JP2015170291A - display device, display method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it easy for a user to refer to information displayed on each of display surfaces when there is a plurality of display surfaces observed by the user.SOLUTION: A display device 10 includes: a first display surface 131 on the front face; and a second display surface 132 on the back face. The display device 10 displays a first screen R1 by using the first display surface 131 and displays a second screen R2 by using the second display surface 132. In addition, the display device 10 performs transmission display of the second screen R2 by using the first display surface 131 when the first screen R1 is displayed. In transmission display, the display device 10 selectively performs transmission display in a non-inverting mode of displaying a transmission image R2t where the transmissivity of the second screen R2 is increased or an inverting mode of displaying the second screen R2 by the first display surface 131 while inverting the second screen R2 in a longitudinal direction and increasing transmissivity.

Description

  The present invention relates to a screen display using a plurality of display surfaces.

  2. Description of the Related Art There is a technique for controlling screen display on the front surface (Omenen) on the user's observation side based on an operation input on the back surface in a portable terminal device that is used by the user in hand (for example, Patent Literature) 1, 2). Patent Document 1 discloses that when an operation key arranged on the back side is operated, an image of the operation key displayed on the display surface on the front side is changed. Patent Document 2 discloses that a button is displayed on a display panel provided on the front side of the device, and an operation using the button is detected by a sensor provided on the back side.

JP 2011-254554 A JP 2003-330611 A

In the techniques disclosed in Patent Documents 1 and 2, the back side is a part where a means for detecting an operation input is provided in advance, and is not intended to be observed by the user.
On the other hand, an object of the present invention is to make it easy for a user to refer to information displayed on each display surface when there are a plurality of display surfaces observed by the user.

  In order to solve the above-described problems, a display device of the present invention includes a display unit including a first display surface and a second display surface, and a first display control unit that displays a first screen using the first display surface. A second display control unit that displays a second screen using the second display surface, and a transparent display of the second screen using the first display surface when the first screen is displayed. A third display control unit for performing

In the display device of the present invention, the third display control unit may perform the transmissive display on the second screen reversed in a predetermined direction.
In the display device of the present invention, the third display control unit may perform the transmissive display on the second screen displayed on the second display surface.
In the display device of the present invention, the third display control unit performs the transmissive display of the second screen reversed in a predetermined direction and the transmissive display of the second screen displayed on the second display surface. It may be performed selectively.

In the display device of the present invention, the third display control unit may change the transparency of the second screen on which the transmissive display is performed stepwise in accordance with an operation performed by the user.
In the display device according to the aspect of the invention, the first display surface is larger than the second display surface, and the third display control unit is configured to display the transmissive display in a region that is not displayed on the second display surface in the second screen. May be performed.
In the display device of the present invention, the first display surface is larger than the second display surface, and the third display control unit performs the transparent display according to an operation performed by a user. The display position of may be changed.
In the display device of the present invention, the first display surface and the second display surface may face opposite to each other.

  The display method of the present invention is a display method for displaying an image on a display unit including a first display surface and a second display surface, the step of displaying a first screen using the first display surface, A step of displaying a second screen using a second display surface; and a step of performing a transparent display of the second screen using the first display surface when the first screen is displayed.

  The program of the present invention uses the first display surface to display a first screen on a computer that controls the display unit including the first display surface and the second display surface, and uses the second display surface. The program for executing the step of displaying the second screen and the step of performing transparent display of the second screen using the first display surface when the first screen is displayed.

  ADVANTAGE OF THE INVENTION According to this invention, when there are multiple display surfaces observed by a user, it can make it easy for a user to refer the information displayed on each display surface.

