signal and controlled state signal, respectively.

According to the second aspect of the invention, in the initial stage after the lens device (2) is attached to the camera device main body (1), the microcomputer (3) of the camera device main body (1) For the microcomputer (4),
The microcomputer (4) of the lens device (2) transmits the data transmission request signal, and in response to the reception of the data transmission request signal, the microcomputer (4) of the lens device (2) instructs the microcomputer (3) of the camera device main body (1) to determine the optical characteristics. send a data signal,
In the control stage after the initial stage, the camera device body (1
)'s microcomputer (3) sends a control signal to the microcomputer (4) of the lens device (2) based on the received optical characteristic data signal and controlled state signal, and also sends a data request signal. and control signals, optical characteristic data signals, and controlled state signals are sent to the imaging means (5) in the microcomputers (3) and (4) of the camera device main body (1) and the lens device (2).
) is generated in synchronization with the vertical synchronization signal used for the video signal obtained from ).

According to the third aspect of the present invention, the microcomputer (3) of the camera device main body (1) transmits a connection confirmation data transmission request signal to the microcomputer (4) of the lens device (2), and The microcomputer (3) of the camera device main body (1) responds to the reception of the connection confirmation data transmission request signal.
A connection confirmation signal is sent to the camera device body (1).
The microcomputer (3) detects whether or not a connection confirmation signal is received from the microcomputer (4) of the lens device (2).

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

First, the overall configuration of the video camera device will be explained with reference to FIG. This camera device has a camera device main body (1
) and an exchangeable lens device (2). These camera device main body (1) and replaceable lens device (2) are each equipped with a separate microcomputer (3).
, (4), and these microcomputers (3).
) and (4) are configured to be able to communicate with each other.

Next, the configuration of the camera device main body (1) will be explained.

(5) is an image sensor, which is made of, for example, a COD. This imaging device (5) is an imaging lens (16) of a lens device (2).
The object image is formed on the imaging surface by receiving imaging light from the camera. The video signal from this image sensor (5) is amplified by an amplifier (6), and then supplied to a recording device (8) through a video signal processing circuit (7) and recorded. This recording device (8) can be a helical scan type VTR1 magnetic disk recording device, an optical recording device, etc., and also has a playback function.

Further, the video signal from the video signal processing circuit (7) is supplied to the optical information detection circuit (9). This optical information detection circuit (9) determines various aspects such as the in-focus state of the subject image projected by the imaging lens (16) onto the imaging surface of the imaging element (5) and its light intensity based on the video signal supplied thereto. Optical information is detected, and the detection signal is sent to a microcomputer (11
). To detect this in-focus state, for example, extract the high-frequency component from the video signal obtained from the image sensor (5), and detect the state where the level of the high-frequency component is maximum as the in-focus state. good. Further, the amount of light may be determined by detecting the level of the video signal.

A manual data selection switch (12) is connected to the microcomputer (11), and a data selection signal for switching the zoom state of the imaging lens (16) according to the switching state of the manual data selection switch (12) is sent to the microcomputer (11). )
It is designed to be supplied to

(10) is a power source such as a battery, and its positive and negative power terminals are
It is connected to a microcomputer (11), a recording device (8), and other circuits whose connection states are not shown.

In addition, a vertical synchronization signal Sv from a synchronization signal generation circuit (not shown) (a circuit that generates a vertical synchronization signal, a vertical synchronization signal, a color subcarrier signal, etc. based on an oscillation signal from a crystal oscillator) is input. It is supplied from the terminal (13) to the microcomputer (3), and based on this vertical synchronization signal Sv,
Various signals described below are generated by the microcomputer (3).

Note that the frequency of this vertical synchronization signal Sv is 60 Hz in the 525/60 television system and 50 Hz in the 625150 television system.

(14) is a viewfinder, which is equipped with a CRT (15), and a video signal from a video signal processing circuit (7) is supplied to the CRT (15).

Next, the configuration of the lens device (2) will be explained. (16) is an imaging lens, for example, a zoom lens, which is composed of a plurality of lenses (18), some of which are driven by driving means (19).
) to move it in the axial direction, thereby performing focus adjustment, zoom adjustment, etc. This imaging lens (16) also has an aperture (1
7) is provided, and its aperture diameter is also controlled by the driving means (19). The driving means (19) is composed of a plurality of motors, etc., and the driving means (19) is
Controlled by a microcomputer (4).

