JPS62161025A - Photometric apparatus - Google Patents

Abstract

PURPOSE:To simply discriminate that measurement has been carried out and to make it possible to simply confirm the set value and operation value among a plurality of displayed values, by starting the operation of a photometric means in accordance with a manual operation by a photometry start means. CONSTITUTION:A photometry start means CPU allows the operation of photometric means C1, C2 to start in accordance with the manual operation and a combination of a parameter to be preset and a parameter to be operated is selected by a selection means SW13. An operation means CPU performs predetermined operation from the set value corresponding to a preliminarily selected parameter and a photometric result to calculate the operation value in correspondence to a predetermined parameter and a display means LCD displays both of the set value and the operation value. At this time, the means LCD is controlled by a display control means CPU and a synchronizing driver DV1 so as to blank the display corresponding to the operated parameter for a moment before the operated value is displayed from the start of the operation of the means C1, C2. Therefore, the display in accordance with the operated parameter becomes blank for a moment in accordance with the operation of the means C1, C2.

Description

[Detailed Description of the Invention] The present invention relates to a photographic photometry device that measures the intensity of incident light, and more specifically, to a photographic photometer that measures the intensity of incident light, and more specifically, it is capable of simultaneously displaying multiple displays such as an aperture position display and a shutter speed display. Regarding photometric equipment.

Lost! u11 Conventionally, various photographic light meters are known that are configured to display an aperture value and a shutter speed. This type of exposure meter has two modes: aperture priority mode, which sets the aperture value to a desired value, and calculates the shutter speed that will give the appropriate exposure from the photometry results and the set aperture value; and another mode, which sets the aperture value to the desired value. The camera is configured so that a shutter speed priority mode can be selected in which an aperture value that provides appropriate exposure is calculated based on the photometry result and the set shutter speed. No matter which mode is set, the aperture value and shutter speed are displayed at the same time.

However, in such conventional devices, it is difficult to recognize which of the aperture value and shutter speed is a set value and which is a value calculated based on photometry results. Further, when the same brightness as the previous measurement is measured, it is difficult to discern whether the measurement was actually performed or not.

Akira tries to use iL. Therefore, it is an object of the present invention to easily identify that a measurement has been performed, and also to identify which of the multiple displayed values is the set value and which is the calculated value. An object of the present invention is to provide a photometric device that can be easily recognized.

In order to achieve the above object, the photometry device according to the present invention includes a photometry means, a photometry start means for starting the operation of the photometry means in response to manual sampling, and a photometry start means for starting the operation of the photometry means in response to manual sampling. a calculating means for calculating a calculated value corresponding to the predetermined parameter by performing a predetermined calculation from the set value corresponding to the parameter and the photometry result; a display means for displaying the set value and the calculated value, respectively; A selection means for selecting a combination of a parameter and a calculated parameter, and a display that momentarily blanks the display corresponding to the calculated parameter after the photometry means starts operating and before the calculated value is displayed. The display control means for controlling the display control means is defined as a vf characteristic.

Therefore, according to the present invention, the display corresponding to the parameter to be measured becomes blank momentarily in response to the operation of the photometric means.

(The following is a blank space) χ1 Figure 1 is a Pronk diagram showing the configuration of the present invention. The charging conversion circuit (C1) is configured by a light receiving element, an operational amplifier, and a logarithmic compression diode, and converts an electric signal proportional to the logarithm of the intensity of the light incident on the light receiving element into the next stage integrating circuit ( C2) and the photodetector transmits to the detection circuit (C4). The light trigger circuit (C4) provides an integration start signal to the integration circuit (C2) when light with pulsed light emission is incident on the light receiving element of the uni-photoelectric conversion circuit (C1), and also provides an integration start signal to the integration circuit (C2). computer (CPU
), connect the above pulsed light emission to the input terminal (INTA) of 6
It transmits a signal that light has entered the field. Integration III of the optical trigger detection circuit (C4) to the integration circuit (C2)
The transmission of the start signal is effective only when the setting mode of the light meter in this embodiment is the non-code mode (a mode in which integration is started in response to a likely response from the flashlight emitting device without using a code); Setting modes other than the above are prohibited by a signal from the output terminal (PO2) of the microcomputer (CPU).

The integration circuit (C2) is connected to the detection circuit (
C4), or the above microcomputer (cpu
Based on the signal from the output terminal (POI) of >, the T11 signal corresponding to the incident light from the charging conversion circuit (C1) is integrated for an externally set date time or a preset time. Above output terminal (
The addition of / to the line connecting the integration circuit (C2) and the integration circuit (C2) indicates that there is a plurality of connection lines. Hereinafter, lines marked with / indicate multiple lines. The electrical signal integrated by the integration circuit (C2) is sent to the microcomputer (CPU).
) is subjected to analog-to-digital conversion in the next stage AD conversion circuit (C3) by the signal from the output terminal (PO2>) of the microcomputer (c p u
) is transmitted to the input terminal (pH) of

The AD conversion circuit (C3) may be of various types, such as a double integral method or a successive approximation method, but the details are not directly related to the present invention, so the input terminal (Pll) of the microcomputer (CPU) and the output Terminal (PO2), hello [/'
Since the AD conversion circuit (C3) can support various ADi conversions, a detailed explanation will be omitted. A microcomputer (CPS) has a ROM that stores programs in advance and an R memory that temporarily stores data.
AM, accumulators that perform various calculations, timers that generate signals at regular intervals, various decoders, outputs? iil 'E'-1 input terminal.

Input terminal T of the above microcomputer (c p u )
(RES[':T) receives a reset signal from the reset signal generator (G E 3 ) when the power is turned on, and the microcomputer (CPU) inputs the reset signal to the specified address of the program stored in the ROM. Start execution of the program. The reference pulse generator (GEl) is
Microcomputer (CPU) input terminal (PI)
2) Input the oscillation pulse to the microcomputer (
CPU ) is the reference pulse oscillator (G E 1 )
The program progresses according to the oscillation pulses from the reference pulse oscillator (G E 1 ), and the oscillation pulses from the reference pulse oscillator (G E 1 ) are counted by the internal timer 〇, so that an internal interrupt is generated at approximately fixed intervals. It has become. This interrupt by timer 0 is common in microcombiners currently on the market, so a detailed explanation thereof will be omitted.

Output terminal of the above microcomputer (CPU) (
PO8) outputs Hi 8h No. 13 at the same time as the start of measurement when the setting mode of the exposure meter in this example is corded measurement, operates the synchronization driver (DVI),
Short-circuit the synchro terminal (T1). Further, the output terminal (PO3) is connected to a display driver (DV2). The display driver (DV 2 ) drives the display element (LCD), and has internal RAM corresponding to the lighting segments of the display element (LCD). The blinking oscillator (G E 2 ) supplies blinking pulses to the display driver (D V 2 ), and selects segments in the display element (LCD) that are to be blinked according to the blinking pulses. , which causes the light to blink.

The output terminal of the microcombi controller (CPU) mentioned above (
PO4) is a lighting driver (D
V 3 ) and ! , the illumination driver (D V 3 ) activates the transflective type display element (L
The display lighting member (LEDl) placed on the back side of the CD is turned on. l5OI constant section (SWI) is an IS
The film sensitivity based on the ISO setting section (SWI) is set using an external dial.
It is input from the input terminal (PI5) of PU).

Key matrix 1 (KMI) is from (SW2) to (SW
This is to know the status of the normally open switch up to II), and the output terminal of the microcomputer (CPU) (
PO5) is a normally open switch (PO5) connected to the recall key.
Switches (SW2>, (SW3) other than the recall key (hereinafter referred to as the recall key) (SW6).

(SW4), (SW5), (SW7), (SW8), (
SW9).

It outputs the last signal to strobe C8W 10 ) and (SW 11 ), and the output terminal (PO6) outputs No. 43 to strobe the recall key (SW6). The input terminal (PI3) is the key matrix (KM
I) is a terminal into which signals indicating the states of switches (SW2) to (SWll) are input, and the strobe signals output from the output terminals (PO5) and (PO6) are H1 bi11 signals, According to the program, each switch is strobed in chronological order, and when the strobed switch is ON, the above input terminal (PI3
) is input with the IIigb signal.

The signal input to the input terminal (PI3) is connected to the input terminal of the ORD (OR1'), and the output of the ORD (OR1) is connected to the input terminal (INTB) of the microcomputer (CPU). )It is connected to the. When the program of the microcomputer (c p u ) is in the t(A L T state), if the output terminals (PO5) and (PO6) are outputting the Iligb signal, the signal from the switch (SW2) to (SWII ), the above input terminal ((NT
The 1-1iHb signal is input to B), and the interrupt signal input to the input terminal T-(INTB) causes the microcomputer (cpu) to start a predetermined program from the HALT state. jump to address and resume program execution. (SW2) is a normally open switch (hereinafter referred to as the measurement button) connected to the measurement button, and by turning it on, it starts a series of measurements according to the setting mode, or the measurement circuit (C11, (
C2), (C3).

