JP2012221228A - Display device, display method, computer program, and recording medium - Google Patents

Abstract

In a display device having a translucent display screen and displaying an object to be viewed by a viewer on the front side of the display screen, the back side seen through the display screen is the same as the color of the object Provided are a display device, a display method, a computer program, and a recording medium on which the computer program is recorded, in which the object can be clearly seen even when the color or similar color is used.
The back side of the display screen of the display unit is imaged, the color of the imaged image and the color of the object are compared, a predetermined color is determined based on the comparison result, and the determination result Based on, the object color is changed and displayed.
[Selection] Figure 3

Description

  The present invention relates to a display device that displays an object to be viewed by a viewer on the front side of a translucent display screen, a display method, a computer program, and a recording medium on which the computer program is recorded.

  In recent years, so-called transmissive liquid crystal panels, organic EL panels, and the like that can visually recognize the other side are increasing.

  For example, in Patent Document 1 and Patent Document 2, a touch panel to which a key array is assigned is arranged on the back surface of a display means that is partially transmissive, and the key array of peripheral keys including the touch position of the touch panel is arranged on the front surface. An information display input device that is visible through a display unit is disclosed.

JP 2006-216087 A JP 2007-164767 A

  On the other hand, in the transmissive liquid crystal panel and the organic EL panel as described above, since the other side (back side) can be visually recognized, in other words, the back side is visually recognized together with the displayed object. There is a problem that it is difficult to visually recognize the object.

  That is, when the back side visually recognized through the transmissive liquid crystal panel and the organic EL panel is the same color or similar color as the color of the object to be displayed, the object color becomes a protective color and is difficult to visually recognize. However, the information display input device according to Patent Document 1 and Patent Document 2 cannot solve such a problem.

  The present invention has been made in view of such circumstances, and an object of the present invention is to display an object to be viewed by a viewer on the front side of a translucent display screen. By comparing the color of the captured video and the color of the object, determining a predetermined color based on the comparison result, and changing and displaying the color of the object based on the determination result A display device, a display method, a computer program, and the computer program capable of clearly viewing the object even when the back side seen through the display screen is the same color or a similar color of the object Is to provide a recording medium on which is recorded.

  The display device according to the present invention comprises a display screen having translucency, and in the display device for displaying an object to be viewed by a viewer on the front side of the display screen, an imaging means for imaging the back side of the display screen; Comparing means for comparing the color of the captured image and the color of the object, a determining means for determining a predetermined color based on the comparison result of the comparing means, and based on the determination result of the determining means, And changing means for changing and displaying the color.

  In the present invention, the imaging unit images the back side of the display screen, and the comparison unit compares the color of the captured image and the color of the object. The determination means determines a predetermined color based on the comparison result of the comparison means, and the change means changes and displays the color of the object based on the determination result.

  The display device according to the present invention includes a selection receiving unit that receives a color selection, and the comparison unit is configured to compare the color related to the selection received by the selection receiving unit with the color of the object. It is characterized by being.

  In the present invention, when the selection receiving unit receives a color selection, the comparison unit compares the color related to the selection received by the selection receiving unit with the color of the object, and the determination unit Determines a predetermined color based on the comparison result of the comparison means.

  The display device according to the present invention includes a time measuring means, and is configured such that the comparison by the comparing means or the determination by the determining means is performed based on the time measurement result of the time measuring means.

  In the present invention, based on the time measurement result of the time measuring means, for example, at every elapse of a predetermined time, the comparing means compares the color of the captured video and the color of the object, and the determining means is predetermined. Determine the color.

  The display device according to the present invention is characterized in that the changing means is configured to change the color of the object over time.

  In the present invention, when the changing means changes and displays the color of the object based on the determination result by the determining means, the color of the object is gradually changed over time.

  The display device according to the present invention is characterized in that the imaging direction by the imaging means is variable.

  In the present invention, since the imaging direction by the imaging means is variable, the user can adjust the imaging direction as necessary.

  The display method according to the present invention displays an object on a display device including a translucent display screen that displays an object to be viewed by a viewer on the front side, and an imaging unit that images the back side of the display screen. In the display method, a comparison step for comparing the color of the captured image and the color of the object, a determination step for determining a predetermined color based on the comparison result in the comparison step, and a determination result in the determination step And a changing step of changing and displaying the color of the object.

