JP7267166B2 - Display control device, image display system and program - Google Patents

Description

The present disclosure relates to technology for controlling an image displayed on a screen.

Japanese Unexamined Patent Application Publication No. 2003-108311 (Patent Document 1) discloses a system including a screen that displays an image of an icon and a touch pad that is provided at a position separate from the screen and receives an operation by a user. ing. A user of this system can select an icon displayed on the screen by operating a touch pad provided at a position separate from the screen.

Japanese Patent Application Laid-Open No. 2003-108311

In recent years, in a device (hereinafter also referred to as "remote device") of a type in which the screen and the touchpad are arranged at positions separated from each other, such as the system disclosed in Patent Document 1, the item list displayed on the screen is There is known a technique of scrolling by following the amount of user's touch operation (the amount of finger movement). In such conventional list scrolling technology, the amount of scrolling of the item list is determined according to the amount of movement of the user's finger. You have to do it, and you can spend a lot of time staring at the screen. Therefore, when the conventional scrolling technology is applied to, for example, a remote device of a mobile body, the user (driver of the mobile body) spends a long time watching the screen to select the desired item. It can also be a factor that distracts you from things other than driving.

The present disclosure has been made in order to solve the above-described problems, and its purpose is to reduce the time the user spends gazing at the screen when scrolling items displayed on the screen by the user's operation. , to enable the user to appropriately select the target item.

A display control device according to the present disclosure is a display control device that controls an image displayed on a screen, and includes an acquisition unit that acquires a signal capable of specifying a user's operation amount and an operation direction, and a signal acquired by the acquisition unit. A computing unit that generates a signal for controlling an image displayed on a screen based on the specified operation amount, and an output unit that outputs the signal generated by the computing unit to the outside. The screen displays an image showing an item list in which selected items displayed inside a selection area whose position is fixed and non-selected items displayed outside the selection area are displayed at predetermined intervals. be. When the selected item is the first item and the manipulated variable is less than the threshold value, the computing unit causes the item list to linearly follow the manipulated variable within a range in which the selected item is maintained as the first item. A first control that generates a signal for scrolling is executed. When the operation amount exceeds the threshold value while the selected item is the first item, the computing unit scrolls the item list step by step to change the selected item from the first item to a different item from the first item. A second control is executed that generates a signal to change to 2 items.

According to the display control device described above, when the user's operation amount is less than the threshold amount, the calculation unit executes the first control. In the first control, the calculation unit generates a signal for linearly scrolling the item list following the operation amount within a narrow range in which the selection item is maintained at the current first item. That is, in the first control, the item list is scrolled according to the user's operation amount, but the scroll amount is limited to a narrow range in which the selected item is maintained at the current first item. As a result, it is possible to reduce the amount of time the user spends gazing at the item list displayed on the screen. On the other hand, when the user's operation amount exceeds the threshold amount, the calculation unit executes the second control. In the second control, the calculation unit generates a signal for changing the selection item from the current first item to the next second item by scrolling the item list step by step. That is, in the second control, the item list is scrolled stepwise regardless of the amount of operation by the user, and the selection items are changed stepwise. Thereby, the user can appropriately change the selection item to the next second item aimed at by the user without finely adjusting the operation amount of the user. As a result, it is possible to prevent the user from gazing at the screen for a long time, and to allow the user to appropriately select the target item.

The image display system according to the present disclosure includes the above-described display control device, an operation detection device connected to the acquisition unit and outputting a signal capable of specifying the operation amount and the operation direction to the acquisition unit, and an output unit connected to the output unit. a display device for displaying an image to be displayed on a screen according to a signal output from the display device;

A program according to the present disclosure is a program for causing an arithmetic device to execute a display control method for controlling an image displayed on a screen. The screen displays an image showing an item list in which selected items displayed inside a selection area whose position is fixed and non-selected items displayed outside the selection area are displayed at predetermined intervals. be. In the display control method, when the selected item is the first item and the amount of operation is less than the threshold value, the item list is made to follow the amount of operation within the range in which the selected item is maintained as the first item. and stepwise scrolling the item list when the operation amount exceeds the threshold value in a state where the selected item is the first item. and executing a second control that generates a signal to change the selection item from the first item to a second item different from the first item.

