JP5133318B2 - Display control device, display control method, display control system, display control program, and recording medium - Google Patents

Description

  The present invention relates to a display control apparatus, a display control method, a display control system, a display control program, and a recording medium for performing display control of an electronic device such as a touch panel having a function of detecting an input operation on an operation key displayed on a display screen. About.

  In recent years, with the development of presentation software, opportunities to display presentation materials on screens and various display devices at conferences, research groups, academic conferences, presentations, and other presentations are increasing.

  In such presentation software, it is possible to present slides of presentation materials in sequence, and to perform various operations such as an operation for entering annotations on the slide and an operation for enlarging or reducing a part of the slide. ing.

  For example, in the following Patent Document 1, in a display device having a function of detecting a touch position on a screen, a key for input operation is displayed on the screen, and a process corresponding to the displayed key is touched. A technique for executing (for example, selecting a drawing type to be erased) is disclosed.

JP 2003-196671 A (published July 11, 2003)

  Here, when an image is displayed on a display device for presentation or the like, the display device may be moved by a caster or the like so that each participant can easily see the screen, or the display device may be lifted up and raised. is there. Further, in recent years, the screen of the display device has become larger, and accordingly, the presenter may give a presentation while moving, explaining on the right side of the display device or on the left side.

  When the position of the display device or the position of the presenter changes in this way, the arrangement of keys for input operations that are easy for the presenter to use changes accordingly.

  However, in Patent Document 1, this point is not taken into consideration at all, and the key for input operation is always displayed at the top of the screen. For this reason, when the display device is lifted high, it becomes difficult for the presenter to touch the key. Further, when the display device is moved near the wall, it becomes difficult for the presenter to touch a key displayed closer to the wall among the keys for input operation.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a display control device, a display control method, and display control that display operation keys at easy-to-use positions according to the situation around the display screen. To realize a system, a display control program, and a recording medium.

  In order to solve the above problems, the display control device of the present invention detects an input operation performed on the display screen for an operation key displayed on the display screen and associated with a predetermined process. A display control device for displaying the operation keys on a display / input device, the position acquisition means for acquiring position information indicating a position of a detection target existing around the display screen with respect to the display screen, and the position Display position determining means for displaying the operation key at a position determined in advance according to the position of the detection target with respect to the display screen using the position information acquired by the acquisition means is characterized.

  In addition, in order to solve the above problems, the display control method of the present invention detects an input operation performed on the display screen with respect to an operation key displayed on the display screen and associated with a predetermined process. A display control method for a display control device for displaying the operation key on a display / input device for acquiring position information indicating a position of a detection target existing around the display screen with respect to the display screen And a display position determination step for displaying the operation key at a position determined in advance according to the position of the detection target with respect to the display screen, using the position information acquired in the position acquisition step. It is said.

  According to said structure, the position of the detection target with respect to a display screen is acquired, and an operation key is displayed on the position according to the acquired position. Therefore, the operation keys can be displayed at easy-to-use positions according to the situation around the display screen.

  Further, the position acquisition means acquires, as the position information, an output from a detection device that is provided in the display / input device and detects a distance from a detection target toward the right or left side of the display screen. When the distance to the detection target indicated by the position information is equal to or less than a predetermined lower limit value, the display position determining means is the end of the display screen opposite to the side where the distance is equal to or less than the lower limit value. It is preferable to display the above operation keys.

  According to the above configuration, when the distance between the detection target located on the side of the display screen and the display screen is close to a certain distance, the operation key is placed on the end opposite to the adjacent side. indicate. As a result, the user is prevented from being prevented from operating the operation key by the detection target.

  The detection target in this case is, for example, a wall, and the detection device may be a distance sensor using, for example, infrared rays or ultrasonic waves. The detection device may be, for example, a rotary encoder that detects the amount of horizontal movement of the display / input device.

  The “edge” for displaying the operation key may be a position where the image displayed on the display screen is not significantly obstructed when the user operates the operation key, and the operation key touches the outer edge of the display screen. Such a position may be used, or a position closer to the center from the outer edge may be used.

  The position acquisition means acquires information indicating the height of the display screen from the floor as the position information from a detection device provided in the display / input device, and the display position determination means When the height from the floor of the display screen indicated by the information is equal to or greater than a predetermined lower limit value, it is preferable to display the operation key at the lower end of the display screen.

  According to the above configuration, the operation key is displayed at the lower end portion of the display screen when the display screen is at a certain height above the floor. Thereby, even when the display screen is at a high position, the user can easily reach the operation keys.

