JPH08220621A - Camera displaying film sensitivity - Google Patents

Abstract

PURPOSE: To inform a photographer of film sensitivity without increasing the cost by displaying the sensitivity set by a sensitivity setting means on a display device for displaying photographing information. CONSTITUTION: The camera for displaying the film sensitivity is provided with the display device (LCD) 4 for displaying the photographing information of the camera and the sensitivity setting means setting the film sensitivity, to display the set sensitivity on the LCD 4. Then, ISO sensitivity set by a manual operation is displayed on the frame count display part of the LCD 4 or a date display part and the high-order digits of the ISO sensitivity are displayed. Therefore, even if a film except the ISO sensitivity setting range of the camera is used, the camera can deal with the film, without providing the display device for displaying the ISO sensitivity. Thus, the increase of the cost can be suppressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera for displaying film sensitivity on a display device for displaying photographing information of the camera.

[0002]

2. Description of the Related Art Conventionally, a film sensitivity of a film has been automatically set by a camera reading a DX code written on a film cartridge.
That is, the film sensitivity is automatically set.

[0003]

However, when the film sensitivity can be manually set, a dedicated display device for informing the photographer of the film sensitivity must be provided, which causes a problem of cost increase. there were.

The present invention has been made in view of the above problems, and an object thereof is to inform a photographer of film sensitivity without increasing cost.

[0005]

To achieve this object, a camera for displaying film sensitivity of the present invention comprises a display device for displaying photographing information of the camera and a sensitivity setting for automatically or manually setting the film sensitivity. And a means for displaying the sensitivity set by the sensitivity setting means on the display device.

[0006]

In the camera having the above-mentioned structure for displaying the film sensitivity, since the sensitivity set by the sensitivity setting means is also displayed on the display device for displaying various kinds of photographing information, the display device is also used. It is possible to inform the photographer of the film sensitivity without inviting.

[0007]

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

FIG. 1 is a block diagram showing an embodiment of a camera capable of setting the film sensitivity outside the range according to the present invention.

In FIG. 1, a CPU 1 is a one-chip microcomputer and controls the entire sequence of the camera. The CPU 1 has a RAM, a timer function for measuring time, a counter function, an A / D conversion function, and the like. The CPU 1 includes a power supply circuit 3, a display device 4 (hereinafter, referred to as LCD 4), and a non-volatile memory 5.
(Hereinafter referred to as EEPROM 5), AF circuit 6, AE
The circuit 7, shutter 8, strobe circuit 9, motor driver circuit 10, film photo interrupter 13, and lens barrel photo interrupter 14 are connected.

The CPU 1 has a main switch 15 and a zoom-up switch 1 as operation members operated by a photographer.
6, a zoom down switch 17, a back cover switch 18, a half press switch 19 of a release button, and a full press switch 20 of a release button are connected.

The power supply circuit 3 uses the battery 2 as a power source, regulates the battery voltage, and supplies it to each circuit. The display device 4 displays shooting information such as the shooting mode, the number of films, the zoom position, and the date. The EEPROM 5 is prewritten with predetermined data necessary for the photographing process. This predetermined data is stored in the CPU when it is necessary to perform a predetermined process.
1 reads.

The AF circuit 6 sends distance measurement data corresponding to the distance to the subject to the CPU 1, and the CPU 1 calculates the distance to the subject. The AE circuit 7 transmits photometric data according to the brightness of the subject to the CPU 1, and the CPU 1 calculates the shutter speed and aperture value of the shutter 8 from the photometric data and the ISO sensitivity of the film. The shutter 8 opens and closes a shutter sector at the calculated shutter speed and aperture value to perform exposure.

The strobe circuit 9 comprises a strobe condenser booster and a light emission controller, and controls boosting and light emission by a signal from the CPU 1. Motor driver circuit 10
Responds to a signal from the CPU 1 to cause the film motor 11 for zooming up and zooming down the lens barrel and the lens barrel motor 12 for film feeding to rotate in the forward and reverse directions or to stop.

The film photo interrupter 13 sends a pulse signal to the CPU 1 in response to the feeding of the film.
The CPU 1 counts the feeding pulse signal and controls the motor driver circuit 10. Lens barrel photo interrupter 14
Transmits a pulse signal to the CPU 1 according to zoom-up and zoom-down of the lens barrel, and the CPU 1 controls the motor driver circuit 10 by counting the lens barrel pulse signal.