According to the present disclosure, when items displayed on the screen are scrolled by the user's operation, it is possible to allow the user to appropriately select the target item while reducing the time the user spends gazing at the screen. .

It is a figure which shows typically an example of the whole structure of an image display system. FIG. 4 is a diagram illustrating an item list displayed on the screen of the display device; FIG. 10 is a flowchart showing an example of a processing procedure executed by a computing unit when scrolling an item list; FIG. FIG. 10 is a diagram showing an example of a user operation when follow-up scroll control is executed; FIG. 10 is a diagram illustrating an example of a scroll state of an item list when follow-up scroll control is executed; FIG. 10 is a diagram showing an example of user operation when step scroll control is executed; FIG. 10 is a diagram showing an example of a scroll state of an item list when step scroll control is executed;

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated.

<Overall composition>
FIG. 1 is a diagram schematically showing an example of the overall configuration of an image display system 1 including a display control device 20 according to this embodiment. The image display system 1 includes an operation detection device 10 , a display control device 20 and a display device 30 . This image display system 1 is mounted, for example, on a vehicle. Note that the image display system 1 is not limited to being mounted on a vehicle, and may be mounted on a moving object other than a vehicle, such as a ship or an aircraft. Further, the image display system 1 is not limited to being mounted on a moving object, and may be mounted on a stationary object such as a simulator.

When the image display system 1 is mounted on a vehicle, the display device 30 may be, for example, a head-up display for displaying information on the windshield of the vehicle or the like. The image displayed on the screen 31 of the display device 30 includes an item list having a plurality of items regarding various devices mounted on the vehicle, such as audio devices, navigation devices, air conditioners, and communication devices. Each item in the item list contains an icon and character information.

FIG. 2 is a diagram exemplifying an item list 32 displayed on the screen 31 of the display device 30. As shown in FIG. In the example shown in FIG. 2, the items included in the item list 32 are, from the top of the screen 31, an item I1 for selecting an air conditioner (air conditioner), an item I2 for selecting an agent, and an audio device ( An item I3 for selecting music) is displayed. Each item I1 to I3 includes an icon and character information indicating the content to be selected.

A selection area 33 is provided in a substantially central portion of the screen 31 in the vertical direction. The item displayed inside the selection area 33 (item I2 in the example shown in FIG. 2) is treated as the "selection item" selected by the user, and the item displayed outside the selection area 33 (in the example shown in FIG. 2 Items I1 and I3) are treated as "unselected items" that are not selected by the user. Normally, the selection item is displayed in the center of the selection area 33 in the vertical direction.

Note that the display mode of the selection area 33 is not particularly limited. For example, an image showing the boundary line between the inside and outside of the selection area 33 may be displayed, or the color of the selection item displayed inside the selection area 33 may be changed to the non-selection color displayed inside the selection area 33 . You may make it differ from the color of an item.

The position of the selection area 33 is fixed at the substantially central portion of the screen 31 in the vertical direction. The user can change the selected item by performing an operation to scroll the item list 32 in the vertical direction.

Returning to FIG. 1 , the operation detection device 10 detects a user's operation and outputs the detection result to the display control device 20 . The operation detection device 10 is arranged at a position separated from the display device 30 . When the image display system 1 is mounted on a vehicle, the operation detection device 10 is, for example, a spoke portion of a steering wheel of the vehicle (a portion connecting a hub portion connected to the steering shaft and a grip portion held by the driver). may be placed in By arranging in such a position, the user (driver) can smoothly operate the operation detection device 10 with the tip of the thumb while gripping the steering wheel.

