JPWO2011125200A1 - Projector and password input method - Google Patents

Abstract

The control unit (10) displays a first keyboard image composed of a plurality of blocks each including a plurality of different symbols corresponding to each of the designation buttons of the input unit (11). When is pressed, the block corresponding to the specified button pressed is specified from among the blocks of the first keyboard. Thereafter, the control unit (10) arranges the same symbols as the symbols included in each block in the same arrangement form as the first keyboard, and each symbol included in each block and each designation button of the input unit (11). Displays the image of the second keyboard corresponding to the one-to-one, and when any of the designation buttons is pressed, the identified block and the symbol corresponding to the pressed designation button are identified, and the identified Recognize symbols as input characters.

Description

  The present invention relates to a projector that inputs a password using a virtual board represented by a software keyboard.

  Some projectors have an authentication function for performing user authentication using a password. When a projector having this authentication function is requested to enter a password at startup, and the character string entered by the user in response to the request matches a password registered in advance in the projector, the user performs an input operation. Accept.

  A software keyboard is used to enter the password. In this case, the image of the software keyboard is projected on the screen at startup. Using the remote controller, the user sequentially designates a character string as a password on the projected software keyboard, and confirms the designated character string.

  In order to facilitate the selection of characters on the software keyboard, a pointer such as a frame (a character that surrounds characters) or a cursor moves on the software keyboard in response to an input operation on the remote controller. It is like that. The user can recognize the currently selected character based on the display position of the pointer.

  However, in the password input method using the display such as the pointer as described above, a third party can know the password by watching the input process of the character string.

  Patent Document 1 discloses a projector that can select a character string of a password on a software keyboard without displaying a pointer. The projector includes an input unit, a storage unit, a projection display unit, and a control unit.

  The password is stored in the storage unit. The input unit is a remote controller and includes a plurality of designation buttons and a determination button.

  The projection display unit projects a password input image including a software keyboard onto the screen. The software keyboard has a configuration in which a plurality of different symbols are arranged in a matrix, and button symbols corresponding to the designation buttons of the input unit are arranged in association with the rows and columns of the symbols. The user can designate a row and a column where a desired symbol is located by using each designation button of the input unit.

  The control unit causes the projection display unit to project a password input image when the projector is activated.

  The user confirms the row and column where the symbol corresponding to the character to be entered is located on the password input image displayed on the screen, and uses the designation button of the input unit to confirm the confirmed row and column, respectively. specify. The control unit identifies a symbol on the software keyboard based on the row and column designated by the designation button, and recognizes the identified symbol as an input character. In this way, character input using the software keyboard is performed.

  When the input of the character string as the password is completed, the user presses the enter button on the input unit. When the determination button is pressed, the control unit determines whether or not the input character string matches the password stored in the storage unit. Only when the input character string matches the password, the control unit accepts an input operation.

  According to the projector described in Patent Document 1, characters can be input by designating a row and a column using a designation button without displaying a pointer on a software keyboard. It is difficult to know the letters.

JP 2008-305075 A

  However, in the projector described in Patent Document 1, the user designates a row and a column in which a desired symbol among a plurality of symbols arranged in a matrix is located with a designation button without displaying a pointer. Therefore, if the number of rows and columns is large, another symbol may be specified by mistake.

  In addition, since the input character string is displayed on the screen with a specific symbol such as an asterisk, the user cannot know which character of the input character string is an erroneous input. Therefore, the user may repeat the same erroneous input.

  An object of the present invention is to provide a projection display device and a password input method that can solve the above-described problems and can reliably specify characters to be input on a software keyboard.

In order to achieve the above object, a projector according to the present invention provides:
A projection unit for projecting an image;
A storage unit for storing the password;
An input unit including a determination button and a plurality of designation buttons;
When the projector is activated, a first image for inputting a password is projected by the projection unit, and an instruction indicating that any of the plurality of designation buttons is pressed from the input unit is received. A second image for inputting a password is projected by the projection unit, and then each time the instruction from the input unit is received, the image projected by the projection unit is the first and second images. A controller that switches between images,
The first image is composed of a plurality of blocks corresponding to the plurality of designation buttons, and includes a first keyboard in which a plurality of different symbols are arranged for each block.
In the second image, the same symbols as the symbols included in the plurality of blocks are arranged in the same arrangement form as the first keyboard, and each symbol included in each block and the plurality of designation buttons are paired. Including a corresponding second keyboard,
The controller is
When one of the plurality of designation buttons is pressed in a state where the first image is projected, a block corresponding to the pressed designation button is specified, and then the second image is projected. When one of the plurality of designation buttons is pressed in a state, the identified block and a symbol corresponding to the pressed designation button are identified,
When the determination button is pressed, the identified symbol is recognized as a character string in the order in which the instructions from the input unit are received, and the character string matches the password stored in the storage unit Only the operation is accepted.

