JP5025414B2 - In-vehicle image display device - Google Patents

Description

  The present invention relates to an in-vehicle image display device that displays vehicle information such as a vehicle speed and an engine speed.

A vehicle-mounted display module that displays a speedometer or a tachometer on an organic EL panel is known as a conventional technique (for example, Patent Document 1). In this in-vehicle display module, images of a speedometer and a tachometer are created by the following two methods. One method prepares a large number of pointer data having different positions by a predetermined angle, reads the pointer data corresponding to the vehicle speed and the engine speed, and superimposes the read pointer data on the background image data. In another method, image data of the pointer at an angular position corresponding to the vehicle speed and the engine speed is created, and the created image data of the pointer is superimposed on the background image data.
JP 2006-248406 A

  The on-vehicle display module described in Patent Document 1 has a problem in that when a large number of pointer data having different positions by a predetermined angle is prepared, the amount of image data stored in advance in a ROM or the like increases. Further, when generating image data of the pointer at the angular position according to the vehicle speed or the engine speed, there is a problem that it takes time to create the image data.

(1) An in-vehicle image display device according to a first aspect of the present invention includes a display that displays an image related to a driving operation or a driving situation of a vehicle based on drawing data, a detection unit that detects vehicle information, and a display. First storage means for storing background image data as a background of a displayed image, and second storage for storing original image data of dynamic image data superimposed on background image data and dynamically changing according to vehicle information Based on the vehicle information detected by the detection means, the extraction means for extracting the dynamic image data from the original image data stored in the second storage means, and the background image data read from the first storage means And generating means for generating drawing data by superimposing the dynamic image data extracted by the means.
(2) The invention according to claim 2 is the third storage means in which the original image data of the dynamic image data stored in the second storage means is compressed and stored in the in-vehicle image display device according to claim 1. And decompression means for decompressing the original image data stored in the third storage means and storing it in the second storage means.
(3) The invention of claim 3 is the in-vehicle image display apparatus according to claim 1 or 2, wherein the first and second storage means store the original image data in a bitmap format.

  According to the present invention, since the display screen that is dynamically changed according to the vehicle information and presented to the occupant can be drawn quickly, the update time interval of the display screen can be shortened.

-First embodiment-
FIG. 1 shows an in-vehicle image display device 1 according to a first embodiment of the present invention. The vehicle-mounted image display device 1 can display the engine speed, output, and torque. The in-vehicle image display device 1 includes a control circuit 11, a ROM 12, a RAM 13, a display monitor 14, and an input device 15. The vehicle-mounted image display device 1 acquires vehicle information such as the engine speed, output, and torque from an unillustrated engine ECU (Electrical Control Unit).

  The control circuit 11 includes a microprocessor and its peripheral circuits, and performs various controls by executing a control program stored in the ROM 12 using the RAM 13 as a work area. In addition to the control program described above, the ROM 12 stores original image data (hereinafter referred to as original image data) for creating image data (hereinafter referred to as display image data) to be displayed on the display monitor 14. The format of the original image data is, for example, PNG (Portable Network Graphics).

  The RAM 13 stores display image data in a predetermined memory area. Further, the RAM 13 stores the decompressed original image data in another memory area. Display image data is appropriately generated in the control circuit 11. Details of the generation processing for generating display image data will be described later.

  The display monitor 14 includes a CRT, a liquid crystal display, an organic EL display, or the like. The display monitor 14 provides vehicle information such as engine speed, output, and torque to the user as a screen display. The input device 15 has operation keys that are operated by the user for setting various commands, and is realized by a button switch on the operation panel, a hard switch around the panel, or the like.

  Next, display image data generation processing according to the first embodiment of the present invention will be described with reference to FIGS. The vehicle-mounted image display device 1 according to the first embodiment of the present invention displays the engine speed, the engine output, and the engine torque on the display monitor 14.

  The vehicle-mounted image display device 1 of the present invention displays engine output and engine torque in color. FIG. 2 is a diagram for explaining display colors for displaying engine output and engine torque. Hereinafter, in FIG. 2, a diagram represented by reference numeral 20 is referred to as an output torque display color diagram. The display color of the engine output will be described. In the output torque display color diagram 20 of FIG. 2, the engine speed is 0 r. p. The display color for displaying the output of the engine at m is purple. As the engine speed increases, the display color for displaying the engine output is gradually changed from purple to blue, green, yellow, and orange. The engine speed is 7500 r. p. When m, the engine output is displayed in red. In other words, as the engine speed increases, the display color that displays the engine output gradually changes from purple, blue, green, yellow, orange, and red with a color gradient such as the spectrum of white light. To go.

