JP2010149580A - Information display device in vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information display device in a vehicle performing information display in a color easily recognizable to a driver even if a plurality of background colors are mixed in the display part of display information. <P>SOLUTION: The display information is projected by a head-up display 24, and a background color when a driver looks at the display part in which the head-up display 24 projects the display information 104 is detected from the position of the driver's eyes by a driver's sight line point monitoring camera 16. Moreover, when there are a plurality of background colors concerning the display, a display color selection ECU 20 allows display in a display frame 102 in a color different from background colors while allowing the projection of the display frame 102 surrounding the display information 104 to the display color selection ECU 20. Therefore, even if the plurality of background colors are mixed in the display of the display information 104, the information 104 can be displayed in a color easily recognizable to the driver by the color in the display frame 102 different from the background colors. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an in-vehicle information display device, and more particularly to an in-vehicle information display device that projects display information onto a transparent plate such as a windshield or a head-up display.

Conventionally, an in-vehicle information display device that projects display information on a transparent plate such as a windshield or a head-up display has been proposed. For example, Patent Document 1 provides a combiner that allows a driver to see a little change in line of sight, and provides an LED and an LCD that project an image onto the combiner by projecting light from a light source to a display unit. In a head-up display device provided with a display control unit for controlling and a display output unit, an external light sensor for detecting a background color of the display image is provided, and a display control unit for controlling the display color of the image projected according to the background color There is disclosed a head-up display device provided with a display output unit to improve visibility.
JP 2005-138801 A

  However, in the above technique, when a plurality of background colors are mixed in the display part of the display information, the color of each part of the display part corresponding to the color changes, so that the driver dismisses the display information in a plurality of colors. There is a problem that display information is difficult to visually recognize.

  The present invention has been made in view of such a situation, and the purpose thereof is a color that allows the driver to visually recognize the display information even when a plurality of background colors are mixed in the display portion of the display information. An object of the present invention is to provide an in-vehicle information display device capable of displaying information.

  According to the present invention, a display information projection unit that projects display information onto a transparent plate, and a background color when the information projection unit sees a display portion on which the display information is projected onto the transparent plate are detected from the position of the driver's eyes. When there are a plurality of background colors related to the background color detecting means and the display part, the display information projecting means causes the frame surrounding the display information to be projected on the transparent plate, and the display to display the frame in a color different from the background color. An in-vehicle information display device comprising color correction means.

  According to this configuration, the display information projection unit projects the display information onto the transparent plate, and the background color detection unit looks at the display portion where the information projection unit projects the display information onto the transparent plate from the position of the driver's eyes. When the background color is detected and the display color correcting means has a plurality of background colors related to the display part, the display information projecting means causes the frame surrounding the display information to be projected onto the transparent plate while Because it is displayed in a color different from the color, even if multiple background colors are mixed in the display area of the display information, the display information is displayed in a color that makes it easy for the driver to visually recognize the display information due to the color in the frame that is different from the background color. Information display can be performed.

  The present invention also provides a display information projection means for projecting display information onto a transparent plate, and a background color when the information projection means sees a display portion on which the display information is projected onto the transparent plate from the position of the driver's eyes. When there are a plurality of background color detection means for detecting and a background color related to the display region, the display information projection means projects the frame surrounding the display information onto the transparent plate and displays the frame in a color different from the background color. And a display color correction means for displaying the display information in a color different from that in the frame.

  According to this configuration, the display information projection unit projects the display information onto the transparent plate, and the background color detection unit looks at the display portion where the information projection unit projects the display information onto the transparent plate from the position of the driver's eyes. When the background color is detected and the display color correcting means has a plurality of background colors related to the display part, the display information projecting means causes the frame surrounding the display information to be projected onto the transparent plate while Since the display information is displayed in a different color from the frame and the display information is displayed in a color different from that in the frame, even if a plurality of background colors are mixed in the display area of the display information, the color in the frame different from the background color In addition, it is possible to display information in a color that makes it easy for the driver to visually recognize the display information by using a color of display information different from that in the frame.

  In this case, it is preferable that the display color correction unit applies each background color to the Munsell ring and causes the display information projection unit to display a color farthest from the arrangement of the background colors in the Munsell ring as a color in the frame.

