JPH1152941A - In-vehicle data communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display various graphics adapting for the number of pixels of a display device owned jointly by plural different display server devices by converting standard display indication information so as to adapt for screen information of a display server device of a destination and transmitting it. SOLUTION: Various graphics can be displayed adapting for the number of pixels of display devices 14, 24 owned jointly by plural different display server devices 10, 20 by converting standard display indication information by a display indication information converting section 34 so as to adapt for screen information of a display server devices 10, 20 of a destination, and transmitting it to the display sever devices 10, 20. Also, standard display indication information is converted so as to adapt for screen information of the display server device 10, 20 of a destination by converting to coordinate information being able to display after coordinate information is separated from shape information and coordinate information. Therefore, coordinate information can be converted adapting for the number of pixels of the display devices 14, 24 owned by the display sever devices 10, 20, consequently, various graphics can be displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle data communication system, and more particularly, to an in-vehicle data communication system in which a display client device specifies and transmits coordinates and a shape to a display server device to obtain various display figures. The present invention relates to a communication system.

[0002]

2. Description of the Related Art Conventionally, as an on-vehicle data communication system, as shown in FIG. 17, a display server device 110 having a display device 114 and a display client device 130 having display instruction information are connected via a communication bus. What is known is.

In the display client device 130, display instruction information from the data transfer control unit 131 is transmitted to the display server device 110. On the other hand, in the display server device 110, the received display instruction information is analyzed by the display control unit 113 and displayed. By displaying the information on the device 114, a plurality of display instruction information from the plurality of display client devices 130 can be displayed on the display device 114.
It is displayed above.

For example, the display device 114 has a standard size screen having an aspect ratio of 4: 3. Specifically, the display device 114 is composed of 320 pixels in the horizontal direction and 240 pixels in the vertical direction. It has a coordinate system as an origin.

[0005] Here, as display instruction information from the display client device 130, CIRCLE, X coordinate, Y coordinate,
The display instruction information for drawing a circle in a format such as a radius is transmitted.

For example, to draw five circles, CIRCLE, 160, 120, 96 CIRCLE, 40, 40, 40 CIRCLE, 280, 40, 40 CIRCLE, 40, 200, 40, CIRCLE, 280, 200, The display client device 130 displays the display instruction information indicated by reference numeral 40.
To the display server device 110, the display shown in FIG. 18 is obtained.

As described above, the vehicle-mounted data communication system also specifies and transmits coordinate information and shape information from the display client device 130 to the display server device 110 when drawing a straight line or a polygon. Has the advantage that various display figures can be obtained.

[0008]

However, in such an in-vehicle data communication system, a display instruction is stored in the display instruction information holding unit 135 in accordance with display coordinates depending on the display device 114 of the display server device 110. Information is kept. That is, the display client device 130 transfers the display instruction information held in the display instruction information holding unit 135 to the display server device 110 as it is, and displays it on the display device 114 of the display server device 110.

For this reason, when the display device 114 of the display server device 110 is changed to, for example, a wide screen which is long in the horizontal direction and the number of display pixels in the vertical and horizontal directions is the same as that of the standard size display device, As shown in FIG. 19 (a), the image is stretched in the horizontal direction and displayed. When a conventional display image is deformed and displayed according to an operator's instruction as in a general wide-screen television, the image is displayed on the screen using the following three display modes.

That is, as shown in FIG. 19A, a screen having an aspect ratio of 4: 3 with respect to the standard size is stretched to fill the entire screen and displayed in full size. Also, as shown in FIG. 19B, normal display is performed as it is with the center position adjusted with respect to the standard size screen. As shown in FIG. 19C, the horizontal size is enlarged and displayed so as to fill the horizontal direction of the wide screen.

However, when such a display mode is used, there is a problem that the operator needs to select the most easy-to-view display mode in accordance with the displayed content every time. Further, in the full size display shown in FIG. 19A, there is a problem that the displayed graphic is stretched in the horizontal direction, and as a result, the displayed graphic is distorted. Further, in the normal display shown in FIG. 19B, there is a problem that a non-display portion is formed on the left and right, and a wide screen cannot be utilized. FIG. 19 (c)
In the zoom display shown in (1), there is a problem that a graphic portion not displayed in the vertical direction occurs.

Further, when the display instruction information held by the display client device is created according to the wide screen, for example, a first display server device having a standard display device on a communication bus, and a wide format display device However, when the second display server device having the standard display device exists, the first display server device having the standard display device has a problem in that display failure occurs.

The present invention has been made in view of the above,
It is an object of the present invention to provide an in-vehicle data communication system capable of displaying various figures according to the number of pixels of a display device included in a plurality of different display server devices.

