JP2010156781A - Image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display device which has excellent portability, which is easily operatable, and which eliminates inconvenience of conventional paper-based systems. <P>SOLUTION: The image display device 10 which includes: a first display part 11a to display an image; a second display part 11b which is located on the rear side of the first display part 11a and displays the image; and a control part (12) to control the whole operation of the device, includes a rotation detection part 17 to detect the rotating operation of the image display device 10. The control part (12), based on the detection result of the rotation detection part 17, determines the rotating direction so that a vertical direction of an image to be displayed in the second display part 11b may be correctly displayed and displays the image in the second display part 11b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image display apparatus that replaces printed matter such as paper, and more particularly to an image display apparatus that can display images on both sides in the same manner as paper.

In recent years, development of an image display apparatus having a memory image display function, so-called electronic paper, has been advanced. Since electronic paper can hold an image display even when the power is turned off, the amount of paper used can be greatly reduced by using the electronic paper instead of the normal printed matter. Further, since electronic paper requires power only when rewriting images, it can be expected to reduce power consumption as compared with other electronic display media such as personal computers and mobile phone terminals.
In the above-described electronic paper, in order to switch the display such as turning pages, an instruction to that effect must be input by some method. Conventional electronic paper requires key input and is complicated to operate.
In this respect, in Patent Document 1, the tilt of the display device is detected by a sensor, the tilt direction in which the detected tilt is a certain level or more is detected, and the display content of the display device can be changed according to the tilt direction. Display devices have been proposed. Patent Document 2 proposes a display device (electronic book) that is composed of a plurality of electronic paper sheets each having a display surface on both sides, and that can switch images by cyclic turning of the electronic paper sheets. . Both are easier to operate than keystrokes.
JP 2005-165760 A JP 2007-333973 A

However, Patent Document 1 requires an operation of tilting the display device, and there is a problem that the user must newly learn an image switching operation. Conventionally, those who have become accustomed to handling paper cannot easily operate the display device in that an operation different from that of paper is required. A display device that can easily browse images with the same operation feeling as paper is desired.
In this regard, in the display device of Patent Document 2, the display contents can be switched by turning the electronic paper sheet in the same manner as a paper book. However, the display device must have a plurality of electronic paper sheets, and it is difficult to say that the display device is excellent in portability.
Furthermore, both Patent Documents 1 and 2 do not take into account the display direction when the display device is rotated, and thus do not solve the inconvenience of conventional paper.
The present invention has been made in view of the above points, and an object of the present invention is to provide an image display device that is excellent in portability, can be easily operated, and solves the inconvenience of conventional paper.

In order to solve the above-described problem, the invention according to claim 1 is a first display unit that displays an image, a second display unit that is located on a back surface of the first display unit and displays an image, and an apparatus An image display device comprising: a control unit that controls the overall operation; and a rotation detection unit that detects a rotation operation of the image display device, wherein the control unit is based on a detection result of the rotation detection unit. Then, a rotation direction that correctly displays the vertical direction of the image to be displayed on the second display unit is determined, and the image is displayed on the second display unit.
According to a second aspect of the present invention, in the image display device according to the first aspect, the control unit is configured to apply the second display unit to the second display unit based on a detection result of the rotation direction of the image display device by the rotation detection unit. A page to be displayed is determined, and the page is displayed on the second display unit.

According to a third aspect of the present invention, in the image display device according to the second aspect, the rotation detection unit includes means for detecting a rotation speed of the image display device, and the control unit detects the rotation detected by the rotation detection unit. According to the speed, a page moved by a predetermined number of pages from the image displayed on the first display unit is determined as a page to be displayed on the second display unit, and the page is displayed on the second display unit. It is characterized by displaying.
According to a fourth aspect of the present invention, in the image display device of the third aspect, the predetermined number of pages can be arbitrarily set.
According to a fifth aspect of the present invention, in the image display device according to any one of the first to fourth aspects, the first display unit and the second display unit can hold an image display even when the power is turned off. It is a memory image display medium.

  According to the image display device of the present invention, since the display surfaces are provided on both sides, the image on the back side can be viewed by the operation of turning the display device over like a paper document printed on both sides. In the case of paper, depending on the printing direction of the back side document and the direction of turning it over, the orientation of the document is difficult for the user to see. However, the display device of the present invention can detect the reverse direction and automatically display the image in the optimal display direction for the user, so the user can turn over the reverse image without worrying about the display direction of the reverse image. You can browse.

