JP2015230560A - Display terminal device, program, and display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve user convenience by allowing a user to surely recognize a display position of a target part such as a menu button even when a visually disabled user uses a display terminal device.SOLUTION: A communication terminal device 10 is configured to execute following processes including: (1) to receive an input operation of a user, (2) to allow a display screen to display a part to be targeted by the user on a displayed screen according to the received input operation, and (3) to execute a display assist process for allowing the display screen to display a back ground image having a gradation in which a level of color feature quantity is changed according to a distance from the specified target part.

Description

  The present invention relates to a display terminal device, a program, and a display method for displaying a predetermined image.

  In recent years, with the improvement and popularization of information communication terminal devices (hereinafter referred to as “communication terminal devices”) such as tablet-type information communication terminals, smart phones, electronic book browsing terminal devices, etc., users can cope with their desired books. Content data (so-called electronic book) to be acquired is acquired from a server device on WWW (World Wide Web) and can be viewed (read) at any time.

  In this type of communication terminal device, due to the recent enlargement of the screen and the penetration of the touch panel, when displaying content such as e-books, menu buttons and menu bars or important inputs are displayed in the peripheral area and other areas of the display screen. The tools are often displayed as icons, and by operating these icons, various important functions that can be selected such as transition to the home screen and access to various functions are often executed.

  On the other hand, a visually impaired person such as narrowed visual field has a remarkably narrow visual field, and therefore, there are many cases where an important icon such as a menu button does not exist in the visual field due to other operations or other influences and the menu cannot be recognized. In particular, important icons are often displayed at the edge of the display screen, and the point of interest is far from the position where the important icon is displayed due to operations such as displaying the icon on the screen. The probability that the important icon cannot be recognized increases.

  Thus, recently, a method has been proposed in which button positions are presented to the user by blinking operable buttons while the screen is displayed (for example, Patent Document 1).

WO2004-081778 pamphlet

  However, in the method described in Patent Document 1, it is difficult for the user to recognize the button position even if the button blinks unless the button enters the peripheral visual field of the user. When used by a user with visual impairment, there are many cases where functions such as blinking cannot be sufficiently exhibited.

  The present invention has been made to solve the above-described problems, and even when used by a user with visual field impairment, allows the user to reliably recognize the position of the screen operation and the like, and improves the convenience of the user. An object of the present invention is to provide a display terminal device capable of performing

  (1) In order to solve the above-described problem, a display terminal device according to the present invention includes a display unit, a reception unit that receives a user's input operation, and a screen displayed on the display unit according to the received input operation. A display control unit that causes the display unit to display on the display unit a portion that should be focused on by the user, and the display control unit changes the degree of the color feature amount according to the distance from the identified site of interest. The displayed background image is displayed on the display means.

  With this configuration, for example, the display terminal device according to the present invention can display a background image such as a gradation in which the value of the color feature value changes as the distance from the target region that is an important screen display such as a menu button increases. it can.

  Therefore, the display terminal device according to the present invention can display its own visual field even if it is a user whose visual field size is limited, such as a visually impaired person, for example, the color feature amount becomes brighter as it gets closer to the region of interest. Can be guided to the site of interest according to the change in the degree of the color feature amount of gradation or hue, such as a bright direction or a dark color direction, so that if a part of the screen can be visually recognized According to the change in the degree of the color feature amount, the position where the target site is displayed can be easily recognized and the visibility of the user can be improved.

  (2) In addition, the display terminal device according to the present invention has a configuration in which the color feature amount includes at least one of brightness, saturation, hue, luminance, and color difference.

  With this configuration, the display terminal device according to the present invention can display a gradation-like background image defined by gradation values or values of lightness, saturation, hue, luminance, and color difference. Thus, the position where the site of interest is displayed can be reliably recognized.

  (3) Further, in the display terminal device according to the present invention, when the color feature amount includes at least one of lightness, saturation, and luminance, the display control unit is configured to detect the specified region of interest. The background image in which the degree of the color feature amount is changed is displayed on the display unit by increasing or decreasing the gradation value of the color feature amount as the distance to the region of interest increases. have.

