JP2007210462A - Display control device for vehicle and display system for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display control device for a vehicle and a display system for the vehicle which are excellent in drivability and contribute to safe operation while securing the visibility of a display device from a driver and a passenger. <P>SOLUTION: The display control device 1 for the vehicle limits the amount of visual information which is displayed on the display device 2 mounted to the vehicle at least in accordance with the speed information of the vehicle 3 by a control means 21. As a method of limitation, the display information displayed on the display device 2 is to be made a simple indicator chart (b) which is different from a normal indicator chart (a) in accordance with speed information. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle display control device and a vehicle display system that switch display contents displayed on a display device mounted on a vehicle.

  A display device using a liquid crystal panel for displaying various information is mounted on the vehicle. This display device displays various information about the vehicle, if the car navigation system is installed, the information, and if a recording medium playback device such as a DVD is provided, A playback image is displayed. Since display devices are required to have display performance for displaying information such as maps, characters, and images, the screen resolution is increasing year by year.

  Against this background, in recent years, an environment for connecting to the Internet has been prepared even from a vehicle, and a display device is also used as the display screen. However, the Internet screen (hereinafter referred to as “web browsing screen”) is used. ), The absolute size of the displayed character size depending on the resolution of the display device may not be appropriate for viewing in a vehicle environment. In addition, since the visual field of the driver becomes narrower as the speed increases and it is difficult to see if the characters displayed on the display screen are small, Patent Document 1 changes the size of the characters displayed on the display screen according to the speed. Has been proposed.

JP-A-9-237039

  When the display device is improved in resolution (for example, 320 × 240 → 640 × 480), if the display area (screen size) is the same, the area that can be displayed on one screen is widened, but the absolute size per character is large. Becomes smaller. For this reason, it is possible for a driver or other passengers to continue to stare at small characters in a car running with vibration, which may cause physiological distress.

  If it is enlarged to a character size that is easy to read, the above problem will be reduced, but in this case, if the image resolution is reduced, the number of characters that can be displayed on one screen will be reduced, and the entire screen such as a web browsing screen with a large amount of information will be displayed. The layout becomes difficult to grasp, and the display screen is difficult for passengers other than the driver to see. Although changing the character size according to the speed as in Patent Document 1 is also a proposal, this is useful for drivers such as destinations and is effective when there is little display information, but web browsing There is no direct relationship with driving like a screen, and if there is a lot of text information, browsing by the driving driver may be induced and an unsafe situation may occur.

  It is an object of the present invention to provide a vehicle display control device and a vehicle display system that are excellent in drivability and contribute to safe driving while ensuring the visibility of the display device from a driver or a passenger. .

  In order to achieve the above object, a display control apparatus for a vehicle according to the present invention has control means for limiting the amount of visual information displayed on a display device mounted on a vehicle according to at least speed information of the vehicle. It is said.

In the vehicle display control device according to the present invention, the control means is characterized in that the display information displayed on the display device is a simple display different from the normal display according to the speed information.
In the vehicle display control device according to the present invention, the simple display is characterized in that the characters displayed during normal display are displayed on the display unit of the display device in a state where the characters cannot be read.

  In the vehicle display control apparatus according to the present invention, the control means increases the size of the character to be switched from normal display to simplified display as the speed information increases.

  In the vehicle display control device according to the present invention, the control means changes the character size to be switched from the normal display to the simple display according to the display screen size of the display device.

  In the vehicle display control device according to the present invention, the control means changes the character size to be switched from normal display to simplified display according to the resolution of the display screen of the display device.

  In the vehicle display control device according to the present invention, the control means changes the character size to be switched from normal display to simple display according to the installation location of the display device.

  In the vehicle display control apparatus according to the present invention, the control means changes the character size to be switched from the normal display to the simple display according to the seat position of the vehicle.

  A vehicle display system according to the present invention includes the vehicle display control device according to any one of the above and a display device that displays a screen controlled by the vehicle display control device.

  According to the present invention, the amount of visual information displayed on the display device mounted on the vehicle is limited according to at least the speed information of the vehicle, specifically, a simple display different from the normal display is provided. This reduces the number of drivers trying to see the information displayed on the display screen, improving drivability and contributing to safe driving. Further, even when a passenger views a screen with a large amount of information displayed on the display device while traveling, the layout of the entire display can be grasped on the screen, and visibility can be ensured.