In the present embodiment, the operation detection device 10 has a flat touch pad 11 having a surface that accepts user's operations. The operation detection device 10 is configured to detect a “touch operation” in which the user touches the touch pad 11 . Note that the touch operation detection method is not particularly limited. For example, a method of detecting a change in capacitance caused by a user touching the touch pad 11 (a so-called capacitance method) may be used, or a minute pressure caused by a user lightly touching the touch pad 11 may be used. A method of detecting a change may be used. In addition to the touch operation, the operation detection device 10 may be configured to be able to detect the pressing operation of the user pressing the touch pad 11 .

The operation detection device 10 outputs a touch detection signal to the display control device 20 when detecting a touch operation. The touch detection signal includes information indicating the absolute coordinates of the contact position (touch position) on the touch pad 11 . From the trajectory of the absolute coordinates of the touch position, the amount and direction of movement of the touch position can be identified. In other words, the touch detection signal is a signal that can identify the user's operation amount and operation direction.

The display control device 20 includes an acquisition unit 21 , an output unit 23 , a storage unit 24 and a calculation unit 25 . The acquisition unit 21 is an input port to which the above-described touch detection signal indicating the detection result of the operation detection device 10 is input. The output unit 23 is an output port for outputting the display control signal generated by the calculation unit 25 to the display device 30 .

The storage unit 24 is a storage medium that stores information, programs, and the like used for calculations by the calculation unit 25 . The storage unit 24 may be composed of storage elements such as ROM (Read Only Memory) and RAM (Random Access Memory). Also, the storage unit 24 may be a removable medium that can be removed from the display control device 20 .

The calculation unit 25 is connected to the acquisition unit 21 , the output unit 23 and the storage unit 24 . The calculation unit 25 is a calculation device including a CPU (Central Processing Unit) or the like. The calculation unit 25 generates a display control signal for controlling the display mode of the item list 32 displayed on the display device 30 based on the signal acquired by the acquisition unit 21, and displays the generated display control signal from the output unit 23. Output to device 30 . As a result, the item list 32 displayed on the display device 30 is displayed in a display mode according to the display control signal.

The processing of the calculation unit 25 is performed by software processing, that is, the program stored in the storage unit 24 is read out by the calculation unit 25 and executed. Note that the processing of the calculation unit 25 is not limited to software processing, and may be processed by dedicated hardware (electronic circuit).

Although the display control device 20 is shown in FIG. 1 at a position separate from the operation detection device 10 and the display device 30, the position of the display control device 20 is not limited to this. For example, the display control device 20 may be arranged at the same position or a position close to the operation detection device 10 , or may be arranged at the same position or a position close to the display device 30 .

<Scroll control of item list>
In recent years, in a remote device in which the screen on which the item list is displayed and the touch pad that detects the movement of the user's finger are placed at positions separated from each other, the item list is scrolled linearly by following the movement of the user's finger. There are known techniques for If such a conventional list scrolling technique is simply applied to the above-described image display system 1, the amount of scrolling of the item list 32 displayed on the screen 31 is determined according to the amount of movement of the user's finger. In order to select the target item, the user needs to finely adjust the movement amount of the finger, which may increase the time spent gazing at the screen 31 . For example, when the image display system 1 is mounted on a mobile object such as a vehicle, the user (driver of the mobile object) has a longer time to gaze at the screen 31 in order to select a target item. It can also be a factor that distracts you from things other than driving.

In particular, if the object to be moved is a cursor that does not contain character information (that is, the amount of information is small), the user can visually recognize the movement of the cursor without looking at the screen 31 that much. In the system 1, the item list 32 that includes character information (that is, has a large amount of information) is the object to be moved, so it is assumed that the user will spend more time gazing at the screen 31. FIG.

Furthermore, in the conventional list scrolling technology, the amount of scrolling of the item list 32 is linearly determined with respect to the amount of movement of the user's finger. It is also assumed that the readability of the list 32 is degraded.

In order to solve the above problems, the calculation unit 25 according to the present embodiment controls scrolling of the item list 32 displayed on the display device 30 according to the signal acquired by the acquisition unit 21 as follows. . Note that hereinafter, a state in which the acquisition unit 21 does not acquire a touch detection signal (that is, a state in which the user does not perform a touch operation on the touch pad 11) is also referred to as a “non-touch state”. A state in which a detection signal is being acquired (that is, a state in which the user is performing a touch operation on the touch pad 11) is also referred to as a “touch state”. Both the non-touch state and the touch state indicate the user's operation state.

