JP2010165055A - Electronic apparatus, authentication control method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify a complicated labor related with password input by a normal user while preventing improper use. <P>SOLUTION: An electronic apparatus includes: a program memory 28 for storing the presence of reconnection to a commercial power source; and a CPU 26 for determining the presence/absence of the necessity of password input for releasing the lock of an operation according to the storage content of the program memory 28 in a power supply operation, and for releasing the lock of the operation by accepting the input of a correct password when determining that the password input is necessary. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic device, an authentication control method, and a program suitable for a projector device that is used by being fixed to a ceiling or the like with a ceiling mount, for example.

  2. Description of the Related Art Conventionally, a function of locking an operation by setting a password is generally employed as a theft prevention measure in various electronic devices. As an example, in order to prevent unauthorized use of a liquid crystal projector, a projector device capable of locking an operation using a password is considered. (For example, Patent Document 1)

JP 2006-189888 A

  For example, when considering a device that seems to have a relatively low possibility of theft, such as a projector device fixed to the ceiling of a conference room with a ceiling mount, it is not possible to perform authentication with a password each time it is used normally. It is rational and very cumbersome for the user.

  The present invention has been made in view of the above circumstances, and the purpose of the present invention is to simplify troublesome work related to password entry by a legitimate user while preventing unauthorized use. It is an object to provide a possible electronic device, an authentication control method, and a program.

  The invention described in claim 1 is an electronic device that is operated by a commercial power supply in a stationary state, the storage means storing that there is a reconnection to the commercial power supply, and the storage means during the power-on operation. A determination means for determining whether or not a password is required to unlock the operation according to the stored contents, and when the above determination means determines that a password is required, the correct password input is accepted and And an authentication control means for releasing the lock.

  In the invention described in claim 2, in the invention described in claim 1, when the storage means has not been reconnected to the commercial power source, it is determined that the password input is not required by the determination means, It is characterized by the subsequent operation.

  The invention according to claim 3 further comprises detection means for detecting a mechanical coupling state of the apparatus to the deferred place in the invention according to claim 1, wherein the determination means stores the contents stored in the storage means. And determining whether or not it is necessary to input a password for unlocking the operation according to the detection result of the detection means.

  The invention according to claim 4 is an authentication control method for an electronic device that operates with a commercial power supply in a stationary state, wherein the storage step stores that there is a reconnection to the commercial power supply, Enter the correct password when it is determined that password entry is necessary in the judgment process, and the judgment process that judges whether or not the password needs to be unlocked according to the memory contents in the memory process. And an authentication control step for receiving and unlocking the operation.

  The invention according to claim 5 is an authentication control method for an electronic device that operates with a commercial power supply in a stationary state, wherein the storage step stores that there is a reconnection to the commercial power supply, and at the time of power-on operation, Enter the correct password when it is determined that the password input is necessary in the determination step and the determination step for determining whether or not the password input is necessary for unlocking the operation according to the storage contents in the storage step. An authentication control step for accepting and unlocking the operation is executed by a computer.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to simplify the troublesome effort which concerns on the password input by a regular user, preventing unauthorized use.

The block diagram which shows the function structure of the electronic circuit of the data projector apparatus which concerns on one Embodiment of this invention. The flowchart which shows the processing content mainly concerning power supply control which concerns on the embodiment.

  Hereinafter, an embodiment in which the present invention is applied to, for example, a fixed type data projector apparatus that is installed on a ceiling of a conference room using a ceiling mount will be described with reference to the drawings.

FIG. 1 is a block diagram showing a schematic functional configuration of an electronic circuit included in the data projector device 10 according to the embodiment.
Reference numeral 11 denotes an input / output connector unit including, for example, a pin jack (RCA) type video input terminal, a D-sub15 type RGB input terminal, and a USB (Universal Serial Bus) connector.

  Image signals of various standards input from the input / output connector unit 11 are input to an image conversion unit 13 that is also generally referred to as a scaler via an input / output interface (I / F) 12 and a system bus SB.