  With this configuration, the display terminal device according to the present invention can guide the user's gazing point in the brightest direction or the darkest direction, so the position where the site of interest is displayed based on the color change can be easily determined. And it can be made to recognize reliably.

  (4) Further, in the display terminal device according to the present invention, the display control means may be configured such that the gradation value of the color feature value of the target region is higher or lower than the gradation value of the color feature value of the other part. An image is displayed on the display means.

  With this configuration, the display terminal device according to the present invention can guide the user's gaze point in the brightest direction or the darkest direction, so that the position where the site of interest is displayed based on the color change can be easily determined. And it can be made to recognize reliably.

  (5) Further, in the display terminal device according to the present invention, the display control unit causes the display unit to display the background image that brightens the tone value of the color feature amount as the display unit approaches the target region. It has a configuration.

  With this configuration, the display terminal device according to the present invention can guide the user's gazing point in the brightest direction, so that the position where the site of interest is displayed based on the color change can be easily and reliably obtained. Can be recognized.

  (6) In the display terminal device according to the present invention, when the color feature amount is a hue or a color difference, the display control unit is close to the target site while following the distance from the specified target site. Accordingly, by changing the gradation value from one color to another color, the background image in which the degree of the color feature amount is changed is displayed on the display means.

  With this configuration, the display terminal device according to the present invention can select one of the colors from RGB (red, green, blue) or CMY (cyan, magenta, yellow) from one color to another color or an intermediate color between two colors. A gradation-like background image can be displayed by changing the gradation value to any one of the colors, so that the position where the site of interest is displayed is surely recognized based on the color change. Can do.

  (7) The display terminal device according to the present invention further includes visual field information acquisition means for acquiring visual field information indicating a user's visual field area, and the display control means includes the color feature in the visual field area. The background image in which the degree of the color feature amount is changed is displayed on the display unit in accordance with the distance from the identified region of interest so that the color change in the amount can be recognized.

  With this configuration, the display terminal device according to the present invention, for example, by setting the gradation value of the target region to one color of RGB (red, green, blue) or CMY (cyan, magenta, yellow), It is possible to reliably recognize the position where the target region is displayed based on the color change, and to accurately grasp the visual field area of the visually impaired user, and to change the gradation or hue within the visual field area. Since the degree of the color feature amount can be changed, it is possible to reliably guide the user to the site of interest and recognize the site of interest.

  (8) Further, in the display terminal device according to the present invention, the display control unit causes the display unit to display the background image in which the gradation value of the region of interest is the gradation value of the one color or the other color. It has a configuration to display.

  With this configuration, the display terminal device according to the present invention can guide the user's gaze point in the direction of becoming one color or another color, so the position where the target region is displayed based on the color change It can be easily and reliably recognized.

  (9) The display terminal device according to the present invention further includes visual field information acquisition means for acquiring visual field information indicating a user's visual field area, and the display control means includes the color feature in the visual field area. A recognizable gradation difference in amount occurs, and the background image in which the degree of the color feature amount is changed is displayed on the display unit in accordance with the distance from the identified region of interest.

  With this configuration, the display terminal device according to the present invention can be used even by a user who has a limited field of view, such as a visually impaired person, such as the color feature amount becoming brighter as the region of interest approaches. In the field of view, it can be guided to the site of interest in accordance with a change in the degree of the color feature amount of gradation or hue such as a bright direction or a dark color direction.

  (10) In addition, in the display terminal device according to the present invention, the background in which the display control unit changes the degree of the color feature amount with a predetermined gradation difference while following the distance from the identified region of interest. An image is displayed on the display means.

  With this configuration, the display terminal device according to the present invention, for example, a difference between predetermined gradation values in a predetermined color feature amount such as a web-safe color used when displaying a color correctly on any electronic display ( The color feature between the adjacent colors of the gradation display (that is, the color feature based on the gradation difference) can be defined by the color difference, so that the user can recognize the gradation difference and It is possible to surely guide to the site of interest to recognize the site of interest, and to suppress the occurrence of colored wrinkles in the user or the administrator.