Is it possible to measure (C4)? 1 (7 run light standby state for non-code measurement).

(SW3) is a normally open switch connected to the 77 push key (hereinafter referred to as the up key), and increases the TIME (shutter speed) or FN value (aperture value) set in the data select switch (SWI3). It is something that makes you

(SW4) is a normally open switch (hereinafter referred to as f, t, and grankey) connected to one gran key, and the TIM set to the data select switch (SWI3) is
This reduces the value of E or FN. (SW5)
is a normally open switch (hereinafter referred to as the memory key) connected to the memory key, and when turned on, the measured value data is stored in the specified RAM 1:1 in the micro combinator (CPU). , memorize the measured value data.

(SW6) is a recall key, and the display element (L
CD)? When the Y light is on, the above display element (LCD)? )￥ Lights up the display contents in front of the light.

Further, while the display element (LCD) is lit and the recall key (SWG) is turned on, the data stored by the memory key (SW5) is transferred to the display element T.
- Perform the operation to display on the (LCD).

(SW7) is a normally open switch connected to the memory clear key (hereinafter referred to as the memory clear key),
When turned ON, the data stored by the memory key (SW5) is erased. (SW8)
is a normally open switch (hereinafter referred to as the II key) connected to the ■1 key (calculation key for highlight base exposure), and (SW9) is the S key (calculation key for shadow/n standard exposure). ) (hereinafter referred to as the S key), and (SWIO) is the normally open switch connected to the I'IX key (calculation key for fixing measured values) (hereinafter referred to as the FIX key). It is.

When each switch of the 11 key (SW8), the S key (SW9), and the FIX key (SWIO) is turned on, the exposure value preprogrammed corresponding to those switches is executed, and the results are displayed on the display element ( LCD)
to be displayed. (SWII) is MULTI R
ESSE"1l-1-: This is a normally open switch (hereinafter referred to as the MULTI RESET key) connected and is a key for starting a new measurement when performing integrated measurement.

The key matrix (KM2) is (SWI2).

This is a key matrix circuit for knowing the status of each static switch (SWI 3) and (SWI 4).
O7) outputs strobe buoy No. 5 in chronological order, and switches (SW 12 ), (SW 13 ), (SW
14), the key matrix (KM2) is connected to the input terminal (P) of the microcomputer (CPU).
r4), switches (SW 12 ), (SW 13
).

(SW14) signal is transmitted.

(SW12) is a switch that is selectively set to one of the three positions AM[3I, C0RD, NON, and C (hereinafter referred to as the setting mode switch), and when AMB I is selected, , the exposure meter of the present invention measures ambient light, and when C0RD is selected, it outputs a signal to the synchro driver (DVI) to cause the flash device connected to the cord to emit light, and also causes the flash device to emit light. If measurement is performed, and if NON or C is selected, the program is programmed to start cordless 7-lash likelihood measurement by generating a flash likelihood.

(SW13) is a switch that is selectively set to one of two positions, TIME and FN (hereinafter referred to as TIM
E/F No switch) and TIME
When is selected, the measurement result is a shutter speed priority measurement in which the FN value is calculated and displayed as the answer.
By operating the up key (SW3) or the down key (SW4), the set value of the shutter speed displayed on the display element (LCD) can be changed. Also, marks around the TIME mark in the display element (LCD) are lit. The above TIM
E/'F N, when the switch is selected to FN, the above amplifier key (SW3) or down key (SW
By the operation 4), the set values of FN and values displayed on the display element (LCD) can be changed. Also, by executing the measurement, the set 1'
A so-called aperture priority measurement is performed in which the answer to satisfying the value R is calculated and displayed. At this time, the : marks (b) around the FN and J marks (r) in the display element (LCD) are lit.

(SW14) is a switch that is selectively set to one of two positions, S TNGLE and MULT I (hereinafter, S
When 5INOLE is selected, a single measurement is performed, and when MULTT is selected, an integrated measurement or MtI number of times is performed. Perform calculation measurements.

FIG. 2 is a diagram showing the appearance of the light meter of the present invention. The light receiving window (M A ) is provided at the upper part of the main body.

In Figure 2, the S INGLE/MtJLTI switch (SW14) and the MULTI RESET key (S
W 11 )(f) The rll relationship is as shown in the side view of Pt52. , when turning on the MULTI RESET key (SWII), use the above S I NGL
This is only when the E/MULTI switch (SW14) is selected to the MULTI position, and in the light meter of the present invention, the S INGLE/MULTI switch (SW1
4) and MULTI R[ESET key (SWII) are configured with one switch. In other words, S INGL
E/MULT I/MULTI of SW14
A MULTIRESET position is provided on the outside of the side, and by pressing the switch further from the MUL" 8 position, the operation when the MULTI RESET key is turned on is executed. Also, the above MULTIRESET
The switch that has been pressed down to the T position is planted so that when the finger is released, the switch will naturally return to the MULTI position due to the restoring force of the spring material.

FIG. 3 is a diagram showing a state in which all segments t of a display element (LCD) of a light meter according to the present invention are lit. FIG. 4 shows a display driver (DV3) for driving the display element (LCD) and the microcomputer (DV3).
FIG. 2 is a block diagram showing a display-related part of the CPU.

The display driver (DV3) is shown as a state-ink type that outputs an output corresponding to each segment of the display element (LCD) individually, but it is of the Guinaminok type, which is a drive method using a common signal. There may be.

The microcomputer (c p u ) has RAMs I′ (RAMI) to (RAM16) for transmitting display data to the display driver (DV3).
TI is intended. (RAM1.2) stores data for outputting a lighting signal to the address (A1) for lighting up the ISO mark (to) of the display driver (DV3). (RAM13) is a RAM for outputting a lighting, gf, or off signal to the address (A2) corresponding to the TIME mark (c) of the display driver (DV3). (RAM14) is a RAM for outputting a lighting or α-off signal to the address (A3) corresponding to FN and mark (LE) of the display driver (DV3). (RAMI) is an S corresponding to the ISO value set by the above ISO setting section (SWI).
Vo is stored and connected to the ISO decoder (DCI), and the above IS○ debug (DCI) is
The data of MI) is decoded into a code that can be lit by the display element (LCD), and the data of the display driver (D
V 3 ) at the ISO display address (A4). The above ISO display address (A4) is the above display element (L
It is connected to the ISO display of CD), and the above (RA
The value corresponding to the SVo data stored in MI) is displayed.

(RAM2) stores the TV value corresponding to the shutter speed set by the up key (SW3) or the gran key (SW4) or the shutter speed derived by arithmetic processing, and the TIME decoder (DC2) connected to the above TIME defugu (DC2
) transfers the data of the above (RAM2) to the display element (LC).
D) is decoded into a code that can be turned on and stored in the TIME display address (A5) of the display driver (DV3). The TIMEi indication address (A5) of the display driver (DV3) is the TI of the display element (LCD).
TV connected to ME display (d) and stored in the above (RAM2). Display the lower value corresponding to the data.

TIME display (
"S" in d) indicates seconds, and the shutter speed is from 1 second to 5 seconds.
It is decoded by the above TIME decoder (DC2) so that it lights up when the time is up to 9 seconds, and the TIME display (D) is also displayed.
"..." indicates the minute, and the TIME decoder (D
C2).

(RAM3) contains the FN and value set by the up key (SW3) or the grand key (SW4), or the FN derived by arithmetic processing, and the AV corresponding to the value.
, the value is stored, and is connected to the FN and value decoder (DC3), and the FN and value decoder (DC3) are connected to the above (
The data in the RAM 3) is decoded into a code that can be lit by the display element (LCD), and the data is sent to the display driver (DV).
3) is stored in the FN and place display address (86). The F No. 0 display address (A6) of the display driver (DV3) is connected to the FN and display of the display element 7-(LCD), and the AV stored in the (RAM3),
Display the value corresponding to the data. (RAM4) is S
The MULTI value indicating the cumulative number of measurements or the number of multiple exposures derived by calculation processing when the I NGLE/MULT I switch (SWI4) is selected is stored.
The GV, MULT I NO7"=+-g (DC4) is connected via R3), and the GV, MULT I NO7 decoder (DC4) converts the data of the above (RAM4) into the display element T' (LCD). Decode it into a code that can be lit with
Store in T I No display address.

GV of the above display driver (DV3).

The MOLT I No display address (A7) is connected to the GV and MULT I No display of the display element (LCD) above, and the MULT I No display address (A7) is connected to the MULT I No display address (A7) of the above display element (LCD).
Display the value corresponding to the I No data.

Also, a part of the MULTI No data in the RAM4 is stored in the display driver (DV) connected to the MULTI mark of the display element (LCD).
3) is transmitted to the MULT I mark address (A8), and the MULT I mark address of the above display driver (DV3) is transmitted.
Turn the mark on or off.