  A computer program according to the present invention provides a computer that constitutes a display device that includes a translucent display screen that displays an object to be viewed by a viewer on the front side, and an imaging unit that images the back side of the display screen. In the computer program for displaying the image, a comparison step in which the computer compares the color of the captured video and the color of the object, and a determination step in which the computer determines a predetermined color based on the comparison result in the comparison step And a changing step of causing the computer to change and display the color of the object based on the determination result in the determining step.

  In the present invention, the back side of the display screen is imaged, and the color of the captured video on the back side is compared with the color of the object. A predetermined color is determined based on the comparison result, and the color of the object is changed and displayed based on the determination result.

  A recording medium according to the present invention records the computer program of the above-described invention.

  In the present invention, the aforementioned computer program is recorded on the recording medium. The computer reads the computer program from the recording medium, and the above-described display device and display method are realized by the computer.

  According to the present invention, even if the back side seen through the display screen is the same color or similar color as the color of the object object to be viewed by the viewer on the front side of the display screen, Can clearly see the object.

It is a functional block diagram which shows the principal part structure of the book data display apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing explaining the structure of the camera in the book data display apparatus which concerns on Embodiment 1 of this invention. It is a functional block diagram which shows the principal part structure of a control part in the book data display apparatus which concerns on Embodiment 1 of this invention. It is an illustration figure which shows one usage example of the book data display apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the display of the object in the book data display apparatus in the usage example shown in FIG. It is a flowchart explaining the process of the book data display apparatus which concerns on Embodiment 1 of this invention in the usage example shown in FIG. It is an illustration figure which shows the change display of a color in the book data display apparatus which concerns on Embodiment 1 of this invention. It is an illustration figure which shows one usage example of the book data display apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows the display of the object in the book data display apparatus in the usage example shown in FIG. It is a flowchart explaining the process of the book data display apparatus which concerns on Embodiment 2 of this invention in the usage example shown in FIG. It is an illustration figure which shows an example of the selection reception screen in the book data display apparatus which concerns on Embodiment 2 of this invention. It is an illustration figure which shows the change display of a color in the book data display apparatus which concerns on Embodiment 2 of this invention. It is a functional block diagram which shows the principal part structure of the book data display apparatus of Embodiment 3 of this invention.

  Hereinafter, the display device, the display method, and the computer program according to the embodiment of the present invention will be described in detail with reference to the drawings, taking as an example a case of applying to a book data display device having a so-called electronic book function.

(Embodiment 1)
FIG. 1 is a functional block diagram showing a main configuration of a book data display device 100 according to Embodiment 1 of the present invention.
The book data display device 100 according to Embodiment 1 of the present invention includes a touch panel 2, an imaging unit 3, a display unit 4, a timing unit 5, a storage unit 6, and an operation unit 8. These hardware are connected to the control unit 1 via the bus N.

  The display unit 4 includes, for example, a transmissive liquid crystal panel and a transparent organic EL (Electroluminescence) panel. Specifically, in the organic EL panel, the electroluminescent layer is sandwiched between upper and lower transparent conductive films, and these are further sealed from above and below with a transparent substrate such as a glass plate, and an organic EL display element that drives the transparent conductive film ( (TFT) and other drive circuit areas and the display area where light generated in the electroluminescent layer is emitted do not overlap so that light can be emitted in the vertical direction of the electroluminescent layer. It is an EL panel.

  On a display screen 41 (to be described later) of the display unit 4, an object such as an electronic book content is displayed by the light emission of the organic EL panel. Therefore, when the object is not displayed, the back side is seen through the whole organic EL panel, and when the object is displayed, the back side is seen through the portion where the object is not displayed. That is, the user on the front side of the display screen 41 can visually recognize the back side of the display screen 41. The touch panel 2 is provided so as to cover the display screen 41 of the display unit 4.

  The touch panel 2 is transparent and includes a plate member provided so as to cover the display screen 41 of the display unit 4. The touch panel 2 receives a position designation on the display screen 41 of the display unit 4 by a user's touch operation on the plate member. Specifically, the touch panel 2 detects a change in pressure due to the touch operation of the user's fingertip or detects an electric signal due to static electricity on the display screen 41 of the display unit 4 corresponding to the contact point of the user's fingertip. Coordinates are detected and a signal specifying the coordinates is generated. The touch panel 2 is not limited to this, and may include a pointing device (for example, a stylus pen).