  (11) Further, according to the program of the present invention, the user pays attention to the computer in the reception unit that receives the input operation of the user and the screen displayed on the display unit according to the received input operation. A display control unit that causes the display unit to display the power region as the target region, and a background image in which the degree of the color feature amount is changed is displayed on the display unit according to the distance from the identified target region. doing.

  With this configuration, the program according to the present invention can display, for example, a background image such as a gradation in which the value of the color feature value changes as the distance from the target region that is an important screen display such as a menu button increases.

  Therefore, the display terminal device according to the present invention can display its own visual field even if it is a user whose visual field size is limited, such as a visually impaired person, for example, the color feature amount becomes brighter as it gets closer to the region of interest. Can be guided to the site of interest according to changes in the color features of gradation or hue, such as the bright direction or the dark color direction, so if a part of the screen can be visually recognized, According to the change in the degree of the feature amount, the position where the target region is displayed can be easily recognized, and the visibility of the user can be improved.

  (11) Further, the display method according to the present invention includes a step of accepting a user input operation, and a portion to which the user should pay attention in a screen displayed on the display unit according to the accepted input operation. And displaying on the display means as a site of interest, and displaying on the display means a background image in which the degree of color feature amount is changed according to the distance from the identified site of interest.

  With this configuration, the display method according to the present invention can display, for example, a background image such as a gradation in which the value of the color feature value changes as the distance from the region of interest that is an important screen display such as a menu button increases. .

  Therefore, the display method according to the present invention can be applied to a user who has a limited field of view such as a visually impaired person, for example, the color feature amount becomes brighter as the region of interest is closer. Can be guided to the site of interest according to the change in the degree of the color feature amount of the gradation or hue such as the bright direction or the dark color direction, so that if a part of the screen can be visually recognized, According to the change in the degree of the color feature amount, the position where the target site is displayed can be easily recognized, and the visibility of the user can be improved.

  The display terminal device or the like according to the present invention is a color feature amount of gradation or hue such as a bright direction or a dark color direction in its own field of view, even if the user has a limited field of view such as a visually impaired person. Can be guided to the site of interest according to the change in the degree of color, so if a part of the screen can be visually recognized, the site of interest is displayed according to the change in the degree of the color feature amount. The position can be easily recognized and the visibility of the user can be improved.

It is a system configuration figure showing the composition of the information service system in one embodiment of the present invention. In the communication terminal device of one Embodiment, it is a figure which shows an example of the display aspect of the background image in a display area when the attention site | part is displayed. It is a block diagram which shows the structure of the communication terminal device of one Embodiment. It is a figure for demonstrating the production | generation principle of a background image (gradation) in the communication terminal device of one Embodiment. It is a flowchart which shows the display data generation process performed with the communication terminal device of one Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the display of the present invention is shown for an electronic book providing system having a communication terminal device used by a user and an electronic book providing server device connected to the communication terminal device via a network. It is an embodiment when a terminal device, a program, and a display method are applied.

[1] Electronic Book Providing System First, the configuration and outline of the electronic book providing system 1 according to the present embodiment will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a system configuration diagram showing the configuration of the information providing system 1 in the present embodiment, and FIG. 2 is a background in a display area when a site of interest is displayed in the communication terminal device 10 of the present embodiment. It is a figure which shows an example of the display mode of an image. In order to prevent the figure from becoming complicated, only some users are shown in FIG. That is, in the actual electronic book providing system 1, there are a larger number of communication terminal devices than those displayed in FIG.

  The electronic book providing system 1 according to the present embodiment is a system that provides electronic user data including text as content data so that the user can view it. The communication terminal device 10 used by the user, the network 20, and the electronic book And an electronic book providing server device 30 for managing the information.