The above (RAM4) MULT INONo data, O
If data other than FF is stored, the terminal (T2)
It outputs a LOW signal, controls the address (ANDI), and cuts the output from the GV and data stored (RAM5).

Above S INGLE/MULTI switch (SWI4)
When 5INOLE is selected, MULTINO
The data becomes OFF, and all data input from the above (RAM4) to the above OR date (OR3) becomes a LOW signal, while the above terminal (T2) outputs a HI G 11 signal, and the above GV.

The MULTINO decoder (DC4) has the above (RAM
5) The data from
It is input via ORDATE (OR3). At this time, the display driver (DV3) MULT I, Lamark address (A8) is
)'s MULTIj7 mark (su)? ) A single light signal is input.

The above G■, the GV stored in the above (RAM5) input to the MULTINO DE: +-r- (DC4).

The data is obtained from the above GV, MULT r No decoder (
D C4) is decoded and displayed on the display element (L
The GV and MULT I No display of CD) is shown above (RAM
5) It lights up in response to the GVo data stored in . At the same time, the GV of the above display driver (DV3)
1. Lights up or flashes a signal at the mark address. II- is supplied, and a + mark or one mark (g) lighting signal is supplied to the +- mark address (A10).

The above (RAMI), (RAM2), (RAM3).

When the data OF FIT is stored in (RAM4) and (RAM5), an inverted signal is transmitted from each RAM to the corresponding decoder, and each decoder transmits the 4y off signal to the display address for the decoder. It is something. (RAM6) is TIMIE/FN, switch (
The setting 1n information of SW13) is stored, and is connected to the nimark address of the display driver (DV3) that lights up the nimark (b) of the display element (LCD).

TIME/FN above.

When the switch (SW13) selects TIME, the mark (B) around the TIME mark (C) on the display element (LCD) lights up, and when FN is selected, the FN , the : mark (b) around the mark (l) lights up.

(RAM7) is the I key (SW8), the S key (sw9).
), S I-I F data determined when each of the FIX keys (SWIO) is turned on is stored, and the S HF data of the above (RAM7) is It is decoded by the II F decoder (DC5) and the S of the above display driver (DV3)
It is stored in the S Ll r' mark address (A12) connected to the HF mark, and the display element (L CD )
Light up either the S mark (U), I-1 mark (N), or F mark (Ke) in accordance with the SHF data.

(RAM8) stores 7 lags of OUF and UDF that are generated at the moment when the calculated data exceeds the display range of the exposure meter of the present invention, and the 0V of the display element (LCD) is stored.
Er? OVCRUNDERV-Q address (A13) connected to RI(T), UNDERV-RI(N)
, the 0Vcr mark (T) flashing signal or the under mark (N) flashing signal can be turned on. (RAM9) stores the state of the setting mode switch (SW12),
When L note (SW12) selects AMI3 I, the AM13 I mark (Y) of the above display element (LCD)
The above display decoder (D V 3
) of A M B I , CORD , N ON , C
A signal is supplied to mark address (A14), and when C0RD is selected, a signal that lights up the COR, D mark (power) is supplied to (A14). Further, when NON, C is selected, a signal for lighting or blinking the NON, C mark (wa) is supplied to (A14).

(RAM1G) stores a signal for blinking memory mark 1 or memory mark 2 of the display element (LCD), and (RAMIO) stores MN indicating the number of memorized measurement values. .

The above (RAMIO) MN data is MN Defu-Goo (D
C6) and when MN is 0, memory marks 1 and 21? When MN is 1, the memory mark 21 lights up, and when MN is 2, the memory marks 1 and 2 light up. Supply to memory marks 1 and 2 and address (A15). Above (RA
M+13) is the memory mark 1° 2.7 Tre 15) l: Supply C
Ru.

(RAM15) stores lighting No. 43 by executing the display program routine of the program, and the analog index address (A16) of the display decoder (DV3) is set to the connected display element - (LC).
Light up the analog indicator D).

(RAMII) i, t, above, S, t(, F mark ri(
If y), (+), and (ne) are not stalled, the deviation from the stored value based on the last measured value is stored, and S.

When the H, F marks (U), (S), and (N) are lit brightly, the deviation from the last measured value and the stored value based on the calculated exposure value is stored. The analog decoder (DC7) decodes the data stored in the above (RAM1+) so that the reference value corresponds to the dot above 0 of the analog index of the display element (LCD), and displays the above data. Transmit to the analog dot address (A17) of the display driver (DV3). Above analog decoder (DC?), analog dot address (A17
), the details of the analog indicators in the display element (LCD) will be omitted since they are not directly related to the present invention.

Also, when a blinking signal is input to each address The above display element (LC[)
) to the above display driver (D V 3
) has. The explanation here is based on the microcomputer (Cr'U) and display driver (DV3).
) are connected in parallel, but each address is connected in parallel from the microcomputer (CPU) to the display driver (
A method may also be considered in which data is transferred to each address of the DV3). In addition, although the display here has been explained as being performed by a decoder etc. configured in the microcomputer (cPU), it is also possible to perform the decoding by using a program stored in the ROM. be.

Next, the movement of exposure J in this embodiment will be explained according to the 70-chart.

When power is applied to each circuit in the block diagram shown in Figure 1,
From the reset generator (GE3), micro = + micro x -
Data (CPU) (') input 1? -(RESET)
l: A reset signal is supplied, and the microcomputer (CPU) starts executing the program from a predetermined ROM address. FIG. 5 shows the input terminal T (RESET
) is a flowchart showing a program that is executed when a reset signal is input. In step 1, the stack pointer in (c p u ) is set to a predetermined value, and in step 7, each output terminal in (CPU) is set to its initial state! ! ! Set it so that it is 1 time. In step 3,
The ISO value set in the s○ setting section (SWI) is read from the input ffi T- (PI5) using a code, and the data is stored in (RAM1). - In step 1, a value corresponding to the predetermined initial shunter speed value is stored in the RAM that stores the value T V U.

Similarly, in step 5, a value corresponding to the predetermined initial FN value is stored in the RAM that stores the value AV. In step 6, R
Add A M + 0 to 7 in step 7.

In step 8, RAM 120, which stores G Votca that instructs the increase or decrease of the number of units, is RAM 1: 0, which stores MN indicating the number stored in memory.
In step 9, 1 is stored in each RAM that stores RN indicating the memory number recalled by the recall key (S W G ).

In step 10, reset timer 1 and timer 2, which are used as counters to create a certain amount of time.
／Toshi, and then start measuring for a certain period of time. In step 11, press the H key (SW8) to perform the above exposure calculation.
, S key (SW 9 ), or FIX key (SWlo) is turned on to reset the 7 lag of S[-1F to 0.

In step 12, when the value derived by the calculation after measurement is outside the display range, mark the 0Ver mark (T) or the uncr mark (N). , ξ 7 to light
Set lag OUI' and UDF to 0. In step 13, TIMIE/['N is added to the above (RAMG).

Store the setting status of the switch (SWI3) and proceed to step 1.
In step 4, the setting state of the mode switch (SWI2) is stored in the i♀ setting (RAM 9 ). Stenbu 15 is
The above S I NGLE/MULT I switch (SWI
4) Storing the setting state in (RAM 20) is executed. In step 1G, the above S I NGLE/MU
If the LT I switch (SWI4) is set to 5INGLE, step 17 \Jump and MULT
If I is selected, in steps 18 and 19,
The above display element (1-CD) G V + M U
(RAM 4), (RAM
5) Set. If the TIME/FN switch (SWI3) has selected FN in step 17, and the setting mode switch (SWI2) has selected C0RD, NON, or C, jump to step 22.23. , GV of the display element-(LCD),
(['?AM4) and (RAM5) are set so that the data of GV is displayed on the MOLTINO display. Otherwise, the process jumps to step 20.21, and (RAM4)t(RAM5) are set so that the GV and MOLT I No displays on the display element (LCD) are blank. Thereafter, the process proceeds to step 24, the display program, where the above (RAMI) is executed.

(RAM2), (RAM3), (RAM6), (RAM
7).

(RAM8), (RAM9), (RAMI G).

(RAM 10), (RAM 15), (RAM
11)t(RAMI 2), (RAMI 3), (R
Data to be stored in each AMI 4) is input. As a result, a display is made on the display element (LCD) according to each switch.

In step 25, the strobe signals from (SW2) to (SWII) are set as T11bit.

From this point on, when any of the keys from (SW2) to (SWll) is turned on, the input terminal (INTB) of the microcomputer (c p u ) is
A signal will be input. In the step 7 block 26, an interrupt operation is executed when a HigI+ signal is input to the input terminal (INTB), and an interrupt operation is executed by the microcomputer (
The timer 〇 in the CPU ) is activated by the reference pulse oscillator (
The oscillation pulses from G E 1 ) are counted, and an interrupt operation is enabled to be executed when an overflow occurs. In step 27, the microcomputer (CPU)
).

