JP6206082B2 - Image processing apparatus, display screen control method, and program - Google Patents

Description

  The present invention relates to an image processing apparatus, a display screen control method, and a program, and more particularly to a technique for controlling a display screen displayed after a user inputs a password.

  An image processing apparatus such as an MFP (Multifunction Peripherals) can store various documents in a storage area called a box. This type of image processing apparatus is generally shared by a plurality of users. For this reason, a user box is set for each user, and each user can store various documents in their own box. It is also possible to set a password in advance.

  Among such image processing apparatuses, conventionally, an apparatus that accepts input of a password by a handwriting input operation by a user is known (for example, Patent Document 1). This conventional technique recognizes a character string based on a locus handwritten by a user and performs password authentication. Therefore, when this conventional technique is applied, when the user operates the image processing apparatus to access a box or document in which a password is set, the password is obtained by performing a handwriting input operation on the operation panel of the image processing apparatus. Can be entered.

JP 2009-171418 A

  A user who uses the image processing apparatus as described above does not always store a highly confidential document in a dedicated box. Even if a user sets a password for a box or document dedicated to the user, the document is not necessarily a highly confidential document. In other words, even a low confidential document that does not cause any problems when viewed by other users may have a password set for such a document.

  On the other hand, when a highly confidential document that is difficult for other users to see is stored in its own box, each user almost certainly sets a password for his / her own box or document. In this case, when a user inputs a preset password for reading a highly confidential document, there is a feeling that other users do not want to know the password. For this reason, the user enters the password with a more careful operation than when entering a password set in a document with low confidentiality, such as performing an input operation while hiding his hand when entering the password.

  In the conventional image processing apparatus, when a password is set in advance in a box or a document stored in the box, when a password that matches the password is input by the user, the document stored in the box is stored. List of documents and preview images of documents specified by the user. The display screen displayed at this time is, for example, uniformly displayed on the entire screen on the display unit of the operation panel.

  However, if the preview image of the document is displayed in full screen on the display unit of the operation panel, the preview image may be visually recognized by other users. In particular, in recent years, the display screen has become larger, wider viewing angles, sharper, etc., and even if the operation panel is viewed from behind the user operating the operation panel, the contents of the preview image are clear. There is a possibility that it will be grasped. If the preview image displayed at this time is a preview image of a document with low confidentiality that may be viewed by other users, there is no particular problem. In that case, there is an advantage that it is easy to grasp the contents of the document by displaying the preview image in full screen.

  However, if the preview image displayed on the entire screen of the operation panel is a highly confidential document that other users do not want to see, the preview image may be viewed by other users. Security problems such as information leaking occur. That is, the conventional image processing apparatus has a problem that information that each user wants to keep secret from other users cannot be displayed in a display form that other users cannot visually recognize.

  Therefore, the present invention has been made to solve the above-mentioned conventional problems, and when displaying a display screen after a user has entered a password, information that the user wants to keep secret from other users An object of the present invention is to provide an image processing apparatus, a display screen control method, and a program that can prevent information from leaking to other users by displaying in a display mode that cannot be visually recognized by other users. Is.

In order to achieve the above object, an invention according to claim 1 is an image processing apparatus, comprising: display means for displaying various display screens; display control means for controlling display screens in the display means; and the display control means. Based on the operation input means for accepting a password input operation by the user while the password input screen is displayed on the display means, and the user input operation mode when the password is input to the operation input means password authentication means for authenticating the password by determining the a concealed intention determining means for determining the level of confidentiality will, whether before Symbol operation input means is input to the password matches the preset strings And the display control means has a user's level of confidentiality determined by the confidentiality determination means. If the authentication fails the password by the password authentication means when at constant level or more, regardless of the level of the user's secret intention when the input operation of the subsequent password is performed, the password is authenticated in the password authentication means a display screen to be displayed on said display unit I accompanied to being, a structure characterized by a display mode with a reduced visibility than the normal display mode.

The invention according to claim 2 is the images processing device, display means for displaying the various display screens, display control means for controlling the display screen on the display unit, a password on said display means by said display control means Based on the operation input means for accepting a password input operation by the user while the input screen is displayed and the user input operation mode when the password is input to the operation input means, the level of the user's confidentiality will be A secret will determination means for determining; and a password authentication means for authenticating the password by determining whether or not a password input to the operation input means matches a preset character string, and the display The control means provides a handwriting input area on the password input screen for display, and the operation input means includes the handwriting input area. When it is possible to accept a password input by a user's handwriting input operation performed on the area, and the confidentiality determination unit has a character size of a password handwritten to the handwriting input area smaller than a predetermined size When the level of the user's confidentiality will be determined to be equal to or higher than a predetermined level, and the display control means, when the level of the user's confidentiality determined by the confidentiality determination means is equal to or higher than the predetermined level, the password authentication means A display screen that is changed from the password input screen and displayed as the password is authenticated in the display mode is displayed on the display unit in a display mode in which the visibility is lower than a normal display mode. It is the structure to do.

The invention according to claim 3 is the image image processing apparatus, and a display means for displaying the various display screens, display control means for controlling the display screen on the display unit, a password on said display means by said display control means Based on the operation input means for accepting a password input operation by the user while the input screen is displayed and the user input operation mode when the password is input to the operation input means, the level of the user's confidentiality will be A secret will determination means for determining; and a password authentication means for authenticating the password by determining whether or not a password input to the operation input means matches a preset character string, and the display The control means provides a handwriting input area on the password input screen for display, and the operation input means includes the handwriting input area. It is possible to accept the input of a password by a user's handwriting input operation performed on the area, and the confidentiality determination unit determines that the password input by handwriting on the handwriting input area is on the inner peripheral edge of the handwriting input area. When it is input, it is determined that the level of the confidentiality of the user is equal to or higher than a predetermined level, and the display control unit is when the level of the confidentiality of the user determined by the confidentiality determination unit is equal to or higher than a predetermined level, As the password is authenticated by the password authenticating means, the display means is displayed on the display means in a display form in which the visibility is lower than that of a normal display form. It is the structure characterized by this.

According to a fourth aspect of the present invention, in the image processing apparatus according to the second or third aspect , the display control unit is configured such that the level of the user's confidentiality determined by the confidentiality determination unit is a predetermined level or more. And a display screen that is displayed by transitioning from the password input screen when the password is authenticated by the password authentication means, and is displayed at a position where the password is handwritten in the handwriting input area. It is.

The invention according to claim 5 is the images processing device, display means for displaying the various display screens, display control means for controlling the display screen on the display unit, a password on said display means by said display control means Based on the operation input means for accepting a password input operation by the user while the input screen is displayed and the user input operation mode when the password is input to the operation input means, the level of the user's confidentiality will be A secret will determination means for determining; and a password authentication means for authenticating the password by determining whether or not a password input to the operation input means matches a preset character string, and the display When the control means provides and displays a keyboard image in which a plurality of keys are arranged in a predetermined arrangement on the password input screen, In addition, the display size of the keyboard image can be changed based on a user's operation on the operation input means, and the confidentiality determination means can determine whether the password is displayed in a state where the display size of the keyboard image is smaller than a predetermined size. Is input, it is determined that the level of the confidentiality of the user is equal to or higher than a predetermined level, and the display control means is when the level of the confidentiality of the user determined by the confidentiality determination means is equal to or higher than the predetermined level When the password is authenticated by the password authentication means, the display screen displayed by transitioning from the password input screen is displayed on the display means in a display mode in which the visibility is lower than the normal display mode. It is the structure characterized by making it carry out.

The invention according to claim 6 is the image picture processor, and a display means for displaying the various display screens, display control means for controlling the display screen on the display unit, a password on said display means by said display control means Based on the operation input means for accepting a password input operation by the user while the input screen is displayed and the user input operation mode when the password is input to the operation input means, the level of the user's confidentiality will be A secret will determination means for determining; and a password authentication means for authenticating the password by determining whether or not a password input to the operation input means matches a preset character string, and the display When the control means provides and displays a keyboard image in which a plurality of keys are arranged in a predetermined arrangement on the password input screen, In addition, it is possible to change the display position of the keyboard image within the display range of the display means based on the user's operation on the operation input means. When the password is input while being located at the peripheral edge of the user, it is determined that the level of the confidentiality of the user is equal to or higher than a predetermined level, and the display control unit is determined by the confidentiality determination unit If the level of the will of secrecy is equal to or higher than a predetermined level, the password authentication means is adapted to authenticate the password, and the display screen displayed by transitioning from the password input screen is more visible than the normal display mode. The display is displayed on the display unit in a lowered display mode .

The invention according to claim 7 is the image processing apparatus according to claim 5 or 6 , wherein the display control means is configured such that the level of the user's confidentiality determined by the confidentiality determination means is equal to or higher than a predetermined level. The password authentication means displays a display screen that is shifted from the password input screen and displayed at the position where the keyboard image was displayed when the password is authenticated.

The invention according to claim 8 is the images processing device, display means for displaying the various display screens, display control means for controlling the display screen on the display unit, a password on said display means by said display control means Based on the operation input means for accepting a password input operation by the user while the input screen is displayed and the user input operation mode when the password is input to the operation input means, the level of the user's confidentiality will be A secret will determination means for determining; and a password authentication means for authenticating the password by determining whether or not a password input to the operation input means matches a preset character string, and the display When the control means provides and displays a keyboard image in which a plurality of keys are arranged in a predetermined arrangement on the password input screen, In addition, it is possible to change a plurality of keys included in the keyboard image to an arrangement different from the predetermined arrangement based on a user's operation on the operation input means, and the confidentiality determination means is added to the keyboard image. When a password is input in a state where a plurality of keys included are changed to an arrangement different from the predetermined arrangement, it is determined that a user's level of confidentiality is greater than or equal to a predetermined level, and the display control means When the level of the confidentiality of the user determined by the will determination unit is a predetermined level or more, a display screen that is displayed by transitioning from the password input screen in accordance with the password being authenticated by the password authentication unit is usually displayed. structure, characterized in that to be displayed on the display unit in the display mode with a reduced visibility than the display form It is.

The invention according to claim 9 is the images processing device, display means for displaying the various display screens, display control means for controlling the display screen on the display unit, a password on said display means by said display control means Based on the operation input means for accepting a password input operation by the user while the input screen is displayed and the user input operation mode when the password is input to the operation input means, the level of the user's confidentiality will be A secret will determination means for determining; and a password authentication means for authenticating the password by determining whether or not a password input to the operation input means matches a preset character string, and the display The control means includes a keyboard image in which a plurality of keys are arranged in a predetermined arrangement on the password input screen, and a user. A password display field for displaying an input password is provided and displayed, and the password display field can be switched to non-display based on a user's operation on the operation input unit. , When a password is input in a state where the password display field included in the password input screen is switched to non-display, it is determined that the level of confidentiality of the user is a predetermined level or more, the display control means, When the level of the user's confidentiality determination determined by the confidentiality determination unit is equal to or higher than a predetermined level, a display screen that is shifted from the password input screen and displayed when the password is authenticated by the password authentication unit In the display mode, the visibility is lower than the normal display mode. A construction which is characterized in that to be displayed in.

The invention according to claim 10 is the image image processing apparatus, and a display means for displaying the various display screens, display control means for controlling the display screen on the display unit, a password on said display means by said display control means Based on the operation input means for accepting a password input operation by the user while the input screen is displayed and the user input operation mode when the password is input to the operation input means, the level of the user's confidentiality will be A secret will determination unit for determining, a password authentication unit for authenticating the password by determining whether or not the password input to the operation input unit matches a preset character string, and comprising a sensor and capable of detecting the size of objects located in the vicinity of the surface, the concealment intention determining means, said password When a password input operation is performed by the user while the password input screen is displayed, an object of a predetermined size or more is detected by the sensor, and the level of the user's confidentiality is equal to or higher than a predetermined level. And when the level of the user's confidentiality determination determined by the confidentiality determination unit is equal to or higher than a predetermined level, the display control unit determines that the password is authenticated by the password authentication unit, and the password input screen A display screen that is displayed after being changed from the display mode is displayed on the display unit in a display mode in which the visibility is lower than the normal display mode .