[0014]

According to the first aspect of the present invention,
In order to solve the above problem, a plurality of display server devices having a display device and a display client device for instructing display contents to the display server device are connected via a communication bus, and the display server device is connected to the display server device. An in-vehicle data communication system for transmitting display instruction information to a device and displaying various figures, wherein the display server device displays screen information indicating the number of horizontal and vertical pixels that can be displayed on the display server device. First display means for transmitting to a client device, the display client device comprising: display instruction information holding means for storing a plurality of display instruction information adapted to standard screen information; and screen information of a plurality of display server devices Screen information holding means for storing the display instruction information from the display instruction information holding means, and a destination display server device for holding the standard display instruction information in the screen information holding means And summarized in that a second transmitting means for transmitting the display instruction information converting means for converting to accommodate screen information, the display instruction information after converting into the display server device.

According to a second aspect of the present invention, in order to solve the above problem, the display instruction information converting means separates the coordinate information that can be displayed after separating the coordinate information from the shape information and the coordinate information included in the display instruction information. The gist is to convert to information.

According to a third aspect of the present invention, in order to solve the above-mentioned problem, the display instruction information converting means, when the screen information in one of the horizontal and vertical directions is the same, the coordinates only in the other direction. The gist is to convert information.

According to a fourth aspect of the present invention, in order to solve the above-mentioned problem, the display instruction information held by the display instruction information holding means includes one piece of coordinate information and at least one or more shape information. That is the gist.

[0018]

According to the first aspect of the present invention, the display server device transmits screen information indicating the number of pixels in the horizontal and vertical directions that can be displayed on the display server device to the display client device. A plurality of display instruction information adapted to the standard screen information is stored, and the screen information of the plurality of display server devices is held. Here, by converting the standard display instruction information to adapt to the screen information of the destination display server device and transmitting the converted display instruction information to the display server device, a plurality of different display server devices have Various graphics can be displayed according to the number of pixels of the display device.

According to the second aspect of the present invention, after the coordinate information is separated from the shape information and the coordinate information contained in the display instruction information, the coordinate information is converted into displayable coordinate information, thereby providing a standard display. Since the instruction information is converted so as to adapt to the screen information of the display server device of the transmission destination, the coordinate information can be converted according to the number of pixels of the display device of the display server device. Can display various figures.

According to the third aspect of the present invention, when the screen information in one of the horizontal and vertical directions is the same,
By converting the coordinate information only in the other direction, the coordinate information can be converted according to the number of pixels of the display device included in the display server device, and as a result, various figures can be displayed.

According to the present invention, a variety of figures can be represented by constructing display instruction information from one piece of coordinate information and at least one or more pieces of shape information. , Can display various figures.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 is a diagram showing a configuration of an in-vehicle data communication system according to an embodiment of the present invention.
As shown in FIG. 1, a first display server device 10, a second display server device 20, and a display client device 30 are connected via a communication bus.

First, the first display server device 10 comprises a data transfer control unit 11, a display device information holding unit 12, a display control unit 13, a display device 14, and an operation unit 15.

The display device 14 is attached to, for example, a center console of a vehicle with a wide screen and is used for displaying information on a driver's seat and a passenger seat. The display device information holding unit 12 holds information for a wide screen, and holds screen information having a screen size of 400 pixels in the horizontal direction and 240 pixels in the vertical direction. The data transfer control unit 11 transmits and receives data to and from the display client device via the communication bus. The display device information holding unit 12 holds the node ID of the first display server device 10 and screen information indicating the number of pixels of the display device 14 in the horizontal and vertical directions. Display control unit 13
Analyzes the display instruction information received from the display client device 30 and displays it on the display device 14. The operation unit 15
The operation of the driver or the passenger is input.

Next, the second display server device 20 comprises a data transfer control unit 21, a display device information holding unit 22, a display control unit 23, a display device 24, and an operation unit 25. The display device 24 is mounted on a standard screen for a rear seat and used to display information. The display device information holding unit 22 holds information for a standard screen, and holds screen information having a screen size of 320 pixels in the horizontal direction and 240 pixels in the vertical direction. The functions of the other units are the same as the functions of the first display server device 10, and the description thereof will be omitted.

Note that the display device information holding units 12 and 22
When the display server device is connected to the communication bus, the node I
D to the display client device 30 via the communication bus, and also displays screen information on the display client device 30.
To send to.

