JP2006267405A - Electronic apparatus and camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic apparatus in which unnecessary detecting operations for RFID tag information are decreased by performing a detecting operation for the RFID tag information with an appropriate timing. <P>SOLUTION: The electronic apparatus to which an RFID-tag-mounted component is attachable includes: an attached state detecting means for detecting the attached state of the RFID-tag-mounted component; and an RFID tag information detecting means 7 for detecting the RFID tag information of the RFID-tag-mounted component when the attached state of the RFID-tag-mounted component is detected by the attached state detecting means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronic device in which a component having an RFID tag capable of transmitting a specific signal is detachable.

  In recent years, pre-determined specific information called an RFID tag is stored in a storage means, and an electrical component that can transmit the stored information by wireless means has started to spread. The power of the RFID tag is supplied from the RFID tag information detection means in a non-contact manner, so there is no need for a battery, and there are some that are small in size and capable of data rewriting. As a means for transmitting the determined specific information to the camera body, it is a very attractive electric part with size and cost.

A refrigerator having RFID tag information detection means reads RFID tag information starting from a change in the open / close detection switch of the refrigerator door. That is, the RFID tag information in the refrigerator is read by using the door open / close detection switch as a trigger when the door is changed from the opened state to the closed state. (See Patent Document 1)
JP 2003-097884 A

  The refrigerator having the above-described RFID tag information detection means, regardless of whether an article is actually put in and out when the refrigerator door is opened or closed, and whether or not there is a product with an RFID tag in the put in and out, The RFID tag information detection operation is executed in conjunction with the opening and closing of the door.

  Accordingly, there is a problem that the detection operation is executed even when the detection operation of the RFID tag information is not necessary, and the power consumption for the detection operation of the RFID tag information is wasted.

  Further, in an apparatus in which the operation sequence of the apparatus is changed according to the detected RFID tag information, it is necessary to set the timing for executing the detection operation of the RFID tag information in consideration of the operation sequence of the apparatus.

  An object of the present invention is to solve such problems and to provide an electronic device with little useless operation for detecting RFID tag information by executing an operation for detecting RFID tag information at an appropriate timing.

  The present invention is an electronic device on which an RFID tag mounting component can be mounted, and a mounting detection unit that detects mounting of the RFID tag mounting component, and when mounting of the RFID tag mounting component is detected by the mounting detection unit, RFID tag information detecting means for detecting the RFID tag information of the RFID tag mounting component.

  Further, the present invention is an electronic device on which a plurality of types of RFID tag mounting components can be mounted, and storage means for storing RFID tag information of a plurality of types of RFID tag mounting components in advance, and each type of RFID tag mounting components. The RFID tag information of the RFID tag mounted component is detected when the mounting of the RFID tag mounted component is detected by any one of the plurality of mounting detection means and the plurality of mounting detection means. RFID tag information detecting means for detecting the RFID tag information detected by the RFID tag information detecting means from the RFID tag information stored in the storage means. The type of RFID tag mounting component is estimated and searched according to whether the mounting of the RFID tag mounting component is detected by the means. Is characterized in that narrow the FID tag information.

  According to the present invention, since the RFID tag information of the RFID tag mounted component is detected in response to the detection of the mounting of the RFID tag mounted component, it is possible to reduce useless operation of detecting the RFID tag information.

  FIG. 1 is an electric block diagram showing a camera system which is the best embodiment of the present invention.

  Reference numeral 1 denotes a camera body, and reference numeral 2 denotes a lens unit that is detachably attached to the camera body 1. The lens unit 2 includes information about the lens unit itself and an RFID tag 2a capable of transmitting the information, and further includes an optical lens 2b, a lens driving unit (not shown), a diaphragm unit, and the like. Yes. When the lens unit 2 is attached to the camera body 1, a lens attachment detection switch (lens attachment detection SW) 6 provided in the camera body 1 changes from off to on, and this change is controlled by the control means 12 of the camera body 1. Is detected, the RFID tag information detecting means 7 is controlled to receive the RFID tag information transmitted from the RFID tag 2a of the mounted lens unit 2, and the RFID tag information of the mounted lens unit 2 is detected.

  In this embodiment, there are two types of lens units, a lens unit A and a lens unit B, and either one of the lens unit A or the lens unit B can be attached to the camera body 1. The camera body 1 has a subject photometry means 13. When the lens unit A is attached to the camera body 1, the lens unit A is attached to the photometry means 13 based on the RFID tag information of the lens unit A. Perform a specific metering value correction as appropriate. On the other hand, when the lens unit B is attached to the camera body 1, specific photometric value correction suitable for the lens unit B is performed on the photometric unit 13 based on the RFID tag information of the lens unit B.