Further, optical data such as the focal length and aperture ratio of the imaging lens (16) are detected by a detection means (20) consisting of a plurality of detection elements, and the detection signal is sent to a memory (22) through a microcomputer (4). is supplied to and stored.

(21) is an automatic control device for automatic focus adjustment, etc., which receives a detection signal such as a focus state detection signal of the imaging lens (16) from the detection means (20), and based on this, drives the drive means (19). to adjust the focus of the imaging lens (16), etc., according to the user's selection.
) can be performed only on the side.

Next, the electrical connection between the camera device main body (1) and the lens device (2) will be explained. The camera device main body (1) and the lens device (2) are as shown in FIGS. 2 and 3, respectively.
Electrical connection is established through contact between six contacts (25) and (26), which are provided correspondingly to the contact surfaces (23) and (24) that are in contact with each other. These six sets of contacts (
25), (26) Through mutual electrical connection, the serial control signal CTL of the packet communication method, the chip select signal C8, and the system clock signal SCK are transmitted from the camera side microcomputer (3) to the lens side microcomputer (4). is transmitted, and a packet communication serial status signal LTC is transmitted from the microcomputer (4) on the lens side to the microcomputer (3) on the camera side. The positive and negative currents +■ and -■ are supplied to the microcomputer (4) of the lens device (2) and the circuits between the various parts whose connected states are omitted from illustration.

Next, see Figure 4 for the control signal CTL, status signal LTC signal, chip select signal C8, and system clock signal SCK transmitted between the camera side microcomputer (3) and the lens side microcomputer (4). and explain.

The chip select signal C8 is the fourth chip select signal as shown in FIG. 4B.
It is generated in synchronization with the vertical synchronization signal Sv shown in Figure A, has a constant phase with respect to the vertical synchronization signal 3v, rises and falls within one field period, and is at a high level during a predetermined period shorter than the L field period. , is a signal that reaches a low level in the periods before and after that (note that the chip select signal C8 may alternate between high and low levels depending on the signal format). FIG. 4C shows this chip select signal CS enlarged in the time direction.

Then, during the high level period of the chip select signal C8, the control signal CTL and the status signal LTC are transmitted one packet at a time in synchronization with the vertical synchronization signal Sv, as shown in FIGS. 4E and F. Bit signals b□, b1 of each word signal constituting the control signal CTL and status signal LTC
, . . . , b7 are formed so as to be synchronized with this system clock signal SCK.

Next, with reference to FIG. 5, the structure of each word signal of one packet of the control signal CTL and the status signal LTC will be explained. Control signal CTL and status signal LTC
As shown in FIG.
Consists of 0 bytes (between word signals RDO-WORD9
('7-
The F signal -0RDO, WORD9) is used as the header section. The remaining 8 bytes of the control signal CTL (word signal WO
RD2 to WORD9) are control objects (this will be called a unit) that the camera device main body (1) controls the lens device (2), and the control contents for each control object (this is each unit 7). ).

The remaining 8 bytes of status signal LTC (word signal W
ORD2 to WORD9) contain the optical characteristics and controlled states (these will also be referred to as units) of the lens device (2), the characteristic content for each optical property, and the state content for each controlled state ( This will also be called the expression of each unit 7).

These control signals CTL and status signals LT
As an expression for one unit in C, the lens device (2) is attached to the camera device main body (1), and immediately after that, various optical characteristic data of the lens device (2) is supplied to the camera device main body (1). During the initial period (this is referred to as the initial time), the camera device main body (1) uses 8 bytes to perform data processing based on various optical characteristic data and controlled state data received from the lens device (2). The period for controlling the lens device (2) (this is referred to as control time) is composed of 4 bytes. Therefore, in this case, data representing two units can be transmitted in one packet).

Next, the 2-byte header part of the control signal CTL and status signal LTC (word signal WORDO1woRD1
). In the word signal WORDO, as shown in FIG. 6, 2-bit bit signals b4 and b5 represent the packet length, and 2-bit bit signals b6 and b7 represent the data type. Note that the bit signal bits bO to b3 are undefined.

As shown in FIG. 7, the packet length is expressed in (4n+2) bytes, where n is the number of units, depending on the values of the 2-bit bit signals b4 and b5, and the number of units n=1 to 4.
There are four types of packet lengths 6.10.14 and 1, corresponding to
8 bytes can be selected. In this embodiment, the packet length is 10 as shown in FIG.
Fixed to part-time job.