This suspension is canceled when the two types of interrupts permitted in step 26 occur.

i [Figure G-1, Figure 6-2, Figure 6-3, Figure 6-4U:
! J, No. 6-5121 is the above-mentioned microcombinator (
High voltage 11 is applied to the input terminal (INTI3) of
This shows a program that is executed as an interrupt when a signal is input. In step 30, the input terminal (INTA) of the microcomputer (CPU).

(INTI3) All interrupts that occur due to input of the Hi-BI11 signal and interrupts that occur due to the internal timer 〇 exceeding 70- are prohibited. In step 31, it is determined via the key matrix 1 (KMI) whether the measurement button (SW2) has been turned on. The measurement button above (
If SW2) is OFF, jump to step A, and
If the answer is N, execute step 32. In step 32, select the ``uni-configuration mode switch'' (SWI 2).
, TIME/FN, switch (SWI 3), S I
Since the output data differs depending on the combination of the states of each switch of the N0LE/MULTI switch (SWI4), the setting state of each switch is detected and the display on the display element (LCD) corresponding to the calculated data is blanked. So that (r?'A M 2 ), (RAM :
'! ).

Blank data is stored in (RAM4) and (RAM5).

Table 1 shows the above setting mode switch (SWI2).

TI ME/FN, switch (SWI3).

SI NGLE/MULT I switch (SWI4)
Calculated data based on the combination of the states of each switch,
This is a table showing the address of the display driver (DV3) and the display contents of the calculated data of the display element (LCD).

To explain with an example in step 32, the above S I N
GLE/MULT I switch, 2chi (SWI4) is S I
NGLIE, T I ME/I'N, switch (SW
When I3) is set to TIME and the setting mode switch (SWI2) is set to C0RD, the calculated data is AV, and by storing the data OFF I in (RAM3), the above display element FN in (LCD)
, the display will be blank.

Mata, the above s I NGLE/MUL'rI Xychi (SW14) is S I N0LE, TI ME/FN
o sui.

switch (SW13) is FN, setting mode switch (SW1)
2) are each set in C0RD, the data to be pruned is GV, and the OFF is stored in the above (RAM4).
Data H is stored, and data is set in the RAM 5 so that the GV mark of the UNI display element 7-(LCD) lights up and the 10 mark, 0 GV, and MULTINO display become blank. As a result, the GV of the display element (LCD),
The MOLT I NO3 indicator (J), MtJLTl, t7 mark (S), and 10-mark (G) are lit, and only the GV mark (N) is lit.

In addition, the S I NGLE/MOLT I switch (SW
14) is calculated when MtJLT I, TI ME/FN, switch + (Si1113) 75' TI ME, setting mode 1' The data is MUL
TINO and AV. In this case, the above (RAM3)
0 is stored in the RAM (FLASHRAM) which stores OF F 11 and the measured data of 7 laser beams. The details of the measurement method will be omitted since it is not directly related to the present invention. If the setting mode switch (SW12) has selected C0RD in step 33, step 351 is performed and the output terminal (P
O8) and I (igl+), and connect the synchronizer driver (
DVI) is driven and the synchro terminal (T1) is short-circuited, and in step 36, seven laser beams including stationary light are measured in accordance with the shutter speed already set from the outside. After completing this measurement, a predetermined steady-state measurement between H and Ir is carried out, and the above (A
The measured value of the constant light is stored in MBIRAM), and the 7-rate measurement value including the above-mentioned stationary light and the measured value of the constant light stored in the above-mentioned (AMBIRAM) are calculated. Calculate the value of only the light and store the result in (FLASHRAM). The above-mentioned method of measurement and calculation of the value of only the flash light have already been discussed in detail in JP-A No. 55-10569, so a detailed explanation will be omitted here. In step 33 above, the setting mode switch is set to NON,
If it is set to C, the process advances to step 737. In step 37, a signal for blinking the NON and C marks (wa) is stored in the above (n AM 9 ) together with the setting data of the setting mode switch (SW12). As a result, the display element (LCD)
), the exposure meter of this example is in a state where it is possible to measure the emission of flash light (hereinafter referred to as the standby state). shows. In the steno 158, H is applied to the output terminals (PO5) and (PO(1)).
Output i-bi 11 isi number. In step 38, the timer 1 for measuring the time in the light standby state is reset and measurement of this time is started. The input terminal (IN) of the microcomputer (CPU) is connected to the stainless steel 139.
Interrupt operations caused by the input of IiH1+A3 to (TA) and (INTB), and interrupt operations caused by the overflow of the internal timer O; are permitted. In step 40, the time in the light standby state is measured. While repeating this step 40, when the HigMff signal is input to the input terminal (INTA), that is, when the light detection circuit (C4) detects that the flash light is emitted, the process proceeds to step 36. Then, the series of measurement operations described above when set to CORD is performed. At step 40, in the waiting state, (s
When any of the keys from W2) to (SWII) is turned on, a Higl+ signal is input to the input terminal (INTI3), and the program skips to step 30. Also, if the internal timer 〇 overflows during the waiting state of step io, the program jumps to the address specified by the interrupt operation and executes the program, but at that time timer 1 is incremented by 1 count. I'll come back.

As a result, when the standby state continues for a certain period of time, the process proceeds to step 41, and the input terminal (rNTAIt3 rises (TNTB
), and in step 42, the above (R
AM9). In addition, the data to be calculated is determined as explained in step 32, and if the data is of rank 7, that is, if no measurement has been performed, the display element corresponding to the data is (
The data in the LCD (LCD) should not display 0,
Data to be calculated above 1: Lf response L r knee
RAM l:a payment 7J. When NON and Cv-re (wa) change from blinking to lighting, it can be recognized that the hold-back state has been released. After step t2, the program jumps to step E. When the measurement according to the setting mode of the setting mode switch (SWI2) is completed, the program advances to step 43, and the above TIME/FN is set.

The switch (SWI3) selects T I ME, and
r NGLE/MOLT 1 SWI + (SWI 4)
*If MtJ L, T 1 is selected, proceed to step 44 and perform the next calculation.

2 DATA1: 2 DATA1 + 2 DA
M[lIItAM (1) DATA
l = log2 2 DΔT^'
-(2)-〇ΔT81 DATA1
---(2) '[IAT^2
- To OAT 82 DFLASIIR
AN-(3)2 -2 +2 DATA2 = Iog22DAT^2--(4)W
IIATA 2 = I)ATA 2
-□ (4)' D A T A 1 shown in equation (1) is the integrated value of steady likelihood measurement values, and D A T A 2 in equation (3) is the measurement of only flash light. Shows the cumulative value of the values.

Before performing integrated measurement, O is input to DATA1 and DATA2, and in the calculation of equations (1) and (3), if the exponent of 2 is 0 in the term of two powers, that case is t++ A special calculation is performed in which that term is definitely treated as 0. Further, in equations (2) and (4), special calculations are performed such that when the term of the power of 2 on the right side of each equation is 0, the value on the left side becomes O. In the next step 54, the number of integrations MULTINo is incremented by one count. If you do not jump to step 44 above, go to DT^1=DAMBIRAM-(5)DΔTΔ2
=OFIΔ5llR8M--(6) Execute the 1n conversion. DAMB I in formula (1) (3) (5) (G)
Indicates the data stored in RAMI 3IR, lit, and DF I ASHRAM is FLASI.
It shows data stored in IRAM.

The display data in the diagram is WD8A1 and WDAT
A2 is shown, and the display data address is WDA.
This shows the RAM in which the data of T A 1 and W D A T A 2 are to be stored. After the above calculations are completed, exposure calculations are performed in step 4G, and the following
t7 The data calculated in step 7 is ``uni display element completed (L
CD). Between step 32 and step 47, the display corresponding to the data to be calculated becomes blank, and it can be seen from the display what has been calculated and displayed through measurement. In step 48, it is determined whether the setting mode switch (SWI2) is selected as NON or C. If NON or C is selected, the process returns to step 37 and the setting mode is changed to NON again. , C is repeated, and a waiting state is reached.

If NON or C is not selected in step 48 above, it is confirmed that the measurement button (SW2) is turned off in step 49, and then the time until the entire display becomes blank is measured in step 50. The timer 2 is reset and a new measurement of the time until all the above displays become blank is started. In the step/pu 51, the output terminal (P
O5).

(POG) wo Higl+l: L, and the above (SW
2) to (SWll) are turned on, the (i) Hb times signal is input to the input terminal (TNTr3). In step 52, the input terminal (IN'
Interrupt at “B), internal timer 〇 over 70-
In step 53, the program is temporarily stopped.