  The image conversion unit 13 unifies the input image signal into an image signal of a predetermined format suitable for projection, and appropriately stores it in the video RAM 14 which is a buffer memory for display, and then sends it to the projection image processing unit 15.

  At this time, data such as symbols indicating various operation states for OSD (On Screen Display) is also superimposed on the image signal by the video RAM 14 as necessary, and the processed image signal is sent to the projection image processing unit 15.

  The projection image processing unit 15 multiplies a frame rate according to a predetermined format, for example, 60 [frames / second], the number of color component divisions, and the number of display gradations, in accordance with the transmitted image signal. The micromirror element 16, which is a spatial light modulation element (SOM), is driven to display by high-speed time division driving.

  The micromirror element 16 is turned on / off individually at a high speed by tilting angles of a plurality of micromirrors arranged in an array, for example, XGA (horizontal 1024 × vertical 768 dots). Form an image.

  On the other hand, the LED array 17 is configured by regularly arranging an array so that a large number of LEDs emitting light of RGB colors are mixed, and light emission by time division for each color component is reflected on the entire inner surface. The light is condensed by a truncated pyramid-shaped housing 18 on which a mirror is attached, and is converted into a luminous flux having a uniform luminance distribution by an integrator 19, and then totally reflected by a mirror 20 and applied to a micromirror element 16.

  Then, an optical image is formed by the reflected light from the micromirror element 16, and the formed optical image is projected and displayed via a projection lens unit 21 on a screen (not shown) to be projected.

  The LED array 17 is driven and controlled by the R driver 22, the G driver 23, and the B driver 24 in a time-sharing manner, and emits light in RGB primary colors.

  The R driver 22, the G driver 23, and the B driver 24 drive the LED groups of individual color components constituting the LED array 17 with timing and drive current based on a control signal from the projection light processing unit 25.

  The projection light processing unit 25 controls the light emission timing and driving current by the R driver 22, G driver 23, and B driver 24 according to the image data given from the projection image processing unit 15.

  The CPU 26 controls all the operations of the above circuits. The CPU 26 performs control operations in the data projector device 10 using a main memory 27 composed of DRAM and a program memory 28 which is an electrically rewritable nonvolatile memory storing an operation program and various fixed data. Execute.

  Note that the program memory 28 is provided with a flag register and a password storage unit, which will be described later, and holds the contents in a nonvolatile manner even when no power is supplied.

  The CPU 26 executes various projection operations in response to key operation signals from the operation unit 29.

  The operation unit 29 transmits / receives infrared light between a key operation unit provided on the main body of the data projector device 10 and a bidirectional remote controller (hereinafter referred to as bidirectional remote controller) dedicated to the data projector device 10. And a key operation signal based on a key operated by a user using a key operation unit of the main body or a bidirectional remote controller.

  The operation unit 29 is used for both the key operation of the main body of the data projector apparatus 10 and the bidirectional remote controller, for example, a power key for instructing power on / off, a cursor key for instructing each of the up / down / left / right pointer movements, and menu item selection and setting A menu key for performing, a zoom key for changing the projection zoom angle, a focus key for changing the focus position, an AFK (Automatic Focusing & Automatic Keystone Correction) key for instructing automatic keystone correction and automatic focus, and the like.

  In addition, a bidirectional remote controller (not shown) includes a display unit using a monochrome liquid crystal panel with a backlight, for example, and can display character data transmitted via the operation unit 29.

  The CPU 26 is further connected to the audio processing unit 30 and the power supply control unit 31 via the system bus SB.

  The sound processing unit 30 includes a sound source circuit such as a PCM sound source, converts the sound data given during the projection operation into an analog signal, drives the speaker unit 32 to emit a loud sound, or generates a beep sound or the like as necessary.