  Reference numeral 3 denotes a focus plate, which is used for the photographer to check the image on the focus plate with the finder means by focusing the subject light from the taking lens on the focus plate as in the case of a conventional single-lens reflex camera. is there. In the camera system of this embodiment, the focus plate 3 is configured to be detachable.

  The focus plate 3 includes an RFID tag 3a capable of transmitting information on the focus plate itself and transmitting the information. When the focus plate 3 is attached to the camera body 1, the focus plate 3 is attached to the camera body 1. When the provided focus plate mounting detection switch (focus plate mounting detection SW) 8 changes from OFF to ON, and this change is detected by the control means 12 of the camera body 1, the RFID tag information detection means 7 is controlled to be mounted. The RFID tag information transmitted from the RFID tag 3a of the focused plate 3 is received, and the RFID tag information of the mounted focus plate 3 is detected.

  In this camera system, a plurality of types of focus plates 3 are prepared according to the purpose of photographing. For example, a focus plate A that supports superimpose display in the focus area, and a focus plate that does not support superimpose display in the focus area. There are two types of B. Whether or not the superimpose display is supported is recorded in the RFID tag information on the focus plate. Either one of the focus plate A and the focus plate B can be attached to the camera body 1. When the focus plate A is attached to the camera, the focus plate irradiation means 11 is directed toward the superimpose display prism formed on the focus plate A during the distance measuring operation based on the RFID tag information of the focus plate A. Irradiate light. On the other hand, when the focus plate B is attached to the camera, the focus plate irradiation unit 11 does not irradiate the focus plate B with light during the distance measuring operation based on the RFID tag information of the focus plate B.

  Reference numeral 4 denotes storage means, which can output information stored in the storage means 4 to the control means 12 and store information from the control means 12 in the storage means 4.

  Reference numeral 5 denotes a photographing means, which is a means for photographing through the mounted lens unit 2. For example, a finder unit, an exposure determination unit, a shutter unit, a photoelectric conversion unit, a signal processing unit, an image processing unit, and the like correspond to the photographing unit, but a detailed description thereof is omitted in this embodiment.

  13 is a photometric means for measuring the brightness of the subject, 14 is a distance measuring means for measuring the distance to the subject, 9 is a power source, and 10 is a non-volatile device to which image information from the photographing means 5 can be attached and detached. Image recording means for recording on the recording medium 15, 16 is a main switch, 17 is a release switch, and 18 is various switches.

  The lens mounting detection SW6 and the focus plate mounting detection SW8 may be mechanical switches or optical switches such as a photo reflector and a photo interrupter.

  FIG. 2 is an RFID tag number table used in this embodiment. In this embodiment, as an example of the RFID tag number, it is expressed by a binary number of 7 digits. The feature of the RFID tag number of this embodiment is that a certain specific digit represents a large classification of RFID tag mounting parts (for example, a large classification of camera parts such as a lens unit and a focus plate), and another specific digit is mounted with an RFID tag. It is a point that expresses a number that can specify a detailed specification of the part (type of lens unit, type of focus plate, etc.) and a manufacturing number. Specifically, the specific digit number is information obtained in a specific detection order detected by the camera body 1 as RFID tag information.

  The camera body 1 stores all the above-described RFID tag numbers in advance as an RFID tag information group in the storage unit 4 and further stores a sequence of the control unit 12 corresponding to the RFID tag number. The camera body 1 compares the RFID tag number information obtained from the RFID tag mounting component acquired by the RFID tag information detection unit 7 with the RFID tag information group stored in the storage unit 4, thereby mounting the mounted RFID tag. The classification and detailed specification of the mounted component are recognized, and further recorded in the storage unit 4 as RFID tag mounting information of the mounted RFID tag component.

  An example of an RFID mounting component used in this embodiment is a focus plate and a lens unit. In the case of a focus plate, the first three digits of the classification number is 000, and in the case of a lens unit, the classification number is 001. Further, the remaining four-digit specific number is a number that specifies the type of the component itself. In other words, the camera body 1 can identify the major classification of the RFID tag-mounted component only by detecting the first three-digit RFID number without analyzing all seven-digit RFID numbers. For example, if you want to detect RFID tag information only on the focus plate, discard the RFID tag information that does not fit in the first three digits of the classification number 000, and then check whether the last four digits are the specific number 0000 (focus plate A). What is necessary is just to determine whether it is 0001 (focus board B). When the classification number of the focus plate mounted on the camera is 000 but the specific number is not in the RFID tag information group of the storage means 4, such as 0002, for example, 0000002 is recorded in the storage means 4 as RFID tag mounting information. However, it is processed as other that cannot be recognized as the type of the focus plate.

