JPS59125179A - Camera capable of video photographing together with photosensitive film photographing - Google Patents

Abstract

PURPOSE:To obtain a camera device which is capable of the video photographing together with the photosensitive film photographing by providing a solid state image pickup layer which receives the light from an object and an output terminal which transmits the information on said image pickup layer to a VTR set separately. CONSTITUTION:The photographing light transmitted through a photographing lens 1 is made incident to a focal plate 6 via a reflecting mirror 5. The plate 6 contains a solid state image pickup layer 12, and a solid state picture display device consisting of a reflecting liquid crystal cell is provided at the back side of the layer 12. In a video photographing mode the output signal sent from the layer 12 is extracted from a cable output terminal (not shown in the figure) and recorded to a VTR set separately. While in a film photographing mode the mirror 5 is shifted from an observing position, and the light of an object is directly picked up to a film 10 via a focal plane shutter 11.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a camera capable of photographing both photosensitive film and video. In recent years, video tape recorders have become more compact in video recording, and cameras that integrate video tape recorders and video cameras have also been proposed.

The first object of the present invention is to provide a solid-state imaging layer in which a photosensitive section receives object light and an output terminal on the camera to transmit information from the solid-state imaging layer to a separate video tape recorder so as to record video. To provide a camera capable of photographing a photosensitive film and a video by carrying a separate video tape recorder only when the camera is used.

A second object of the present invention is to provide a release button for photosensitive film shooting and a release button for video shooting, so that even if the release button for photosensitive film shooting is pressed during video shooting and photosensitive film shooting is performed, there is no problem in video shooting. To provide a camera capable of video photography as well as photosensitive film photography.

FIG. 1 shows a perspective view of a single-lens reflex camera according to the present invention and a perspective view of a video tape recorder for magnetically recording video signals from the single-lens reflex camera. (1) is an interchangeable lens for an eye-reflex camera; (2) is an eye-reflex camera body; ), -1 upper lever (2c), shutter tire (2d), exposure compensation dial (2e), film rewind knob (2f), film latitude setting member (
2g), video signal output terminal (2h), eyepiece (
21) and a film shooting information confirmation button (2k).

(3) Vi - Connector (2h) that connects to the video signal output terminal (2h) of the SLR camera with a cable that transmits the video signal from the SLR camera to the video tape recorder.
The connector (3b) is connected to the video signal input terminal (4a) of the video tape recorder (4). The video tape recorder (4) is a compact one that uses, for example, a VH8-C type cassette.

FIG. 2 is a sectional view of a single-lens reflex camera body according to the present invention. (1) C interchangeable lens, (5) C reflective mirror,
As is well known, the photographing light transmitted through the photographing lens is passed through the focusing plate (6).
reflected to. Note that the reflecting mirror (5) K is provided with a light receiving section (5a) that averages the light transmitted through the photographic lens.

(7) Film screen frame on the body side, (8) is the back cover,
(9) fl pressure bonding plate, θBt photosensitive film, α]) is a focal plane Yutter.

In the embodiment of the present invention, the focus plate (6) includes a solid-state imaging layer (6) and a solid-state image display device on the back side of the solid-state imaging layer α. al is a condenser lens, 04 is a pentaprism, and (2i)H is an eyepiece. In the embodiment of the present invention, a reflective liquid crystal cell is provided as a solid-state image display device, and external light is incident through a window OQ.

Figure 3 shows a cross-sectional view of the focus plate (6), and shows the transparent glass plate (
A liquid crystal cell is provided between 6a) and (6b), and a solid-state imaging layer α includes a metal reflective electrode of the liquid crystal cell.

The peripheral liquid crystal cell functions as a transmissive liquid crystal, and as described later, transmits or blocks photographing light incident on the peripheral part of the focus plate (6) by controlling the transparent electrode. Note that when transmitting light, the liquid crystal cell functions as a focus plate. Note that it is also possible to configure the riverside portion to be a focus plate made of a glass plate instead of a liquid crystal cell.

FIG. 4 shows a perspective view of the focusing plate (6), and the solid-state imaging layer (b) includes a color filter (12c), a solid-state imaging device (12d), and a solid-state imaging layer (b).
), a vertical scanning circuit (12a) that scans the signal of the solid-state image sensor (12d), and a horizontal scanning circuit (12b).
, it should be composed of the metal reflective electrode (12e) of the liquid crystal cell.

