JP2013109149A - Image display device, image display method, program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display an image to be visually recognized by an observer only when the observer wants to visually recognize.SOLUTION: An image display device includes a display means for displaying an image composed of a first region and a second region on a display medium. The display means displays the first region by simultaneously irradiating light of plural color or by irradiating light of mixed color of plural color, displays the second region by irradiating the light of plural color in a time division manner, and an observer perceives the first region and the second region have the same color, and the image display device enables the observer to visually recognize a boundary shape between the first region and the second region by a color breakup phenomenon caused by a relative movement of the image and the observer's line of sight for the image.

Description

  The present invention relates to an image display device, an image display method, and a program.

  A head-up display that allows a vehicle observer (driver) to visually recognize various images has been proposed. The head-up display projects and displays an image on the front window of the vehicle so as to be superimposed on the actual scenery so that the viewer can visually recognize the image. From the viewpoint of safety, the image projected and displayed on the front window should not interfere with the observer's observation of the actual landscape.

  For example, in the technique disclosed in Patent Document 1, the clarity of an image to be projected and displayed is changed depending on whether it is the edge of the front window, thereby ensuring the visibility of the actual scenery of the observer.

  However, even at the edge of the front window, an object outside the vehicle (for example, a person or a traffic sign) that is important for the observer may appear. FIG. 1 shows an example of a conventional projected image 11 and an object 12 outside the vehicle. In the example of FIG. 1, the image 11 includes information 11 to be visually recognized by an observer and a base 12, and the information 11 is “! Mark”. The information 11 has no transparency, and the base 12 has transparency. The vehicle exterior object 12 is a sign “PARK”.

  In the example of FIG. 1, it is difficult for the observer to visually recognize the object 12 outside the vehicle. This is because the perception of the edge of the external object 12 is confused by superimposing the edge of the information 11 after the edge of the external object 12 (PARK character) is perceived. In the case of the example in FIG. 1, the safety of the observer (driver) cannot be completely ensured.

  That is, in the conventional technique, since the information 11 is always displayed, there is a problem that the viewer may have a problem in viewing the object 12 outside the vehicle.

  In view of such problems, the present invention provides an image display device, an image display method, and a program that display an image to be viewed by an observer only when the observer wants to view the image.

  In the present invention, an image display device having display means for displaying an image composed of a first area and a second area on a display medium, wherein the display means simultaneously irradiates light of a plurality of colors, or By irradiating the mixed color of the plurality of colors, the first region is displayed, and by irradiating the light of the plurality of colors in a time-sharing manner, the second region is displayed, and the first region and the first region are displayed. The two areas are perceived by the observer as having the same color, and the first area and the second area are caused by a color breaking phenomenon that occurs as a result of the relative movement of the image and the line of sight of the observer with respect to the image. An image display device that allows the viewer to visually recognize the boundary shape is provided.

  With the image display device, the image display method, and the program of the present invention, an image that should be viewed by the observer can be displayed only when the observer wants to view.

The figure which showed an example of the conventional image. The figure which showed the image display apparatus etc. of a present Example. The figure which showed the hardware structural example of the image display apparatus of a present Example. The figure which showed the example with which the scenery and image of a present Example were superimposed. The figure which showed an example of the image of a present Example. The figure which showed an example of the eyes | visual_axis of the observer of a present Example. The figure which showed an example of the stop period image of a present Example. The figure which showed an example of the movement period image of a present Example. The figure which showed the function structural example of the display means of a present Example. The figure which showed an example of the panel of a present Example. The figure which showed an example of the timing chart of irradiation of each color light of a present Example. The figure which showed an example of the light emission means of a present Example. The figure which showed an example of the light emission means of a present Example. The figure which showed an example of the timing chart of irradiation of each color light of another embodiment. The figure which showed an example of the image of another embodiment. The figure which showed an example of the image of another embodiment. The figure which showed an example of the processing flow of the image display apparatus of a present Example. The figure which showed an example of the timing chart of irradiation of each color light of another embodiment.