  In this case, the detection target is a floor, and the detection device may be a distance sensor using, for example, infrared rays or ultrasonic waves. The detection device may be, for example, a rotary encoder that detects the amount of vertical movement of the display / input device.

  In addition, the “lower end” for displaying the operation key may be a position where the image displayed on the display screen is not significantly obstructed when the user operates the operation key. It may be a position that touches or may be a position closer to the center from the lower outer edge.

  Further, the position acquisition unit acquires, as the position information, information indicating which position on the display screen a user performing an input operation to the operation key is close to, and the display position determination unit includes It is preferable to display the operation key at a position where the user indicated by the position information is close or near the position.

  According to said structure, since an operation key is displayed on the position where the user adjoins, the operativity at the time of inputting while moving can be improved significantly. The “neighborhood” indicates a range in which the user can operate the operation keys from the position indicated by the position information. For example, when the position information indicates the vicinity of the left end of the display screen, the operation key may be a position that touches the outer edge on the left side of the display screen, or a user located near the left end of the display screen. The position may be close to the center so that can be operated.

  The display control system including the display control device and the display / input device has the same effects as the display control device.

  The display control device may be realized by a computer. In this case, a display control program for causing the display control device to be realized by the computer by causing the computer to operate as each of the means, and the program are recorded. Computer-readable recording media are also within the scope of the present invention.

  As described above, the display control device of the present invention includes a position acquisition unit that acquires position information indicating the position of a detection target that exists around the display screen, and the position information acquired by the position acquisition unit. And display position determining means for displaying the operation key at a position determined in advance according to the position of the detection target with respect to the display screen.

  Further, the display control method of the present invention uses a position acquisition step for acquiring position information indicating the position of a detection target existing around the display screen, and the position information acquired in the position acquisition step. And a display position determining step for displaying the operation key at a predetermined position according to the position of the detection target with respect to the display screen.

  Therefore, there is an effect that the operation key can be displayed at an easy-to-use position according to the situation around the display screen.

1, showing an embodiment of the present invention, is a block diagram showing a main configuration of a display control system. FIG. It is a figure which shows an example of the external appearance of the said display control system. It is a figure which shows an example of operation | movement of the said display control system when a display unit is moved. It is a figure explaining the operation key group described in FIG. It is a flowchart which shows the flow of the process performed by the display control unit contained in the said display control system. It is a block diagram which shows the principal part structure of the display control system concerning other embodiment of this invention. It is a figure which shows an example of the external appearance of the said display control system. It is a figure which shows an example of operation | movement of the said display control system. It is a flowchart which shows the flow of the process performed by the display control unit contained in the said display control control system.

Embodiment 1
An embodiment of the present invention will be described below with reference to FIGS.

〔System configuration〕
First, a basic configuration of the display control system 1 of the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a block diagram illustrating a main configuration of the display control system 1, and FIG. 2 is a diagram illustrating an example of an appearance of the display control system 1.

  As shown in FIGS. 1 and 2, a display control system (display control system) 1 according to this embodiment includes a display unit 10 and a control unit (display control device) 60. The main feature of the display control system 1 is that the display position of the operation key is automatically changed to a position that can be easily used by the user of the display unit 10 under the control of the control unit 60.

  The display unit 10 includes a display unit (display / input device) 12 and includes three display position sensors (detection devices) 32B, 32R, and 32L.

  The display unit 12 has a function as a display device that displays an image and a function as an input device that receives a user input operation on the display screen. The display unit 12 displays an image according to the control of the display control circuit 66 of the control unit 60. In addition, the display unit 12 transmits the received input operation to the control unit 60 as operation data.

  As the display unit 12, for example, a general touch panel can be applied. In addition, for example, a liquid crystal display panel with a built-in optical sensor that detects an input operation of a user by an image can be applied. Of course, the display unit is not limited to these examples as long as it has a function as a display device and a function as an input device.

  The display position sensors 32B, 32R, and 32L are sensors that detect the position (the distance between the object and the display screen) of an object existing around the display unit 10 with respect to the display screen. Specifically, the display position sensors 32B, 32R, and 32L are respectively distanced from an object (such as a floor) present on the lower side toward the display unit 12 and an object (wall) present on the right side toward the display unit 12. And the distance to the object existing on the left side toward the display unit 12. The distances detected by the display position sensors 32B, 32R, and 32L are input to the control unit 60.

  Here, it is assumed that the display position sensors 32B, 32R, and 32L are ultrasonic distance sensors that detect distances to walls, floors, and the like by ultrasonic waves. However, the display position sensors 32 </ b> B, 32 </ b> R, and 32 </ b> L are not limited to this example as long as they are capable of detecting the position of the object (distance from the object) around the display unit 10.