  According to the present invention, since the simple display displays characters that are normally displayed on the display unit of the display device in a state where it cannot be read, the driver who is driving is particularly an act of trying to see the information displayed on the display screen. Can be reduced and contribute to safe driving.

  According to the present invention, since the character size to be switched from the normal display to the simple display is increased as the speed information is increased, the simplified display that cannot be recognized even by a larger character as the field of view is narrowed is displayed on the display screen. The act of trying to view the information is further reduced, which can contribute to safe driving.

  According to the present invention, since the character size to be switched from normal display to simplified display is changed according to the display screen size of the display device, even if the display device is changed to a different size, the simplified corresponding to the screen It is possible to display and reduce the action of the driving driver trying to see the information displayed on the display screen, improve drivability, contribute to safe driving, and display device while passengers are driving Even when viewing a screen with a large amount of information displayed on the screen, it is possible to grasp the layout of the entire display on the screen and to ensure visibility.

  According to the present invention, since the character size to be switched from normal display to simplified display is changed according to the resolution of the display screen of the display device, even if the resolution of the display device is changed, the simplified corresponding to the screen It is possible to display and reduce the action of the driving driver trying to see the information displayed on the display screen, improve drivability, contribute to safe driving, and display device while passengers are driving Even when viewing a screen with a large amount of information displayed on the screen, it is possible to grasp the layout of the entire display on the screen and to ensure visibility.

  According to the present invention, the character size to be switched from the normal display to the simple display is changed according to the installation location of the display device, so that a simple display according to the installation position of the display device can be performed, and the driver in operation Screens with a large amount of information displayed on the display device while traveling by passengers while reducing the number of attempts to view information displayed on the display screen, improving drivability, contributing to safe driving When viewing the video, it is possible to grasp the layout of the entire display on the screen and to ensure visibility.

  According to the present invention, the character size to be switched is changed from the normal display to the simple display according to the seat position of the vehicle, so that the simple display according to the distance between the display device and the seat position can be performed, and the driver during driving The act of trying to see the information displayed on the display screen is reduced, drivability is improved, it can contribute to safe driving, and the amount of information displayed on the display device while the passenger is traveling Even when viewing the screen, the layout of the entire display on the screen can be grasped, and visibility can be ensured.

  According to the present invention, the screen displayed on the display device by the vehicle display control device is changed from a normal screen to a simple display according to vehicle speed information, display screen size, screen resolution, display device position, and seat position. Since the amount of information is limited, the number of actions that a driving driver tries to see the information displayed on the display screen is reduced, driving performance is improved, contributing to safe driving, and passengers can drive Even when viewing a screen with a large amount of information displayed on the display device, the layout of the entire display can be grasped on the screen, and visibility can be ensured.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, the code | symbol 1 shows the display system for vehicles. The vehicle display system 1 includes a vehicle display control device 20 and a display device 2 on which a screen controlled by the vehicle display control device 20 is displayed.

  The display device 2 is a liquid crystal display monitor, and as shown in FIG. 2, is disposed in front of the center console 4 located between the driver's seat and the passenger seat of the vehicle 3, and the driver seat and the passenger seat side. The display unit 2a can be viewed. As shown in FIG. 3, the display device 2 is configured so that the resolution of the display unit 2a can be changed. In this embodiment, the display device 2 is selectable / changeable to resolutions of 320 dots × 240 dots and 640 dots × 480 dots.

  Next, the relationship between the displayed character size and the display area due to the difference in screen resolution will be described. FIG. 3A shows one character displayed as 24 dots × 24 dots. When characters of this size are displayed on the display unit 2a having a screen resolution of 320 dots × 240 dots shown in FIG. 3B, 13 characters can be displayed. In contrast, when characters of the same size are displayed on the display unit 2a having a screen resolution of 640 dots × 480 dots shown in FIG. 3C, 26 characters can be displayed. That is, since the number of dots in the display screen increases, the number of characters that can be displayed increases, but the absolute size of the displayed characters decreases.

  4A shows a web screen 10 as a display screen displayed on the display unit 2a having a screen resolution of 640 dots × 480 dots, and FIG. 4B shows a display on the display unit 2a having a screen resolution of 320 dots × 240 dots. Each of the web screens 10 as the displayed screen is shown. The web screen 10 is a screen that is displayed when connected to the Internet. The vehicle 3 is equipped with a terminal device (not shown) that can be connected to the Internet, and the display device 2 is used as an output screen. . Generally, characters, graphics, and the like are displayed on the web screen 10, and another screen with a hyperlink is displayed when the user clicks on the graphics or the characters with a controller (not shown).