According to an eleventh aspect of the present invention, in the image processing apparatus according to the tenth aspect , the display control means is configured such that when the level of the user's confidentiality determined by the confidentiality determination means is a predetermined level or more, the password In accordance with the configuration in which the password is authenticated by the authentication unit, a display screen that is changed from the password input screen and displayed is displayed at a position where an object of a predetermined size or more is detected by the sensor. is there.
The invention according to claim 12 is the image processing apparatus according to any one of claims 1 to 11, further comprising security level determination means for determining a security level of a password input to the operation input means, wherein the display The control means, when the level of the user's confidentiality determined by the confidentiality determination means is a predetermined level or higher, or when the security level of the password determined by the security level determination means is higher than the predetermined level, As the password is authenticated by the password authenticating means, the display means is displayed on the display means in a display form in which the visibility is lower than that of a normal display form. It is the structure characterized by this.
According to a thirteenth aspect of the present invention, in the image processing apparatus according to the twelfth aspect, when the security level determination means is a password input to the operation input means is a character string having a predetermined number of characters or more, It is the structure characterized by determining with a level being more than a predetermined level.
According to a fourteenth aspect of the present invention, in the image processing device according to any one of the first to thirteenth aspects, the operation input means can accept a user input operation performed on a display screen of the display means. It is the structure characterized by this.

  According to a fifteenth aspect of the present invention, in the image processing apparatus according to any one of the first to fourteenth aspects, the display control means is a display screen that is displayed by transitioning from the password input screen rather than a normal display mode. When a display screen having a display mode with reduced visibility is generated, a display screen having a size smaller than a normal display size is generated.

  According to a sixteenth aspect of the present invention, in the image processing device according to any one of the first to fifteenth aspects, the display control means is designated by a user when generating a display screen to be displayed by transitioning from the password input screen. A display screen including a preview image of the document is generated.

  The invention according to claim 17 is the image processing apparatus according to any one of claims 1 to 15, wherein the display control means generates a plurality of information when generating a display screen to be displayed by transitioning from the password input screen. The display screen including the list display is generated.

The invention according to claim 18 is a display screen control method for controlling a display screen displayed on the display means in an image processing apparatus having a display means, and (a) displaying a password input screen on the display means; (B) a step of accepting a password input operation by the user while the password input screen is displayed on the display means; and (c) a user input operation mode when the password input operation by the user is performed. based, determining a user's level of confidentiality will the steps of authenticating the password by determining whether matching string password inputted is preset by (d) user, ( e) As the password is authenticated in step (d), the display screen on the display means is changed. Includes a step, wherein the step (e), when the level of the user's confidential intention is determined at the step (c) fails to authenticate the password in step (d) when a predetermined level or higher , regardless of the level of the user's secret intention when the input operation of the subsequent password is performed, a display screen password in the step (d) displayed on the display unit I accompanied to be authenticated, usually It is the structure characterized by setting it as the display mode which lowered visibility rather than this display mode.
The invention according to claim 19 is a display screen control method for controlling a display screen displayed on the display means in an image processing apparatus having a display means, and (a) displaying a password input screen on the display means; (B) a step of accepting a password input operation by the user while the password input screen is displayed on the display means; and (c) a user input operation mode when the password input operation by the user is performed. (D) authenticating the password by determining whether or not the password entered by the user matches a preset character string; and e) As the password is authenticated in step (d), the display screen on the display means is changed. The step (a) is provided by displaying a handwriting input area on the password input screen, and the step (b) is a user's handwriting input operation performed on the handwriting input area. It is possible to accept password input, and the step (c) is such that the level of the user's confidentiality is greater than or equal to a predetermined level when the character size of the password handwritten to the handwriting input area is smaller than a predetermined size. In step (e), when the level of user confidentiality determined in step (c) is equal to or higher than a predetermined level, the step (e) is accompanied by the password being authenticated in step (d), The display screen that is changed from the password input screen and displayed is displayed on the display means in a display mode in which the visibility is lower than a normal display mode. It is the structure characterized by making it.
The invention according to claim 20 is a display screen control method for controlling a display screen to be displayed on the display means in an image processing apparatus having a display means, comprising: (a) displaying a password input screen on the display means; (B) a step of accepting a password input operation by the user while the password input screen is displayed on the display means; and (c) a user input operation mode when the password input operation by the user is performed. (D) authenticating the password by determining whether or not the password entered by the user matches a preset character string; and e) As the password is authenticated in step (d), the display screen on the display means is changed. The step (a) is provided by displaying a handwriting input area on the password input screen, and the step (b) is a user's handwriting input operation performed on the handwriting input area. The input of a password can be accepted, and the step (c) includes a step in which the level of confidentiality of the user is determined when a password input by handwriting is input to the inner peripheral edge of the handwriting input area. It is determined that the level is equal to or higher than a predetermined level, and the step (e) authenticates the password in the step (d) when the level of confidentiality of the user determined in the step (c) is equal to or higher than the predetermined level. Along with this, the display means for changing the display screen from the password input screen to a display mode in which the visibility is lower than the normal display mode is used. It is the structure characterized by making it display on.
The invention according to claim 21 is a display screen control method for controlling a display screen displayed on the display means in an image processing apparatus having a display means, and (a) displaying a password input screen on the display means; (B) a step of accepting a password input operation by the user while the password input screen is displayed on the display means; and (c) a user input operation mode when the password input operation by the user is performed. (D) authenticating the password by determining whether or not the password entered by the user matches a preset character string; and e) As the password is authenticated in step (d), the display screen on the display means is changed. In step (a), a keyboard image in which a plurality of keys are arranged in a predetermined arrangement is provided and displayed on the password input screen, and the display size of the keyboard image is set based on a user operation. The step (c) determines that the level of the user's confidentiality is greater than or equal to a predetermined level when a password is input in a state where the display size of the keyboard image is smaller than a predetermined size. In the step (e), when the level of the user's confidentiality determined in the step (c) is equal to or higher than a predetermined level, the password input is performed when the password is authenticated in the step (d). A display screen that is displayed by transitioning from the screen is displayed on the display means in a display mode in which visibility is lower than that in a normal display mode. It is the structure characterized by this.
The invention according to claim 22 is a display screen control method for controlling a display screen displayed on the display means in an image processing apparatus having a display means, and (a) displaying a password input screen on the display means; (B) a step of accepting a password input operation by the user while the password input screen is displayed on the display means; and (c) a user input operation mode when the password input operation by the user is performed. (D) authenticating the password by determining whether or not the password entered by the user matches a preset character string; and e) As the password is authenticated in step (d), the display screen on the display means is changed. The step (a) includes providing and displaying a keyboard image in which a plurality of keys are arranged in a predetermined arrangement on the password input screen and displaying the display position of the keyboard image based on a user operation. The step (c) can be changed within the display range of the display means, and the step (c) is performed when a password is input in a state where the keyboard image is located at a peripheral portion in the display range. It is determined that the level of confidentiality will be greater than or equal to a predetermined level.If the level of confidentiality of the user determined in step (c) is greater than or equal to a predetermined level, the step (e) As the password is authenticated, the display screen that is shifted from the password input screen and displayed is changed to a display mode in which the visibility is lower than the normal display mode Then, the display means displays it.
The invention according to claim 23 is a display screen control method for controlling a display screen displayed on the display means in an image processing apparatus having a display means, and (a) displaying a password input screen on the display means; (B) a step of accepting a password input operation by the user while the password input screen is displayed on the display means; and (c) a user input operation mode when the password input operation by the user is performed. (D) authenticating the password by determining whether or not the password entered by the user matches a preset character string; and e) As the password is authenticated in step (d), the display screen on the display means is changed. The step (a) includes providing and displaying a keyboard image in which a plurality of keys are arranged in a predetermined arrangement on the password input screen, and a plurality of steps included in the keyboard image based on a user operation. Can be changed to an arrangement different from the predetermined arrangement, and the step (c) is performed in a state where a plurality of keys included in the keyboard image are changed to an arrangement different from the predetermined arrangement. Is input, it is determined that the level of the user's confidentiality will be greater than or equal to a predetermined level, and in step (e), the level of the user's confidentiality will determined in step (c) is greater than or equal to the predetermined level. If the password is authenticated in the step (d), the display screen displayed by transitioning from the password input screen is a normal display mode. In this configuration, the display means displays the display mode with a lower visibility.
The invention according to claim 24 is a display screen control method for controlling a display screen to be displayed on the display means in an image processing apparatus having a display means, comprising: (a) displaying a password input screen on the display means; (B) a step of accepting a password input operation by the user while the password input screen is displayed on the display means; and (c) a user input operation mode when the password input operation by the user is performed. (D) authenticating the password by determining whether or not the password entered by the user matches a preset character string; and e) As the password is authenticated in step (d), the display screen on the display means is changed. The step (a) is displayed by providing a keyboard image in which a plurality of keys are arranged in a predetermined arrangement and a password display field for displaying a password input by the user on the password input screen. In addition, the password display field can be switched to non-display based on a user operation, and the step (c) is a state in which the password display field included in the password input screen is switched to non-display. When the password is entered in step (e), the level of the user's confidentiality will be determined to be equal to or higher than the predetermined level. If the password is authenticated in the step (d), a transition is made from the password input screen. A display screen to be displayed is displayed on the display unit in a display mode in which the visibility is lower than that of a normal display mode.
The invention according to claim 25 is an image processing apparatus comprising: a display unit; an operation input unit that is operated by a user; and a sensor that can detect a size of an object located near a surface of the operation input unit. A display screen control method for controlling a display screen displayed on a display means, comprising: (a) displaying a password input screen on the display means; and (b) displaying the password input screen on the display means. Receiving a password input operation by the user in a state; (c) determining a user's level of confidentiality based on the user input operation mode when the user performs a password input operation;
(d) authenticating the password by determining whether the password entered by the user matches a preset character string;
(e) a step of transitioning a display screen in the display means when the password is authenticated in the step (d), and the step (c) displays the password input screen. In the state, when a password input operation is performed by the user, when an object of a predetermined size or more is detected by the sensor, it is determined that the level of the user's confidentiality is higher than a predetermined level, and the step (e) When the level of the user's confidentiality determined in the step (c) is a predetermined level or higher, the password is authenticated in the step (d), and the transition is made from the password input screen for display. The display screen is displayed on the display unit in a display mode in which visibility is lower than a normal display mode. is there.
The invention according to claim 26 is the display screen control method according to any one of claims 18 to 25, further comprising: (f) determining a security level of the password input in step (b). In step (e), when the level of user confidentiality determined in step (c) is a predetermined level or higher, or the security level of the password determined in step (f) is higher than a predetermined level. When the password is authenticated in the step (d), the display screen to be displayed by making a transition from the password input screen is set to a display mode in which visibility is lower than a normal display mode. This is characterized by being displayed on the display means.

An invention according to claim 27 is a program executed in an image processing apparatus having display means, and causes the image processing apparatus to execute the display screen control method according to any of claims 18 to 26. This is a characteristic configuration.

  According to the present invention, when displaying a display screen after a password is input by a user, information that the user wants to keep secret from other users is displayed in a display mode that cannot be visually recognized by other users. Therefore, it is possible to prevent information from leaking to other users.