FIG. 3 is a flowchart showing an example of a processing procedure executed by the calculation unit 25 when scrolling the item list 32. As shown in FIG. This flowchart is started when the user's operation state is the non-touch state.

First, the calculation unit 25 determines whether or not the user's operation state has changed from the non-touch state to the touch state based on the signal acquired by the acquisition unit 21 (step S10). If the user's operation state has not changed from the non-touch state to the touch state (NO in step S10), the calculation unit 25 skips the subsequent processing and shifts the processing to RETURN.

On the other hand, when the user's operation state changes from the non-touch state to the touch state (YES in step S10), the calculation unit 25 calculates the absolute coordinates of the touch position indicated by the touch detection signal at the time when the non-touch state changes to the touch state. is stored in the storage unit 24 as the initial touch position P0 (step S20).

After that, the calculation unit 25 determines whether or not the vertical movement amount L of the touch position is less than the threshold amount Lth (step S30). Specifically, the calculation unit 25 calculates the vertical difference (absolute value) between the current touch position and the initial touch position P0 stored in the storage unit 24 as the vertical movement amount L (absolute value) of the touch position. ), and it is determined whether or not the specified movement amount L is less than the threshold amount Lth. The vertical movement amount L of the touch position corresponds to the user's operation amount. The threshold amount Lth is pre-stored in the storage unit 24 . The magnitude of the threshold amount Lth may be a fixed value or a variable value that can be arbitrarily set by the user.

If the vertical movement amount L of the touch position is less than the threshold amount Lth (YES in step S30), the calculation unit 25 executes follow-up scroll control (first control) as scroll control for the item list 32 ( step S40).

In the tracking scroll control, the calculation unit 25 linearly scrolls the item list 32 following the movement amount L within a range in which the selection item displayed inside the selection area 33 is maintained as the current item. At this time, the calculation unit 25 scrolls the item list 32 in a specific direction according to the moving direction of the touch position (user's operation direction). Specifically, if the current touch position is located above the initial touch position P0, the calculation unit 25 specifies the moving direction of the touch position as "above", and determines that the current touch position is above the initial touch position P0. is positioned downward, the direction of movement of the touch position is specified as "downward". Then, the calculation unit 25 scrolls the item list 32 “upward” when the moving direction of the touch position is “upward”, and scrolls the item list 32 “downward” when the moving direction of the touch position is “downward”. ”. However, the amount of scrolling through the item list 32 is limited within a narrow range in which the selected item remains the current item.

In this manner, in the follow-up scroll control, the item list 32 is linearly moved in the direction corresponding to the movement direction of the touch position, following the movement amount L, within a narrow range in which the selected item is maintained at the current item. scrolled.

After that, the calculation unit 25 determines whether or not the user's operation state has changed from the touch state to the non-touch state (step S50). When the user's operation state changes from the touch state to the non-touch state (YES in step S50), the calculation unit 25 stops follow-up scroll control and shifts the processing to return. As a result, the item list 32 is returned to the position before the tracking scroll control.

On the other hand, if the user's operation state has not changed from the touch state to the non-touch state (NO in step S50), the calculation unit 25 returns the process to step S30, and repeats the processes after step S30.

When it is determined in step S30 that the vertical movement amount L of the touch position exceeds the threshold amount Lth (NO in step S30), the calculation unit 25 performs step scroll control (second scroll control) as scroll control of the item list 32. control) is executed (step S60).

In the step scroll control, the calculation unit 25 changes the selection items displayed inside the selection area 33 step by step by scrolling the item list 32 step by step. At this time, the calculation unit 25 scrolls the item list 32 in the same direction as the tracking scroll control. That is, when the moving direction of the touched position is "upward", the calculation unit 25 scrolls the item list 32 "upward" in a step-by-step manner so that the selected item is moved from the current item to below the current item. Step by step to adjacent items on the side. On the other hand, when the moving direction of the touched position is "downward", the calculation unit 25 scrolls the item list 32 "downward" step by step, thereby moving the selected item from the current item to above the current item. Step by step to adjacent items on the side. After executing the step scroll control, the calculation unit 25 shifts the processing to return.