Next, the display client device 30 comprises a data transfer control unit 31, a display device information holding unit 33, a display instruction information conversion unit 34, and a display instruction information holding unit 35. The display instruction information holding unit 35 holds, for example, information on a display screen for operating the air conditioner. The data transfer control unit 31 transmits and receives data to and from the first and second display server devices 10 and 20 via a communication bus. The display device information holding unit 33 includes the first and second display server devices 1.
It holds the node IDs received by the data transfer control unit 31 from 0 and 20 via the communication bus and screen information indicating the number of pixels in the horizontal and vertical directions of the display devices 14 and 24. The display instruction information conversion unit 34 converts the display instruction information held in the display instruction information holding unit 35 into display instruction information corresponding to the display server device of the transmission destination.

Next, a basic communication format of data transferred on the communication bus will be described with reference to FIG. In the figure, the transmission source ID (S
ID), then a destination ID (DID) specifying the receiving device, a data length (DLEN) indicating the length of the data to be communicated, and finally the actual communication Communication data (DATA) representing the contents is arranged and configured.

The structure of communication data to be communicated is basically constituted by display instruction information and a parameter string as shown in FIG. 3, but differs depending on the contents of communication. In the parameter string, a plurality of parameters are arranged by being separated by delimiters.

Next, the display instruction information communicated and its format will be described with reference to FIG. As shown in FIG.
The shape information of each display instruction information is shown using bold characters, then parameters separated by commas “,” are arranged, and then coordinate information is arranged. First, line L10
Then, the display instruction information of the display device information is transmitted from the first or second display server device to the display client device 30. In this case, the number of pixels WIDTH in the horizontal direction and the number of pixels HEIGHT in the vertical direction of the display device are sent as parameters.

Next, the line L20 is display instruction information for requesting transmission of the display instruction information held in the display instruction information holding unit 35 of the display client device 30 by designating the data number N0. Next, in the line L30, the display instruction information for the subsequent drawing is
This is a drawing reference point instruction command for specifying a drawing reference point. Parameter X indicates horizontal reference coordinates, and parameter Y indicates vertical reference coordinates.

Next, a line L40 is display instruction information for drawing a rectangle. X1 and Y1 indicate upper left coordinates with respect to the drawing reference point, and X2 and Y2 indicate lower right coordinates with respect to the drawing reference point. Next, a line L50 is display instruction information for drawing a circle. X and Y indicate the coordinates with respect to the center drawing reference point, and R indicates the radius of the circle to be drawn.

Next, a line L60 is display instruction information for drawing a straight line. X1 and Y1 indicate the coordinates of the start point with respect to the drawing reference point, and X2 and Y2 indicate the coordinates of the end point with respect to the drawing reference point. Next, a line L70 is display instruction information for drawing a polygon. N indicates the number of vertices of the polygon to be drawn. X1, Y1 to XN, YN indicate relative coordinates of each vertex from the drawing reference point.

Next, a line L80 is display instruction information for drawing a character string. X and Y indicate the upper left coordinates of the character string to be drawn. STRING specifies a character string to be drawn by a character code. Next, a line L90 is display instruction information for drawing an image of a determined pattern. X and Y indicate the upper left coordinates of the image to be drawn. NO designates the determined pattern number. In addition,
The display instruction information shown in each line described above is a part of the representative display instruction information.

Next, the display client device 3 shown in FIG.
The operation in which the display client device 30 displays an image on the display server device will be described with reference to a flowchart showing the data transfer control of 0. First, step S510
Then, the display client device 30 uses the data transfer control unit 31 to determine whether or not there is reception from the communication bus. If there is a reception from the communication bus, the process proceeds to step S520. On the other hand, when there is no reception from the communication bus, the process proceeds to step S570.

Next, in step S520, the above-described S
It is determined whether an ISE command has been received. SIZE
If a command has been received, the process proceeds to step S530.
On the other hand, if it is not a SIZE command, step S5
Proceed to 40. Next, in step S530, the WIDTH and HEIGHT following the SIZE command are stored in the display device information holding unit 3 together with the transmission source ID of the display server device.
Hold at 3.

Next, in step S540, the above-described S
It is determined whether an ELECT command has been received. SE
If the LECT command has been received, step S550
Proceed to. On the other hand, if it is not a SELECT command, the process proceeds to step S560.

In step S550, the number NO following the SELECT command and the transmission source ID are used as parameters.
A process for transmitting the display instruction information is performed. That is, for the display instruction information held in the display instruction information holding unit 35,
The data number N0 is designated and read, and the data is transmitted from the data transfer control unit 31 to the designated display server device via the communication bus.

