JP2020104714A - Information display device and information display method of automobile - Google Patents

Abstract

To provide an information display device and information display method capable of efficiently transmitting various information by promoting the movement of a visual line to character information displayed in a peripheral visual field area.SOLUTION: An information display device for a driver of an automobile includes a function for displaying information with a horizontally written character string 6 in a peripheral visual field area 25 outside a central visual field during driving, and a function for superposing or compositing a transition moving image 7 of a geometrical graphic element on a display area of the character string 6 to display the transition image in starting to display the character string 6, and the transition moving image 7 reduces and eliminates the breath of the graphic element after enlarging the breath from a start value to the maximum value to expose the character string 6 together with the reduction and elimination.SELECTED DRAWING: Figure 3

Description

The present invention relates to an information display device for a vehicle, and more particularly, to an information display device and an information display method for a driver who is driving a vehicle.

As the functionality of automobiles has increased, the amount of information presented to the driver by the automobiles has become complicated and increasing. The driver of the vehicle needs to recognize the information presented by the HMI (Human Machine Interface) and perform an appropriate driving operation while maintaining attention to the traffic in front and in the vicinity. In order to meet this requirement within the limited human cognitive ability, HMI devise is important.

Patent Document 1 proposes a method for achieving both rough information transmission and monitoring of forward and peripheral traffic by a visual display having a low temporal/spatial frequency that can be recognized by a human peripheral visual field. However, in a vehicle equipped with an advanced safety system and an in-vehicle information communication system, it is necessary to reliably transmit various and complicated information to the driver.

Japanese Patent No. 4830384

In order to reliably transmit various and complicated information to the driver, it is advantageous to use character information having a sentence structure. For example, one pictogram expressing "brake" cannot determine whether it is an operation notification of the automatic braking system or a brake operation request to the driver, but if it is text information having a sentence structure, such a problem will occur. Does not occur.

On the other hand, there is a problem that the character information can be recognized only in the central visual field. Information can be displayed in the central visual field while driving using a head-up display, but this hinders the field of vision during driving. Further, the character information has a problem that the time required for reading increases in proportion to the number of characters. Therefore, there is a need for a technique that prompts the user to move his or her line of sight to the character information displayed in the peripheral visual field outside the central visual field during driving so that the text information can be accurately read in a shorter time and with less psychological burden.

The present invention has been made in view of the above situation, and an object of the present invention is to prompt the movement of the line of sight to the character information displayed in the peripheral visual field area, reduce the time required for reading, and obtain various information. An object of the present invention is to provide an information display device and an information display method that can be efficiently transmitted.

In order to solve the above problems, the present invention is an information display device for a driver of an automobile, a function of displaying information in a horizontal writing character string in a peripheral visual field outside the central visual field during driving, and the character string. Has a function of superimposing or synthesizing the transitional moving image of the geometrical figure element on the display area of the character string at the start of display, and the transitional moving image has a width from the start value to the maximum value of the figure element. An information display device for an automobile, which is configured so as to be enlarged and then reduced and disappear, and the character string is displayed together with the reduced and disappeared.

According to the vehicle information display device of the present invention, the transition moving image of the geometrical graphic element is displayed at the start of the information display in the peripheral visual field outside the central visual field of the vehicle driver, thereby Due to the change and brightness of the transition video with the change of the lateral width over time, in addition to the improvement of the noticeability and the attractiveness of the information display, the improvement of the cognitive performance such as the character reading speed and the accuracy after the eye movement, the information The time from the start of presentation to the completion of recognition can be expected to be reduced, and the psychological burden required for recognition can be expected to be reduced. By utilizing the character information in the information display of the vehicle, it is possible to display the information corresponding to the higher functionality of the vehicle. Is advantageous.

It is a block diagram which shows the information display system of a motor vehicle. It is a schematic diagram showing an information display part around a front window. 6 is a frame display image showing information display according to the embodiment of the present invention. It is the display image (a) of the character string which comprises the information display which concerns on embodiment of this invention, a transition moving image (b), and the display image (c) which combined them. 6 is a graph showing the relationship between the passage of time and the amount of information. It is a graph which shows the relationship between time progress and the amount of information and information comprehension degree. 6 is a graph showing a frame display image (a) showing information display according to the embodiment of the present invention, its luminance change (b), and luminance change (c) of different examples. A frame display image (a) showing information display according to the embodiment of the present invention, and a frame in each case of a relatively short transition video (b), a relatively long transition video (c), and no transition video (d) It is a graph which shows a display image and a change in brightness. 9 is a frame display image showing another embodiment of information display according to the present invention. 9 is a frame display image showing another embodiment of information display according to the present invention. 9 is a frame display image showing a modified example of information display according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing a vehicle information display system in which the present invention can be implemented. In the figure, the vehicle is a group of external sensors such as radar, camera, LIDAR, vehicle speed sensor, yaw rate sensor, acceleration sensor, etc. It is equipped with a detection means 4 including a group of internal sensors of the vehicle, and an in-vehicle system 3 that performs traveling control such as ACC and LKA, driving assistance, and failure detection based on the detection information. Presentation information for the driver, such as vehicle information and warnings, is sent to the display information processing apparatus 1 via the vehicle-mounted network 5.