  The communication terminal device 10 is a communication terminal device such as a personal computer, a tablet-type information communication terminal device, a smartphone, or an electronic book reader, and acquires (downloads) electronic book data from the electronic book providing server device 30 via the network 20. It has a function to do. The communication terminal apparatus 10 has a reader function for displaying electronic book data described in a format such as EPUB (epub) on the display panel.

  In particular, when the communication terminal device 10 performs predetermined display such as content based on electronic book data, the communication terminal device 10 determines the degree of color feature amount (that is, color feature) according to the distance from the site of interest on which the user should pay attention on the display screen. A background image with a changed amount of gradation or hue) is displayed.

  Then, the communication terminal device 10 allows the user to recognize menu buttons, other buttons, pop-up displays, or important notices for accessing various functions (highlight functions, etc.) that can be used while displaying electronic book data. The display part is used as a site of interest.

Specifically, the communication terminal device 10 of the present embodiment is
(1) Accept user input operations,
(2) In accordance with the received input operation, the part that the user should focus on is displayed on the display screen as the part of interest in the displayed screen,
(3) displaying a background image in which the degree of the color feature amount is changed according to the distance from the identified region of interest on the display screen;
The display assist process is executed.

  For example, the communication terminal device 10 according to the present embodiment, as shown in FIG. 2, has a gradation that changes the degree of color feature amount such as lightness, saturation, hue, luminance, and color difference according to the distance from the identified region of interest. It has a configuration capable of executing gradation display for displaying a background image on a display screen.

  In general, in the case of a user with visual field impairment such as visual field stenosis or visual field defect, it is often impossible to overlook the entire display area. Is often not visible. In addition, when the specific display is an edge of the display area and the other display is an up / down or left / right opposite edge, in most cases, the other display exists in an invisible area. Become.

  On the other hand, even if the visual field range is narrow due to visual field obstruction, etc., if there are differences in color features such as brightness, saturation, hue, luminance, and color difference in the background, etc. Can be recognized, and when a gradation display based on the difference such as a bright direction or a dark color direction is made, if the gazing point is moved along the gradation, the color feature amount can be further increased. Since there is a difference, if the gradation of the color feature amount is added along the direction in which the point of interest is to be guided, the point of interest can be guided to the target display.

  Therefore, the communication terminal device 10 of the present embodiment follows the distance from the region of interest while guiding the gaze point to the region to be visually recognized, regardless of the region of the display region. The color feature value changes to a gradation value that becomes brighter as the color becomes closer to, and a background image is displayed based on the changed gradation value, or a background image is displayed from one color to another. It is supposed to let you.

  With this configuration, the communication terminal device 10 according to the present embodiment has a color feature amount such as a bright direction or a dark color direction in its own field of view even if the user has a limited field of view such as a visually impaired person. Since it can be guided to the site of interest according to the change in the degree, if a part of the screen can be visually recognized, the point of interest is guided to the site of interest according to the change in the degree of the color feature amount. And the position where the said region of interest is displayed can be easily recognized. Therefore, the communication terminal device 10 according to the present embodiment can improve the visibility of the user.

  The electronic book providing server device 30 has an electronic book database 40 in which electronic book data corresponding to electronic books that can be provided to a user is recorded, and distributes electronic book data in accordance with a request from the communication terminal device 10.

[2] Communication Terminal Device Next, the communication terminal device 10 of this embodiment will be described with reference to FIGS. 3 and 4. FIG. 3 is a block diagram showing the configuration of the communication terminal device 10 of the present embodiment, and FIG. 4 is a diagram for explaining the principle of generating a background image (gradation) in the communication terminal device 10.

  As illustrated in FIG. 3, the communication terminal device 10 according to the present embodiment includes a communication control unit 110 that is communicatively connected to the network 20, a display unit 130, and a display control unit 140 that controls display of images on the display unit 130. A data recording unit 150 in which various types of data are recorded, an operation unit 170 including a touch panel, an application execution unit 180 for executing display assist processing, and a terminal management control unit 190. The above units are connected to each other by a bus B.

