JPH0473625A - Photographing mode input device - Google Patents

Abstract

PURPOSE:To read the resistance value of a resistor and to automatically set a photographing mode corresponding to the read resistance value by inserting a card member corresponding to the photographing mode in an insertion chamber. CONSTITUTION:By changing the resistance value of the resistor 21 for every kind of photographing mode and changing a pattern 22a according to it, some kinds of card members can be prepared every photographing mode. Such a card member 20 is inserted in the insertion chamber 24 and a constant-current circuit for generating a constant current is connected to a contact part 26 which is connected to the terminal of the resistor 21. By impressing the current, an A/D converter reads a voltage obtained from the resistance value of the resistor 21 and supplies data corresponding to the voltage to a CPU. The CPU, which receives a signal obtained by half depressing a shutter button 11, selects a program corresponding to the data supplied from the A/D converter from a ROM. Thus, photographing desired by a photographer is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a camera, and more particularly to a photographing mode input device for a camera.

[Conventional technology]

Conventionally, the automatic exposure mechanism of a camera has a function that depends on the subject brightness.
There is a programmable AE that uniquely determines the combination of shutter speed and aperture value. However, with this programmable AE, it is possible to change the programmable AE to the photographer's desired mode based on the photographer's free will (as it is not possible to select the shooting conditions) to take pictures according to the photographer's purpose. 2. Description of the Related Art Cameras that take pictures are widely used.Such cameras are equipped with a shooting mode input device that manually inputs a shooting mode intended by a photographer into the camera.

As a shooting mode input device, one is known that uses a dial or button operation to input the shooting mode according to the photographer's will, but in order to simplify the operation, an IC card input method or a bar code input method is known. A method of inputting information using

In the IC card input method, an IC card with a built-in ROM and CPU that stores programs corresponding to the shooting mode is used, and when the photographer selects an IC card and inserts it into the camera, the You can change the shooting mode. In addition, in the barcode input method, a sample photo is selected according to the photographer's will from a sample photo collection corresponding to the shooting mode, and the barcode corresponding to the selected sample photo is read with a barcode reader. I am trying to input it into the camera.

[Problem H that the invention seeks to solve] However, the method of inputting the shooting mode into the camera using an IC card with a built-in ROM or CPU is expensive because the IC card itself is expensive.
Having a set of cards can be costly. Furthermore, in the case of the barcode input method, two items are required: a sample photo album corresponding to the shooting mode and a barcode reader, which is expensive and inconvenient to carry.

[Purpose of the invention]

The present invention was made in consideration of the above background, and
It is an object of the present invention to provide a camera which is excellent in portability, allows selecting a photographing mode with simple operation, and is equipped with a photographing mode input device on the premise of low cost.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a card member having a built-in resistor having a resistance value corresponding to the shooting mode, and an insertion chamber into which the card member is inserted. , a contact part provided in the insertion chamber and brought into contact with the resistor, a reading means for reading a resistance value through the contact part, and a mode selection means for selecting a photographing mode corresponding to the read resistance value. This configuration has two shooting mode input positions.

[Effect]

According to the above, by inserting the card member corresponding to the photographing mode into the insertion chamber, the resistance value of the resistor is read, and the photographing mode corresponding to the read resistance value is automatically set.

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

〔Example〕

In FIG. 1, a photographing lens 10 and a shutter button 1 are shown.
), main switch 12, display section 13, AF window 14
, a finder 15, and a strobe light emitting section 16 are provided on the camera.

When the main switch 12 of the camera is turned on, the lens barrier opens and the camera is ready for shooting. From now on, when taking pictures using programmable AE, look at the subject through the viewfinder 15 and press the shutter button 1) halfway.
Focusing is performed automatically, and when the shutter button 1) is then fully pressed, exposure is determined by the programmable AE and I-most shadow is performed.

Further, by attaching the card member 20 corresponding to the shooting mode to the camera, the photographer can take the desired image.

A pattern 22a corresponding to the shooting mode is displayed on the front surface of the card member 20, and a resistor 21 is provided on the back surface of the card member 20. This resistor 21 is provided with two terminals for external connection, and the resistance value between these terminals is a value corresponding to the shooting mode. Therefore, the resistor 21
By changing the resistance value for each type of shooting mode and changing the pattern 22a correspondingly, several types of card members can be prepared for each shooting mode.