FIG. 5 shows a partial electric circuit configuration centered on a solid-state imaging layer and a solid-state image display device, in which a large number of photosensitive elements P such as photodiodes are arranged in a grid pattern, and the light incident on each photosensitive element P is The corresponding accumulated signal charges are sequentially scanned and read out by a vertical scanning circuit (12a) and a horizontal scanning circuit (12b). F is a scanning switch composed of an MO8 type transistor. The signal charges accumulated in the photosensitive elements PK are input to the amplifier circuit 0Q, and the output terminal (16a) of the amplifier circuit ◇→ receives a voltage logarithmically compressed amount of light incident on the photosensitive elements P arranged in a grid pattern. Configure for output. Switches S and d are in a conductive state at 1 immediately before activation, and are cut off when the reflection mirror (5) is activated.

Switch 52t-t film shooting information confirmation button (2k)
This is a switch that can be operated to shut off the power. Switch S3d is a switch that conducts when winding is completed and is shut off when the shutter operates. When the winding is completed, the semiconductor control element 0η becomes conductive just before the reflection mirror (5) operates, and therefore the voltage across both terminals of the resistor is applied to the source of the MO8 type transistor 0→, and the output voltage of the amplifier circuit θ→ Memo II corresponds to a large number of photosensitive elements P arranged in a grid pattern.
-#f). When the reflective mirror (5) is activated, the switches S and fl are cut off, and the semiconductor control element (1f) is cut off, so the MO3 type transistor 0 is also cut off.
Information on the light incident on the photosensitive element P just before the reflection mirror (5) is activated is stored in a memory (2).Transistors T1, T2Y'i constitute a differential amplifier circuit, and a MO8 type transistor has a resistor at one source. When voltage is applied to both terminals of the group and the reflection mirror (5) is at the observation position, the switch S1 is conductive, so the transistors 'r and Vi are conductive, and the MO8 type transistor (11 is also conductive).
When the voltage at both terminals of the resistor is applied to the source of the O3 type transistor (a), the reflection mirror (5) is operated and the switch S is cut off, and the transistor T'l and the MO8 type transistor 01 are cut off. transistor T
2 becomes conductive, and the MO8 type transistor wire also becomes conductive. Therefore, when the reflection mirror (5) is at the observation position at the output terminal A, the information of the amplifier circuit oQ is transmitted to the reflection mirror (5).
) is activated, the information in the memory OP is input.

(a) is a change-over switch for separating color signals, which sequentially separates the color signals corresponding to the color filter (12c) to obtain red (R), green (G), and f (B) signals. The signal from the light receiving section (5a) provided on the reflecting mirror (5) is input to the photometric circuit (e), and the output terminal (23a) of the photometric circuit @
It is configured to output a voltage that is logarithmically compressed amount of light that passes through the photographic lens L and enters the light receiving section (5a). (
C) is an exposure compensation circuit, which can be controlled by an exposure compensation dial (2e). The output of the photometric circuit board and the output of the exposure compensation circuit (c) are input to an operational amplifier oP1 and calculated.