It is a figure which shows the external appearance structure of an image processing apparatus. It is a block diagram which shows an example of the hardware constitutions of an image processing apparatus. It is a block diagram which shows an example of a function structure of an operation panel and a control part. It is a figure which shows an example of the display screen displayed on a display part by a display control part. It is a figure explaining the judgment processing concept of a user's secrecy will level by a secrecy will judgment part. It is a figure which shows an example of the determination information referred in order for a display control part to determine the display mode of a display screen. It is a figure which shows a screen transition in case the display screen after a password input is enlargedly displayed. It is a figure which shows a screen transition in case the display screen after a password input is normally displayed. It is a figure which shows a screen transition in case the display screen after a password input is displayed secretly. It is a figure which shows a screen transition when a user inputs a password with a small character size on the right side of a handwriting input area. It is a flowchart which shows an example of the process sequence performed in the control part of an image processing apparatus. It is a flowchart which shows an example of the detailed process sequence of a confidentiality determination process. It is a flowchart which shows an example of the detailed process sequence of a security level determination process. It is a flowchart which shows an example of the detailed process sequence of a display mode determination process. It is a figure which shows the 1 aspect which performs the input operation of a password, while a user hides a hand. It is a figure which shows an example of the detection signal output from an object detection sensor. It is a figure which shows an example of the password input screen displayed in 2nd Embodiment. It is a figure which shows the example of a display screen when the expansion key and reduction key of a password input screen are operated. It is a figure which shows the example of a display screen when the non-display key and random key of a password input screen are operated. It is a flowchart which shows an example of the detailed process sequence of the secrecy will determination process in 2nd Embodiment. It is a figure which shows an example of the display screen displayed when a user performs login operation with respect to an image processing apparatus. It is a figure which shows an example of the display screen displayed when a user performs operation with respect to a box list. It is a figure which shows an example of the display screen displayed when a user inputs a password with a comparatively small character size when performing login operation.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the embodiments described below, members that are common to each other are denoted by the same reference numerals, and redundant descriptions thereof are omitted.

(First embodiment)
FIG. 1 is a diagram showing an external configuration of an image processing apparatus 1 according to the first embodiment of the present invention. An image processing apparatus 1 shown in FIG. 1 is configured by an MFP or the like, has a scan function, a print function, a box function, and the like, and executes a job designated by a user.

  The image processing apparatus 1 includes an image reading unit 2 and an automatic document conveying unit 3 that are linked to each other when executing a scan job using a scan function. The automatic document feeder 3 automatically and continuously conveys documents set by the user on the document placement unit 3a one by one. The image reading unit 2 generates image data by optically reading an image when the document automatically conveyed by the automatic document conveying unit 3 passes a predetermined reading position.

  In addition, the image processing apparatus 1 includes an image forming unit 4 and a paper feeding unit 5 that are activated when a print job with a print function is executed. The paper feed unit 5 automatically and continuously conveys recording sheets such as printing paper stocked in advance one by one. The image forming unit 4 records, on a predetermined recording sheet, an image based on a document received via a network such as a local area network (LAN) or an image based on a document stored in a box. Print output is performed by transferring when passing the position. The recording sheet on which the image has been transferred by the image forming unit 4 is subjected to a fixing process, and is then discharged from a discharge port 6 provided at the top of the image forming unit 4 to the recording sheet placing unit 7.

  Furthermore, the image processing apparatus 1 includes an operation panel 10 serving as a user interface when a user performs various operations on the front side of the apparatus main body. The operation panel 10 includes a display unit 11 that displays various types of information and an operation unit 12 that is operated by a user. Accordingly, the user performs an operation on the operation unit 12 while visually recognizing information displayed on the display unit 11, thereby performing a login operation, a box specifying operation, a document specifying operation, and an image processing device for the image processing apparatus 1. 1 can be used for setting a job to be executed.

  The operation panel 10 can be attached and detached with a keypad 16 as an optional component with respect to the right side surface thereof. The keypad 16 is for inputting numbers from 0 to 9, for example, predetermined symbols, and a plurality of push button keys corresponding to the numbers and symbols are arranged. Therefore, when the keypad 16 is attached to the operation panel 10, the user can input numbers and symbols by operating push button keys provided on the keypad 16.

  Further, the image processing apparatus 1 can be attached to and detached from the front side of the apparatus main body by using an object detection sensor 17 capable of detecting an object located near the surface of the operation panel 10 as an optional component. The object detection sensor 17 includes a light source and a light receiving unit that are arranged one-dimensionally in parallel with the display unit 11 so as to cover the display range of the display unit 11 provided on the operation panel 10, for example. The object located near the surface of the display unit 11 is detected by detecting the reflected light from the object located near the surface of 11. Such an object detection sensor 17 can detect the position and size (length) of an object when the object exists near the surface of the operation panel 10.

  FIG. 2 is a block diagram illustrating an example of a hardware configuration of the image processing apparatus 1. The image processing apparatus 1 includes a control unit 20, a network interface 25, an auxiliary storage device 26, in addition to the image reading unit 2, the automatic document conveyance unit 3, the image forming unit 4, the paper feeding unit 5, and the operation panel 10 described above. Each of these units can input / output data to / from each other via the data bus 19. FIG. 2 shows a configuration example in which a keypad 16 and an object detection sensor 17 which are optional parts are mounted. The keypad 16 is connected to the operation unit 12 of the operation panel 10, and the object detection sensor 17 is a data bus. 19 is connected.

  The network interface 25 is for connecting the image processing apparatus 1 to a network such as a LAN. The network interface 25 communicates with other information devices connected to the network by wire or wireless.

  The auxiliary storage device 26 is a non-volatile storage unit configured by, for example, a hard disk drive (HDD). The auxiliary storage device 26 is provided with a box 27 for storing document data (hereinafter simply referred to as a document) 28 composed of various image data. That is, the box 27 is a storage area for storing the document 28. Such a box 27 is provided for each user who uses the image processing apparatus 1, and can be freely created by an individual user who uses the image processing apparatus 1, for example. Each user can store various documents 28 in the box 27 dedicated to the user, and set a password in advance for the box 27 dedicated to the user and the document 28 stored in the box 27. It is also possible to leave.

  The control unit 20 includes a CPU 20a, a RAM 20b, and a ROM 20c. The CPU 20a reads and executes the program 9 stored in advance in the ROM 20c, thereby controlling the operation of each unit. The RAM 20b is a memory for storing temporary data and the like when the CPU 20a executes processing based on the program 9. Such a control unit 20 controls execution of a job in the image processing apparatus 1 and controls a display screen displayed on the display unit 11 based on the user's operation when the user performs an operation on the operation panel 10. To do. In particular, in the present embodiment, when the user specifies the document 28 for which a password is set by operating the operation panel 10 as a job execution target, the control unit 20 includes the password set for the document 28, And the display mode of the display screen displayed on the display part 11 after password authentication is controlled based on the input operation mode when a user performs the input operation of the password. Hereinafter, the image processing apparatus 1 will be described in more detail.

  FIG. 3 is a block diagram illustrating an example of functional configurations of the operation panel 10 and the control unit 20. As shown in FIG. 3, the display screen displayed on the display unit 11 of the operation panel 10 is controlled by the control unit 20. Such a display part 11 is comprised by the color liquid crystal display etc. which have a backlight, for example.

  The operation unit 12 of the operation panel 10 includes a touch sensor 12a, a hard key 12b, and an operation input unit 12c. The touch sensor 12 a is a sheet-like sensor arranged on the display screen of the display unit 11, and detects a touch operation or a handwriting input operation performed by the user on the display screen of the display unit 11. The hard key 12b is a push button key arranged around the display screen of the display unit 11, and includes, for example, a start key for instructing start of job execution. The operation input unit 12c receives a user input operation performed on the touch sensor 12a and the hard key 12b. The operation input unit 12 c can also accept a user input operation on the keypad 16 when the keypad 16 is attached to the operation panel 10. For example, when the password input screen is displayed on the display unit 11, the operation input unit 12 c accepts a password input operation by the user. When the operation input unit 12c receives an input operation by the user, the operation input unit 12c outputs information based on the operation to the control unit 20.

  On the other hand, the control unit 20 functions as a display control unit 30, a confidentiality determination unit 31, a security level determination unit 32, a password authentication unit 33, and a job control unit 34 when the CPU 20 a executes the program 9.

  The display control unit 30 controls the display screen on the display unit 11. For example, when the operation input unit 12c receives an input operation by the user, the display control unit 30 switches the display screen of the display unit 11 based on the operation. The display control unit 30 includes a display screen generation unit 35. When an operation by the user is accepted, the display screen generation unit 35 generates a display screen reflecting the operation. Then, the display control unit 30 updates the display screen of the display unit 11 by outputting the display screen generated by the display screen generation unit 35 to the display unit 11.

  Further, the display screen generation unit 35 has a preview image generation unit 36. The preview image generation unit 36 is a processing unit that reads the document 28 stored in the box 27 of the auxiliary storage device 26 and generates a preview image of the document 28. Therefore, the display control unit 30 can display a display screen including the preview image generated by the preview image generation unit 36 on the display unit 11.

  Such a display control unit 30 displays a password input screen on the display unit 11 when the user designates a box 27 or a document 28 in which a password 29 is set in advance. When the password that the user inputs on the password input screen matches the character string of the password 29 preset in the box 27 or the document 28, the display control unit 30 displays the password on the display screen of the display unit 11 as the password input. Control to transition from the screen to the next display screen after password authentication.

  The confidentiality determination unit 31 is a process for determining the level of confidentiality of the user based on the input operation mode of the user when the password input operation is performed by the user while the password input screen is displayed on the display unit 11. Part. For example, there are three levels of the user's secret will level: a high level, a medium level, and a low level. The secret will determination unit 31 determines the input operation mode by which the user has entered the password, thereby determining the user The secret willing level is specified as a high level, a medium level, or a low level.

  The security level determination unit 32 is a processing unit that determines the security level of the password input by the user. There are also three security levels, for example, a high level, a medium level, and a low level. The security level determination unit 32 determines the security level according to the complexity of the password input by the user. That is, the password set in advance in the highly confidential document 28 that is difficult for other users to see is the password set in the less confidential document 28 that may be viewed by other users. Since it is generally composed of a more complicated character string, the security level determination unit 32 determines the security level according to the complexity of such a password.

  For example, the security level determination unit 32 determines whether the security level is a high level, a medium level, or a low level according to the number of characters of a character string that constitutes a password input by the user. For example, if the password character string is 12 characters or more, it is determined that the security level is high, and if it is 4 characters or more and less than 12 characters, it is determined that the security level is medium. When the password character string is less than 4 characters, the security level determination unit 32 determines that the security level is low.

  However, the security level determination unit 32 does not necessarily have to determine the security level according to the number of characters in the character string constituting the password. For example, the security level may be determined according to the number of character types included in the password character string. In this case, if the password character string includes, for example, three types of characters such as numbers, alphabets, and symbols, it is determined that the security level is high, and if two types of characters are included, the medium is determined. Judged to be level. If the password is composed of only one type of character, it is determined that the security level is low.

  In addition to the above, the security level determination unit 32 may determine the security level according to both the number of characters in the password and the number of character types included in the password. The security level determination unit 32 may determine the security level based on a password 29 set in advance in the box 27 or the document 28 instead of the password input by the user.

  When the password is input by the user, the password authentication unit 33 determines whether or not the input password matches the character string of the password 29 preset in the box 27 or the document 28. It is a processing unit for authenticating the received password. In this password authentication, if the password entered by the user matches the character string of the password 29 preset in the box 27 or the document 28, the authentication is successful, and if it does not match, the authentication fails.

  The job control unit 34 is a processing unit that controls execution of a job designated by the user. For example, in the case of a scan job, the job control unit 34 controls the reading operation of the document set by the user by linking the image reading unit 2 and the automatic document conveying unit 3 described above, and the image data obtained thereby. (Document) is stored in the box 27 designated by the user. In the case of a print job, the job control unit 34 reads the document 28 designated by the user, and links the image forming unit 4 and the paper feeding unit 5 with each other based on the document 28 to thereby designate the designated document. 28 prints out.

  In the configuration described above, the display control unit 30 authenticates the password input by the user in the password authentication unit 33, and transitions the display screen of the display unit 11 from the password input screen to the next display screen after password authentication. In this case, the display mode of the next display screen is changed based on both the level of the user's confidentiality determined by the confidentiality determination unit 31 and the security level of the password determined by the security level determination unit 32. This will be described in detail below.

  FIG. 4 is a diagram illustrating an example of a display screen displayed on the display unit 11 by the display control unit 30. For example, when the operation panel 10 is operated by a user who has logged into the image processing apparatus 1 and one box 27 for which a password is not set is specified from among a plurality of boxes accessible by the user, display control is performed. The unit 30 displays a list display screen G1 as shown in FIG. The list display screen G1 includes a file list of the documents 28 stored in the box 27 designated by the user. FIG. 4A illustrates a case where a plurality of documents 28 are stored in the box 27 designated by the user. Since the file list included in the list display screen G1 displays the file names and file formats of the documents 28 in a list format, the contents of each document 28 cannot be confirmed for the user. Therefore, the user can preview the selected document 28 by selecting the document 28 included in the file list.

