JPS6018052B2 - camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dual-priority camera, and more particularly to a dual-priority camera that digitizes and visually displays photographic information.

In recent camera exposure meters equipped with automatic exposure control devices, there are two methods: the shutter priority method, which sets the shutter speed first and calculates the appropriate aperture value, and the other, which sets the aperture first and calculates the shutter speed. An aperture-priority system has been proposed that employs a dual-focus system that allows selection and switching between the aperture-priority system and the aperture-priority system.

In addition, in a dual-priority camera, when controlling the shutter speed or aperture, regardless of the priority mode, the shutter speed information is stored in the first register that stores a signal corresponding to the shutter speed.The aperture value information is the aperture value. A second register stores a signal corresponding to the value, and regardless of the priority mode, shutter control is performed based on the contents of the first register, and aperture control is performed based on the contents of the second register. The most common,
If a dedicated display was simply provided outside each register to display the information of the first register and the second register, it would not be possible to display which priority system the apparatus was switched to during photographing.

Therefore, in such a dual-priority camera,
When photographing, a display is required to show which priority method the device is switching to, and display means such as lighting a lamp have been used for this purpose.

As described above, when a display by lighting a lamp is incorporated into a camera or the like, the display device becomes complicated due to the lamp and the wiring used therefor, and there is a drawback that it is difficult for the photographer to clearly see the display during use. The present invention provides a dual-priority camera as described above, in which the selected shooting mode is displayed simply by regulating the display equipment of the information generating device, without using any means such as lighting a lamp. The purpose is to provide.

Based on this objective, the present invention provides a first display that displays preset values such as the shutter speed in the case of shutter-priority shooting and the aperture value in the case of aperture-priority shooting; A second display is provided to display the calculated value, such as the aperture value in case of aperture-priority shooting, and the shutter time in the case of aperture-priority shooting, so that the shooting information displayed on the first display can be The present invention is characterized in that by recognizing the type, the photographer can know which priority mode has been selected. The present invention will be explained in detail below with reference to the drawings. FIG. 1 is a circuit configuration diagram showing an embodiment of the display method according to the present invention. It is a digital display method that uses an existing information display device so that the position of the prioritized information display is always in the normal position. be. In the figure, the CPU is a control device that performs arithmetic processing of photographic information, and includes film sensitivity information (Sv), aperture information (Av),
Shutter time information (Tv), neck. Optical information (Bv) and other various correction information are input. Sv in the figure is an Sv information source set by, for example, a film sensitivity setting dial, etc.
v is an Av information source such as an aperture ring, Tv is a Tv information source set on a shutter dial, etc., and Bv is an information source of subject brightness information Bv from a spotlight device. Control device CP
In U, 5-bit registers indicated by R and R7 are provided with the required number of digits for display (7 digits in the figure). These registers R, -R7 store data obtained by encoding input information to the CPU into 5 bits. MPX is a multiplexer for sequentially outputting the data stored in registers R, ~R7 in chronological order, and DEC is a 5
A decoder converts bit data into a code signal suitable for display, SD is a segment driver, and SG is a display device using a 7-segment LED or the like. The PC is a timing pulse generator that outputs timing pulses of a constant period from a clock pulse generator included in the CPU. RC is a ring counter that outputs time-series strobe pulses using pulses from the PC. Each of the above circuits is already installed as a display device in a digitally controlled camera or the like. Next, SEL is a selection circuit for displaying the shooting mode according to the present invention, as shown in the figure, A, ~A? ,yeah'
It is composed of an AND circuit of ~A7' and an OR circuit of ORI~OR7, and generates a shutter priority signal SS or an aperture priority signal S.
Switched by S. DD is a digital driver. Next, the operation of the apparatus shown in FIG. 1 will be explained.