On the other hand, in step S560, other processing is performed. Here, when there is no reception from the communication bus,
In step S570, data transfer control unit 31 determines whether or not there is transmission processing of display instruction information. If there is a transmission process of the display instruction information, the process proceeds to step S580.
On the other hand, when there is no transmission processing of the display instruction information, the process returns to step S510. In step S580, the data transfer control unit 31 transmits the data to the designated display server device via the communication bus.

Next, the display instruction information holding unit 3 will be described with reference to FIG.
The format of the display instruction information stored in No. 5 will be described. The display instruction information is composed of a plurality of information blocks. A number NO for identification is assigned to the head of each information block, and a plurality of pieces of display instruction information in a format according to the communication format shown in FIG. 2 are sequentially stored. For example, for a control device of an air conditioner, appropriate display instruction information is changed and held at any time according to an operating state such as a set temperature or a room temperature of the air conditioner. Therefore, it is not fixedly held in the display client device.

Next, the display device information holding unit 1 will be described with reference to FIG.
The format of the display device information held in 2, 22, and 33 will be described. Display device information holding unit 1 of display server device
Each of the sets 2 and 22 holds a node ID of the device and information on the width and height of the screen of the display device. As shown in FIG. 7, for example, the first
The display server device 10 has 130 as the node ID, 400 as the number of pixels in the horizontal direction of the display device 14, and 240 as the number of pixels in the vertical direction as screen information.
Next, the display device information holding unit 22 stores 140 as the node ID of the second display server device, 320 as the number of pixels in the horizontal direction of the display device 24, and 24 as the number of pixels in the vertical direction.
0 is held as screen information. As shown in FIG. 7, the display device information holding unit 33 of the display client device 30 holds, for example, node IDs of both the display server devices 10 and 20 and width information and height information of the screen of the display device. I have.

Next, the operation when the display client device transmits the display instruction information will be described with reference to FIG. First, in step S810, the information block of the designated number is extracted. Next, in step S820,
The first display instruction information of the information block is extracted.

Here, in step S830, it is determined whether or not the display instruction information is a drawing reference point instruction command.
If the command is a drawing reference point instruction command, the process proceeds to step S840. On the other hand, if the command is not a drawing reference point instruction command, the process proceeds to step S850.

Next, in step S840, a coordinate conversion process of the display instruction information is performed, and the flow advances to step S850. Next, in step S850, the display instruction information after the conversion is transmitted to the display server device. Next, in step S860, it is determined whether the processing of the last display instruction information has been completed. When the processing of the last display instruction information is completed, the present processing is completed. On the other hand, if the processing of the last display instruction information has not been completed, the process proceeds to step S870. next,
In step S870, the next display instruction information is extracted, and
It returns to step S830.

Here, the conversion processing in step S840 shown in FIG. 8 will be described. First, with reference to the display device information corresponding to the node ID of the display server device, the width information and the height information of the display screen are extracted and substituted into WIDTH and HEIGHT, respectively.

Next, for the parameter values X and Y of the drawing reference point instruction command, a new X
When NEW and YNEW are obtained, XNEW = X * WIDTH / 320 YNEW = Y * HEIGHT / 240 Here, the obtained XNEW and YNEW are replaced with the original X and Y, and a conversion process is performed. Note that when the number of pixels in the vertical direction of the display device is, for example, 240 pixels, it is not necessary to perform the conversion process, and thus the conversion process may be performed only in the horizontal direction.

Hereinafter, an operation example of an actual vehicle-mounted communication system will be described. First, the operation will be described with reference to an example of an information block shown in FIG. With this information block, the display shown in FIG. 10 is performed on a standard display device.
Here, SELECT, 100 is transmitted from the first display server device 10 as display instruction information, and the display client device 3 is transmitted via the communication bus.
0, the drawing reference point instruction command in the information block shown in FIG. 9 is converted by the display instruction information conversion unit 34 as shown in FIG.
Are sequentially transmitted. As a result, the image is displayed on the display device of the display server device as shown in FIG.

Similarly, SELECT, 100 is transmitted as display instruction information from the second display server device 20, and the display client device 3 is transmitted via the communication bus.
0, the information block shown in FIG.
It is converted by the display instruction information conversion unit 34. However, since the drawing reference point instruction command does not change as a result, the display device 24 of the second display server device 20 includes
It is displayed as shown in FIG.

Next, the display by the information block shown in FIG. 13 will be described. In this example, a plurality of drawing elements are grouped to form one shape and drawn. This information block is displayed on a standard display device as shown in FIG.

Here, SELECT, 200 is transmitted from the first display server device 10 as display instruction information, and the display client device 3 is transmitted via the communication bus.
When the information block is received as 0, the information block shown in FIG. 13 is converted by the display instruction information conversion unit 34 into a drawing reference point instruction command as shown in FIG. Display server device 10
Are sequentially transmitted. As a result, a display as shown in FIG. 16 is displayed on the display device 14 of the display server device 10.