As shown in FIG. 8, the data types are initialized, control data,
Can represent manufacturer-specific (option) distinctions (including undefined).

Further, the word signal -0RDI represents a check code using 4-bit bit signals bO to b3, as shown in FIG.
The bit pattern is made different depending on the control signal CTL and status signal LTC. Note that the remaining 4 bits of bit signals b4 to b7 are undefined. When the camera-side microcomputer (3) and the lens-side microcomputer (4) each receive a check code signal from the other side, after confirming that it has been correctly received, they send word signals WORD2, punishment RD3, . Analyze the data and find out that this check code signal is 0°5.
If no reception is received within seconds or more, the communication returns to the initial time and starts communication again.

Next, the contents of the unit expression section of the control signal CTL at the initial time will be explained. FIG. 10 shows the contents of the control signal CTL at the initial time. Note that X indicates an undefined portion. The unit expression part (word signals WORD2 to WORD9') of the control signal CTL at the initial time is the word signal WO.
Three initial commands, ie, a start command, lens specification supply, and unit specification request, are expressed by different bit patterns of RD3.

Next, the contents of the unit expression part of the status signal LTC at the time of initialization will be explained. FIG. 11 shows the contents of the status signal LTC in the case of an initial start command. In the case of an initial start command, the unit expression part of the status signal LTC (word signal WOR
D2 to -0RD9'), all bit signals of the word signal qWORD3 are "0".

Next, the definition of unit number will be explained. 1st
As shown in Figure 2, among the 8-bit bit signals constituting the word signal, 3-bit bit signals %bO, bl, b2 are used to calculate the unit numbers 〇, 1, . . .
, 7, where units O11 and O2 correspond to autofocus (AF), aperture (IR3), and zoom (ZOOM), respectively, and units 3 to 7 are undefined.

Although not shown in the figure, the valid/invalid flag (
When valid, it is "1", when invalid, it is "0"), and when invalid, it is the bit signal bo, bl, b2.

Regardless of its value, the unit number is meaningless.

FIG. 13 shows the contents of the status signal LTC in the case of the initial lens specification packet. Among the unit expression parts (word signals WORD2 to WORD9) of the status signal LTC in the case of the initial lens specification packet, the word signal WORD3 represents the L/7 lens specification request,
The word signal WORD4 represents the manufacturer number (the code is undefined), the word signal WORD5 represents the lens number code (the lens number code is undefined), and the word signal WORD6 represents the presence/absence of the unit. Note that these mechanical numbers and lens numbers must be registered.

Although not shown, the word signal WORD6 converts the bit signals bO1b1, b2, . . . , bl into units) 0
, 1.2, ..., 7, and when the value is 1", the unit is connected to the imaging lens (
16), and when it is "0", it indicates that the unit is not present in the imaging lens (16).

FIG. 14 shows the contents of the status signal LTC in the case of the initial unit specification packet.

Unit expression part of status signal LTC in case of initial lens specification packet (word signal WORD2~
WORD9''), the first word signal -0RD2 represents the unit number mentioned above, and the word signal -0R
D3 represents unit specification request, and word signal WORD4
represents the lower digit of the minimum (M I N) value of the specification, the word signal WORD5 represents the upper digit of the minimum (M I N) value of the specification, and the word signal 110RD6 represents the maximum (MAX) of the specification.
The word signal WORD7 represents the upper digit of the maximum (MAX) value of the specification, and the word signal -〇RD8 represents control function information @ (represents how the function of the unit can be controlled). ), and the word signal WORD9 is an absolute area valid bit (represents the maximum value of the area encoder)
represents.

In addition, the word signals -〇RD4 and WORD5 indicate the respective minimum values of distance, F value, and focal length of each unit, that is, autofocus (AF), aperture (IRIS), and zoom (ZOOM), in 4-digit BCD. The lower two digits and upper two digits of the expression are shown. Word signal WORD6 and penalty RD7 are automatic focus (AF), aperture (IRIS) and zoom (Z
The lowest two digits and the highest two digits of the respective minimum values of distance, F value, and focal length of OOM) expressed in four-digit BCD are shown.

Furthermore, in word signal WORD8, bit signal b
3 indicates on/off of automatic function, bit signal b4, b
5 represents the distinction between relative position control, absolute position control, relative amount control, and absolute amount control, bit signal b6 represents the possibility of control on the camera device main body (1) side, and bit signal b
7 indicates the presence or absence of an automatic function.