FIG. 4 is a diagram illustrating an example of a user operation when follow scroll control is executed. The example shown in FIG. 4 shows a case where the user attempts to scroll the item list 32 and moves the touch position from the initial touch position P0 to a first touch position P1 slightly above the initial touch position P0. there is The first touch position P1 is less than the threshold amount Lth from the initial touch position P0. When such an operation is performed, the above-described "follow-up scroll control" is executed.

FIG. 5 is a diagram showing an example of the scroll state of the item list 32 when follow-up scroll control is executed by the operation shown in FIG. 4 described above. In the example shown in FIG. 5, the user performs the operation shown in FIG. 4 above in the state shown in FIG. The scrolling state of the item list 32 is shown when it is done.

In this case, within a narrow range in which the selection items displayed inside the selection area 33 are maintained at the current "item I2 (agent)", the item list 32 is " It is linearly scrolled upwards, following the movement amount L. A user who sees such movement of the item list 32 can confirm that the item list 32 is scrolled upward by performing an operation of moving the touch position upward. In other words, the user can confirm the scrolling direction of the item list 32 by slightly moving his or her finger touching the touch pad 11, and therefore, which direction should the user move his or her finger to display the target item? can be grasped intuitively. Therefore, for example, when the user wants to change the selection item to "item I3 (music)" adjacent to the lower side of the item I2, the user can move the finger upward without delay.

Furthermore, in follow-up scroll control, the amount of scrolling of the item list 32 is limited to a narrow range in which the selected item is maintained at the current item I2, so the time for the user to gaze at the screen 31 can be reduced. Furthermore, it is possible to prevent the readability of the item list 32 from deteriorating due to scrolling.

FIG. 6 is a diagram illustrating an example of a user operation when step scroll control is executed. In the example shown in FIG. 6, when the user attempts to change the selected item from the current "item I2 (agent)" to "item I3 (music)" which is adjacent to the lower side of item I2, the user returns to the above-described FIG. A case is shown in which following the illustrated operation, the finger is moved further upward to move the touch position to a second touch position P2 above the first touch position P1. The distance of the second touch position P2 from the initial touch position P0 exceeds the threshold amount Lth. When such an operation is performed, the "step scroll control" described above is executed.

FIG. 7 is a diagram showing an example of the scroll state of the item list 32 when the step scroll control is executed by the operation shown in FIG. 6 described above. When the operation shown in FIG. 6 described above is performed, the item list 32 is scrolled step by step in the same "upward" direction as the user's operation direction "upward" by the step scroll control, and is displayed inside the selection area 33. The selected item to be selected is changed stepwise from "item I2 (agent)" to "item I3 (music)" adjacent to the lower side of item I2. In the example shown in FIG. 7, as the item list 32 is scrolled step by step, the item I1 (air conditioner) that was displayed above the item I2 (agent) is no longer displayed, and the item that is the selection item is displayed. An example is shown in which item I4 (call) is newly displayed below I3 (music).

In this way, when the movement amount L exceeds the threshold amount Lth due to the user moving his or her finger in contact with the touch pad 11 by a large amount, the item list 32 is displayed as a step irrespective of the movement amount L. scrolls continuously, stepping the selection from the current item to the next item. That is, in the step scroll control, the user can appropriately change the selected item to the target item by simply moving his or her finger significantly without finely adjusting the amount of movement of the user's finger.

As described above, the display control device 20 according to the present embodiment includes the acquisition unit 21 that acquires a signal from the operation detection device 10, and a signal that is displayed on the screen 31 of the display device 30 based on the signal acquired by the acquisition unit 21. and an output unit 23 for outputting the signal generated by the calculation unit 25 to the display device 30 . A screen 31 of the display device 30 displays an image showing an item list 32 including selection items displayed inside a selection area 33 whose position is fixed and non-selection items displayed outside the selection area 33 . be done.

