JPH09258321A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To store the date of starting the use of film and the date of finishing the use of the film in the internal part of the camera or the external part of the camera and to display information stored in the internal part of the camera by storing calendar information and displaying the date of starting the use of film at the time of detecting that the film is loaded. SOLUTION: A loading detection circuit 1 detects that film is loaded and recognizes that the film is started to be used. A data back 3 generates date and time information. Then, information on the data of starting the use of the film is transferred and stored in an EEPROM 4 from a CPU 2. A display device 6 is constituted by arranging an LCD and an LED at the external part of the camera or in a finder and performs the ordinary mode display of the camera and the display of the date of starting the use of the film in accordance with the data transferred from the CPU 2, and various kinds of information are transmitted to a user. Therefore, the user judges film exchange by viewing the display of the camera.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera which stores information about the start date and end date and end of use of a film and displays it on a display or in a magnetic recording area of the film according to a user's request.

[0002]

2. Description of the Related Art Conventionally, the use start date and time and the use end date and time of a film depend on the memory of the user, or the user himself / herself made memos and the like to store and use the information. It was troublesome for the user.

[0003]

For users who do not take many photographs, it is often the case that a single film is left in the camera for an extended period of time. Such a situation deteriorates the performance of the film and deteriorates the quality of the finished photograph.

Therefore, in the present invention, the use start date and time and the use end date and time of the film are stored inside or outside the camera by a simple button operation without bothering the user, and are stored inside the camera. Provide a camera that can display information.

[0005]

In order to solve the above problems, in the camera of the present invention, calendar information generating means for generating date and time information, and loading detection means for detecting that a film has been loaded, When the loading detection unit detects the loading of the film, a storage unit that stores information output from the calendar information generation unit, a display unit that displays the calendar information, and a display unit that displays the calendar information on the display unit. It is provided with a selection means for whether or not to display, and when the display is selected, the date and time when the film is used is displayed on the display means.

Further, calendar information generating means for generating date and time information, loading detecting means for detecting loading of a film, storage means for storing information output from the calendar information generating means, and magnetic An information recording means for recording information in a magnetic recording area of a recordable film, and a selection means for selecting whether or not to record the calendar information in the information recording means, and when the magnetic recording is selected, the calendar is selected. Information is recorded in the magnetic recording area of the film.

Further, the calendar information is information on the use start date and time and the use end date and time of the film, and the information can be used at the time of developing and printing the film.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The most preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an embodiment of a camera of the present invention. In the figure, the loading detection circuit 1 detects the loading of a film with a switch or the like, monitors the perforation of the film with a photoreflector or a photointerrupter, or rotates the data disc on the film cartridge with a photoreflector or the like. By monitoring, it is possible to detect that the film has been normally fed, recognize that the film has started to be used, and transfer the information to the CPU 2.

The data back 3 includes year, month, day, hour, minute,
Date and time information such as seconds can be generated, and the information can be transferred to the CPU 2 using a communication function such as serial communication provided in the data bag 3.

An EEPROM (internal storage device) 4 stores and stores information on the start date and time of use of the film from the CPU 2. Further, the EEPROM (internal storage device) 4 is
The information stored by the request from the CPU2 is stored in the CPU2.
Can be transferred to. In addition, EEPROM4
Has a communication function such as serial communication for transferring information.

The selection switch 5 uses one or a plurality of push buttons and on / off switches to instruct the CPU 2 to change the normal display mode of the camera or to change the film use start date / time from the normal display mode of the camera. You can request to switch to the display. Further, it is possible to select whether or not to write the use start date and time and the use end date and time of the film in the magnetic recording area of the film for the CPU 2.

The display device 6 is an LCD (Liquid Crystal Display Board) or L
An ED (light emitting diode) or the like is placed outside the camera or inside the viewfinder, and the normal mode display of the camera and the start date and time of the film are displayed according to the data sent from the CPU 2, and various information is displayed to the user. It is being communicated.