  FIG. 3 shows the main sequence of this embodiment.

  When the main switch 16 is turned on (step 302), the control means 12 starts accepting the lens mounting detection SW6, the focus plate mounting detection SW8, the release switch 17, and the various switches 18 (step 303). The detection is repeated until the detection of the change is confirmed for these switches (“N” in step 304). If a change in the switch is detected (“Y” in step 304), or if a change in the lens attachment detection SW6 is detected (“Y” in step 305), the process jumps to the lens sequence in FIG. In the case of detecting a change in the focus plate attachment detection SW 8 (“Y” in step 306), the process jumps to the focus plate sequence in FIG. When the change of the release switch 17 is detected (“Y” in step 307), the process jumps to the release sequence of FIG. In the case of other switches, a sequence (not shown) is performed but the description is omitted (step 308). When the change of the main switch 16 is detected (“Y” in step 309), the lens mounting detection SW6, the focus plate mounting detection SW8, the release switch 17, and the various switches 18 are received (step 310), and the sequence is ended (step 310). Step 311).

  FIG. 4 shows a lens unit identification sequence. When a change in the lens mounting detection SW6 is detected (“Y” in step 305), whether the lens unit 2 is mounted on the camera body 1 (ON signal detection of the lens mounting detection SW6), or the lens unit 2 is in the camera body 1. If it is determined by the control means 12 that the lens unit 2 has been attached (“attachment” in step 401), the RFID tag information detection means 7 Then, detection of RFID tag information related to the lens unit 2 is started (step 402). As described with reference to FIG. 2, the RFID tag information is classified by the classification number, and only the RFID tag information having the first three digits 001 related to the lens unit is acquired and temporarily stored in the storage means 4, and the first three digits. All RFID tag information not applicable to 001 is not read (step 403). Whether the acquired RFID tag information matches the stored RFID tag information by comparing the acquired RFID tag information of the lens unit 2 with the RFID tag information stored in the storage unit 4 in advance by the camera body 1 Is determined (step 405). If the acquired RFID tag information matches the stored RFID tag information (“Y” in step 405), the acquired RFID tag information is stored in the storage unit 4 as RFID tag mounting information related to the mounted lens unit. Recording is performed (step 406), and RFID tag information detection is terminated (step 407). Based on the RFID tag mounting information relating to the lens unit stored in the storage unit 4, the control unit 12 changes the software corresponding to the mounted lens unit 2 (step 408) and returns to the main sequence in FIG. The software change corresponding to the mounted lens unit 2 is to change the correction amount for correcting the photometric information from the photometric means 13 to a value suitable for the optical performance of the mounted lens unit 2. .

  On the other hand, when it is determined that the lens unit 2 has detached from the camera body 1 (“detachment” in step 401), only the RFID tag mounting information related to the lens unit stored in the storage unit 4 is deleted (step 409). . At this time, since attachment / detachment of the focus plate 3 has not been detected, the process returns to the main sequence of FIG. 3 without deleting the RFID tag mounting information relating to the focus plate.

  FIG. 5 shows a focus plate identification sequence. When a change in the focus plate attachment detection SW8 is detected (“Y” in step 306), whether the focus plate 3 is attached to the camera body 1 (ON signal detection of the focus plate attachment detection SW8), or the focus plate 3 is the camera. When it is determined by the control means 12 whether it is detached from the body 1 (detection of OFF signal of the focus plate attachment detection SW8) and it is determined that the focus plate 3 is attached ("attachment" in step 501), RFID tag information detection means 7 starts detection of RFID tag information related to the focus plate 3 (step 502). As described with reference to FIG. 2, the RFID tag information is classified by the classification number, and only the RFID tag information with the first three digits 000 related to the focus plate is acquired and temporarily stored in the storage means 4, and the first three digits. All RFID tag information not applicable to 000 is not read (step 503). Whether the acquired RFID tag information matches the stored RFID tag information by comparing the acquired RFID tag information of the focus plate 3 with the RFID tag information stored in the storage unit 4 in advance by the camera body 1 Is determined (step 505). If the acquired RFID tag information matches the stored RFID tag information (“Y” in step 505), the acquired RFID tag information is stored in the storage unit 4 as RFID tag mounting information on the mounted focus plate. Recording is performed (step 506), and RFID tag information detection is terminated (step 507). Based on the RFID tag mounting information relating to the focus plate stored in the storage unit 4, the control unit 12 performs a software change corresponding to the mounted focus plate 3 (step 508), and returns to the main sequence. The software change corresponding to the mounted focus plate 3 means that when the focus plate A is mounted on the camera, the superimpose display prism formed on the focus plate A by the focus plate irradiation means 11 during the distance measuring operation. When the focus plate B is mounted on the camera, the software is changed such that the focus plate irradiation means 11 does not irradiate the light.

