JP2014029645A - Display device and display program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device and a display program that maintain visibility of information other than specific information displayed on a display screen of a display panel for a third person other than an operator, and can reduce visibility of the specific information for the third person other than the operator.SOLUTION: In a display device 100, a specific display area setting unit 41 sets a display area for displaying predetermined specific information among plural display areas set to a display screen 11 of a display panel 1, as a specific display area. A backlight control unit 6 controls the brightness of each display area of the display screen 11 with the specific display area set. When a touch panel 2 detects a position of touch operation to an area of an operation surface 21 corresponding to the specific display area, the backlight control unit 6 makes the brightness of the specific display area lower than the brightness of the display areas other than the specific display area.

Description

  The present invention relates to a display device and a display program that have a display screen for displaying information and can adjust the luminance of the display screen for each display area.

  Used in public places where an unspecified number of people come and go, for example, information display devices, mobile phone devices, mail terminal devices, electronic money charging devices, personal digital assistants (PDAs), automatic cash transactions A device (ATM), an automatic teller machine (CD), and an electronic white board system used in a meeting or the like include a display panel such as a liquid crystal panel and a touch panel formed integrally with the display panel. The display apparatus comprised is comprised.

  In such a display device, information such as operation guidance information, advertisement information, and explanatory information for showing the contents of the conference to the viewer at the time of a meeting is displayed on the display screen of the display panel. The display device is configured to display input information based on the touch operation on the display screen by performing a touch operation on the touch panel in a state where the above information is displayed on the display screen.

  For example, in a display device provided in an automatic cash transaction apparatus, operation guidance information for guiding the contents of an operation of a cash transaction by a customer (operator) is displayed on a display screen of the display panel, and according to the operation guidance information, the customer A cash transaction can be performed by performing a touch operation.

  Further, in the display device provided in the electronic whiteboard system, the explanation information indicating the meeting contents of the meeting is displayed on the display screen of the display panel, and when the operator is explaining the contents of the meeting according to the explanation information, characters are displayed. Input information such as characters based on the locus of the touch operation can be displayed on the display screen.

  In the display device, the information displayed on the display screen of the display panel includes information such as personal information (hereinafter referred to as “specific information”) that a third party other than the operator cannot view. As a method of preventing such third information from being viewed by a third party other than the operator, a method of adjusting the viewing angle of the display screen of the display panel (see Patent Document 1), the brightness of the display screen of the display panel is adjusted. A method of adjusting (see Patent Document 2) is known.

  In the method disclosed in Patent Document 1, it is possible to prevent information displayed on the display screen from being viewed by a third party other than the operator by reducing the viewing angle of the display screen of the display panel. . Further, in the method disclosed in Patent Document 2, it is possible to prevent information displayed on the display screen from being viewed by a third party other than the operator by reducing the brightness of the display screen of the display panel. it can.

JP-A-10-240186 Japanese Patent Laid-Open No. 2005-4488

  For example, in an information display device or an electronic white board system, specific information displayed on the display screen of the display panel (for example, input information during input using the touch panel, personal information, etc.) is visually recognized by a third party other than the operator. However, other information displayed on the display screen (such as advertisement information for information display devices and explanatory information for electronic whiteboard systems) can be viewed by third parties other than the operator. There is a need to.

  In the methods disclosed in Patent Literatures 1 and 2, when the specific information displayed on the display screen of the display panel is prevented from being viewed by a third party other than the operator, the viewing angle of the entire display screen is reduced. (Patent Document 1), or lowering the brightness of the entire display screen (Patent Document 2), other information other than the specific information displayed on the display screen is also visually recognized by a third party other than the operator. Becomes difficult.

  The purpose of the present invention is to maintain the visibility by a third party other than the operator for other information other than the specific information displayed on the display screen of the display panel, and for the specific information other than the operator. To provide a display device and a display program capable of reducing visibility by a third party.

The present invention includes a display unit having a display screen in which a plurality of display areas for displaying information are set,
A detection unit that has an operation surface corresponding to the display screen and detects a position of the touch operation on the operation surface when a touch operation is performed on the operation surface;
A specific display area setting unit that sets a display area for displaying predetermined specific information as the specific display area among the plurality of display areas;
A luminance control unit that controls the luminance of each display area of the display screen, wherein the position of the touch operation detected by the detection unit corresponds to the specific display area when the specific display area is set A display comprising: a brightness control unit configured to lower the brightness of the specific display area lower than the brightness of the remaining display area other than the specific display area when the position is within the area of the operation surface; Device.