  Next, display colors for displaying engine torque will be described. In the output torque display color diagram 20 of FIG. 2, the engine speed is 0 r. p. The display color for displaying the torque of the engine at m is purple. As the engine speed increases, the display color for displaying the engine output is gradually changed from purple to blue, green, yellow, and orange. The engine speed is 4600 rpm. p. When m, the engine output is displayed in red. The engine speed is 4600 r. p. When m is exceeded, the display color for displaying the engine torque is gradually changed to orange, yellow, green, and blue as the engine speed increases.

  In this embodiment, as will be described later, the original image data of the display color for displaying the output and torque of the engine as shown in FIG. 2 is compressed and recorded in the ROM 12 in advance. The control circuit 11 detects the rotational speed of the engine, and cuts out rotational speed range image data corresponding to the detected rotational speed from the original image data of the display color that displays the output and torque of the engine. The engine speed-output-torque display screen (for example, see FIG. 3) is drawn and displayed on the display monitor 14 using the cut-off speed range image data. Thus, the display color original image data for displaying the output and torque of the engine is used for displaying the rotational speed range image data that dynamically changes in accordance with the vehicle information.

  In this embodiment, the detected engine speed ± 1000 r.m. from the original image data of the display color that displays the output and torque of the engine. p. It is assumed that the rotational speed range image data corresponding to the rotational speed range of m is cut out.

  For example, if the engine speed is 3500 rpm. p. FIG. 3 shows the rotation speed-output-torque display screen 31 displayed on the display monitor 14 when m. Output torque display color 2500 r. p. m to 4500 r. p. Original image data in bitmap format corresponding to the cut-out range 21 up to m is read out (cut out) from the RAM 13, and the read-out image data is superimposed (pasted) on the background image data as will be described later, and the rotation speed − The output-torque display screen 31 is drawn and displayed on the display monitor 14.

  FIG. 4 shows that the engine speed is 4500 rpm. p. It is a figure for demonstrating the rotation speed-output-torque display screen 31 displayed on the display monitor 14 at the time of m. The engine speed is 3500 r. p. As the value increases from m, the cutout range 21 shown in the output torque display color diagram 20 of FIG. 3 is shifted to the high speed side. The engine speed is 4500 r. p. m, as shown in FIG. p. m-5500 r. p. The cut-out range 22 is up to m. As a result, bitmap image data corresponding to the cutout range 22 is read (cutout) from the RAM 13, and the read image data is superimposed (pasted) on the background image data as will be described later, as shown in FIG. Then, the display image data of the rotation speed-output-torque display screen 31 displayed on the display monitor 14 is drawn.

  The update timing of the rotation speed-output-torque display screen 31 is 50 milliseconds in the present embodiment.

  FIG. 5 is a diagram for explaining a memory area of the RAM 13. Display image data generated in the display memory area of the RAM 13 is displayed on the display monitor 14 as a rotation speed-output-torque display screen 31. In the RAM 13, two memory areas (VRAM) 131 and 132 for storing display image data and a memory area 133 for decompressing and storing the original image data stored in the ROM 12 are secured. The PNG format original image data stored in the ROM 12 is decompressed in the BMP format and stored in the memory area 133.

  The rotation speed / output / torque display screen 31 is displayed on the display monitor 14 by alternately using the display image data stored in the memory area 131 and the display image data stored in the memory area 132.

  As described above, the decompressed original image data of the ROM 12 is stored in the memory area 133. Then, as shown in FIG. 5, a part 133 a of the decompressed original image data in the memory area 133 is copied, and the copied image data 132 a is pasted on the memory areas 131 and 132.

