JP7125713B2 - Automotive information display device and information display method - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act [Publication name] 2018 Autumn Meeting Scientific Lecture Proceedings (DVD) [Date of publication] October 15, 2018

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information display device for an automobile, and more particularly to an information display device and an information display method for a driver while driving an automobile.

As automobiles become more sophisticated, the amount of information presented to drivers from automobiles is becoming more complex and increasing. A driver of an automobile needs to recognize information presented by an HMI (Human Machine Interface) and perform appropriate driving operations while maintaining attention to traffic ahead and surroundings. In order to meet this demand within the limited range of human cognitive ability, it is important to devise an HMI.

Patent Literature 1 proposes a method of achieving both general information transmission and forward and peripheral traffic monitoring by means of a visual display with low temporal and spatial frequencies perceivable in the human peripheral visual field. However, vehicles equipped with advanced safety systems and in-vehicle information communication systems must reliably transmit diverse and complex information to drivers.

Japanese Patent No. 4830384

In order to reliably convey various and complicated information to the driver, it is advantageous to use character information having a sentence structure. For example, it is not possible to determine whether a single pictogram representing "brake" is an announcement of the operation of the automatic braking system or a request to the driver to operate the brakes. does not occur.

On the other hand, there is a problem that character information can only be recognized in the central visual field. A head-up display can be used to display information in the central field of vision while driving, but it interferes with the driver's field of vision. Furthermore, there is also the problem that character information requires a longer time to read in proportion to the number of characters. Therefore, there is a need for a technology that encourages line-of-sight movement to character information displayed in the peripheral visual field outside the central visual field while driving, and enables accurate reading in a shorter period of time with less psychological burden.

The present invention has been made in view of the actual situation as described above. To provide an information display device and an information display method capable of efficiently transmitting information.

In order to solve the above problems, the present invention provides an information display device for the driver of an automobile, which has a function of displaying information in a horizontal character string in a peripheral visual field area outside the central visual field while driving, and the character string has a function of superimposing or synthesizing a transition animation of geometric figure elements on the display area of the character string at the start of the display of the transition animation, wherein the transition animation has a horizontal width of the figure element from the start value to the maximum value. In the information display device for an automobile, the information display device for an automobile is constructed so as to reduce and disappear after being enlarged, and to display the character string along with the reduction and disappearance.

According to the vehicle information display device of the present invention, at the start of information display in the peripheral visual field outside the central visual field of the driver of the vehicle, a moving image of transition of the geometrical figure elements is displayed. By changing the brightness and movement of the transition video as the width changes over time, in addition to improving the ability to notice and attract attention to the information display, it also improves cognitive performance such as character reading speed and accuracy after line of sight movement. It is expected to shorten the time from the start of presentation to the completion of recognition and to reduce the psychological burden required for recognition. is advantageous.

1 is a block diagram showing an information display system for an automobile; FIG. It is a schematic diagram showing an information display part around the front window. It 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 animation (b), and the display image (c) which combined them. It is a graph which shows the relationship between time progress and information amount. It is a graph which shows the relationship between time progress, information amount, and information comprehension degree. It is a graph which shows the frame display image (a) which shows the information display which concerns on embodiment of this invention, its luminance change (b), and the luminance change (c) of a different Example. Frame display image (a) showing information display according to the embodiment of the present invention, and frames for relatively short transition animation (b), relatively long transition animation (c), and no transition animation (d) It is a graph which shows a display image and a luminance change. 4 is a frame display image showing another example of information display according to the present invention; 4 is a frame display image showing another example of information display according to the present invention. It is a frame display image showing a modified example of information display according to the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing an information display system for an automobile in which the present invention can be implemented. , and an in-vehicle system 3 that performs travel control such as ACC and LKA, driving support, obstacle detection, etc. based on the detection information. Information to be presented to the driver, such as vehicle information, warnings, etc., is sent to the display information processing device 1 via the in-vehicle network 5 .

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

The software configuration of the display information processing apparatus 1 includes input information processing for assigning display data stored in a data table corresponding to a transmitting device to presentation information (display information code) received via a communication interface, transition It includes moving image generation (playback), and controls the display device 2 to generate a display image by superimposing or synthesizing a transition moving image on character information.

The display device 2 preferably has a dot-matrix display screen such as LCD or OLED, and is a display device for displaying a display image generated by the display information processing device 1 to the driver. , a display located in the peripheral field of view outside the central field of view 20 of the driver during driving, such as a projected head-up display (HUD) that projects a display image 21 onto the front window 10 .

