JP2015119250A - Electronic apparatus and control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an authorized user's password input frequency while ensuring a security function.SOLUTION: An electronic apparatus 207 includes: wireless communication means 106; storage means 108 for storing unique information on specific wireless communication apparatuses 201, 203; search means 105 for searching for wireless communication apparatuses 201, 203, 205 existing around the electronic apparatus through the wireless communication means; comparison means 105 for comparing unique information on the wireless communication apparatus detected by the search with unique information on a specific wireless communication apparatus; and control means 105 for restricting use of an operation function of the electronic apparatus when the unique information on the detected wireless communication apparatus does not agree with the unique information on the specific wireless communication apparatus and permitting use of the operation function when the unique information on the detected wireless communication apparatus agrees with the unique information on the specific wireless communication apparatus.

Description

  The present invention relates to an image projection apparatus and other electronic devices having a security function.

  Many electronic devices have a wireless communication function, and some image projection apparatuses (projectors) that are a kind of electronic devices also have a wireless communication function. In addition, the electronic device is requested to input a password from the user at the time of startup, and the electronic device is permitted to use the electronic device only when the input password matches the password set in advance by the authorized user. Some have functions. Some projectors have such a security function.

  However, with the conventional security function, it is necessary for the authorized user to input the password every time it is activated, which is a troublesome operation for the authorized user.

  Patent Document 1 stores the installation state and setting state of a projector, and requests password input only when the state changes, thereby reducing the password input frequency of a regular user. A method is disclosed. According to this method, since the installation state and the setting state of a projector used in a stationary state are rarely changed, the frequency of password input can be reduced.

JP 2006-308826 A

  However, when the projector is carried around and used in multiple locations such as a conference room, the projector installation state often varies from location to location, and even if the user is the same, a password must be entered for each use. High nature.

  The present invention provides an electronic apparatus (image projection apparatus) that can reduce the frequency of password input by an authorized user while ensuring a security function.

  An electronic apparatus according to an aspect of the present invention is an electronic apparatus having a wireless communication unit, a storage unit that stores specific information of a specific wireless communication device, and a wireless device that exists around the electronic device through the wireless communication unit. Search means for searching for a communication device, comparison means for comparing the unique information of the wireless communication device detected by the search with the unique information of the specific wireless communication device, and the unique information of the detected wireless communication device is the specific wireless communication device Control that restricts the use of the operation function of the electronic device when it does not match the unique information of the wireless device, and permits the use of the operation function when the unique information of the detected wireless communication device matches the unique information of the specific wireless communication device Means.

  The electronic apparatus also includes an image projection apparatus that includes a light modulation element that modulates light and a projection optical system that projects the modulated light onto a projection surface.

  According to another aspect of the present invention, a control program causes a computer of an electronic device having wireless communication means to execute security processing. The security processing stores unique information of a specific wireless communication device, searches for wireless communication devices that exist around the electronic device through wireless communication means, and specifies specific information of the wireless communication device detected by the search as specific information. Compared with the unique information of the wireless communication device, when the detected unique information of the wireless communication device does not match the unique information of the specific wireless communication device, the use of the operation function of the electronic device is restricted, and the detected wireless communication device When the unique information matches the unique information of a specific wireless communication device, the use of the operation function is permitted.

  According to the present invention, only when the unique information of the wireless communication device detected by the search matches the unique information of the specific wireless communication device, the use of the operation function of the electronic device is permitted (even if no password is input). To do. For this reason, it is possible to reduce the frequency of password input by authorized users while ensuring the security function.

1 is a block diagram showing a configuration of an image projection apparatus that is Embodiment 1 of the present invention. FIG. 2 is a diagram schematically illustrating a wireless network accessed by the image projection apparatus according to the first embodiment. 6 is a flowchart illustrating a startup security initial setting process of the image projection apparatus according to the first embodiment. 5 is a flowchart illustrating activation security processing of the image projection apparatus according to the first embodiment. 9 is a flowchart showing activation security processing of an image projection apparatus that is Embodiment 2 of the present invention. The figure which showed typically the wireless network which the image projection apparatus of Example 2 accesses.