  For example, when the document 28 of “FILE4” is selected by the user and the password 29 is set in the document 28, the display control unit 30 displays the display screen of the display unit 11 as shown in FIG. The screen is updated and the password input screen G2 is displayed. 4B shows an example in which the password input screen G2 is displayed so as to overlap the lower half of the list display screen G1, the present invention is not limited to this, and the password input screen G2 is displayed on the display unit. 11 may be displayed on the entire screen. This password input screen G2 has a handwriting input area R1 in which a user can input a password by performing handwriting input, and an OK button B1 that is operated when the user completes the password input operation. . Therefore, the user can input the password for performing the preview display of the document 28 by inputting the password in the handwriting input area R1 by handwriting.

  When a password is handwritten in the handwriting input area R1 by the user, the operation input unit 12c identifies a character string based on the locus of the touch position detected by the touch sensor 12a and recognizes the input password. The operation input unit 12c recognizes the input position and character size of the password input by handwriting by the user. Then, the operation input unit 12 c outputs operation information including a password, an input position, and a character size input by the user to the control unit 20.

  The secret will determination unit 31 is based on the size of the handwriting input area R1 of the password input screen G2 displayed on the display unit 11 by the display control unit 30 and the character size of the password handwritten by the user in the handwriting input area R1. Then, it is determined whether the confidentiality level of the user is a high level, a medium level, or a low level. For example, when the document 28 to be preview-displayed is a highly confidential document that is difficult to be seen by other users, when the user inputs a password by handwriting in the handwriting input area R1, the password is given to the other user. Therefore, a password is input with a relatively small character size in the handwriting input area R1 while hiding the hand. On the other hand, when the document 28 to be preview-displayed is a document with low confidentiality that may be viewed by other users, when the user inputs a password by handwriting in the handwriting input area R1, password authentication is performed once. Therefore, a password is entered with a relatively large character size in the handwriting input area R1. Therefore, the confidentiality determination unit 31 calculates, for example, the character size ratio of the input password with respect to the size of the handwriting input area R1, and according to the character size ratio, the confidentiality determination level of the user is high level, medium level, and low level. Which level is determined.

  FIG. 5 is a diagram for explaining a determination process concept of a user's confidentiality will level by the confidentiality determination unit 31. For example, as shown in FIG. 5A, when the user inputs a password by hand with a relatively small character size with respect to the area Ra in the handwriting input area R1, the confidentiality determination unit 31 uses the characters of the password input by handwriting. It is determined that the size ratio is smaller than the first value, and the user's confidentiality level is determined as a high level. Further, as shown in FIG. 5B, when the user inputs a password in a medium character size with respect to the region Rb in the handwriting input region R1, the confidentiality determination unit 31 uses the characters of the password input by handwriting. The size ratio is determined to be greater than or equal to the first value and less than or equal to the second value, and the user's confidentiality level is determined as the middle level. Furthermore, as shown in FIG. 5C, when the user inputs a password by hand with a relatively large character size in the region Rc in the handwriting input region R1, the confidentiality determination unit 31 uses the characters of the password input by handwriting. It is determined that the size ratio exceeds the second value, and the confidentiality level of the user is determined as a low level. Then, confidentiality determination unit 31 outputs the determination result to display control unit 30.

  As described above, the confidentiality determination unit 31 of the present embodiment determines the confidentiality determination level of the user according to the character size ratio of the password input by handwriting. However, there are other methods for determining the user's level of confidentiality. For example, when the user enters a password and the psychology that the user does not want the password to be known to other users works, the user is not in the center of the handwriting input area R1 but in the inner peripheral edge of the handwriting input area R1. You may enter your password in handwriting. Therefore, the secret will determination unit 31 may determine the user's secret will level as a high level when a password handwritten by the user is input to the inner peripheral edge of the handwriting input region R1. In this case, regardless of the character size ratio of the password input by handwriting by the user, the user's confidentiality willingness level can be determined as a high level depending on the position input by handwriting, so the character size ratio need not be calculated. .

  The security level determination unit 32 determines whether the security level of the password is a high level, a medium level, or a low level based on the character string of the password recognized by the operation input unit 12c. Then, the security level determination unit 32 outputs the determination result to the display control unit 30.

  Further, the password authentication unit 33 performs password authentication based on the password recognized by the operation input unit 12 c and outputs the authentication result to the display control unit 30. Then, the display control unit 30 sets the user's confidentiality determination level determined by the confidentiality determination unit 31 and the password security level determined by the security level determination unit 32 on the condition that the password authentication result is authentication success. The display mode for displaying the preview display screen of the document 28 is determined based on both.

  FIG. 6 is a diagram illustrating an example of the determination information TB1 that the display control unit 30 refers to in order to determine the display mode of the display screen. As shown in FIG. 6, when the security level of the password is high, the display control unit 30 determines the display mode of the display screen after the password is input by the user as the confidential display. The display control unit 30 also determines the display mode of the display screen after the password is input by the user as the confidential display even when the user's confidential intention level is high. Moreover, the display control part 30 determines the display aspect of the display screen after a password input by a user as a normal display, when a user's secrecy will level is a medium level. Further, when the user's secret will level is low, the display control unit 30 determines the display mode of the display screen after the password is input by the user as an enlarged display.

  The secret display is to display in a display mode in which the visibility of the display screen is lower than that of the normal display. In the present embodiment, the display is visually reduced by reducing the display size of the display screen than the normal display. The case where a property is reduced is illustrated. However, the confidential display is not necessarily limited to the display with the display size of the display screen reduced compared to the normal display. For example, display that converts color display to monochrome display, displays that reduce the brightness of the backlight of the liquid crystal display, and displays the image displayed on the display screen by applying mosaic processing or resolution reduction processing What is to be performed is an example of confidential display.

  Further, the enlarged display is to display the display screen with an enlarged display size than the normal display. In the present embodiment, as an enlarged display, an example in which the display screen after password entry is displayed in full screen on the display unit 11 is illustrated, but the display is not necessarily limited to full screen display.

  When the display mode of the display screen is determined based on the determination information TB1, the display control unit 30 displays the next display screen to be displayed on the display unit 11 after the password is input by the user based on the determined display mode. For example, when the next display screen is a screen that displays a preview image of the document 28 specified by the user, the display control unit 30 causes the preview image generation unit 36 to function and the preview image of the document 28 specified by the user. Is generated. Further, the display control unit 30 causes the display screen generation unit 35 to function and generates a preview display screen including a preview image generated by the preview image generation unit 36. At this time, the display screen generation unit 35 generates a display screen corresponding to the display mode determined based on the determination information TB1. Then, the display control unit 30 updates the display screen of the display unit 11 by outputting the display screen generated by the display screen generation unit 35 to the display unit 11. A specific transition example of the display screen performed in this way will be described with reference to FIGS.

  FIG. 7 is a diagram illustrating screen transition when the display screen after the password is input is enlarged. As shown in FIG. 7A, the password input screen G2 is displayed on the display unit 11, and the password is handwritten with a relatively large character size in the handwriting input region R1, and the character size ratio is the second. If the value is greater than the value, the willingness determination unit 31 determines that the user's secret willing level is low. In this case, the display control unit 30 determines the display mode of the display screen after the password is input as an enlarged display based on the determination information TB1. Then, the display control unit 30 changes the display screen of the display unit 11 from the state illustrated in FIG. 7A to the state illustrated in FIG. 7B, and causes the display unit 11 to display the preview display screen G3 on the full screen. In the preview display screen G3 having the full screen display size, since the preview image of the document 28 designated by the user is displayed in a size larger than the normal display, there is an advantage that the user can easily understand the contents of the document 28. .

  FIG. 8 is a diagram illustrating screen transition when the display screen after the password is input is normally displayed. As shown in FIG. 8A, the password input screen G2 is displayed on the display unit 11, and the password is handwritten by the user with a medium character size in the handwriting input region R1, and the character size ratio is the first. When the value is equal to or greater than the value and equal to or less than the second value, the confidentiality determination unit 31 determines that the user's confidentiality determination level is an intermediate level. In this case, the display control unit 30 determines the display mode of the display screen after entering the password as normal display based on the determination information TB1. Then, the display control unit 30 changes the display screen of the display unit 11 from the state shown in FIG. 8A to the state shown in FIG. 8B, and changes the normal display size preview display screen G3 to the list display screen G1. Overlay the front side. In the normal display size preview display screen G3, the preview image of the document 28 designated by the user is displayed in the normal size.

  FIG. 9 is a diagram illustrating screen transition when the display screen after the password is input is displayed in a secret manner. As shown in FIG. 9A, the password input screen G2 is displayed on the display unit 11, and the password is handwritten by a user with a relatively small character size in a part of the handwriting input region R1. When the ratio is smaller than the first value, the confidentiality determination unit 31 determines that the user's confidentiality determination level is high. In this case, the display control unit 30 determines the display mode of the display screen after the password is input as the confidential display based on the determination information TB1. Then, the display control unit 30 changes the display screen of the display unit 11 from the state shown in FIG. 9A to the state shown in FIG. 9B, and lists the preview display screen G3 reduced to a predetermined secret display size. It is displayed superimposed on the front side of the display screen G1.

  At this time, the display control unit 30 determines the display position of the preview display screen G3 reduced based on the input position of the password input from the operation input unit 12c, and displays the preview display screen G3 at the display position. That is, when displaying the preview display screen G3 reduced to the secret display size on the display unit 11, the display control unit 30 displays the preview display screen G3 at substantially the same position as the position where the user inputs the password to the handwriting input area R1. Is displayed. In the example of FIG. 9A, since the password is handwritten by the user at the left side of the handwriting input area R1, the preview display screen is reduced to the secret display size as shown in FIG. 9B. G3 is displayed on the left side of the entire display area of the display unit 11.

  On the other hand, FIG. 10 is a diagram showing a screen transition when the user inputs a password with a small character size on the right side of the handwriting input area R1. As shown in FIG. 10A, when a password with a small character size is input by the user at a biased position on the right side of the handwriting input area R1, the display control unit 30 displays a preview display screen reduced to a secret display size. When G3 is displayed on the display unit 11, a preview display screen G3 is displayed on the right side of the entire display area of the display unit 11 as shown in FIG.

  Thus, when displaying the preview display screen G3 reduced to the secret display size, the preview image included in the preview display screen G3 is displayed to other users by displaying the password at the position where the password is input by handwriting in the handwriting input area R1. It becomes possible to prevent being seen. This is because, for example, when the user performs handwriting input while hiding his hand when performing password handwriting input, the preview display screen G3 displayed subsequently is displayed inside the hidden hand. Therefore, when the user confirms the preview image of the document 28 that the other user does not want to see, the user can confirm the preview image while keeping the preview image secret from other users.

  Next, a specific processing procedure performed in the control unit 20 for performing the display screen control as described above will be described. 11 to 14 are flowcharts illustrating an example of a processing procedure performed in the control unit 20 of the image processing apparatus 1. The processing based on this flowchart is performed when the CPU 20a of the control unit 20 executes the program 9.

  As shown in FIG. 11, when the document 28 stored in the box 27 is designated by the user (step S10), the control unit 20 determines whether or not a password 29 is set for the document 28 (step S10). Step S11). As a result, when the password 29 is set (YES in step S11), the control unit 20 causes the display control unit 30 to function and displays the password input screen G2 on the display unit 11 (step S12). Is waited until the handwriting input operation is completed (step S13). At this time, the display control unit 30 may sequentially display the password input by the user in the handwriting input area R1 based on the locus of the handwriting input operation by the user. When the password input operation by the user is completed, the input password is recognized by the operation input unit 12c (step S14), and the control unit 20 acquires the password recognized as a character string by the operation input unit 12c.