In addition, as the display device 2, a combiner type head-up display 22 installed on the upper part of the instrument panel 11, a display of the meter cluster 23, a display 24 of the car navigation system, and a display incorporated in the rearview mirror 12. A rearview mirror monitor installed in the side mirror 13, 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” as presentation information for the driver on the display unit 25 of the display device 2 as described above in response to the occurrence of an event (reception of information from the in-vehicle system 3 side). When displaying a horizontally written character string 6 such as "Attention", at the start of display of the character string 6, it has a function of superimposing or synthesizing a transition animation 7 by geometrical figure elements on the character string 6. .

The transition moving image 7 is shown as four frames for convenience in FIG. Since the display time is extremely short as described above, it is composed of a relatively small number of images, for example, about 5 to 15 frames, although this is not particularly limited. In FIG. 3, a white character string and transition animation are displayed on a black background, but in the head-up display, the black part becomes the background outside the vehicle that can be seen through the transparent glass.

FIG. 3 shows a transition animation 7 of a typical pattern, in which the horizontal width of a rectangular graphic element (7) filled with the same color as the character string 6 changes from the starting value (reference numeral 7' in FIG. 3) to the maximum value ( After gradually enlarging to reference numeral 7), it gradually reduces and disappears, and as the graphic element (7) shrinks and disappears, the character string 6 is gradually displayed. In this example, the graphic element (7) is , expands from the left side to the right side, which is the start side in the writing direction (left to right) of the horizontal text 6, and after reaching the maximum value where all the character strings 6 are hidden, shrinks to the right side, which is the end side disappears.

In other words, in the transition animation 7, a 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 character string 6, moves toward the right side and disappears, or the display area fades in from the left side and fades out to the right side. The superiority of this pattern lies in the fact that the character string 6 is displayed in a direction in which characters are read one by one from the left side, which is the reading side of the character string 6, from the state in which the entire character string 6 is covered.

FIG. 4 shows the transition moving images decomposed and arranged in the vertical direction. When the event occurs, a static image of the character string "Caution ahead" as shown in FIG. 4(a) is displayed, and at the same time, a rectangular graphic element as shown in FIG. 4(b) moves in the writing direction. A display image as shown in FIG. 4C is generated by superimposing or synthesizing the moving image on the still image of the character string.

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

For example, the presentation information output from the in-vehicle system 3 may include data for determining images such as character strings and pictograms to be displayed, as well as identification data classified according to information content such as urgency and severity. Alternatively, a display image corresponding to the presentation information can be displayed by preparing a reference table in the display information processing device 1 that defines the relationship between information classification, display content, image data such as character strings and pictograms, and transition images. It may be determined by the information processing device 1 .

Further, in the above-described embodiment, the case where the character string 6 (display information) and the transition moving image 7 are superimposed or combined and displayed on the display unit 25 of the single display device 2 has been described. A character string 6 is displayed on one of two display devices (first and second display devices) that are controlled and display portions are stacked, and a transition animation 7 is displayed on the other display portion on the near side. It can also be configured to display

Furthermore, it is also possible to configure such that the character string 6 is projected from one of two projection type head-up displays arranged adjacently, and the transition moving image 7 is projected at the same position from the other. That is, it is possible to superimpose or synthesize the character string 6 (display information) and the transition moving image 7 by a plurality of hardware-independent display devices in the display space. A display device 2 for displaying the transition moving image 7 can also be added to the display device of .

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). In addition, the information display device according to the present invention can be applied to automobiles other than four-wheeled vehicles, such as motorcycles and small mobility vehicles, which require information display for drivers and passengers.

Next, the action and effect of the information display according to the above embodiment will be considered.
FIG. 5 is a graph showing the relationship between the amount of information and the elapsed time of information display in the examples and comparative examples of the present invention. The change over time in the amount of information in Example 51 is shown, and the dashed line shows the change over time in the amount of information in Comparative Example 50 in which only character strings are displayed as shown in FIG. 4(a).

In Comparative Example 50, character information is displayed at the same time as an event occurs, so the amount of displayed information immediately reaches 100%. Unreadable and as the text is displayed as the graphical element moves, the amount of information increases gradually, reaching 100% at the end of the transition image.

Therefore, in the fifty-first embodiment, the amount of information as character information reaches 100% due to the transition moving image that hides the character string after the fifty-first comparative example. However, in the information display in the peripheral vision outside the central vision 20, the driver can recognize the start of the display but cannot read the character string. Therefore, there is no effect such as a delay in reading due to a delay in character display accompanying the display of a short-time transition animation.