  For example, when such a web screen 10 is configured to display the entire screen with a screen resolution of 640 dots × 480 dots as shown in FIG. 4A, the screen resolution is reduced because the character size is small. If an attempt is made to increase the character size, only a part of the web screen 10 is displayed as shown in FIG. 4B, and the entire screen layout cannot be seen.

  If the characters are small like this, it is difficult for the driver to see and the screen tends to be watched. From the passenger's point of view, if the character size is displayed large, the layout of the entire screen cannot be grasped and the usability is deteriorated. While the vehicle 3 is traveling, the field of view of the occupant becomes narrower as the speed increases, and it is difficult to ensure both visibility and safety by simply changing the screen resolution.

  Therefore, in the vehicle display system 1 shown in FIG. 1, the screen displayed on the display unit 2 a of the display device 2 is displayed on the normal display shown in FIGS. 5 (a) and 6 (a) using the vehicle display control device 20. The screen can be changed to the simple display shown in FIGS. 5B and 6B according to the vehicle speed information, the display screen size, the screen resolution, and the position of the display device 2, and the amount of visual information can be changed. . The simple display refers to a state in which characters that are normally displayed on the display unit 2a of the display device 2 are displayed in an unreadable state.

The vehicle display control device 20 is composed of a main part of a known computer.
A vehicle speed sensor 22, a screen size input means 23, an installation position vitality means 24, a resolution input means 25, and a seat position input means 26 are electrically connected to the vehicle display control device 20. From the vehicle speed sensor 22, the vehicle speed information of the vehicle 3, from the screen size input means 23, the screen size information of the display device 2, from the installation position input means 24, the set position information of the display device 2 in the vehicle interior, from the resolution input means 25 The screen resolution information and the seat position input means 26 are configured to input seat position information.

  The screen size input means 23 is provided on the assumption that the display device 2 has a range of types such as its screen size (for example, 5.6 to 8 inches) and is changed from the initial screen size. That's it. Of course, if the screen size is different, even if the resolution is the same, the displayed image area is physically different and the character size is also different, which also affects the visibility of the occupant.

  The installation position input means 24 is provided because the installation position of the display device 2 may be installed on the center console 4 or the dashboard 5 as shown in FIG. This is because the distance to the passenger is different and affects visibility.

  The seat position input means 26 is provided because the distance between the display device 2 and the occupant differs depending on the position of the seat and affects the visibility. The seat position may be appropriately input by operating the seat position input means 26. For example, the seat slides in the front-rear direction, the angle of the backrest, the height of the seat surface, etc. is driven by a motor or the like. In the case of a seat that is electrically driven using a power source, these positions may be detected by a sensor or the like, and the values stored in a memory may be used.

  The reason why the resolution input means 25 is provided is that, as described with reference to FIG. 4, the size displayed on the display unit 2a differs depending on the resolution even if the character size is the same. The reason for using the speed information is that the relationship between the speed and the visual field is taken into consideration.

  In this embodiment, the switching control from the normal display to the simple display and the switching character size to be the simple display are set according to the vehicle speed information, the display screen size information, the screen resolution information, the display device position information, and the seat position information. It is stored / set in advance in the image switching means 21 serving as the control means of the vehicle display control device 20. In this embodiment, the screen displayed on the display device 2 is controlled using these parameters. However, since the field of view narrows as the speed increases, in consideration of safety, the display screen is normally displayed using at least speed information as a parameter. The control mode may be simple display.

  As a control mode by the vehicle display control device 20, when speed information is used as a parameter, a predetermined speed is set in advance in the image switching means 21 as a reference value, and information input from the speed sensor 22 is the reference value. If it exceeds, normal display may be changed to simple display. Alternatively, a switching character size may be set for each constant speed interval, and the character size that is simply displayed may be increased as the speed is listed. In other words, although displayed on the display unit 2a, the character size is not limited to the same size (the same number of dots), and considering that the field of view becomes narrower as the speed increases, the character size can be read. It is preferable for the driver not to watch the display unit 2a.

  Next, normal display and simple display will be described with reference to FIGS. FIG. 5 shows a top screen (web screen) 10 of a home page displayed on the display unit 2a of the display device 2, and FIG. 6 shows a weather forecast web screen 30 displayed on the display unit 2a of the display device 2. .