If it is determined that the measurement button (SW2) is not turned on in step 31 of FIG. 6-1, the process goes to step Δ of FIG.
) is ON or not, check the above key matrix 1 (K
By supplying MI) with C7-Pui No. 3? I decide. ] 2) The above amplifier (SW3) is ON (2) No input step 61
E/FN, switch (SW13) is TIME, FN
u Determine which one is selected, tq, and T I M E
If ie has been selected, the process advances to step 64. In step 64, the TVMAX value determined from the display range of the shutter speed of the exposure meter of this embodiment is compared with the value Tvo corresponding to the set shutter speed, and if they are equal, no operation is performed and the step is performed. Noyamp to 72. In step 64, if the TVU value and the TVMAX value are not equal, then the TV value always indicates a value smaller than the TVMAX value. At this time, Stella 7' 651. : Advance h, TV, count in 1 value 911/in. In the exposure meter of this embodiment, this means that the shutter speed is ITV shifted to the high speed side.

Here, TV indicates a base-2 logarithmic value of the reciprocal of the shutter speed. The process then proceeds to step 72. T IME/FN in step 61 above.

If the switch (SW13) has selected FN, in step 62, the AVMAX value determined from the display range of the aperture value of the exposure meter of this embodiment and the value AV0 corresponding to the set FN value are set. If they are equal, the process jumps to step 72 without performing any operation. In step 62, if the AVo value and the AVMAX value are not equal, then the AV value always indicates a value smaller than the AVMAX value.

At this time, proceed to step 63 and proceed to step 8■. Increment the value by 1 count. In the light meter in this embodiment, FN means that the value is shifted in the direction of stopping down by one step. Thereafter, the process proceeds to step 72. In step 72, exposure calculation is performed on the changed TV, value or AV, value, and in step 73, a display corresponding to the calculated data or the changed Tvo value or AVu value is performed. Step 7
4, ``1 Up key (SW3), Grand key (SW
After confirming that 4) is turned off, proceed to step E.
That is, the process jumps to step 50 described above, executes the post-processing operation, and then pauses. If the amplifier key (SW3) is not turned on in step 60 above, step 6
G, and in the same way as the 10 constant in step 60, it is determined by 1' whether or not the grand key (SW4) is ON. If the grand key (SW4) is ON, step 67 (secondary advance, T I ME/FN
, the switch ('5W13) is T r M! Key matrix 2 (KM2) indicates which is selected, E or FNo.
), and if TIME is selected, Stella 170 jumps. At step 70, the shutter j! of the exposure meter of this embodiment is activated. The TV MIN value determined from the one-time display range is compared with the set TV value, and if they are equal, no action is taken and the process returns to step 72. In step 70 above, the TV value and T V M T N
If the values are not equal, then the TV value is always T V M
This value is greater than the I N value, and in step 71 the TV value is decremented by one count. In the exposure meter of this embodiment, this means that the shutter speed is ITV shifted in the direction of slowing down. Thereafter, the process proceeds to step 72.

At the above station and proa, T[4E/FN, switch (SW
13) If FN, J is selected, step 6
Proceed to step 8 to find the FN of the exposure meter of this example.

The AVMrN value determined from the value display range is compared with the set AV value, and if they are equal, the process proceeds to step 72.

If they are not equal, the AV value always indicates a value greater than the AVMTN value, and is decremented by one count in step 69. In the exposure meter of this embodiment, this means that the FN value is shifted by one step to the 11 emission side. Thereafter, the process proceeds to step 72, where the operations described from step 72 onwards are executed, and a temporary stop state is achieved.

If the down q- (SW4) is not turned on in step 66, the process goes to step B in FIG. 6-3. Step B proceeds to step 80 and presses the memory key (SW5).
The determination of whether tq is turned on or not is executed via key matrix 1 (KM 1 ). If the memory key (SW5) is turned on, step 8
Noyamp to 1. In step 81, it is determined whether the value of MN indicating the number of memory keys is 2, and MN
If is 2, that is, if two pieces of data have already been stored in memory, the process goes to step 82. In step 82, as explained in step 32, the display element (LCD) corresponding to the data to be calculated is
A value corresponding to the E display is stored in the display RAM corresponding to the data to be calculated so that the display within the display becomes the E display. Thereafter, the process proceeds to step 92. Step 8 above
If it is 1 and MN is not 2, the process goes to step 83 and MN is incremented by 1 count. Next, in step 84, it is determined whether MN is 2, and M
If N is 2, proceed to step 85. At this time, in order to store two memories when one memory has already been stored, press the memory key (SW5).
) is turned ON. In step 85, the values of DATA1 and DATA2 obtained by measurement are set to 2.
The second memory is stored in the RAM where it should be stored. Step 86 indicates that the second memory has been executed. In order to light up the memory timer 22, the MN data is stored in (RAMIO) for display.

As a result, the memory mark (shi) in the display element (LCD) lights up. At this time, since the first memory has already been executed, both the memory timer 21 (evening) and the memory timer 22 (shi) are lit at this time. In the above step 84, if MN is not 2, that is, if the memory key (SW5) is turned on without any memorization, the process proceeds to step 87, and the DATA1 obtained by the measurement is and D
The value of ATA2 is set to R where the first memory should be stored.
A M +: Store. Step 88 stores the data of MN in RAMIO in order to light up the memory marker 21 indicating that the first memory has been executed. Steps 86 and [/'88 are step 8
9. Proceed to step 90, perform exposure calculation corresponding to the final measured value, and display the value calculated in step 91 on the display element (L C
D) and press the memory key (SW) in step 92.
5) After confirming that the recall key (SWG) is OFF, jump to step E, execute the above-mentioned post-processing operation, and then stop. If the memory key (SW5) is not turned on in step 80 above,
Jump to step 93, and is the recall key (SWC) turned on? The lI constant is the key matrix 1 above.
(KMI), and if it is turned on, jumps 7 to step 94, and if it is not turned on, jumps to step C. In step 94, the output terminal (P04 ) by outputting the IIigb signal to turn on the display lighting member (LEDI) installed on the back surface of the display element (LCD).

In step 95, the I4 key (SW8), the S key (SW
9) Flag S If indicating whether exposure calculation is being executed by turning on the FIX key (SWIO)
Perform tq determination to determine whether F is 0, and if it is not O, that is, the above (S W 8 ), (S W 9 ), (S W
10)), in order to cancel this operation, in step 96, S
t[F is set to O, and in step 97 the display element (LCD
), 11 marks (ne), S marks (u), F marks (
In order to turn off the light in the RAM?
Store the data of. As a result, the above (SW8), (
Exposure calculation by SW9) and (SWI O) is canceled,
After skipping to eight steps, exposure calculation for the final measured value and its display are performed.

If the S I-I F is O in step 95, that is, if the exposure calculation using (SW8), (SW9), and (SWI O) is not performed, in step 98, the display element -7-(LCD) Determine whether all segments of are off. The exposure meter of this example has a range from (SW2) to (
SWII) for a certain period of time, specifically,
For example, if there is no exposure for 4 minutes, the display will automatically turn off.
The activation of ll is completed by turning on the recall key (sw6). If all the displays are off in step 98, the value is 1! When q has been determined, the process jumps to step 8 to perform exposure calculation of the final measured value, display the calculated data and setting data, and activate the light meter of this embodiment.

Full display in step 98? If it is not the l'f lamp state, the process jumps to step 991 and determines whether the display corresponding to the calculated data as shown in Table 1 is E or not. This is to cancel the 112 display that is executed when the memory key (SW5) is turned on in a state where two memories have already been set. If the display is E in step 99, the step knob 89 is moved to perform exposure calculation and V display of the final measured value. What if E is not displayed in step 99? If it is determined, in step 100, the memory to be recalled is the first memory or the second memory? ll determine. When RN is 1, the first memory is called, and when RN is 2, the second memory is called. In step 100, if RN is 2, the process returns to step 101 to set RN to 1. Due to this and the operation in step +04, memory recall by turning on the recall key (SWG) is carried out alternately between the first memory and the second memory.

In step 02, since the memory to be called is the second memory, the memory mark 2 on the display should be blinked (by storing the memory mark a in the RAMI (i), 2 (shi) starts blinking. Step 103: At step 107, exposure calculation is performed on the data stored in the memory of the second port, and the calculated data is displayed at step 1 ()8. .

If no data is stored in the 28th memory, the 28th memory is
” memory or the RAM in which the second memory is stored
0 data is stored in the memory, and the display at this time is 0.+1=F Extruded 1st or 2nd [1] indicates that no data is stored in the memory. However, I have come to understand -C. When the battery is inserted, R stores the 1st and 11th memories and the 2nd and 11th memories.
0 is stored in AM. Step 109 is repeated until the recall key (SWG) is turned OFF in step 109, and then the program moves to the dog step. Recalling the memory of the exposure meter in this example (
! This function is valid while the recall key (SWG) is ONL, and when it is turned OFF, the display corresponds to the final measured value.

In step 110, data for lighting up the memory mark corresponding to the recalled memory that has started blinking is stored in RAMIG, and in step 89
．． Exposure calculation is performed on the final measured value in step 90, and displayed in step 91.