  The communication control unit 110 is a predetermined network interface, and the electronic book providing server device 30 connected to the network 20 through the base station BS under the control of the application execution unit 180 and the terminal management control unit 190, or A communication line is constructed with another communication terminal device that does not, and various data are exchanged with the electronic book providing server device 30 or another communication terminal device that is not shown.

  The display unit 130 is configured by a panel of a liquid crystal element or EL (Electro Luminescence) element having an image display area of a predetermined size (for example, 5 inches, W 1920 × H 1080 pixels), and drawing data generated by the display control unit 140 A predetermined image is displayed based on the above. For example, the display unit 130 of the present embodiment constitutes a display unit of the present invention, for example.

  When displaying the content on the display unit 130 based on the electronic book data, the display control unit 140 generates drawing data for displaying an image in which a mask image is superimposed on the content to be displayed based on the electronic book data. And output to the display unit 130.

  The data recording unit 150 includes, for example, an EEPROM (Electrically Erasable Programmable Read Only Memory) or a flash memory.

  In addition, the data recording unit 150 records various applications such as an electronic book reader application (hereinafter referred to as “reader application”) for a user to read (read) an electronic book including execution of display assist processing. An application recording unit 151, a visual field information recording unit 152 for recording user visual field information, an electronic book data recording unit 153 for recording electronic book data, and various reference data necessary for executing display assist processing Is recorded, and a RAM 155 used as a work area.

  In particular, the visual field information recording unit 152 records visual field information registered in advance by the user. The visual field information registration method of the present embodiment will be described later.

  The electronic book data recording unit 153 records electronic book data acquired from the electronic book providing server device 30 in association with predetermined information such as an electronic book ID.

  In order to perform gradation display, the reference data recording unit 154 has a predetermined color difference such as a hue ring (216 colors) corresponding to a web-safe color used when displaying a correct color on any electronic display. Reference data having different color feature values is recorded. Note that the reference data is not limited to this, but is a color feature amount of lightness, saturation, hue, luminance, or color difference, and a predetermined gradation when displaying different gradations adjacent in gradation display. Reference data in which color feature quantities having differences are defined may be recorded.

  The operation unit 170 includes various confirmation buttons, operation buttons for inputting operation commands, a number of keys such as a numeric keypad, a touch sensor provided on the display unit 130, and the like, and is used when performing each operation. It is supposed to be. In particular, the operation unit 170 is used when performing scroll operation, page turning operation (page turning), and other operations when browsing text data. For example, the operation unit 170 of the present embodiment constitutes a receiving unit of the present invention.

  The application execution unit 180 is configured by an independent central processing unit (CPU), or is configured using the central processing unit (CPU) of the terminal management control unit 190 and is controlled by the terminal management control unit 190. The display assist process is executed by executing the reader application.

  Specifically, the application execution unit 180 acquires electronic book data by executing a reader application, and specifies a data acquisition management unit 181 that performs display management of the content, and a site of interest to be presented to the user. And a display data control unit 185 that generates a background image for performing gradation display and controls display of the background image on the display unit 130.

  For example, the display data control unit 185 of the present embodiment constitutes the display control unit of the present invention and the visual field information acquisition unit together with the display control unit 140.

  The data acquisition management unit 181 acquires electronic book data from the electronic book providing server device 30 based on an input operation on the operation unit 170 by the user in cooperation with the communication control unit 110 and stores the electronic book data in the electronic book data recording unit 153. Let me record.

  In addition, the data acquisition management unit 181 executes display control based on the user's operation, and displays the content on the display unit 130 based on the electronic book data, based on the operation of the operation unit 170. To manage the text to be displayed (text corresponding to the content) and necessary information.

  The site-of-interest specifying unit 183 displays the site of interest such as a menu button that can be touch-operated on the display unit 130 via, for example, a physical operation unit 170 such as a home button while browsing an electronic book. When instructed, the display position (coordinates on the display unit 130) of the site of interest displayed by the reader application or other application is specified.

  The display data control unit 185 uses, as a target part, a part that the user should pay attention to, such as a menu button, on the screen displayed on the display part 130 in accordance with the received input operation when the reader application or other application is executed. It is displayed on the display unit 130.