FIG. 2 is a timing chart for explaining the operation of the apparatus shown in FIG. In the diagram, for example, in the case of shutter priority shooting, the TV set to the shutter dial etc.
information, film sensitivity information SV, spotlight information BV, etc.
The respective information sources are introduced into the control device CPU', where digital calculations are performed to obtain appropriate aperture information AV. The above TV and AV are stored in 5-bit registers R, to R7. Now the register is ``200'' as shown.
05.6" is stored. These pieces of information are encoded into a 5-bit binary code as shown and transmitted to the multiplexer MPX. A timing pulse as shown in FIG. 2 is outputted from the quinary ripple counter PC every five clock pulses by the clock pulse (FIG. 2 1) from the CPU, and this is input to the heptad ring counter RC. RC sequentially synchronizes with the falling edge of the pulse from PC.2 Stroop pulses TDI to T in Figures 3 to 9
D7 is generated in chronological order. These pulses TDI to TD7 are transmitted to the multiplexer MPX, and for example, the contents of the shift register R, ie (
001010) is output from MPX. This signal is converted by the decoder DEC into a signal for driving each segment of the 7-segment display SG, and is transmitted to the SG via the segment driver SD. Simultaneously with the above operation, the strobe pulse TDI of the ring counter RC is transmitted to the selection circuit SEL and input to the AND circuits A, , A,'. In the case of Shitsuyu-Ryosaki, the signal SS is “1”,
Since SS is “0”, to is on and A,′ is off, and the output of A is sent to the digit driver D via ORI.
This will be communicated to D. The output of DD is input to the P, digit of the display device SG, thereby changing the contents of register R (00
110), that is, "6" is displayed in the P, digit of the force SG. Similarly, DD is applied to digits P2 to P7 of SG by strobe pulses TD2 to TD7 from RC.
The output of is input, and the contents of registers R2 to R7 are sequentially displayed in P2 to P7. Therefore, in the case shown in the figure, the SG display is "20005.6". The shutter speed "2000" is displayed on the left side, and from this position it can be determined that the device is in the shutter release mode. Next, in the case of aperture priority, the aperture priority signal S
S becomes "1" and SS becomes "0".

As a result, for example, the strobe pulse TDI from RC passes through the AND circuit A,' and is inputted to the digital driver DD via OR6, and its output is inputted to the P6 digit of the display device SG. Therefore, the P6 digit of SG displays the contents of register R, that is, (00110), and "61" is displayed on P6. Similarly, TD2 to TD7 are sequentially transmitted to DD, and the output of DD causes the display device SG to display "61". 5.610
00" is displayed. That is, this display identifies that the aperture priority mode has been switched from the aperture value "5.6" displayed on the left side. Next, as another embodiment of the present invention, a device will be described in which the photographing mode is identified by changing the color of the light emitted from the existing digital display device.

To switch the emitting color of the display means between two colors, a plurality of light emitting elements each emitting a different color is housed in one package, and each of these elements is turned on to emit visible light of a different color. A light-emitting element is used that has a structure that makes it appear as if light is emitted from the same location. A light emitting diode with such a structure has already been devised, and its structure consists of a silicon-doped Ga pseudo-infrared light emitting element on a metal frame and GaAs that emits red light. ．． 6Po. 4 light-emitting elements are bonded, and on top of these is a crab light-emitting substance NaYF4 that absorbs infrared rays emitted by the infrared light-emitting elements and emits green light;
YbEv powder was applied and the whole was molded with epoxy resin. The infrared light emitting element of this light emitting diode has DCI. When 3 V and 40 A are applied, infrared light with a wavelength of about 9600 A is emitted from the infrared light emitting element, which is absorbed by the crab light body and the entire crab light body layer emits green light. In addition, DCI. When 9 V and 20 A are applied, the red light emitting element emits red light, and the light is diffusely reflected by the crab phosphor powder, making the entire honey phosphor layer appear to glow red. When this is viewed through the epoxy resin lens, the entire light emitting diode will glow red or green depending on the switch. Light emitting diode as above
This constitutes a 7-segment digital display device, which can be used to digitally display various information such as a camera, a fluorometer, etc. FIG. 3 is a circuit diagram showing another embodiment of the present invention, in which the same parts as in FIG. 1 are designated by the same reference numerals.