  For example, an infrared distance sensor can be applied. For example, when the position of the display unit 10 is moved by a motor (servo motor or the like), the number of rotations of the motor may be acquired to obtain the distance between the display unit 10 and the floor, wall, or the like. Furthermore, for example, the position change amount of the display unit 10 may be acquired using a rotary encoder or the like, and the distance between the display unit 10 and the floor, wall, or the like may be obtained from the acquired position change amount.

  Here, the display position sensor 32B is arranged so that the distance detection direction is downward so that the distance to the floor is detected, but the distance is so detected that the distance to the ceiling is detected. The detection direction may be upward.

  That is, the display position sensor 32B may be any sensor that can detect a value serving as an index indicating whether the display unit 10 is at a high position or a low position. The display position sensors 32R and 32L only need to be able to detect a value serving as an index indicating whether the space existing on the left and right of the display unit 10 is wide or narrow.

  The control unit 60 includes a control unit 64, a display control circuit 66, and a memory 70. In addition, a keyboard 72 and a mouse 74 are connected to the control unit 60 as input devices.

  The control unit 64 controls the operation of the control unit 60 in an integrated manner, and includes a position acquisition unit (position acquisition unit) 64a, a display position determination unit (display position determination unit) 64b, a display control unit 64c, and an application 64d. Is included.

  The position acquisition unit 64 a acquires position information indicating the position of the detection target (wall, floor, etc.) with respect to the display screen of the display unit 12. Specifically, the position acquisition unit 64a acquires this position information from the display position sensors 32B, 32R, and 32L.

  The display position determination unit 64b uses the position information acquired by the position acquisition unit 64a to determine to display an operation key at a position determined in advance according to the position of the detection target with respect to the display screen.

  The display control unit 64 c instructs the display control circuit 66 to display an image on the display unit 12. For example, when the display position determination unit 64b determines (changes) the display position of the operation key, the display control unit 64c displays the operation key at the determined position.

  The application 64d is used for, for example, a presentation, and it is assumed here that an operation key is displayed during the operation of the application 64d. That is, the display position determination unit 64b displays operation keys for operation control of the application 64d. The position acquisition unit 64a, the display position determination unit 64b, and the display control unit 64c may be incorporated in the application 64d.

  The display control circuit 66 generates a display screen to be displayed on the display unit 12 in accordance with an instruction from the display control unit 64c of the control unit 64, and transmits the display screen to the display unit 12 to display it.

  The memory 70 is a storage device that stores various data required when the control unit 64 operates. The memory 70 can also be composed of, for example, a semiconductor memory, a magnetic recording medium, or the like.

  The position change of the display unit 10 can also be realized by a mechanism as shown in FIG. In the example of FIG. 2, the display unit 10 is fixed to a movable pedestal 42 having a telescopic column 40 that is telescopic in the vertical direction. In other words, the display unit 10 can be moved in any direction on the floor by the casters provided in the movable base 42, and the height of the display unit 10 from the floor is adjusted by expanding and contracting the telescopic column 40. be able to.

  The mechanism for changing the position of the display unit 10 is not limited to this example. For example, it may be suspended from the ceiling with a wire, and the height may be adjusted by the length of the wire. Further, for example, the position of the display unit 10 may be changed using a link mechanism using a bearing, a hydraulic pipe, a bellows mechanism, an articulated unit, or the like. Further, for example, the display unit 10 may be moved along a rail provided in the vertical direction or the horizontal direction.

[Operation example]
Next, a specific operation example of the display control system 1 will be described with reference to FIGS. 3 and 4. FIG. 3 is a diagram illustrating an example of the operation of the display control system 1 when the display unit 10 is moved. In the figure, the control unit 60 is not shown. FIG. 4 is a diagram for explaining the operation key group shown in FIG.

  FIG. 3A shows a state in which the display unit 10 is moved to the right side in the drawing from the state in which the operation key group 20 is displayed at the right end of the display unit and is brought close to the wall. As shown in the figure, the space at the right end of the display unit 10 is narrowed due to the movement, and the user who has performed the input operation on the display unit 12 can perform the input operation on the right side of the display unit 10 due to the obstacle. Has become difficult to do.

  Here, when the display unit 10 is brought close to the wall, the control unit 60 changes the display position of the operation key group 20 to the right end based on the detection result from the display position sensor 32R. This is because it is considered that no input operation is performed from the right side of the display unit 10 under such a situation. Thereby, the user can input to the operation key group 20 from the left side of the display unit 10 without performing any special operation.