The present invention also includes a display unit having a display screen for displaying information;
A detection unit that has an operation surface corresponding to the display screen and detects a position of the touch operation on the operation surface when a touch operation is performed on the operation surface;
A determination unit that determines whether a touch operation performed on the operation surface is a predetermined touch operation based on a detection result by the detection unit;
When the determination unit determines that the touch operation performed on the operation surface is the specific touch operation, a specific display area having a predetermined shape and a remaining display area other than the specific display area A specific display area setting unit to be set on the display screen;
A luminance control unit that controls the luminance of each display area of the display screen, wherein the position of the touch operation detected by the detection unit corresponds to the specific display area when the specific display area is set A display comprising: a brightness control unit configured to lower the brightness of the specific display area lower than the brightness of the remaining display area other than the specific display area when the position is within the area of the operation surface; Device.

The display device of the present invention further includes an information erasing unit for erasing information displayed on the display screen,
The brightness control unit may make the brightness of each display area of the display screen the same when the information displayed in the specific display area is erased by the information erasing unit.

  In the display device of the present invention, the specific display area is an area for displaying personal information.

  In addition, the present invention is a program for operating the display device, which is a display program for causing a computer to function as each of the above-described units.

  According to the present invention, the display device includes a display unit, a detection unit, a specific display area setting unit, and a luminance control unit. The display unit has a display screen in which a plurality of display areas for displaying information are set. The detection unit has an operation surface corresponding to the display screen, and detects the position of the touch operation on the operation surface when the touch operation is performed on the operation surface. The specific display area setting unit sets, as the specific display area, a display area for displaying predetermined specific information among the plurality of display areas. The brightness control unit controls the brightness of each display area of the display screen in a state where the specific display area is set, and the detection unit detects the position of the touch operation with respect to the area of the operation surface corresponding to the specific display area Further, the luminance of the specific display area is set lower than the luminance of the remaining display areas other than the specific display area.

  In the display device configured as described above, on the display screen, the information displayed in the remaining display area other than the specific display area is maintained by the third party other than the operator, and the specific display area Visibility by a third party other than the operator for the specific information displayed on the screen can be reduced.

  According to the invention, the display device includes a display unit, a detection unit, a determination unit, a specific display area setting unit, and a luminance control unit. The display unit has a display screen for displaying information. The detection unit has an operation surface corresponding to the display screen, and detects the position of the touch operation on the operation surface when the touch operation is performed on the operation surface. The determination unit determines whether or not the touch operation performed on the operation surface is a predetermined touch operation based on the detection result by the detection unit. The specific display area setting unit sets a specific display area having a predetermined shape on the display screen when it is determined that the touch operation performed on the operation surface is the specific touch operation. The brightness control unit controls the brightness of each display area of the display screen in a state where the specific display area is set, and the detection unit detects the position of the touch operation with respect to the area of the operation surface corresponding to the specific display area Further, the luminance of the specific display area is set lower than the luminance of the remaining display areas other than the specific display area.

  In the display device configured as described above, on the display screen, the information displayed in the remaining display area other than the specific display area is maintained by the third party other than the operator, and the specific display area Visibility by a third party other than the operator for the specific information displayed on the screen can be reduced.

  According to the present invention, the display device further includes an information erasing unit that erases information displayed on the display screen. The luminance control unit controls the luminance of the display screen so that the luminance of each display area of the display screen becomes the same when the information erasing unit erases the information displayed in the specific display area. Thereby, when the specific information is not displayed in the specific display area, the luminance of the display screen can be made uniform, and the visibility of the information displayed on the display screen can be maintained in a high state.

  According to the present invention, the specific display area set on the display screen is an area for displaying personal information. In the display device of the present invention, when the information is displayed in the specific display area, the brightness control unit controls the brightness of the display screen so that the brightness of the specific display area is lowered. Is displayed in the specific display area, the visibility of this personal information by a third party other than the operator can be reduced.

  According to the present invention, the display program is a program for operating the display device and causing the computer to function as each of the above-described units. Such a display program maintains the visibility by a third party other than the operator for other information other than the specific information displayed on the display screen, and the third program for the specific information other than the operator. Display processing capable of reducing visibility by a person can be controlled by software.

It is a figure which shows the structure of the display apparatus 100 which concerns on 1st Embodiment of this invention. 4 is a flowchart showing operations related to display processing of the display device 100. It is a figure which shows the structure of the display apparatus 200 which concerns on 2nd Embodiment of this invention. 4 is a flowchart illustrating an operation related to display processing of the display device 200.