In the figure, the part that differs from the embodiment in FIG. 1 is the selection circuit SE.
L2, digit decoder DD2, and 7-segment display node SG2. In this device, the SG2 is composed of the above-mentioned two-color light emitting diode elements, and the priority information and the calculation information are discriminated based on the color. The selection circuit SEL2 is composed of two sets of six AND circuits, and when an ON signal is applied to either the priority selection signal SS (for example, shutter priority) or SS (aperture priority), the strobe pulses TDI to TD7 from the ring counter RC are activated. AND circuit A, ~A7
Or input it to the digit decoder DD2 through either A or '~', for example, in the case of shutter priority
A green light emitting signal G is sent to the digits P7 to P4 of SG2, the shutter time is displayed in green light, and the P2 of SG2,
The aperture value is displayed in red light R in the P and digits. On the other hand, in the case of aperture priority, the SS signal is turned on, so the AND circuit A,
'～' is turned on, and the strobe pulse from RC is A.
, '~n' and input to DD2, P in SG2
The shutter time is displayed in red light R in digits 7 to P4,
The aperture value is displayed in the P2, P, digit with green light G. Therefore, the position of the information display on the display section SG2 does not change, and the selected priority and calculation information are identified by the 0 emission color. Next, FIG. 4 is a circuit diagram showing another embodiment of the present invention, in which the same parts as in FIG. 1 are designated by the same reference numerals.

In the figure, the difference from the embodiment in FIG. 1 is the selection circuit S.
EL3 and digital decoder DD37 segment display section S
It is G3. In this device, the P to P3 digits of the display section SG3 are configured with red light emitting displays, the P5 to P7 digits are configured with green light emitting displays, and only the P4 digit is displayed with red and green slits. The selection circuit is composed of two sets of six AND circuits and four OR circuits. First, if shutter priority is selected, terminal S
The S priority signal is turned on. As a result, the strobe pulses TDI to TD7 from the ring counter RC are ANDed.
A to the circuit through A7, the output to ~ is direct or OR6
, is input to DD3 via OR7 and its output is P of SG3.
Enter the shutter time in the 4 digits from 7 to P and display it in green. In this case, the output of A4 is input to the green display terminal of P4 via DD3, so P4 emits green light. Also A1,
The output of A2 is input to DD3 via OR1 and OR2,
The output is input to the P2, P, digits of SG3, and the aperture value is displayed in red R. Next, for aperture priority, AND times A
,' to A7' are opened by turning on the selection signal SS, and N',
The output of A,' is sent to P7 of SG3 via OR7 and OR6.
The aperture value is input in the P6 digit, and therefore the aperture value is displayed in green in the P7 and P6 digits. The outputs of '~A4' can be directly or OR2
, ORI to digits P4 to P of SG3, and the shutter time is displayed in red R here. In this case A5
Since the output of ' is inputted to the red display terminal of P4 via DD3, P4 emits red light. As described above, in this embodiment, the prioritized information is always displayed in green on the left side of the display section, and the calculated information is displayed in red on the right side, so that priority and calculated information can be identified by the display position and color. It will be held in Next, FIG. 5 is a circuit configuration diagram for constructing another embodiment of the present invention by inserting the circuit between the selection circuit SEL1 and the digit driver DDI in FIG. 1.

This embodiment is a digital display method for displaying all displays in different colors when proper exposure is impossible in the apparatus shown in FIGS. 1 and 2. When the signal CV indicating that proper exposure is not possible is turned on from the input terminal CV in FIG.
All four displays light up in red. Also, when CV is off (proper exposure possible), DD is connected to the green input terminal G of each digit.
Since the output is input, all the displays of the SG emit green light. In addition, the AND circuit A, ``to'' and the inverter 1, , et al, 15 shown in FIG. It shows. In addition, if a signal that is turned on when the film sensitivity is other than ASAIOO and turned off only when the film sensitivity is ASAIOO is inputted to the signal CV in FIG.
Multiple ANs via D circuit A6″ and inverter
The input information is input to D circuit A5'', and the input information can be displayed in green when it is ASAIOO, and in red when it is other than ASAIOO.Next, using the apparatus of the embodiment shown in Fig. 1, the speedlight and flash bulb for artificial photography can be displayed. The selection mode can be displayed.

That is, in the case of a speedlight, the shutter time (below a certain speed), and in the case of a flash bulb, the shutter time or aperture value is displayed on the selected localization device, and the output information, that is, the aperture value or shutter time, is displayed directly on the localization. Note that when using a flash bulb, it is also possible to display input information (shooting distance or guide number), shutter speed and aperture value on the localization layer. By using the circuit shown in FIG. 5, a warning display indicating that proper exposure is not possible can be identified by color, and a warning display for setting an incorrect shutter speed when using a speedlight can also be performed.