  On the other hand, if it is determined that the focus plate 3 is detached from the camera (“detachment” in step 501), only the RFID tag mounting information relating to the focus plate stored in the storage means 4 is deleted (step 509), and the lens Since the attachment / detachment of the unit is not detected, the RFID tag attachment information regarding the lens unit is not deleted, and the process returns to the main sequence of FIG.

  As shown in FIGS. 4 and 5, the RFID tag mounting component mounting detection switch such as the lens mounting detection SW6 and the focus plate mounting detection SW8 that can directly detect the mounting of the RFID mounting component such as the lens unit and the focus plate is provided. By providing the camera body 1, it is possible to specialize in detection and deletion of RFID tag information limited to a lens unit or a focus plate attached with an RFID tag.

  Since the RFID tag information detection operation can be performed immediately after the RFID tag component is mounted, the RFID tag information can be read immediately upon attachment / detachment of the RFID tag mounted component, and at the same time, there is no waste in the RFID tag information detection operation, and there is a power saving effect.

  Further, since the RFID tag information is read immediately in response to the attachment / detachment of the RFID tag mounting component, the RFID tag mounting information stored in the storage unit 4 and the RFID mounting component actually mounted on the camera body 1 are between. There can be no discrepancy. Thereby, it is possible to carry out a reliable sequence in accordance with the RFID tag information while performing reliable selection of the RFID tag mounting information.

  Furthermore, the RFID tag information reading start point is not used, but the RFID tag mounting component mounting detection switch such as the lens mounting detection SW6 and the focus plate mounting detection SW8 is used as a starting point. Since the detection by the information detecting means can be prevented, the release time lag does not occur due to the RFID tag information detecting action.

  Further, the RFID tag information stored in the camera can be deleted using the RFID tag mounting component mounting detection switch. That is, the RFID tag mounting information stored in the storage unit 4 can be deleted by detecting that the RFID tag mounting component from the camera body 1 has been removed. The RFID tag mounting information deletion method of this embodiment uses the RFID tag information detection means 7 to delete the RFID tag information by updating the RFID tag mounting information by confirming that there is no detectable RFID tag information. It can be done more quickly than the method. Further, it is possible to save the RFID tag mounting information of the RFID tag mounting component that is not attached / detached and to read out the RFID tag information related to the RFID tag mounting component that is not attached / detached.

  Furthermore, when acquiring RFID tag information, the RFID tag information reading target is narrowed down only to the component classification in which the mounting detection switch of the RFID tag mounting component has changed, and the RFID tag number classification is used, and the RFID tag information belonging to the unnecessary classification As for the RFID tag information acquisition time, the RFID tag information replacement time to the control means 12 without acquiring all the RFID tag information, and acquiring all the RFID tag information only for the RFID tag information belonging to the necessary classification. Therefore, the RFID tag information selection operation is not time-consuming.

  As a result, a camera with good operability can be realized.

  FIG. 6 shows a release sequence. When the change of the release switch 17 is detected (“Y” in step 307), the distance measuring unit 14 starts the distance measuring operation (step 601), and obtains the distance measuring information of the subject (step 602). Based on the distance measurement information, the lens is driven to a position where the subject is focused by the lens driving means of the lens unit 2 (step 603). The type of the focus plate 3 currently mounted is determined from the RFID tag mounting information stored in the storage means 4 (step 604). If the currently mounted focus plate is the focus plate A, the distance is measured. Light is emitted from the focus plate irradiation unit 11 toward the prism for superimpose display on the focus plate corresponding to the focus area (step 605). On the other hand, when the focus plate B or the focus plate in which the RFID tag information is not stored in the storage unit 4, the focus plate irradiation unit 11 does not irradiate light (step 606). Further, detection of the brightness information of the subject is started by the photometric means 13 (step 607), and the type information of the lens unit attached to the camera body 1 is further acquired from the storage means 4 (step 608). To correct. When the lens unit A is attached, a correction value suitable for the lens A is added to the photometric information (step 609), and when the lens unit B is attached, a correction value suitable for the lens B is added to the photometric information (step 609). 610), if the lens unit does not store the RFID tag information in the storage means 4, the exposure value, which is the shutter speed or aperture value, is determined without correcting the photometric information (step 612). If the illumination by the focusing screen illuminating means 11 is performed after a predetermined time has elapsed, the illumination is terminated (step 613), and the mirror for guiding the subject light from the lens unit is raised in the viewfinder (step 614). The subject light is guided to an image sensor that is a photoelectric conversion means. Charge accumulation by the image sensor is started (step 615), the shutter is opened (step 616), and when the predetermined time has been released, the shutter is closed (step 617), and charge accumulation by the image sensor is terminated (step 618). Then, the mirror is lowered (step 619), the photographing signal is read out from the image sensor (step 620), and the photographing signal is subjected to development and compression processing (step 621), and the image is recorded on the recording medium 15 using the image recording means 10. Recording is performed (step 622), and the process returns to the main sequence of FIG.