  The imaging unit 3 captures a video on the back side of the display screen 41 (hereinafter, back side video). Specifically, the imaging unit 3 includes a camera including an imaging element such as a CCD (Charge Coupled Device) image sensor, acquires the shooting data obtained by shooting the back side of the display screen 41 via the camera, and the back side video. Is generated.

  FIG. 2 is an explanatory diagram illustrating the configuration of the camera 31 in the book data display device 100 according to Embodiment 1 of the present invention. The camera 31 is provided on the upper side of a frame 42 surrounding the display screen 41 (organic EL panel). The camera 31 includes a spherical part 33 having a spherical shape and a cylindrical lens part 32 protruding from the spherical part 33. The camera 31 has a spherical part 33 fitted in a spherical shell-shaped receiving part 34 so as to be rotatable and tiltable. Specifically, the receiving portion 34 has a hollow shaped like the spherical portion 33 inside, and a circular opening is formed toward the back side of the display screen 41. Accordingly, the spherical portion 33 is fitted inside the receiving portion 34 with the lens portion 32 exposed to the outside through the opening, and the lens portion 32 can be rotated and tilted with the opening as a radius. That is, since the camera 31 is engaged with the receiving portion 34 like a ball joint, the user can change the imaging direction of the camera 31.

  The storage unit 6 is configured by a non-volatile storage medium such as a flash memory, EEPROM, HDD, MRAM (magnetoresistance memory), FeRAM (ferroelectric memory), or OUM, for example. Further, book data is stored in the storage unit 6. The book data is composed of image data corresponding to each page of the electronic book, and the image data is sent to the control unit 1 for each page, and processing on the image data is appropriately performed. An image (object) based on the processed image data is displayed on the display unit 4.

  The operation unit 8 is provided with a plurality of buttons for receiving various instructions from the user. For example, the operation unit 8 is provided with an on / off button, a + -type button used when the user selects a page of the electronic book to be displayed on the display screen 41, a determination button for accepting the user's determination, and the like. It has been.

  The time measuring unit 5 measures the passage of time from the current time and a predetermined time, and passes the time measurement result to the control unit 1. The control unit 1 performs processing such as color comparison and color determination related to the change based on the timing result of the timing unit 5.

FIG. 3 is a functional block diagram showing a main configuration of the control unit 1 in the book data display device 100 according to Embodiment 1 of the present invention.
The control unit 1 includes a CPU 11, a ROM 12, a RAM 13, a buffer memory 14, a display image feature value extraction unit 15, a captured image feature value extraction unit 16, a change unit 17, a comparison unit 18, and a determination unit 19. And a selection receiving unit 20 and a display control unit 21.

  The ROM 12 stores in advance fundamentally fixed data among various control programs and calculation parameters, and the RAM 13 temporarily stores the data and reads it regardless of the storage order, storage position, etc. Is possible. The RAM 13 stores, for example, a program read from the ROM 12, various data generated by executing the program, parameters that change as appropriate during the execution, and the like. Further, the image data of the electronic book sent from the storage unit 6 is stored in the RAM 13 page by page.

  The CPU 11 loads the control program stored in advance in the ROM 12 onto the RAM 13 and executes it, thereby controlling the above various hardware via the bus N, and the entire apparatus as a book data display device 100 of the present invention. To act as.

  The buffer memory 14 obtains image data for each page of the electronic book to be displayed on the display unit 4 (hereinafter referred to as a display image) from the RAM 13 one page at a time and temporarily stores the image data.

  The display image feature amount extraction unit 15 extracts the feature amount of the display image stored in the buffer memory 14. For example, the display image feature amount extraction unit 15 extracts feature amounts (RGB values) related to the color of the display image.

  The captured image feature amount extraction unit 16 extracts the feature amount of the captured image (backside video) acquired from the imaging unit 3. For example, the captured image feature amount extraction unit 16 extracts feature amounts (RGB values) related to the color of the captured image.