In word signal qWORD9, the maximum value of the area encoder of the unit is represented by bit signals bO to b3.

Next, the contents of the unit expression part of the control signal CTL during control will be explained. FIG. 15 shows the contents of the control signal CTL during control. The control signal CTL during control is the word signal -0R.
It has a 4-byte first unit expression section consisting of signals 02 to -0RD5, and a 4-byte second unit expression section consisting of word signals -0R06 to signal WORD9,
Word signals WORD2 and WORD6 represent unit numbers, respectively, word signals WORD3 and WORD7 represent control system commands, and word signals WORD4 and WORD7 represent control system commands, respectively.
RD5, WORD48, and WORD9 each represent a control amount (if required by a command).

As shown in FIG. 12, the unit numbers are determined by using the 3-bit bit signals bO1bl and b2 of the word signals -〇RD2 and WORD6, respectively, for units 0.1, .
......, represents 7.

Although not shown, the word signals WORD2 and WOR
Using 2-bit bit signals b4 and b5 of D6,
It represents the distinction between relative position, absolute position, relative amount, and absolute amount.

Next, the contents of the unit expression part of the status signal LTC during control will be explained. FIG. 16 shows the contents of the status signal LTC during control. The status signal LTC during control includes a 4-byte first unit expression section consisting of word signals WORD2 to WORD5, and a word signal WORD6.
It has a 4-byte second unit expression section consisting of ~signal -〇RD9, and word signals -0RD2, WORD6.
represents the unit number, and the word signal WORD3
, WORD7 represent the status, and the word signal W
ORD4 and WORD8 are area data and WOR respectively.
D5 and WORD9 each represent the relative control amount (if required by the command).

The unit number is determined by using the 3-bit bit signals bO1bl and b2 of the word signals WORD2 and WORD6, respectively, as shown in FIG.
......, represents 7.

In addition, the valid/invalid flag (“1” when valid,
When invalid, it represents “0”), and when invalid, bit signal bO1b
Regardless of the values of 1 and b2, the unit number has no meaning.

Furthermore, the 2-bit bit signals b4 and b5 of the word signals WORD2 and 0RD6 are used to represent relative position, absolute position, relative amount, and absolute amount.

Furthermore, the word signal -0RD3 and the punishment RD7 each represent the on/off of the function with the focus signal bO, and the bit signal b1
represents the end point -, the bit signal b2 represents the end point, and the bit signal b3 represents the macro (when using a zoom lens). Note that the end points +/- represent the positive and negative directions of the amount controlled by each unit, and the end points + and - are respectively ■ and
Near (NEAR), aperture is O17 (OPEN), close (CLO3E), and zoom is telephoto (E).
, wide angle (WIDE).

Further, the word signals WORD4 and WORD8 represent the position of the unit based on the focus signals bO to b3, respectively.

Next, a communication sequence performed between the microcomputers (3) and (4) of the camera device main body (1) and the lens device (2) will be explained.

This communication sequence can be divided into a communication sequence at an initial stage after power-on, that is, an initial sequence, and a communication sequence at a subsequent control stage.

First, the initial communication sequence will be explained with reference to FIGS. 17 and 18. After the lens device (2) is attached to the camera device main body (1), the power source (10) is turned on (step 5T-1).

In this way, the microcomputer (3) on the camera side transmits a control signal CTL (CTL start packet signal) (see Fig. 10) to the microcomputer (4) on the lens side during the field periods F1 and F2 ( Step 5T-2).

The determination means of the microcomputer (4) on the lens side is
Step 5T-3) Determine whether or not the CTL start packet signal ■ is received during the field period F1.
, if not received, return to step 5T-2; if received, the lens side microcomputer (4) sends a status signal LTC (LTC) to the camera side microcomputer (3) with the same bit pattern as the received signal.
A start packet signal) (answer back signal) (see FIG. 11) is transmitted in the field period F2 (step 5T-4).

The determination means of the microcomputer (3) on the camera side is
Step 5T to determine whether or not the L'rC start packet signal ■ has been received in the field period F2.
-5) If not received, return to step 5T-2,
When receiving a message, the camera's microcomputer (3
) is incremented by 1 (decimal number) (step 5T-6), and then the count value increases to 4 (decimal number).
The microcomputer (
Step 5T-7), No.
If so, return to step 5T-2 and send the CTL start packet signal ■ between the camera-side microcomputer (3) and the lens-side microcomputer (4), respectively.
and the LTC start packet signal (2) are transmitted and received, and when the count value of the counting means reaches 4 (here, in the field period F5), the process advances to step 5T-8.