  As described above, in the present embodiment, an individual camera sequence is performed for each RFID tag information, thereby realizing finer optimization operation for each camera-mounted component.

  Further, in the present embodiment, a form in which an RFID tag mounting component such as a lens unit and a focusing plate is mounted on the camera body is disclosed. However, the RFID tag mounting component is not limited to the lens unit and the focusing plate. Any component can be used as long as it can be attached with an RFID tag such as a storage medium.

  Further, the RFID number example in FIG. 2 is an example, and the format is not limited as long as the information content can be classified by the RFID tag mounting component. In order to clarify the start or end of information, header information or end information may be added at the end of the RFID number.

Electrical block diagram showing the camera system of this embodiment RFID tag number table used in the camera system of this embodiment Main sequence of the camera system according to the present embodiment Lens sequence of the camera system according to the present embodiment Focus plate sequence of the camera system according to the present embodiment Release sequence of the camera system according to this embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Camera body 2 Lens unit 3 Focus board 4 Memory | storage means 6 Lens mounting detection switch 7 RFID tag information detection means 8 Focus board mounting detection switch 11 Focus board irradiation means 12 Control means 13 Photometry means

Claims (7)

An electronic device that can be mounted with an RFID tag mounting component,
Mounting detection means for detecting mounting of RFID tag mounting components;
An electronic device comprising: RFID tag information detection means for detecting RFID tag information of an RFID tag mounted component when mounting of the RFID tag mounted component is detected by the mounting detection means.   2. The electronic apparatus according to claim 1, further comprising storage means for storing RFID tag information of the RFID tag mounting component detected by the RFID tag information detection means as RFID tag mounting information.   The electronic apparatus according to claim 2, further comprising a control unit that deletes RFID tag mounting information stored in the storage unit when the mounting detection unit detects that the RFID tag mounting component is not mounted.   4. The electronic apparatus according to claim 1, further comprising a control unit that changes an operation sequence based on RFID tag information of the RFID tag mounting component detected by the RFID tag information detection unit. An electronic device capable of mounting a plurality of types of RFID tag mounting components,
Storage means for storing RFID tag information of a plurality of types of RFID tag-mounted components in advance;
A plurality of mounting detection means for detecting mounting of RFID tag mounting components for each type of RFID tag mounting components;
RFID tag information detection means for detecting RFID tag information of the RFID tag mounting component when the mounting of the RFID tag mounting component is detected by any of the plurality of mounting detection means;
Control means for retrieving RFID tag information detected by the RFID tag information detection means from the RFID tag information stored in the storage means, and the control means uses any of the attachment detection means to detect the RFID tag mounted component. An electronic apparatus characterized in that the type of RFID tag mounting component is estimated according to whether mounting is detected, and the RFID tag information to be searched is narrowed down. A camera capable of mounting a lens unit equipped with an RFID tag,
Metering means for metering through the attached lens unit;
Lens mounting detection means for detecting mounting of a lens unit mounted with an RFID tag;
RFID tag information detection means for detecting RFID tag information of a lens unit mounted with an RFID tag when the lens mounting detection means detects the mounting of a lens unit mounted with an RFID tag;
And a control unit that changes a photometric correction value of the photometric unit based on the RFID tag information of the lens unit mounted with the RFID tag detected by the RFID tag information detection unit. It is a camera that can be mounted with a focusing plate equipped with an RFID tag,
Focus plate irradiation means for irradiating light to the mounted focus plate;
Focus plate mounting detection means for detecting mounting of a focus plate mounted with an RFID tag;
RFID tag information detection means for detecting RFID tag information of a focus plate mounted with an RFID tag when mounting of a focus plate mounted with an RFID tag is detected by the focus plate mounting detection means;
And a control unit that controls whether to irradiate light by the focus plate irradiation unit based on RFID tag information of the focus plate mounted with the RFID tag detected by the RFID tag information detection unit.

Images