  According to this configuration, the display color correction unit applies each background color to the Munsell ring, and causes the display information projection unit to display the color farthest from the arrangement of the background colors in the Munsell ring as the color in the frame. The color inside the body is the color that is most easily identified from each background color in the Munsell ring, and the information can be displayed in a color that makes it easier for the driver to visually recognize the display information.

  In this case, it is preferable that the display color correction unit displays either black or white as a color within the frame on the display information projection unit when each of the background colors does not fall within the range of 180 degrees in the Munsell ring. is there.

  According to this configuration, the display color correction unit causes the display information projection unit to display either black or white as the color in the frame when each of the background colors does not fall within the range of 180 degrees in the Munsell ring. When the background color cannot be differentiated from the background color, such as when each background color is evenly arranged in the Munsell ring, the frame is displayed in black or white that can be emphasized more. Can increase the sex.

  In this case, it is preferable that the display color correction means display the display information projection means with a color that is 160 to 200 degrees away from the arrangement of the colors in the frame within the Munsell ring.

  According to this configuration, the display color correction unit causes the display information projection unit to display a color that is 160 to 200 degrees away from the arrangement of the color in the frame in the Munsell ring, so that the color in the frame is the background. Since the color is the color that is most easily identified from each color and the display information is the color that is most easily identified from the color in the frame, the display information is displayed easily without being influenced by the background color.

  On the other hand, the display color correction means changes any color of the frame and display information from the currently displayed color in the Munsell ring to the color to be changed in the Munsell ring in response to the change in the background color. It is preferable to display on the display information projection means as a color that changes sequentially and continuously.

  According to this configuration, the display color correction means changes any color of the frame and the display information from the currently displayed color in the Munsell ring to the change target color in the Munsell ring with respect to the change in the background color. Since the display information projection means displays the Munsell ring as a continuously changing color sequentially, either the frame or the display information changes gradually with respect to the background color change. Visibility to a rapid color change of the background color can be ensured.

  Further, the present invention is an in-vehicle information display device that projects display information and a frame surrounding the display information onto a transparent plate, and determines colors different from a plurality of background colors as the color tone in the frame.

  According to this configuration, the display information and the frame surrounding the display information are projected on the transparent plate, and a color different from the plurality of background colors is determined as the color tone in the frame, so that a plurality of background colors are mixed. However, it is possible to display information in a color that makes it easy for the driver to visually recognize the display information due to the color in the frame that is different from the background color.

  According to the in-vehicle information display device of the present invention, even when a plurality of background colors are mixed in the display portion of the display information, it is possible to display information in a color that makes it easy for the driver to visually recognize the display information. Become.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a block diagram showing the configuration of the in-vehicle information display device of this embodiment. The in-vehicle information display device 10 according to the present embodiment is mounted on the host vehicle and projects display information on a head-up display. As shown in FIG. 1, the in-vehicle information display device 10 of this embodiment includes a driver gaze detection sensor 12, a driver attitude detection sensor 14, a driver gaze destination monitoring camera 16, a driver gaze content recognition ECU 18, a display color selection ECU 20, and a head. A driving support system such as an up display display control ECU 22, a head up display 24, a system (pcs: pre-crash safety) 31, a system (ACC: adaptive cruse control) 32, and the like is provided.

  The driver line-of-sight detection sensor 12 detects the direction of the driver's line of sight and detects which position of the driver's viewpoint is on the display area of the head-up display 24. The driver's line-of-sight detection sensor 12 can detect the driver's line-of-sight direction by, for example, recognizing a pattern of a captured driver's head image or eyeball image.

  The driver attitude detection sensor 14 detects the driver's attitude and detects where the driver's eyes are located. The driver posture detection sensor 14 can detect the position of the driver's eyes by, for example, recognizing the captured image of the driver's head.

  The driver's line-of-sight monitoring camera (background color detection means) 16 is located behind the head-up display 24 (in front of the vehicle) when the display portion of the display information displayed on the head-up display 24 is viewed from the position of the driver's eyes. This is for detecting the background color distribution. The driver's line-of-sight monitoring camera 16 can simply capture the background in front of the head-up display 24 and detect the background color distribution. Alternatively, the driver's line-of-sight monitoring camera 16 is currently viewed by the driver based on the driver's line-of-sight direction detected by the driver's line-of-sight detection sensor 12 and the driver's posture detected by the driver posture detection sensor 14. The display part of the head-up display 24 is acquired, the background ahead of the display part is imaged, and the background color distribution can be detected.