  On the other hand, FIG. 3B shows a state when the height of the display unit 10 from the floor is increased. As shown in the figure, when the height of the display unit 10 from the floor is increased, the operation key may be located out of reach of the user's hand.

  Here, when the height of the display unit 10 from the floor increases, the control unit 60 arranges the operation keys in the horizontal direction instead of the operation key group 20 based on the detection result from the display position sensor 32B. The operated operation key group 22 is displayed below the display unit. This prevents the user from reaching the displayed operation key.

  In the example of FIG. 3B, the operation key group 22 is displayed in the center of the lower part of the screen, but it is detected that the wall is close to either the left side or the left side of the display unit 10. May be displayed on the side not close to the wall at the bottom of the screen. For example, when the height of the display unit 10 from the floor is high and a wall is close to the right side of the display unit 10, the operation key group 22 may be displayed on the lower left portion of the display screen. That is, the display position of the operation key group is not particularly limited as long as it can be easily operated by the user according to the position of the display unit 10.

[Operation keys]
FIG. 4A illustrates the operation key group 20. As shown in the figure, the operation key group 20 includes five operation keys (icons) arranged in the vertical direction (vertical direction). The arranged operation keys are “pen input key”, “eraser key”, “finger operation key”, “figure input key”, and “undo key (operation redo key)” in order from the top.

  By touching the “pen input key”, the pen input mode is set, and the user can draw a continuous line at the touched position on the screen. Further, by touching the “eraser key”, the eraser mode is set, and the user can erase the drawing data at the touched position on the screen.

  By touching the “finger operation key”, the finger operation mode is entered, and the user displays an operation for moving a slide or graphic data on the screen, an operation for enlarging / reducing, an operation for turning the slide to advance to the next slide, etc. This can be done by touching the screen.

  Further, by touching the “graphic input key”, the user can open a submenu (not shown) and perform an operation of drawing a preset graphic such as a circle, a triangle, or a rectangle in an arbitrary place. Further, by touching the “Undo key”, the user can cancel the previous operation.

  On the other hand, FIG. 4B is a diagram for explaining the operation keys 22 group. As shown in the drawing, the operation key group 22 is formed by arranging four operation keys in the horizontal direction (left-right direction). The arranged operation keys are “mouse operation key”, “finger operation key”, “undo key”, and “display down key” in order from the left.

  By touching the “mouse operation key”, a mouse operation mode is set, and an operation using the mouse 74 is possible. The “finger operation key” is an operation key for shifting to the finger operation mode as described above.

  As described above, the reason why the “mouse operation key” and the “finger operation key” are included in the operation key group 22 is that when the display screen is at a high position, the position that the user can touch on the display screen is limited. This is because it may be necessary to perform an operation with the mouse 74.

  The “Undo key” is the same as that included in the operation key 20 group, but the “Display down key” is an operation key included only in the operation key 22 group. The “display down key” is an operation key for adjusting the length of the telescopic column 40 and lowering the height of the display unit 10. For this reason, the “display lowering key” is included only in the group of operation keys 22 displayed when the display unit 10 is at a high position.

  The operation keys described above are merely examples, and an operation key to which an arbitrary function such as screen drawing or operation on the display unit 10 is assigned can be displayed. Further, the arrangement of operation keys is also arbitrary. For example, the operation keys may be arranged in two rows.

  However, if too many operation keys are displayed at a time, the operability is degraded. Therefore, it is preferable to display only necessary operation keys. In particular, as in the above-described example, it is preferable to display operation keys that are highly likely to be used by the user according to the position of the display unit 10 because the user's operability can be improved.

[Process flow]
Next, the flow of processing performed by the control unit 64 will be described with reference to FIG. FIG. 5 is a flowchart illustrating an example of processing executed by the control unit 64. This process is started when the application 64d is activated.

  When the process is started, the display control unit 64c of the control unit 64 displays an operation key group (for example, the operation key group 20) in which operation keys are arranged vertically at a position on the right side (right end) of the display screen ( S101). This is because, in the example of FIG. 5, a state in which the operation key group in which the operation keys are vertically arranged is displayed at the right end of the display screen is set as an initial state, and this display position is stored in the memory 70 in advance. is there. Of course, the display mode of the operation key group in the initial state is not limited to this example, and is arbitrary.

  When the operation key group is displayed, the position acquisition unit 64a transmits an instruction to the display position sensor 32R to measure the distance x from the left side of the display unit 10 to the wall (S102). The measurement instruction and the measured distance x are transmitted / received via the I / F 62, and the position acquisition unit 64a sends the received distance x to the display position determination unit 64b.