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

  FIG. 1 shows the configuration of an image projection apparatus that is Embodiment 1 of the present invention. An image projection apparatus is a kind of electronic equipment, and there is an apparatus using a liquid crystal panel or a digital micromirror device as a light modulation element. Hereinafter, an image projection apparatus using a liquid crystal panel will be described, and the image projection apparatus will be referred to as a projector.

  The projector includes an image projection unit 101, a video signal input unit 102, a video signal processing unit 103, a video signal output unit 104, a control unit 105, a wireless communication unit 106, a first storage unit 107, a second storage unit 108, and a user. The operation input unit 109 is configured.

  The video signal input unit 102 receives an external video signal input based on a control signal from the control unit 105, and supplies the video signal to the video signal processing unit 103 and the first storage unit 107. The first storage unit 107 stores video signals from the video signal input unit 102 and the video signal processing unit 103. The video signal processing unit 103 performs predetermined video processing on the video signal input from the video signal input unit 102 and the video signal stored in the first storage unit 107 based on the control signal from the control unit 105. . The predetermined video processing includes, for example, image quality adjustment such as video brightness, contrast, color shading, and edge enhancement, image size expansion and reduction, and OSD (On Screen Display) composition processing.

  The wireless communication unit (wireless communication means) 106 includes an antenna for wireless communication (not shown), and performs wireless communication with a wireless communication device typified by an access point through the antenna, thereby enabling a network such as a wireless LAN. Modulates and demodulates data transmitted / received to / from. Wireless communication is also simply referred to as communication in the following description.

  The second storage unit 108 stores a control program executed by the control unit 105, video processing adjustment parameters used in the video signal processing unit 103, a password, unique information related to the wireless communication unit 106, and the like. These stored contents are retained even when the power is turned off.

  The video signal output unit 104 is processed by the video signal processed by the video signal processing unit 103 or the video signal processing unit 103 stored in the first storage unit 107 based on the control signal from the control unit 105. The video signal is output to the image projection unit 101.

  The user operation input unit 109 outputs, for example, an instruction, a password, or the like input by the user using an operation button provided on the remote controller or the projector main body to the control unit 105.

  The image projection unit 101 includes a lamp 110 as a light source, a lamp driving unit 111, a liquid crystal panel 112, a panel driving unit 113, a projection lens (projection optical system) 114, and a lens driving unit 115.

  As the lamp 110, a light emitting discharge tube such as a high-pressure mercury lamp that emits white light is used. An LED may be used as a light source instead of the lamp 110. The lamp driving unit 111 controls driving power to the lamp 110 based on a control signal from the control unit 105, and turns on and off the lamp 110. White light from the lamp 110 is separated into green (G) light, red (R) light, and blue (B) light by a color separation optical system (not shown), and is guided to a liquid crystal panel 112 provided for each color. .

  The panel drive unit 113 generates a drive signal for driving the liquid crystal panel 112 for each color based on the control signal from the control unit 105 and the video signal output from the video signal output unit 104.

  The G light, the B light, and the R light are modulated for each color by the liquid crystal panel 112 driven in accordance with a drive signal from the liquid crystal panel drive unit 113, and then synthesized by a color synthesis optical system (not shown) and projected. Guided to the lens 114.

  The lens driving unit 115 adjusts the focus and zoom magnification of the projection lens 114 based on a control signal from the control unit 105. The projection lens 114 projects incident RGB composite light onto a projection surface 116 such as a screen at a set zoom magnification. As a result, a color image corresponding to the input video signal is displayed.

  FIG. 2 schematically shows the projector 207 of this embodiment, the access point, and its network area. If projector 207 is located in a network area indicating a range where radio waves from an access point can reach, it can be connected (accessed) to a network such as a wireless LAN through the access point. In FIG. 2, an access point 201 having a network area 202, an access point 203 having a network area 204, and an access point 205 having a network area 206 exist around the projector 207. Since projector 207 is located in network area 202 and network area 204, it can communicate with access points 201 and 203. On the other hand, since projector 207 is located outside network area 206, it cannot communicate with access point 205.

  Each access point has, as unique information, an SSID (Service Set Identifier) and a BSSID (Basic Service Set Identifier) corresponding to a MAC address (Media Access Control address). In this embodiment, the access point 201 has AAA as the SSID and aa: aa: aa: aa: aa: aa as the BSSID. The access point 203 has BBB as the SSID and bb: bb: bb: bb: bb: bb as the BSSID. Further, the access point 205 has CCC as the SSID and cc: cc: cc: cc: cc: cc as the BSSID.