In each of the following embodiments, in the description of the functional configuration example and the processing flow, the same processing is given the same reference number and the same step number, and the duplicate description is omitted.
<Embodiment 1>
The image display apparatus of the present invention can be used in various situations. In the first embodiment, a case where the image display apparatus is mounted on a moving body on which an observer is on will be described. In addition, the moving body is, for example, a vehicle, and the observer is, for example, a driver.

  FIG. 2 shows the image display apparatus 101 according to the first embodiment, the observer 105, and the like. In the example of FIG. 2, the image display apparatus 101 projects and displays an image on the display medium 102. The display medium 102 is a medium on which an image is displayed. In the example of FIG. 2, the display medium 102 is a vehicle windshield having transparency. Hereinafter, the display medium 102 may be the windshield 102 and the observer may be referred to as the driver 105. Further, the driver 105 can visually recognize the scenery 104 through the windshield 102 having transparency with the eyes 103 of the driver.

  FIG. 3 shows a hardware function configuration example of the image display apparatus 101 according to the first embodiment. As shown in FIG. 3, the image display device 101 of this embodiment includes a CPU 1010, a main storage unit 1012, an auxiliary storage unit 1014, an external storage device I / F unit 1016, an image processing unit 1020, a control unit 1022, and an input unit 1024. , Including display means 1026.

  The CPU 1010 executes a program stored in the main storage unit 1012 and controls each unit, calculates data, and processes the data.

  The main storage unit 1012 is a ROM (Read Only Memory), a RAM (Random Access Memory), or the like, and is a storage device that stores or temporarily stores programs and data such as an OS and application software that are basic software executed by the CPU 1010. .

  The auxiliary storage unit 1014 is an HDD (Hard Disk Drive) or the like, and is a storage device that stores data related to application software and the like. The external storage device I / F unit 1016 is an interface (bus, Ethernet (registration) between the storage medium 1018 (for example, IC card, CD, DVD, flash memory, etc.) connected via the data transmission path and the image display device 101. Trademark), telephone line, wireless, etc.).

  Further, a predetermined program is stored in the storage medium 1018, the program is installed in the image display device 101 via the external storage device I / F unit 1016, and the installed predetermined program can be executed by the image display device 101. It becomes.

The image processing means 1020 processes various images and displays them on the display means 1026 described later. The control unit 1022 controls the display unit 1026 and the like. Various information is input to the input unit 1024. The display unit 1026 displays various images on the windshield 102.
[About image 300]
FIG. 4 shows an image 300 of the present example displayed on the windshield 102. In the example of FIG. 4A, the display unit 1026 projects and displays the image 300 on the upper left end region 300 a of the entire region of the windshield 102. Thus, by displaying the image 300 above the windshield 102, the image 300 is not superimposed on a pedestrian, which is an important vehicle outside object 203, as shown in FIG. 4B. Accordingly, the driver 105 does not interfere with the observation of the person outside the vehicle 203. However, as shown in FIG. 4B, there is a possibility of overlapping with an outside object 204 that is a traffic sign.

  FIG. 5 shows an example of the image 300 of the present embodiment. The image 300 in the example of FIG. 3 includes a first area 301 and a second area 302, and has transparency. The second area 302 is an area that is visually recognized by the driver (observer) 105. The first area 301 is an image other than the second area 302 among all areas of the image 300.

  An image is a character, figure, symbol, pattern, or a combination of at least two of these. In the example of FIG. 5, the second region 302 is a region having a “!” Mark shape. The first area 301 is an area where a “!” Mark is cut out from the entire area of the image 300.

  FIG. 6 shows an example of the line of sight 205 of the driver's eye 103. Further, it is assumed that the driver 105 recognizes that “the image 300 is displayed by the image display device 101 in the upper left region 300a of the windshield 102”. In general, during driving of the vehicle, the driver 105 moves the line of sight 205 greatly as shown in FIG.