The top view which shows the external appearance structure of the display apparatus which concerns on one Embodiment of this invention. The block diagram which shows the hardware constitutions of the display apparatus which concerns on the same embodiment. The figure which shows the example of a screen which the display apparatus which concerns on the same embodiment displays. The figure which shows the example of a display of the transmissive display which the display apparatus which concerns on the same embodiment performs. The functional block diagram which shows the function structure of the control part of the display apparatus which concerns on the same embodiment. The flowchart which shows a process when the display apparatus which concerns on the embodiment displays a screen. The figure which shows the example of a screen which the display apparatus which concerns on the same embodiment displays (non-inversion mode). The figure which shows the example of a screen which the display apparatus which concerns on the same embodiment displays (inversion mode). The flowchart which shows the process which the display apparatus which concerns on the modification of this invention performs regarding the change of the display position of a 2nd screen. The figure which shows the example of a screen regarding the change of the display position of the 2nd screen in the display apparatus which concerns on the modification. The flowchart which shows the process which the display apparatus which concerns on the modification performs regarding the change of the transparency. The figure which shows the example of a screen regarding the change of the transparency in the display apparatus which concerns on the modification. The figure which shows the example of a screen when the display apparatus which concerns on the modification displays the 2nd screen of a magnitude | size size rather than a 2nd display surface.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view showing an external configuration of the display device 10. FIG. 1A is a front view of the display device 10. FIG. 1B is a rear view of the display device 10. In the following description, the vertical and horizontal directions in the display device 10 coincide with the vertical and horizontal directions in the drawing.
The display device 10 is a display device that employs a touch panel, and here is a smartphone. The display device 10 has a substantially rectangular parallelepiped configuration. The display device 10 has a rectangular first display surface 131 on the front and two rectangular second display surfaces 132 on the back as two independent display surfaces. For this reason, the first display surface 131 and the second display surface 132 face each other in the opposite direction. The vertical dimension of the first display surface 131 is larger than the vertical dimension of the second display surface 132. The horizontal dimension of the first display surface 131 is the same as the horizontal dimension of the second display surface 132. The upper left corner point P1 of the first display surface 131 when the display device 10 is viewed from the front and the upper right corner point P2 of the second display surface 132 when the display device 10 is viewed from the back are the first display surface 131. (Or the second display surface 132) overlap in the normal direction.
Furthermore, the display device 10 includes a contact sensor 121 overlaid on the entire first display surface 131 and a contact sensor 122 overlaid on the entire second display surface 132.

FIG. 2 is a block diagram illustrating a hardware configuration of the display device 10. As illustrated in FIG. 2, the display device 10 includes a control unit 11, a sensor unit 12, a display unit 13, a communication unit 14, and a storage unit 15.
The control unit 11 includes a microcomputer having an arithmetic processing device including a CPU (Central Processing Unit) and a main memory including a ROM (Read Only Memory) and a RAM (Random Access Memory). For example, the CPU controls each unit of the display device 10 by reading a program stored in the ROM or the storage unit 15 into the RAM and executing the program.

  The sensor unit 12 includes a contact sensor 121 and a contact sensor 122. The contact sensor 121 is a sensor that detects an operation (here, a contact operation) that indicates a position on the first display surface 131. The contact sensor 122 is a sensor that detects an operation (here, a contact operation) that indicates a position on the second display surface 132. The contact sensors 121 and 122 output an operation signal indicating a position instructed using an indicator (typically, a user's finger) to the control unit 11. The contact sensors 121 and 122 are configured using, for example, capacitance type sensors, but may be configured using other types of sensors such as a resistance film type sensor and an infrared light type sensor.

The display unit 13 is configured using, for example, a liquid crystal display, and includes a first display surface 131 and a second display surface 132. For example, the display unit 13 individually has a VRAM (Video RAM) that is a storage area for displaying an image on the first display surface 131 and a VRAM that is a storage area for displaying an image on the second display surface 132. Have.
Unless otherwise specified in the following description, the first screen is a screen displayed on the first display surface 131, and the second screen is a screen displayed on the second display surface 132.

The communication unit 14 includes, for example, a wireless communication circuit and an antenna, and is an interface that communicates by connecting to a network. The storage unit 15 is a storage device such as an EEPROM (Electronically Erasable and Programmable ROM) or a flash memory. The storage unit 15 stores, for example, a control program executed by the control unit 11 and various application programs installed in the display device 10.
In addition to the configuration shown in FIG. 1, the display device 10 has a configuration common to general-purpose smartphones.

  FIG. 3 is a diagram illustrating an example of a screen displayed by the display device 10. FIG. 3A is a diagram showing a first screen R1 displayed using the first display surface 131 and a second screen R2 displayed using the second display surface 132. The first screen R1 and the second screen R2 are operation screens that are displayed when the user performs an operation on the display device 10. The operation screen is, for example, the home screen (or desktop screen) of the display device 10, but is not limited to this example.