In FIG. 5, reference numerals 101, 102, and 103 are areas configured by character information, and reference numeral 104 indicates an area configured by graphic information and character information configured by figures and photographs. In FIG. 6, reference numeral 301 denotes an area where character information of a character size that is not a switching target is displayed, and reference numerals 302 and 303 denote areas where images and characters are displayed. Reference numerals 304 and 305 indicate only the image area. The normal display indicates a state in which characters are displayed in all areas on the cover 2a as shown in FIGS. 5 (a) and 6 (a). . The simple display indicates a state in which the character portions of the areas 101, 102, 103, and 104 and the areas 302 and 303 are displayed with “·” as shown in FIGS. 5B and 6B. Although the area 301 in FIG. 6 is a character area, it is displayed in the simplified display in FIG. 6B because there is no problem in visibility even when the character size is displayed large.

  Next, a control flow by the vehicle display control device 20 will be described with reference to FIGS. FIG. 7 shows the initial setting process. In step R1, the screen size is input from the screen size input means 23. In step R2, the screen resolution is input using the resolution input means 25. In step R3, the setting position of the display device 2 is input using the installation position input means 24. In step R4, the seat position input means 26 inputs the seat position. Each of these pieces of information is stored in a memory (not shown) of the image switching means 21. In step R5, among the information inputted thereto, the display unit 2a is obtained from the screen size information, the screen resolution information, the installation position information, and the seat position information. The simple display switching character size L1 which is a threshold when the character size is switched in is calculated, the calculation result is stored in the memory, and the initial setting is completed.

  When the initial setting is completed, the computation vehicle display control device 20 executes a screen switching selection process shown in FIG. In this process, it is determined in step S1 whether or not the calculation of the simple display switching character size L1 has been completed. Here, since the calculation end flag is set when the calculation is completed in the above-described step R4, the presence or absence of this flag is determined in step S1. If there is a flag, the process proceeds to step S2 assuming that the character size calculation has been completed. If there is no flag, the process proceeds to step S4 assuming that the simple display switching character size L1 has not been calculated, and normal display is set. .

  In step S2, the speed information from the speed sensor 22 is compared with a preset reference value (switching speed information), and if the speed of the vehicle 3 is equal to or higher than the switching speed, the process proceeds to step S3 and simple display is set. When the speed of the vehicle 3 is less than the switching speed, the process proceeds to step S4 and the normal display is set.

  When the simple display is set, the calculation vehicle display control device 20 executes the simple display process shown in FIG. In this process, in step T1, a simple display switching character size L1 for simple display is derived and set from the information on the screen size, screen resolution, installation position, and seat position input in steps R1 to R4 in FIG. To do. In this embodiment, since the simple display switching character size L1 corresponding to these parameters is stored in advance, it is appropriately selected from this information. If the simple display switching character size L1 corresponding to the parameter is stored in advance, a memory capacity is required. Therefore, the simple display switching character size L1 may be calculated using these four parameters.

  In step T2, the simple display switching character size L1 derived and set in step T1 is compared with the character size information L, and the display character size L displayed on the display unit 2a is equal to or smaller than the simple display switching character size L1. In step T3, among the character information of each area (each area shown in FIGS. 5 and 6) displayed on the display unit 2a, the character font of the target display character size is switched to “•”. Proceed to step T4.

  In step T4, it is confirmed that all character checks for whether or not all the character fonts below the character size information L to be switched have been replaced with “•” are completed. The displayed screen is displayed on the display unit 2a. In step T2, if the display character size L is not less than or equal to the simple display switching character size L1, the simplified display of “.” Is not performed, and the process proceeds to step T4 where the completion of the replacement check for all characters is confirmed. After that, in step T5, the screen is displayed on the display unit 2a.

  That is, when the display size L displayed on the display unit 2a is equal to or smaller than the simple display switching character size L1, the areas 101, 102, 103, and 104 in FIG. 5B and the areas 302 and 102 in FIG. If the character information of 303 is displayed as “·” so as to be unreadable, and the display character size L displayed on the display unit 2a is not smaller than the simple display switching character size L1, an area 301 shown in FIG. The character information is displayed as legible character information. Note that the image information and the image areas 304 and 305 in FIGS. 5 and 6 are normally displayed without being replaced with “•”. In addition, since it is simply displayed character information and the form of the character displayed on the display unit is simply displayed as “•”, functions such as hyperlinks are enabled, so the occupant can hyperlink with the controller You can display the linked screen by clicking in the area where the function is set.