  And the driver | operator 105 also visually recognizes the image 300 currently displayed on the upper left occasionally like the eyes | visual_axis 2052 shown with a thick line. An image during a period in which the line of sight 205 is moving on the image 300 (that is, a period in which the driver 105 is looking at the image 300) like the line of sight 2052 is referred to as a “movement period image”. In addition, when the driver 105 is viewing the image 300 but the line of sight 205 is not moving (that is, when the driver 105 is viewing the image 300 without changing the line of sight), the image is stopped. It is called a period image. The image 300 of this embodiment is visually recognized by the driver 105, unlike the moving period image and the stop period image.

  FIG. 7 shows an example of the stop period image. As shown in FIG. 7, the viewer recognizes that the second region 302 and the first region 301 have the same color and brightness. In the example of FIG. 7, the image 300 (that is, the colors of the second region 302 and the first region 301) is transmissive. Therefore, even when the vehicle outside object 204 and the image 300 are superimposed, the driver 106 can visually recognize the vehicle outside object 204. Note that in FIG. 7, the image 300 is described in gray with transparency for easy understanding of the drawing, but actually it is white with transparency.

  FIG. 8 shows an example of the movement period image. In the example of FIG. 8, when the moving direction of the line of sight 205 is the direction α, the boundary shape between the first region 301 and the second region 302 causes a color breakup phenomenon (color breaking phenomenon).

  The color breaking phenomenon is a phenomenon that occurs when the integration time ratio of the three colors on the retina of the driver's 105 eye 103 is shifted due to the movement of the line of sight 205 of the driver 105. Due to the occurrence of the color breakage phenomenon, as shown in FIG. 8, the boundary shape 305 (the contour portion of the second region 302) between the first region 301 and the second region 302 is colored, and the boundary shape 305 is shown to the driver 105. Can be visually recognized.

In the example of FIG. 8, the driver 105 can visually recognize the red boundary shape 305 </ b> R, the green boundary shape 305 </ b> G, and the blue boundary shape 305 </ b> B so as to draw a tail along the direction α due to the color breaking phenomenon. . Hereinafter, the boundary shape of each color is collectively referred to as a boundary shape 305.
[Method of Displaying Image 300]
Next, a method for displaying the image 300 will be described. The display unit 1026 projects and displays the second region 302 on the windshield 102 by irradiating light of a plurality of colors in a time division manner. The display unit 1026 displays the first region 301 on the windshield 102 by irradiating a plurality of colors at the same time or irradiating light of a mixed color of a plurality of colors. FIG. 9 simply shows a functional configuration example of the display means 1026. In the example of FIG. 9, the display unit 1024 includes a light emitting unit 10262 and a panel 10264. Then, under the control of the control unit 1022, the light emitting unit 10262 emits light to emit light, and the light is reflected by the panel 10264 to display the image 300 on the windshield 102.

  FIG. 10 shows a schematic configuration example of the panel 10264. In the example of FIG. 10, the panel 10264 is a DMD (Digital Mirror Device) panel and a single panel. A plurality of micromirror elements 10266 are two-dimensionally arrayed on the panel 10264 in the example of FIG. The micromirror element 10266 reflects the light emitted from the light emitting means 10262. The number of micromirror elements 10266 is the same as the number of pixels of the image 300 projected and displayed on the windshield 102.

  Under the control of the control unit 1022, all the micromirror elements 10266 can have their mirror surfaces directed in the first direction or the second direction.

  When the mirror surface of the micromirror element 10266 faces the first direction, the light irradiated to the micromirror element can be projected onto the windshield 102. Further, when the mirror surface of the micromirror element 10266 faces the second direction, the light irradiated on the micromirror element can be prevented from being projected onto the windshield 102. As described above, the control unit 1022 can project and display a desired image 300 on the windshield 102 by directing the direction of each micromirror element in the first direction or the second direction.

  The light emitting means 10262 can emit a plurality of colors of light and a plurality of colors of mixed colors. In this example, the plurality of colors are red, green, and blue. The mixed color of the plurality of colors is white.

  FIG. 11 shows a timing chart of light emitted from the display means 1026. In FIG. 11, light irradiation for displaying the second region 302 is different from light irradiation for displaying the first region 301. In this way, light of a plurality of colors is irradiated with the red irradiation period, the green irradiation period, the blue irradiation period, and the white irradiation period as one cycle. In the example of FIG. 11, one period is 1/60 sec. Then, the red irradiation period, the green irradiation period, the blue irradiation period, and the white irradiation period are each 1/240 sec.

