JP2739691B2 - Camera with film information setting device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a camera provided with a film information setting device for setting film information in a camera using film information provided in a film cartridge. .

BACKGROUND OF THE INVENTION Cameras that read DX codes stored on a film cartridge and automatically set film information are already known.

Conventionally, in a camera of this type, since film information to be automatically set is uniquely determined by a DX code, a strict application such as a professional photographer, for example, a film A is automatically set to ISO064, but is automatically set to ISO80. However, it is not possible to individually cope with such a situation that a desired color can be obtained by setting the film information to the camera, and eventually there is a problem that the user is required to manually set the film information.

(Object of the Invention) An object of the present invention is to provide a camera having a film information setting device capable of easily informing film information before correction.

(Features of the Invention) In order to achieve the above object, the present invention according to claim 1 provides a DX code reading means for reading a DX code provided in a film cartridge, and a DX code read by the DX code reading means. First conversion means for converting the film information into information; information correction means for inputting correction information for specific film information by an external operation; and the DX code reading means according to the correction information input by the information correction means. To convert DX code read into film information
And film information display means for displaying the film information converted by the first conversion means when a specific switch input is made.

According to a second aspect of the present invention, there is provided a film information reading means for reading film information provided in a film cartridge, an information correcting means for inputting correction information for specific film information by an external operation, and an input by the information correcting means. Converting means for converting the film information read by the film information reading means in accordance with the correction information to be read; and displaying the film information read by the film information means by a specific switch input. Film information display means.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

FIG. 1 is a block diagram of a camera including an embodiment of the present invention. 101 is a microcomputer for controlling and calculating the camera, 102 is an up / down button for setting information of the camera, or 90 ° phase. An up / down counter connected to a rotary dial or the like for generating two-phase pulses different from each other to perform an up / down count for setting information;
Is a photometric circuit for obtaining external luminance information for controlling the exposure of the camera, 104 is a film controller for winding and rewinding the film, and 105 is an exposure control for controlling the shutter and the aperture. Unit, 106 is a display circuit for causing a display to perform display, 107 is an external display of the camera, 108
Is a DX code reading circuit for reading the DX code stored in the film cartridge. SWM is a manual film speed setting switch, SWC is a DX code correction switch, SWD is
DX code display switches, which are connected to the micro-computer 101.

FIG. 2 shows a display form on the display 107. FIG. 2 (a) shows an all-lit state, and FIGS. 2 (b) and 2 (c) show film sensitivity information display examples. See below).

FIG. 3 is a diagram showing a conversion table between DX codes and ISO values.

It is widely known that the camera automatically sets the ISO value and the number of shots by reading the DX code recorded on the film cartridge, but the table of `` DX code vs. ISO value '' is shown in the table. FIG. 3A shows an initial state in which all the DX code set corrections described later are not performed.
FIG. 8B is an example of a table after the DX code set has been corrected.

In each figure, the part corresponding to the ISO value of the DX code is represented by a 5-bit binary code.
The corresponding ISO value is 25-50 expressed in ISO Table 1.
There are 24 stages up to 00. Normally, conversion of DX code to ISO value is fixed like “DX code vs. ISO table” in the figure.
Although the conversion is performed using a one-to-one correspondence table, the present embodiment has an ISO table 2 that can be corrected in addition to the reference ISO value of the ISO table 1, and enables DX code correction to be described later. DX
When no code correction is performed, the contents of the ISO table 1 and the ISO table 2 are completely the same as shown in FIG.

Next, the operation of the microcomputer 101 will be described with reference to the flowchart of FIG.

[Step 1] When the operation of the microcomputer 101 is started by turning on a power switch (not shown), it is determined whether or not the film should be automatically loaded. If it is assumed that the film is loaded and the back lid is closed, it is necessary to perform auto-loading, so that the process proceeds to step 2.

[Step 2] The DX code reading circuit 108 reads the DX code recorded on the film cartridge.

[Step 3] The read DX code is converted into an ISO value using the table in FIG.

[Step 4] The ISO value data converted by using the ISO table 2 is stored in the ISO register in the microcomputer 101, and the ISO data in the microcomputer 101 is stored in the ISO register for subsequent exposure control and the like. We will use the data of the ISO value obtained.