[First embodiment]
A first embodiment of the present invention will be described with reference to FIGS. The present embodiment is characterized in that even if the image display device is turned over, the orientation (vertical relationship) of the display image does not change when viewed from the user. FIG. 1 is a schematic block diagram illustrating a hardware configuration of the image display apparatus according to the first embodiment. FIG. 2 is a flowchart showing the operation of the image display apparatus. 3 and 4 are schematic diagrams showing the relationship between the rotation direction of the image display device and the display state of the image.
The image display device 10 according to the present embodiment includes the display units 11 on both sides, and the image displayed on the display unit 11 located on the back surface can be viewed by turning the image display device 10 upside down.
As shown in the block diagram of FIG. 1, the image display device 10 includes a first display unit 11 a that displays an image, a second display unit 11 b that is located on the back surface of the first display unit 11 a and displays an image, and an image display. A CPU 12 (control unit) for controlling the operation of the entire apparatus 10, a first display control unit 13a that performs display control of the first display unit 11a, and a second display control unit that performs display control of the second display unit 11b. 13b, an image storage unit 14 that stores image information to be displayed on the display unit 11, a ROM 15 that stores a control program for the image display device 10, a RAM 16 that is an execution memory for the control program, and an image display device 10 A rotation detection unit 17 that detects a rotation operation, an operation unit 18 that receives an input from a user, and a power source 19 that supplies power to the image display device 10 are provided.
In the present embodiment, the display medium constituting the display unit 11 will be described as an example of a storage-type display medium having a storage property that can hold an image display even when the power is turned off. It is also possible to use liquid crystal or the like.

Further, the CPU 12 may be configured to include a first display control unit 13a and a second display control unit 13b.
Further, instead of the image storage unit 14, an image information receiving unit may be provided as an interface capable of transferring image information from the outside of the image display device 10. Further, the image display apparatus 10 may not be provided with the power supply 19 but may be supplied with power from outside the apparatus through an interface for power supply.
For example, an acceleration sensor is used for the rotation detection unit 17. Any sensor can be used as long as it can detect the rotational direction as described below, and the sensors can be used in appropriate combination.

The operation of the image display device 10 will be described with reference to FIG.
(Step S <b> 1) First, the user designates on which display unit 11 of the image display device 10 an image is to be displayed, from the operation unit 18. At this time, an image to be displayed may be designated. The CPU 12 controls the display control unit 13 corresponding to the designated display unit 11, and the display control unit 13 reads out image information from the image storage unit 14 and causes the display unit 11 to display an image. Further, the CPU 12 starts control of the rotation detection unit 17, and the detection operation of the rotation operation of the image display device 10 main body is started.
The image display device 10 displays an image in a predetermined vertical direction in the initial state. The user can also arbitrarily specify the vertical direction of the display unit 11 from the operation unit 18.
(Step S2) If the rotation detection unit 17 detects the rotation operation of the display unit 11, the process proceeds to step S3, and if not, the process proceeds to step S6.
(Step S3) It is determined whether the rotation direction of the display unit 11 detected by the rotation detection unit 17 is the horizontal direction or the vertical direction. If the direction is horizontal, the process proceeds to step S4. If the direction is vertical, the process proceeds to step S5.
Here, the horizontal direction refers to a rotation direction that rotates around the vertical axis on the screen of the display unit 11 when viewed from the user (see FIG. 4). In other words, from the user's point of view, the rotation is such that the left and right vertical sides of the screen are switched by rotation and the upper and lower sides are not switched. The vertical direction refers to a rotation direction that rotates around the horizontal axis on the screen of the display unit 11 when viewed from the user (see FIG. 3). In other words, from the user's point of view, the rotation is such that the upper and lower sides of the screen are interchanged by rotation and the left and right vertical sides are not interchanged.