When SELECT, 200 is transmitted as the same display instruction information from the second display server device 20, the information block shown in FIG. However, since the drawing reference point instruction command does not change as a result, the display device 24 of the second display server device displays FIG.
Is displayed as shown.

As described above, the standard display instruction information is converted by the display instruction information conversion unit 34 so as to be adapted to the screen information of the destination display server device, and the converted display instruction information is transmitted to the display server device. Accordingly, various graphics can be displayed according to the number of pixels of the display devices 14 and 24 included in the plurality of different display server devices 10 and 20.

Further, after the coordinate information is separated from the shape information and the coordinate information included in the display instruction information, the coordinate information is converted into displayable coordinate information, so that the standard display instruction information is displayed on the screen of the display server device of the transmission destination. Since the conversion is performed so as to adapt to the information, the coordinate information can be converted according to the number of pixels of the display devices 14 and 24 included in the display server devices 10 and 20, and as a result, various figures are displayed. be able to.

When the screen information in one direction is the same in the horizontal and vertical directions, the display instruction information conversion unit 34 converts the coordinate information in only the other direction, so that the display server 1
The coordinate information can be converted according to the number of pixels of the display devices 14 and 24 included in 0 and 20, and as a result, various figures can be displayed.

Further, by forming the display instruction information from one piece of coordinate information and at least one or more shape information, various figures can be represented, and as a result, various figures can be displayed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an in-vehicle data communication system according to an embodiment of the present invention.

FIG. 2 is a diagram showing a communication basic format of data transferred on a communication bus.

FIG. 3 is a diagram illustrating a configuration of communication data.

FIG. 4 is a diagram for explaining a format of display instruction information.

FIG. 5 is a flowchart illustrating data transfer control of the display client device.

FIG. 6 is a diagram for explaining a format of display instruction information held in a display instruction information holding unit.

FIG. 7 is a diagram for describing a format of display device information held in a display device information holding unit.

FIG. 8 is a flowchart illustrating an operation when the display client device performs a transmission process of display instruction information.

FIG. 9 is an example of an information block.

10 is a display example when the example of the information block shown in FIG. 9 is displayed on a standard display device.

FIG. 11 shows a command in a case where a drawing reference point instruction command in the information block shown in FIG. 9 is converted by using a display instruction information conversion unit.

FIG. 12 is a display example displayed on the display device of the display server device.

FIG. 13 is an example of an information block.

FIG. 14 is a display example when the example of the information block shown in FIG. 13 is displayed on a standard display device.

FIG. 15 shows a command in a case where the drawing reference point instruction command in the information block shown in FIG. 13 is converted by using the display instruction information conversion unit.

FIG. 16 is a display example displayed on the display device of the display server device.

FIG. 17 is a diagram showing a system configuration of a conventional in-vehicle data communication system.

FIG. 18 is a display example when displayed on a standard display device.

FIG. 19 illustrates a full-size display example (a), a normal display example (b), and a zoom display example (c) displayed on the display device.

[Description of Signs] 10, 20 display server device 14, 24 display device 30 display client device 34 display instruction information conversion unit

Claims (4)

[Claims] 1. A display server device having a display device, and a display client device for instructing display contents to the display server device are connected via a communication bus, and from the display client device to the display server device. An in-vehicle data communication system that transmits display instruction information and displays various graphics, wherein the display server device displays screen information indicating the number of horizontal and vertical pixels that can be displayed on the display server device. The display client device has a first transmission means for transmitting the display instruction information, the display client device stores a plurality of display instruction information adapted to standard screen information, and the display client device holds screen information of a plurality of display server devices. Screen information holding means to perform standard display instruction information from the display instruction information holding means, and the screen information of the destination display server device held by the screen information holding means. A vehicle-mounted data communication system, comprising: display instruction information conversion means for converting the display instruction information so as to be adapted to the information; and second transmission means for transmitting the converted display instruction information to the display server device. 2. The display instruction information converting means, after separating coordinate information from shape information and coordinate information included in the display instruction information, converts the coordinate information into displayable coordinate information. In-vehicle data communication system. 3. The display instruction information converting means, when the screen information in one of the horizontal and vertical directions is the same, converts the coordinate information only in the other direction. 2. The in-vehicle data communication system according to 2. 4. The in-vehicle data according to claim 1, wherein the display instruction information held in the display instruction information holding means is composed of one coordinate information and at least one or more shape information. Communications system.