  Then, the control unit 20 determines whether or not the display mode of the display screen to be displayed after password authentication has already been determined (step S15), and when the display mode has not yet been determined (NO in step S15), the step The display mode is determined by sequentially performing the processes of S16 to S18. For example, when the password input operation by the user is the first operation, the processing in steps S16 to S18 is always performed, and the display mode is determined. On the other hand, when the authentication of the password input by the user fails and the password input operation by the user for the second time or later is performed, the display mode has already been determined, so the processing of steps S16 to S18 is performed. skip.

  In step S16, the control unit 20 executes a confidentiality will determination process. FIG. 12 is a flowchart showing an example of a detailed processing procedure of the confidentiality determination process (step S16). This process is performed when the confidentiality determination unit 31 functions in the control unit 20. First, the confidentiality determination unit 31 acquires the display size of the handwriting input area R1 displayed on the display unit 11 (step S30), and acquires the character size of the password input by the user (step S31). Then, the willingness determination unit 31 calculates a character size ratio with respect to the display size of the handwriting input area R1 (step S32), and determines whether the character size ratio is smaller than a predetermined first value. (Step S33). As a result, when the character size ratio is smaller than the first value (YES in step S33), the confidentiality determination unit 31 determines that the confidentiality level of the user is a high level (step S34).

  On the other hand, when the character size ratio is equal to or greater than the first value (NO in step S33), the confidentiality determination unit 31 determines whether the character size ratio is equal to or less than a predetermined second value. Is determined (step S35). Note that the second value is determined in advance as a value larger than the first value. If the character size ratio is equal to or smaller than the second value (YES in step S35), the confidentiality determination unit 31 determines that the confidentiality level of the user is a medium level (step S36). If the character size ratio is larger than the second value (NO in step S35), the confidentiality determination unit 31 determines that the confidentiality level of the user is a low level (step S37). With the above, the confidentiality determination process is completed.

  Returning to FIG. 11, the process proceeds to step S <b> 17, where the control unit 20 executes a security level determination process. FIG. 13 is a flowchart showing an example of a detailed processing procedure of the security level determination processing (step S17). This process is performed when the security level determination unit 32 functions in the control unit 20. First, the security level determination unit 32 acquires the character string of the password recognized by the operation input unit 12c (step S40). The security level determination unit 32 determines whether or not the character string is composed of 12 characters or more (step S41). If the character string is composed of 12 characters or more (YES in step S41), the security level is increased. The level is determined (step S42).

  On the other hand, when the password character string is less than 12 characters (NO in step S41), the security level determination unit 32 determines whether the password character string is composed of four characters or more (step S43). If it is composed of four or more characters (YES in step S43), the security level is determined to be a medium level (step S44). If the character string is less than 4 characters (NO in step S43), the security level determination unit 32 determines that the security level is a low level (step S45). This completes the security level determination process. The number of characters for determining the security level can be arbitrarily set.

  Returning to FIG. 11, next, when the process proceeds to step S <b> 18, the control unit 20 executes display mode determination processing. FIG. 14 is a flowchart showing an example of a detailed processing procedure of the display mode determination process (step S18). This process is performed when the display control unit 30 functions in the control unit 20. The display control unit 30 determines whether or not the security level determined in the security level determination process (step S17) is high (step S50), and when the security level is high (YES in step S50). The display mode is determined to be confidential display (step S51). And the display control part 30 determines the display position of the display screen displayed next based on the input position of the password input by handwriting in the handwriting input area R1 (step S52).

  On the other hand, when the security level determined in the security level determination process (step S17) is not high (NO in step S50), the display control unit 30 determines the confidentiality of the user determined in the confidentiality determination process (step S16). It is determined whether or not the level is a high level (step S53). As a result, when the secret will level is high (YES in step S53), the display control unit 30 determines the display mode to be secret display as in the case where the security level is high (step S51). Based on the input position of the password input by handwriting in the handwriting input area R1, the display position of the display screen to be displayed next is determined (step S52).

  If the user's secret will level is not high (NO in step S53), the display control unit 30 determines whether the secret will level is medium (step S54), and if it is medium (step S54). The display mode is determined to be normal display (YES in S54) (step S55). On the other hand, when the secret will level is not the medium level (NO in step S54), the display control unit 30 determines the display mode to be enlarged display (step S56). This is the end of the display mode determination process.

  Returning to FIG. 11 again, next, the control unit 20 causes the password authentication unit 33 to function, and determines whether or not the password input by the user matches the password 29 preset in the document 28. Is performed (step S19). Then, the control unit 20 determines whether or not the password authentication is successful (step S20). If the authentication is unsuccessful, the control unit 20 returns to step S12 and prompts the user to input the password again. In this case, since the display mode corresponding to the character size of the password that has failed in authentication has already been determined, even if the user performs a handwritten input of the password with a character size larger than the previous time, the display mode already determined Will not change. Therefore, when the user first tries to input the password with a small character size in order to conceal the contents of the document 28 and the handwriting input operation is erroneous, as a result, when the authentication fails, Since handwritten input can be performed with a relatively large character size, the same erroneous operation is not repeated, and repeated authentication failures due to password authentication can be prevented.

  If the password authentication is successful (YES in step S20), the control unit 20 causes the display control unit 30 to function and generates a display screen to be displayed next (step S21). That is, the display control unit 30 reads the document 28 designated by the user from the box 27, generates a preview image, and generates a preview display screen G3 including the preview image. At this time, the display control unit 30 generates a display screen corresponding to the display mode determined in step S18. And the display control part 30 outputs the display screen produced | generated by step S21 to the display part 11, and updates the display screen of the display part 11 (step S22).

  On the other hand, if no password is set for the document 28 designated by the user (NO in step S11), the display control unit 30 determines that the display mode of the display screen to be displayed next is enlarged display (step S23). Then, the display control unit 30 generates a preview display screen G3 corresponding to the enlarged display (step S21), and updates the display screen of the display unit 11 by outputting the preview display screen G3 to the display unit 11 (step S22). ).

  As described above, the image processing apparatus 1 according to the present embodiment is configured to accept a password input operation by a user while the password input screen G2 is displayed on the display unit 11, and the user inputs a password. Is provided with a confidentiality determination unit 31 that determines the user's confidentiality level based on the input operation mode of the user, and a security level determination unit 32 that determines the security level of the password input by the user. . Then, the display control unit 30 determines that the level of the user's confidentiality determined by the confidentiality determination unit 31 is equal to or higher than a predetermined level, or the security level of the password determined by the security level determination unit 32 is equal to or higher than the predetermined level. In some cases, the display screen to be displayed next after the password input screen G2 is changed as the password is authenticated by the password authentication unit 33 is displayed in a display mode in which the visibility is lower than the normal display mode. This is a configuration to be displayed on the unit 11. According to such a configuration, the display mode of the display screen can be changed based on the input operation mode when the user inputs the password, the complexity of the password itself, and the like. In particular, when the user carefully enters the password, or when the password entered by the user is composed of a complex character string, the display screen displayed after the transition from the password input screen G2 is the normal display. Since it is displayed on the display unit 11 in a display mode in which visibility is lower than that of the mode, it is possible to prevent other users from seeing information included in the display screen.

  Further, the display control unit 30 in the present embodiment, when the password authentication unit 33 fails to authenticate the password when the user's confidentiality determination level determined by the confidentiality determination unit 31 is equal to or higher than a predetermined level, the subsequent passwords Regardless of the level of confidentiality of the user when the input operation is performed, the display screen displayed on the display unit 11 as the password is authenticated by the password authentication unit 33 is more visible than the normal display mode. It is the structure which displays in the reduced display mode. According to such a configuration, the user can input the password in an operation mode in which erroneous input is less likely to occur at the second and subsequent inputs even if the user has made an incorrect input during the password input operation. Become.

  Further, the display control unit 30 according to the present embodiment is configured to input a password when the password authentication unit 33 authenticates the password when the user's confidentiality determination level determined by the confidentiality determination unit 31 is equal to or higher than a predetermined level. In this configuration, the next display screen to be displayed after transition from the screen G2 is displayed at the position where the password is input by handwriting in the handwriting input area R1. Therefore, it is possible to display the display screen displayed after password authentication is performed at a location hidden by the user, and to prevent the information contained in the display screen from being seen by other users. Can do.

  By the way, in the above, when the confidentiality determination part 31 determines a user's confidentiality determination level, when determining a user's confidentiality determination level mainly based on the character size of the password handwritten by the user in the handwriting input area R1 Was illustrated. However, the method for determining the confidentiality level of the user is not limited to this. For example, when the object detection sensor 17 is provided in the image processing apparatus 1, the confidentiality level of the user is determined based on the size of an object located near the surface of the operation panel 10 detected by the object detection sensor 17. It may be determined.

  FIG. 15 is a diagram illustrating an aspect in which a user performs a password input operation while hiding his hand. As shown in FIG. 15, the object detection sensor 17 is provided along the X direction parallel to the operation panel 10, and has a plurality of light sources arranged in the X direction. The object detection sensor 17 emits invisible light 17a from each of the plurality of light sources to the surface vicinity region of the display unit 11, and detects reflected light from an object located near the surface of the display unit 11. Thus, it is detected that an object is present near the surface of the display unit 11. For example, as shown in FIG. 15, when the user performs a password input operation so as to hide the hand on the left side area of the password input screen G2, the object detection sensor 17 does not hide the hand. An object (user's finger) is detected in a wider range than when an input operation is performed. Therefore, the confidentiality determination unit 31 determines that the confidentiality level of the user is high if the size of the object (size in the X direction) detected by the object detection sensor 17 is equal to or larger than a predetermined size. It doesn't matter. Even in this case, the confidentiality determination unit 31 does not need to calculate the character size ratio, and therefore can efficiently determine the confidentiality level of the user.

  The object detection sensor 17 can also detect the position in the X direction of an object located near the surface of the display unit 11. FIG. 16 is a diagram illustrating an example of a detection signal output from the object detection sensor 17 when an object having a predetermined size or more exists in the X direction. For example, as shown in FIG. 15, when the user performs a password input operation so that the user hides his / her hand from the left area of the password input screen G2, the object detection sensor 17 is shown in FIG. A detection signal SGN1 as shown is output. This detection signal SGN1 indicates that there is an object of a predetermined size or more in the left region near the surface of the display unit 11. On the other hand, for example, when the user performs a password input operation so as to hide his hand from the central area of the password input screen G2, the object detection sensor 17 detects the detection as shown in FIG. Signal SGN2 is output. This detection signal SGN2 indicates that an object of a predetermined size or more exists in the central region near the surface of the display unit 11. Further, when the user performs a password input operation so as to hide the hand on the right area of the password input screen G2, the object detection sensor 17 outputs a detection signal SGN3 as shown in FIG. To do. This detection signal SGN3 indicates that an object of a predetermined size or more exists in the right region near the surface of the display unit 11. Therefore, when displaying the display screen reduced to the secret display size on the display unit 11, the display control unit 30 may display the display screen at a position where an object of a predetermined size or more is detected by the object detection sensor 17.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the first embodiment, the form in which the user inputs the password by handwriting input operation has been described. In contrast, in the present embodiment, a description will be given of a mode in which a keyboard image is displayed on a password input screen, and a user inputs a password by performing a touch operation on the keyboard image. In this embodiment, the hardware configuration and functional configuration of the image processing apparatus 1 are the same as those described in the first embodiment. In the present embodiment, a case where the password is constituted by a character string including only numbers is illustrated.

  FIG. 17 is a diagram illustrating an example of the password input screen G4 displayed on the display unit 11 by the display control unit 30 in the present embodiment. For example, when the list display screen G <b> 1 is displayed on the display unit 11, when one document 28 is selected by the user and a password 29 is set for the document 28, the display control unit 30 displays the display on the display unit 11. The screen is updated to a display screen as shown in FIG. 17A, and the password input screen G4 is displayed so as to be superimposed on the front side of the list display screen G1. FIG. 17A shows an example in which the password input screen G4 is displayed in the normal display size.

  As shown in FIG. 17B, the password input screen G4 has a keyboard image 51 in which a plurality of keys with numbers 0 to 9 and predetermined symbols are arranged in a predetermined arrangement. The password input screen G4 has an enlargement key 52, a reduction key 53, a non-display key 54, and a random key 55 on the right side of the keyboard image 51, and is input by the user above the keyboard image 51. It has a password display field R4 for displaying a password.