  The comparison unit 18 compares the display image stored in the buffer memory 14 with the captured image (backside video) from the imaging unit 3. For example, the comparison unit 18 obtains the color similarity between the display image and the back video. The similarity between the colors is obtained based on the RGB values of the display target extracted by the display image feature amount extraction unit 15 and the RGB values of the captured image extracted by the captured image feature amount extraction unit 16. A known technique for calculating the color similarity is used. For example, the inner product of the RGB value of the display image and the RGB value of the captured image is obtained, and the number related to the inner product is used as the color similarity.

  In the following description, the case where the comparison unit 18 obtains the color similarity and compares the display image and the back video is described as an example, but the present invention is not limited to this. For example, the similarity is not limited to the colors of the display image and the backside video, and the similarity in saturation and brightness may be obtained.

  The determination unit 19 determines a predetermined color based on the result of the comparison by the comparison unit 18, that is, the calculation result of the color similarity between the display image and the back video. In other words, a color (hereinafter, referred to as a change color) for displaying the display image by changing the color of the display image based on the image data already stored in the buffer memory 14 is specified. For example, when the color similarity between the display image and the back side video is equal to or greater than a predetermined threshold, the determination unit 19 determines a complementary color for the color specified from the RGB values of the back side video as the change color.

  The changing unit 17 changes the image data so that the color of the display image related to the image data stored in the buffer memory 14 becomes the changed color determined by the determining unit 19. Therefore, when an object such as a character or a graphic is included in the display image, the color of the object is changed from the original color to the changed color and displayed on the display unit 4.

  The selection receiving unit 20 receives from the user the selection of the color of the back side video in the calculation of the color similarity by the comparison unit 18. Specifically, the selection receiving unit 20 receives a color relating to a predetermined image area on a backside image displayed on a selection receiving screen described later as a selected color, and extracts a feature amount of the color of the image area. In this way, the captured image feature amount extraction unit 16 is instructed. The captured image feature amount extraction unit 16 extracts the RGB value of the color of the image area in response to the instruction.

  The present invention is not limited to this. For example, the selection receiving unit 20 may be configured to receive selection of saturation and lightness of the image area.

  The display control unit 21 is configured by a processor such as a DSP (Digital Signal Processor), and displays an image based on the image data stored in the buffer memory 14 on the display unit 4. Further, the display control unit 21 displays an image based on the image data whose color has been changed by the changing unit 17 on the display unit 4.

  Hereinafter, the operation of the book data display device 100 according to Embodiment 1 of the present invention will be described in detail.

  FIG. 4 is an exemplary diagram showing one usage example of the book data display device 100 according to Embodiment 1 of the present invention, and FIG. 5 is a display of objects on the book data display device 100 in the usage example shown in FIG. FIG. For convenience of explanation, portions having similar colors are hatched in the same direction.

  As one example of use of the book data display device 100 according to Embodiment 1 of the present invention, as shown in FIG. 4, the color of characters displayed on the display screen 41 and the back side of the display screen 41, The case where the color of the part visually recognized via the display screen 41 is the same is assumed.

  That is, as shown in FIG. 5, the “ABCD” character displayed on the display screen 41 overlaps with a single-color curtain visually recognized through the display screen 41, and the color of the “ABCD” character When the color of the curtain is a similar color, the background of the character is the same color as the character, making it difficult to visually recognize the character. In such a case, the book data display device 100 according to the first embodiment of the present invention changes the color of such characters to make the characters stand out from the background.

  FIG. 6 is a flowchart for explaining processing of the book data display device 100 according to Embodiment 1 of the present invention in the usage example shown in FIG. For convenience of explanation, the display of an electronic book having a total of 10 pages will be described with reference to FIG. 4 as an example in which the user instructs the book data display device 100.

  As described above, when an instruction to display the electronic book is received from the user, first, image data corresponding to one page among the image data of the electronic book stored in the storage unit 6 is sent to the RAM 13. Then, the CPU 11 transmits the image data corresponding to the one page to the buffer memory 14 and stores it (step S101).

  Next, the CPU 11 acquires the back side image captured by the imaging unit 3 (step S102).

  The comparison unit 18 calculates the degree of similarity between the acquired back side video and the display image based on the image data stored in the buffer memory 14 (step S103). Specifically, as described above, the display image feature quantity extraction unit 15 extracts the RGB values of the display target, the captured image feature quantity extraction unit 16 extracts the RGB values of the back side video, and the comparison unit 18 includes them. Based on this, the color similarity in the display image and the backside video is calculated.