  The first screen R1 is a screen on which icons I1 to I9 are arranged. Each of the icons I <b> 1 to I <b> 9 is an object that represents an application program installed in the display device 10. Each of the icons I1 to I9 can be operated by the user, and is operated when the corresponding application program is executed. The second screen R2 is a screen on which the window W is arranged. The window W is an object that represents a clock function. The window W is also an object that can be operated by the user.

  The display device 10 has a function of transparently displaying the second screen when displaying the first screen using the first display surface 131. The transparent display of the second screen is performed, for example, by performing a transparent process for making at least one of the first screen and the second screen translucent and displaying the first screen and the second screen in an overlapping manner. Further, as a transmissive display mode, there are a non-inversion mode in which the second screen is not inverted (that is, non-inversion) and an inversion mode in which the second screen is inverted in a predetermined direction. In other words, the inversion mode is a mode for transparently displaying a mirror image of the second screen.

FIG. 4 is a diagram illustrating a display example of transmissive display performed by the display device 10. FIG. 4 shows an example in which the second screen R2 is transparently displayed during the display of the first screen R1 described in FIG. 4A corresponds to the non-inversion mode, and FIG. 4B corresponds to the inversion mode. In FIG. 4 and each diagram described below, the area where the transmissive display is performed is represented by using a halftone. In addition, in the first screen, the area where the transparent display of the second screen is performed is represented by a broken line, and the other areas are represented by a solid line.
As shown in FIG. 4A, in the non-inversion mode, a transparent image R2t representing the second screen R2 is displayed so as to overlap the first screen R1. The transmission image R2t is equal to an image in which the transparency of the second screen R2 is increased. The window Wt is apparently the same as the window W except that the transparency is different. Here, the transparent image R2t is arranged in a hierarchy on the user side with respect to the first screen R1. As shown in FIG. 4B, in the reverse mode, a transparent image R2t obtained by inverting the second screen R2 in the left-right direction is displayed so as to overlap the first screen R1. The transmissive image R2t is equivalent to an image obtained by horizontally inverting the second screen R2 and further increasing the transparency of the second screen R2. The window Wt is the same as an image obtained by horizontally inverting the window W and further changing the transparency.
Regardless of the transmissive display mode, the display device 10 performs transmissive display in an area of the first display surface 131 that overlaps the second display surface 132.

Next, functions related to screen display realized by the display device 10 will be described.
FIG. 5 is a functional block diagram illustrating a functional configuration of the control unit 11 of the display device 10. As illustrated in FIG. 5, the control unit 11 of the display device 10 executes a control program, thereby performing an operation reception unit 111, a first display control unit 112, a second display control unit 113, and a third display control. A function corresponding to the unit 114 is realized.

  The operation reception unit 111 receives an operation performed by the user on the display device 10. For example, the operation reception unit 111 receives an operation (here, a contact operation) that indicates a position on the first display surface 131 based on an operation signal supplied from the contact sensor 121. The operation receiving unit 111 receives an operation (here, a contact operation) that indicates a position on the second display surface 132 based on an operation signal supplied from the contact sensor 122.

The first display control unit 112 controls the display unit 13 to display the first screen using the first display surface 131. The first display control unit 112 performs screen display using the first display surface 131 by writing screen data (for example, bitmap data) representing the first screen into the VRAM of the display unit 13.
The second display control unit 113 controls the display unit 13 to display the second screen using the second display surface 132. The second display control unit 113 performs screen display using the second display surface 132 by writing screen data (for example, bitmap data) representing the second screen into the VRAM of the display unit 13.

The third display control unit 114 performs transparent display of the second screen using the first display surface 131 when the first screen is displayed on the first display surface 131. For example, the third display control unit 114 selectively performs transmissive display according to the non-inverted mode and transmissive display according to the inverted mode. For example, the third display control unit 114 performs a transparency process for increasing the transparency of the second screen, generates image data representing a transparent image, and synthesizes the image data representing the first screen. The third display control unit 114 performs the transparent display of the second screen by writing the combined screen data into the VRAM.
Each of the first display control unit 112, the second display control unit 113, and the third display control unit 114 performs screen display according to the operation received by the operation reception unit 111, for example.
Next, the operation of the display device 10 will be described.