  The driver line-of-sight content recognition ECU 18 detects the driver's line-of-sight direction detected by the driver line-of-sight detection sensor 12, the driver's posture detected by the driver attitude detection sensor 14, and the driver detected by the driver's line-of-sight monitoring camera 16. This is information for collecting the background color when viewing the display part of the display information displayed on the head-up display 24 from the position of the eyes, and outputting the information to the display color selection ECU 20.

  The display color selection ECU (display color correction means) 20 includes a display command from the driving support system such as the system (pcs) 31 and the system (ACC) 32 to the head-up display 24, and a driver from the driver sight line content recognition ECU 18. The display color to be displayed on the head-up display 24 is selected based on the viewing direction, the driver's posture, and the background color.

  The head-up display display control ECU (display information projection means) 22 is for performing control for projecting display information on the head-up display 24 by the display color selected by the display color selection ECU 20.

  The head-up display (display information projection means) 24 is for projecting display information onto a transparent plate, and the driver can read the projected display information while visually checking the background in front of the transparent plate. It becomes. As the head-up display 24, a display type in which display information is projected onto a display plate separate from the windshield of the host vehicle or a type in which display information is directly projected onto the windshield of the host vehicle can be applied. .

  Hereinafter, the operation of the in-vehicle information display device 10 of the present embodiment will be described. FIG. 2 is a flowchart showing the overall operation of the in-vehicle information display device 10 according to the embodiment. As shown in FIG. 2, the driver gaze detection sensor 12 detects the driver's gaze direction (S1). The driver attitude detection sensor 14 detects the driver's attitude (S2). The driver's line-of-sight monitoring camera 16 detects the background color when viewing the display area of the display information displayed on the head-up display 24 from the position of the driver's eyes, and the driver's line-of-sight content recognition ECU detects the background color of the display area. A distribution is acquired (S3).

  The display color selection ECU 20 selects a color that opposes the background color by 180 degrees in the Munsell color ring, selects a color that maximizes the color difference, and uses it as a display color (S4). FIG. 3 is a diagram illustrating the relationship between basic background colors and display colors. As shown in FIG. 3, display information 104 “Brake!” Is displayed in the display frame 102 on the display unit 100 of the head-up display 24. In the example of FIG. 3, the background color 151 is a color that is “10P” in the Munsell ring 200. In this case, in the Munsell ring 200, the color that faces the background color 151 of “10P” by 180 degrees is “10GY”. Therefore, the display color selection ECU 20 selects “10GY” as the display color of the display information 104.

  In this case, the display color selection ECU 20 ideally selects a color that opposes the background color by 180 degrees in the Munsell color ring. Thus, a color that is 160 to 200 degrees opposite the background color in the Munsell color ring may be selected as the color of the display information 104, and more preferably, a color that is 170 to 190 degrees opposite the background color in the Munsell color ring. A color is selected as the color of the display information 104.

  When there are not a plurality of background colors in the display unit 100 (S5), the display color selection ECU 20 selects the display color of the display information 104 as shown in FIG. 3, and the head up display display control ECU 22 displays the display color. The display information 104 is displayed on the head-up display 24 (S6).

  On the other hand, when there are a plurality of background colors in the display unit 100 (S5), only the display color corresponding to the background color 151 is displayed as shown in FIG. 3 as shown in the display information 104 ′ of FIG. If it is changed, it becomes “step / break” and it becomes difficult for the driver to understand the meaning of the display information 104 ′.

  Therefore, in the present embodiment, when the display position of the display information can be changed (S7), the display color selection ECU 20 determines each meaningful part (word unit, phrase unit, context unit, frame) in the display information. Etc.) to change the display information (S8). For example, the display color selection ECU 20 changes the display color for each part that has the meaning of “brake / step on” for the display information 104 ″ shown in FIG. This makes it easier for the driver to understand the meaning of the display information 104 ″.

  On the other hand, if it is impossible to change the display position of the display information (S7), the display color selection ECU 20 changes the color of the display frame 102 "surrounding the display information 104 '' 'as shown in FIG. The display color selection ECU 20 sets the display information 104 ′ ″ to the color within the display frame 102 ″ with the maximum color difference (S9). (S9). Hereinafter, the operation in this case will be described in more detail.