  Further, the CPU 11 determines whether or not the color similarity calculated by the comparison unit 18 is equal to or greater than a predetermined threshold (step S104). If the CPU 11 determines that the similarity is not equal to or greater than the predetermined threshold (step S104: NO), the process proceeds to step S107.

  On the other hand, as shown in FIG. 4, when the color of the character (object) and the backside video shown on the display screen 41 are similar colors, the CPU 11 determines that the similarity is not less than a predetermined threshold (step S104: YES). At this time, the determination unit 19 determines a changed color (step S105). The determination of the changed color by the determination unit 19 has already been described above, and a detailed description thereof will be omitted.

  Next, the changing unit 17 changes the image data so that the color of the display image related to the image data of one page stored in the buffer memory 14 becomes the changed color determined by the determining unit 19 (step S106). ).

  The display control unit 21 displays an image of one page on the display unit 4 based on the image data changed by the changing unit 17 (step S107).

  FIG. 7 is an exemplary diagram showing a color change display in the book data display device 100 according to the first embodiment of the present invention. As described above, since the complementary color of the color of the back side image is determined as the change color, the color of the character “ABCD” is displayed on the display unit 4 (display screen 41) as the complementary color of the color of the back side curtain (FIG. 7). Displayed with diagonal lines in the opposite direction to the curtain).

  Next, the CPU 11 checks the RAM 13 to determine whether or not the image data has been updated (step S108). That is, when the user who has read one page instructs the display of the next page (two pages) by operating the + button of the operation unit 8, the image data of the second page is stored from the storage unit 6. Since the data is sent to the RAM 13, the CPU 11 makes the determination by checking whether image data of other pages is stored in the RAM 13.

  If the CPU 11 determines that the image data has been updated (step S108: YES), the process returns to step S101. On the other hand, when determining that the image data has not been updated (step S108: NO), the CPU 11 monitors the on / off button of the operation unit 8 to determine whether an end instruction has been received (step S109). ).

  If the CPU 11 determines that an end instruction has been received (step S109: YES), the process ends. On the other hand, if the CPU 11 determines that an end instruction has not been received (step S109: NO), the CPU 11 instructs the time measuring unit 5 to start time measurement.

  Thereafter, the CPU 11 acquires a time measurement result from the time measuring unit 5, and determines whether or not a predetermined time has elapsed based on the time measurement result (step S110).

  CPU11 returns a process to step S108, when it determines with predetermined time not having passed (step S110: NO). On the other hand, if the CPU 11 determines that the predetermined time has elapsed (step S110: YES), the process returns to step S102.

  Since the book data display device 100 according to Embodiment 1 of the present invention has the above-described configuration, the color of the object displayed on the display unit 4 (display screen 41) and the background color of the object are determined. When the colors are similar, the object can be prevented from becoming difficult to visually recognize.

  As described above, when changing the color of the object and displaying it, it is performed at a predetermined time interval to prevent frequent color changes and to relieve the eyes of the user. Can be suppressed.

(Embodiment 2)
FIG. 8 is an exemplary diagram showing one usage example of the book data display device 100 according to Embodiment 2 of the present invention, and FIG. 9 is a display of objects on the book data display device 100 in the usage example shown in FIG. FIG. For convenience of explanation, portions having similar colors are hatched in the same direction.

  As one example of use of the book data display device 100 according to Embodiment 2 of the present invention, as shown in FIG. 8, the color of the portion that is behind the display screen 41 and is visually recognized through the display screen 41 Are mixed, and one of the plurality of colors and the color of the character displayed on the display screen 41 are the same or similar.

  That is, as shown in FIG. 9, a part of the “ABCD” character displayed on the display screen 41 overlaps with the curtain viewed through the display screen 41, and the color of the “ABCD” character When the color of the curtain as a part of the background is a similar color, it is difficult to visually recognize a part of the character. In such a case, the book data display device 100 according to the second embodiment of the present invention receives a selection of a predetermined color from the user, changes the color of the character based on this color, and visually recognizes the character. Make it easier.