FIG. 6 is a flowchart showing processing when the display device 10 displays a screen. FIG. 7 is a diagram illustrating a screen example displayed on the display device 10.
The control unit 11 of the display device 10 controls the display unit 13 to display the first screen on the first display surface 131 (step S1). At this time, the control unit 11 may display the second screen on the second display surface 132 or may not display the screen.

Next, the control unit 11 determines whether or not to start the transparent display of the second screen on the first display surface 131 (step S2). The start condition of the transmissive display may be determined in advance. This start condition is, for example, a condition that a long press operation on the second display surface 132 has been performed. The long press operation is, for example, an operation of continuously instructing a position on the second display surface 132 for a predetermined time (for example, 3 seconds).
When receiving a long press operation on the second display surface 132, the control unit 11 determines “YES” in the process of step S2, and proceeds to the process of step S3.

  Next, the controller 11 selects either the non-inversion mode or the inversion mode (step S3). The selection conditions for the transmissive display mode may be determined in advance. For example, when the second screen includes a predetermined amount (for example, a predetermined number of characters) or more of characters, the non-inversion mode is selected and the second screen includes characters less than the predetermined amount. The condition is that the inversion mode is selected.

  Here, as shown in FIG. 7A, a first screen R3 (that is, an application use screen) displayed when a predetermined application program is executed is displayed on the first display surface 131, and the application program is displayed. Let us consider a case in which a second screen R4 showing the manual is displayed on the second display surface 132. The second screen R4 is a screen including a plurality of characters and illustrations. In this case, since the second screen R4 includes a predetermined amount or more of characters, the control unit 11 selects the non-inversion mode in the process of step S3 (step S3; non-inversion). Then, the control unit 11 performs transparent display of the second screen according to the non-inversion mode.

  Here, as shown in FIG. 7B, the control unit 11 performs a transparent display of the second screen R4. That is, the control unit 11 displays a transparent image R4t representing the second screen R4 on the first display surface 131 so as to overlap the first screen R3. On the other hand, the control unit 11 continues to display the second screen R4 on the second display surface 132. The user who sees the transparent display on the second screen R4 can refer to the information on the second screen R4 while performing operations related to the application program with reference to the first screen R3.

Returning to FIG. 6, the control unit 11 determines whether or not to end the transparent display of the second screen (step S6). When continuing the transmissive display, the control unit 11 returns to the process of step S3. When the transmissive display is to be ended (step S6; YES), the control unit 11 determines whether to end the screen display on the first display surface 131 (step S7). When the screen display of the first display surface 131 is continued (step S7; NO), the control unit 11 returns to the process of step S2 while displaying the first screen on the first display surface 131. On the other hand, when the control unit 11 makes a transition to another screen or terminates the screen display of the first display surface 131, the control unit 11 determines “YES” in the process of step S7 and terminates the screen display.
When it is determined that the transparent display is not performed in the process of step S2 (step S2; NO), the control unit 11 proceeds to the process of step S7.

  Next, consider the case where the first screen R1 and the second screen R2 described in FIG. 3 are displayed in the process of step S1. In this case, the second screen R2 includes characters less than a predetermined amount. For this reason, the control part 11 selects the inversion mode by the process of step S3 (step S3; inversion). And the control part 11 performs the transparent display of a 2nd screen according to reversal mode (step S5).

  When the screen display described with reference to FIG. 3 is performed, as illustrated in FIG. 4B, the control unit 11 performs a transparent display of the second screen R2. That is, the control unit 11 displays a transparent image R4t obtained by inverting the second screen R2 left and right on the first display surface 131 so as to overlap the first screen R1. On the other hand, the control unit 11 continues to display the second screen R2 on the second display surface 132. The user who sees the transparent display on the second screen R2 can refer to both the information on the first screen R1 and the information on the second screen R2.

Further, the control unit 11 can customize the second screen R2 based on an operation performed on the first display surface 131 during the transparent display of the second screen.
As shown in FIG. 8A, a case is considered in which the user touches the display position of the window Wt included in the transparent image R2t with the finger F and moves the finger F in the arrow A1t direction. In this case, the control unit 11 changes the display position by moving the window W to be displayed on the second display surface 132 in the arrow A1 direction so as to be displayed on the opposite side of the window Wt. When the window Wt is moved in the upper right direction on the first display surface 131, the control unit 11 moves the window W in the upper left direction on the second display surface 132, as shown in FIG. 8B.
Since the user can obtain a feeling that the second screen R2 can be seen through the display device 10, the user can perform an operation for customizing the second screen R2 by an intuitive operation.