On the other hand, the brightness of the information display is higher in Example 51, in which the transition animation is added, than in Comparative Example 50, which uses only character strings. There is an advantage that the display start can be recognized more quickly and reliably than 50.

FIG. 6 is a graph showing the relationship between information display over time and the amount of information/information comprehension in the examples and comparative examples of the present invention. shows the transition of the information comprehension degree by the information display of the comparative example 50. FIG.

As described above, in Example 61, the motion of the transition video and the change in luminance improve the ease of noticing the information display, and the driver's line of sight movement is hastened. spatially increasing the amount of information, compared to Comparative Example 60, the cognitive performance is improved as indicated by symbol α in the figure, and the time from the start of information presentation to the completion of recognition is shortened. At the same time, the effect of reducing the psychological burden required for cognition can also be expected.

Due to the characteristics of the human brain's ability to perceive visual information, cognitive performance such as reading speed, accuracy, and subjective readability is improved by presenting information through transitional videos with specific patterns. It has been confirmed experimentally that

FIG. 7(a) is a frame display image of a transition moving image of a typical pattern similar to that of FIG. 3, and FIG. 7(b) is a graph showing the _luminance change. The brightness gradually increases from the brightness Lc of only the character string as the width of the graphic element expands, and at time t _max the graphic element reaches its maximum width and reaches the maximum brightness Lx. , the transition moving image ends at time t _end , and thereafter the luminance becomes Lc due to only the character string. Strictly speaking, the luminance distribution of the character string portion should also be considered, but the effect on the overall luminance change is small.

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

FIG. 7(c) shows a modification with a different increase/decrease pattern of the graphic element width. In the figure, (1) a solid line 71 is a pattern in which the rate of increase in brightness (graphic element width) in the first half of the transition is greater than the rate of decrease in the second half of the transition, and the graphic element maximum width and maximum brightness Lx are reached in a relatively short period of time. , (2) The dashed line 72 is a pattern in which the graphic element width/luminance is maintained after reaching the maximum width/luminance Lx of the graphic element, and then the width/luminance of the graphic element decreases. A pattern in which the rate of increase becomes moderate as the brightness increases, and the rate of decrease increases as the width and brightness of the graphic element decrease after reaching the maximum width and maximum brightness Lx of the graphic element. It shows a pattern in which the display of the transition moving image is started at a large width and maximum luminance Lx, and thereafter the graphic element width and luminance decrease. Also in each of these cases, there may be a delay time Td at the start of superimposition of graphic elements as described above.

Next, the influence of the transition moving image display time on cognitive performance will be described with reference to FIG.
FIG. 8(a) is a frame display image of information display of an embodiment accompanied by a transition moving image of a typical pattern similar to that of FIG. 3, and the solid line a in the graph indicates the luminance change. As mentioned above, the driver's line of sight is directed to the central visual field while driving, but after the display starts due to the occurrence of an event, the driver's line of sight moves to the information display by noticing the information display in the peripheral visual field. , read the characters while paying attention to the display, and recognize the meaning of the presented information.

At this time, in comparison with the case of no transition animation/character string only shown in FIG. In addition, the ability to notice the display and the attractiveness of the line of sight are improved, and the brain is activated before reading text information in the central visual field after moving the line of sight. Performance is improved, and the time from the start of information presentation to completion of recognition is shortened. In particular, in the latter half of the transition, the amount of displayed information, that is, the number of characters increases over time along the writing direction, so that an effect of reducing the burden of reading can be expected.

On the other hand, in the comparative example (tb=0.2 seconds) shown in FIG. The transition moving image ends while the transition moving image is being displayed, and it cannot be expected to contribute to the improvement of cognitive performance compared to the case of no transition moving image/only character strings shown in FIG. 8(d). However, it seems that there is a certain effect in improving the noticeability of the display by changing the brightness of the transition moving image.

On the other hand, in the comparative example (tc=0.6 seconds) shown in FIG. Even when 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. Contribution to the time reduction of However, it is said that there is a certain effect in improving the noticeability of the display due to the change in brightness and movement of the transition video and the attraction of the line of sight, and in reducing the reading burden due to the increase in the number of characters along the writing direction over time. Seem.

Since it is not possible to directly measure the cognitive speed and cognitive performance of the display, the experiment cannot completely reproduce the display form on the actual display device. 0.3 to 0.5 seconds showed a remarkable improvement in the accuracy rate. On the other hand, at 0.6 seconds, the accuracy rate was lower than in the case of displaying only character strings due to the decrease in the actual reading time due to the display of the transitional animation. In addition, it was confirmed that simple blinking had no effect on recognition performance of character information.