  FIG. 5 is a flowchart showing details of the operation when there are many background colors in the display unit. As shown in FIG. 5, when information is provided to the driver from each of the systems 31, 32, etc. (S101), the display position of the information provided by the system 31, etc. is the entire display screen ( S102) When there are not a plurality of background colors of the driver's line of sight on the entire display screen (S103), selecting a color that is 180 degrees opposite to the background color in the Munsell ring as the display color (S104) is described above. That's right.

  When there are a plurality of background colors of the driver's line of sight on the entire display screen (S103), as shown in FIG. 6, the highlighted color is selected in the Munsell ring 200 for the background colors 153, 154, and 155 of the display unit 100. If it is possible, that is, if each of the background colors 153, 154, and 155 is within a range of 180 degrees in the Munsell ring 200 (S105), the display color selection ECU 20 selects the background colors 153 (“5R”) and 154 (“5PB”). ), 155 (“5P”), “10GY”, which is the farthest color in the Munsell ring 200, is selected as the color in the display frame 102 (S106). In this case, in the Munsell ring 200, the color that faces the color “10GY” in the display frame 102 by 180 degrees is “10P”. Therefore, the display color selection ECU 20 selects “10P” as the display color of the display information 104.

  In this case, the display color selection ECU 20 ideally selects the most distant color in the Munsell ring 200 for each of the plurality of background colors 153, 154, and 155, but the colors that the head-up display 24 can display are selected. The display frame 102 displays a color within a range of ± 20 degrees, preferably ± 10 degrees from the color farthest from the most distant color in the Munsell ring 200 with respect to each of the plurality of background colors 153, 154, and 155. You may make it select as an inside color.

  Furthermore, in this case, the display color selection ECU 20 ideally selects a color that is 180 degrees opposite to the color in the display frame 102 in the Munsell color circle as the color of the display information 104, but the head-up display 24 displays the color. Depending on the situation such as possible color restrictions, a color that opposes 160 to 200 degrees in the Munsell color ring with respect to the color in the display frame 102 may be selected as the color of the display information 104, and more preferably, the background A color that faces 170 to 190 degrees in the Munsell color circle is selected as the color of the display information 104.

  On the other hand, as shown in FIG. 7, when the emphasis color cannot be selected in the Munsell ring 200 for the background colors 153, 156, and 157 of the display unit 100, that is, the background colors 153 (“5R”) and 156 (“10B”). ), 157 (“10GY”) are not in the range of 180 degrees in the Munsell ring 200 (S105), the display color selection ECU 20 selects either the black or white color not in the Munsell ring 200 as the color in the display frame 102. (S107). In this case, the display color selection ECU 20 selects white as the display color of the display information 104 if the color in the display frame 102 is black, and black if the color in the display frame 102 is white.

  Here, when the display position of the information provided by the system 31 or the like is not the entire display screen (S102), the display color selection ECU 20 performs a process as shown in FIG. When the display position of information provided by the system 31 or the like is on the right side of the display screen (S108), and there are not a plurality of background colors of the driver's line of sight on the right side of the display screen (S109), Then, a color that faces 180 degrees in the Munsell ring is selected as a display color (S110). In the example shown in FIG. 9, on the right side of the display unit 100, the color that faces the background color 157 (“5G”) 180 degrees in the Munsell ring 200 is “5RP”. “5RP” is selected as the display color of 104 ′.

  When there are a plurality of background colors of the driver's line of sight on the right side of the display screen (S109), the display color selection ECU 20 performs the same processing as shown in S105 to S107 of FIG. 5 on the right side of the display screen (S111). To S113).

  When the display position of the information provided by the system 31 or the like is on the left side of the display screen (S108) and there are not a plurality of background colors of the driver's line of sight on the left side of the display screen (S114), Then, a color that faces 180 degrees in the Munsell ring is selected as a display color (S110). In the example shown in FIG. 9, on the left side of the display unit 100, the color that faces 180 degrees in the Munsell ring 200 with respect to the background color 158 (“10YR”) is “10B”. “10B” is selected as the display color of 104 ′.