Furthermore, depending on whether the count value of the counting means reaches 4 or not, the contact point (2) between the camera device main body (1) and the lens device (2)
5) The electrical connection state due to the contact of (26) can be detected, and the electrical connection between the camera device main body (1) and the lens device (2) can be detected before the count value of the counting means reaches 4. If it is determined that the electrical connection is not possible, the microcomputer (3) generates an electrical connection disable signal and connects the CRT (15) of the viewfinder (14).
Display that electrical connection is not possible.

In FIG. 1, a current detection means is provided in the camera device main body (1) in the current supply path of its power source (10) to the lens device (2), and its detection output is supplied to the microcomputer (3). When no current is detected, the microcomputer (3) generates an electrical connection disable signal, and the CRT (15) of the viewfinder (14)
It is also possible to display on the tube surface that the electrical connection is not possible.

The determination means of the microcomputer (4) on the lens side is as follows:
In the field period F5, it is determined whether or not the CTL start packet signal ■ is received.Step 5T-3)
If it is not received, return to step 5T-2, and if it is received, the lens side microcomputer (4) informs the camera side microcomputer (3) of the field period F.
At step ST-6, the LTC start packet signal ■ is transmitted (step ST-4).

Then, in field period F5, it was found that the count value of the counting means reached 4, so step 5T-8
Then, the camera-side microcomputer (3) sends a control signal CTL to the lens-side microcomputer (4).
(Lens specification request packet signal) (See Figure 10)
is transmitted in field periods F6 and F7 (step 5T-8).

The determination means of the microcomputer (4) on the lens side is
During the field periods F6 and F7, it is determined whether the lens specification request signal ■ is received from the microcomputer (3) on the camera side (step 5T-9), and if it is not received, the process returns to step 5T-2; In this case, the lens-side microcomputer (4) sends the status signal LTC to the camera-side microcomputer (3).
(lens specification signal) [stored in the memory (22)] (see Figure 13), respectively, during the field period F7.
, F8 (step 5T-10).

The determination means of the microcomputer (3) on the camera side is
During the field period F7 and F8, the lens specification signal ■
If it is not received, return to step 5T-2, and if it is received, the camera side microcomputer (3) will send the unit number to the lens side microcomputer (4). is X
A control signal CTL (first unit specification request packet signal) (see FIG. 10) is transmitted during field periods F8 and F9 (step 5T-12).

The determination means of the microcomputer (4) on the lens side is
In the field periods F8 and F9, it is determined whether or not the first unit specification request packet signal ■ has been received (step 5T-13). If not, the process returns to step 5T-2; if it has been received, the microcomputer on the lens side (4) transmits a status signal LTC (first unit specification signal) ■ with unit number X to the camera-side microcomputer (3) in field period F9 and Flo (step ST-14).

The determination means of the microcomputer (3) on the camera side is
In field period F9, in FIO, it is determined whether or not the first unit specification signal ■ is received.Step 5T-15
), if not received, return to step 5T-2; if received, the camera-side microcomputer (3) sends a control signal CTL with unit number Y to the lens-side microcomputer (4) (second unit Specification request packet signal) (see FIG. 10) is transmitted in the field periods FIO and Fil (this step is omitted from illustration in FIG. 17).

The determination means of the microcomputer (4) on the lens side is
In the field period FIO1Fil, it is determined whether or not the second unit specification request packet signal ■ has been received (this step is omitted from illustration in FIG. 17); if not received, the process returns to step 5T-2; The lens side microcomputer (4) sends the status signal LTC (second unit specification signal) with unit number Y to the camera side microcomputer (3).
(2) is transmitted in the field period Fil, F12 (this step is omitted from illustration in FIG. 17).

The determination means of the microcomputer (3) on the camera side is
In the field period Fil, F12, it is determined whether or not the second unit specification signal ■ has been received (this step is omitted from illustration in FIG. 17), and if it is not received, the process returns to step 5T-2; In this case, the camera side microcomputer (3) sends the control signal CTL (third unit specification request packet signal) (see Figure 10) with unit number Z to the lens side microcomputer (4) during the field period. Transmit at F12 and F1a (step 5T-16).