  When the display position determination unit 64b receives the distance x from the position acquisition unit 64a, the display position determination unit 64b compares the specified value a set in advance and stored in the memory 70 with the received distance x, and the distance x is equal to or less than the specified value a. It is determined whether or not (S103). The specified value a may be set as appropriate in consideration of user operability, and may be set, for example, between 20 cm and 50 cm.

  Here, when the distance x is equal to or less than the specified value a (YES in S103), it is considered that a wall approaches the left side of the display unit 10. For this reason, in this case, the operation key group is not moved to the left end of the display screen, but is displayed on the right end of the display screen in the initial state, and the process proceeds to S107.

  On the other hand, when the distance x is larger than the specified value a (NO in S103), that is, when it is considered that there is sufficient space on the left side of the display, the display position determination unit 64b displays the display unit 10 in the position acquisition unit 64a. The distance y from the right side to the wall is acquired (S104). The method for obtaining the distance y is the same as that for the distance x except that the sensor for obtaining the distance is changed to the display position sensor 32L.

  When the display position determination unit 64b receives the distance y from the position acquisition unit 64a, the display position determination unit 64b compares the specified value b set in advance and stored in the memory 70 with the received distance y, and the distance y is equal to or less than the specified value b. It is determined whether or not (S105). The specified value b may be set as appropriate in consideration of the user's operability as with the specified value a.

  Here, when the distance y is larger than the specified value b (NO in S105), it is considered that there is sufficient space on both the right and left sides of the display unit 10. For this reason, in this case, the operation key group is not moved to the left end of the display screen, but is displayed on the right end of the display screen in the initial state, and the process proceeds to S107.

  On the other hand, when the distance y is equal to or less than the specified value b (YES in S105), it is considered that a wall approaches the right side of the display unit 10 and that there is sufficient space on the left side. Therefore, in this case, the display position determination unit 64b instructs the display control unit 64c to move the display position of the operation key group (for example, the operation key group 20) to the position on the left side (left end) of the display screen. The process proceeds to S107. Note that the leftmost display position is stored in advance in the memory 70.

  Here, the operation key group only needs to be displayed in a range where the user can operate from the left side of the display screen, and may be a position where the operation key touches the left outer edge of the display screen. It may be the position. For example, the operation key group may be displayed at an arbitrary position in the left half area from the center of the display screen. However, if the display position of the operation key group is too close to the center, the image displayed on the display screen may be blocked by the user when the user touches the operation key group. For this reason, it is preferable to display the operation key group at the end of the display screen or in the vicinity thereof. The same applies when the operation key group is displayed at the right end, upper end, and lower end of the display screen.

  In S107, the display position determination unit 64b causes the position acquisition unit 64a to acquire the distance z from the lower side of the display unit 10 to the floor (S107). The method for obtaining the distance z is the same as the distance x except that the sensor for obtaining the distance is changed to the display position sensor 32B.

  When the display position determination unit 64b receives the distance z from the position acquisition unit 64a, the display position determination unit 64b compares the predetermined value c set in advance and stored in the memory 70 with the received distance z, and the distance z is equal to or greater than the predetermined value c. It is determined whether or not (S108). The specified value c may be set as appropriate in consideration of user operability like the specified values a and b. For example, the specified value c may be set between 130 cm and 180 cm.

  Here, when the distance z is equal to or greater than the specified value c (YES in S108), the display unit 10 is considered to be at a high position where it is difficult for the user to touch the upper portion of the display screen.

  Therefore, in this case, the display position determination unit 64b instructs the display control unit 64c to display the operation key group (for example, the operation key group 22) in which the operation keys are arranged in the horizontal direction at a position below the display screen ( (Lower end) is displayed (S109). The image of the operation key group in which the operation keys are arranged in the horizontal direction and the display position of the lower end are stored in the memory 70 in advance. Then, the display control unit 64c is instructed to delete the operation key group (the operation keys arranged in the vertical direction) that have been displayed so far (S112), and the process ends.

  On the other hand, when the distance z is smaller than the prescribed value c (NO in S108), the display position determining unit 64b compares the prescribed value d set in advance and stored in the memory 70 with the distance z, and the distance z It is determined whether z is equal to or less than a specified value d (S110). The specified value d may be set as appropriate in consideration of user operability like the specified values a, b, and c. For example, the specified value d may be set between 30 cm and 80 cm.

  Here, when the distance z is greater than the specified value d (NO in S110), the display unit 10 is considered to be at a height that is neither too high nor too low and easy for the user to operate. Therefore, in this case, the process ends without changing the display.