The output of the output terminal A is input to the operational amplifier OP2 together with the output of the operational amplifier oP1, and calculations can be performed. Therefore, the light receiving section (5
The difference between the output of the operational amplifier OPl with exposure correction taken into account in the information in a) and the output of the light incident on the photosensitive elements P arranged in a grid pattern becomes the output signal of the operational amplifier oP2. As will be described later, exposure control is automatically controlled according to the output of the operational amplifier 5P, so the difference between exposure due to light incident on the photosensitive elements P arranged in a grid pattern and exposure under automatic control. becomes the output of operational amplifier OP2. The output of operational amplifier OP2 is the film latitude setting circuit (c)
Gamma correction is performed according to the gamma characteristics of the film being photographed. Film latitude setting circuit (c)
The specific circuit configuration is described in Japanese Patent Application No. 57-19124. The gamma characteristics of the film to be photographed are set by a film latitude setting member (2g). The output voltage of the film latitude setting circuit (2) is input to an MO8 type transistor of a liquid crystal which is a solid-state image display device. Each unit pixel element of a liquid crystal, which is a solid-state image display device, is composed of an MO8 type transistor screen, a storage capacitor (a), and a liquid crystal cell), and a large number of them are arranged in a grid pattern corresponding to the photosensitive elements P. The scanning signal of the vertical scanning circuit (12a) is applied to a group of MO8 type transistors in the horizontal direction,
When the MO8 type transistor (G) is turned on by the scanning signal, the output signal of the film latitude setting circuit is transmitted via the scanning switch F and the MO8 type transistor @ controlled by the scanning signal of the horizontal scanning circuit (12b). A storage capacitor (a) corresponding to the photosensitive element PK is connected to the photoelectric type. Even if the scanning signal disappears and the MO8 type transistor) is cut off, the charge accumulated in the capacitor continues to apply the voltage to the liquid crystal cell, and the liquid crystal cell remains dynamic depending on the voltage. Since the magnitude of scattering t is changed, the light passing through the liquid crystal cell (c) can continue to be modulated by the output signal of the film latitude setting circuit (g). Therefore, it is possible to monitor and display images that are actually photographed in consideration of the gamma characteristics of the film photographed by the liquid crystal cell (c) corresponding to the photosensitive element P.

FIG. 6 shows the overall electrical circuit of a single-lens reflex camera and videotape recorder according to the invention.

The outputs of the photometry circuit (g) and the exposure compensation circuit (c) are calculated by the operational amplifier OP1. The circuit block block is a film sensitivity conversion circuit, and includes a sliding resistor R14 that is slid by a film sensitivity setting member (not shown) and a voltage dividing resistor R16+RI6 that sets a predetermined film sensitivity in the case of video shooting.
Consists of. The switch 84 is a switch that becomes conductive when the video shooting release button (2b) is operated.
a Release button (2a) for photosensitive film photography as described later
T4t- is a transistor that is conductive when not being operated, is conductive when the reflecting mirror (5) is at the observation position, and is shut off when the mirror (5) starts moving from the observation position to the photographing position.

Transistor 'r5+'r6 and transistor T
7+T8 each constitute a differential amplifier, and when the video shooting release button (2b) is operated and the switch s4 is turned on, the transistors 'r, , 'r, and 1d are on, so the transistors T5+T7 are turned on and the voltage dividing resistor is turned on. The circuit should be configured so that the information of R15+R16 is valid. When the video shooting release button (2b) is not operated, the switch s4h is cut off, the transistor T'r6+T8 becomes conductive, and the information on the sliding resistor R14 becomes valid. Circuit block 01 is a recording speed setting circuit, and transistor 'r91 TIO and transistor To + TI□ each constitute a differential amplifier, and when the video shooting release button (2b) is operated, switch S4 is activated.
When conducts, the transistor TIO+ T! The circuit is configured in such a way that the voltage dividing resistors R17+RI8, which set a predetermined shutter speed for video shooting, become valid. When the video shooting release button (2b) is not operated, the switch S4 is completely cut off, transistors T9+TI+ are conductive, and the shutter dial (2d
) is valid. Output terminal (29) of film sensitivity conversion circuit (c)
a) Input to fi operational amplifier OP3 and operational amplifier OP
The output of the memory circuit 0 is calculated and input to the memory circuit 0 via the memory switch 0, and the output of the memory circuit 0 is the comparator circuit 0.
) is entered.

Switch S5 Release button for photosensitive film photography (2a)
A switch that becomes conductive when pressed, transistor TI3
+ T14 is a transistor constituting a differential amplifier. When the release button (2a) for photosensitive film photography is not operated, the transistor T14 is in a conductive state, and the voltage at both terminals of the resistor R-1 (l is applied to the base. The transistor T3 is also in a conductive state.However, when the release button (2a) for photographing photosensitive film is pressed during video shooting and the switch S5 is made conductive, the transistor TI3 is turned on and the transistor TI4 is turned off.
Since transistor T3 can be cut off, resistor R20r R
21+R2□ is not energized, so the transistors 'r61TR+'r9+T11 become conductive, and the information of the sliding resistors RI4+RI9 becomes valid, so the information on the film sensitivity and image speed for photosensitive film photography is available. They are output from circuit blocks (e) and (7), respectively.