The magnetic information writing circuit 7 is composed of a constant current bridge circuit or an equivalent integrated circuit (IC) using a transistor or a transistor array, and according to the magnetic information writing signal from the CPU 2, the magnetic information writing circuit 7 Information can be written with an optimum write current. Also, the circuit is configured so that the write current can be adjusted to an optimum value.

For the CPU 2, a one-chip microcomputer having at least an input / output port, a timer function, a serial communication function, and a circuit for driving an LCD or an LED as a display device is used.

FIG. 2 shows another embodiment in which the data back 3 is not provided in the configuration of FIG. 1, and the CPU 2 itself is provided with the calendar function 8 by software by using the timer function. Date instead of data back 3
Time information may be generated.

The CPU 2 can select at least two types of display modes. That is, the display mode of the use start date and time, and the display mode in which the use start date and time and the use end date and time can be selected to be magnetically recorded on the film are incorporated in the CPU 2 by software.

Next, the operation procedure will be described with reference to the flowchart of FIG. When the film is inserted into the camera and the idling is normally performed, the loading detection circuit 1 informs the CPU 2 that the film has started to be used (S1).
01). The CPU 2 performs an idle feed (S102), and the information on the start of film use from the loading detection circuit indicates the year,
Information of month, day, hour, minute, second is obtained from the data back 3 or from the calendar function of the CPU 2 itself (S
103) The information on the use start date and time of the film is stored in the EEPROM (internal information storage device) using the serial communication function (S104), and the camera operation preparation is completed.

Next, when the user operates the selection switch 5 to select the display mode of the date and time of start of use after the camera starts operating (S105), the CPU 2 causes the EEPROM to operate.
The information of the use start date and time stored in the (internal storage device) 4 is taken out, and the use start date is displayed on the display device 6 (S
112).

When the user operates the selection switch 5 to select the normal mode (S105), the normal camera display is displayed (S106). The filming is repeated (S107) when the filming is repeated, and the film is rewound (S108). Here, the user operates the selection switch 5 to start and end the use date and time as the information to be magnetically recorded on the film. If you select to write (S
109), when rewinding, the CPU 2 writes the information in the leader portion of the film through the magnetic information writing circuit (S110), and the film rewinding is completed (S111).

[0020]

If the film is left in the camera for a long period of time, the performance will be deteriorated and the quality of the photograph will be deteriorated. Therefore, by carrying out the present invention, even if the user of the camera uses one film for a long period of time,
You can easily know the start date and time of use. Therefore, the user can judge the exchange of the film by looking at the display on the camera.

Further, magnetic information such that the start date and time of use and the end date and time of use can be printed on the index print can be left on the film, and the information can be used at the time of developing and printing the film.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a camera according to the present invention.

FIG. 2 is a block diagram showing the configuration of another embodiment of the camera according to the present invention.

FIG. 3 is a flowchart for explaining information display and recording operation of the camera according to the present invention.

[Explanation of symbols]

 1 Loading Detection Circuit 2 CPU (Microcomputer) 3 Data Back 4 EEPROM (Internal Storage Device) 5 Selection Switch 6 Display Device 7 Magnetic Information Writing Circuit 8 Calendar Function

Claims (3)

[Claims] 1. Calendar information generating means for generating date and time information, load detecting means for detecting loading of a film, and calendar information generating when the load detecting means detects loading of a film. A storage unit that stores information output by the unit, a display unit that displays the calendar information, and a selection unit that selects whether or not to display the calendar information on the display unit, and if Display is selected, A camera characterized in that the display start date and time of use of the film is displayed. 2. A calendar information generating means for generating date and time information, a loading detecting means for detecting that a film is loaded, a storage means for storing information output from the calendar information generating means, and a magnetic recording medium. An information recording means for recording information in a magnetic recording area of a recordable film, and a selection means for selecting whether or not to record the calendar information in the information recording means, and when the magnetic recording is selected, the calendar is selected. A camera characterized by recording information in a magnetic recording area of a film. 3. The camera according to claim 1 or 2, wherein the calendar information is information on a use start date and time and a use end date and time of the film.