The main switch 15 is a momentary switch, and is a switch operating member that cyclically switches the camera to a photographable state and a photographable state each time it is turned on. The zoom-up switch 16 is a switch operating member for zooming up the lens barrel when turned on. The zoom-down switch 17 is a switch operating member for zooming down the lens barrel when turned on. The back cover switch 18 is a switch operating member that is turned on or off depending on whether the back cover of the camera is opened or closed.

The half-push switch 19 is a switch operating member which is turned on by half-pushing the release button.
When is turned on, the camera performs photometry and distance measurement. The full-press switch 20 is a switch operating member that is turned on by fully pressing the release button. When the full-press switch 20 is turned on, the camera performs an exposure process.

In the following, among the programs written in the CPU 1, the ISO sensitivity is set manually,
The display and cancellation will be described.

FIG. 2 is a flow chart showing the zoom-up processing and zoom-down processing of the camera in which the film sensitivity can be set outside the range, and the program is started by being called from the main routine (not shown).

When the main switch 15 is turned on and the camera is ready for shooting, when the zoom-up switch 16 is turned on, the ZUS process (zoom-up process) which is the zoom-up process from step S200.
To start. In step S202, it is determined whether the lens barrel has been driven to a predetermined position. If it is driven, the process proceeds to step S209, and if it is not driven, step S2
Go to 03. In step S203, the motor driver circuit 10 drives the lens barrel motor 12 in the zoom-up direction to a predetermined lens barrel position in response to a signal from the CPU 1, and proceeds to step S206.

When the main switch 15 is turned on and the camera is ready for photographing, when the zoom down switch 17 is turned on, the ZDS process (zoom down process) which is the zoom down process from step S201.
To start. In step S204, it is determined whether the lens barrel has been driven to a predetermined position. If it is driven, the process proceeds to step S209, and if it is not driven, step S2
Go to 05. In step S205, the motor driver circuit 10 drives the lens barrel motor 12 in the zoom-down direction to a predetermined lens barrel position in response to a signal from the CPU 1, and proceeds to step S206.

In step S206, it is determined whether the zoom-up switch 16 is turned on. If it is turned on, the process returns to step S202, and if it is turned off, the process proceeds to step S207. In step S207, it is determined whether or not the zoom down switch 17 is turned on. If it is turned on, the process returns to step S204, and if it is not turned on, the process proceeds to step S208.

In step S208, ZUS processing (zoom-up processing) and ZDS processing (zoom-down processing)
To return to the main routine (not shown).

Step S202 and step S204
Then, if the lens barrel is driven to the predetermined position, the process proceeds to step S209, and it is determined whether or not the ISO sensitivity is set by manual operation. If not set, the process proceeds to step S210. In step S210, it is determined whether the main switch 15 is on or off. If the main switch 15 is off, the process proceeds to step S206, and if it is on, the process proceeds to step S211.

In step S211, it is determined whether the timer 1 is counting. If it is counting, the process proceeds to step S213, and if it is not counting, step S2.
After proceeding to step 12 and starting the timer 1, step S21
Go to 3. In step S213, it is determined whether the timer 1 has timed out. If the time is not up, the process proceeds to step S206, and if the time is up, the process proceeds to step S214. In step S214, ZU
It is determined whether or not S processing is performed. If it is ZUS processing, the process proceeds to step S215, and it is determined that a predetermined ISO sensitivity higher than the ISO sensitivity that can be read from the DX code is selected, and the CPU
The data is set in a memory (not shown) which is a storage device in No. 1, and the process proceeds to step S217. If it is not ZUS processing, step S
If the predetermined ISO sensitivity lower than the ISO sensitivity that can be read from the DX code is selected, the CPU 1
It is set in a memory (not shown), which is a storage device inside, and the process proceeds to step S217.

In step S217, the upper digit of the ISO sensitivity set in the film number display section of the display device 4 is displayed, and the flow advances to step S218. In step S218,
It is displayed on the number-of-films display section of the display device 4 for a predetermined time, and the process proceeds to step S219. In step S219,
The display on the display device 4 is returned to the original display of the number of films, and the process proceeds to step S206. The upper digit of the ISO sensitivity set in the film number display section of the display device 4 is, for example, IS
If it is set to O1600, "16" is displayed and IS
If it is set to O50, "5" is displayed.