The control unit 11 may execute another process performed with reference to the second screen during the transparent display of the second screen. For example, the control unit 11 deletes an object (for example, an icon) arranged on the second screen, or performs settings related to a function executed when the object is operated (for example, display and operation of a property screen). Or you may.
Note that the control unit 11 proceeds to the process of step S6 after performing the transparent display in the process of step S5. Since the subsequent operations have already been described, description thereof is omitted here.

The display device 10 described above displays information on each screen of the first screen and the second screen on the first display surface 131 by transparently displaying the second screen on the first display surface 131 that displays the first screen. Display above. Therefore, when the user refers to the information on each screen of the first screen and the second screen, the user changes the posture of the display device 10 (more specifically, the first display surface 131 and the second display surface 132). It is not necessary to reverse the direction of Further, according to the display device 10, in the screen display when there are a plurality of display surfaces, it is possible to give the user visual interest and operational interest.
Further, the display device 10 selectively performs transmissive display in the non-inverted mode and transmissive display in the inverted mode. Thereby, when the transmissive display is performed in the non-inversion mode, for example, the user can easily understand the information on the second screen. When transmissive display is performed in the reverse mode, the user can perform an intuitive operation on the second display surface 132.

[Modification]
The present invention can be implemented in a form different from the above-described embodiment. The present invention can also be implemented in the following forms, for example. Further, the following modifications may be combined as appropriate.
(Modification 1)
In the above-described embodiment, when the display device 10 selects the inversion mode and transparently displays the second screen, the display device 10 performs processing performed with reference to the second screen based on an operation on the first display surface 131. An example was explained. Without being limited to this example, the display device 10 may perform the same processing when the non-inversion mode is selected. In addition, when the second screen other than the operation screen on which the icon is arranged is transparently displayed, the display device 10 may execute processing performed with reference to the second screen based on an operation on the first display surface 131. Good.

(Modification 2)
The display device 10 may change the display position of the second screen when the second screen is being transmissively displayed on the first display surface 131. FIG. 9 is a flowchart illustrating processing performed by the display device 10 regarding the change of the display position of the second screen. The display device 10 performs the process shown in FIG. 9 in parallel with the process described with reference to FIG. FIG. 10 is a diagram illustrating an example of a screen related to changing the display position of the second screen in the display device 10. FIG. 10 shows a screen example corresponding to the transparent display described in FIG.

  First, the control unit 11 determines whether an operation for changing the display position of the transparently displayed second screen has been received (step S11). The control unit 11 receives an operation of designating the display position by an operation of instructing the display position of the transmission image on the first display surface 131. When the control unit 11 receives an operation for changing the display position of the user (step S11; YES), the control unit 11 changes the position of the transmissive display (that is, the position of the transmissive image) (step S12).

For example, the user performs an operation of moving the transparent image to a predetermined position on the first display surface 131 by touching the display position of the transparent image with a finger. When receiving an operation for changing the display position, the control unit 11 repeatedly performs the process of step S11; YES → step S12 → step S11; YES. When the operation for designating the display position is not accepted, the control unit 11 determines “NO” in the process of step S11 and stands by.
FIG. 10A illustrates a case where the user touches the display position of the transparent image R4t with the finger F and moves it in the downward arrow A2 direction. In this case, as illustrated in FIG. 10B, the control unit 11 moves the display position of the transmission image R4t downward. By changing the display position, it becomes easy for the user to refer to the information of the area that overlaps the transparent image on the first screen.

(Modification 3)
The display device 10 may include a configuration for changing the transparency (transmittance) of the second screen that is transparently displayed. FIG. 11 is a flowchart illustrating processing performed by the display device 10 regarding the change in the transparency. FIG. 12 is a diagram illustrating an example of a screen related to the change of the transparency in the display device 10.
First, the control unit 11 of the display device 10 determines whether or not a contact operation on the second display surface 132 is accepted (step S21). As illustrated in FIG. 12A, when a contact operation in which the finger F touches the second display surface 132 is performed, the control unit 11 determines “YES” in the process of step S <b> 21. Then, after starting the transparent display of the second screen on the first display surface 131, the control unit 11 lowers the transparency of the second screen that is transparently displayed (step S22). For example, the control unit 11 decreases the transmittance by a unit amount in accordance with the contact operation for unit time. Accordingly, as illustrated in FIG. 12B, the control unit 11 performs the transparent display of the second screen on the first display surface 131.