  Such a password input screen G4 can be displayed at an arbitrary display position of the display unit 11 by a user performing a drag-and-drop operation or the like, except when the full screen is displayed on the display unit 11. The user can input the password by performing a touch operation on an arbitrary key included in the keyboard image 51 in a state where the password input screen G4 is displayed at an arbitrary display position. However, in addition to the touch operation on the keyboard image 51, for example, when the keypad 16 is attached to the operation panel 10, the user can input a password by performing an operation on the keypad 16. is there.

  The enlargement key 52 provided on the right side of the keyboard image 51 is an operation key for enlarging and displaying the password input screen G4. The reduction key 53 is an operation key for reducing and displaying the password input screen G4. The non-display key 54 is an operation key for switching the password display field R4 included in the password input screen G4 to non-display. Further, the random key 55 is an operation key for changing a plurality of keys arranged in a predetermined arrangement in the keyboard image 51 to a random key arrangement different from the predetermined arrangement.

  FIG. 18 is a diagram showing an example of a display screen when the enlargement key 52 and the reduction key 53 of the password input screen G4 are operated. For example, when the user operates the enlargement key 52 on the password input screen G4 shown in FIG. 17A, the display control unit 30 enlarges the password input screen G4, for example, as shown in FIG. The screen G4 is displayed in full screen on the display unit 11. When such enlargement processing is performed, the keyboard image 51 is also displayed in an enlarged state. Therefore, although it becomes easy for the user to perform password input operations, there is a high possibility that the password input by the user will be seen by other users. On the other hand, when the user operates the reduction key 53 on the password input screen G4 shown in FIG. 17A, the display control unit 30 reduces the password input screen G4, for example, as shown in FIG. The input screen G4 is displayed as a display screen smaller than the normal display size. When such a reduction process is performed, the keyboard image 51 is also displayed in a reduced state. For this reason, it is difficult for the user to perform the password input operation, but it is less likely that the password input by the user will be seen by other users. Thus, the password input screen G4 displayed on the display unit 11 can change the display size based on the operation by the user. When the user does not want the other users to know the password, the password input screen G4 is displayed in a reduced size and the password is input.

  FIG. 19 is a diagram illustrating a display screen example when the non-display key 54 and the random key 55 of the password input screen G4 are operated. For example, when the user operates the non-display key 54 on the password input screen G4 shown in FIG. 17A, the display control unit 30 switches the password display field R4 included in the password input screen G4 to non-display. A password input screen G4 as shown in 19 (a) is displayed on the display unit 11. When such a non-display process is performed, when an arbitrary key included in the keyboard image 51 is operated by the user, it becomes impossible to grasp the input operation of what character. Therefore, when the user does not want to make the password known to other users, the user performs the password input operation by hiding the password display field R4 of the password input screen G4.

  When the user operates the random key 55 on the password input screen G4 shown in FIG. 17A, the display control unit 30 changes a plurality of keys included in the keyboard image 51 of the password input screen G4 into a random key arrangement. For example, a password input screen G4 as shown in FIG. 19B is displayed on the display unit 11. When such a random arrangement process is performed, when any key included in the keyboard image 51 is operated by the user, it becomes impossible to grasp which number is operated. Therefore, when the user does not want to make the password known to other users, the user changes the keys included in the keyboard image 51 of the password input screen G4 to a random key arrangement and performs the password input operation.

  In addition to the above, when the user does not want to know the password to be input, the user can display the password input screen G4 on the display unit 11 while the password input screen G4 is displayed in the normal display mode. In some cases, the password input operation is performed in a state in which the user moves to the peripheral portion within the display range and hides the hand.

  And the secret will determination part 31 of this embodiment determines a user's secret will level according to the display mode of the password input screen G4, when the password input operation by a user is performed. That is, also in the present embodiment, the control unit 20 of the image processing apparatus 1 sequentially executes the processing based on the flowchart of FIG. 11, but details of the confidentiality determination processing (step S <b> 16) performed by the confidentiality determination unit 31. The processing procedure is different from the processing procedure described in the first embodiment.

  FIG. 20 is a flowchart illustrating an example of a detailed processing procedure of the confidentiality determination processing (step S16) in the present embodiment. When the confidentiality determination unit 31 starts this process, it determines whether the password input by the user is input to the keypad 16 (step S70). As a result, when the password is input to the keypad 16 (YES in step S70), the confidentiality determination unit 31 determines that the user's confidentiality determination level is a medium level (step S71). When the password input by the user is not input to the keypad 16 but input by a touch operation on the keyboard image 51 (NO in step S70), the confidentiality determination unit 31 displays the password input screen. It is determined whether or not the password is input when the display state of G4 is the normal display state (step S72). In this normal display state, the password input screen G4 is not enlarged or reduced, the password display field R4 is not displayed, or a plurality of keys included in the keyboard image 51 are randomized. This is an undisplayed display state, which is the display state shown in FIG. If the password input operation is performed when the password input screen G4 is in the normal display state (YES in step S72), the confidentiality determination unit 31 determines that the password input screen G4 is within the display range of the display unit 11. It is determined whether or not a password input operation has been performed in a state of being positioned at the peripheral edge (step S73). As a result, when the password input screen G4 is not located at the peripheral edge of the display range (NO in step S73), the confidentiality determination unit 31 determines the user's confidentiality determination level to be a medium level (step S71). On the other hand, when the password input screen G4 is located at the peripheral portion of the display range and the password input operation is performed at the peripheral portion (YES in step S73), the confidentiality determination unit 31 determines the confidentiality of the user. The will level is determined to be a high level (step S77).

  On the other hand, when the password input operation is performed when the password input screen G4 is not in the normal display state (NO in step S72), the confidentiality determination unit 31 displays the password input screen G4 in a reduced display state. It is determined whether or not a password input operation has been performed (step S74). When the password input screen G4 is not a password input in a reduced display state (NO in step S74), the confidentiality determination unit 31 performs the password input operation in a state where the password display field R4 is switched to non-display. It is determined whether or not it has been performed (step S75). Furthermore, when the password display field R4 is not a password input in a state where it is switched to non-display (NO in step S75), the confidentiality determination unit 31 changes the plurality of keys included in the keyboard image 51 to a random key arrangement. It is determined whether or not a password input operation has been performed in this state (step S76). Then, any one of the state in which the password input screen G4 is displayed in a reduced size, the state in which the password display field R4 is switched to non-display, and the state in which a plurality of keys included in the keyboard image 51 are changed to a random key arrangement When the password input operation is performed (YES in steps S74, S75, and S76), the confidentiality determination unit 31 determines that the confidentiality level of the user is a high level (step S77). If the password input screen G4 is enlarged and displayed (NO in step S76), the confidentiality determination unit 31 determines that the user's confidentiality determination level is a low level (step S78).

  By performing the above-described processing by the confidentiality determination unit 31, for example, the user can change the display mode of the password input screen G4 to any one of FIGS. 18B, 19A, and 19B. When the password is changed to the display mode and the password input operation is performed, it is determined that the user's secrecy level is high. In addition, when the display mode of the password input screen G4 is not changed, when the user performs a password input operation at the peripheral portion of the display range of the display unit 11, it is determined that the user's confidentiality level is high. The preview display screen displayed after password authentication is displayed in a display mode (for example, a display mode reduced to a secret display size) in which the visibility of the display screen is lower than that of the normal display. Further, when displaying the preview display screen reduced to the secret display size on the display unit 11, the display control unit 30 displays the preview display screen at the position where the keyboard image 51 of the password input screen G4 was displayed. Thereby, it is possible to prevent the preview image of the document 28 included in the preview display screen from being seen by other users. In particular, when the user performs a touch operation on the keyboard image 51 and inputs a password, if the touch operation is performed with the hand hidden, the preview display screen can be displayed inside the hidden hand. Therefore, it is possible to favorably prevent the preview image of the document 28 from being seen by other users.

  In the above, the password is configured by a character string including only numbers, and the keyboard image 51 included in the password input screen G4 is an image in which a plurality of keys capable of inputting such numbers are arranged. Was illustrated. However, the password may be a character string including alphabets. In that case, the keyboard image 51 included in the password input screen G4 is configured as an image in which a plurality of keys including alphabets are arranged.

  In the image processing apparatus 1 of the present embodiment, points other than those described above are the same as those described in the first embodiment.

(Third embodiment)
Next, a third embodiment of the present invention will be described. In the first and second embodiments, when the preview image of the document 28 in which the password 29 is set in advance is displayed, the user manually inputs the password, and the display mode of the display screen is displayed after the password is input. The form to control was demonstrated. However, this type of image processing apparatus 1 not only accepts a password input operation by the user when displaying a preview image of the document 28 for which the password 29 is set, but also when the user logs in to the image processing apparatus 1. Alternatively, when the user accesses the box 27 in which the password 29 is set in advance, the password input operation by the user is accepted. Therefore, in this embodiment, when a user enters those passwords, if the password is entered by a careful operation that is hidden from other users only once, various display screens displayed on the display unit 11 after that are displayed. A mode in which the display mode is displayed as a confidential display will be described. In this embodiment, the hardware configuration and functional configuration of the image processing apparatus 1 are the same as those described in the first embodiment.

  FIG. 21 is a diagram illustrating an example of a display screen displayed when the user performs a login operation on the image processing apparatus 1. When the user performs a login operation on the image processing apparatus 1, the display control unit 30 displays a login operation screen G <b> 5 as illustrated in FIG. 21A on the display unit 11. On the login operation screen G5, a user ID input field and a password input field are displayed. When the user instructs password input in the password input field, the display control unit 30 displays a password input screen G2 having a handwriting input area similar to that in the first embodiment. When this password input screen G2 is displayed, for example, as shown in FIG. 21A, it is assumed that the user has input the password by hand with a relatively large character size in the handwriting input area. In this case, when the user authentication performed in the control unit 20 is successful, the display control unit 30 updates the display screen of the display unit 11 to a display screen corresponding to the login user. At this time, the display control unit 30 generates a display screen G6 including a box list accessible to the login user, and outputs the display screen G6 to the display unit 11. As a result, the display screen of the display unit 11 is updated from the display state of FIG. 21A to the display state of FIG.

  In the screen transition shown in FIG. 21, since the password handwritten by the user during the login operation has a relatively large character size, the confidentiality determination unit 31 determines that the confidentiality level of the user is low. As a result, the display screen G6 displayed on the display unit 11 after user authentication by the display control unit 30 is displayed as a list display screen for displaying the box list in a normal display mode. In the display screen G6 in FIG. 21B, five boxes that can be accessed by the login user are displayed, and a case is shown in which passwords are set for two of the boxes.

  Next, FIG. 22 is a diagram illustrating an example of a display screen displayed when the user performs an operation on the box list. When the display screen G6 as shown in FIG. 21B is displayed, if the user selects a box in which a password is set, the display control unit 30 first displays as shown in FIG. A password input screen G2 having a handwriting input area similar to that of the embodiment is displayed. When the password input screen G2 is displayed, it is assumed that the user has handwritten the password with a relatively small character size in the handwriting input area, for example, as shown in FIG. In this case, when the password authentication performed in the password authentication unit 33 of the control unit 20 is successful, the display control unit 30 updates the display screen of the display unit 11 to a display screen corresponding to the box designated by the login user. At this time, the display control unit 30 generates a display screen G7 including the file list of the document 28 stored in the box 27 designated by the login user, and outputs the display screen G7 to the display unit 11. As a result, the display screen of the display unit 11 is updated from the display state of FIG. 22A to the display state of FIG.