  On the other hand, when the distance z is less than or equal to the specified value d (YES in S110), the display unit 10 is considered to be at a low position where it is difficult for the user to touch the lower part of the display screen.

  Therefore, in this case, the display position determination unit 64b instructs the display control unit 64c to display the operation key group in which the operation keys are arranged in the horizontal direction at a position (upper end) on the display screen (S111). . The image of the operation key group in which the operation keys are arranged in the horizontal direction and the display position of the upper end are stored in the memory 70 in advance. Then, the display control unit 64c is instructed to delete the operation key group (the operation keys arranged in the vertical direction) that have been displayed so far (S112), and the process ends.

  According to the above processing, the operation key is displayed at a position that is easy for the user to operate according to the position of the display unit 10. Therefore, even when the display unit 10 is moved or the height of the display unit 10 is changed, the user operability can be maintained.

  In FIG. 5, the processing is to be terminated after S110 or S112. However, it is conceivable to move the position of the display unit 10 during the presentation. For this reason, it is preferable to measure the distance and change the display position of the operation key after S110 or S112.

  For example, the distance measurement and the operation key display position may be periodically changed at regular time intervals, or the distance measurement and the operation key display position may be detected when movement of the display unit 10 is detected. You may make it change. The movement of the display unit 10 can be detected by detecting the expansion and contraction of the telescopic column 40, for example, as long as it is a vertical movement. Moreover, if it is the movement of the left-right direction, it can also carry out by detecting rotation of the caster with which the movable base 42 is provided, for example.

  Further, in the example of FIG. 5, an example in which the display position sensor is instructed to acquire the distances x, y, and z in each of S102, S104, and S107 is shown, but these distances are acquired in a batch in S102. May be.

[Embodiment 2]
Another embodiment relating to the display control system of the present invention will be described below with reference to FIGS. For convenience of explanation, members having the same functions as those in the drawings described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

〔System configuration〕
First, the system configuration of the display control system 2 of the present embodiment will be described based on FIGS. 6 and 7. FIG. 6 is a block diagram showing a main configuration of the display control system 2, and FIG. 7 is a diagram showing an example of the appearance of the display control system (display control system) 2. As shown in the figure, the display control system 2 includes a control unit (display control device) 60 ′ and a display unit 10 ′.

  The display control system 1 detects the position of an obstacle such as a wall around the display unit 10 and the height of the display unit 10 from the floor, and changes the display position and display contents of the operation keys. there were. On the other hand, the display control system 2 is mainly characterized in that it detects the user's position and displays the operation keys at a position close to the user.

  The display unit 10 'is different from the display unit 10' in that it includes infrared sensors 34R and 34L instead of the display position sensors 32B, 32R, and 32L. The control unit 60 ′ is different from the control unit 60 in that it includes a person position acquisition unit (position acquisition unit) 64 a ′ instead of the position acquisition unit 64 a.

  The infrared sensors 34R and 34L are sensors that detect the positional relationship between the user and the display screen existing around the display unit 10 '(which part of the display screen the user is close to). As shown in FIG. 7, the infrared sensor 34 </ b> R is disposed at the lower right of the display unit 12, and the infrared sensor 34 </ b> L is disposed at the lower left of the display unit 12. Since the infrared sensors 34R and 34L detect infrared rays emitted by the user, it can be determined that the user is present near the stronger infrared ray detected out of the infrared sensors 34R and 34L.

  Note that the acquisition method of the positional relationship between the user and the display screen (which part of the display screen the user is close to) is not limited to this example. For example, when the user performs a touch operation on the display unit 12, it can be seen that the user exists near the position where the touch operation is performed. Therefore, the user and the display screen are detected using the position where the touch operation is detected. The positional relationship may be specified. For example, when the display unit 12 is configured by a liquid crystal display device with a built-in optical sensor, the positional relationship between the user and the display screen may be specified by the display unit 12 detecting a user image. Furthermore, for example, the positional relationship between the user and the display screen may be specified using an image captured by a camera or the like.

  The person position acquisition unit 64a 'acquires, as position information, information indicating at which position on the display screen the user performing the input operation to the operation key is in proximity. That is, in the example of FIG. 6, the detection values of the infrared sensors 34R and 34L are position information.

[Operation example]
Next, a specific operation example of the display control system 2 will be described with reference to FIG. FIG. 8 is a diagram illustrating an example of the operation of the display control system 2 when the user moves. In addition, illustration of control unit 60 'is abbreviate | omitted in the figure.

  FIG. 8A shows a state where the user who operates the display unit 10 ′ moves from the left side to the right side of the display unit 10 ′. As illustrated, the operation key group 20 moves from the left side to the right side of the display screen as the user moves.