When the vertical movement amount L of the touch position is less than the threshold amount Lth, the calculation unit 25 executes follow-up scroll control (first control). In the tracking scroll control, the calculation unit 25 generates a signal for linearly scrolling the item list 32 following the movement amount L within a narrow range in which the selected item is maintained at the current item. That is, in follow-up scroll control, the item list 32 is scrolled following the user's operation amount, but the scroll amount is limited to a narrow range in which the selected item is maintained at the current item I2. Therefore, it is possible to reduce the time the user spends gazing at the screen 31 . Furthermore, it is possible to prevent the readability of the item list 32 from deteriorating.

On the other hand, when the vertical movement amount L of the touch position exceeds the threshold amount Lth, the calculation unit 25 executes step scroll control (second control). In the step scroll control, the calculation unit 25 generates a signal for changing the selected item from the current item to the next item by scrolling the item list 32 step by step. That is, in the step scroll control, the item list 32 is scrolled step by step regardless of the movement amount L, and the selection item is changed step by step. As a result, the user can appropriately change the selection item to the target item by simply moving his/her finger significantly without finely adjusting the amount of movement of the user's finger. As a result, it is possible to prevent the user from gazing at the screen 31 for a long time, and to allow the user to appropriately select the target item.

Further, the calculation unit 25 scrolls the item list 32 in the same direction as the moving direction of the touch position in follow scroll control, and scrolls the item list 32 in the same direction as the moving direction of the touch position in step scroll control. Therefore, the user can confirm the scroll direction of the item list 32 by the subsequent step scroll control by slightly moving the touch position and confirming the scroll direction of the item list 32 by the follow scroll control. As a result, the user can intuitively grasp which direction to move his/her finger to select the target item by only slightly moving the touch position.

<Modification 1>
In the above-described embodiment, in follow-up scroll control and step scroll control, when the direction of movement of the touch position is "upward", the item list 32 is scrolled "upward", and the direction of movement of the touch position is "downward". The example of scrolling the item list 32 “downward” when .

However, in follow scroll control and step scroll control, if the scroll direction of the item list 32 is uniquely determined according to the direction of movement of the touch position, the direction of movement of the touch position and the scroll direction of the item list 32 is not particularly limited. For example, the moving direction of the touch position and the scrolling direction of the item list 32 may be reversed. That is, the item list 32 is scrolled "downward" when the moving direction of the touch position is "upward", and the item list 32 is scrolled "upward" when the moving direction of the touch position is "downward". can be

<Modification 2>
After execution of the step scroll control described above, the following processing may be performed.

For example, after the selection item is changed from the first item to the second item by step scroll control, if the movement amount L further exceeds a second threshold value Lth2 larger than the threshold amount Lth, the item list 32 may be further scrolled step by step to change the selection item from the second item to the next third item. As a result, the user can step-wise change the selection item twice in succession without removing the finger from the touch pad 11 . By setting three or more threshold amounts, it is possible to change the selection item three or more times in a stepwise manner.

Further, for example, after the selection item is changed from the first item to the second item by the step scroll control, each time the threshold time is exceeded, The item list 32 may be further scrolled step by step to change the selection item step by step. As a result, even when the area of the touch pad 11 is small and the amount of movement of the touch position is limited, the user can continuously change the selection item step by step without removing the finger from the touch pad 11. can do.

<Modification 3>
In the above-described embodiment, an example in which the operation detection device 10 and the display device 30 are arranged at separate positions has been described. It may be arranged over the screen 31 of the device 30 so that the user can directly touch and press the screen 31 .

It should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present disclosure is indicated by the scope of the claims rather than the above description, and is intended to include all modifications within the scope and meaning of equivalents of the scope of the claims.