The display information processing device 1 stores a communication interface for receiving driver's presentation information, a program and data (character string, pictogram, image data) for generating image data to be displayed corresponding to the content of the presentation information. The display image is updated at a predetermined refresh rate. The display image is updated at a predetermined refresh rate by a CPU, a CPU that performs processing such as image generation and composition, a RAM that temporarily stores the generated image data, and a microcomputer that includes an interface that outputs to the display device 2. It

As a software configuration of the display information processing apparatus 1, the input information processing for allocating the display data stored in the data table corresponding to the transmitting device to the presentation information (display information code) received via the communication interface, transition The display device 2 is controlled so as to generate a display image by including or generating a moving image, including superimposing or synthesizing a transition moving image on character information.

The display device 2 is preferably a display device including a display screen by a dot matrix such as LCD and OLED, and displays the display image generated by the display information processing device 1 to the driver. As shown in FIG. The present invention can be suitably applied to a display device located in the peripheral visual field outside the central visual field 20 while the driver is driving, for example, a projection type head-up display (HUD) that projects the display image 21 on the front window 10.

In addition, as the display device 2, a combiner-type head-up display 22, a display of a meter cluster 23, a display 24 of a car navigation system, and a rear-view mirror 12, which are installed on the instrument panel 11, are also incorporated. The present invention can be applied to a rear-view mirror monitor, a side-mirror monitor incorporated in the side-mirror 13, a front pillar window 14 (HUD, mirror monitor), a drive recorder display (not shown), and the like.

As shown in FIG. 3, the display information processing device 1 displays “forward” on the display unit 25 of the display device 2 as described above as the driver presentation information in association with the occurrence of an event (information reception from the in-vehicle system 3 side). When displaying a horizontally written character string 6 such as "Caution", it has a function of superimposing or synthesizing a transition moving image 7 of geometrical figure elements on the character string 6 when the display of the character string 6 is started. ..

The transition moving image 7 is shown as 4 frames for convenience in FIG. 3, but the number of frames actually displayed corresponds to the refresh rate (frame rate) of the display information processing device 1 and the display device 2, and will be described later. Since the display time is extremely short as described above, the number of images is relatively small, for example, but not limited to, for example, about 5 to 15 frames. In FIG. 3, a white character string and a transitional moving image are displayed on a black background, but in the head-up display, the black portion is the background outside the vehicle seen through the transparent glass.

FIG. 3 shows a transitional moving image 7 of a typical pattern, in which the width of the rectangular graphic element (7) filled in with the same color as the character string 6 is from the start value (reference numeral 7′ in FIG. 3) to the maximum value ( It is configured such that the character string 6 is gradually displayed after the graphic element (7) is gradually reduced and then disappears, and the graphic element (7) is gradually expanded. , Expands from the left side, which is the start side in the writing direction (left to right) of the horizontally written character string 6, to the right side, which is the end side after reaching the maximum value where all the character strings 6 are hidden. Disappears.

In other words, in the transition moving image 7, the rectangular graphic element indicated by reference numeral 7 appears from the left side which is the starting end side in the writing direction of the horizontal writing character string 6 and moves toward the right side and disappears, or the display area It is a form that fades in from the left side and fades out to the right side. The advantage of this pattern is that the character strings 6 are displayed in a direction in which they are read one by one from the left side, which is the reading side of the character strings 6, from the state in which the character strings 6 are all covered.

FIG. 4 is an exploded view of a transitional moving image, which is vertically arranged. With the occurrence of an event, a still image of the character string “front caution” as shown in FIG. 4A is displayed, and at the same time, a rectangular graphic element as shown in FIG. 4B moves in the writing direction. By superimposing or synthesizing the moving image on the still image of the character string, a display image as shown in FIG. 4C is generated.

That is, the character string is prepared as a still image (character data, font data) corresponding to the presentation information to the driver, and by preparing only a very short transition video (still image of a predetermined number of frames) separately, It becomes possible to display information having a transition video, and it is also possible to display transition videos of different patterns depending on the type of presentation information.