  When there are a plurality of background colors of the driver's line of sight on the left side of the display screen (S114), the display color selection ECU 20 performs the same processing as that shown in S105 to S107 of FIG. 5 on the left side of the display screen (S111). To S113).

  Returning to FIG. 2, when the background color does not change to a display color similar to the display information during display, the display color selection ECU 20 selects the display color as it is (S11). On the other hand, when the background color is changed to a display color similar to the display color of the display information during display (S11), the display color selection ECU 20 sequentially sequentially changes the color so as to be opposite to the background color by 180 degrees in the Munsell ring. In addition, a slightly changed color is selected as a display color (S12).

  FIG. 10 is a flowchart showing details of the operation when the background color changes. As shown in FIG. 10, when the display color selection ECU 20 selects a color that is 180 degrees opposite to the background color in the Munsell ring and displays it on the head-up display 24 (S201), the background color changes. If there is (S202), the display color selection ECU 20 detects the background color distribution of the driver's line of sight after the background changes by the driver's line of sight monitoring camera 16 (S203). The display color selection ECU 20 gradually changes from a color that opposes the background color before the background change by 180 degrees in the Munsell ring to a color that opposes the background color after the background change by 180 degrees in the Munsell ring. Is displayed on the head-up display 24 (S204).

  In the example of FIG. 11, before the background change, the display color of the display information 104 with respect to the background color 159 “10RP” is the color “10G” that opposes 180 degrees in the Munsell ring 200. Here, when the background color 159 changes from “10RP” to “5RP”, “10P”, “5P”, “10PB”, the display color selection ECU 20 is 180 in the Munsell ring with respect to the background color after the background change. The display color of the display information 104 is sequentially and minutely changed from “10G” to “5G”, “10GY”, “5GY”, and “10Y”, which are colors that gradually change to opposite colors. When there are a plurality of background colors on the display screen (S205), the display color selection ECU 20 performs the same process for each color.

  The display color selection ECU 20 can perform the same process for the colors in the display frame 102. Further, the display color selection ECU 20 performs the process in the case where there are a plurality of background colors in the same manner as shown in FIGS. 5 and 8, and continuously and minutely changes the display color with respect to the background color. it can.

  According to the present embodiment, when the head-up display 24 projects display information, and the driver's line-of-sight monitoring camera 16 sees a display part on which the head-up display 24 projects the display information 104 from the position of the driver's eyes. The display color selection ECU 20 projects the display frame 102 surrounding the display information 104 to the display color selection ECU 20 when the display color selection ECU 20 has a plurality of background colors related to the display region. Since the display information 104 is displayed in a color different from the color, even if a plurality of background colors are mixed in the display portion of the display information 104, the display information 104 is visually recognized by the driver by the color in the display frame 102 different from the background color. It is possible to display information with easy-to-use colors.

  Further, according to the present embodiment, the head-up display 24 projects the display information, and the driver's line-of-sight monitoring camera 16 looks at the display part on which the head-up display 24 projects the display information 104 from the position of the driver's eyes. When the display color selection ECU 20 has a plurality of background colors related to the display part, the display color selection ECU 20 projects the display frame 102 surrounding the display information 104 and Is displayed in a color different from the background color, and the display information 104 is displayed in a color different from that in the display frame 102. Therefore, even if a plurality of background colors are mixed in the display portion of the display information 104, the background color The display information 104 is displayed in a color that makes it easy for the driver to visually recognize the display information 104 by using a different color in the display frame 102 and a different color of the display information 104 from the display frame 102. It is possible to perform.

  Further, according to the present embodiment, the display color selection ECU 20 applies each background color to the Munsell ring 200 and projects the display information as the color in the display frame 102 that is the farthest from the arrangement of each background color in the Munsell ring 200. In order to display on the means, the color in the display frame 102 is the color that can be most easily identified from each background color in the Munsell ring 200, and the information can be displayed in a color that makes it easier for the driver to visually recognize the display information 104. .

  Further, according to the present embodiment, the display color selection ECU 20 heads up using either black or white as the color in the display frame 102 when each of the background colors does not fall within the range of 180 degrees in the Munsell ring 200. In order to display on the display 24, the interior of the display frame 102 can be more emphasized when the color difference from the background color cannot be obtained, such as when the background colors are evenly arranged in the Munsell ring 200. It can be displayed in black or white and can be recognized.