The exemplary embodiments and modifications thereof described above are specific examples of the following aspects.
(1) A display control device according to one aspect of the present disclosure is a display control device that controls an image displayed on a screen, and includes an acquisition unit that acquires a signal that can specify a user's operation amount and an operation direction; a calculation unit for generating a signal for controlling an image displayed on a screen based on an operation amount specified by a signal acquired by the unit; and an output unit for outputting the signal generated by the calculation unit to the outside. Prepare. The screen displays an image showing an item list in which selected items displayed inside a selection area whose position is fixed and non-selected items displayed outside the selection area are displayed at predetermined intervals. be. When the selected item is the first item and the manipulated variable is less than the threshold value, the computing unit causes the item list to linearly follow the manipulated variable within a range in which the selected item is maintained as the first item. A first control that generates a signal for scrolling is executed. When the operation amount exceeds the threshold value while the selected item is the first item, the computing unit scrolls the item list step by step to change the selected item from the first item to a different item from the first item. A second control is executed that generates a signal to change to 2 items.

According to the above aspect, when the user's operation amount is less than the threshold amount, the calculation unit executes the first control (following scroll control). In the first control, the calculation unit generates a signal for linearly scrolling the item list following the operation amount within a narrow range in which the selection item is maintained at the current first item. That is, in the first control, the item list is scrolled according to the user's operation amount, but the scroll amount is limited to a narrow range in which the selected item is maintained at the current first item. Therefore, it is possible to reduce the amount of time the user spends gazing at the screen by scrolling the item list.

On the other hand, when the user's operation amount exceeds the threshold amount, the calculation unit executes the second control (step scroll control). In the second control, the calculation unit generates a signal for changing the selection item from the current first item to the next second item by scrolling the item list step by step. That is, in the second control, the item list is scrolled stepwise regardless of the amount of operation by the user, and the selection items are changed stepwise. Thereby, the user can appropriately change the selection item to the next second item aimed at by the user only by increasing the amount of operation of the user to be larger than the threshold amount without fine-tuning the amount of operation of the user. can be done. As a result, it is possible to prevent the user from gazing at the screen for a long time, and to allow the user to appropriately select the target item.

(2) In one aspect, in the first control, the calculation unit generates a signal for scrolling the item list in a specific direction according to the operation direction. The calculation unit generates a signal for scrolling the item list in a specific direction in the second control.

According to the above aspect, the computing unit scrolls the item list in the specific direction according to the user's operation direction in the first control, and also scrolls the item list in the second control according to the user's operation direction in the same manner as in the first control. scroll in the direction of Therefore, by confirming the scroll direction of the item list in the first control, the user can intuitively grasp the scroll direction of the item list in the subsequent second control.

(3) In one aspect, the selected items and non-selected items included in the item list include character information.

According to the above aspect, the item list displayed on the screen includes text information with a large amount of information, and it is assumed that the user will spend more time gazing at the screen. can be enjoyed more effectively. In particular, in the first control, the amount of scrolling of the item list is restricted to a narrow range, so the amount of scrolling of the character information included in each item is also reduced, improving readability.

Further, in one aspect, after the operation amount exceeds the threshold amount and the selection item is changed to the second item, the operation unit exceeds another threshold amount larger than the threshold amount. If so, a signal is generated to change the selected item from the second item to the third item adjacent to the second item by stepping through the item list.

According to the above aspect, after the user changes the selection item from the first item to the second item by increasing the operation amount above the threshold amount, the user further increases the operation amount above the other threshold amount. , the selection item can be changed stepwise continuously to the next third item.

Further, in a certain aspect, the computing unit determines the amount of time for which the operation amount is maintained to exceed the threshold after the selection item is changed to the second item due to the operation amount exceeding the threshold. Each time the threshold time is exceeded, a signal is generated to step change the selection by stepping through the list of items.

According to the above aspect, after the user changes the selection item from the first item to the second item by making the operation amount larger than the threshold amount, the operation amount continues to exceed the threshold amount. , the selected item can be changed continuously to the next item in a stepwise manner.