  Next, processing performed by the projector according to the present embodiment in the environment illustrated in FIG. 2 will be described with reference to FIGS. 3 and 4. The flowchart of FIG. 3 shows processing at the time of initial setting for startup security. This process and the process shown in FIG. 4 are executed by a control unit 105 as a computer according to a control program as a computer program. The control unit 105 functions as search means, comparison means, and control means.

  In step 301, the control unit 105 checks whether a password for activation security has already been set. This password is used to prevent unauthorized use by a user other than a regular user of the projector (non-regular user) or change of the setting contents of the projector by a non-regular user. That is, when the same password as the set password is input, operation functions such as an image projection function and various setting change functions of the projector can be used. If the password has already been set and stored in the second storage unit 108, the process proceeds to step 303. When the password is not set, the process proceeds to step 302, and the user is requested to input and set the password. This request is made through an OSD screen or a display unit (not shown) provided on the projector body. When the user operates the user operation input unit 109 to input a password, the password is stored in the second storage unit 108 and the setting is completed.

  In step 303, the control unit 105 causes the user to input the password again from the user operation input unit 109 and confirms whether or not the password matches the password stored in the second storage unit 108. If the passwords match, the process proceeds to step 304. If the passwords do not match, the process ends.

  In step 304, the control unit 105 searches for (scans) surrounding access points through the wireless communication unit 106. In this search, the wireless communication unit 106 receives the beacon transmitted by the access point, and detects the access point. The wireless communication unit 106 transmits a probe request, and detects the access point by receiving a probe response transmitted from the access point that received the probe request. If an access point is detected, control unit 105 proceeds to step 306.

  In the environment illustrated in FIG. 2, the control unit 105 detects the access point 201 and the access point 203. If the access point cannot be searched, the process proceeds to step 305. In step 305, communication may be impossible even if the projector 207 is located in the network area depending on the state of the radio wave, so the control unit 105 confirms whether or not the search has been repeated a predetermined number of times. . If it has not been repeated a predetermined number of times, the control unit 105 proceeds to step 304 and performs a search again. When it is repeated a predetermined number of times, the control unit 105 determines that there is no access point in the vicinity, and ends this process.

  In step 306, the control unit 105 acquires unique information of the detected access point. Specifically, the unique information is acquired from the beacon or probe response of the detected access point. In the environment illustrated in FIG. 2, AAA as SSID and aa: aa: aa: aa: aa: aa as BSSID are acquired as unique information of the access point 201. Moreover, BBB which is SSID and bb: bb: bb: bb: bb: bb as BSSID are acquired as unique information of the access point 203.

  Next, in Step 307, the control unit 105 displays a list of the access point specific information detected in Step 306 on the OSD screen or the display unit.

  Next, in Step 308, the control unit 105 displays one of the unique information of the access points displayed in Step 307 as a list of unique information used for activation security for the user through the display on the OSD screen or the display unit. Let me select above. When the unique information is selected by the user through the user operation input unit 109, the unique information (hereinafter referred to as specific unique information) is stored in the second storage unit.

  Through the above initial setting process for start-up security, the specific storage information for start-up security is stored in the second storage unit 108, and the start-up security using the specific-use specific information instead of the password is activated from the next start-up of the projector. Can be.

  The flowchart in FIG. 4 shows the startup security process in this embodiment. In step 401, the control unit 105 confirms whether the activation security is valid. That is, since whether or not to use activation security is set in advance by user settings, the settings are confirmed. If it is invalid, the process proceeds to step 407, and if it is valid, the process proceeds to step 402. If specific specific information is stored in the second storage unit 108, the activation security may be automatically validated without performing confirmation in this step.

  In step 402, the control unit 105 searches for an access point in the vicinity as in step 304 of FIG. If the access point can be detected, the process proceeds to step 404. If the access point cannot be detected, the process proceeds to step 403.