  FIG. 10 is a flowchart for explaining processing of the book data display device 100 according to Embodiment 2 of the present invention in the usage example shown in FIG. For convenience of explanation, the display of an electronic book having a total of 10 pages will be described with reference to FIG. 9, taking as an example a case where the user instructs the book data display device 100.

  As described above, when an instruction to display the electronic book is received from the user, first, image data corresponding to one page among the image data of the electronic book stored in the storage unit 6 is sent to the RAM 13. Then, the CPU 11 transmits the image data corresponding to the one page to the buffer memory 14 and stores it (step S201).

  Next, the CPU 11 acquires a back side image captured by the imaging unit 3 (step S202).

  The display control unit 21 displays a selection reception screen on the display unit 4 using the acquired back side image (step S203). FIG. 11 is an exemplary view showing an example of a selection reception screen in the book data display device 100 according to Embodiment 2 of the present invention.

  The selection acceptance screen includes a back side image captured by the imaging unit 3 and a region designation frame (displayed by a dotted line in FIG. 11) superimposed on the back side image. The area designating frame can be changed in size and moved to a predetermined position by a drag-and-drop operation from a so-called user or by an operation of the + button.

  For example, after the user moves the region designation frame on the curtain image (arrow method in FIG. 11) by drag and drop operation, the user performs an operation of pressing the determination button of the operation unit 8. In this case, a signal specifying the coordinates of the area designation frame after movement is sent from the touch panel 2 to the control unit 1.

  Based on the signal, the selection receiving unit 20 of the control unit 1 receives the color of the image region corresponding to the region designation frame on the back side image, that is, the curtain color as the selected color (step S204).

  The comparison unit 18 calculates the similarity between the acquired back side image and the display image stored in the buffer memory 14 (step S205). Specifically, the display image feature amount extraction unit 15 extracts the RGB value of the display target, and the captured image feature amount extraction unit 16 extracts the RGB value of the color of the image region corresponding to the region designation frame of the selection reception screen. To do. Based on these, the comparison unit 18 calculates the color similarity in the display image and the back video.

  Further, the CPU 11 determines whether or not the color similarity calculated by the comparison unit 18 is equal to or greater than a predetermined threshold (step S206). If the CPU 11 determines that the similarity is not equal to or greater than the predetermined threshold (step S206: NO), the process proceeds to step S209.

  On the other hand, when the color of the image area corresponding to the area designation frame on the selection acceptance screen and the character (object) shown on the display screen 41 are similar colors, the similarity is equal to or greater than a predetermined threshold by the CPU 11. Is determined (step S206: YES). At this time, the determination unit 19 determines a changed color (step S207). The determination of the changed color by the determination unit 19 has already been described above, and a detailed description thereof will be omitted.

  Next, the changing unit 17 changes the image data so that the color of the display image related to one page of image data stored in the buffer memory 14 becomes the changed color determined by the determining unit 19 (step S208). ).

  The display control unit 21 displays an image of one page on the display unit 4 based on the image data changed by the changing unit 17 (step S209).

  FIG. 12 is an exemplary diagram showing a color change display in the book data display device 100 according to Embodiment 2 of the present invention. As described above, since the complementary color of the color of the back side image is determined as the change color, the color of the character “ABCD” is displayed on the display unit 4 (display screen 41) as the complementary color of the color of the back side curtain (FIG. 12). Displayed with diagonal lines in the opposite direction to the curtain).

  The subsequent processing from step S210 to step S212 is the same as the processing from step S108 to step S110 in FIG.

  Since the book data display device 100 according to Embodiment 2 of the present invention has the above-described configuration, the color of the object displayed on the display control unit 21 and the color of a part of the background of the object are the same. In the case of a color or a similar color, the user can selectively change the color of the object and enhance its visibility.

  The present invention is not limited to the above configuration. When the object color is changed and displayed, the color may be changed with time. For example, the color change display may be performed by sequentially changing the colors up to the change color in the order of the colors on the hue circle. As a result, it is possible to prevent a sudden change in color and suppress fatigue of the eyes of the user.

  The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  On the other hand, it is assumed that the back side state (background) visually recognized by the user via the display screen 41 is different from the back side image captured by the imaging unit 3.