  Next, the control unit 11 determines whether or not the transparency has reached a threshold value (step S23). The threshold value is a predetermined transparency, and is 0% or a predetermined value larger than 0%, for example. For example, the threshold is set to a transparency that allows the user to observe the second screen more easily than the first screen. When determining “NO” in the process of step S23, the control unit 11 returns to the process of step S21. And the control part 11 is step S21; YES-> step S22-> step S23; NO, when the contact operation with respect to the 2nd display surface 132 is received when the 1st screen is displayed on the 1st display surface 131. → Step S21; YES →... Is repeated and executed to lower the transparency of the second screen stepwise (continuously).

When the control unit 11 determines that the transparency has reached the threshold value (step S23; YES), the control unit 11 ends the transmissive display and displays the second screen on the first display surface 131 instead of the first screen ( Step S24). In other words, as illustrated in FIG. 12C, the control unit 11 switches from the state where the first screen is active on the first display surface 131 to the state where the second screen is active. For the user, since the second screen is activated on the first display surface 131 by performing an operation to push the second screen forward, the screen can be switched by an intuitive operation.
In addition, about the 2nd display surface 132, the control part 11 complete | finishes the display of a 2nd screen. Furthermore, the control unit 11 may display the first screen displayed on the first display surface 131 until the last time on the second display surface 132 instead of the second screen.
In this modification, the control unit 11 may increase the transparency stepwise in accordance with the operation performed by the user. Further, the control unit 11 may omit the process of step S <b> 24 so that the screen to be activated on the first display surface 131 is not switched.

(Modification 4)
As shown in FIG. 13A, when the display device 10 displays a second screen (the range is indicated by a two-dot chain line) having a size larger than that of the second display surface 132 on the second display surface 132. Only a part of the area is displayed on the second display surface 132. In this case, in order to display a non-display area on two of the second screens, the user performs an operation of moving the non-display area to the second display surface 132.
In the transmissive display in this case, as shown in FIG. 13B, the control unit 11 displays the non-display area on the second display surface 132 in the second screen by the transmissive display on the first display surface 131. May be. Here, the control unit 11 transparently displays the entire second screen using the first display surface 131. Since the first display surface 131 is larger than the second display surface 132, the user can refer to a wider range than the second display surface 132 in the second screen.

(Modification 5)
The selection condition of the transparent display mode is not limited to the example using the amount of characters as a condition. For example, it may be determined by the application program provider or user for each application program or for each category to which the application program belongs. Further, the control unit 11 may analyze the second screen and select a transmissive display mode.
The display device 10 may perform only one of the transmissive display in the non-inverted mode and the transmissive display in the inverted mode.
Further, the second screen on which the display device 10 performs transparent display is not limited to a display screen when various operation screens or application programs are executed, and may be any display screen.

(Modification 6)
The transmissive display performed by the display device 10 may be performed by a method in which the transmissive image is arranged in a layer on the back side as viewed from the user than the first screen. In this case, the control unit 11 may increase the transparency of the first screen by the transmission process.

(Modification 7)
The display device 10 has received a long press operation on the second display surface 132 and started transparent display, but the start condition is not limited to this example. For example, the display device 10 may accept other operations such as an operation of drawing a figure such as a circle or an operation of flipping the display surface on the second display surface 132, and may start transparent display. Further, the display device 10 may start the transparent display using a physical key provided on the display device 10. In addition, these operation methods may be applied to the operation which changes the transparency demonstrated in the modification 2 mentioned above.
Further, the display device 10 detects a proximity operation performed in a non-contact manner with respect to the first display surface 131 and the second display surface 132 using a proximity sensor instead of or in combination with the contact operation. May be. The operation for selecting an icon may be performed using a physical key provided on the display device 10, and the specific operation method is not particularly limited.