  In step 403, as in step 305 in FIG. 3, the control unit 105 checks whether the search has been repeated a predetermined number of times. If it has not been repeated a predetermined number of times, the process proceeds to step 402, and the control unit 105 searches for surrounding access points again. If it has been repeated a predetermined number of times, the control unit 105 determines that there is no access point in the vicinity, and proceeds to step 406.

  In step 404, the control unit 105 acquires the unique information of the detected access point, similarly to step 306 in FIG. In the environment illustrated in FIG. 2, AAA as SSID and aa: aa: aa: aa: aa: aa as BSSID are acquired as unique information of the access point 201. Moreover, BBB which is SSID and bb: bb: bb: bb: bb: bb as BSSID are acquired as unique information of the access point 203.

  Next, in step 405, the control unit 105 compares each piece of unique information acquired in step 404 with the specific unique information stored in the second storage unit 108 for activation security. If any of the unique information acquired in step 404 matches the specific unique information, the process proceeds to step 407, and the control unit 105 changes the image projection function and various settings of the projector without requesting the user to input a password. Permits the use (activation) of all operation functions including functions. On the other hand, if they do not match, the process proceeds to step 406.

  In step 406, the control unit 105 determines the password for the user when there is no access point in the surroundings and when there is no access point (specific access point) having specific information that matches the specific specific information. Make an input request. This input request is made through display on the OSD screen or the display unit. When the user inputs a password through the user operation input unit 109, the control unit 105 compares this input password with the password stored in the second storage unit 108.

  If the passwords match, the process proceeds to step 407, and the control unit 105 permits the use (activation) of all operation functions including the image projection function and various setting change functions of the projector. If they do not match, the process proceeds to step 408, and the control unit 105 restricts the use (activation) of all operation functions including the image projection function and various setting change functions of the projector. Then, for example, an inquiry to the administrator is displayed so that an operation other than turning off the power is not accepted, or an operation for turning off the power is displayed by displaying that the power is forcibly turned off.

  Note that the image projection function and various setting change functions are not restricted, but the use of the image projection function is permitted, but the various setting change functions may be restricted. That is, you may make it restrict | limit at least 1 which is a more important operation function among several operation functions.

  As described above, according to the present embodiment, when the unique information of the detected access point matches the specific information (specific specific information) of the specific access point stored at the time of initial setting, the password input request Allows the use of the projector's operating functions without performing For this reason, the user can use the projector without feeling inconvenience of inputting a password within a network area where radio waves from a specific access point reach. On the other hand, it is difficult for a third party to construct an access point that has the same specific information as the specific specific information, and furthermore, since the password that the user initially set cannot be known, even if the projector is obtained illegally It becomes difficult to use.

  Next, a projector according to a second embodiment of the invention will be described. The configuration of the projector of this embodiment is the same as that of the first embodiment, and common constituent elements are denoted by the same reference numerals as those of the first embodiment. Further, the initial setting process for activation security is the same as that shown in FIG.

  The activation security process in the present embodiment will be described using the flowchart of FIG. The processing shown in FIG. 5 is executed by a control unit 105 as a computer according to a control program as a computer program.

  The processing from step 501 to step 508 corresponds to the processing from step 401 to step 408 in FIG. Therefore, the description is omitted.

  In step 509, on the condition that the same password as the set password is input in step S506, the control unit 105 stores in the second storage the unique information that does not match the specific unique information for activation security in step 505. Store in the unit 108. At this time, if the unique information is stored for the first time, the number of detections of the unique information is stored as 1. If the unique information stored in the past is the same, the detection count is incremented by one and stored.

  Next, in step 510, the control unit 105 determines whether or not the unique information stored in step 509 is unique information that has been continuously detected a plurality of times from the past. In the case of the unique information whose number of detections is a predetermined multiple times or more, it proceeds to Step 511 on the assumption that there is a new registration candidate access point. If the unique information stored in step 509 is not unique information with a predetermined number of detections or more, or if it is stored as a search object that will be described later, the process proceeds to step 507. In step 507, the control unit 105 permits the use (activation) of all operation functions including the image projection function and various setting change functions of the projector.

  In step 511, the control unit 105 confirms with the user whether or not to register the continuously detected unique information as the specific unique information for activation security. Specifically, through the display on the OSD screen or the display unit, the user is notified that there is continuously detected unique information, and the user is asked whether or not to register it. If the user inputs information for registration through the user operation input unit 109, the process proceeds to step 512, and the unique information is stored in the second storage unit 108 as specific unique information for activation security. When registered, the unique information registered this time from the next activation is also used as the specific unique information for activation security.