  In addition, the display data control unit 185 generates a background image in which the degree of the color feature amount is changed, that is, an image for performing gradation display, according to the distance from the identified region of interest, and interlocks with the display control unit 140. The generated background image is displayed on the display unit 130.

  In particular, the display data control unit 185 changes the degree of the color feature amount in accordance with the distance from the identified target portion with respect to at least one color feature amount of brightness, saturation, hue, luminance, and color difference. An image is generated, and the generated background image is displayed on the display unit 130.

  Then, the display data control unit 185 recognizes the difference by a person defined by, for example, a web-safe color that is used when displaying a color correctly on any electronic display while following the distance from the identified target region. A background image in which the degree of the color feature amount, that is, the gradation difference from the adjacent color feature amount due to the gradation is changed, is generated with a possible predetermined gradation difference.

  Further, when the color feature amount is at least one of lightness, saturation, and luminance, the display data control unit 185 increases the gradation value of the color feature amount according to the distance from the specified target portion. Alternatively, a background image in which the degree of the color feature amount is changed is generated by lowering. Then, the display data control unit 185 generates a background image in which the tone value of the color feature value of the target region is the highest or lower than the tone value of the color feature value of the other part.

  Note that, for example, the display data control unit 185 generates a background image in which the gradation value of the background of the region of interest is the brightest because the image is easily guided from a darker one to a brighter one as the point of interest. It is preferable to generate a background image in which the degree of the color feature amount is changed by increasing the tone value of the color feature amount while following the distance from the focused region.

  On the other hand, when the color feature amount is a hue or a color difference, the display data control unit 185 follows the distance from the identified target region and gradually changes the gradation value from one color to another as the color feature amount becomes closer to the target region. Is changed to generate a background image in which the degree of the color feature amount is changed. Then, the display data control unit 185 generates a background image in which the tone value of the target region is the tone value of one color or another color.

  For example, the display data control unit 185 uses one of RGB (red, green, and blue) as one color and other RGB colors other than those selected with the one color. Use any color. However, in the present embodiment, not only RGB colors but also RGB intermediate colors, CMY (cyan, magenta, yellow) or intermediate colors thereof may be used.

  Specifically, as shown in FIG. 4, when the display position (x1, y1) on the display unit 130 of the site of interest Z such as a menu button is specified, the display data control unit 185 specifies the specified menu button. The length (reference length) L from the menu button coordinates (x1, y1) to the farthest area end (x2, y2) of the display area is determined based on the display position of the display area 130 and the area size of the display area of the display unit 130. calculate.

  Then, the display data control unit 185 divides the reference length for each predetermined distance so as to obtain a background image in which the degree of the color feature amount is changed according to the identified distance L from the target region, and also references Based on the data, a color feature amount having a predetermined gradation difference is set for each of the divided regions with the coordinate (x1, y1) of the target region as the center and the divided length as the radius. Then, a background image having a gradation with a predetermined gradation difference between adjacent gradation values is generated (for example, a gradation image whose degree of color feature is changed from a black gradation value to a white gradation value). Generate a background image).

  Note that the display data control unit 185 may specify the length for dividing the reference length L based on the visual field information of the user. For example, the display data control unit 185 specifies the radius of the recognizable range (viewing circle) from the gaze point from the user's visual field information, and determines the radius based on the length of the radius or the length of the radius. The reference length L may be divided based on the length. In addition, in the change of the color feature amount due to gradation difference due to gradation, gradation can be recognized if at least the length of the radius can be secured. The “length” indicates a length shorter than the length of the radius.

  In this case, since a background image that realizes gradation display in which a recognizable gradation difference is always generated within the user's visual field range can be generated, the user's gaze point can be accurately placed on the target portion (menu button). Can be induced.

  On the other hand, the display data control unit 185 registers the pertinent visual field information of the user in the visual field information recording unit 152 in advance. For example, as described above, the display data control unit 185 cooperates with the display unit 130, the display control unit 140, and the operation unit 170, and uses coordinate range information that specifies the range of the visual field area designated by the user as visual field information. And recorded in the visual field information recording unit 152.