  In the screen transition shown in FIG. 22, since the password handwritten by the user in accordance with the box selection has a relatively small character size, the confidentiality determination unit 31 determines that the confidentiality level of the user is high. . And the display control part 30 determines the display mode of the display screen G7 displayed on the display part 11 next to a confidential display. As a result, the display screen G7 displayed on the display unit 11 after password authentication by the display control unit 30 is a list including a file list 61 whose visibility is lower than that of a normal display mode as shown in FIG. Displayed as a display screen. Such a file list 61 has a smaller display size and lower visibility than a file list having a normal display mode included in the list display screen shown in FIG. 4A, for example. Further, when displaying such a file list 61, the display control unit 30 displays the file list 61 at a position where the user has performed handwriting input of a password in the handwriting input area. Thereby, it can prevent favorably that the contents of the file list 61 displayed on the display unit 11 are visually recognized by other users.

  In the present embodiment, when the display control unit 30 determines the display mode of the display screen to be the confidential display between the time when the user performs the login operation to the image processing apparatus 1 and the time when the user logs out, the display unit 11 is displayed thereafter. Even when the display screen to be displayed is updated, the display mode of the confidential display is continued. Therefore, for example, when the user designates the document 28 in which the password 29 is set in the state where the display screen G7 shown in FIG. Even if the password is input with a large character size of almost the same size, the preview display screen to be displayed next is displayed in a secret display mode.

  Next, FIG. 23 is a diagram illustrating an example of a display screen that is displayed when a user inputs a password with a relatively small character size when performing a login operation. When the user performs a login operation on the image processing apparatus 1, as shown in FIG. 23A, when the user inputs a password by hand with a relatively small character size in the handwriting input area, the confidentiality determination unit 31 It is determined that the confidentiality level of the user is a high level. As a result, the display control unit 30 determines the display mode of the next display screen to be confidential display. When the user authentication performed in the control unit 20 is successful, the display control unit 30 generates the display screen G8 in the secret display mode when generating the display screen G8 including the box list accessible to the login user, and displays the display screen G8. The screen G8 is output to the display unit 11. As a result, the display screen of the display unit 11 is updated from the display state of FIG. 23A to the display state of FIG.

  In the screen transition shown in FIG. 23, the display screen G8 displayed on the display unit 11 after the user authentication by the display control unit 30 is a box whose visibility is lower than the normal display mode as shown in FIG. A list display screen including the list 62 is displayed. For example, such a box list 62 has a smaller display size and lower visibility than a box list having a normal display form included in the list display screen shown in FIG. Further, when displaying such a box list 62, the display control unit 30 displays the box list 62 at a position where the user has performed handwriting input of a password in the handwriting input area. Thereby, it can prevent favorably that the contents of the box list 62 displayed on the display unit 11 are visually recognized by other users.

  Then, when the display screen G8 of the secret display mode as shown in FIG. 23B is displayed after the user authentication, the display mode of the secret display continues when the display screen displayed on the display unit 11 is updated thereafter. . Therefore, when the logged-in user performs the password input operation before the logged-in user logs out, the display screen that is displayed after the password is input in any operation mode is displayed in the confidential display mode. Will come to be.

  Therefore, the image processing apparatus 1 according to the present embodiment does not need to perform an input operation with a small character size every time when the user performs an input operation of the password, and thus can improve the operability when inputting the password.

  In the above, the case where the user performs handwriting input of the password is illustrated as an example as in the first embodiment, but the present invention is not limited to this. That is, when the user performs a password input operation, the password input screen G4 including the keyboard image 51 is displayed as described in the second embodiment, and is displayed thereafter based on the display mode of the password input screen G4. It may be determined whether or not the display screen is switched to the confidential display.

  In the image processing apparatus 1 of the present embodiment, points other than those described above are the same as those described in the first and second embodiments.

(Modification)
As mentioned above, although embodiment regarding this invention was described, this invention is not restricted to the thing of the content demonstrated in said each embodiment, A various modification is applicable.

  For example, in each of the above-described embodiments, the case where the image processing apparatus is configured by an MFP is illustrated, but the present invention is not limited to this. In other words, the image processing apparatus according to the present invention may be a general personal computer, a tablet terminal, a smartphone, or the like, for example, as long as the password is manually input by the user and the display screen is updated after password authentication. It doesn't matter.

  Moreover, although the case where each of the confidentiality willing level and the security level is determined at three levels has been exemplified in the above embodiment, the present invention is not limited to this. It doesn't matter. Further, each of the confidentiality willing level and the security level may be determined at four or more levels.

DESCRIPTION OF SYMBOLS 1 Image processing apparatus 9 Program 10 Operation panel 11 Display part (display means)
12c Operation input unit (operation input means)
17 Object detection sensor (sensor)
30 Display control unit (display control means)
31 Confidentiality determination unit (Confidential determination unit)
32 Security level judgment section (security level judgment means)
33 Password authentication part (password authentication means)

Claims (27)