If RN is not 2 in step 100, that is, if the data to be recalled is memory 1, 1], skip step 1 of 104, set II N to 2, and set 11 to memory 1, 11 to be recalled in step 105. A3 for blinking the memory mark 1 (evening) of the corresponding display element (LCD) is stored in the RAM 16.

As a result, the memorizer 21 (evening) becomes e″, (
Start extinction. Then step 1 (I G , 1
0? Then, exposure calculation is performed on the data stored in the first memory, and the ejected data is displayed in step 108. The subsequent operations are the same as those from step 109 described above.

Step 93t' above, recall key (SWG) is ON
If not, proceed to step C (see Figure 6-4).In step 120, press the memory clear key (SW
7) is turned on or not is determined via the key matrix 1 (KMl).

If the memory clear key (SW7) is ON, the process jumps to step 121, and if the memory clear key (SW7) is not ON, the process jumps to step 129.

Step 12! Then, Ml indicates the number stored in memory.
Then, in step 122, 1@mouth memory and 2
R A Ml to store the th memory:, 0 data is stored. In step 123, S II F()
, and in step 124, a two-legged display element (LC
D) Memory mark 21 (ri) and memory mark 2
(1) To store the MN data in (RAMIO) as No. 1, and to display the S II P marks (U), (S), (N). As No. 13, store your S Ll F data in (RAM?). By turning on the memory clear key (SW key) mentioned above,
key (SW73), S key (SW9), FIX key (S
The exposure calculation by W10) is canceled. Step 125
, 12G, exposure calculation is performed using the data of the final measurement value, and is displayed in step 127. In step 128, after confirming that the memory clear key (SW7) is turned off, the process jumps to step E, and after performing the post-processing operation, the process is temporarily stopped.

In steps 129, 130 and 131, if key (S W
8), S key (SW9), F I ) l-(swt
Determine whether each key in o) is turned on,
+ (If the key (SWa) is ON, step 132
, 811 F is set to 1, and in step 133 (F
? ■! in the display element (LCD) by storing SHF data in AM7)! The mark (ne) lights up. S key (
If SW9) is ON, S II is turned on in step 134.
F is set to 2, and by storing the SHF data in (RAM?) in step 135, the display element - (LC
D) The S mark (U) inside lights up. FIX key (S
WIO) is ON, in step 136, SHF
is set to 31, and in step 137 S is stored in (RAM7).
By storing the LlF data, the display element -([,
The F mark (su) in the CD) lights up y:1. Step 1
Set the measurement value data at 38 and turn on the FIX key (SWIO).
To keep it fixed on the display as the exposure value,
[RAM where the memory for X should be stored:
Stores all constant value data. In the exposure calculation of Sten 1139, (S W a ).

When (S W 9 ) and (S W 10 ) are turned ON, the arithmetic processing to be executed is executed, and the calculated arithmetic value is displayed in step 140. Ste, 2 pu 1
41, H key (SWa), S key (SW9), FIX
After confirming that the key (SWIO) is turned OFF, proceed to step E. This allows for post-processing operations, and then the program is paused.

In steps 129, 130, and 131 above, press the H key (SW
a), S key (SW9), F I ) l- (SWIO)
If it is determined that is not ON, jump to step D of Pt56-5 diagram, and step
Performs tq determination while the TI RESET key (SWII) is ON. If you are ONL, step 1
Proceed to step 51, and if not ONL, proceed to step E above.
It then jumps to the end and continues with the post-processing and pause program without performing any operations.

In step 151, the setting of the 5INOLE/MULTI switch (SW14) is determined, and the MU
If LTI is selected, proceed to step 152; if 5INOLE, proceed to step E. Above MULTI RESET key (SWII)1. t,
Above S rNGLE/MULT r switch (SW14
) is MULTI, 'J<. In step 152,! rt calculation count MtJLTINO
Set O to D A 'r A 1, which indicates the measurement value integrated in step 153, and set O to D A T A 2.
Set. In step 154, GV, MULT I
Data to be calculated when selecting (SW14) hCMULTI with NO & 0.221, in this case, FN
, the value display becomes 0. The display element now indicates that a new integration measurement can be started.

FIG. 7 is a flowchart showing a program executed by an interrupt generated when the internal timer 〇 of the microcomputer (CPU) exceeds 70-. However, this is executed only if this interrupt is enabled. In step 200, interrupts are prohibited, in step 201 timer 2 is incremented by 1 count, and in step 208 timer 1 is incremented by 1 count. Timer 11 Sat.
The setting mode switch (SW12) is used to measure the time in the light standby state in measurements with NON and C. In step 202, it is determined whether the value of timer 2 calculated in step 201 is greater than a preset value T2. In the case of the light meter of this embodiment, for example, the value of T2 is set so that the timer 2 data is thicker than T2 when 8 seconds have elapsed.
There is.

In the above step 202, if the timer 2 is lower than T2, the output terminal (PO4) is outputted as Low (No. 3), and the display lighting member is set to the 11τ lighting state.In step 204, the value of the timer 2 is output. It is determined whether tq is greater than a preset value of T.

In the case of the light meter of this embodiment, for example, 11 minutes have elapsed.
The value of T is set so that the data of timer 2 becomes larger than T at the 17th point. If timer 2 is greater than T, step 21st jumps;
Data for turning on the entire display of the display element (LCD) is stored from (RAMI) to (RAMI6), and the entire display of the display element (LCD) is turned off.

In step 216, the output terminal - (PO2) is set to Low.
Higl+IJ is supplied to (i and P2O).

In step 217, 1 (
By manually inputting the iHh signal, only the interruption that occurs is permitted, and in step 218, the timer 2 is set to 0 and the program is temporarily stopped. This allows recall 5-(
Since the sloaf (ffi W) is being supplied only to SW6), the only way to restart a program that has been stopped in this state is to turn on recall 4-(SWG).

In other words, even if other keys are inadvertently turned on, the operation will not be reversed. In step 204, if timer 2 is smaller than T, step 205--set the constant momo-F switch (SW12) to flI, compare it with the previous state, and check whether the setting of this (SW12) has been changed. If there is, in step 206, the setting data of (SW12) is stored in (RAM9), and the AMB I
, C0RD, NON, C mark (Y), (power), (wa)
Implement display changes. Setting mode switch (SW12
), in step 207, 1
'IME/FN, the settings of the switch (SW13) are determined, and if there is a change from the previous state, the display element ( Change the ROM mark (B) in the LCD).

In addition, if there is no change in the above (SW13) setting, the 5INGLE/MUI-TI switch (SW14) setting is set ↑ in step 209, and if there is a change from the previous state, in step 210 the display is M in the element (LCD)
tJLTI, Lamark (su), GV Maichiri (nu), Ju-
(
Data is stored in RAM4) and (RAM5).

If there is no change in each switch in steps 205, 207, and 209, in step 212, the input terminal (INTB
), and after allowing the interrupt due to the input of the HiHI+ signal and the interrupt due to the timer 〇 over 70-, the program returns to the address where it starts the main market operation.

Up to now, we have not described how to use the stack pointer in interrupt operations, but since the use of the stack pointer in accordance with interrupts is common and is not directly related to the present invention1, we have omitted it here. It is stated in

” Steps 205, 207, 209 (SW 12
), (SW 13 ), and (SW 14 >), the process proceeds to step 211 after the operation for 3 displays, and the changed (SW
12 ), (SW 13 ), and (SW 1,i), the display corresponding to the data to be exposed is
Data that becomes 0 from (RAM 1 ) to (RA
M5). Then the program goes to step 21
Proceed to step 2. This makes it a static switch (
SW 12 ), (SW 13 ), (SW 14 )
is checked every time there is an interrupt caused by the internal timer 〇 over 70-.

Figures 8-1 and 18-2 show I shown in the fjSG diagram.
This is a 70-chart showing the exposure calculation in the 70-chart of NTr3.

At step 300 (SW8), (SW9).

(SWIO) is turned on, tq determination is performed to determine whether the set S II F is O,
If not (), that is, (S W 8 ), (S W
9).

If the exposure calculation by turning on (swto) is performed or has already been performed, the process moves to step 308,
If it is 0, proceed to step 301. T in step 301
When the tlI setting of the IME/FN switch (SW13) is performed and 'l'1MEy>' is selected, the process goes to step 304 and the display data, that is, WDA
Perform AV calculation to measure the AV value using TAI and WDΔ'TA2. At this time, the following calculation is performed for AvHl.

8M81 =WDAT^1- TV, -----(
7)F1. ^1 = WD 8 to 8 +
GV, --(8)^vto-8MB1+2FL
Al-(9)AVIO AVIO” 10g22-110)AV,
= AVIO+ SV, = (
11) In equation (7), WDATAI is the BV value of stationary light at a shutter speed of 1 second, and TV is a base-2 logarithm of the reciprocal of the set or calculated shutter speed. (8) W I) AT
A2 shows the BV value of only 7 lashes. S
vo is an SV value of ISO sensitivity set externally.