The display image data drawn in the memory areas 131 and 132 is drawn using the following (i), (ii), and (iii).
(I) The original image data stored in the ROM 12 is decompressed and temporarily stored in the memory area 133, and is copied and pasted from the memory area 133 by a display command on the rotation speed-output-torque display screen 31. The background image data (ii) The engine image display image data (iii) drawn on the basis of the vehicle information by the control circuit 11 (iii) The original image data stored in the ROM 12 is decompressed and temporarily stored in the memory area 133. Rotational speed range image data 132a cut out from the memory area 133 according to the detected rotational speed by the display update command on the rotational speed-output-torque display screen 31

  FIG. 6 is a diagram for explaining the original image data stored in the memory area 133 in order to generate the display image data of the rotation speed-output-torque display screen 31. The memory area 133 stores the original image data of the rectangular figures 41 and 42 for displaying the engine output and torque on the rotation speed-output-torque display screen 31. Some or all of these rectangular figures 41 and 42 are copied, and the copied rectangular figures 41 and 42 are pasted into the memory areas 131 and 132. As shown in FIG. 6, the memory area 133 of the RAM 13 is virtually represented as an XY plane, and the range to be copied is designated by coordinate points of XY coordinates. For example, as shown in FIG. 6, in a rectangular figure 41, points (X1, Y1), (X2, Y2), (X3, Y3), (X4, Y4) are designated to designate a range to be copied. In order to use the memory area 133 efficiently and to shorten the access time to the rectangular figures 41 and 42, the rectangular figures 41 and 42 are stored together in one place.

  7-10, the detected engine speed is 3500 r.s. p. A process of generating display image data of the rotation speed-output-torque display screen 31 performed at m will be described. As shown in FIG. 7A, the background image data (bitmap data) of the rotation speed-output-torque display screen 31 stored in the RAM 13 is copied from the memory area 133 and pasted in the memory area 132. Next, as shown in FIG. 7B, numbers and scales representing the rotational speed are drawn according to the rotational speed of the engine.

  Thereafter, an area to be cut out from the rectangular figures 41 and 42 shown in FIG. 6 is designated based on the detected rotational speed, and the image data in the area is copied as rotational speed range image data. The copied output and torque rotational speed range image data is pasted to each of the output and torque rectangular frames shown in FIG. 7B, and the rotational speed range image data is superimposed on the background image data.

  Specifically, it is as follows. As shown in FIG. 8, a graphic 41a in a rotation speed range designated by the detected rotation speed is copied from a rectangular graphic 41 stored in the memory area 133, and the background image data drawn in the memory area 132 in advance is copied. Paste in the output display frame.

  Next, as shown in FIG. 9, a background image in which a graphic 42 a within a rotational speed range designated by the detected rotational speed is copied from the rectangular graphic 42 stored in the memory area 133 and drawn in the memory area 132. Paste in the torque display frame of the data.

  As described above, as shown in FIG. 10, the image data of the rotation speed-output-torque display screen 31 is generated in the memory area 132. Then, the display image data generated in the memory area 132 is displayed on the display monitor 14, and the rotation speed-output-torque display screen 31 is displayed. When the generation of the image data in the memory area 132 is completed, the display image data of the rotation speed-output-torque display screen 31 to be displayed next is similarly generated in the memory area 131. Then, after 50 milliseconds, the rotation speed / output / torque display screen 31 is displayed on the display monitor 14 using the display image data generated in the memory area 131. In this way, the rotation speed-output-torque display screen 31 is displayed on the display monitor 14 by alternately using the display image data generated in the memory area 131 and the display image data generated in the memory area 132. As described above, since the rotation speed-output-torque display screen 31 is updated every 50 milliseconds, display image data of the rotation speed-output-torque display screen 31 is generated in less than 50 milliseconds.

The vehicle-mounted image display device 1 according to the first embodiment described above has the following operational effects.
(1) Original image data 41 and 42 used for displaying engine output and torque dynamically changing according to the driving situation of the vehicle are stored in the RAM 13, and the engine is selected from the original image data 41 and 42. The image data in a range corresponding to the number of rotations is copied and pasted on the image data representing the background, and the rotation number-output-torque display screen 31 is generated. Therefore, it is not necessary to store in advance the original image data of the engine speed-output-torque display screen 31 having different engine speeds by a predetermined speed in the ROM 12, and the amount of image data stored in the ROM 12 is reduced. be able to. Further, it is not necessary to draw all of the rotation speed-output-torque display screen 31 from the beginning according to the rotation speed of the engine, and the processing time for generating the display image data of the rotation speed-output-torque display screen 31 is shortened. Can do.

(2) A single RAM 13 is provided with memory areas 131 and 132 for storing display image data, and a memory area 133 for decompressing and storing original image data stored in the ROM 12. Accordingly, it is possible to copy the image data in the range corresponding to the engine speed from the original image data indicating the rotational speed range and paste it on the background image data by the processing in the single RAM 13. Data generation processing can be accelerated.