For example, the presentation information output from the in-vehicle system 3 may include identification data divided according to information content, such as urgency and severity, as well as data that determines an image such as a character string or pictogram to be displayed. The display information corresponding to the presentation information can be displayed by providing the display information processing apparatus 1 with a reference table that defines the relationship between the information classification and the display content and the image data such as character strings and pictograms and the transition image. It may be determined by the information processing device 1.

Further, in the above embodiment, the case where the character string 6 (display information) and the transitional moving image 7 are superimposed or combined and displayed on the display unit 25 of the single display device 2 has been described. The character string 6 is displayed on one display unit of the two display devices (first and second display devices) which are controlled and the display units are stacked and the transition video 7 is displayed on the other display unit on the front side. It can also be configured to display.

Further, the character string 6 may be projected from one of the two projection type head-up displays arranged adjacently, and the transition moving image 7 may be projected from the other to the same position. That is, the character string 6 (display information) and the transition video 7 can be superimposed or combined in a display space by a plurality of hardware independent display devices. For example, the existing character string 6 (display information) is displayed. The display device 2 that displays the transition video 7 can be added to the display device of FIG.

The information display device according to the present invention can also be implemented in a mode in which one display information processing device 1 controls a plurality of display devices 2 (display units, indicators). Further, the information display device according to the present invention can be applied to automobiles other than four-wheeled vehicles, such as two-wheeled vehicles and small mobility vehicles, which require information display to the driver or passengers.

Next, the operation and effect of the information display according to the above embodiment will be considered.
FIG. 5 is a graph showing the relationship between the elapsed time of information display and the amount of information in the example of the present invention and the comparative example, and the solid line shows the transition moving image together with the character string as shown in FIG. 4C. The time-dependent change of the information amount of Example 51 is shown, and the broken line shows the time-dependent change of the information amount of Comparative Example 50 in which only the character string is displayed as shown in FIG.

In Comparative Example 50, the character information is displayed at the same time as the event occurs, so the displayed information amount reaches 100% immediately, whereas in Example 51, the character string is displayed while the transitional moving image is displayed in a superimposed manner. Since it cannot be read and the character string is displayed as the graphic element moves, the information amount gradually increases and reaches 100% at the end of the transition image.

Therefore, in Example 51, the information amount as character information reaches 100% due to the transition moving image that hides the character string, after Comparative Example 50. However, in the information display in the peripheral visual field outside the central visual field 20, the driver can recognize the start of the display but cannot read the character string. Therefore, there is no influence such as a delay in reading due to a delay in character display accompanying the display of a transitional moving image in a short time.

On the other hand, the brightness of the information display is larger in Example 51 to which the transition moving image is added than in Comparative Example 50 including only the character string, and in addition to the comparative example 50 due to the movement of the graphic element in the high brightness area. There is an advantage that the display start can be recognized more quickly and surely than in the case of 50.

FIG. 6 is a graph showing the relationship between the time lapse of information display and the amount of information/information comprehension in the inventive example and the comparative example. A thick solid line 61 indicates the information comprehension by the information display in Example 51, and a thick broken line 60. Shows the transition of the information comprehension degree by the information display of Comparative Example 50.

As described above, in the sixty-first embodiment, the movement of the transition video and the change in the luminance improve the noticeability of the information display, and the driver's line of sight moves faster. The spatially increasing amount of information increases the cognitive performance as indicated by the symbol α in the figure compared to Comparative Example 60, and shortens the time from the start of information presentation to the completion of recognition. At the same time, the effect of reducing the psychological burden required for cognition can be expected.

Due to the characteristics of the brain's ability to recognize human visual information, by presenting information via a transitional video with a specific pattern, cognitive performance such as speed, accuracy, and subjective readability of character reading is improved. It has been confirmed experimentally.

7 (a) is similar to a typical pattern of the transition video frame display image and FIG. 3, FIG. 7 (b) is a graph showing the brightness change, a transition half 7a with display start t ₀ is The brightness gradually increases from the brightness Lc due to only the character string as the width of the graphic element increases, and the graphic element reaches the maximum width and reaches the maximum brightness Lx at time t _max. The brightness gradually decreases with the reduction of, the transition moving image ends at time t _end , and thereafter, the brightness becomes Lc only by the character string. Strictly speaking, the luminance distribution of the character string portion should be taken into consideration, but the influence on the overall luminance change is small.