  As described above, the display screens 10 and 30 displayed on the display device 2 mounted on the vehicle according to the speed information of the vehicle 3 are different from the normal display shown in FIGS. 5A and 6A. 5 (b) and FIG. 6 (b) in which the amount is limited, the action of the driving driver trying to see the information displayed on the display unit 2a is reduced, and drivability is improved. It can improve and contribute to safe driving. Further, when the passenger views the screen with a large amount of information displayed on the display unit 2a while traveling, the layout of the entire display can be grasped on the screen, and visibility can be ensured. In addition, since the screen that is displayed in a simple manner is displayed in a state where the characters that are normally displayed cannot be read, the act of the driver who is driving especially tries to see the information displayed on the display unit 2a is reduced, which is safe. It can contribute to driving.

  By changing the simple display switching character size L1 from the normal display to the simple display as the speed information becomes higher, it is displayed as “•” that cannot be read even with a larger character size as the field of view becomes narrower. The act of looking at the information displayed on the part 2a is further reduced, which can contribute to safe driving.

  Depending on the display screen size and image resolution of the display device 2, the display device 1 is changed to a different size or the screen resolution is changed by changing the switching target character size L <b> 1 from normal display to simple display. Even in this case, since the simple display corresponding to the screen can be performed, the act of the driver trying to see the information displayed on the display unit 2a during driving is reduced, and drivability is improved, which contributes to safe driving. In addition, when the passenger views the screen with a large amount of information displayed on the display unit 2a during traveling, the layout of the entire display can be grasped on the screen, and visibility can be ensured.

  Since the character size to be switched from the normal display to the simple display is changed according to the distance between the display device 2 and the occupant, such as the installation location of the display device 2 and the seat position, the simple display according to the distance from the occupant And the driver trying to see the information displayed on the display unit 2a is reduced, the drivability is improved, and it is possible to contribute to safe driving. Even when viewing a screen with a large amount of information displayed on 2a, it is possible to grasp the layout of the entire display on the screen and to ensure visibility.

1 is a schematic configuration diagram of a vehicle display system according to an embodiment of the present invention. It is an enlarged view which shows the vehicle interior to which the display system for vehicles shown in FIG. 1 was applied, and one form of the installation position of a display apparatus. It is a figure which shows the relationship between the screen resolution of a display apparatus, and the size of the character displayed. It is a figure which shows the relationship between the screen resolution of a display apparatus, and the image area displayed. It is a figure which shows an example of the screen of the normal display displayed on the display part of a display apparatus, and the screen of a simple display. It is a figure which shows another example of the screen of the normal display displayed on the display part of a display apparatus, and the screen of a simple display. It is a flowchart which shows the content of the initial setting of the control implemented by this invention. It is a flowchart regarding the switching process of a normal display and a simple display. It is a flowchart regarding the simple display process when simple display is selected.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display system for vehicles 2 Display apparatus 3 Vehicle 20 Display control apparatus for vehicles 21 Control means

Claims (9)

  A vehicle display control device comprising control means for limiting the amount of visual information displayed on a display device mounted on a vehicle according to at least vehicle speed information. The vehicle display control device according to claim 1,
The display control device for a vehicle, wherein the control means changes display information displayed on the display device according to the speed information into a simple display different from a normal display. The vehicle display control device according to claim 2,
The vehicle display control device according to claim 1, wherein the simple display is displayed on the display unit of the display device in a state where characters displayed during normal display cannot be read. The vehicle display control device according to claim 3,
The vehicle display control apparatus, wherein the control means increases a switching target character size from normal display to simple display as the speed information increases. The vehicle display control device according to any one of claims 1 to 4,
The vehicle display control apparatus, wherein the control means changes a switching target character size from normal display to simple display according to a display screen size of the display device. The vehicle display control device according to any one of claims 1 to 4,
The vehicle display control device, wherein the control means changes a switching target character size from normal display to simple display according to a resolution of a display screen of the display device. The vehicle display control device according to any one of claims 1 to 4,
The vehicle display control device, wherein the control means changes a character size to be switched from normal display to simple display according to an installation location of the display device. The vehicle display control device according to any one of claims 1 to 4,
The vehicle display control device, wherein the control means changes a character size to be switched from normal display to simple display according to a seat position of the vehicle. A vehicle display system comprising: the vehicle display control device according to claim 1; and a display device on which a screen controlled by the vehicle display control device is displayed.

Images