  For example, the display data control unit 185 displays the coordinates to be watched by a “x mark” or the like at a predetermined position of the display unit 130 before acquiring the electronic book data, and is visually recognized in a state where the position of the x is watched. The visual field information generated by tracing the region that can be created with a finger and setting the range as the visual field region is recorded in the visual field information recording unit 152.

  The terminal management control unit 190 is mainly composed of a central processing unit (CPU) and includes various input / output ports such as a key input port and a display control port, and generalizes the overall functions of the communication terminal device 10. To control.

[3] Display Assist Process Next, the operation of the display assist process executed in the communication terminal device 10 of the present embodiment will be described with reference to FIG. FIG. 5 is a flowchart showing the display assist process executed by the communication terminal device of this embodiment.

  In this operation, it is assumed that the reference data for performing gradation display and the visual field information of the user are already recorded in the data recording unit 150, and the reader application is already executed to browse a specific electronic book. It shall be.

  In this operation, a menu button that is superimposed and displayed on the browsing screen in accordance with a predetermined operation during browsing of the electronic book will be described as a focused part, and a gradation display in which the background image changes from black to white will be used. explain.

  First, when the display data control unit 185 detects a display operation of a menu button as a target part on the display unit 130 via the operation unit 170 (step S101), the target part specifying unit 183 specifies the menu button specified by the reader application. The display position (coordinates) on the display unit 130 is specified (step S102).

  Next, the display data control unit 185 determines from the menu button coordinates (display position) to the farthest region edge of the display region based on the specified display position of the menu button and the region size of the display region of the display unit 130. The length (reference length) is calculated (step S103).

  Next, the display data control unit 185 divides the reference length for each predetermined distance according to the specified distance from the target region, and based on the reference data, the center of the menu button coordinates, A color feature amount having a predetermined gradation difference is set for each divided area, and a background image having a gradation having a predetermined gradation difference is generated for adjacent gradation values (step S104).

  In particular, the display data control unit 185 changes the gradation value at which the color feature value becomes brighter as it gets closer to the target site while following the distance from the specified target site (from black to white). A background image in which the degree of the color feature amount is changed (by changing the tone value) is generated.

  Note that the display data control unit 185 may specify the length for dividing the reference length based on the user's visual field information. For example, the display data control unit 185 specifies the radius of the recognizable range (viewing circle) from the gaze point from the user's visual field information, and determines the radius based on the length of the radius or the length of the radius. The reference length may be divided based on the length.

  Next, the display data control unit 185 displays the displayed background image in a predetermined display area of the display unit 130 in conjunction with the display control unit 140 by using a pop-up display or a highlight display while displaying the menu button in step S104. The background image generated in step S105 is switched to (step S105).

  Next, when the display data control unit 185 detects an input (for example, touch input) to the menu button (step S106), the display data control unit 185 hides the display of the menu button and switches the background image to the original image (step S107). This operation is terminated.

  As described above, the communication terminal device 10 according to the present embodiment can display a background image in which the degree of the value of the color feature amount is increased as the distance from the region of interest that is an important screen display such as a menu button is increased. The gradation background image can be displayed on the display screen of the display means.

  Therefore, the communication terminal device 10 according to the present embodiment, for example, even if the user has a limited field of view, such as a visually impaired person, such as the color feature amount becomes brighter as the region of interest approaches. Since it can be guided to the site of interest according to the change in the degree of the color feature amount such as the bright direction or the dark color direction in the field of view, if a part of the screen can be visually recognized, the color feature amount According to the change in the degree, the position where the target region is displayed can be easily recognized, and the visibility of the user can be improved.

[4] Modification [4.1] Modification 1
In the above embodiment, the display assist process is executed when browsing the electronic book acquired from the electronic book providing server device 30. However, the display assist process is not limited to browsing the electronic book. The present invention can be applied to an apparatus using a display screen, such as a setting operation, an operation during web browsing, and an electronic mail browsing or operation.

[4.2] Modification 2
In the above embodiment, the background image in the case of using a single target region such as a menu button has been described. However, the display data control unit 185 guides the gaze point to two or more buttons and other target regions. A background image may be generated. In this case, for example, a different color feature amount is assigned to each button, and a background image having a gradation up to each button is generated based on the display area of the display unit 130.

  For example, if the button is the target part at the top right edge and left edge of the display area, set the right side to “red” and the left side to “blue”. Gradually from “red” to “blue” should be added from the left to the left edge.

  However, in the case of this configuration, it is necessary to present to the user which color is assigned to which button in advance by a manual or the like.

DESCRIPTION OF SYMBOLS 1 ... Electronic book provision system 10 ... Communication terminal device 30 ... Electronic book provision server apparatus 40 ... Electronic book database 110 ... Communication control part 130 ... Display part 140 ... Display control part 150 ... Recording part 151 ... Application recording part 152 ... Visual field information Recording unit 153 ... Electronic book data recording unit 154 ... Reference data recording unit 155 ... RAM
170 ... Operation unit 180 ... Application execution unit 181 ... Data acquisition management unit 183 ... Part of interest specifying unit 185 ... Display data control unit 170 ... Terminal management control unit

Claims (11)

Display means;
A receiving means for receiving a user input operation;
In response to the received input operation, a display control unit that causes the display unit to display a site to be noted by the user as a site of interest in the screen displayed on the display unit;
With
The display terminal device, wherein the display control unit causes the display unit to display a background image in which the degree of the color feature amount is changed in accordance with the distance from the identified region of interest. The display terminal device according to claim 1,
The display terminal device, wherein the color feature amount includes at least one of brightness, saturation, hue, luminance, and color difference. The display terminal device according to claim 2,
When the color feature amount includes at least one of lightness, saturation, and luminance,
The display control means changes the degree of the color feature amount by increasing or decreasing the gradation value of the color feature amount as it approaches the target portion while following the distance from the specified target portion. A display terminal device that displays the background image on the display means. The display terminal device according to claim 3,
The display terminal device, wherein the display control unit causes the display unit to display the background image whose tone value of the color feature amount of the target region is the highest or lower than the tone value of the color feature amount of the other part. In the display terminal device according to claim 3 or 4,
A display terminal device, wherein the display control means causes the display means to display the background image that brightens the gradation value of the color feature amount as it approaches the region of interest. The display terminal device according to claim 2,
When the color feature amount is a hue or a color difference,
The display control means changes the gradation value from one color to another color as it gets closer to the target site while following the distance from the specified target site, thereby reducing the degree of the color feature amount. A display terminal device for displaying the changed background image on the display means. The display terminal device according to claim 6,
The display terminal device, wherein the display control means causes the display means to display the background image in which the gradation value of the region of interest is the gradation value of the one color or the other color. In the display terminal device according to any one of claims 1 to 7,
It further has visual field information acquisition means for acquiring visual field information indicating the visual field area of the user,
The background in which the display control means has a recognizable gradation difference in the color feature amount in the visual field region, and the degree of the color feature amount is changed according to the distance from the identified region of interest. A display terminal device for displaying an image on the display means. In the display terminal device according to any one of claims 1 to 8,
The display terminal device, wherein the display control means causes the display means to display the background image in which the degree of the color feature amount changes with a predetermined gradation difference while following the distance from the identified region of interest. Computer
Accepting means for accepting user input operation; and
In accordance with the received input operation, a display control unit that causes the display unit to display a portion that should be focused on by the user as a focused portion in the screen displayed on the display unit.
Function as
A program that causes the display means to display a background image in which the degree of the color feature amount is changed in accordance with the distance from the identified region of interest. Receiving a user input operation;
In response to the received input operation, in the screen displayed on the display unit, displaying the part that the user should focus on as the target part on the display unit;
Including
A display method characterized by causing the display means to display a background image in which the degree of the color feature amount is changed according to the identified distance from the region of interest.