These calculations have already been published in Japanese Patent Application Laid-Open No. 55-1056.
Since this issue is discussed in detail in Publication No. 9, we will omit the details here.

However, GV in equation (8) is a value indicating how many steps brighter or darker the flash light is to be made, and 0 is normally input. Furthermore, when WDΔTA2 shows 0 in equation (8), that is, when there is no flash light, GVo
Whatever the value, the calculation is performed so that F L A 1 is 0. In the calculation of equation (9), a term representing a power of 2 is calculated so that if its antilogous number is O, the term becomes 0.

Only in this AV calculation in step 304, the calculated AV value is the FN of the exposure meter of this embodiment.

When the value is larger than the display range, the FNo mark flashes (give No. 3 to (RAM14) and set the OVF.On the other hand, when the value is smaller than the display range, FN,
Give a signal that causes the mark to blink to (r?AM14) and set the UDF. Of course, in the display range, OV
[', UDF is reset. F in step 301
If N, is selected, 5I is selected in step 302.
N(”, if the state of the LE/MULTI switch (SW14) is set to f and MULTI is selected,
Exposure number calculation in step 307 calculates the number of exposures necessary to satisfy the shutter speed, FN, and value that have already been set. Therefore, the following calculations are performed.

AVIO= AVo −SV, −□
(12) 8M[11=WDAT81-T,
-(13) FL^1 = round DAT^2
-(14)MtlLTINO=TNT
(NIJLTINO') -(1G)MULT
[NO' ≠ HULTINO, then MULTINO=
MULTINO+ 1^VIO 2= (MULTINO)X (2^MBl+2FLA
l) ~ (17) AVIO=Iog2 2^VI0
．． 8) AV,, = AVIO+
SV, ----(19)(12
), AV is the AV value corresponding to the set value of FN. The brightness of the stationary light at the shutter speed set by equation (13) is calculated, and equation (14) is simply a substitution. The denominator of equation (15) is the linear amount of light brightness that is a combination of steady light and flash light obtained in one exposure at a set shutter speed. Therefore, the number of exposures MULTINO' required for photographing is calculated using the "N. value set in equation (15). However, since MULTINO' is a value that includes a decimal and the number of exposures is an integer, (16) MLILT I No'
q part of (n h is defined as MULTINO. Here, if MULTINO' and MULTINO are a ratio, that is, M U +,, T r N O' cn If the decimal part is 0, then the FN to be displayed 37 , the value is the FN value corresponding to the set AV and the current value.

However, MULT T No' and MULT
r NOh"!r Shik '+: 11t+, M U L
, T I'N O1n17) ia尤Te1. t,AV,
The exposure would be insufficient to take a picture with the FN value corresponding to . Therefore, by increasing MtJLTINO by one time, (17),
(+8).

(+9) Execute the formula and M (J L 'I" r N
01i] The optical teno AV value is calculated and displayed. In other words, the set FN value will be displayed with a fraction attached. Konotosa, MULT r N
When o has a value less than 1, a signal for making the MULTI mark blink is added to the i light signal indicated by MUL'rINO&, and is stored in (RAM4). At the same time, if the measurement light is too bright, set the OVF to 2.
to When MULT I No is a value of 10 or more,
No. 13 for the flashing MtJLTI mark is MUL.
It is added to the TINO display off signal and stored in (11AM4), and UDF is sent to mean that the measurement light is over 1 times as high. Of course, MULT I N 07! It
1 Color 9 t', ltl! ',OVF,UDFl,
It will be reset.

In step 302, if (SW14) is selected as 5INGLE, the process proceeds to step 303, and the setting state of the setting mode switch (SW12) is determined. Here, if AMBI is selected, the process proceeds to step 305; otherwise, the process proceeds to step 306.

In step 305, the shutter angle that satisfies the set FNu value is calculated.

＾VIQ=AVo-SV, □-(20) TV,,
= WDATAI-AVIO-□-(21
) (20) and (21) are general apex vt calculations.

Wl) ATAl indicates the brightness of stationary light at a shutter speed of 1 second and includes a decimal part.

Therefore, TV in equation (21) also includes a decimal part, but this decimal part is displayed as a fraction of the set FN value. If the second TV shows a high speed that exceeds the display range of the shutter speed of 71S7[ of this embodiment, T
A signal that makes the I M E mark blink (RAM13)
The measurement light is too bright.
Set cOVF. In addition, if the slow shank below the display range is shown in 1, set the signal that makes the TIME mark blink to (r?AM13), and set the UD F because the measurement light is too 11:1. set. Within the display range, OvF, UI)F are reset. At this time, (RAM 4 ) and (RAM 5 ) are set so that the GV and MULT I No displays are turned off.

With Sten 1306, the set shutter speed and FN
, the level of flash required to obtain proper exposure is calculated and displayed as a value called GV by how many steps should be increased or decreased from the measured 7 flash values.

AV10=AV, -SV, -(20)TVl
=W[)ATAl -8V10---(21)
If TV+≧TVo, then TV, = TV1+1 −(2
3) Other than that, TVO = TVO-- (24) AV20 = WDATAI -TV, -
-(25)2 8v30= 2^VIO-^V20
(26) 8V30 AVIO= Ic)l? 2 2
(27) GVo' = AV30 - W(l
ATA12 − (28) to V, = INT
(GV,' ) --(29)Cvo'≠
Cv0c If Cvo≧0, cv, = cv, +1--(
:10) Other than soh (:V, = GV, --(:11
)AMrfl=WDATAI-TV,
-(32)l゛1. Δ1 = WDATAI2
+GV, -(3:1)AVIOAMIII +
2FL8' ---(34)2 22 ^v1 8VIO" loH2 ---(:'+5)^V,
= AVIO+ SV, --(36)
-L is the content of l)1' calculation in this step. (2
0).

Equation (21) is the calculation performed in step 305,
Using equations (23) and (24), determine whether the set shutter speed is appropriate or not. If H shows a value faster than the set shutter speed, if you take a picture with the combination of the set shutter speed, FN, and value, it will be overexposed to only the ambient light.Therefore, in this case) replaces the shutter speed obtained by equation (23) with the set output speed and automatically creates a situation where at least 7 flashes of light are required. The brightness of the stationary light is subtracted from the value set linearly in equations (25) and (26) to obtain the amount of light necessary for the flash, and the amount is replaced by the apex value in equation (27). Execution of equation (28) calculates the excess or deficiency with respect to the measured 7 run rate.

Also, if the value GV,' is displayed with a decimal part, it is sufficient to display this GVo value, but in the light meter of this embodiment, the GV value is displayed in II'i pinch, so (29), (
30), correction is applied using the (old) formula. In equation (29), let V be the integer of c;
If the decimal part of is not 0, then according to the formula, G V o
' If 〆GV,M holds, and if GV is positive, increase the value of GV by one step. If GVo is negative,
By defining the integer of GV,' as GV, the same thing can be achieved, so there is no need to make it one step larger.

When GVo'=GVo, GV, where the decimal part of G'1/, +' is 0, can be left as is.

(32), (3:I), (34), (35), (36)
The formula is the same as the calculation in step 304, where GV is a
This is for calculating the fraction of the set FN and value after 1 calculation. If this GVo is larger than the display range, the GV and MULTrNO display will be blank, and the
The signal ° of the blinking V mark (nu) is stored in (RAM 5), and the UDF is set because the measurement light is too bright. If GV is smaller than the display range, G
V, MtJLT I NO3 indication (H) becomes blank and the GV mark blinks (Storing No. 3 in (RAMP), the measurement light is too bright, so O
Set VF. If within the display range, OVF, Ul
') F is reset. At this time (RAM4),
MULT I, '77-Ri(su) lights up 71 lights, MUL
Data for not displaying TrNO data is stored.

By setting OVF and UDF like this, OV(!
r7-ri(tsu), when α decreases, press the up key (SW3)
++ When the d e r mark (n) is blinking, the Grankey (S
If W4) is turned on, an appropriate value will be displayed.

In step 308, the AV measurement in step 04 is performed on the final measurement value, and in step 309,
If the first memory is stored, the first memory is lit and AV calculation is performed. In step 310,
If the second memory is stored, AV calculation is performed for the second memory, and in step 311 the FI
By turning on the X key (SWIO), L:″
If data is stored in IX memory, FIX
The AV meter is discharged to the memory. However, step 30
The answer to step 8 is carried out as AVI, the answer to step 309 is carried out as AV2, the answer to step 310 is carried out as AV3, and the answer to step 311 is carried out as AV4.

Next, proceed to step F in Figure 8-2, and proceed to step F of Stella 7'31.
2'cS HF Kao Kado Uka frI2 Sale, 0 (7)
If (SW8), (SW9), (SWI O)
If the wave body executed by turning on any of the keys is not waved, the process advances to step 313.