  The power supply control unit 31 is connected to a commercial AC power supply 33, and rectifies and converts the supplied power into various necessary DC voltages, for example, 1.5 [V], 3.3 [V], and 5.0 [V]. In addition to being supplied to the above circuits after being stabilized, it is possible to supply a minimum amount of power to the CPU 26 even when the power is turned off by storing power in an internal battery (not shown).

Next, the operation of the above embodiment will be described.
FIG. 2 shows processing contents mainly related to power control from the state in which the power of the data projector apparatus 10 is cut off. This process is executed by the CPU 26 reading out the operation program stored in the program memory 28 and developing and storing it in the main memory 27.

  Initially, it is first determined whether or not a key operation for turning on the power is performed by a key operation on the operation unit 29 (step S101). If it is determined that there is no key operation for turning on the power, it is next determined whether or not there is a new connection of the commercial AC power supply 33 via the power control unit 31 (step S102). If it is determined that there is no new connection of the commercial AC power source 33, the process returns to the above step S101 again.

  By repeating the processes in steps S101 and S102 in this way, the power supply is turned on or a new connection of the commercial AC power supply 33 is waited for.

  If there is a new connection of the commercial AC power supply 33, it is determined in step S102, the operation in the CPU 26 is reset, and the operation of the data projector device 10 is set to be locked (step S103). ).

  At the same time, after setting the flag “1” in the flag register F provided in advance in the program memory 28 (step S104), the process returns to the above-described step S101 again.

  If the power is turned on by the key operation of the operation unit 29, it is determined in step S101, and it is determined whether or not the flag “1” is set in the flag register F of the program memory 28 at that time. (Step S105).

  Here, when the flag “1” is set in the flag register F of the program memory 28, the commercial AC power source 33 is once disconnected after the commercial AC power source 33 is disconnected while the power source of the device is cut off until then. 33 is connected.

Therefore, a character string guide message requesting the bidirectional remote control to input a password via the operation unit 29,
"Please enter the password"
The display data is transmitted and displayed (step S106), and the password is input via the operation unit 29 (step S107).
When a password is input, it is determined in step S107, and the input password is compared with a regular password stored in advance in the program memory 28 to determine whether the correct password has been input. (Step S108).

  If the correct password is not input here, the password input is invalidated and the process returns to step S106 again to request the password input again.

  If it is determined in step S108 that the correct password has been input, the operation lock state of the data projector device 10 is immediately released (step S110).

  Thereafter, after shifting to a projection operation process based on an image signal input to the normal input / output connector unit 11 (step S111), a key operation for turning off the power is performed by a key operation on the operation unit 29. It is determined whether or not (step S112).

  If the power-off key operation is not performed, the process returns to step S111 again. Thereafter, the processes in steps S111 and S112 are repeated to wait for the power-off key operation to be performed while continuing the projection operation process. To do.

  Then, when a key operation for turning off the power is performed, it is determined in step S112, a process for turning off the power of the apparatus is executed, and the operation of the data projector apparatus 10 is also locked. After that (step S113), the process returns to step S101 again.

If it is determined in step S105 that the flag “1” is not set in the flag register F of the program memory 28 and is “0”, the commercial power is used while the apparatus is turned off. It is assumed that the connection with the AC power source 33 has not been cut off, and a character string guide message indicating that no password is required to be input to the bidirectional remote controller via the operation unit 29, for example,
"AC password OK"
The display data is transmitted and displayed for a predetermined time (step S109), and the process proceeds to step S110 as it is, and the operation lock state of the data projector apparatus 10 is released.

  That is, according to the present embodiment, once the data projector device 10 that is normally fixedly installed is disconnected from the commercial AC power source, it may be stolen and the user is prompted for a password at the next startup. If the connection to the commercial AC power supply is not interrupted, it is determined that the data projector device 10 has not moved from the fixed installation location, and the password is given to the user at the next startup. Do not prompt for input.