(Step S4) (Step S5) The CPU 12 determines the rotation direction of the image so that the next image to be displayed is in a display direction that is easy for the user to view, sets it in the corresponding display control unit 13, and proceeds to step S6. Here, the display direction that is easy for the user to see is the direction in which the vertical direction of the displayed image is correctly displayed when viewed from the user.
In this step, in addition to the setting for rotating the image displayed on the display unit 11 on the back side before the image display device 10 to be in an easily viewable display direction, the display on the back side before the rotation of the image display device 10 is performed. This also includes a setting for rotating the next image to be displayed in an easy-to-view display direction when no image is displayed on the unit 11.
(Step S6) Based on the instruction from the CPU 12, the display control unit 13 reads the image information to be displayed next from the image storage unit 14, and the display is turned to the surface by the rotation in the display direction set in Steps S4 and S5. An image is displayed on the unit 11. When it is determined that there is no need to change the image to be displayed and its direction, there is no need to display it again.
After the image display process in step S6 is completed, a rotation operation detection standby state is set.

The operation of the image display apparatus according to this embodiment will be described with reference to FIGS.
FIG. 3 is a diagram illustrating an operation when the image display apparatus is vertically rotated, (a) is a diagram illustrating a state before the rotation, and (b) is a diagram illustrating a state after the rotation. As shown to (a), the image is displayed on the 1st display part 11a in the direction which is easy for a user to see. Further, an image is displayed on the second display portion 11b so that the side on which the operation portion 18 is located is on the lower side. In order to view the image of the second display unit 11b on the back side from this state, if the image display device 10 main body is rotated vertically and turned upside down, the vertical relationship of the image displayed on the second display unit 11b is displayed correctly. Will not be. In the present embodiment, as shown in (b), the image on the second display unit 11b on the side viewed by the user is rotated so that the user can easily see the image. At this time, the display direction of the image of the first display unit 11a that is not used for browsing on the back side is not changed before and after the rotation.
FIG. 4 is a diagram showing an operation when the image display device is rotated horizontally, (a) is a diagram showing a state before the rotation, and (b) is a diagram showing a state after the rotation. . As shown to (a), the image is displayed on the 1st display part 11a in the direction which is easy for a user to see. Further, an image is displayed on the second display portion 11b so that the side on which the operation portion 18 is located is on the lower side. In order to view the image of the second display unit 11b on the back side from this state, even if the main body of the image display device 10 is turned sideways and turned upside down, the vertical relationship of the image displayed on the second display unit 11b is correctly displayed. Therefore, the display is continued as it is without rotating the image.

  As described above, according to the present embodiment, since the image display device 10 includes the display units 11 on both the front and back surfaces, the operation of turning the image display device 10 upside down like a paper document printed on both sides can be performed on the back surface. The image displayed on the display unit 11 can be browsed. Further, in the case of paper, depending on the printing direction of the back side document and the direction of turning it over, the orientation of the document is difficult to see for the user. However, in the image display device 10 according to the present embodiment, the rotation detection unit 17 detects the turning direction. Since the image can be automatically displayed in the optimal display direction for the user, the user can turn over and view the image on the back without worrying about the display direction of the image on the back.

[Second Embodiment]
A second embodiment of the present invention will be described with reference to FIG. The present embodiment is characterized in that the page to be displayed is determined based on the detection result of the rotation direction of the image display device. FIG. 5 is a flowchart showing the operation of the image display apparatus. In addition, about the part which performs the same operation | movement as 1st embodiment, the same step number is attached | subjected and the description is abbreviate | omitted.
Steps S1 to S3 are the same as in the first embodiment. In step S3, it is determined whether the rotation direction of the display unit 11 detected by the rotation detection unit 17 is the vertical direction or the horizontal direction. If the horizontal direction, the process proceeds to step S11. If the vertical direction, the process proceeds to step S14.