(Display device)
FIG. 1 is a diagram showing a configuration of a display device 100 according to the first embodiment of the present invention. The display device 100 according to the present embodiment is a display device provided in an information display device, for example, used in a public place where an unspecified number of people come and go. The display device 100 includes a display panel 1 as a display unit, a touch panel 2 as a detection unit, a backlight device 3, a display control unit 4, a touch panel control unit 5, and a backlight control unit 6 as a luminance control unit. It is comprised including.

  The display panel 1 is a liquid crystal display panel, for example. The display panel 1 is controlled by a display control unit 4 described later, and has a rectangular display screen 11 in which a plurality of display areas for displaying information are set. The display screen 11 is set with XY orthogonal coordinates. The orthogonal coordinates are set with the upper left vertex as the origin toward the display screen 11, the right direction being the positive direction of the X axis, and the downward direction being the positive direction of the Y axis. Coordinates.

  The touch panel 2 has an operation surface 21 corresponding to the display screen 11. Specifically, the touch panel 2 is provided so as to overlap the display screen 11 and is formed integrally with the display panel 1. The touch panel 2 has a rectangular operation surface 21 formed on the side opposite to the surface that contacts the display screen 11. When a touch operation is performed on the operation surface 21, the touch operation on the operation surface 21 is performed. Detect position. On the operation surface 21, XY orthogonal coordinates similar to those on the display screen 11 are set.

  The touch panel 2 includes a projected capacitive touch panel, a resistive film touch panel, an infrared cut-off detection touch panel, and the like. The touch panel 2 continuously detects the touched position while the touch operation (input operation) is performed on the operation surface 21 with a finger or the like, and the touch panel control unit 5 displays the position information indicating the touch position. Output to.

  Here, the touch operation is a series of operations on the operation surface 21 from the start of the contact to the operation surface 21 to the end of the contact. For example, when the operator touches the operation surface 21 with a pointing device such as a finger or a tablet pen and performs a series of operations to move the finger or pointing device away from the operation surface 21 without moving the contact point, that is, the operation When a touch operation is performed on the surface 21 without moving the contact point, this operation is a point input operation on the operation surface 21. For example, when the operator touches the operation surface 21 with a finger or a pointing device, moves the contact point while touching, and performs a series of operations for moving the finger or the pointing device away from the operation surface 21, that is, the operation When a touch operation involving movement of a contact point in the surface direction is performed on the surface 21, this operation is a line input operation on the operation surface 21.

  The backlight device 3 includes a direct type that emits light by arranging light sources such as cold cathode tubes and light emitting diodes (LEDs) on the bottom surface, and a transparent plate called a light guide plate. There is an edge light type that emits light to the front surface by dot printing or pattern shape provided on the back surface through the light from the edge of the light guide plate. The backlight device 3 of the present embodiment is a direct type device using a plurality of LEDs as light sources.

  The backlight device 3 is provided on the back side of the display panel 1 (the side opposite to the display screen 11), and irradiates the back surface of the display panel 1 with backlight light. The backlight device 3 includes a plurality of LEDs, and each of the plurality of LEDs is parallel to the Y coordinate axis by i in the row direction parallel to the X coordinate axis in the XY orthogonal coordinates set on the display screen 11 of the display panel 1. J in the column direction are arranged in a matrix as a whole.

  The touch panel control unit 5 detects the presence or absence of contact with the touch panel 2 and the coordinates of the touched position based on the position information output from the touch panel 2. Touch panel control unit 5 includes a contact detection unit 51, a position detection unit 52, and a time measurement unit 53.

  The contact detection unit 51 detects that there is contact with the touch panel 2 when position information is output from the touch panel 2, and does not have contact with the touch panel 2 when position information is not output from the touch panel 2. Is detected.

  When the contact detection unit 51 detects that there is contact with the touch panel 2, the position detection unit 52 performs an operation surface of a touch operation by contact with the operation surface 21 based on the position information output from the touch panel 2. The position coordinates indicating the contact position on 21 are detected.

  The time measuring unit 53 measures the elapsed time from when the specific state is reached. This measurement is performed until the specific state is not maintained or until a predetermined time elapses. Note that “when a specific state is reached” includes when the position detection unit 52 no longer detects position coordinates, or when the position detection unit 52 continuously detects the same position coordinates. It is done.