[Step 5] Auto-loading is performed by operating the film control unit 104, and a flag is set when the auto-loading is completed.

By setting a flag when the auto-loading is completed, the auto-loading condition is cleared after returning to step 1 again, so that it is possible to prevent the repetition of step 1 → step 2 →, and thereafter to step 6. And proceed.

[Step 6] Check whether the DX code correction switch SWC is turned on. If it is not turned on, the process proceeds to step 7.

[Step 7] Check whether the DX code display switch SWD is turned on. If it is not turned on, the process proceeds to step 8.

[Step 8] Check whether the manual film sensitivity setting switch SWM is turned on. If it is not turned on, the operation of the camera according to the present invention has not been performed, and the program proceeds to the next step. On the other hand, if the switch SWM is on, the process proceeds to step 9.

[Step 9] The count value is read from the up / down counter 109.

[Step 10] The ISO value data in the ISO register is changed according to the count value read in step 9, and manual change of the ISO value is accepted.

[Step 11] The ISO value data changed in step 10 is output to the display circuit 106 and displayed on the display 107.

The description of the operation at the time of manually setting the ISO value is completed in steps 9 to 11 above.

The program returns to step 1 again, but step 1 →
The process proceeds from step 6 to step 7, and if the DX code display switch SWD is turned on this time, the process proceeds to step 12.

[Step 12] A DX code recorded on the film cartridge is input from the DX code reading circuit 108.

[Step 13] The DX code input in step 12 is converted into an ISO value based on the ISO table 1 in FIG. 3 (a).

[Step 14] The ISO value data converted in step 13 is sent to the display circuit 106 and displayed on the display 107.

Thus, for example, in a state where an ISO64 film cartridge is loaded, the steps 9 to 9 are performed.
Even if ISO 80 is set by manual ISO value setting up to 11, the original ISO 64 can be temporarily displayed as shown in FIG. 2 (b) by pressing the DX code display switch SWD. In this case, the ISO value in the original DX code is displayed only, and the ISO value in the ISO register used for exposure control etc. is not changed. There is no such trouble.

When the operation of step 14 is completed, the program returns to the start.

If it is determined that the DX code correction switch SWC has been turned on by proceeding from step 1 to step 6, the program proceeds to step 15.

[Step 15] DX code information is input from the DX code reading circuit 108.

[Step 16] The DX code input in step 15 is converted into an ISO value according to the ISO table 1 shown in FIG. 3 (a).

[Step 17] The ISO value converted in step 16 is output to the display circuit 106 and displayed on the display 107. Assuming that the ISO value recorded as the DX code is ISO64, the display is as shown in FIG. 2B.

[Step 18] Count data is input from the up / down counter 102.

[Step 19] The ISO value in the ISO register is changed according to the up / down count value input in step 18.

Note that if the ISO value stored in advance in the ISO register is different from that of the DX code due to manual setting, confusion may be caused. Before the change, the same ISO value as that represented by the DX code is stored in the ISO register. For example, +1 for ISO64 film with DX code
If the count is input, the data of ISO80 is stored in the ISO register.

[Step 20] DX code vs. ISO table 2 are corrected. In this case, the value of the ISO table 2 for the DX code of ISO64 is usually changed to ISO80, as shown in FIG. 3 (b).

[Step 21] The changed ISO value is output to the display circuit 106 and displayed on the display 107. In this case, the display is changed as shown in FIG.

Since the ISO table 2 has been changed in the above step 20, if the ISO value is set by reading the DX code in the steps 2 to 4 thereafter, the ISO table 2 is referred to in the step 3, Normally, when a film cartridge in which a DX code of ISO64 is recorded is newly loaded, the ISO cartridge shown in FIG.
Referring to Table 2, ISO80 is set as ISO information data.

The DX code can be corrected as described above.
Also, if the DX code display switch SWD is turned on after the DX code is corrected, since the above-described steps 12 to 14 are performed, the code is converted based on the information in the ISO table 1 regardless of the correction. The original ISO information can be confirmed on the display for display.