The distribution of the brightness rise time Ta in the first half 7a of the transition and the brightness decrease time Tb in the second half 7b of the transition are almost the same in the example shown by the solid line in FIG. 7B, that is, the increase rate and the decrease rate of the brightness (graphic element width). Although the rate is constant, it has been confirmed that when the brightness decrease time Tb is longer than the brightness increase time Ta (Tb>Ta), it is advantageous for improving the cognitive performance. As shown by a broken line 7a' in FIG. 7B, there may be a delay time Td at the start of superimposing graphic elements.

FIG. 7C shows a modified example in which the pattern for increasing/decreasing the width of the graphic element is different. In the figure, (1) a solid line 71 is a pattern in which the increase rate of the brightness (graphic element width) in the first half of the transition is larger than the decrease rate in the second half of the transition, and the figure element maximum width/maximum brightness Lx is reached in a relatively short time. , (2) The dotted line 72 is a pattern in which after reaching the maximum width/maximum brightness Lx of the graphic element, the state is maintained, and thereafter, the width/luminance of the graphic element decreases, and (3) the dotted line 73 is A pattern in which the increase rate becomes gentle as the brightness increases, and the decrease rate becomes larger as the figure element width/brightness decreases through the figure element maximum width/maximum brightness Lx. The figure shows a pattern in which the display of the transitional moving image is started at the large/maximum luminance Lx, and thereafter, the width of the graphic element and the luminance decrease. In each of these cases, there may be a delay time Td at the start of superimposing graphic elements as described above.

Next, the influence of the display time of the transition video on the cognitive performance will be described with reference to FIG.
FIG. 8A shows the frame display image of the information display of the embodiment accompanied by the transitional moving image of the typical pattern similar to FIG. 3, and the solid line a of the graph shows the luminance change. As described above, the driver's line of sight is directed toward the central visual field during driving, but after the display starts when an event occurs, the visual line moves to the information display by noticing the information display in the peripheral visual field. , Gaze at the display, read the characters, and recognize the meaning of the presentation information.

At this time, in comparison with the case without transition video/only character string shown in FIG. 8D, in the example (t=0.4 seconds) shown in FIG. , The awareness of the display and the attractiveness of the line of sight are improved, and the brain is activated before moving the line of sight to read the character information in the central visual field, and the cognition of cognition when moving the line of sight and reading the character information in the central visual field is read. Performance is improved and the time from the start of information presentation to the completion of recognition is shortened. In particular, in the latter half of the transition, the amount of display information, that is, the number of characters increases with time along the writing direction, so that an effect of reducing the reading load can be expected.

On the other hand, in the comparative example (tb=0.2 seconds) shown in FIG. 8B, as shown by the broken line b of the graph, the transition moving image is displayed for a short time, and the driver notices the display and moves the line of sight. While the transitional moving image is ended, the contribution to the improvement of the cognitive performance cannot be expected as compared with the case without the transitional moving image/only the character string shown in FIG. 8D. However, it seems that there is a certain effect in improving the noticeability of the display due to the brightness change of the transition video.

On the other hand, in the comparative example (tc=0.6 seconds) shown in FIG. 8C, the transition moving image is displayed for a long time as shown by the broken line c in the graph, and the driver notices the display and moves to the center of the line of sight. Even if the character information can be read in the field of view, the character string is hidden by the graphic element, and compared to the case without the transition animation/only the character string shown in FIG. 8D, from the information presentation start to the recognition completion. It cannot be expected to contribute to shortening the time. However, there is a certain effect in improving the noticeability of the display due to the change and brightness of the transition video and the incentive of the line of sight, and in reducing the reading load as the number of characters increases over time in the writing direction. Seem.

Since the cognitive speed and the cognitive performance of the display cannot be directly measured, the experiment cannot completely reproduce the display form of the actual display device. It was confirmed that the correct answer rate was remarkably improved in 3 to 0.5 seconds. On the other hand, at 0.6 seconds, due to the reduction of the substantive reading time due to the display of the transition video, the accuracy rate was lower than that when only the character string was displayed. It was also confirmed that simple blinking had no effect on the recognition performance of text information.

The above results are for the case where the number of displayed characters is 5 and the difference may be caused by the number of characters and the display position. However, in the case of 4 to 8 characters that allows short-term memory, in addition to numbers, Chinese characters, pictograms, symbols It is estimated that the letters tend to have a similar tendency.

Next, still another embodiment of the transition video will be described with reference to the drawings.

In FIG. 9A, since the rectangular graphic element has gradation in the width direction, the contrast of the edges at the front end (right side) and the rear end (left side) in the moving direction becomes gentle, and the brightness as a whole is suppressed. There is. This pattern is slightly less attractive than the above-described representative example, but has less stimulus instead, and is suitable for information display with relatively low urgency or importance.