  In FIG. 8B, contrary to FIG. 8A, the user is moving from the right side to the left side of the display unit 10 '. In this case, as illustrated, the operation key group 20 moves from the right side to the left side of the display screen as the user moves.

  As described above, the display control system 2 detects the position of the user and displays the operation key group 20 near the user. Thereby, the operability when the user performs a presentation or the like while moving in front of the display screen can be improved.

[Process flow]
Next, the flow of processing performed by the control unit 64 will be described with reference to FIG. FIG. 5 is a flowchart illustrating an example of processing executed by the control unit 64. This process is started when the application 64d is activated.

  When the process is started, the person position acquisition unit 64a 'transmits an instruction to the infrared sensors 34R and 34L to acquire detection values of the infrared sensors 34R and 34L, respectively. The detection value acquisition instruction and the detection value are transmitted / received via the I / F 62, and the person position acquisition unit 64a 'sends the received detection value to the display position determination unit 64b.

  The display position determination unit 64b that has received the detection value compares the detection value of the infrared sensor 34R with the detection value of 34L, and confirms whether or not the detection value of the infrared sensor 34L is greater than the detection value of 34R. (S201).

  Here, when the detection value of the infrared sensor 34L is larger than the detection value of 34R (YES in S201), the display position determination unit 64b determines whether or not the detection value of the infrared sensor 34L is larger than a predetermined lower limit value. (S202).

  When it is confirmed that the detection value of the infrared sensor 34L is larger than the predetermined lower limit value (YES in S202), the display position determination unit 64b instructs the display control unit 64c to move the operation key to the left. (S203), and the process ends. This display position is stored in the memory 70 in advance. On the other hand, if it is confirmed that the detection value of the infrared sensor 34L is equal to or lower than the predetermined lower limit value (NO in S202), the process is terminated without giving an instruction to move the operation key.

  The lower limit value is set to prevent the operation key from being moved based on infrared rays emitted from a user other than the user who is using the display unit 10 ′. Therefore, the lower limit value may be set as appropriate within a range in which this object can be achieved.

  Here, in S201, when the detection value of the infrared sensor 34L is equal to or less than the detection value of 34R (NO in S201), the display position determination unit 64b determines that the detection value of the infrared sensor 34R is a predetermined lower limit value. It is confirmed whether it is larger than (S204).

  When it is confirmed that the detection value of the infrared sensor 34R is larger than the predetermined lower limit value (YES in S204), the display position determination unit 64b instructs the display control unit 64c to move the operation key to the right. (S205), and the process ends. On the other hand, when it is confirmed that the detection value of the infrared sensor 34R is equal to or less than the predetermined lower limit value (NO in S202), the process is terminated without performing the operation key movement instruction.

  In FIG. 9, when it is considered that the user is located near the infrared sensor 34R, the operation key is displayed at the right position (for example, the right end of the display screen) and is considered located near 34L. In such a case, the operation key is displayed at the left position (for example, the left end of the display screen).

  However, the position where the operation key is displayed may be in a range where the operation key can be operated from the position where the user is considered to exist. For example, when the user is positioned closer to the infrared sensor 34R, the operation key may be positioned so as to contact the outer edge on the right side of the display screen, or the user positioned closer to the infrared sensor 34R. The position may be as close to the center as possible. In addition, for example, when the size of the display unit 12 is extremely large, if the operation key is displayed at the end of the display screen, the distance from the user to the operation key may be increased. For this reason, in such a case, the operation keys may be displayed near the user instead of the end of the display screen.

  In FIG. 9, for the sake of simplicity, the processing is ended after the operation key is moved or after it is determined not to move. However, during the operation of the application 64d, in order to move the operation key in accordance with the movement of the user, the processing from S201 to S205 is continuously performed during the operation of the application 64d. Note that the processing from S201 to S205 may be performed at a constant cycle, or may be performed at the timing when the user moves. For example, when the detection value of the infrared sensor 34R or 34L changes, it may be determined that the user has moved, and the processing from S201 to S205 may be performed.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in each embodiment are also included. It is included in the technical scope of the present invention.

[Example of implementation by program]
Finally, each block of the control units 60 and 60 ′, in particular, the position acquisition unit 64a, the display position determination unit 64b, the display control unit 64c, and the person position acquisition unit 64a ′ may be configured by hardware logic. Alternatively, it may be realized by software using a CPU as follows.