The above results are for the case of 5 numbers with a known number of display characters, and there may be differences due to the number of characters and display position. It is presumed that characters also tend to follow a similar trend.

Next, still another example of the transition moving image will be described with reference to the drawings.

In FIG. 9A, the rectangular graphic element has a gradation in the width direction, so that the contrast between the front end (right side) and the rear end (left side) in the moving direction is gentle, and the brightness as a whole is also suppressed. there is This pattern is slightly less attractive than the representative examples described above, but it also provides less stimulus, and is therefore suitable for information display with relatively low urgency and importance.

FIG. 9(b) shows an embodiment in which the color of a rectangular graphic element is changed. ), and while prioritizing noticeability and eye-attraction, color information can be gradually added in the latter half of the transition assuming foveal vision to improve visibility by color.

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

FIG. 11(a) shows the case where the leading and trailing edges of the graphic element are oblique, in other words, the case where the graphic element is a parallelogram instead of a rectangle. Although the geometric shape of the graphic element can be set arbitrarily, since the shape cannot be recognized in the peripheral vision, the significance of the special shape is small, but an improvement in the recognition performance can be expected.

FIG. 11(b) shows a pattern in which a rectangular graphic element appears from the center, expands in width on the left and right sides, reaches its maximum display size, then shrinks on the left and right sides and disappears in the center. Although the brightness change is the same as the representative example described above, the horizontal movement is offset by scaling in both the left and right directions, and although the display width of the character string cannot be used for the movement of the transition animation, the recognition performance is improved. can be expected.

FIG. 11(c) shows a pattern in which, in addition to the above, the vertical width of the rectangular graphic element is also scaled. As with the above pattern, only the luminance change is recognized in this pattern, 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 (right direction) and disappears as in the typical example, the display width of the character string cannot be utilized to the maximum. , an improvement in recognition performance can be expected.

Although several embodiments of the present invention have been described above, it should be noted that the present invention is not limited to the above-described embodiments, and that various modifications and changes are possible based on the technical idea of the present invention. I will add.

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 animation (graphic element)
10 Front window 11 Instrument panel 12 Rearview mirror 13 Side mirror 14 Front pillar window 20 Central visual field 21, 22 Head-up display 23 Meter cluster 24 Car navigation system 25 Display unit

Claims (8)

An information display device for an automobile driver,
A function to display information in horizontal text in the peripheral vision area outside the central vision while driving, and
Having a function of superimposing or synthesizing a transition animation of geometric figure elements on the display area of the character string at the start of display 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, then shrinks and disappears, and the character string appears along with the reduction and disappearance.
Automotive information display device. 2. The information display device for an automobile according to claim 1, wherein the horizontal width of said graphic element expands from the starting end side in the writing direction of said character string and shrinks and disappears toward the trailing end side. 2. The information display device for an automobile according to claim 1, wherein the horizontal width of said graphic element has a maximum value at said starting value and shrinks and disappears toward the end side in the writing direction of said character string. a display information processing device that generates a display image corresponding to information to be displayed;
a display unit that displays the display image in a peripheral visual field area outside the central visual field while driving,
4. The display information processing device comprises data storage means for the transition moving image, and image processing means for superimposing or synthesizing the transition moving image at the start of display of the image of the horizontally written character string. The information display device for automobiles according to any one of Claims 1 to 3. The data storage means stores a plurality of transition moving image data with different transition patterns and/or colors, and the image processing means selects and superimposes or synthesizes transition moving images according to information to be displayed. 5. The vehicle information display device according to claim 4, comprising: A method of displaying information to an automobile driver, comprising:
displaying information in horizontal text in the peripheral vision area outside the central vision while driving; and
Displaying a transition animation of geometric figure elements superimposed or synthesized on the display area of the character string at the start of display of the character string,
The information display method for an automobile, wherein the transition moving image expands the horizontal width of the graphic element from a start value to a maximum value, then shrinks and disappears, and displays the character string along with the reduction and disappearance. 7. The information display method for an automobile according to claim 6, wherein the horizontal width of said graphic element expands from the starting end side in the writing direction of said character string and shrinks and disappears toward the trailing end side. 7. The information display method for an automobile according to claim 6, wherein the horizontal width of said graphic element has a maximum value at said starting value and shrinks and disappears toward the end side in the writing direction of said character string.

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