FIG. 9B shows an example in which the color of a rectangular graphic element is changed. In the first half of the transition, which is seen in peripheral vision, where cognitiveness to color is weak, white (achromatic color) with relatively high brightness is shown. ), priority is given to noticeability and attractiveness, while color information can be gradually added in the latter half of the transition assuming central vision to improve the visibility by color.

FIG. 10 shows a case where the character string is not displayed in the first half of the transition and the character string is displayed in the latter half of the transition. Since characters cannot be read in the first half of the transition seen in peripheral vision, there is no problem in reading the characters even with this pattern, and the luminance change width from the start of display to the first half of the transition becomes large.

FIG. 11A shows a case where the front and rear edges of the graphic element are oblique, in other words, the graphic element is not a rectangle but a parallelogram. Although the geometrical shape of the graphic element can be set arbitrarily, the shape cannot be recognized by peripheral vision, so the recognition performance can be expected to be improved, although the significance of the special shape is small.

FIG. 11B shows a pattern in which a rectangular graphic element appears from the center, expands in width on both left and right sides, reaches maximum display, then shrinks from both left and right sides, and disappears at the center. Although the brightness change is similar to the representative example described above, the horizontal movement is canceled by the expansion and reduction in both left and right directions, and the display width of the character string cannot be used for the movement of the transition video, but the recognition performance is improved. Can be expected.

In addition to the above, FIG. 11C shows a pattern in which the vertical width of a rectangular graphic element is also enlarged or reduced. In this pattern, as in the above, only the brightness change is recognized, and the display width of the character string cannot be used for the movement of the transition moving image. Even in these patterns, if at least the latter half of the transition is moved in the writing direction (to the right) and disappears as in the case of the typical embodiment, the display width of the character string cannot be fully utilized. , Improvement in recognition performance can be expected.

Although some embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications and changes can be made based on the technical idea of the present invention. Add a note.

1 Display Information Processing Device 2 Display Device (Display Unit)
3 In-vehicle system 4 Sensor group 5 In-vehicle network 6, 6'Character string 7, 7'Transition video (graphic element)
10 Front Window 11 Instrument Panel 12 Rearview Mirror 13 Side Mirror 14 Front Pillar Window 20 Central Field of View 21,22 Head-up Display 23 Meter Cluster 24 Car Navigation System 25 Display

Claims (8)

An information display device for an automobile driver,
A function to display information in horizontal writing strings in the peripheral visual field outside the central visual field during driving, and
When the display of the character string is started, it has a function of superimposing or synthesizing a transition moving image of a geometrical figure element in the display area of the character string,
The transition moving image is configured such that the horizontal width of the graphic element expands from a start value to a maximum value and then shrinks and disappears, and the character string is displayed with the reduction and disappearance.
Information display device for automobiles. 2. The information display device for an automobile according to claim 1, wherein the width of the graphic element is enlarged from the start end side in the writing direction of the character string and reduced toward the end side. The vehicle information display device according to claim 1, wherein the horizontal width of the graphic element is such that the start value is the maximum value, and the graphic element shrinks and disappears toward the end side in the writing direction of the character string. A display information processing device for generating a display image corresponding to information to be displayed,
A display unit for displaying the display image in a peripheral visual field outside the central visual field during driving,
The display information processing device comprises: a data storage unit for the transition moving image; and an image processing unit for superimposing or synthesizing the transition moving image at the start of displaying the image of the horizontally written character string. The information display device for an automobile according to any one of 1. The data storage unit stores a plurality of transition moving image data having different transition patterns and/or colors, and the image processing unit selects a transition moving image according to information to be displayed and superimposes or combines the transition moving images. The vehicle information display device according to claim 4, further comprising: A method of displaying information to a car driver,
Display information in a horizontal text string in the peripheral visual field outside the central visual field during driving, and
Including a transition moving image of a geometrical figure element when the display of the character string is started, which is displayed by being superimposed or combined with the display area of the character string,
The method for displaying information of an automobile, wherein the transition moving image is enlarged and reduced in width from the start value to the maximum value of the graphic element and then disappears, and the character string is displayed together with the reduced disappearance. 7. The method for displaying information of a vehicle according to claim 6, wherein the width of the graphic element is enlarged from the start side in the writing direction of the character string and reduced toward the end side. 7. The method for displaying information of an automobile according to claim 6, wherein the horizontal width of the graphic element is such that the start value is the maximum value, and the graphic element shrinks and disappears toward the end side in the writing direction of the character string.