Such a card member 20 is inserted into an insertion chamber 24 provided on the right side of the camera. This insertion chamber 24 is provided in a part of the holder 23 that can be opened and closed. This holder part 23 is provided with a transparent window 25, and the pattern 22a
is displayed externally. The arrow 22b displayed on the surface of the card member 20 indicates the insertion direction of the card member 20, and prevents unreadability or malfunction caused by inserting the card member 20 in the opposite direction.

A second image showing a state in which the card member 20 is installed in the insertion chamber 24.
In the figure, when the camera holder part 23 is closed,
A contact portion 26 that projects into the insertion chamber 24 is provided.

This contact part 26 is composed of two contacts 27 and 28,
The resistor 21 is inserted through the openings 29 and 30 provided in the insertion chamber 24.
connected to the terminal.

In FIG. 3 showing a block diagram of the camera with the card member 20 attached, a constant current circuit 33 that generates a constant current is connected to the contact portion 26 connected to the terminal of the resistor 21. . By applying this current, the A/D converter 34 reads the voltage obtained from the resistance value of the resistor 21 and converts data corresponding to this voltage into CP (
Supply to J35.

In FIG. 4, which is a detailed circuit configuration diagram of the A/D conversion 34, ■. is the voltage taken into the A/D conversion 34. In this case, each of the comparators 50a-g is ■.

are arranged as many as the number of quantization levels, and the reference voltages ■, ~■,
has been added. And each AND gate 51a to 5
Data b supplied to the CPU 35 is obtained by encoding the output from 1f. Note that data b is O
“1” or “0” signal b0~ sent from R gate
This is data that is a combination of b2.

After receiving a signal obtained by half-pressing the shutter button 1) (hereinafter referred to as the "r half-press signal"), the CPU 35 transfers a program corresponding to data b supplied from the A/D converter 34 to the ROM 36, which will be described later. You can choose from.

As shown in FIG. 5, the ROM 36 stores a program corresponding to the data b.

In the CP[J35, data necessary for performing arithmetic processing according to the program are shown in FIG. 3. A film sensitivity input device 43 for reading the film sensitivity, an AP device 44 for reading the subject distance, a photometry device 45 for reading the subject brightness,
It is supplied from the operation unit 46 including the shutter button 1) and the like.

Thereby, the CPU 35 performs arithmetic processing on data obtained from each of the above-mentioned devices, such as shutter speed and aperture value, according to the program stored in the ROM 36, and stores the resulting data in the RAM 47. . Thereafter, by pressing the shutter button 1), data is read from the RAM 47, and according to this data, the diaphragm device 37, shutter device 38, strobe device 39, and driver 40.41 are driven to take a picture as intended by the photographer. It is something. In addition, driver 40
indicates a driver IC that controls the display unit 13 shown in FIG. 1, for example, a liquid crystal display, and a driver 41 indicates a driver IC for driving the lens device 42.

The effect of the above configuration will be explained below.

First, turn on the main switch 12 of the camera. Thereafter, as described above, the card member 20 selected from among the various prepared card members according to the photographer's will is inserted into the insertion chamber 24. And shutter button 1)
In response to the half-press signal, voltage V0 is input to the A/D converter 34.

In FIG. 4, the voltage ■ corresponding to the resistance value of the resistor 21 is
. are taken into each of the comparators 50a to 50g. In this case, these comparators 50a~
The reference voltage applied to 50g ■1~■, is ■+
<Vt <Vs <Vs <V, <V.

And, for example, the voltage ■. The magnitude of is the reference voltage V, ~V
6, the outputs of comparators 50a to 50e to which reference voltages ■1 to ■ are applied become "1", and the outputs of comparators 5Of and 50g to which reference voltages Vh or more are applied become "0". .

As a result, only the output of the AND gate 51e becomes "L", and the data b obtained by the logical sum of the OR gates 53a to 53c becomes rloIJ.