The password input method of the present invention is a method of inputting a password using a plurality of designation buttons,
A plurality of blocks corresponding to each of the plurality of designation buttons; a first keyboard on which a plurality of different symbols are arranged for each of the blocks;
When one of the plurality of designation buttons is pressed, a block corresponding to the pressed designation button is identified,
The same symbols as the symbols included in the plurality of blocks are arranged in the same arrangement form as the first keyboard, and each symbol included in each block and the plurality of designation buttons correspond one-to-one. Display the keyboard image,
When any one of the plurality of designation buttons is pressed, a symbol corresponding to the identified block and the pressed designation button is identified, and the identified symbol is recognized as an input character.

1 is a block diagram illustrating a configuration of a projector that is an embodiment of the present invention. FIG. It is a schematic diagram which shows an example of the remote controller of the projector shown in FIG. It is a figure which shows the button function correspondence table of the remote controller shown in FIG. It is a schematic diagram which shows a 1st password input screen. It is a schematic diagram which shows a 2nd password input screen. It is a schematic diagram which shows the example of a character input column. It is a flowchart which shows one procedure of a user authentication process. It is a figure for demonstrating the specific example of the input procedure of a password.

DESCRIPTION OF SYMBOLS 10 Control part 11 Input part 12 Storage part 13 Projection part

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of a projector according to an embodiment of the present invention.

  Referring to FIG. 1, the projector includes a control unit 10, an input unit 11, a storage unit 12, and a projection unit 13.

  The input unit 11 is an operation unit or a remote controller of the projector main body, and includes a plurality of designation buttons, a determination button, and the like. FIG. 2 shows an example of a remote controller.

  As shown in FIG. 2, the remote controller has four designation buttons 111 to 114, an enter button 115, and a return button 116.

  The designation buttons 111 to 114 are buttons for designating up, down, left, and right four directions. The designation button 111 designates the upward direction, the designation button 112 designates the downward direction, the designation button 113 designates the right direction, and the designation button 114 designates the left direction.

  The decision button 115 is a button for confirming the input character string and determining various instructions input by the user. The return button 116 is a button for returning from the current screen to the previous screen (or a predetermined screen).

  The input unit 2 is not limited to the remote controller shown in FIG. The type and number of buttons can be changed as appropriate.

  The storage unit 12 stores data and programs for operating each function of the projector. For example, authentication information related to the user authentication function is stored in the storage unit 12. The authentication information includes a password, password input screen information, a button function correspondence table, a designation button / block correspondence table, a designation button / symbol correspondence table, and the like. The password is registered in advance by the user.

  FIG. 3 shows an example of the button function correspondence table of the remote controller shown in FIG. This button function correspondence table stores a button symbol for identifying a button and a function (or name) of the button in association with each other. Button symbols and functions are stored in the button function correspondence table for each of the designation buttons 111 to 14, the determination button 115, and the return button 116. The button symbol indicates a display form in which the shape of the corresponding button is reflected. Specifically, as shown in FIG. 2, the designation button 111 is a black triangular button, and therefore, the button symbol is in a black triangular display form.

  The password input screen information includes information (image) of the first password input screen and information (image) of the second password input screen.

  FIG. 4 schematically shows a first password input screen. The first password input screen has a software keyboard 20 and an input character field 30. The software keyboard 20 is composed of four blocks 21 to 24 arranged vertically and horizontally.

  In the block 21, a button symbol (up button) corresponding to the designation button 11 is arranged in the center, and four symbols “0”, “1”, “2”, “3” are arranged around it. It is.

  In the block 22, a button symbol (down button) corresponding to the designation button 12 is arranged at the center, and four symbols "C", "D", "E", and "F" are arranged around it. It is.