  In this function, for example, in the network environment shown in FIG. 6, the specific specific information initially set by the projector 207 is specific information of the access point 201 or the access point 203, and then the access point 205 is added to the network environment. It is effective for. In this case, it is necessary to input a password when communicating with the added access point 205 for the first time. However, when communication with the access point 205 is continuously performed a plurality of times, the unique information of the access point 205 is displayed. It can be newly registered as specific specific information. Then, the projector 207 can be used without a password input request from the next activation after registration. When the unique information of the access point 205 is not registered as the specific unique information, it is desirable to store it in the second storage unit 108 as a non-search target from the next time and not to be a new registration candidate from the next time.

  In the present embodiment, the case where it is determined whether or not to be a new registration candidate based on the number of detections of the same unique information has been described. However, the search is performed at regular intervals, the detected durations are integrated, and the duration time is predetermined. Whether or not to be a new registration candidate may be determined based on whether or not it is longer than the time. Further, when there is a new registration candidate, it may be automatically registered as specific unique information for activation security.

  As described above, according to the present embodiment, when specific information that is not specific specific information is continuously detected, the user is prompted to register or is automatically registered. The projector can be used without inputting.

  In each of the above-described embodiments, the projector has been described as an example. However, similar startup security processing (including initial setting processing) can be applied to any portable electronic device. In each of the above embodiments, the case where the wireless communication device is an access point has been described. However, the wireless communication device may be a device capable of wireless communication such as a personal computer or a printer that operates in an ad hoc mode. Including.

  Each embodiment described above is only a representative example, and various modifications and changes can be made to each embodiment in carrying out the present invention.

  It is possible to provide an electronic apparatus such as an image projection apparatus that can easily use the security function.

105 Control Unit 106 Wireless Communication Unit 108 Second Storage Unit 207 Projector 201, 203, 205 Access Point

Claims (6)

An electronic device having wireless communication means,
Storage means for storing specific information of a specific wireless communication device;
Search means for searching for wireless communication devices existing around the electronic device through the wireless communication means;
Comparison means for comparing the specific information of the wireless communication device detected by the search with the specific information of the specific wireless communication device;
When the specific information of the detected wireless communication device does not match the specific information of the specific wireless communication device, the use of the operation function of the electronic device is restricted, and the specific information of the detected wireless communication device is the specific wireless An electronic device comprising: control means for permitting all use of the operation function when the information matches the unique information of the communication device. The control means includes
When the electronic device is initially set, the user is allowed to set a password for permitting use of the operation function,
After the initial setting, when the detected unique information of the wireless communication device does not match the unique information of the specific wireless communication device, the password input request is made, and the detected unique information of the wireless communication device is The electronic device according to claim 1, wherein when it matches the specific information of a specific wireless communication device, use of the operation function is permitted without requesting input of the password.   The control means stores the unique information of the wireless communication device detected by the search, and stores the unique information when the stored unique information is detected a plurality of times or for a predetermined time. The electronic device according to claim 1 or 2, wherein the user is allowed to select whether or not to store the device-specific information in the storage unit.   4. The image projection apparatus according to claim 1, wherein the electronic apparatus is an image projection apparatus including a light modulation element that modulates light and a projection optical system that projects the modulated light onto a projection surface. The electronic device according to one item.   The operation function restricted in use in the electronic apparatus as the image projection apparatus is a function of projecting an image and a function of changing the setting of the apparatus, or a function of changing the setting of the apparatus. The electronic device according to claim 4. A control program for causing a computer of an electronic device having wireless communication means to perform security processing,
The security process is:
Stores specific information of a specific wireless communication device,
Search for wireless communication devices existing around the electronic device through the wireless communication means,
Compare the unique information of the wireless communication device detected by the search with the unique information of the specific wireless communication device,
When the specific information of the detected wireless communication device does not match the specific information of the specific wireless communication device, the use of the operation function of the electronic device is restricted, and the specific information of the detected wireless communication device is the specific wireless A control program for an electronic device, which permits use of the operation function when it matches the unique information of the communication device.