According to the present embodiment, by operating the DX code correction switch SWC and inputting a count value indicating the number of DX code correction stages, the film sensitivity information read by the DX code reading circuit 108 is converted according to the count value. ,
Since the converted film sensitivity information is stored in the memory, it is possible to correct a specific ISO value to an intended ISO value according to the user's preference.

In addition, since the film information corresponding to the original DX code before being converted in accordance with the operation of the DX code display switch SWM is displayed on the display 107, the user may forget the original film sensitivity information. There's nothing confusing.

(Correspondence of Embodiment of the Invention) In this embodiment, the DX code reading circuit 108
The X code reading means (Claim 1) or the film information reading means (Claim 2) is provided with a functional part of the microcomputer 101 for converting the DX code into the film information by using the ISO table 1, the first conversion means of the present invention. In addition, the DX code correction switch SWC and the up / down counter 102 serve as information correction means of the present invention, and the microcomputer 10 converts the DX code into film information according to the correction information using the ISO table 2.
The first functional part is provided to the second conversion means (claim 1) or the conversion means (claim 2) of the present invention by the DX code display switch SWD.
The display circuit 106 and the display 107 correspond to the film information display means of the present invention, respectively.

(Modification) In the present embodiment, the film sensitivity information is taken as an example of the film information. However, the present invention is not limited to this. For example, the film information may be applied to the number information or the latitude information.

(Effects of the Invention) As described above, according to the present invention, a DX code reading means for reading a DX code provided in a film cartridge and a DX code read by the DX code reading means are provided.
First converting means for converting a code into film information, information correcting means for inputting correction information for specific film information by an external operation, and reading the DX code according to the correction information input by the information correcting means. Means for converting the DX code read by the means into film information, and film information display means for displaying the film information converted by the first conversion means when a specific switch input is made. Is provided, the film information before correction can be easily notified. Therefore, even if film information is corrected when the film confirmation window provided on the back lid of the camera is abolished,
By performing a specific switch input, the film information before correction can be confirmed.

According to a second aspect of the present invention, there is provided a film information reading means for reading film information provided in a film cartridge, an information correcting means for inputting correction information for specific film information by an external operation, and an input by the information correcting means. Converting means for converting the film information read by the film information reading means in accordance with the correction information to be read; and displaying the film information read by the film information means by a specific switch input. With the provision of the film information display means, the film information before correction can be easily notified.
Therefore, when the film confirmation window provided on the back cover of the conventional camera is abolished, even if the film information is corrected, the film information before the correction can be confirmed by performing a specific switch input.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIGS. 2 (a), 2 (b) and 2 (c) are diagrams showing display forms on a display shown in FIG. 1, and FIGS. 3 (a) and 3 (b) 4) is a diagram showing the correspondence between DX codes and ISO tables 1 and 2 in one embodiment of the present invention, and FIG. 4 is a flowchart showing the operation in one embodiment of the present invention. 101 microcomputer, 102 up-down counter, 106 display circuit, 107 display, 108 D
Code reading circuit, SWM: Manual film sensitivity setting switch, SWC: DX code correction switch, SWD: DX code display switch.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-123824 (JP, A) JP-A-63-220231 (JP, A) JP-A-61-29823 (JP, A) 84528 (JP, A) JP-A-3-235928 (JP, A) JP-A-1-302335 (JP, A) JP-A 62-27339 (JP, U) JP-A 60-63824 (JP, U) Japanese Utility Model Showa 63-101922 (JP, U)

Claims (2)

(57) [Claims] 1. A DX code reading means for reading a DX code provided in a film cartridge, and a first means for converting the DX code read by the DX code reading means into film information.
Conversion means, information correction means for inputting correction information for specific film information by an external operation, and the DX code read by the DX code reading means according to the correction information input by the information correction means. A film information setting device comprising: a second conversion means for converting the film information into film information; and a film information display means for displaying the film information converted by the first conversion means when a specific switch input is performed. Having a camera. 2. A film information reading means for reading film information provided in a film cartridge, an information correcting means for inputting correction information for specific film information by an external operation, and a means for responding to the correction information input by the information correcting means. Conversion means for converting the film information read by the film information reading means, and film information display means for displaying the film information read by the film information means when a specific switch input is performed. A camera having a film information setting device provided.