  In the block 23, a button symbol (right button) corresponding to the designation button 13 is arranged in the center, and four symbols "8", "9", "A", and "B" are arranged around it. It is.

  In the block 24, a button symbol (left button) corresponding to the designation button 14 is arranged in the center, and four symbols “4”, “5”, “6”, and “7” are arranged around it. It is.

  In the input character column 30, a cursor indicating a character input position is displayed, and the input character is displayed by a specific symbol such as an asterisk.

  FIG. 4 schematically shows the second password input screen. This second password input screen is obtained by subdividing the four blocks 21 to 24 of the first password input screen shown in FIG. 3 into four blocks, upper, lower, left and right for each symbol. In FIG. 4, for the sake of convenience, a dotted line indicating the boundary between the blocks 21 to 24 is shown, but this dotted line is not displayed on the actual screen.

  The block 21 includes an upper block including a button symbol (up button) corresponding to the designation button 11 and a symbol “0”, and a lower block including a button symbol (lower button) corresponding to the designation button 12 and a symbol “1”. And a right block including a button symbol (right button) corresponding to the designation button 13 and the symbol “2”, and a left block including a button symbol (left button) corresponding to the designation button 14 and the symbol “3”. . The arrangement form of the upper, lower, left and right buttons of these blocks is the same as the arrangement form of the designation buttons 111 to 114 of the input unit 11.

  The block 22 includes an upper block including a button symbol (up button) corresponding to the designation button 11 and a symbol “C”, and a lower block including a button symbol (lower button) corresponding to the designation button 12 and a symbol “F”. A right block including a button symbol (right button) corresponding to the designation button 13 and the symbol “E”, and a left block including a button symbol (left button) corresponding to the designation button 14 and the symbol “D”. . The arrangement form of the upper, lower, left and right buttons of these blocks is the same as the arrangement form of the designation buttons 111 to 114 of the input unit 11.

  The block 23 includes an upper block including a button symbol (up button) corresponding to the designation button 11 and the symbol “8”, and a lower block including a button symbol (lower button) corresponding to the designation button 12 and the symbol “B”. And a right block including a button symbol (right button) corresponding to the designation button 13 and the symbol “A”, and a left block including a button symbol (left button) corresponding to the designation button 14 and the symbol “9”. . The arrangement form of the upper, lower, left and right buttons of these blocks is the same as the arrangement form of the designation buttons 111 to 114 of the input unit 11.

  The block 24 includes a button block (up button) corresponding to the designation button 11 and a symbol “4”, and a button block (bottom button) corresponding to the designation button 12 and a bottom block including the symbol “7”. And a right block including a button symbol (right button) corresponding to the designation button 13 and the symbol “6”, and a left block including a button symbol (left button) corresponding to the designation button 14 and the symbol “5”. . The arrangement form of the upper, lower, left and right buttons of these blocks is the same as the arrangement form of the designation buttons 111 to 114 of the input unit 11.

  The designation button / block correspondence table is a table in which the identifiers of the designation buttons 111 to 114 and the identifiers of the blocks 21 to 24 correspond to each other on a one-to-one basis. By referring to this designation button / block correspondence table, the control unit 10 can specify a block corresponding to the designated button that is pressed among the designation buttons 111 to 114.

  The designation button / symbol correspondence table is a table in which for each block of blocks 21 to 24, the identifier of each symbol arranged in that block and the identifier of each of designation buttons 111 to 114 are stored in one-to-one correspondence. is there. By referring to this designation button / symbol correspondence table, the control unit 10 identifies the symbol corresponding to the designation button pressed among the designation buttons 111 to 114 from among the symbols arranged in the identified block. can do.

  Reference is again made to FIG. The projection unit 13 projects an image on a screen (or a projection surface such as a wall) (not shown), and is formed of, for example, a light source, a liquid crystal panel irradiated with light from the light source, and a liquid crystal panel. And a projection optical system that projects the image light on the screen (or a projection surface such as a wall). An existing projector configuration can be applied to the projection unit 13.