(Modification 8)
In the display device 10, the relationship between the shape and size of the first display surface 131 and the second display surface 132 is not particularly limited. For example, the first display surface 131 and the second display surface 132 may have the same shape and the same size. Moreover, the display apparatus 10 may not be a display apparatus which has a display surface in the front and back. For example, the display device 10 may be a display device in which two display surfaces are provided on the same surface such as the front. In addition, the display device 10 may include display surfaces on the front surface and the side surface as display surfaces facing in different directions.
When the vertical direction of the first display surface 131 and the second display surface 132 is opposite, the control unit 11 performs the transmissive display by further inverting the second screen R2 in the vertical direction in the reverse mode. It is desirable. That is, depending on the positional relationship between the first display surface 131 and the second display surface 132, the reverse direction when the reverse mode is selected may be different, or the control unit 11 may select the non-reverse mode. . Further, the control unit 11 may perform display (for example, display of a message or an icon) that clearly indicates to the user the selected mode or the reverse direction when the reverse mode is selected.
The display device 10 may not be a display device that employs a touch panel. In this case, the display device 10 accepts an operation performed by the user using an operation unit such as a physical key. In this case, when the control unit 11 accepts an operation for designating a position on the second display surface 132 in a state where the second screen is transparently displayed, the control unit 11 clearly indicates the position designated by the operation to the user. Display to be performed (for example, cursor display) may be performed using the first display surface 131.

The display device 10 may be a display device other than a smartphone. For example, a display that provides a GUI such as a tablet computer, a feature phone, a personal computer, a PDA (Personal Digital Assistant), a portable game machine, or a portable music player. Any device may be used.
The display device of the present invention only needs to have at least a function of controlling display of objects. For example, a function (for example, execution of an application program) executed when an object is selected may be controlled by a device (processing device) provided separately from the display device.
In each embodiment described above, each function realized by the control unit 11 of the display device 10 can be realized by a combination of a plurality of programs, or can be realized by linkage of a plurality of hardware resources. When the function of the control unit 11 is realized using a program, the program includes a magnetic recording medium (magnetic tape, magnetic disk (HDD (Hard Disk Drive), FD (Flexible Disk)), etc.), optical recording medium (optical disk). Etc.), may be provided in a state of being stored in a computer-readable recording medium such as a magneto-optical recording medium or a semiconductor memory, or may be distributed via a network. The present invention can also be grasped as a display method.

DESCRIPTION OF SYMBOLS 10 ... Display apparatus, 11 ... Control part, 111 ... Operation reception part, 112 ... 1st display control part, 113 ... 2nd display control part, 114 ... 3rd display control part, 12 ... Sensor part, 121, 122 ... Contact Sensor, 13 ... display unit, 131 ... first display surface, 132 ... second display surface, 14 ... communication unit, 15 ... storage unit.

Claims (10)

A display unit including a first display surface and a second display surface;
A first display control unit for displaying a first screen using the first display surface;
A second display control unit for displaying a second screen using the second display surface;
A display device comprising: a third display control unit that performs transparent display of the second screen using the first display surface when the first screen is displayed. The third display controller is
The display device according to claim 1, wherein the transmissive display is performed on the second screen reversed in a predetermined direction. The third display controller is
The display device according to claim 1, wherein the transmissive display is performed on the second screen displayed on the second display surface. The third display controller is
The transmissive display on the second screen reversed in a predetermined direction and the transmissive display on the second screen displayed on the second display surface are selectively performed. The display device according to claim 3. The third display controller is
The display device according to any one of claims 1 to 4, wherein the transparency of the second screen on which the transparent display is performed is changed in a stepwise manner in accordance with an operation performed by a user. The first display surface is larger than the second display surface;
The third display controller is
6. The display device according to claim 1, wherein the transmissive display is performed on a region of the second screen that is not displayed on the second display surface. The first display surface is larger than the second display surface;
The third display controller is
The display device according to any one of claims 1 to 6, wherein a display position of the second screen on which the transparent display is performed is changed according to an operation performed by a user. The display device according to claim 1, wherein the first display surface and the second display surface are opposite to each other. A display method for displaying an image on a display unit including a first display surface and a second display surface,
Displaying a first screen using the first display surface;
Displaying a second screen using the second display surface;
Performing a transparent display of the second screen using the first display surface when the first screen is displayed. A computer for controlling a display unit including a first display surface and a second display surface;
Displaying a first screen using the first display surface;
Displaying a second screen using the second display surface;
Performing the transparent display of the second screen using the first display surface when the first screen is displayed.

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