NOR circuit (c) A voltage across both terminals of Kn resistors R20+R37 is input, and the output thereof is input to the base of transistor TI5. Electricity is applied when the resistor R20n switch S4 is conductive, and electric current is applied when the resistor R37 switch S5 is conductive, so when the release button (2a) for photosensitive film shooting and the release button (2b) for video shooting are not operated. Only the transistor T15 becomes conductive, and the collector voltage of the transistor T15 is inputted to the comparator circuit OAK, and the information in the memory circuit 0 and the collector voltage of the transistor 1'+s are compared, but since the collector voltage is always higher than the output voltage of the operational amplifier oP3. Drive the electromagnetic device (G) as much as possible to open the aperture blades. 1, so the release button (2a) and f'1 (
2b), as is well known, the photographic lens aperture is opened and subject light is incident on the focus plate (6). When the release button (2a) or (2b) is operated, the NOR circuit (b) becomes L and the transistor TI5 is cut off. The output terminal (30a) of the shutter speed setting circuit (30a) is applied to the base of the transistor TI6, and the emitter potential is input to the comparison circuit (to), so when T15 is cut off, the output terminal (30a) of the shutter speed setting circuit (7) is applied. Output terminal (
The information 30a) is input to the comparison circuit 01, and the photographing lens aperture (not shown) is automatically controlled by the electromagnetic device (g). The switch 86 is a switch that is connected to the a terminal when the winding is completed, and is connected to the b terminal when the second curtain of the focal plane winder (not shown) starts running. A mirror mechanism (not shown) that drives a reflecting mirror (5) with a release electromagnet is used to release the release. When the winding is completed and the switch S6 is connected to the a terminal, the photosensitive film photographing release button (2a) is pressed and the switch 851 is connected to the transistor to which the voltage across both terminals of the resistor R37 is applied to the base. TI7 is also conductive, resistor R4□ and capacitor
After a predetermined period of time caused by C1, the transistor TIB+T19 constituting the semiconductor control element becomes conductive, the release electromagnet (T) is excited, and the mirror mechanism (not shown) is released.
Let's go. Therefore, the reflecting mirror (5) t- is moved to the photographing position. The predetermined time is for waiting the time for the aperture to be automatically controlled by the electromagnetic device (2).

The memory switch 0 is cut off just before the anti-money mirror (5) is moved, and the output of the operational amplifier OP3 is stored in the memory circuit 0■, and the transistor T4 is also cut off just before the anti-q1 mirror (5) is moved, so the video While shooting, press the release button (
Even if you press 2a) and shoot with photosensitive film, the sliding resistance R
Information V of I4 + RI9 remains active until the reflecting mirror (5) returns to the viewing position, and therefore the automatically controlled aperture also remains until the reflecting mirror (5) returns. When the movement of the reflection mirror (5) to the photographing position is completed, the focal plane and tar curtain move, and the electromagnetic device (
It is possible to control the running point of the second act and control the yatter speed through (g).

'r2oa When the reflective mirror (5) is turned on at the observation position, the reflective mirror (5) closes and the reflective mirror (5)
) returns to the observation position, the electromagnetic relay is energized, connected to the relay switch 57aC terminal, and the hoisting motor θ
Automatic winding is possible by exciting Q. When the hoisting is completed, the switch S6 is cut off from the b terminal, so the electromagnetic relay (g) is demagnetized, the relay switch S7 is connected to the d terminal, and the hoisting motor 01 is short-circuited and automatically stopped.

Transistor T21 + T22 fi constitutes a differential amplifier, and the voltage across both terminals of resistor RAG is
22 and transistor T22 n
Transistor T21 conducts only when video is being shot.
Conductive when not recording video.

The collector of transistor T21 is connected to 1fCt1 by voltage dividing resistors R43 and R44. The voltage at both terminals of this and R44 is applied to the transparent electrode (6c) at the periphery of the focus plate (6), and when T21 conducts, it is incident on the same side. The liquid crystal cell has the function of a focusing plate. Therefore, when shooting with photosensitive film, T21 is conductive, allowing the photographer to check ambient light, and during video shooting, T21F is conductive.
'i is blocked, so no voltage is applied to the transparent electrode (6C) and the subject light entering the peripheral area is blocked. Therefore, only the reflected light from the liquid crystal cell, which is a solid-state image display device, can be seen in the finder.