-Second Embodiment-
An in-vehicle image display device 1A according to a second embodiment of the present invention will be described. The vehicle-mounted image display device 1A according to the second embodiment of the present invention can display the engine speed on the display monitor 14. Since the configuration of the in-vehicle image display device 1A is the same as that of the in-vehicle image display device 1A according to the first embodiment, description thereof is omitted.

  Next, display image data generation processing according to the second embodiment of the present invention will be described with reference to FIGS. The in-vehicle image display apparatus 1A according to the second embodiment of the present invention displays the engine speed on the display monitor 14 as a tachometer screen.

  FIG. 11 is a diagram for explaining the tachometer screen 50. A tachometer 51 is displayed on the tachometer screen 50. In the tachometer 51, the central angle of the fan figure 52 that displays the engine speed changes in accordance with the engine speed.

  Next, with reference to FIG. 12 and FIG. 13, display image data generation processing of the tachometer screen 50 will be described. The tachometer screen 50 includes background image data 61 shown in FIG. 12A and dynamic image data (hereinafter referred to as a sector shape) shown in FIG. 12B which is pasted on the background image data 61 and generates display image data of the tachometer 51. Graphics) 62.

  The original image data of the background image data 61 and the dynamic image data 62 is compressed and stored in the ROM 12, decompressed at a predetermined timing, and stored in the memory area 133 as bitmap data. The copy range (θ) of the fan-shaped figure 62 is determined according to the engine speed.

  With reference to FIG. 13, a process for generating display image data on the tachometer screen 50 will be described. As shown in FIG. 13A, the background image data of the tachometer screen 51 stored in the memory area 133 of the RAM 13 is pasted to the memory area 132. Next, the image data (sector figure) 62a of the area defined by the cut-off angle θ corresponding to the engine speed, which is vehicle information, is copied from the sector figure 62 stored in the memory area 133, and the memory Affixed to the background image data in the area 132.

  The tachometer screen 50 is displayed by displaying the display image data generated in the memory area 132 as described above on the display monitor 14. When the generation of display image data in the memory area 132 is completed, generation of display image data for the next tachometer screen 50 is started in the memory area 131.

The vehicle-mounted image display device 1A according to the second embodiment described above has the following operational effects.
The image data 62a of the area defined by the cut-out angle θ corresponding to the engine speed is copied from the fan-shaped original image data 62 in the bitmap format stored in the RAM 13 in advance. The copied image data 62a is pasted on the background image data, and the display image data of the tachometer screen 50 is generated. Therefore, it is not necessary to store in advance the original image data of the tachometer screen 50 having different engine revolutions by a predetermined number of times in the ROM 12, and the amount of image data stored in the ROM 12 in advance can be reduced. Further, since the control circuit 11 does not draw all the tachometer screen from the beginning according to the engine speed, the processing time for generating the display image data of the tachometer screen can be shortened.

  In the in-vehicle image display device 1A, the display image data of the tachometer screen 50 may be generated as follows. Also in this case, in the memory area 133, as shown in FIGS. 14A and 14B, the background original image data 61 necessary for generating the image data of the tachometer 51 and the original image data dynamically changing are used. 62 is decompressed and stored. Further, as shown in FIG. 14C, among the image data pasted and pasted, the fan-shaped figure 63 that transmits the image data pasted up and displays the image data pasted down is displayed. Is stored in the memory area 133. The copy range (θ) of the fan-shaped figure 63 is determined according to the engine speed, and a part of the fan-shaped figure 63a of the fan-shaped figure 63 is copied.

  With reference to FIG. 15, processing for generating display image data of the tachometer screen 50 using the image data shown in FIG. 14 will be described. As shown in FIG. 15A, the background image data 61 of the tachometer screen 51 stored in the ROM 12 is decompressed and stored in the memory area 133. The image data in the area defined by the cut-out angle θ corresponding to the engine speed is copied from the fan-shaped figure 62 decompressed and stored in the memory area 133 and pasted on the background image data in the memory area 132. Then, as shown in FIG. 15C, the transmission image data 63a in the area defined by the cut-off angle θ corresponding to the engine speed is copied from the fan-shaped figure 63 decompressed and stored in the memory area 133. And pasted to the background image data in the memory area 132. As shown in FIG. 15C, the background image of the tachometer 50 is displayed in the portion where the transmission image data 63a is pasted.