(Step S11) If the rotation direction is right rotation, the process proceeds to step S12. If the rotation direction is left rotation, the process proceeds to step S13. Here, the right rotation means that the vertical side of the image display device 10 is rotated around the vertical axis on the screen of the display unit 11 when viewed from the user, and the image display device 10 on the left before the rotation is displayed as shown in FIG. It is the rotation direction that passes through the front side of the device 10 and becomes the right vertical side. The left rotation is a rotation about the vertical axis on the screen of the display unit 11 as viewed from the user, and the vertical side of the image display device 10 that is on the right before the rotation passes through the front side of the image display device 10. It is the rotation direction that becomes the left vertical side.
(Step S12) The CPU 12 stores the image information of the previous page of the page displayed on the display unit 11 that is currently on the front side with respect to the display control unit 13 that controls the display unit 11 that is currently on the back side. After setting to access the current memory area, the process proceeds to step S4.
(Step S13) The CPU 12 stores the image information of the next page of the page displayed on the display unit 11 that is currently on the front side with respect to the display control unit 13 that controls the display unit 11 that is currently on the back side. After setting to access the current memory area, the process proceeds to step S4. The user arbitrarily sets the relationship between the rotation direction of the image display device 10 and the page feed direction, such as accessing the memory area of the next page when rotating to the right and accessing the memory area of the previous page when rotating to the left. You may be able to do it.

(Step S14) If the rotation direction is a downward rotation, the process proceeds to Step S15. If the rotation direction is an upward rotation, the process proceeds to Step S16. Here, as shown in FIG. 3, the upper rotation means that the side of the image display device 10 that is rotated around the horizontal axis on the screen of the display unit 11 when viewed from the user and is lower before the rotation is the image display device. It is the direction of rotation that passes through 10 front sides and becomes the upper side. Further, the downward rotation refers to rotation around the horizontal axis on the screen of the display unit 11 when viewed from the user, and the side of the image display device 10 that was on before the rotation passes through the front side of the image display device 10 and moves downward. It is the direction of rotation that becomes the side of the side.
(Step S15) The CPU 12 stores the image information of the previous page of the page displayed on the display unit 11 on the front side, with respect to the display control unit 13 that controls the display unit 11 on the back side. After setting to access the current memory area, the process proceeds to step S5.
(Step S16) The CPU 12 stores the image information of the next page of the page displayed on the display unit 11 which is currently on the front side with respect to the display control unit 13 which controls the display unit 11 which is currently on the back side. After setting to access the current memory area, the process proceeds to step S5.
(Step S6) Based on an instruction from the CPU 12, the display control unit 13 reads the image data from the memory area set in Step S12, S13, S15, or S16, and rotates in the display direction set in Step S4 or S5. As a result, an image is displayed on the display unit 11 on the surface.

As described above, according to the present embodiment, when switching pages, it is not necessary to perform a complicated procedure such as key operation, and the operation of turning one page forward / back one page is performed by turning the image display device over. Can be realized. Since this operation is the same operation as that of a paper book, it is possible to provide the user with an operation feeling close to that of a conventional paper medium.
In addition, even when a display unit that takes time to rewrite, such as electrophoresis electronic paper, is adopted, rewriting is completed during the time when the user turns over, so the user can wait for the rewriting wait time. You don't have to be conscious.

[Third embodiment]
A third embodiment of the present invention will be described with reference to FIG. The present embodiment is characterized in that the rotation detection unit detects the rotation speed of the image display device and determines the next page to be displayed according to the speed. FIG. 6 is a flowchart showing the operation of the image display apparatus. In addition, about the part which performs the same operation | movement as 1st, 2nd embodiment, the same step number is attached | subjected and the description is abbreviate | omitted.
Hereinafter, an example of the image display device 10 in which a plurality of images including a plurality of chapters are stored in the image storage unit 14 will be described.

(Step S11) If the rotation direction is right rotation, the process proceeds to step S21. If the rotation direction is left rotation, the process proceeds to step S24.
(Step S21) If the rotation speed detected by the rotation detector 17 is equal to or greater than a certain amount, the process proceeds to Step S22, and if it is equal to or less than the certain amount, the process proceeds to Step S23.
(Step S <b> 22) The CPU 12 stores image information for a specified page before the page displayed on the display unit 11 on the front side in the display control unit 13 that controls the display unit 11 on the back side. After setting to access the memory area that has been set, the process proceeds to step S4. For example, as shown in the flowchart of FIG. 6, the first page of the previous chapter is set to be read.
(Step S23) The CPU 12 stores the image information of the previous page of the page displayed on the display unit 11 on the front side, with respect to the display control unit 13 that controls the display unit 11 on the back side. After setting to access the memory area, the process proceeds to step S4.
(Step S24) If the rotation speed detected by the rotation detector is not less than a certain amount, the process proceeds to Step S25, and if it is less than the certain amount, the process proceeds to Step S26.
(Step S <b> 25) The CPU 12 displays the image information after the designated page from the page displayed on the display unit 11 on the front surface, with respect to the display control unit 13 that controls the display unit 11 on the back surface. After setting to access the stored memory area, the process proceeds to step S4. For example, as shown in the flowchart of FIG. 6, the first page of the next chapter is set to be read.
(Step S26) The CPU 12 stores the image information of the next page of the page displayed on the display unit 11 that is currently on the front side with respect to the display control unit 13 that controls the display unit 11 that is currently on the back side. After setting to access the memory area, the process proceeds to step S4.