This is the circuit configuration of the circuit block Ul-i (video tape recorder), and the voltage at both terminals of resistor R2□ is
) is input to the drum control circuit (4]a) and the capstan control circuit (41b).

Therefore, when the video shooting button (2b) is operated, the switch S4d becomes conductive, so the voltage at both terminals of the resistor R22 becomes H, and the drum control circuit (41a) controls the phase and rotation speed of the tri video head θ→, and controls the cab scan motor. Control circuit (41b) controls the running of the magnetic tape in the video cassette.

However, when shooting a video, it is necessary to use photosensitive film.
When button (2a) is operated, transistor T3;l! i
When the reflection mirror (5) is cut off and the reflection mirror (5) is activated, the transistor ＼ T4 is also cut off, so the voltage between both terminals of the resistor R22 is 1-In.
, and the drum motor and capstan motor (not shown) stop. Nya, the tar has closed and the anti-11 la (5
) returns to the observation position and transistor T4 becomes conductive, the drum motor and capstan motor (not shown) can be driven again.

Color signals R, G, and B are separated sequentially using the changeover switch (A).
The signal is inputted to a t-t gamma correction circuit (b), a matrix circuit), a modulation circuit .theta., and an adder circuit .theta. and undergoes predetermined signal processing. The output of the adder circuit θ is input to a recording amplifier circuit (41c) together with the audio information from the microphone (9), and is magnetically recorded on a video cassette device via a video head (6). As explained in Fig. 5, when the reflecting mirror (5) is at the observation position, the information of the amplifier circuit θQ is inputted, and when the reflecting mirror (5) is activated, the information of the memo II-Jl) is inputted to the output terminal AK. When the photosensitive film photographing release button (2a) is operated, the reflection mirror (5) is operated from the observation position and the information of the memo 'J-al) is magnetically recorded on the video cassette θ→. Therefore, a configuration in which the drum motor and capstan motor do not stop is also possible.

Currently, NTSC is the color television system in each country.
Three systems are adopted: the PAL system, and the SECAM system, and depending on the color television system, a matrix circuit (g) that processes the color signal from the solid-state imaging layer α→, a modulation circuit θQ1 addition circuit @no are used to some extent. Different circuits may be provided in the camera body (2) or in the video tape recorder (4).

Information at output terminal A is input to the base of transistor T24, and output resistor R50 connected to the collector.
The voltage across both terminals is input to the contrast detection circuit (55). The OR circuit (52) l'' is connected to the vertical scanning circuit (12a
), for example, becomes H when four consecutive columns of scanning signals are input, and selection of the four consecutive columns of scanning signals can be performed using, for example, an up/down counter (not shown).

OR circuit (58) becomes H when the scanning signals of, for example, seven consecutive columns of t'i horizontal scanning circuit (12b) are input,
Seven consecutive rows of scanning signals are similarly selected by an up/down counter (not shown). The selected scanning signals of the vertical scanning circuit and horizontal scanning circuit are displayed on the periphery in the viewfinder (56), including a vertical distance measurement display (56a) and a horizontal distance measurement display (56b).
) The distance measurement range is displayed by moving the K. The output of the OR circuit (52) and OR circuit (53) is AND
The output of the AND circuit (54) is input to the base of transistor T23, and the collector of transistor T23 is connected to transistor T2.
4 emitters should be connected.

Since the output of the AND circuit (54) becomes H only when the distance measurement range is completely displayed on the finder (56), the transistors T23 + T24 are also conductive only when the distance measurement range is completely displayed on the finder (56).

Therefore, the contrast output of the photosensitive element P corresponding to the distance measurement range is outputted as a current of the transistor T24 and inputted to the contrast detection circuit (55). As is well known, the contrast detection circuit (55) f' adjusts the amount of extension of the interchangeable lens (1) so that the contrast output of the photosensitive element P corresponding to the distance measurement range is maximized.

FIG. 7 shows a perspective view of an embodiment in which accessories for signal processing into video signals of a desired color television system are disposed at the bottom of the camera body.