The determination means of the microcomputer (4) on the lens side is
In the field periods F12 and FI3, it is determined whether or not the third unit specification request packet signal ■ has been received (step 5T-17), and if not received, step 5T-2
When the microcomputer (4) on the lens side sends the status signal LTC (3rd unit number) to the microcomputer (3) on the camera side,
unit specification signal) @l, field period F13,
Transmit at F14 (step 5T-18).

(not shown in the figure).

Next, regarding the control communication sequence, FIGS.
This will be explained with reference to the drawings and FIG. 19.

The determination means of the microcomputer (3) on the camera side is
In the field period F13, it is determined whether the third unit specification signal [phase] is received (step 5T-19).
, if not received, return to step 5T-2; if received, the microcomputer (3) on the camera side informs the microcomputer (4) on the lens side, for example, that the unit number is 0 (AF) and the unit number is 1.
(IRIS) control signal CTL (see Figure 15) (first control command signal)
(Step 5T-20).

The determination means of the microcomputer (4) on the lens side is
In the field period F14, it is determined whether or not the first control command signal ■' has been received.Step 5T-21)
If not received, return to step 5T-2; if received, the microcomputer (4) on the lens side informs the microcomputer (3) on the camera side that the unit number is Q (AF) and the unit number is 0 (IRIS).
The status signal LTC (see FIG. 16) (first controlled status signal) ■' is transmitted in the field period F15 (step 5T-22).

The determination means of the microcomputer (3) on the camera side is
In the field period F15, it is determined whether or not the first controlled status signal)■' has been received.Step 5T-2
3) If not received, return to step 5T-2; if received, the camera-side microcomputer (3) informs the lens-side microcomputer (4) that the unit number is 0 (AF) and the unit number is 2. (ZO
OM) control signal CTL (see FIG. 15) (second control command signal) is transmitted in field period F15 (step 5T-24).

The determination means of the microcomputer (4) on the lens side is
In the field period F15, it is determined whether or not the second control command signal ■' has been received (step 5T-25);
If it is not received, return to step 5T-2, and if it is received, the microcomputer (4) on the lens side informs the microcomputer (3) on the camera side that the unit number is 0 (AF) and the unit number is 2 (ZOOM).
) status signal LTC (see FIG. 16) (second controlled status signal) is transmitted in field period F16 (step 5T-26).

The determination means of the microcomputer (3) on the camera side is
In the field period F16, it is determined whether or not the second controlled status signal )■' is received.Step 5T-2
7) If not received, return to step 5T-2; if received, return to step 5T-20, and repeat the above control operations.

〔Effect of the invention〕

According to the above-described first aspect of the present invention, the camera apparatus main body allows the lens apparatus attached to the camera apparatus main body to satisfy desired imaging conditions, regardless of the optical characteristics of the lens apparatus attached to the camera apparatus main body. A video camera device that can be accurately controlled can be obtained.

Further, according to the second aspect of the present invention described above, regardless of the type of lens device attached to the camera device main body, the camera device main body accurately adjusts the lens device attached to the camera device main body so as to satisfy desired imaging conditions. It is possible to obtain a video camera device that can control the image quality and obtain a video signal of the best image quality from the imaging means in units of one or more fields, depending on the optical characteristics of the lens device.