1 Sat in 313 steps, A displayed as digital
In step 314, if there is a first memory, the deviation from AV2 according to the first memory is calculated with respect to Vo, and in step 315, the deviation from AV2 on the second day is calculated. If there is memory, 2
The deviation from the AV according to the memory of the normal eye is ΔA1, respectively.
It is calculated as 1ΔA21ΔA. This ΔA 11
ΔA 21ΔA, displays analog dots (R
AMII), and the analog dot lights up as a difference in crystal value from the digital value.

In step 312, if S )I F is not O, determine whether tq is 1 in step 316, and if it is 1,
The process advances to step 317. Here, M indicates the number of memories. Fl indicates whether there are two memories by N.
If I is set and two memories are stored, the two memories are classified by size tf in step 318, and if the second memory is large, two memories are stored in step 319.
From the AV from the th memory, delete the predetermined value BIASl.
The value of S H only indicates an open state.

In step 318, if the first memory is larger, in step 320, from the first memory to B
IAS) Subtract I. If it is determined in step 317 that two memories are not included, then in step 321 it is determined tq whether one memory is included. 1
If there are 1 memories, the operation of step 320 is executed, and if no memories are included, the final measured value is stored as the 1st memory in steps 322 and 323. In step 324, the AV for the final measurement value is assigned to AV2, and in step 25, M
Let N be 1. Thereafter, 320 steps of calculation are performed. If S II F is not 1 in step 316, determine whether it is 2 in step 326, and if so,
The process advances to step 327. step 327 3
35, compared to steps 317 to 325, in step 330 the r3I predetermined in AV2 from the first memory is smaller than the second memory.
The value Ass is added to the AV from the second memory, which is smaller than the first memory, in step 329.
The explanation of the other steps, which differ only in that 3 I ASS is added, will be omitted because they are the same as steps 317 to 325.

If S )IF is not 2 in step 32G above, S
Since HF is 3, AV from the FIX memory is replaced with AV and binding in step 336. By executing steps 316 to 329, by turning on the above 11 key (SW8), a certain value (nlAsH) is set for the brighter value of the memorized values or for the final measured value. FN, open value as FNo
(By instructing the ti display (D), an instruction value for overexposing the calculated value by a certain amount is displayed and fixed.

Also, by turning on the S key (SW9),
By instructing the FNut1 display (wo) to reduce the FN by a certain value (BIASS) for the dark value of the memorized value or for the final measured value, a total of $7. ．． Displays and fixes the specified value for underexposure by a certain area.

Also, by turning on the FIX key (SWIO),
Fix the measured value to a digital display, specifically FN, value. Subsequent measured values are not displayed on the digital display, but are displayed on the analog dot as ΔA in step 313 as a deviation from the analog index 0. In other words, the analog decoder (1') C7) is configured so that the analog dot with the analog index 0'' is always expressed as a dot with a value corresponding to AV. Also,
The first memory is also digitally displayed (FNoNo
ΔA2 as the deviation from the hidden pt corresponding AV,
The deviation from the analog finger +1 is displayed as a dot on the analog dot. Similarly, the second memory is ΔA as a deviation from the AV corresponding to the digital display (FN, digit display), which is displayed as a dot on the analog dot as a deviation from the analog index 0.

In the above embodiment, the H key (SW8), the S key <
5W9) By turning on the FIX key (SWlo), the calculated value is fixed on the digital display, and subsequent measured values are displayed on the analog dot as the deviation from the digitally displayed value. . As a result, the above I
I key (SW8), S key (SW9), F4X key (S
By turning on WIO), performance r1. When the value is fixed as the camera's exposure value, what is the relationship between the measured value at each point 1 in the subject and the fixed value? When a subject is photographed, it is possible to understand on analog dots how each point in the subject will appear in the final image J:.

By turning on the memory key (SW5), the measured values are memorized, but you can recognize how many values are currently memorized by lighting up the memory mark corresponding to the memorized number. . Furthermore, when a memory value is recalled using the recall key (SW6), the memory mark corresponding to the recalled memory is decremented, thereby making it possible to recognize which memory is currently being recalled.

Press the MULTI RESET key (SWII)
NGLE/MULT I switch (SW14) M t
By providing it outside the J L T I position, what should be made up of two switches can be made up of one switch member.

By turning on the recall key (SW6), the data held in the microcomputer (cpu) is destroyed! Since it will not be damaged or changed, it can be used as a starting switch to turn on the display lighting member (LED) that illuminates the display element (LCD).
The above recall key (SW6) can also be used.

In this example, when a measurement is performed, only the digital display displayed as the measured value becomes -Momentary Planck,
Displays corresponding to other set data continue to be displayed regardless of the measurement operation.

Such a display operation during measurement makes it easy to see the measurement data and confirm the measurement.

In the NON and C measurements in this example, by setting the light holding state once, the measurement is updated every time 7 runs of light enters the exposure meter in this example within a certain period of time. There is no need to press the measurement button or the like to enter the light standby state for each measurement.

Further, it can be easily recognized whether the exposure meter of this embodiment is currently in the standby state by the blinking operation of the NON and C marks in the display element (LED).

In addition, in this example, when the shutter speed, FN, and value are set in advance and a photograph is taken with this combination of exposures, the brightness of the flash required to obtain the appropriate exposure is calculated. Calculations are programmed. When shooting using a flash with a fixed FN value due to limb depth of field, etc., up until now, the required FN, value has been determined by repeatedly measuring while changing the flash light 1. However, the light meter of this embodiment instructs how the light amount should be for 7 degrees by one measurement.

Furthermore, the exposure meter of this embodiment is programmed with calculations for calculating the number of exposures necessary to obtain appropriate exposure using a preset shutter speed, FN, and value. Up until now, calculations and measurements have been repeated to find the number of integrations to reach the required FN value, that is, the number of exposures, but in this example,
After one measurement, the required number of exposures is calculated and displayed.

In the above embodiment, memory mark 1 (ri) and memory mark 22 (shi) are respectively numbered "1" and "2".
In addition, in step 86 in the 70-chart of FIG. 6-3, the [memory mark ltlY light] may be performed together with the "memory mark 2.-χ light". This allows the number of stored photometric values to be displayed numerically. In this case, 116
- As in step 105 or 106 in Figure 3,
Mark (number) corresponding to the recalled memory value
However, it may be configured so that only the numbers corresponding to the recalled memory values are continuously displayed.Furthermore, it may be configured so that the number of stored values is displayed using a 7-segment display. . Further, the number of memory items may be three or more.

(Left below) ? Due to the effect of light, as described in detail, the photometric H position according to the present invention is
A photometry p stage, a photometry start means that starts the operation of the photometry means in response to the P operation, and a predetermined calculation that performs a predetermined calculation from the set value corresponding to the preselected parameter and the photometry result to set the predetermined parameter. arithmetic means for obtaining corresponding calculated values; display means for displaying the set values, calculations, and values; and selection means for selecting a match between the preset parameters and the calculated parameters; After the photometry means starts operating, a display control p stage is set at it+f, where the calculated value is displayed, to control the display T = stage so that the display corresponding to the calculated parameter is momentarily blank. By configuring it in this way, the display of the corresponding parameter becomes blank momentarily in response to the movement of the photometer.
The operator can easily identify that a measurement has been performed, and also easily recognize which of the multiple displayed values is the set value and which is the θ+n value. be able to.

[Brief Description of the Drawings] Figures 1 to 8 show embodiments of the present invention.
The figure is a block diagram showing the overall configuration, ttS2 figure (a) is an exterior front view, [2 figure (1,) is an exterior side view, Figure 3 is an explanatory diagram showing the display, and Figure 4 is a block diagram showing the display section. Figure, 15
Figures 1 to 18 are r70 charts showing the processing procedure. (C1) (C2): Photometry means, (c P U ): Photometry III starting means, performance means, (L
CD): /2 Show rzC2, (SW13): Selected child f father, (CPU) (DV 1>: & Show control "r= stage. Applicant Minolta Camera System Company No. 1.-d Figure B-f figure

Claims (1)

[Scope of Claims] 1. Photometry means; Photometry start means for starting the operation of the photometry means in response to a manual operation; A calculation means for calculating a calculation value corresponding to a predetermined parameter; a display means for displaying the set value and the calculation value respectively; a selection means for selecting a combination of the preset parameter and the calculated parameter; A photometer comprising: display control means for controlling the display means to momentarily blank the display corresponding to the calculated parameter after the means starts operating and before the calculated value is displayed. Device. 2. The selection means can select either an aperture priority mode in which the aperture value is set in advance and the shutter speed is calculated, or a shutter speed priority mode in which the shutter speed is set in advance and the aperture value is calculated. A photometric device according to claim 1. 3. The photometric device according to claim 1, wherein the parameters preset and calculated by the selection means are an aperture value, a shutter speed, and a deviation in flash light amount.