This is indicated by the CV symbol in Figure 5. When the shutter speed when using a speedlight is preset to a value far from a certain value, the CV signal is turned on, and the signal is sent to multiple AND circuits via an inverter. An on signal is input to ``, and a red display is thereby displayed on the display section SG to issue a warning. Automatically using the circuit shown in Figure 5. It is also possible to indicate that the focus camera is in focus.

That is, the signal CV is turned on when the object is out of focus and turned off when it is in focus, so that each display color is switched and displayed. As explained above, according to the present invention, the aperture value is calculated based on the preset shutter speed and brightness based on the first selection signal (corresponding to the signal SS in the embodiment) indicating the shutter priority mode. Then, the preset shutter time is stored in the first register (corresponding to registers R4 to R7 in the embodiment), and the calculated aperture value is stored in the second register (corresponding to registers R, to R2 in the embodiment). The shutter speed is calculated based on the preset aperture value and brightness based on the second selection signal (corresponding to the signal SS in the embodiment) indicating the aperture priority mode, and the preset aperture value is stored in the preset aperture value. In a camera that stores the calculated shutter time in the second register and stores the calculated shutter time outside the first register, the preset shutter time is displayed in the shutter priority mode, and the preset shutter time is displayed in the aperture priority mode. The first button is used to display the preset aperture value.
(corresponds to P7 to P4 of the display device SG in the shutter priority mode of the embodiment, and P7 and P6 of the display device SG in the aperture priority mode), which displays the calculated aperture value in the shutter priority mode, and displays the calculated aperture value in the aperture priority mode. - a second display for displaying the calculated shutter time in the shutter priority mode (display device SG in the shutter priority mode of the embodiment);
P2, P, corresponding to P4 to P, of the display device SG in the aperture priority mode) and transmitting the contents stored in the first register to the first display device in response to the first selection signal. transmits the contents stored in the second register to the second display, transmits the contents stored in the second register to the first display in response to the second selection signal, and transmits the contents stored in the second register to the first display; 1
Since it is equipped with a gate circuit (corresponding to the selection circuit SEL in the embodiment) that transmits the contents of the register to the second display, it is possible to capture images displayed on the first or second display with a dual-priority camera. This has the effect that the priority shooting mode can be known by recognizing the information.

Furthermore, in the camera of the present invention, regardless of the priority mode, the shutter speed is stored in the first register and the aperture value is stored in the second register, so in order to control the shutter of the camera, the first register, Aperture control can be performed based on the second register, which simplifies the configuration of the camera. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit configuration diagram showing an embodiment of the display method according to the present invention, in which selection modes and output information are displayed on a localization calendar.

FIG. 2 is a timing chart for explaining the operation of the device shown in FIG. 1, FIGS. 3 and 4 are circuit configuration diagrams showing other embodiments of the display system according to the present invention, and FIG. 5 is a timing chart for explaining the operation of the device shown in FIG. This is a circuit configuration diagram forming a part of the device in another embodiment, and is for displaying in different colors depending on the CV signal. CPU...
...Control device, R, ~R7...Register, MmX
...Multiplexer, DEC ...Decoder, SD ...Segment driver, S
G1, SG2, SG3...Segment display device, DDI, DD2, DD3...Digital driver, SEL1, SEL2, SEL3...Selection circuit, RC...・Ring counter, PC...
...timing pulse generator, SV, AV, TV, B
V... Photography information source, A, ~A7, A,'~A7
'...AND circuit, ORI~OR7...
Rioa circuit. Flourish skin *Zl2 Figure 3 Figure 4 Millet SI9

Claims (1)

[Claims] 1 Based on the first selection signal indicating the shutter priority mode, calculate the aperture value based on the preset shutter time and brightness, store the preset shutter time in the first register, and calculate the calculated aperture value. is stored in the second register, and the shutter speed is calculated based on the aperture value and brightness preset based on the second selection signal indicating the aperture priority mode, and the preset aperture value is stored in the second register. Store and calculate the shutter seconds at the first
In a camera stored in a register, the first display displays the preset shutter speed in shutter priority mode, the preset aperture value in aperture priority mode, and the calculated aperture value in shutter priority mode. a second display for displaying the calculated shutter time in aperture priority mode; and a second display for displaying the calculated shutter time in the aperture priority mode; transmitting the contents stored in the second register to the second display device and transmitting the contents stored in the second register to the first display device in response to the second selection signal; A camera comprising: a gate circuit that transmits the contents of the first register to a second display.