As shown in FIG. 5, the ROM 36 stores programs corresponding to modes such as landscape mode, portrait mode, wedding mode, sports mode, auto bracket mode, and normal mode. For example, landscape mode is a mode that calculates the optimal aperture value based on film sensitivity data and subject distance data, controls exposure so that the background is within the depth of field, and takes pictures. In addition, the sports mode is a mode in which exposure is controlled to set the shutter speed to a high speed side based on film sensitivity data and subject distance data, and photography is performed.

Auto bracketing mode is a mode in which multiple shots are taken consecutively on the over side and under side with a fixed exposure difference based on an automatically determined exposure value.

Thereby, the CPU 35, for example, rl.

1", the ROM36
The landscape mode program is selected from the programs stored in the .

In addition, if the magnitude of the voltage V0 is equal to or less than the comparison voltage V, or ■1
If the data b is obtained in a size larger than that, the data b supplied from the A/D converter 34 is roooJ or rl 1). Then, the normal mode program corresponding to the program type AE shown in FIG. 5 is selected. According to this, even if a reading error occurs, the program will be executed in the normal mode, so you will not miss a photo opportunity.

As described above, the card member 20 of the embodiment according to the present invention is provided with the resistor 21 having a resistance value corresponding to the shooting mode. If this card member 20 is formed of, for example, an insulating resin or paper, and the resistor 21 is, for example, a resistor printed on the back side of the material, the card member 20 can be formed thin and lightweight. It becomes easier to carry. Moreover, mass productivity is improved and costs are reduced.

Furthermore, by displaying a pattern 22 corresponding to various shooting modes, such as a photograph, a picture, or a simple explanation corresponding to each card member, the shooting mode intended by the photographer can be displayed. A card member corresponding to the above can be easily selected.

In FIG. 6 showing another embodiment, a resistor 56 provided on the back surface of a card member 55 has a terminal 57 for external connection.
It has four. The resistance value between the terminals 57a and 57b is a resistance value 56a, and the resistance value between the terminals 57a and 57c is a resistance value 56b. Further, the resistance value between the terminal 57a and the terminal 57d is a resistance value 56c. As a result, the voltages corresponding to the respective resistances f156 a - c are converted into A/D converters 5
8 reads data 59 corresponding to each voltage.
Send a to c to the CPU 62. The CPU 62 selects from the ROM 63 a program corresponding to the data 59a, a program corresponding to the data 59b, and a program corresponding to the data 59c.

For example, a program corresponding to data 59a is a program to shift the shutter speed to a lower speed side, and a program corresponding to data 59b is a program to control the light amount of a strobe device.

The program corresponding to data 59c is a program that controls the aperture so that only the subject is in focus and the background is blurred.

The CPU 62 performs arithmetic processing based on data obtained from each device according to these programs.

According to this embodiment, it is possible to specify the photographing mode intended by the photographer in even more detailed nuances, and even beginners can perform photographing using advanced techniques.

〔Effect of the invention〕

As explained above, the shooting mode input device of the present invention includes:
The operation is simple because it is only necessary to insert a card member corresponding to the photographing mode into the insertion chamber.

Furthermore, since the card member only needs to have a built-in resistor, it can be made thin, lightweight, and easy to carry.

Furthermore, since the photographing mode input device of the present invention selects the photographing mode based on the resistance value of the resistor, costs can be significantly reduced compared to input using an IC card or bar code.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the appearance of a camera using the present invention. FIG. 2 is a perspective view showing the main parts of the present invention. FIG. 3 is a block diagram of a camera using the present invention. FIG. 4 is a circuit diagram of A/D conversion. FIG. 5 is a table showing programs corresponding to output data of A/D conversion. FIG. 6 is a block diagram showing another embodiment. 20... Card member 21... Resistor 24... Insertion chamber 26... Contact section 33... Constant current circuit 34... A/D Conversion 35 ・ ・ ・ ・ CPtJ 36 ・ ・ ・ ・ ROM

Claims (1)

[Claims] (1) A shooting mode input device for inputting a shooting mode intended by a photographer into a camera, which includes a card member having a built-in resistor having a resistance value corresponding to the shooting mode, and an insertion chamber into which the card member is inserted. a contact section provided in the insertion chamber and brought into contact with the resistor, a reading means for reading a resistance value through this contact section, and a mode selection means for selecting a photographing mode corresponding to the read resistance value. A photographing mode input device comprising: