JP2007101872A - Image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To permit a user to check images as required while arranging the image of the most interest by the user at the central part and displaying sub screens right and left by adopting a display form for displaying an added image at the central part and the already displayed image to be divided right and left into two at the sides. <P>SOLUTION: The image display device 020 displays the added image 0202 on a display in addition to the already displayed image displayed on an image displayable region, on the basis of home position information defining the position with respect to the horizontal axis of the image displayable region of the display. The image already displayed on the image displayable region is resized by dividing right and left into two on the basis of the home position information and can be displayed at the right and left of the added image. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image display device.

In order to display a plurality of videos at the same time on a display screen, an image display apparatus has already been proposed in which each video signal is reduced / expanded and displayed by superimposing all or part thereof (for example, see Patent Document 1) ).
Japanese Patent Laid-Open No. 11-259057

  However, the ease of viewing by the user is not taken into consideration, and an image that is difficult to view may occur depending on how it is superimposed or depending on the position where the user views.

  In view of such circumstances, the present invention further adds an additional image to the display in addition to the image displayed in the image displayable area, based on home position information that determines the position in the horizontal axis of the image displayable area of the display. The present invention proposes an image display device characterized by display. At this time, the image already displayed in the image displayable area can be divided into left and right parts and resized based on the home position information, and displayed on the left and right of the additional image.

  As described above, the display image device according to any one or two or more of the present inventions takes a display form in which the additional image is displayed at the center and the existing display image is displayed by dividing it into the left and right sides. Therefore, it is possible to check at any time by displaying the sub screen on the left and right while arranging the image that the user is most interested in in the center.

  The best mode for carrying out each invention will be described below. Note that the present invention is not limited to these embodiments, and can be implemented in various modes without departing from the spirit of the present invention.

  The first embodiment will mainly describe claims 1, 2, 6, 7, 9, 10, and the like. The second embodiment will mainly describe claims 3 and 4. The third embodiment will mainly describe claim 5 and the like. In the fourth embodiment, claim 8 will be mainly described.

  << Embodiment 1 >>

  <Embodiment 1: Overview> Embodiment 1 will be described. In the present embodiment, an additional image is displayed on the display in addition to the image displayed in the image displayable area based on home position information that determines the position in the horizontal axis of the image displayable area of the display. This is an image display device having features.

  FIG. 1 shows an example of an image display apparatus according to the present embodiment. It is assumed that the video content of the bus has already been displayed on the image display device. The video content of the soccer broadcast is added and displayed as an additional image here. For example, additional display can be realized by a user's operation. The position where the additional image is arranged is determined based on the home position information. Here, it is assumed that the center coordinate (XXX, 0) of the horizontal axis of the image displayable area is the home position information, and this shows the scene in which the additional image is displayed using this as the left-right center position of the additional image. At this time, an example is shown in which an image already displayed in the image displayable area is divided into two parts on the left and right sides based on the home position information, and is resized and displayed on the left and right of the additional image.

  <Embodiment 1: Configuration> FIG. 2 shows an example of functional blocks in the present embodiment. The “image display device” (0202) of the present embodiment illustrated in FIG. 2 includes a “holding unit” (0201), an “additional image information acquisition unit” (0202), and an “additional image display unit” (0203). The additional image display unit (0203) may further include a “center display unit” (0204).

  The “holding unit” (0201) holds home position information. “Home position information” refers to information for determining the position in the horizontal axis of the image displayable area of the display, and corresponds to information indicating coordinates. The home position information is assumed to be the approximate center coordinates on the horizontal axis of the normal image displayable area, but may be other positions. The home position information can be arbitrarily set and held by the user (detailed in the third embodiment). Alternatively, according to the channel, for example, the weather forecast channel may be determined so that the right side of the screen is the home position and is displayed at the right end. It is assumed that the home position information is held in an HDD or the like.

  Further, the home position information held in the holding unit may be the only value that does not depend on the additional image information. That is, in the personal computer software, position information displayed for each application is held, whereas in the present invention, position information is not held for each additional image information. Therefore, unlike a form in which the position displayed by an application is determined as in personal computer software, the additional image and the position where this is displayed are independent.

  The “additional image information acquisition unit” (0202) acquires additional image information. “Additional image information” refers to information for configuring an additional image to be displayed in addition to the image displayed in the image displayable area. The additional image information may be identification information of a content signal for specifying the additional image. In this case, information for configuring the additional image can be acquired based on the identification information. The additional image does not prevent the content from being the same as an image that has already been displayed (hereinafter referred to as an already displayed image). Additional image information can be acquired by receiving content distributed from a broadcasting station or an external server device, or by receiving data generated by the device itself or a device connected via I / O. .

  The “additional image display unit” (0203) performs processing for determining the horizontal axis arrangement position of the additional image based on the home position information and displaying the additional image based on the additional image information on the display. After the display, the already displayed image and the additional image are displayed at the same time. “Determining the horizontal axis arrangement position of the additional image based on the home position information” corresponds to arranging the additional image at a position specified by the home position information. When arranging the additional image, for example, a reference position such as the left end (or right end) of the additional image is determined, and this position is matched with the position specified by the home position information. Specifically, when the home position information is 100 pixels, adjustment is performed so that the left end of the additional image is displayed at that position.

  Further, when the additional image display unit has “center display means” (0204), the position serving as a reference when the additional image is arranged is set as the left and right central position of the additional image. That is, the center display means performs processing for displaying the additional image based on the home position information, with the position on the horizontal axis of the image displayable area as the left-right center position of the additional image. Specifically, when the home position information is 512 pixels, adjustment is performed so that the center of the additional image is displayed at that position.

  FIG. 3 shows another example of the display form of the additional image. In any case, the home position information is assumed to be the center coordinates on the horizontal axis of the image displayable area. In (a), the scene where an additional image is displayed superimposed on the already displayed image is shown. Further, (b) shows a scene in which the already displayed image is moved so as to avoid the additional image displayed based on the home position information.

  The additional image may be configured to be added by a dedicated operation. In addition, display processing may be executed accompanying other operations. For example, when the user switches channels, the content of the new channel is displayed as an additional image, the displayed image moves to both sides of the additional image, and the display of the images displayed on both sides disappears.

  “Image display device” (0200) includes a wide range of devices having a display capable of displaying an image (liquid crystal display, plasma display, EL display, cold cathode matrix display, etc.). In addition, the vertical / horizontal ratio of the image displayable area is assumed to be a value smaller than 3/8. Thereby, even if it is a case where an already displayed image and an additional image are displayed simultaneously, the situation where both images are unnaturally compressed can be avoided. Further, when the image displayable area has a vertical / horizontal ratio smaller than 3/8 and the image display device itself becomes wide in the horizontal direction, the user can see the central portion of the image display device as shown in FIG. In this case, the home position information can be set to an appropriate position, and the display position of the additional image can be adjusted.

  Embodiment 1 Specific Example FIG. 5 is a schematic diagram illustrating an example of a hardware configuration of an image display apparatus according to Embodiment 1. The operation of each hardware component in the additional image display process will be described with reference to FIG. As shown in this figure, the image display device includes “CPU (central processing unit)” (0501), “main memory” (0502), and “graphic memory” (0503) which are additional image display units. ing. Also, a “storage device (or storage medium)” (0504) as a holding unit, a “reception tuner” (0505) as an additional image information acquisition unit, and an “interface” (0506) are provided. These are connected to each other via a data communication path such as a “system bus” (0507), and perform transmission / reception and processing of information.

  Here, the storage device stores various programs executed by the CPU, home position information, and the like. In addition, the main memory provides a work area which is also a work area of the program at the same time as being read in order to execute the program stored in the storage device. Furthermore, a plurality of memory addresses are assigned to the main memory and the storage device, respectively, and programs executed by the CPU exchange and process data by specifying and accessing the memory addresses. Is possible.

  The reception tuner has a function of storing the received additional image information data in a storage device, a temporary storage memory for the reception tuner, or the like. The interface has a function of transmitting information constituting an already displayed image to the main memory and a function of transmitting image data from the main memory to the graphic memory.

  When an additional image display command is acquired by the interface, the additional image information Y is held in the main memory (1) via the reception tuner or the like, and further, the additional image development stored in the address β of the storage device The program P is expanded on the work area (3) of the main memory. At this time, first, the additional image expansion program P sends out an instruction “obtain information on address α of the storage device and store it at address 2 of the main memory”. In accordance with this instruction, the home position information H stored at the address α is read from the storage device and stored in the memory address 2 of the main memory.

  Subsequently, according to the instruction of the additional image development program “determine the horizontal axis arrangement position of the additional image based on the information of the address 2 of the main memory and store it in the graphic memory”, the CPU sets the additional image arrangement position. Arithmetic processing for determination is performed. When the arrangement position of the additional image is determined, image data is calculated for each pixel of the graphic memory from the acquired additional image information Y and the already-displayed image information X held in the main memory, and stored in the graphic memory. This data is output to the display via the interface.

  <First Embodiment: Process Flow> FIG. 6 shows a flow of a process of displaying an additional image in addition to the image displayed in the image displayable area in the image display device of the first embodiment. . First, the horizontal axis arrangement position of the additional image is determined based on home position information that determines the position in the horizontal axis of the image displayable area of the display (horizontal axis arrangement position determination step S0601). At this time, the home position information held in the memory or the like is read, and the position specified by this is determined as the position where the additional image is arranged. Next, additional image information is acquired (additional image information acquisition step S0602). At this time, the additional image information receives content distributed from a broadcasting station or an external server device, or receives data generated by the device itself or a device connected via I / O. Can be obtained by Finally, a process for additionally displaying an additional image based on the additional image information at the arrangement position of the display is performed (additional image display step S0603).

  The above processing can be executed by a program for causing a computer to execute, and the program can be recorded on a recording medium readable by the computer. (The same applies throughout the specification.)

  <Embodiment 1: Effect> In the present embodiment, an additional image is added in addition to the image displayed in the image displayable area based on home position information that determines the position in the horizontal axis of the image displayable area of the display. It is an image display apparatus characterized by displaying on a display. Since the position for displaying the additional image can be freely determined by the home position information, it is possible to sufficiently consider the ease of viewing by the user.

  << Embodiment 2 >>

  <Embodiment 2: Overview> Embodiment 2 will be described. In the present embodiment, when it is determined that the additional image display is performed, the image already displayed in the image displayable area is resized by dividing it into left and right parts based on the home position information. It is an image display apparatus characterized by displaying on the left and right.

  <Embodiment 2: Configuration 1> FIG. 7 shows an example of functional blocks in the present embodiment. The “image display device” (0700) of the present embodiment illustrated in FIG. 7 includes a “holding unit” (0701), an “additional image information acquisition unit” (0702), an “additional image display unit” (0703), Furthermore, it may include a “divided display portion” (0705), and the additional image display portion (0703) may include “center display means” (0704). Here, it is characterized by having a “divided display portion” (0705).

  The “divided display unit” (0705) determines whether additional image display is performed. If the result is a determination result that additional image display is performed, an image already displayed in the image displayable area is displayed as the home display. Based on the position information, it is split into left and right parts and resized, and displayed on the left and right sides of the additional image. When a user performs a display execution operation for an additional image, or when a display process is performed in association with an operation such as channel switching, an additional image display is performed. It can be judged. If it is determined that the additional image display is performed, the image already displayed in the image displayable area is resized by dividing it into left and right at the position specified by the home position information. In other words, the already displayed image is displayed separately on the left and right sides of the additional image. As a result, not only the additional image but also the entire displayed image is displayed.

  FIG. 8 shows an example in which an additional image is displayed according to home position information. (A) shows an example in which, when the center of the horizontal axis of the screen display area is specified by the home position information, the already displayed screen is displayed in an unevenly divided manner because it is arranged on the left side. Although the screen display area remains equally beside the additional image, the displayed image on the right side has a higher compression rate than the left side. In (b), when the center of the horizontal axis of the additional image is specified by the home position information, the existing display screen is equally divided into left and right parts and displayed in the screen display area that remains unevenly beside the additional image. An example was given. Since the screen display area remains unevenly on the side of the additional image, the displayed image to be displayed is an image that is equally divided into two. However, the displayed image on the right side has a higher compression rate than the left side.

  The processing of each other part is the same as in the first embodiment.

  <Embodiment 2: Configuration 2> FIG. 9 shows an example of functional blocks in the present embodiment. The “image display device” (0900) of this embodiment shown in FIG. 9 includes a “holding unit” (0901), an “additional image information acquisition unit” (0902), an “additional image display unit” (0903), The divided display unit (0905) further includes a “resize dividing unit” (0906), and the additional image display unit (0903) includes a “center display unit” (0904). And “curtain display means” (0907).

  The “resize dividing unit” (0906) gradually resizes and displays the already displayed image from the left and right center positions acquired by the center display unit (0904) while pushing it left and right. By resizing, the displayed image is compressed, and the entire image is reduced and displayed.

  The “curtain display unit” (0907) displays an additional image in an area that gradually expands from the left and right center position by the resize dividing unit (0906). 10 and 11 schematically show a dynamic process in which an additional image is displayed. FIG. 10 shows a scene where the compressed additional image is displayed while being gradually expanded, and FIG. 11 shows a scene where the display range gradually widens and finally all the images are displayed.

  The processing of each other part is the same as in the first embodiment.

  Second Embodiment: Specific Example FIG. 12 is a schematic diagram illustrating an example of a hardware configuration in an image display apparatus according to a second embodiment. The operation of each hardware component in the additional image display process will be described with reference to FIG. As shown in this figure, the image display device includes “CPU (central processing unit)” (1201), “main memory” (1202), and “graphic memory” (1203) as additional image display units. ing. Further, a “storage device (or storage medium)” (1204) as a holding unit, a “reception tuner” (1205) as an additional image information acquisition unit, and an “interface” (1206) are also provided. These are connected to each other by a data communication path such as a “system bus” (1207), and perform transmission / reception and processing of information.

  In the present embodiment, processing in the divided display unit is executed by a “CPU (central processing unit)” (1201), a “main memory” (1202), and a “graphic memory” (1203). First, the divided display program P2 stored at the address β of the storage device is expanded on the work area (3) of the main memory. At this time, first, the divided display program P2 sends an instruction “obtain information on the address α of the storage device and store it in the address 2 of the main memory”. In accordance with this instruction, the home position information H stored at the address α is read from the storage device and stored in the memory address 2 of the main memory. Based on the home position information H, the CPU divides the displayed image constituted by the displayed image information X into left and right (X1, X2). Next, the CPU calculates the left and right image display areas that remain after the additional image is displayed, and calculates the compression rate of each of the displayed images divided into two according to this. Based on the compression ratio obtained at this time, in order to resize the displayed image and display it on the left and right of the additional image, image data is calculated for each pixel of the graphic memory and stored in the graphic memory. This data is output to the display via the interface.

  Further, a case of a display form in which an already-displayed image is gradually resized while being pushed left and right and an additional image is displayed in an area gradually expanding from the center position in the right and left will be described below. First, based on the home position information H, the CPU divides the displayed image constituted by the displayed image information X into left and right parts, and then removes arbitrary pixels (n pixels) to the left and right in the divided cross-sectional portion. The displayed screen is compressed left and right by n pixels. The region generated at this time is supplemented with n × 2 pixels from the additional image information. Replenishment may be obtained from the center of the horizontal axis of the additional image toward both ends (example shown in FIG. 11), or a pixel value when the additional image is compressed to n × 2 pixels may be acquired ( Example shown in FIG.

  As a next step, arbitrary pixels (n pixels) are removed left and right in a portion adjacent to the additional image, and the existing display screen is further compressed left and right by n pixels. The region generated at this time is supplemented with n × 2 pixels from the additional image information. As described above, the replenishment may be acquired from the adjacent portion of the additional image on the horizontal axis toward both ends, or the pixel value may be acquired when the additional image is compressed to n × 4 pixels. This is repeated until the entire additional image is displayed.

  If the pixel values of the displayed image and the additional image can be calculated, they are combined as needed and stored in the graphic memory, and the displayed image is gradually resized while being pushed left and right. From this, it is possible to realize a display form in which an additional image is displayed in an area gradually expanding from

  <Second Embodiment: Process Flow> FIG. 13 shows a flow of a process of displaying an additional image in addition to the image displayed in the image displayable area in the image display device of the second embodiment. . First, it is determined whether additional image display is performed (determination step S01301). This is because the additional image display is performed when the display execution operation of the additional image is performed by the user, or when the display processing is performed accompanying the operation such as channel switching. Judge that it will be done. In the determination step (S1301), if it is a determination result that the additional image display is performed, the already-displayed image information that is the information constituting the image already displayed in the image displayable area is displayed on the display. 2n pixels are removed from the position specified by the home position information that determines the position in the horizontal axis of the possible area, and the remaining displayed image information is compressed and held (displayed image compression step S1302). At this time, n means an arbitrary number, for example, 1 is given as an initial value. If it is determined in the determination step (S1301) that the additional image display is not performed, the process ends.