  As described above, according to the present embodiment, it is necessary to input the password for unlocking the operation only when there is a reconnection of the commercial AC power supply 33 and there is a possibility of unauthorized use. As a result, it is possible to simplify troublesome work related to password input by a legitimate user while preventing unauthorized use.

  When a mechanical coupling mechanism for theft prevention represented by Kensington Security Slot (registered trademark) or the like, which is generally widely used, is used, a sensor for detecting the coupling state is also provided, and the flag register F It is also possible to determine whether or not it is necessary to input a password in consideration of the detection signal of the sensor in addition to the contents of. By doing so, it is possible to automatically avoid a situation in which it is necessary to input a password unnecessarily simply due to a temporary power failure or the like.

  In addition, according to the present embodiment, since the chance for the authorized user to input the password is reduced, there is a possibility that the password cannot be remembered when the password needs to be input.

  In this case, for example, the password may be canceled by inquiring the manufacturer and telling the serial number of the product. In this case, of course, it is necessary to confirm whether or not the inquirer is an authorized user.

  Further, the above embodiment has been described for the case where the present invention is applied to a data projector apparatus. However, the present invention is not limited to this, and any fixed electronic device that is installed and used may be a desktop personal computer. The present invention can be similarly applied to any electronic device such as a computer, various audio devices, and home appliances.

  In addition, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention in the implementation stage. Further, the functions executed in the above-described embodiments may be combined as appropriate as possible. The above-described embodiment includes various stages, and various inventions can be extracted by an appropriate combination of a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, if the effect is obtained, a configuration from which the constituent requirements are deleted can be extracted as an invention.

  DESCRIPTION OF SYMBOLS 10 ... Data projector apparatus, 11 ... Input / output connector part, 12 ... Input / output interface 1 (I / F), 13 ... Image conversion part, 14 ... Video RAM, 15 ... Projection image processing part, 16 ... Micromirror element (SOM) , 17 ... LED array, 18 ... housing, 19 ... integrator, 20 ... mirror, 21 ... projection lens unit, 22 ... R driver, 23 ... G driver, 24 ... B driver, 25 ... projection light processing unit, 26 ... CPU 27 ... main memory, 28 ... program memory, 29 ... operation unit, 30 ... audio processing unit, 31 ... power supply control unit, 32 ... speaker unit, 33 ... commercial AC power supply, SB ... system bus.

Claims (5)

An electronic device that operates with a commercial power supply in a stationary state,
Storage means for storing the reconnection to the commercial power source;
A determination unit that determines whether or not a password is required to unlock the operation according to the content stored in the storage unit when the power is turned on;
An electronic apparatus comprising: an authentication control unit that accepts an input of a correct password and unlocks an operation when the determination unit determines that a password input is necessary.   2. The electronic apparatus according to claim 1, wherein when the storage means is not reconnected to the commercial power source, the judgment means judges that the password input is not necessary, and the normal operation is performed thereafter. Further comprising a detecting means for detecting a mechanical coupling state of the apparatus to the deferred location;
2. The determination unit according to claim 1, wherein the determination unit determines whether or not a password is required to unlock the operation in accordance with the contents stored in the storage unit and the detection result of the detection unit. The electronic device described. An authentication control method for an electronic device operating with a commercial power supply in a stationary state,
A storage step of storing that there has been a reconnection to the commercial power source;
At the time of power-on operation, a determination step of determining the necessity of password input for unlocking the operation according to the stored content in the storage step,
An authentication control method comprising: an authentication control step of accepting an input of a correct password and releasing an operation lock when it is determined that a password input is necessary in the determination step. An authentication control method for an electronic device operating with a commercial power supply in a stationary state,
A storage step for storing the reconnection to the commercial power source;
A determination step of determining whether or not there is a need to input a password for unlocking the operation according to the storage content in the storage step at the time of power-on operation;
A program for causing a computer to execute an authentication control step of accepting an input of a correct password and releasing an operation lock when it is determined that a password input is necessary in the determination step.

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