(4) An image display system according to an aspect of the present disclosure includes the above-described display control device, an operation detection device connected to the acquisition unit and outputting a signal capable of specifying an operation amount and an operation direction to the acquisition unit, an output unit a display device that is connected to and displays an image to be displayed on a screen according to a signal output from the output unit.

According to the above aspect, it is possible to provide an image display system that achieves the above effects.

(5) In one aspect, the operation detection device and the display device are arranged at positions separated from each other.

According to the above aspect, the operation detection device and the display device are arranged at positions separated from each other, and the user needs to visually confirm the scroll amount of the item list only by the display on the screen. can be enjoyed to

(6) In one aspect, the image display system is mounted on a mobile object.
According to the above aspect, since the image display system is mounted on the moving body and it is desirable to reduce the factors that cause the user to be distracted by things other than driving the moving body, the above effects can be enjoyed more effectively. .

(7) A program according to one aspect of the present disclosure is a program for causing an arithmetic device to execute a display control method for controlling an image displayed on a screen. The screen displays an image showing an item list in which selected items displayed inside a selection area whose position is fixed and non-selected items displayed outside the selection area are displayed at predetermined intervals. be. In the display control method, when the selected item is the first item and the amount of operation is less than the threshold value, the item list is made to follow the amount of operation within the range in which the selected item is maintained as the first item. and stepwise scrolling the item list when the operation amount exceeds the threshold value in a state where the selected item is the first item. and executing a second control that generates a signal to change the selection item from the first item to a second item different from the first item.

According to the above aspect, by causing the arithmetic device to execute the above program, the above effects can be achieved.

1 image display system, 10 operation detection device, 11 touch pad, 20 display control device, 21 acquisition unit, 23 output unit, 24 storage unit, 25 calculation unit, 30 display device, 31 screen, 32 item list, 33 selection area, I1-I4 items.

Claims (7)

A display control device for controlling an image displayed on a screen,
an acquisition unit that acquires a signal that can identify the user's operation amount and operation direction;
a calculation unit that generates a signal for controlling an image displayed on the screen based on the operation amount specified by the signal acquired by the acquisition unit;
An output unit for outputting the signal generated by the calculation unit to the outside,
displaying an image showing an item list including selected items displayed inside a position-fixed selection area and non-selected items displayed outside the selection area on the screen;
The calculation unit is
when the selected item is the first item and the manipulated variable is less than a threshold value, the item list follows the manipulated variable within a range in which the selected item is maintained at the first item. Execute a first control that generates a signal for linear scrolling,
When the operation amount exceeds the threshold amount while the selection item is the first item, the selection item is changed from the first item to the first item by scrolling the item list step by step. A display control device that executes a second control that generates a signal to change to a second item different from the display control device. The calculation unit is
In the first control, generating a signal for scrolling the item list in a specific direction according to the operation direction;
2. The display control device according to claim 1, wherein in said second control, a signal for scrolling said item list step by step in said specific direction is generated. 3. The display control device according to claim 1, wherein said selected items and said non-selected items included in said item list include character information. a display control device according to any one of claims 1 to 3;
an operation detection device connected to the acquisition unit and configured to output a signal capable of specifying the operation amount and the operation direction to the acquisition unit;
and a display device that is connected to the output unit and displays an image displayed on the screen according to a signal output from the output unit. 5. The image display system according to claim 4, wherein said operation detection device and said display device are arranged at positions separated from each other. 6. The image display system according to claim 4, wherein said image display system is mounted on a mobile object. A program for causing an arithmetic device to execute a display control method for controlling an image displayed on a screen,
displaying an image showing an item list including selected items displayed inside a position-fixed selection area and non-selected items displayed outside the selection area on the screen;
The display control method includes:
causing the item list to follow the operation amount within a range in which the selection item is maintained as the first item when the amount of operation by the user is less than a threshold amount in a state where the selection item is the first item; executing a first control that generates a signal for linearly scrolling through the
When the operation amount exceeds the threshold amount while the selection item is the first item, the selection item is changed from the first item to the first item by scrolling the item list step by step. and executing a second control that generates a signal to change to a second item different from.

Images