(Step S14) If the rotation direction is a downward rotation, the process proceeds to Step S27. If the rotation direction is an upward rotation, the process proceeds to Step S30.
(Steps S27 to S32) Steps S27 to S32 are the same as steps S21 to S26, respectively, and thus the description thereof is omitted.
(Step S6) Based on the instruction from the CPU, the display control unit reads the image data from the memory area set in Steps S22, S23, S25, S26, S28, S29, S31, and S32, and sets it in Step S4 or Step S5. In the displayed direction, an image is displayed on the display unit 11 that has become a surface by rotation.
In the present embodiment, the example in which the first page of the previous chapter or the next chapter is read when the rotation speed detected by the rotation detection unit is equal to or greater than a certain amount has been described. This page feed amount can be set by shifting to a predetermined setting mode of the image display device 10 by operating the operation unit 18. In this setting mode, the user can arbitrarily set the rotational speed of the image display device 10 and the number of pages to be switched when the rotational speed is equal to or greater than a certain amount, that is, the number of jump pages.

  As described above, according to the present invention, when browsing information composed of a large number of images, a transition can be made by a specified number of pages according to the speed at which the image display device body is turned over, Compared with turning over the main body every time one page is switched to view the page, the burden on the user can be reduced. In addition, since the number of pages to which the user can change can be set, an environment suitable for each user can be provided.

It is a schematic block diagram which shows the hardware constitutions of the image display apparatus which concerns on 1st embodiment. 3 is a flowchart illustrating an operation of the image display apparatus according to the first embodiment. It is a figure which shows the operation | movement at the time of rotating an image display apparatus vertically, (a) is a figure which shows the state before rotation, (b) is a figure which shows the state after rotation. It is a figure which shows the operation | movement at the time of rotating an image display apparatus horizontally, (a) is a figure which shows the state before rotation, (b) is a figure which shows the state after rotation. 6 is a flowchart illustrating an operation of the image display apparatus according to the second embodiment. 10 is a flowchart illustrating an operation of the image display apparatus according to the third embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Image display apparatus, 11 ... Display part, 11a ... First display part, 11b ... Second display part, 12 ... CPU, 13 ... Display control part, 13a ... First display control part, 13b ... Second display control part , 14 ... Image storage unit, 15 ... ROM, 16 ... RAM, 17 ... Rotation detection unit, 18 ... Operation unit, 19 ... Power source

Claims (5)

An image display device comprising: a first display unit for displaying an image; a second display unit for displaying an image located on the back surface of the first display unit; and a control unit for controlling the operation of the entire device. And
A rotation detection unit for detecting a rotation operation of the image display device;
The control unit determines a rotation direction that correctly displays a vertical direction of an image to be displayed on the second display unit based on a detection result of the rotation detection unit, and displays the image on the second display unit. An image display device characterized by being displayed on the screen.   The image display device according to claim 1, wherein the control unit determines a page to be displayed next on the second display unit based on a detection result of a rotation direction of the image display device by the rotation detection unit, An image display device displaying the page on the second display unit.   3. The image display device according to claim 2, wherein the rotation detection unit includes means for detecting a rotation speed of the image display device, and the control unit performs the first display according to the rotation speed detected by the rotation detection unit. An image characterized in that a page shifted by a predetermined number of pages from the image displayed on the part is determined as a page to be displayed next on the second display part, and the page is displayed on the second display part. Display device.   4. The image display device according to claim 3, wherein the predetermined number of pages can be arbitrarily set.   5. The image display device according to claim 1, wherein the first display unit and the second display unit are storage-type image display media capable of holding an image display even when the power is turned off. A characteristic image display device.

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