Display means for displaying various display screens;
Display control means for controlling a display screen in the display means;
An operation input means for accepting a password input operation by a user in a state where a password input screen is displayed on the display means by the display control means;
Based on the input operation mode of the user when a password is input to the operation input unit, a confidentiality determination unit that determines the level of the confidentiality of the user ,
Password authentication means for authenticating the password by determining whether or not the password input to the operation input means matches a preset character string;
With
When the password authentication by the password authentication unit fails when the user's confidentiality determination level determined by the confidentiality determination unit is equal to or higher than a predetermined level, the display control unit performs a subsequent password input operation. regardless of the level of the user's secret intention when performed, the display screen the password displayed on the display unit I accompanied to be authenticated in the password authentication unit, reduces the visibility than the normal display mode the image processing apparatus characterized by a display mode has. Display means for displaying various display screens;
Display control means for controlling a display screen in the display means;
An operation input means for accepting a password input operation by a user in a state where a password input screen is displayed on the display means by the display control means;
Based on the input operation mode of the user when a password is input to the operation input unit, a confidentiality determination unit that determines the level of the confidentiality of the user ,
Password authentication means for authenticating the password by determining whether or not the password input to the operation input means matches a preset character string;
With
The display control means displays the password input screen by providing a handwriting input area,
The operation input means can accept password input by a user's handwriting input operation performed on the handwriting input area,
The confidentiality determination means determines that the level of confidentiality of the user is equal to or higher than a predetermined level when a character size of a password input by handwriting to the handwriting input area is smaller than a predetermined size,
Wherein the display control unit, wherein when the level of concealment user confidentiality will be determined by the intention determining means is a predetermined level or more, with that password is authenticated in the previous SL password authentication means, the transition from the password input screen An image processing apparatus characterized in that a display screen to be displayed is displayed on the display unit in a display mode in which visibility is lower than that in a normal display mode. Display means for displaying various display screens;
Display control means for controlling a display screen in the display means;
An operation input means for accepting a password input operation by a user in a state where a password input screen is displayed on the display means by the display control means;
Based on the input operation mode of the user when a password is input to the operation input unit, a confidentiality determination unit that determines the level of the confidentiality of the user ,
Password authentication means for authenticating the password by determining whether or not the password input to the operation input means matches a preset character string;
With
The display control means displays the password input screen by providing a handwriting input area,
The operation input means can accept password input by a user's handwriting input operation performed on the handwriting input area,
The concealment determination unit determines that the level of concealment of the user is equal to or higher than a predetermined level when a password input by handwriting to the handwriting input region is input to the inner peripheral edge of the handwriting input region,
Wherein the display control unit, wherein when the level of concealment user confidentiality will be determined by the intention determining means is a predetermined level or more, with that password is authenticated in the previous SL password authentication means, the transition from the password input screen An image processing apparatus characterized in that a display screen to be displayed is displayed on the display unit in a display mode in which visibility is lower than that in a normal display mode. The display control means transitions from the password input screen when the password is authenticated by the password authentication means when the level of the user's confidentiality determined by the confidentiality determination means is a predetermined level or higher. display screen for displaying by the image processing apparatus according to claim 2 or 3 password in the handwriting input area and displaying the handwriting input position. Display means for displaying various display screens;
Display control means for controlling a display screen in the display means;
An operation input means for accepting a password input operation by a user in a state where a password input screen is displayed on the display means by the display control means;
Based on the input operation mode of the user when a password is input to the operation input unit, a confidentiality determination unit that determines the level of the confidentiality of the user ,
Password authentication means for authenticating the password by determining whether or not the password input to the operation input means matches a preset character string;
With
The display control means provides and displays a keyboard image in which a plurality of keys are arranged in a predetermined arrangement on the password input screen, and changes the display size of the keyboard image based on a user operation on the operation input means. Is possible,
The concealment determination unit determines that the level of concealment of the user is a predetermined level or more when a password is input in a state where the display size of the keyboard image is smaller than a predetermined size,
Wherein the display control unit, wherein when the level of concealment user confidentiality will be determined by the intention determining means is a predetermined level or more, with that password is authenticated in the previous SL password authentication means, the transition from the password input screen An image processing apparatus characterized in that a display screen to be displayed is displayed on the display unit in a display mode in which visibility is lower than that in a normal display mode. Display means for displaying various display screens;
Display control means for controlling a display screen in the display means;
An operation input means for accepting a password input operation by a user in a state where a password input screen is displayed on the display means by the display control means;
Based on the input operation mode of the user when a password is input to the operation input unit, a confidentiality determination unit that determines the level of the confidentiality of the user ,
Password authentication means for authenticating the password by determining whether or not the password input to the operation input means matches a preset character string;
With
The display control means provides and displays a keyboard image in which a plurality of keys are arranged in a predetermined arrangement on the password input screen, and displays the display position of the keyboard image based on a user operation on the operation input means. Can be changed within the display range of
The concealment determination unit determines that the level of concealment of the user is equal to or higher than a predetermined level when a password is input in a state where the keyboard image is located at a peripheral portion within the display range,
Wherein the display control unit, wherein when the level of concealment user confidentiality will be determined by the intention determining means is a predetermined level or more, with that password is authenticated in the previous SL password authentication means, the transition from the password input screen An image processing apparatus characterized in that a display screen to be displayed is displayed on the display unit in a display mode in which visibility is lower than that in a normal display mode. The display control means transitions from the password input screen when the password is authenticated by the password authentication means when the level of the user's confidentiality determined by the confidentiality determination means is a predetermined level or higher. a display screen for display by the image processing apparatus according to claim 5 or 6, characterized in that display to the position where the keyboard image was displayed. Display means for displaying various display screens;
Display control means for controlling a display screen in the display means;
An operation input means for accepting a password input operation by a user in a state where a password input screen is displayed on the display means by the display control means;
Based on the input operation mode of the user when a password is input to the operation input unit, a confidentiality determination unit that determines the level of the confidentiality of the user ,
Password authentication means for authenticating the password by determining whether or not the password input to the operation input means matches a preset character string;
With
The display control means provides and displays a keyboard image in which a plurality of keys are arranged in a predetermined arrangement on the password input screen, and displays a plurality of keys included in the keyboard image based on a user operation on the operation input means. It is possible to change to an array different from the predetermined array,
When the password is input in a state in which the plurality of keys included in the keyboard image are changed to an arrangement different from the predetermined arrangement, the confidentiality determination unit is configured such that the level of the user's confidentiality determination is greater than or equal to a predetermined level. Judgment,
Wherein the display control unit, wherein when the level of concealment user confidentiality will be determined by the intention determining means is a predetermined level or more, with that password is authenticated in the previous SL password authentication means, the transition from the password input screen An image processing apparatus characterized in that a display screen to be displayed is displayed on the display unit in a display mode in which visibility is lower than that in a normal display mode. Display means for displaying various display screens;
Display control means for controlling a display screen in the display means;
An operation input means for accepting a password input operation by a user in a state where a password input screen is displayed on the display means by the display control means;
Based on the input operation mode of the user when a password is input to the operation input unit, a confidentiality determination unit that determines the level of the confidentiality of the user ,
Password authentication means for authenticating the password by determining whether or not the password input to the operation input means matches a preset character string;
With
The display control means is provided with a keyboard image in which a plurality of keys are arranged in a predetermined arrangement and a password display field for displaying a password input by a user on the password input screen, and displays the password on the operation input means. It is possible to switch off the password display field based on the user's operation,
The confidentiality determination means determines that the level of confidentiality of the user is equal to or higher than a predetermined level when a password is input in a state where the password display field included in the password input screen is switched to non-display,
Wherein the display control unit, wherein when the level of concealment user confidentiality will be determined by the intention determining means is a predetermined level or more, with that password is authenticated in the previous SL password authentication means, the transition from the password input screen An image processing apparatus characterized in that a display screen to be displayed is displayed on the display unit in a display mode in which visibility is lower than that in a normal display mode. Display means for displaying various display screens;
Display control means for controlling a display screen in the display means;
An operation input means for accepting a password input operation by a user in a state where a password input screen is displayed on the display means by the display control means;
Based on the input operation mode of the user when a password is input to the operation input unit, a confidentiality determination unit that determines the level of the confidentiality of the user ,
Password authentication means for authenticating the password by determining whether or not the password input to the operation input means matches a preset character string;
A sensor capable of detecting the size of an object located near the surface of the operation input means;
With
When the password input operation by the user is performed in a state where the password input screen is displayed, the secret will determination unit determines whether the secret secret of the user is detected when an object of a predetermined size or more is detected by the sensor. It is determined that the level is equal to or higher than the predetermined level
Wherein the display control unit, wherein when the level of concealment user confidentiality will be determined by the intention determining means is a predetermined level or more, with that password is authenticated in the previous SL password authentication means, the transition from the password input screen An image processing apparatus characterized in that a display screen to be displayed is displayed on the display unit in a display mode in which visibility is lower than that in a normal display mode. When the level of the user's confidentiality determination determined by the confidentiality determination unit is equal to or higher than a predetermined level, the display control unit causes the password authentication unit to transition from the password input screen when the password is authenticated. The image processing apparatus according to claim 10 , wherein a display screen to be displayed is displayed at a position where an object of a predetermined size or more is detected by the sensor. Security level determination means for determining a security level of a password input to the operation input means;
Further comprising
The display control means has a security level of the password determined by the security level determination means when the level of the user's confidentiality determined by the confidentiality determination means is a predetermined level or higher. If the password is authenticated by the password authenticating means, the display screen to be displayed after transitioning from the password input screen is changed to a display mode in which the visibility is lower than the normal display mode. The image processing apparatus according to claim 1, wherein the image processing apparatus is displayed. Said security level determination means, when the password input to the operation input means is a predetermined number or more character strings, in claim 12, the security level of the password and judging that the predetermined level or higher The image processing apparatus described. It said operation input means, the image processing apparatus according to any one of claims 1 to 13, characterized in that it is capable of accepting an input operation of the user performed on the display screen of the display unit.   When the display control means generates a display screen having a lower visibility than a normal display mode as a display screen to be displayed by transitioning from the password input screen, the display control unit is smaller than the normal display size. The image processing apparatus according to claim 1, wherein a display screen having a size is generated.   16. The display control unit according to claim 1, wherein the display control unit generates a display screen including a preview image of a document designated by a user when generating a display screen to be displayed after transition from the password input screen. The image processing apparatus according to any one of the above.   The said display control means produces | generates the display screen containing the list display of several information, when producing | generating the display screen displayed by making a transition from the said password input screen. The image processing apparatus described. A display screen control method for controlling a display screen displayed on the display means in an image processing apparatus having a display means,
(a) displaying a password input screen on the display means;
(b) receiving a password input operation by a user in a state where the password input screen is displayed on the display means;
(c) determining a user's level of confidentiality based on the user's input operation mode when a password input operation is performed by the user ;
(d) authenticating the password by determining whether the password entered by the user matches a preset character string;
(e) with the password being authenticated in step (d), transitioning the display screen on the display means;
Have
In the step (e), when the authentication of the password fails in the step (d) when the level of the user's confidentiality determined in the step (c) is a predetermined level or more, the subsequent password input operation regardless of the level of the user's secret intention when performed, the display screen password in the step (d) displayed on the display unit I accompanied to be authenticated, visibility than the normal display mode A display screen control method characterized in that the display mode is reduced. A display screen control method for controlling a display screen displayed on the display means in an image processing apparatus having a display means,
(a) displaying a password input screen on the display means;
(b) receiving a password input operation by a user in a state where the password input screen is displayed on the display means;
(c) determining a user's level of confidentiality based on the user's input operation mode when a password input operation is performed by the user ;
(d) authenticating the password by determining whether the password entered by the user matches a preset character string;
(e) with the password being authenticated in step (d), transitioning the display screen on the display means;
Have
The step (a) is provided by providing a handwriting input area on the password input screen,
Step (b) is capable of accepting a password input by a user's handwriting input operation performed on the handwriting input area,
In the step (c), it is determined that the level of confidentiality of the user is equal to or higher than a predetermined level when the character size of the password handwritten to the handwriting input area is smaller than a predetermined size,
Wherein step (e), when the level of the user's confidential intention is determined at the step (c) is a predetermined level or more, with that password before Symbol step (d) is authenticated, the password input screen display screen control method for a display screen for displaying by transitioning, and Turkey, wherein is displayed on the display unit in the display mode with a reduced visibility than ordinary display mode from. A display screen control method for controlling a display screen displayed on the display means in an image processing apparatus having a display means,
(a) displaying a password input screen on the display means;
(b) receiving a password input operation by a user in a state where the password input screen is displayed on the display means;
(c) determining a user's level of confidentiality based on the user's input operation mode when a password input operation is performed by the user ;
(d) authenticating the password by determining whether the password entered by the user matches a preset character string;
(e) with the password being authenticated in step (d), transitioning the display screen on the display means;
Have
The step (a) is provided by providing a handwriting input area on the password input screen,
Step (b) is capable of accepting a password input by a user's handwriting input operation performed on the handwriting input area,
The step (c) determines that the level of confidentiality of the user is equal to or higher than a predetermined level when a password handwritten to the handwriting input area is input to the inner peripheral edge of the handwriting input area,
Wherein step (e), when the level of the user's confidential intention is determined at the step (c) is a predetermined level or more, with that password before Symbol step (d) is authenticated, the password input screen display screen control method for a display screen for displaying by transitioning, and Turkey, wherein is displayed on the display unit in the display mode with a reduced visibility than ordinary display mode from. A display screen control method for controlling a display screen displayed on the display means in an image processing apparatus having a display means,
(a) displaying a password input screen on the display means;
(b) receiving a password input operation by a user in a state where the password input screen is displayed on the display means;
(c) determining a user's level of confidentiality based on the user's input operation mode when a password input operation is performed by the user ;
(d) authenticating the password by determining whether the password entered by the user matches a preset character string;
(e) with the password being authenticated in step (d), transitioning the display screen on the display means;
Have
In the step (a), a keyboard image in which a plurality of keys are arranged in a predetermined arrangement is provided and displayed on the password input screen, and the display size of the keyboard image can be changed based on a user operation. ,
The step (c) determines that the level of confidentiality of the user is equal to or higher than a predetermined level when a password is input in a state where the display size of the keyboard image is smaller than a predetermined size,
Wherein step (e), when the level of the user's confidential intention is determined at the step (c) is a predetermined level or more, with that password before Symbol step (d) is authenticated, the password input screen display screen control method for a display screen for displaying by transitioning, and Turkey, wherein is displayed on the display unit in the display mode with a reduced visibility than ordinary display mode from. A display screen control method for controlling a display screen displayed on the display means in an image processing apparatus having a display means,
(a) displaying a password input screen on the display means;
(b) receiving a password input operation by a user in a state where the password input screen is displayed on the display means;
(c) determining a user's level of confidentiality based on the user's input operation mode when a password input operation is performed by the user ;
(d) authenticating the password by determining whether the password entered by the user matches a preset character string;
(e) with the password being authenticated in step (d), transitioning the display screen on the display means;
Have
In the step (a), a keyboard image in which a plurality of keys are arranged in a predetermined arrangement is provided and displayed on the password input screen, and the display position of the keyboard image is within the display range of the display unit based on a user operation. Can be changed at
The step (c) determines that the level of confidentiality of the user is equal to or higher than a predetermined level when a password is input in a state where the keyboard image is located at a peripheral edge within the display range,
Wherein step (e), when the level of the user's confidential intention is determined at the step (c) is a predetermined level or more, with that password before Symbol step (d) is authenticated, the password input screen display screen control method for a display screen for displaying by transitioning, and Turkey, wherein is displayed on the display unit in the display mode with a reduced visibility than ordinary display mode from. A display screen control method for controlling a display screen displayed on the display means in an image processing apparatus having a display means,
(a) displaying a password input screen on the display means;
(b) receiving a password input operation by a user in a state where the password input screen is displayed on the display means;
(c) determining a user's level of confidentiality based on the user's input operation mode when a password input operation is performed by the user ;
(d) authenticating the password by determining whether the password entered by the user matches a preset character string;
(e) with the password being authenticated in step (d), transitioning the display screen on the display means;
Have
The step (a) provides and displays a keyboard image in which a plurality of keys are arranged in a predetermined arrangement on the password input screen, and a plurality of keys included in the keyboard image based on a user operation are the predetermined arrangement. Can be changed to a different array,
In the step (c), when a password is input in a state where a plurality of keys included in the keyboard image are changed to an arrangement different from the predetermined arrangement, the level of the user's confidentiality is equal to or higher than a predetermined level. Judgment,
Wherein step (e), when the level of the user's confidential intention is determined at the step (c) is a predetermined level or more, with that password before Symbol step (d) is authenticated, the password input screen display screen control method for a display screen for displaying by transitioning, and Turkey, wherein is displayed on the display unit in the display mode with a reduced visibility than ordinary display mode from. A display screen control method for controlling a display screen displayed on the display means in an image processing apparatus having a display means,
(a) displaying a password input screen on the display means;
(b) receiving a password input operation by a user in a state where the password input screen is displayed on the display means;
(c) determining a user's level of confidentiality based on the user's input operation mode when a password input operation is performed by the user ;
(d) authenticating the password by determining whether the password entered by the user matches a preset character string;
(e) with the password being authenticated in step (d), transitioning the display screen on the display means;
Have
In the step (a), the password input screen is provided with a keyboard image in which a plurality of keys are arranged in a predetermined arrangement and a password display field for displaying a password input by the user, and is displayed for a user operation. Based on the password display field can be switched to non-display,
The step (c) determines that the level of confidentiality of the user is equal to or higher than a predetermined level when a password is input in a state where the password display field included in the password input screen is switched to non-display,
Wherein step (e), when the level of the user's confidential intention is determined at the step (c) is a predetermined level or more, with that password before Symbol step (d) is authenticated, the password input screen display screen control method for a display screen for displaying by transitioning, and Turkey, wherein is displayed on the display unit in the display mode with a reduced visibility than ordinary display mode from. A display unit, an operation input unit for user interaction, the image processing apparatus having a detectable sensor the size of objects located in the vicinity of the surface of the operation input means, a display screen to be displayed on said display means A display screen control method for controlling,
(a) displaying a password input screen on the display means;
(b) receiving a password input operation by a user in a state where the password input screen is displayed on the display means;
(c) determining a user's level of confidentiality based on the user's input operation mode when a password input operation is performed by the user ;
(d) authenticating the password by determining whether the password entered by the user matches a preset character string;
(e) with the password being authenticated in step (d), transitioning the display screen on the display means;
Have
In the step (c), when a password input operation is performed by the user in a state where the password input screen is displayed, if an object of a predetermined size or more is detected by the sensor, It is determined that the level is equal to or higher than the predetermined level,
Wherein step (e), when the level of the user's confidential intention is determined at the step (c) is a predetermined level or more, with that password before Symbol step (d) is authenticated, the password input screen display screen control method for a display screen for displaying by transitioning, and Turkey, wherein is displayed on the display unit in the display mode with a reduced visibility than ordinary display mode from. (f) determining a security level of the password input in the step (b);
Further comprising
In the step (e), when the level of confidentiality of the user determined in the step (c) is a predetermined level or higher, or the security level of the password determined in the step (f) is a predetermined level or higher. In some cases, as the password is authenticated in the step (d), the display screen displayed by transitioning from the password input screen is changed to a display mode in which visibility is lower than a normal display mode. 26. The display screen control method according to claim 18, wherein the display screen is displayed on a means. A program executed in an image processing apparatus having a display unit, the image processing apparatus,
A program for executing the display screen control method according to any one of claims 18 to 26.

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