  Even in the above-described manner, it is not necessary to store in advance the original image data of the tachometer screen 50 having different engine revolutions by a predetermined number of times in the ROM 12, and the data amount of the ROM 12 can be reduced. Further, since the control circuit 11 does not draw all the tachometer screen from the beginning according to the engine speed, the processing time for generating the display image data of the tachometer screen can be shortened.

  The case where the rotation speed-output-torque display screen 31 and the tachometer screen 50 are displayed on the display monitor 14 has been described above. However, according to the present invention, any information can be used as long as it is a display screen for copying and pasting image data related to a driving operation or driving situation of a vehicle that dynamically changes according to vehicle information and pasting the image data on the background image data. It can also be applied to the screen to be displayed. For example, a speedometer, a fuel gauge, a water temperature gauge, and the like may be displayed.

  Although the engine output and torque are displayed with color gradients on the rotation speed-output-torque display screen 31, they may be displayed with light and dark gradients. For example, the display color for displaying the output of the engine may become darker as the engine speed increases. In addition, a gradient that changes from one color to the other in two colors instead of multiple colors as in the rotation speed-output-torque display screen 31 may be used.

  The above description is merely an example, and the present invention is not limited to the above embodiment.

The correspondence between the elements of the claims and the embodiments will be described.
The detection means of the present invention corresponds to the control circuit 11, and the first storage means and the second storage means correspond to the RAM 13. The extraction unit and the generation unit correspond to the control circuit 11, and the third storage unit corresponds to the ROM 12. In addition, the above description is an example to the last, and when interpreting invention, it is not limited to the correspondence of the component of said embodiment and the component of this invention at all.

It is a block diagram which shows the structure of the vehicle-mounted image display apparatus of embodiment of this invention. It is a figure for demonstrating the display color which displays an engine output and an engine torque. The engine speed is 3500 r. p. It is a figure for demonstrating the rotation speed-output-torque display screen displayed on a display monitor at the time of m. The engine speed is 4500 r. p. It is a figure for demonstrating the rotation speed-output-torque display screen displayed on a display monitor at the time of m. It is a figure for demonstrating the memory area of RAM. It is a figure for demonstrating the original image data stored in the memory area | region in order to produce | generate the display image data of a rotation speed-output-torque display screen. It is a figure for demonstrating the production | generation process which produces | generates the display image data of a rotation speed-output-torque display screen. It is a figure for demonstrating the production | generation process which produces | generates the display image data of a rotation speed-output-torque display screen. It is a figure for demonstrating the production | generation process which produces | generates the display image data of a rotation speed-output-torque display screen. It is a figure for demonstrating the production | generation process which produces | generates the display image data of a rotation speed-output-torque display screen. It is a figure for demonstrating a tachometer screen. It is a figure for demonstrating the original image data decompress | decompressed to the memory area | region in order to produce | generate the display image data of a tachometer screen. It is a figure for demonstrating the production | generation process of the display image data of a tachometer screen. It is a figure for demonstrating the original image data decompress | decompressed to the memory area | region in order to produce | generate the display image data of the tachometer screen in other embodiment. It is a figure for demonstrating the production | generation process of the display image data of the tachometer screen in other embodiment.

Explanation of symbols

1,1A On-vehicle image display device 11 Control circuit 12 ROM
13 RAM
14 Display monitor 131, 132, 133 Memory area

Claims (3)

A display for displaying an image relating to the driving operation and driving situation of the vehicle based on the drawing data;
Detecting means for detecting vehicle information;
First storage means for storing background image data as a background of the image displayed on the display;
Second storage means for storing original image data of dynamic image data superimposed on the background image data and dynamically changing according to vehicle information;
Extraction means for extracting the dynamic image data from the original image data stored in the second storage means based on the vehicle information detected by the detection means;
An in-vehicle image display device comprising: generation means for generating the drawing data by superimposing dynamic image data extracted by the extraction means on background image data read from the first storage means. The in-vehicle image display device according to claim 1,
Third storage means in which original image data of the dynamic image data stored in the second storage means is compressed and stored;
An in-vehicle image display device comprising: decompression means for decompressing the original image data stored in the third storage means and storing the decompressed data in the second storage means. The in-vehicle image display device according to claim 1 or 2,
The vehicle-mounted image display device, wherein the first and second storage means store original image data in a bitmap format.

Images