  Further, according to the present embodiment, the display color selection ECU 20 causes the head-up display 24 to display a color that is 160 to 200 degrees away from the arrangement of the color in the display frame 102 in the Munsell ring 200 as the color of the display information 104. The color in the display frame 102 is the color that is most easily identified from the background colors, and the display information 104 is the color that is most easily identified from the colors in the display frame 102. It is displayed easily without being received.

  Further, according to the present embodiment, the display color selection ECU 20 changes the color of the display frame 102 or the display information 104 from the currently displayed color in the Munsell ring 200 to the Munsell ring in response to a change in the background color. Since the head-up display 24 displays the Munsell ring 200 on the Munsell ring 200 as a continuously changing color up to the change target color in 200, any one of the colors in the display frame 102 and the display information 104 with respect to the change in the background color. Therefore, the visibility with respect to the rapid color change of the background color during traveling can be ensured.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

It is a block diagram which shows the structure of the in-vehicle information display apparatus which concerns on embodiment. It is a flowchart which shows the whole operation | movement of the in-vehicle information display apparatus which concerns on embodiment. It is a figure which shows the relationship between a basic background color and a display color. It is a figure which shows a display mode when many background colors exist in a display part. It is a flowchart which shows the detail of operation | movement when many background colors exist in a display part. It is a figure which shows the display mode when the highlight color can be selected from the Munsell ring. It is a figure which shows the display mode when an emphasis color cannot be selected from the Munsell ring. It is a flowchart which shows the detail of operation | movement when the display position of each information provision is not the whole display screen. It is a figure which shows a display mode when the display position of each information provision is not the whole display screen. It is a flowchart which shows the detail of operation | movement when a background color changes. It is a figure which shows selection of the display color by a Munsell ring when a background color changes.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... In-vehicle information display apparatus, 12 ... Driver gaze detection sensor, 14 ... Driver attitude | position detection sensor, 16 ... Driver gaze destination monitoring camera, 18 ... Driver gaze content recognition ECU, 20 ... Display color selection ECU, 22 ... Head up display Display control ECU, head-up display, 31 ... system (pcs), 32 ... system (ACC), 33 ... system, 100 ... display unit, 102, 102 ', 102 "... display frame, 104, 104', 104", 104 "'... display information, 151,152,153,154,155,156,157,158,159 ... background color, 200 ... Munsell ring.

Claims (7)

Display information projection means for projecting display information onto a transparent plate;
A background color detection means for detecting a background color when the information projection means sees a display part where the display information is projected onto the transparent plate from the position of the eyes of the driver;
When there are a plurality of the background colors related to the display region, the display information projection unit projects the frame surrounding the display information onto the transparent plate and displays the frame in a color different from the background color. Display color correction means;
A vehicle information display device. Display information projection means for projecting display information onto a transparent plate;
A background color detection means for detecting a background color when the information projection means sees a display part where the display information is projected onto the transparent plate from the position of the eyes of the driver;
When there are a plurality of the background colors related to the display part, the display information projection unit causes the frame body to be displayed on the transparent plate while displaying the frame body in a color different from the background color. And display color correction means for displaying the display information in a color different from that in the frame;
A vehicle information display device.   The display color correction unit applies each of the background colors to a Munsell ring, and causes the display information projection unit to display a color farthest from the arrangement of the background colors in the Munsell ring as a color in the frame. The in-vehicle information display device according to 1 or 2.   The display color correction unit causes the display information projection unit to display either black or white as a color in the frame when each of the background colors does not fall within a range of 180 degrees in the Munsell ring. Item 4. The in-vehicle information display device according to Item 3.   5. The display color projection unit according to claim 3, wherein the display color correction unit causes the display information projection unit to display a color that is 160 to 200 degrees away from the arrangement of the color in the frame in the Munsell ring as the color of the display information. In-vehicle information display device.   The display color correction means is configured to change any color in the frame and the display information from the currently displayed color in the Munsell ring to a change target color in the Munsell ring in response to the change in the background color. The in-vehicle information display apparatus according to any one of claims 1 to 5, wherein the display information projection unit displays the Munsell ring on the display information projection unit as a color that sequentially changes.   An in-vehicle information display device that projects display information and a frame surrounding the display information onto a transparent plate, and determines a color different from a plurality of background colors as a color tone in the frame.

Images