  The display control unit 4 controls the display of information on the display screen 11 of the display panel 1. The display control unit 4 includes a specific display area setting unit 41, an information erasing unit 42, a specific display area position register 43, a specific display area luminance register 44, and a display area luminance register 45.

  The specific display area setting unit 41 sets a display area for displaying predetermined specific information among the plurality of display areas set on the display screen 11 of the display panel 1 as the specific display area. Examples of the predetermined specific information (specific information) include personal information. Further, in the display screen 11, the remaining display areas other than the specific display area include advertisement information, search result display information (for example, information responded when a search operation is input to the specific display area), and the like. An area for displaying information is included.

  The information erasure unit 42 erases information displayed on the display screen 11 of the display panel 1. The specific display area position register 43 stores the position (coordinate position) on the display screen 11 of the specific display area set by the specific display area setting unit 41. The specific display area luminance register 44 stores the luminance set in the specific display area when the backlight control unit 6 to be described later controls the luminance of the display screen 11. The display area luminance register 45 stores the luminance set in the remaining display area other than the specific display area when the backlight control unit 6 controls the luminance of the display screen 11. The brightness stored in the specific display area brightness register 44 and the display area brightness register 45 is a predetermined value. When the brightness stored in the display area brightness register 45 is “100”, the specific display area brightness The luminance stored in the register 44 is “70”, for example.

  The backlight control unit 6 is a control unit that controls the irradiation state of the backlight light on the display panel 1 by the backlight device 3 and controls the luminance of the display screen 11 of the display panel 1. The backlight control unit 6 controls the luminance of each display region of the display screen 11 in a state where the specific display region is set by the specific display region setting unit 41, and controls the area of the operation surface 21 corresponding to the specific display region. When the touch panel 2 detects the position of the touch operation, the luminance value stored in the specific display area luminance register 44 and the display area luminance register 45 is read, and the luminance of the specific display area is displayed in the remaining areas other than the specific display area. Lower than the brightness of the area. The backlight control unit 6 recognizes the position (coordinate position) of the specific display area on the display screen 11 based on the coordinate position stored in the specific display area position register 43.

  In addition, the backlight control unit 6 releases the specific display region set by the specific display region setting unit 41 when the specific display region is not set by the specific display region setting unit 41 and the display control unit 4 releases the specific display region. In this case, the brightness of the display screen 11 is controlled so that the brightness of each display area on the display screen 11 is the same. That is, the backlight control unit 6 makes the luminance of the display screen 11 uniform in the above case.

  Next, the operation of the display device 100 of this embodiment will be described with reference to FIG. FIG. 2 is a flowchart showing operations related to display processing of the display device 100.

  In step S <b> 1, the touch panel control unit 5 is an area of the operation surface 21 corresponding to the specific display area in a state where the specific display area is set by the specific display area setting unit 41 based on the detection result by the contact detection unit 51. It is determined whether or not a touch operation on the inside has been started. When the touch panel control unit 5 determines that the touch operation on the area of the operation surface 21 corresponding to the specific display area has started, the process proceeds to step S2 and the touch operation on the area of the operation surface 21 corresponding to the specific display area. If it is determined that is not started, the process proceeds to step S4.

  In step S2, the backlight control unit 6 reads the luminance values stored in the specific display area luminance register 44 and the display area luminance register 45, and sets the luminance of the specific display area to the remaining display area other than the specific display area. Lower than brightness. Accordingly, in the display device 100, on the display screen 11 of the display panel 1, the information displayed in the remaining display area other than the specific display area is maintained by the third party other than the operator, The visibility by a third party other than the operator for the specific information displayed in the specific display area can be reduced.

  Next, in step S <b> 3, the display control unit 4 determines whether the information displayed in the specific display area has been deleted by the information deleting unit 42. When the display control unit 4 determines that the information displayed in the specific display area has been erased, the process proceeds to step S4, and when it is determined that the information displayed in the specific display area has not been erased. Returns to step S2.

  In step S4, the backlight control unit 6 controls the luminance of the display screen 11 so that the luminance of each display area of the display screen 11 is the same. Thus, the backlight control unit 6 displays the display screen 11 so that the brightness of each display area of the display screen 11 becomes the same when the information erasing unit 42 erases the information displayed in the specific display area. To control the brightness. Thereby, when the specific information is not displayed in the specific display area, the brightness of the display screen 11 can be made uniform, and the visibility of the information displayed on the display screen 11 can be maintained in a high state. .