In this way, the zoom-up switch 1
By turning on the main switch 15 with 6 turned on and continuing to turn on at the same time for a predetermined time, a predetermined ISO sensitivity higher than the ISO sensitivity that can be read from the DX code can be set. Further, by turning on the main switch 15 with the zoom-down switch 17 turned on and continuing to turn on at the same time for a predetermined time, it is possible to set a predetermined ISO sensitivity lower than the ISO sensitivity that can be read from the DX code.

In step S209, if the ISO sensitivity is set manually, the process proceeds to step S220. In step S220, the zoom up switch 1
It is determined whether 6 is turned on. If it is not turned on, the process proceeds to step S208, and if it is turned on, the process proceeds to step S221. In step S221, it is determined whether or not the zoom down switch 17 is turned on.
If it is not turned on, the process proceeds to step S208, and if it is turned on, the process proceeds to step S222.

In step S222, it is determined whether the timer 2 is counting. If counting, step S
224. If not counting, step S223.
Go to step S224 after starting timer 2
Proceed to. In step S224, it is determined whether the timer 2 has timed out. If the timer 2 has timed out, the process proceeds to step S206. If the timer 2 has not timed out, the ISO sensitivity setting set by the manual operation is canceled in step S225, and then the process proceeds to step S206.

In this way, the zoom-up switch 1
6 and the zoom-down switch 17 are kept on for a predetermined time so that the ISO set by the manual operation is set.
The sensitivity setting can be canceled.

In the above-mentioned embodiment, the ISO sensitivity set by the manual operation is canceled, but as another method, the back cover of the camera is opened to open the back cover switch 18.
The setting can be canceled when is turned on. Also,
The setting can be canceled by replacing the battery 2 which is the power source of the camera.

Further, in the above-mentioned embodiment, the ISO speed is displayed on the film number display section of the display device 4, but it may be displayed on the date display section of the display device 4.

Further, I set by manual operation
By writing the SO sensitivity information in the EEPROM 5, it is possible to prevent the setting from being canceled even if the battery 2 which is the power source is replaced.

According to the embodiment described above, the ISO sensitivity set by the manual operation is displayed on the film number display section or the date display section of the LCD 4,
Since the upper digit of the SO sensitivity is displayed, the IS of the camera can be
Even if a film out of the O sensitivity setting range is used, it is possible to deal with it, and an effect that cost increase can be suppressed can be obtained.

[0034]

As described above, according to the camera for displaying the film sensitivity of the present invention, the sensitivity set by the sensitivity setting means is displayed on the display device for displaying various photographing information. Since it also serves as the device, it is possible to inform the photographer of the film sensitivity without increasing the cost.

[Brief description of drawings]

FIG. 1 is a block connection diagram showing an embodiment of a camera for displaying film sensitivity according to the present invention.

FIG. 2 is a flowchart showing an embodiment of a camera for displaying film sensitivity according to the present invention.

[Explanation of symbols]

 1 CPU 2 Battery 3 Power Supply Circuit 4 LCD 5 EEPROM 6 AF Circuit 7 AE Circuit 8 Shutter 9 Strobe Circuit 10 Motor Driver Circuit 11 Film Motor 12 Lens Tube Motor 13 Film PI 14 Lens Tube PI 15 Main Switch 16 Zoom Up Switch 17 Zoom Down Switch 18 Back cover switch 19 Half-push switch 20 Full-push switch

Claims (5)

[Claims] 1. A display device for displaying photographing information of a camera, and a sensitivity setting means for automatically or manually setting a film sensitivity, wherein the sensitivity set by the sensitivity setting means is displayed on the display device. A camera that displays the film speed. 2. A camera for displaying film sensitivity according to claim 1, wherein the film sensitivity set by the sensitivity setting means is displayed on a film number display section of the display device. 3. The camera for displaying film sensitivity according to claim 1, wherein the film sensitivity set by the sensitivity setting means is displayed on a date display section of the display device. 4. The camera for displaying film sensitivity according to claim 1, wherein the upper digit of the film sensitivity set by the sensitivity setting means is displayed on the display device. 5. The camera according to claim 1, wherein the film sensitivity set by the sensitivity setting means is displayed on the display device for a predetermined time.