  The control unit 10 operates according to a program stored in the storage unit 12 and provides various functions of the projector. The control unit 10 executes user authentication processing when the projector is activated. Since the functions other than the user authentication function are the same as those of the existing program, the user authentication function will be described in detail here, and the description of the other functions will be omitted. Note that the user authentication process may be executed not only at the time of activation but also at a predetermined timing (for example, when returning from the sleep mode in which the operation is temporarily stopped).

  When performing user authentication, the control unit 10 causes the projection unit 13 to project the first password input screen. When any one of the designation buttons 111 to 114 of the input unit 11 is pressed, the control unit 10 is pressed. The block corresponding to the designation button is specified from among the blocks 21 to 24, and the second password input screen is projected by the projection unit 13 instead of the first password input screen.

  When any one of the designation buttons 111 to 114 of the input unit 11 is pressed after the projection of the second password input screen, the control unit 10 identifies the symbol corresponding to the pressed designation button as described above. The block is identified from each symbol, and the identified symbol is recognized as an input character. Then, the control unit 10 displays the recognized character as a specific symbol (asterisk) in the input character column 30 and displays the first password input screen on the projection unit 13 instead of the second password input screen. To project.

  In this way, the control unit 10 recognizes an input character while switching the screen projected by the projection unit 13 in accordance with an input operation using the designation buttons 111 to 114 of the input unit 11. Each time an input character is recognized, a specific symbol is displayed in the character input field 30. For example, when the first input character is recognized, an asterisk is displayed at the left end of the character input field 30 as shown in FIG. 6, and the cursor moves to the next character input position (to the right of the displayed asterisk). .

  Further, when the determination button 115 of the input unit 11 is pressed, the control unit 10 recognizes the input characters recognized through the input operation using the designation buttons 111 to 114 as a character string in the recognized order. Then, the control unit 10 determines whether or not the character string matches the password stored in the storage unit 12, and performs an input operation (specifically, a function other than user authentication) only when the character string matches. Operation).

  Further, when the return button 116 of the input unit 11 is pressed, the control unit 10 returns the input state recognized through the input operation using the designation buttons 111 to 114 from the current state to the previous input state.

  Next, the user authentication operation of the projector of this embodiment will be specifically described.

  FIG. 7 shows one procedure of the user authentication process.

  Referring to FIG. 7, first, the control unit 10 determines whether or not an activation button (not shown) for activating the projector has been pressed (step S10).

  When the start button is pressed, the control unit 10 reads information on the first password input screen from the storage unit 12 and causes the projection unit 13 to project an image of the first password input screen (step S11). .

  After displaying the first password input screen, the control unit 10 determines whether any of the designation buttons 111 to 114 of the input unit 11 has been pressed (step S12).

  When any one of the designation buttons 111 to 114 is pressed, the control unit 10 specifies a block corresponding to the pressed designation button and replaces the first password input screen with the second password input. The screen image is projected by the projection unit 13 (step S13).

  After displaying the second password input screen, the control unit 10 determines whether any of the designation buttons 111 to 114 of the input unit 11 has been pressed (step S14).

  When any one of the designation buttons 111 to 114 is pressed, the control unit 10 identifies the symbol corresponding to the pressed designation button from the symbols arranged in the block identified in step S13, and Recognize the specified symbol as an input character. And the control part 10 displays a specific symbol (asterisk) on the input character column 30 (step S15).

  Next, the control unit 10 causes the projection unit 13 to project the first password input screen instead of the second password input screen (step S16).

  After displaying the first password input screen, the control unit 10 determines whether any one of the determination button 115 or the designation buttons 111 to 114 of the input unit 11 is pressed (step S17). If any one of the designation buttons 111 to 114 is pressed, the process of step S13 is executed again.

  When the enter button 115 is pressed in step S17, the control unit 10 recognizes the characters recognized through the input operation using the designation buttons 111 to 114 as the input character string in the recognized order, and the input character string. Is compared with the password stored in the storage unit 12 (step S18). And the control part 10 receives input operation, only when an input character string corresponds with a password (step S19-S20).

  If the recognized input character string does not match the password stored in the storage unit 12 in step S19, the control unit 10 projects a message image indicating that the input character string does not match the password on the projection unit 13. (Step S21).

  FIG. 8 is a diagram for explaining a specific example of the password input procedure. In this example, the character string “F709CA” is input as the password.