  In other words, the control units 60 and 60 ′ include a CPU (central processing unit) that executes instructions of a control program that realizes each function, a ROM (read only memory) that stores the program, and a RAM (random access) that expands the program. memory), a storage device (recording medium) such as a memory for storing the program and various data. An object of the present invention is a record in which the program code (execution format program, intermediate code program, source program) of the control program of the control units 60 and 60 ′, which is software that realizes the above-described functions, is recorded in a computer-readable manner. This can also be achieved by supplying a medium to the control units 60 and 60 ′ and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU).

  Examples of the recording medium include a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, and an optical disk such as a CD-ROM / MO / MD / DVD / CD-R. Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM / flash ROM.

  Further, the control units 60 and 60 'may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Also, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used. 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.

  According to the present invention, the operation key is automatically displayed at a position where the user can easily perform an input operation. For this reason, it can be preferably applied to an electronic conference system using a large display.

10 Display Unit 12 Display Unit (Display / Input Device)
20 Operation keys (operation keys)
22 Operation keys (operation keys)
32B Display position sensor (detection device)
32R display position sensor (detection device)
32L display position sensor (detection device)
34R Infrared sensor 34L Infrared sensor 60 Control unit (display control device)
64a Position acquisition unit (position acquisition means)
64b Display position determining unit (display position determining means)
64a 'person position acquisition unit (position acquisition means)

Claims (8)

A display control device that displays an operation key on a display / input device that detects an input operation performed on the operation key displayed on the display screen and associated with a predetermined process. And
Position acquisition means for acquiring position information indicating a position of a detection target existing around the display screen with respect to the display screen;
Display position determining means for displaying the operation key at a position determined in advance according to the position of the detection target with respect to the display screen, using the position information acquired by the position acquisition means ;
The position acquisition means acquires, as the position information, an output from a detection device that is provided in the display / input device and detects a distance from a detection target toward the right or left side of the display screen.
When the distance to the detection target indicated by the position information is equal to or less than a predetermined lower limit value, the display position determining means is the end of the display screen opposite to the side where the distance is equal to or less than the lower limit value. A display control apparatus that displays the operation keys on the display. A display control device that displays an operation key on a display / input device that detects an input operation performed on the operation key displayed on the display screen and associated with a predetermined process. And
Position acquisition means for acquiring position information indicating a position of a detection target existing around the display screen with respect to the display screen;
Display position determining means for displaying the operation key at a position determined in advance according to the position of the detection target with respect to the display screen, using the position information acquired by the position acquisition means;
The position acquisition means acquires information indicating the height from the floor of the display screen as the position information from a detection device provided in the display / input device,
The display position determining means displays the operation key on the lower end of the display screen when the height from the floor of the display screen indicated by the position information is equal to or greater than a predetermined lower limit value. A display control device. The position acquisition unit acquires, as the position information, information indicating at which position on the display screen a user performing an input operation to the operation key is in proximity.
The display position determining means, the display control device according to claim 1 or 2, wherein the displaying the operation key in the vicinity of the position or the position the user which the location information indicates are close. Display of a display control device that displays the operation key on a display / input device that detects an input operation performed on the display screen for an operation key associated with a predetermined process displayed on the display screen A control method,
A position acquisition step for acquiring position information indicating a position of a detection target existing around the display screen with respect to the display screen;
Using the position information acquired in the position acquisition step, seen including a display position determining step of displaying the operation key at a predetermined position according to the position of the detection target with respect to the display screen,
In the position acquisition step, an output from a detection device that detects a distance from a detection target toward the right or left side of the display screen provided in the display / input device is acquired as the position information.
In the display position determining step, when the distance to the detection target indicated by the position information is equal to or less than a predetermined lower limit value, an end of the display screen opposite to the side where the distance is equal to or less than the lower limit value A display control method characterized in that the operation key is displayed on the display.   Display of a display control device that displays the operation key on a display / input device that detects an input operation performed on the display screen for an operation key associated with a predetermined process displayed on the display screen A control method,
  A position acquisition step for acquiring position information indicating a position of a detection target existing around the display screen with respect to the display screen;
  Using the position information acquired in the position acquisition step, a display position determination step of displaying the operation key at a position determined in advance according to the position of the detection target with respect to the display screen,
  In the position acquisition step, information indicating the height from the floor of the display screen is acquired as the position information from the detection device provided in the display / input device,
  In the display position determination step, when the height from the floor of the display screen indicated by the position information is equal to or higher than a predetermined lower limit value, the operation key is displayed on a lower end portion of the display screen. Display control method. A display control device according to any one of claims 1 to 3, and a said display / input device, a display control system. A display control program for operating the display control device according to any one of claims 1 to 3 , wherein the display control program causes a computer to function as each of the means.   A computer-readable recording medium on which the display control program according to claim 7 is recorded.

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