  Next, 2n pixels of additional image information are acquired (additional image information acquisition step S1303). At this time, the additional image information receives content distributed from a broadcasting station or an external server device, or receives data generated by the device itself or a device connected via I / O. Can be obtained by The additional image information for 2n pixels to be acquired may be data obtained by compressing the additional image to 2n pixels, or may be data acquired for 2n pixels from the position specified by the home position information.

  Next, the already displayed image constituted by the already displayed image information compressed and held and the additional image constituted by the acquired additional image information are synthesized and held as synthesized image information (synthesized image generation step). S1304). Further, a composite image composed of the composite image information is displayed on the display (display step S1305).

  Finally, it is determined whether 2n is the maximum number of pixels of the additional image (pixel determination step S1306). If the maximum number of pixels has been reached, it can be determined that all the additional images are displayed, and the process ends. On the other hand, if 2n has not yet reached the maximum number of pixels, the additional image is being displayed, so n is incremented and the process returns to the already displayed image compression step (S1302). As described above, by repeating S1302 to S1305, an additional image is displayed so as to open the curtain in an area that gradually expands from the left and right center positions while gradually resizing the displayed image while pushing it to the left and right. become.

  <Embodiment 2: Effect> In the present embodiment, when it is determined that an additional image is displayed, an image already displayed in the image displayable area is divided into left and right parts based on the home position information. Then, the image display device is characterized in that it is resized and displayed on the left and right of the additional image. When a user views at a position relatively close to the display, it is often difficult to view in a display form in which main and sub images are displayed on the left and right, which are normally seen. However, if the display mode is such that the additional image is displayed in the central part and the displayed image is displayed by dividing it into the left and right sides as in the present embodiment, the image most noticed by the user is arranged in the central part. However, it can be said that it is easy to check from time to time by displaying sub-screens on the left and right. For example, when a personal computer screen is displayed as an additional image arranged in the center, the user can check the left and right sub-screens at any time while operating the personal computer.

  << Embodiment 3 >>

  <Embodiment 3: Overview> Embodiment 3 will be described. This is an image display device characterized by managing home position information.

  <Embodiment 3: Configuration> FIG. 14 shows an example of functional blocks in the present embodiment. The “image display device” (1400) of the present embodiment shown in FIG. 14 includes a “holding unit” (1401), an “additional image information acquisition unit” (1402), an “additional image display unit” (1403), Furthermore, it has a “management unit” (1404). This is a functional block diagram based on the first embodiment, but other configuration requirements may be required when other embodiments are used as a basis.

  The “management unit” (1404) performs processing for managing home position information held in the holding unit (1401). The management of home position information corresponds to addition, deletion, change, etc. of home position information. When the user can add home position information, the position for displaying the additional image can be arbitrarily determined.

  Third Embodiment: Specific Example FIG. 15 is a schematic diagram illustrating an example of a hardware configuration in an image display apparatus according to a third embodiment. The operation of each hardware component in the additional image display process will be described with reference to FIG. As shown in this figure, the image display device includes “CPU (central processing unit)” (1501), “main memory” (1502), and “graphic memory” (1503) as additional image display units. ing. Further, a “storage device (or storage medium)” (1504) as a holding unit, a “reception tuner” (1505) as an additional image information acquisition unit, and an “interface” (1506) are also provided. These are connected to each other via a data communication path such as a “system bus” (1507), and perform transmission / reception and processing of information.

  In the present embodiment, processing in the management unit is executed by a “CPU (central processing unit)” (1501) and a “main memory” (1502). First, the management program P3 stored at the address β of the storage device is expanded on the work area (3) of the main memory. At this time, first, the management program P3 sends an instruction “obtain information on the address α of the storage device and store it in the address 2 of the main memory”. In accordance with this instruction, the home position information H stored at the address α is read from the storage device and stored in the memory address 2 of the main memory. The user can add, delete, and change home position information H by operating the image display device. Subsequently, in the management program P3, an instruction “store the information of the address 2 of the main memory at the address α of the storage device” is executed. After addition, deletion, change or the like is added to the home position information H held in the main memory, the home position information H is stored at the address α of the storage device via the interface.

  <Embodiment 3: Effect> This embodiment is an image display device characterized by managing home position information. Since the user can add home position information and the like, an image can be appropriately arranged at a position where the user can most easily view it, which is highly convenient.

  << Embodiment 4 >>

  <Embodiment 4: Overview> Embodiment 4 will be described. This is an image display device characterized by holding a plurality of pieces of home position information in association with a user ID.