  FIG. 3 is a diagram showing a configuration of a display device 200 according to the second embodiment of the present invention. The display device 200 of the present embodiment is similar to the display device 100 described above, and corresponding portions are denoted by the same reference numerals and description thereof is omitted. The display device 200 is configured similarly to the display device 100 except that the configuration of the display control unit 4A is different from the display control unit 4 of the display device 100.

  The display device 200 according to the present embodiment is a display device provided in an electronic white board system used in a meeting or the like.

  The display control unit 4 </ b> A included in the display device 200 controls the display of information on the display screen 11 of the display panel 1. The display control unit 4A includes a determination unit 41A, a specific display region setting unit 42A, an information erasing unit 43A, a specific display region position register 44A, a specific display region luminance register 45A, and a display region luminance register 46A. .

  The determination unit 41A determines whether or not the touch operation performed on the operation surface 21 is a predetermined specific touch operation based on the detection result regarding the touch operation on the operation surface 21 of the touch panel 2 by the touch panel control unit 5. Judging. The specific touch operation is a touch operation for setting a specific display area on the display screen 11 of the display panel 1.

  The specific display area setting unit 42A has a predetermined shape (for example, a rectangular shape) when the determination unit 41A determines that the touch operation performed on the operation surface 21 is the specific touch operation (specific touch operation). ) Is set on the display screen 11.

  The information erasing unit 43A erases information displayed on the display screen 11 of the display panel 1. The specific display area position register 44A stores the position (coordinate position) on the display screen 11 of the specific display area set by the specific display area setting unit 42A. The specific display area luminance register 45 </ b> A stores the luminance set in the specific display area when the backlight control unit 6 controls the luminance of the display screen 11. The display area luminance register 46 </ b> A stores the luminance set in the remaining display area other than the specific display area when the backlight control unit 6 controls the luminance of the display screen 11. The luminance stored in the specific display area luminance register 45A and the display area luminance register 46A is a predetermined value. When the luminance stored in the display area luminance register 46A is “100”, the specific display area luminance The brightness stored in the register 45A is, for example, “70”.

  Next, the operation of the display device 200 of this embodiment will be described with reference to FIG. FIG. 4 is a flowchart illustrating an operation related to display processing of the display device 200.

  In step a1, the determination unit 41A determines whether or not the touch operation performed on the operation surface 21 is a specific touch operation based on the detection result regarding the touch operation on the operation surface 21 of the touch panel 2 by the touch panel control unit 5. Determine whether. If the determination unit 41A determines that the specific touch operation has been performed on the operation surface 21, the process proceeds to step a2, and if it is determined that the specific touch operation has not been performed, step a1 is repeated.

  In step a2, the specific display area setting unit 42A sets a specific display area having a predetermined shape (for example, a rectangular shape) on the display screen 11.

  Next, in step a3, the touch panel control unit 5 operates the operation surface corresponding to the specific display area in a state where the specific display area is set by the specific display area setting unit 42A based on the detection result by the contact detection unit 51. It is determined whether or not a touch operation on the area 21 is started. When the touch panel control unit 5 determines that the touch operation on the area of the operation surface 21 corresponding to the specific display area has been started, the process proceeds to step a4 and the touch operation on the area of the operation surface 21 corresponding to the specific display area. If it is determined that is not started, the process proceeds to step a6.

  In step a4, the backlight control unit 6 reads the luminance values stored in the specific display area luminance register 45A and the display area luminance register 46A, and sets the luminance of the specific display area to the remaining display area other than the specific display area. Lower than brightness. Thus, in the display device 200, on the display screen 11 of the display panel 1, the information displayed in the remaining display area other than the specific display area is maintained by the third party other than the operator, The visibility by a third party other than the operator for the specific information displayed in the specific display area can be reduced. Further, since the brightness of the specific display area is low, when the operator performs a touch operation on the area of the operation surface 21 corresponding to the specific display area (when inputting information to be displayed in the specific display area) ), It is possible to reduce discomfort due to glare.

  Next, in step a5, the display control unit 4A determines whether or not the information displayed in the specific display area has been erased by the information erasing unit 43A. When the display control unit 4A determines that the information displayed in the specific display area has been erased, the process proceeds to step a6, and when the information displayed in the specific display area has not been deleted. Returns to step a4.

  In step a6, the backlight control unit 6 controls the brightness of the display screen 11 so that the brightness of each display area of the display screen 11 is the same. Thus, the backlight control unit 6 displays the display screen 11 so that the brightness of each display area of the display screen 11 becomes the same when the information erasing unit 43A erases the information displayed in the specific display area. To control the brightness. Thereby, when the specific information is not displayed in the specific display area, the brightness of the display screen 11 can be made uniform, and the visibility of the information displayed on the display screen 11 can be maintained in a high state. .