  When inputting the first character “F”, first, the user presses the designation button 112 while the first password input screen shown in FIG. 4 is displayed. Thereby, the block 22 is selected. Next, the user presses the designation button 112 while the second password entry screen shown in FIG. 5 is displayed. As a result, the symbol “F” in the block 22 is selected.

  When inputting the second character “7”, the user presses the designation button 114 while the first password input screen shown in FIG. 4 is displayed. Thereby, the block 24 is selected. Next, the user presses the designation button 112 while the second password entry screen shown in FIG. 5 is displayed. As a result, the symbol “7” in the block 24 is selected.

  For the third to sixth characters, a block and a symbol are selected in the same procedure as described above.

  Thereafter, when the user presses the enter button 115, “F709CA” is recognized as the input character string. The character string “F709CA” is compared with the password stored in the storage unit 12.

  According to the above user authentication process, the first password input screen is displayed at the time of activation. The user selects a block including a symbol corresponding to a character to be input from among the blocks 21 to 24 arranged vertically and horizontally on the first password input screen.

  In selecting the block, the designation buttons 111 to 114 of the input unit 11 are used. The arrangement form of the button symbols of the blocks 21 to 24 is the same as the arrangement form of the designation buttons 111 to 114 of the input unit 11. Therefore, the user can intuitively select a block using the designation buttons 111 to 114 of the input unit 11.

  When the block is selected, a second password input screen is displayed. In the second password input screen, the symbols of the blocks 21 to 24 displayed on the first password input screen are displayed in the same arrangement form, but each of the blocks 21 to 24 has a one-to-one symbol and a button symbol. It is subdivided into corresponding upper, lower, left and right blocks. The arrangement form of the button symbols of the upper, lower, left and right blocks in each of the blocks 21 to 24 is the same as the arrangement form of the designation buttons 111 to 114 of the input unit 11. Therefore, the user can intuitively select a symbol using the designation buttons 111 to 114 of the input unit 11. As described above, the user can intuitively input the symbols corresponding to the characters to be input using the designation buttons 111 to 114 of the input unit 11.

  As described above, according to the projector of the present embodiment, the user can intuitively select blocks and symbols using the designation buttons 111 to 114 of the input unit 11. Characters can be input more easily and accurately than the projector that designates characters by designating rows and columns on the software keyboard described.

  In addition, since the character input process is not displayed, it is possible to suppress the input character string from being known to a third party.

(Other embodiments)
Although the projector which is other embodiment of this invention also has the control part 10, the input part 11, the memory | storage part 12, and the projection part 13 which were shown in FIG. 1, a part of operation | movement of user authentication differs from embodiment mentioned above. .

  The projection unit 13 projects an image. The password is stored in the storage unit 12. The input unit 11 includes a determination button and a plurality of designation buttons.

  When the projector is activated, the control unit 10 causes the projection unit 13 to project a first image for inputting a password, and receives an instruction from the input unit 11 indicating that one of the designation buttons has been pressed. And the second image for inputting the password is projected by the projection unit 13, and then the image projected by the projection unit 13 is received each time the instruction from the input unit 11 is received. Switch between two images.

  The first image includes a plurality of blocks corresponding to the respective designation buttons of the input unit 11, and includes a first keyboard in which a plurality of different symbols are arranged for each block. In the second image, the same symbols as the symbols included in the plurality of blocks are arranged in the same arrangement form as the first keyboard. Each symbol included in each block and each designation button of the input unit 11 Are provided with a second keyboard corresponding one-to-one.

  When any one of the designation buttons of the input unit 11 is pressed in a state where the first image is projected, the control unit 10 assigns a block corresponding to the pressed designation button to each block of the first keyboard. Identify from Thereafter, when any one of the designation buttons of the input unit 11 is pressed in a state where the second image is projected, a symbol corresponding to the pressed designation button is displayed on the specified block of the second keyboard. Identify from each of the symbols.

  When the determination button of the input unit 11 is pressed, the control unit 10 recognizes the specified symbols as a character string in the order in which the instructions from the input unit 11 are received, and the character string is stored in the storage unit 14. The operation is accepted only when it matches the entered password.

  In the other embodiment, the first keyboard has a plurality of first button symbols corresponding to each of the designation buttons of the input unit 11, and these first button symbols are paired with the plurality of blocks. They may be arranged so as to correspond to each other.