  That is, the state of the back side visually recognized via the display screen 41 varies depending on the user or how to use (hold). For example, when the display screen 41 is positioned in front of the user's eyes, when positioned above the eyes, or positioned below the eyes, the state of the back side visually recognized through the display screen 41 is different. Further, the user may use the book data display device 100 in a tilted state. Therefore, the back side state (background) visually recognized by the user via the display screen 41 may be different from the back side image captured by the imaging unit 3. In such a case, as described above, it is impossible to expect the effect of changing and displaying the color of the object.

  However, as described above, the book data display device 100 of the present invention is configured so that the user can change the imaging direction of the camera 31, so that the background visually recognized via the display screen 41 and Even when the back side image captured by the imaging unit 3 is different, the user can adjust the imaging direction to match the background and back side images.

(Embodiment 3)
FIG. 13 is a functional block diagram showing a main configuration of the book data display device 100 according to Embodiment 3 of the present invention. The book data display device 100 according to the third embodiment is configured such that a computer program for performing an operation can be provided on a portable recording medium A such as a CD-ROM via the I / F 7. Yes. Further, the book data display device 100 according to the third embodiment is configured such that the computer program can be downloaded from an external device (not shown) via the communication unit 9. The contents will be described below.

  The book data display device 100 according to the third embodiment includes an exterior (or interior) recording medium reading device (not shown), and the recording medium reading device includes a color of a captured image (backside image), and A portable recording medium A on which is recorded a program for comparing the colors of objects (display images), determining a predetermined color (changed color) based on the comparison result, and changing and displaying the color of the object based on the determination result. For example, the CPU 11 installs this program in the ROM 12. Such a program is loaded into the RAM 13 and executed. Thereby, it functions as the book data display device 100 of the present invention according to the first and second embodiments.

The recording medium may be a so-called program medium, a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a flexible disk and a hard disk, and a disk system of an optical disk such as a CD-ROM / MO / MD / DVD, It may be a medium carrying a fixed program code including a card system such as an IC card (including a memory card) / optical card or a semiconductor memory such as a mask ROM, EPROM, EEPROM, flash ROM or the like.

  It may be a medium that fluidly carries the program code so as to download the program code from the network via the communication unit 9. When the program is downloaded from the communication network in this way, the download program may be stored in the main device in advance or may be installed from another recording medium. The present invention can also 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.

  The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

DESCRIPTION OF SYMBOLS 1 Control part 2 Touch panel 3 Imaging part 4 Display part 5 Timekeeping part 11 CPU
17 changing unit 18 comparing unit 19 determining unit 20 selection receiving unit 21 display control unit 41 display screen 100 book data display device A recording medium

Claims (8)

In a display device comprising a translucent display screen and displaying an object to be viewed by a viewer on the front side of the display screen,
Imaging means for imaging the back side of the display screen;
A comparison means for comparing the color of the captured image and the color of the object;
Determining means for determining a predetermined color based on the comparison result of the comparing means;
A display device comprising: changing means for changing and displaying the color of the object based on a determination result of the determining means. A selection receiving means for receiving a color selection;
The comparison means includes
The display device according to claim 1, wherein the display device is configured to compare a color related to the selection received by the selection receiving unit with a color of the object. With timekeeping means,
The display device according to claim 1, wherein the display unit is configured such that the comparison by the comparison unit or the determination by the determination unit is performed based on a timing result of the timing unit.   4. The display device according to claim 1, wherein the changing unit is configured to change the color of the object over time.   The display device according to claim 1, wherein an imaging direction by the imaging unit is variable. In a display method for displaying an object on a display device including a translucent display screen that displays an object to be viewed by a viewer on the front side, and an imaging unit that images the back side of the display screen,
A comparison step of comparing the color of the captured image and the color of the object;
A determination step for determining a predetermined color based on the comparison result in the comparison step;
And a changing step for changing and displaying the color of the object based on the determination result in the determining step. In a computer program for displaying an object on a computer constituting a display device comprising a translucent display screen for displaying an object to be viewed by a front viewer and an imaging means for imaging the back side of the display screen,
A comparison step for causing the computer to compare the color of the captured image and the color of the object;
A determination step of causing a computer to determine a predetermined color based on the comparison result in the comparison step;
A computer program for causing a computer to execute a changing step of changing and displaying the color of the object based on a determination result in the determining step.   A computer-readable recording medium on which the computer program according to claim 7 is recorded.

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