Accessories (50) Equipped with a matrix circuit corresponding to one of the l-18 methods), a modulation circuit θ→, and an adder circuit θ, and the information from the solid-state imaging layer α is sent to one of the three methods according to the circuit. A predetermined signal processing is performed according to the output terminal (5
0a) is input to the storage amplifier circuit (41c) of the video tape recorder (4) via the cable (3).

FIG. 8 is a perspective view of an embodiment in which an accessory for signal processing into a video signal of a desired color television system is disposed on a back cover that is detachable from the camera body.

The matrix circuit 9 and the modulation circuit @Q1 adder circuit θ provided on the back cover (51) perform the desired signal processing on the information from the solid-state imaging layer 0 according to the color television system, and output the information to the output terminal ( 51a) and is input to the storage amplification circuit (41c) of the video tape recorder (4) via the cable (3).

In the embodiment of the present invention, by moving the reflective mirror (5) to the observation position and photographing position, the photosensitive section of the solid-state imaging layer receives the subject light even when no photosensitive film is being photographed. It is also possible to configure (5) to be a semi-transparent film so that the photosensitive portion of the solid-state imaging layer receives subject light even during photosensitive film photography. Further, in the embodiment of the present invention, the solid-state imaging layer is disposed on the focusing plate, but it may be disposed on the focal plane.

[Brief explanation of drawings]

FIG. 1 shows a perspective view of a single-lens reflex camera and a video tape recorder for magnetically recording video signals from the single-lens reflex camera according to the present invention, and FIG. 2 shows a sectional view of the camera body. FIG. 3 shows a sectional view of the focusing plate, and FIG. 4 shows a perspective view of the focusing plate. FIG. 5 shows a partial electrical circuit diagram centered on the solid-state imaging layer and solid-state image display device, and FIG. 6 shows an overall electrical circuit diagram of the single-lens reflex camera and video tape recorder according to the present invention. Figure 7 is a perspective view of an embodiment in which accessories for signal processing into a video signal of a desired color television system are arranged at the bottom of the camera, and Figure 8 is a perspective view of an embodiment in which accessories are attached to the back lid that can be attached to and detached from the camera body. FIG. 3 shows a perspective view of the installed embodiment. (2h)...Video signal output terminal (3)...Cable αQ...Photosensitive film 0ne...Solid-state imaging layer 0 years old...Video head ■...Video cassette patent applicant Yoshiyoshi Tsujiki Procedures Letter of Supplement (Mr. Kazuo Wakasugi, Director General of the Japan Patent Office, Hogen) 1 Description of the case Patent Application No. 679 of 1982 2 Title of the invention Camera capable of shooting video as well as photosensitive film 3 Relationship with the person making the amendment Patent applicant

Claims (1)

[Claims] 1) The photosensitive section has a solid-state imaging layer that receives subject light and an output terminal that can transmit the output signal of the solid-state imaging layer to a separate tape recorder via a cable. A camera that can shoot video as well as photosensitive film. 2) A solid-state imaging layer in which the photosensitive section receives subject light, a video shooting release button and a photosensitive film shooting release button for magnetically recording the output signal of the solid-state imaging layer, and is used for shooting photosensitive film during video shooting. A camera capable of shooting a video as well as a photosensitive film, characterized in that when a release button is pressed to shoot a photosensitive film, a motor of a video tape recorder is stopped until the photosensitive film manipulation is completed. 8) A solid-state imaging layer whose photosensitive part receives subject light; a release button for video shooting, a release button for shooting photosensitive film, and a solid-state immediately before shooting during photosensitive film shooting for magnetically recording the output signal of the solid-state imaging layer; What is claimed is: 1. A camera capable of photographing a video as well as a photosensitive film, which is equipped with a memory for storing output signals from an imaging layer, and is characterized in that information in the memory is magnetically recorded when photosensitive film is shot during video shooting. 4) The memory that stores the output signal from the solid-state imaging layer immediately before photosensitive film shooting maintains the memory state when winding of the photosensitive film is completed 1, and by operating the confirmation button, it is possible to confirm the information on the photosensitive film that has been shot. The camera according to claim 8, characterized in that: 5) The camera according to claim 1, further comprising an accessory that processes information from the L1 solid-state imaging layer removably attached to the camera body into a video signal of a desired color television system.