  In the above case, the plurality of first button symbols may be arranged in the same arrangement form as each designation button of the input unit 11.

  Furthermore, the number of symbols arranged in each of the plurality of blocks may be the same as the number of designation buttons of the input unit 11.

  In the other embodiment, the second keyboard has a plurality of second button symbols corresponding to each of the designated buttons of the input unit 11 for each area corresponding to each of the blocks. The second button symbol may be arranged so as to have a one-to-one correspondence with each symbol arranged in each block.

  In the above case, the plurality of second button symbols provided for each area corresponding to each block may be arranged in the same arrangement form as each designation button of the input unit 11.

  According to the projector of the other embodiment described above, the user can select a block or a symbol alternatively by using the designation button of the input unit 11, which is described in Patent Document 1 described above. In addition, characters can be input more easily and accurately than a projector that designates characters by designating rows and columns on a software keyboard.

  In addition, since the character input process is not displayed, it is possible to suppress the input character string from being known to a third party.

  The projectors of the embodiments described above are examples of the present invention, and changes that can be considered by those skilled in the art can be applied to the configurations and operations without departing from the spirit of the invention.

Claims (8)

A projector having a projection unit for projecting an image,
A storage unit for storing the password;
An input unit including a determination button and a plurality of designation buttons;
When the projector is activated, a first image for inputting a password is projected by the projection unit, and an instruction indicating that any of the plurality of designation buttons is pressed from the input unit is received. A second image for inputting a password is projected by the projection unit, and then each time the instruction from the input unit is received, the image projected by the projection unit is the first and second images. A controller that switches between images,
The first image is composed of a plurality of blocks corresponding to the plurality of designation buttons, and includes a first keyboard in which a plurality of different symbols are arranged for each block.
In the second image, the same symbols as the symbols included in the plurality of blocks are arranged in the same arrangement form as the first keyboard, and each symbol included in each block and the plurality of designation buttons are paired. Including a corresponding second keyboard,
The controller is
When one of the plurality of designation buttons is pressed in a state where the first image is projected, a block corresponding to the pressed designation button is specified, and then the second image is projected. When one of the plurality of designation buttons is pressed in a state, the identified block and a symbol corresponding to the pressed designation button are identified,
When the determination button is pressed, the identified symbol is recognized as a character string in the order in which the instructions from the input unit are received, and the character string matches the password stored in the storage unit Only accept the operation of the projector.   The first keyboard has a plurality of first button symbols corresponding to the plurality of designation buttons, respectively, and the first button symbols are arranged to correspond to the plurality of blocks on a one-to-one basis. The projector according to claim 1.   The projector according to claim 2, wherein the plurality of first button symbols are arranged in the same arrangement form as the plurality of designation buttons.   The projector according to any one of claims 1 to 3, wherein the number of symbols arranged in each of the plurality of blocks is the same as the number of the plurality of designation buttons.   The second keyboard has, for each area corresponding to each of the plurality of blocks, a plurality of second button symbols corresponding to the plurality of designation buttons, and the second button symbols are The projector according to any one of claims 1 to 4, wherein the projector is disposed so as to correspond to each symbol disposed in each of the plurality of blocks on a one-to-one basis.   The projector according to claim 5, wherein the plurality of second button symbols provided for each of the areas corresponding to each of the plurality of blocks are arranged in the same arrangement form as the plurality of designated buttons. . Each of the first and second images has an input character display field for displaying input characters,
The projector according to any one of claims 1 to 6, wherein the control unit displays the specified symbol in the input character display field with a specific character. A method of entering a password using a plurality of designation buttons,
A plurality of blocks corresponding to each of the plurality of designation buttons; a first keyboard on which a plurality of different symbols are arranged for each of the blocks;
When one of the plurality of designation buttons is pressed, a block corresponding to the pressed designation button is identified,
The same symbols as the symbols included in the plurality of blocks are arranged in the same arrangement form as the first keyboard, and each symbol included in each block and the plurality of designation buttons correspond one-to-one. Display the keyboard image,
A password input method in which, when any one of the plurality of designation buttons is pressed, the specified block and a symbol corresponding to the pressed specification button are specified, and the specified symbol is recognized as an input character.

Images