Furthermore, according to the third aspect of the present invention described above, it is possible to obtain a video camera that can easily detect the electrical connection state between the camera device main body and the lens device attached to the camera device main body.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the mounting surface of the camera device main body of the embodiment, and FIG. 3 is a diagram showing the mounting surface of the lens device of the embodiment. Fig. 4 is a waveform diagram of signals transmitted and received between the microcomputers of the camera device body and the lens device, Fig. 5 is an explanatory diagram of the packet structure, and Fig. 6 is the -〇 of the header part of the control signal and status signal. An explanatory diagram of the contents of RDO, Fig. 7 is an explanatory diagram of the packet length, Fig. 8 is an explanatory diagram of data types, Fig. 9 is an explanatory diagram of the contents of WORDI in the header section, and Fig. 10 is an illustration of the initial control signal. Figure 11 is an explanatory diagram of the contents of the status signal in the case of the status command at the time of initialization, Figure 12 is an explanatory diagram of the definition of the unit number, and Figure 13 is the lens specification packet at the time of initialization. Fig. 14 is an explanatory diagram of the contents of the status signal in the case of the initial unit specification packet. Fig. 15 is an explanatory diagram of the contents of the control signal during control. Fig. 16 is an explanatory diagram of the contents of the status signal during control, FIG. 17 is a flowchart of the embodiment of the present invention, and FIG. 18 is an explanatory diagram of the initial and control communication sequence.
FIG. 19 is an explanatory diagram of the control communication sequence. (1) is the camera device body, (2) is the lens device, (3)
is a microcomputer on the camera side, (4) is a microcomputer on the lens side, and (5) is an imaging means. Header '811 Expression for one unit Header section One unit Expression for one unit Groove structure of the expression packet for one unit Figure 5 WORD content of header section Figure 6 Waveform Figure 4 b5 Packet length = 6 bytes (1 unit, 1 unit) ) 10 bytes (2 units) 14 bytes (3 units) 18 bytes (4 units) (40+2) bytes n; Number of units 0RD0 bo bl b2 b3 b4 b5 b
6 b7xLOOO XXXX Data type Figure 8 WO1'? D8 0RD9 Check code undefined 1 0 1 0 CTL o 1 0 l WO in LTC header part
Contents of RDI Figure 9 Contents of control signal CTL Figure 10 WORDO WORDI 0RD2 0RD3 0RD4 0RD5 0RD6 0RD7 0RD8 0RD9 Start command unit O Unit l Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Function F R5 200M □ Yanyi □ □ Consultation Contents of status signal LTC in case of start command at initial time Figure 11 Definition of unit number Figure 12 0RDO 0RDI 0RD2 0RD3 0RD4 0RD5 0RD6 WORD? 0RD8 0RD9 bo bl b2 b3 b4 b5 b
6 b7xxxx1000 0101xxxx oooooooo. 00001000 Lens f-MM manufacturer number Code undefined Lens number Code m Unit presence/absence ooooooooo. ooooooooo. ooooooooo. 0RDO 0RDI 0RD2 0RD3 0RD4 0RD5 0RD6 WORD? 0RD8 0RD9 bo bl b2 b3 b4 b5 b
6 b7xxxx100G 0101xxxx Unit number f" Brown MIN value a■ Wild medicine MIN value Ogo specifications MAXII! Crt's C1 I MAX Hani Ogo's tsat gate absolute area effective bit unit (Subject bag request Status signal in case of lens specification packet at initial time Contents of LTC Fig. 13 In case of unit specification 1 daughter packet at initial time Contents of the status signal STC Figure 14 bl Contents of the status signal LTC when controlling the contents of Hori L

Claims (1)

[Scope of Claims] 1. A video camera device comprising a camera device main body including an imaging means for obtaining a video signal, and a lens device attached to the camera device main body, wherein the camera device main body and the lens device are each A microcomputer capable of communicating with each other is provided, the microcomputer of the camera device main body is provided with means for transmitting a data transmission request signal and a means for transmitting a control signal to the microcomputer of the lens device, the lens device The microcomputer includes means for transmitting an optical characteristic data signal unique to the lens device and a means for transmitting a controlled state signal to the camera device body, and the lens device is attached to the camera device body. In the initial stage after the data transmission request signal is received, the microcomputer of the camera device main body transmits the data transmission request signal to the microcomputer of the lens device, and in response to the reception of the data transmission request signal, the microcomputer of the lens device transmits the data transmission request signal. The computer transmits the optical characteristic data signal to the microcomputer of the camera device body, and in a control stage after the initial stage, the microcomputer of the camera device body transmits the received optical characteristic data signal. Based on the data signal and the controlled state signal,
A video camera device characterized in that the control signal is transmitted to a microcomputer of the lens device. 2. The data request signal, the control signal, the optical characteristic data signal, and the controlled state signal are used for video signals obtained from the imaging means in each microcomputer of the camera device main body and the lens device. 2. The video camera device according to claim 1, wherein the video camera is generated in synchronization with a vertical synchronization signal. 3. In a video camera device comprising a camera device main body equipped with an imaging means for obtaining a video signal, and a lens device attached to the camera device main body, the camera device main body and the lens device are capable of communicating with each other. a microcomputer; the microcomputer of the camera device body includes means for transmitting a connection confirmation data transmission request signal to the microcomputer of the lens device; the microcomputer of the lens device transmits the connection confirmation data transmission request signal; A means for transmitting a connection confirmation signal to the microcomputer of the camera device body in response to reception of the signal is provided, and the microcomputer of the camera device body is configured to transmit a connection confirmation signal from the microcomputer of the lens device. A video camera device comprising means for detecting presence or absence.