  <Embodiment 4: Configuration> FIG. 16 shows an example of functional blocks in the present embodiment. The “image display device” (1600) of this embodiment shown in FIG. 16 includes a “holding unit” (1601), an “additional image information acquisition unit” (1602), an “additional image display unit” (1603), Furthermore, it has a “user ID holding unit” (1604), and the holding unit (1601) has “multiple holding means” (1605). This is a functional block diagram based on the first embodiment, but other configuration requirements may be required when other embodiments are used as a basis.

  The “user ID holding unit” (1604) holds a user ID. The user ID is identification information for identifying a user, and uniquely identifies each user.

  The “multiple holding means” (1605) holds a plurality of home position information in association with the user ID. Since the home position information is associated with each user, the main screen arrangement position can be determined according to the viewing position of the user and the work state. It is assumed that the user inputs a user ID at the time of viewing or displaying an additional image so that the additional image is displayed at a position optimum for the user.

  <Embodiment 4: Effect> This embodiment is an image display device characterized by holding a plurality of pieces of home position information in association with a user ID. Since it becomes possible for each user to arrange an additional image at a position optimum for the user, the convenience is further enhanced.

Conceptual diagram for explaining the first embodiment Functional block diagram for explaining the first embodiment The figure which shows the example of the display form of an additional image in Embodiment 1. The figure which shows the scene in which the home position information exists in the position which deviated from the center in Embodiment 1. Schematic showing an example of the hardware configuration of the first embodiment The figure which showed the flow of the process of Embodiment 1. Functional block diagram for explaining Configuration 1 of Embodiment 2 The figure which shows the example which displays an additional image according to home position information in Embodiment 2. Functional block diagram for explaining Configuration 2 of Embodiment 2 The figure for demonstrating the curtain display in Embodiment 2 (the 1) The figure for demonstrating the curtain display in Embodiment 2 (the 2) Schematic showing an example of the hardware configuration of the second embodiment The figure which showed the flow of the process of Embodiment 2. Functional block diagram for explaining the third embodiment Schematic showing an example of the hardware configuration of the third embodiment Functional block diagram for explaining the third embodiment

Explanation of symbols

0200 Image display device 0201 Holding unit 0202 Additional image information acquisition unit 0203 Additional image display unit 0204 Center display means

Claims (10)

An image display device capable of displaying an additional image in addition to the image displayed in the image displayable area,
Display,
A holding unit that holds home position information that determines the position in the horizontal axis of the image displayable area of the display;
An additional image information acquisition unit for acquiring additional image information;
An additional image display unit for determining a horizontal axis arrangement position of the additional image based on the home position information and displaying the additional image based on the additional image information on a display;
An image display apparatus.   2. The image display according to claim 1, wherein the additional image display unit includes center display means for displaying the additional image with the position in the horizontal axis of the image displayable area based on the home position information as the horizontal center position of the additional image. apparatus.   It is determined whether additional image display is performed. If the result is that additional image display is performed, the image already displayed in the image displayable area is divided into left and right parts based on the home position information. The image display device according to claim 1, further comprising a divided display unit that resizes and displays the left and right sides of the additional image. The split display section is
Resize dividing means for gradually resizing while pushing the image already displayed left and right from the left and right center position acquired by the center display means;
The additional image display unit includes:
4. The image device according to claim 2, further comprising a curtain display unit that displays an additional image in a region that gradually expands from a left-right center position by the resizing division unit.   The image display device according to claim 1, further comprising a management unit for managing home position information held in the holding unit.   6. The image display device according to claim 1, wherein the home position information held in the holding unit is a unique value that does not depend on additional image information.   7. The image display device according to claim 1, wherein the home position information held in the holding unit is a substantially center coordinate on the horizontal axis of the image displayable area. A user ID holding unit for holding a user ID;
The image display device according to claim 1, wherein the holding unit includes a plurality of holding units that hold a plurality of home position information in association with a user ID.   The image display device according to claim 1, wherein a ratio of vertical / horizontal of the image displayable area is a value smaller than 3/8. An additional image display method in an image display device capable of displaying an additional image in addition to the image displayed in the image displayable area,
A horizontal axis arrangement position determining step for determining a horizontal axis arrangement position of the additional image based on home position information for determining a position in the horizontal axis of the image displayable area of the display;
An additional image information acquisition step of acquiring additional image information;
An additional image display step for performing processing for displaying an additional image on the display based on the additional image information;
An additional image display method.

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