(Display program)
In the display devices 100 and 200, a display program for causing the respective units constituting the display devices 100 and 200 such as the display panel 1, the touch panel 2, the display control units 4 and 4A, the touch panel control unit 5 and the backlight control unit 6 to function is as follows. , A program that causes a computer to operate as the display devices 100 and 200. This display program can be recorded on a conventionally known computer-readable recording medium.

  By recording the display program on a recording medium, a recording medium on which program codes (execution format program, intermediate code program, source program, etc.) for executing processing based on the display program are recorded can be provided in a portable manner. it can.

  The recording medium may be a memory for the microcomputer to perform processing, for example, a program medium such as a ROM (Read Only Memory), or may be inserted into a program reading device provided as an external storage device in the computer. It may be a program medium that can be read.

  The program stored in the recording medium may be a system in which the microprocessor accesses the recording medium and executes the program, or the microprocessor reads the program code from the recording medium, and the read program code is the micro program. The program may be executed by being downloaded to the program storage area of the computer. It is assumed that this download program is stored in the main device in advance.

  Here, the program medium is a recording medium configured to be separable from the main body, and includes a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a flexible disk and a hard disk, a CD-ROM (Compact Disc-Read Only Memory). ), Optical disc systems such as MO (Magneto Optical disc), MD (Mini Disc), DVD (Digital Versatile Disc), IC (Integrated Circuit) cards (including memory cards), card systems such as optical cards, or mask ROM, It may be a medium that carries a fixed program including a semiconductor memory such as an EPROM (Erasable Programmable Read Only Memory), an EEPROM (registered trademark) (Electrically Erasable Programmable Read Only Memory), or a flash ROM.

  In addition, if the computer has a system configuration capable of connecting to a communication network including the Internet, the recording medium may be a medium that dynamically carries the program code so as to download the program code from the communication network. When the program is downloaded from the communication network as described above, the download program is stored in the main device in advance or installed from another recording medium. In addition, the display program can be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

DESCRIPTION OF SYMBOLS 1 Display panel 2 Touch panel 3 Backlight apparatus 4, 4A Display control part 5 Touch panel control part 6 Backlight control part 11 Display screen 21 Operation surface 41, 42A Specific display area setting part 41A Judgment part 42, 43A Information erasure part 43, 44A Specific display area position register 44, 45A Specific display area luminance register 45, 46A Display area luminance register 51 Touch detection unit 52 Position detection unit 53 Time measurement unit 100, 200 Display device

Claims (5)

A display unit having a display screen in which a plurality of display areas for displaying information are set;
A detection unit that has an operation surface corresponding to the display screen and detects a position of the touch operation on the operation surface when a touch operation is performed on the operation surface;
A specific display area setting unit that sets a display area for displaying predetermined specific information as the specific display area among the plurality of display areas;
A luminance control unit that controls the luminance of each display area of the display screen, wherein the position of the touch operation detected by the detection unit corresponds to the specific display area when the specific display area is set A display comprising: a brightness control unit configured to lower the brightness of the specific display area lower than the brightness of the remaining display area other than the specific display area when the position is within the area of the operation surface; apparatus. A display unit having a display screen for displaying information;
A detection unit that has an operation surface corresponding to the display screen and detects a position of the touch operation on the operation surface when a touch operation is performed on the operation surface;
A determination unit that determines whether a touch operation performed on the operation surface is a predetermined touch operation based on a detection result by the detection unit;
When the determination unit determines that the touch operation performed on the operation surface is the specific touch operation, a specific display area having a predetermined shape and a remaining display area other than the specific display area A specific display area setting unit to be set on the display screen;
A luminance control unit that controls the luminance of each display area of the display screen, wherein the position of the touch operation detected by the detection unit corresponds to the specific display area when the specific display area is set A display comprising: a brightness control unit configured to lower the brightness of the specific display area lower than the brightness of the remaining display area other than the specific display area when the position is within the area of the operation surface; apparatus. An information erasing unit for erasing information displayed on the display screen;
The brightness control unit makes the brightness of each display area of the display screen the same when the information displayed in the specific display area is erased by the information erasing unit. The display device described in 1.   The display device according to claim 1, wherein the specific display area is an area for displaying personal information.   A program for operating the display device according to any one of claims 1 to 4, wherein the program causes a computer to function as each of the above units.

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