  The display unit 1026 emits red light, blue light, and green light in each of the red irradiation period, the green irradiation period, and the blue irradiation period (that is, red light, blue light, and green light). The second region 302 is displayed by irradiating light in a time-sharing manner. Moreover, the 1st area | region 301 is displayed by irradiating white light in a white irradiation period.

  In this manner, the display unit 1026 displays the second region 302 on the windshield 102 by irradiating each of a plurality of colors of light (red, blue, and green in the example of FIG. 11) one by one at a predetermined interval. . The display unit 1026 displays the first region 301 on the windshield 102 by irradiating a mixed color of a plurality of colors (white in the example of FIG. 11).

  In FIG. 11, an interval time t is provided from the time when red irradiation ends to the time when green irradiation starts. If red light, blue light, and green light are continuously emitted without providing the interval time t, the lightness of the second region 302 may be stronger than the lightness of the second image. When the brightness of the second area 302 becomes stronger than the brightness of the second image, the second area is visually recognized even in the stop period image, and the state shown in FIG. 1 is obtained. Therefore, it is preferable to provide the interval time t.

  In FIG. 11, the irradiation times s of red light, blue light, and green light are all the same. However, in the case of a stop period image, the second region 302 and the first region 301 have the same color and lightness. If so, the irradiation time of red light, blue light, and green light may be different.

  In FIG. 11, irradiation is performed in the order of red light → green light → blue light → white light. However, in the case of a stop period image, the second region 302 and the first region 301 have the same color and lightness. For example, the order of irradiation light may be changed.

  For the second region 302, the front glass 300 is irradiated with three-color light at a very short period of 1/240 seconds or less. Therefore, when the image 300 is a stop period image after time integration on the retina of the eye 103 of the driver 105, the second region 302 is visually recognized as a mixed color (that is, white). Further, since the first region 301 is displayed by being irradiated with white light, the driver 105 visually recognizes that the first region 301 is white.

That is, as shown in FIG. 7, when the image 300 is a stop period image, the second region 302 and the first region 301 are visually recognized as being the same white color. Further, as shown in FIG. 8, when the image 300 is a moving period image (that is, when the driver 105 looks at the image 300), the color break phenomenon occurs in the boundary shape 305 (see FIG. 8). The boundary shape 305 can be visually recognized by the driver 105. Next, two configuration examples of the light emitting unit 10262 will be described.
[Configuration Example of First Light Emitting Unit 10262]
FIG. 12 shows a configuration example of the first light emitting means 10262. In the example of FIG. 12, the light emitting unit 10262 includes a light source 701 and a converting unit 702. Here, it is assumed that the light source 701 emits white light. The conversion unit 702 has a thin plate shape and is also called a color wheel, and includes a red filter 7021, a green filter 7022, a blue filter 7023, and a white filter 7024.

  Under the control of the control means 1022 (see FIG. 3), the conversion means 702 rotates around the shaft 7025 at a predetermined speed. Then, the light source 701 irradiates the light other than the axis 7025 of the conversion unit 702 with white light. Then, the light of each color can be irradiated to the panel 10264 in the time chart as shown in FIG. When the white irradiation period is longer than the irradiation periods of other colors as shown in FIG. 11, the conversion means 7024 may be rotated so that the white filter 7024 is exposed to white light for a longer period. . In the example of FIG. 12, the light source 701 also keeps emitting light while the image 300 is continuously displayed.

In the example of FIG. 12, the light source 701 is a white light source, and the filters of the conversion unit 7024 are a red filter 7021, a green filter 7022, a blue filter 7023, and a white filter 7024. As another example, as long as the light is converted into red light, green light, blue light, and white light by the conversion unit 702, the color of the light source 701 and the color of each filter may be anything. In the display means 1026 using the first light emitting means 10262, the conversion means 702 in the light emitting means 10262 allows light of a plurality of colors (red, green, blue) and light of a plurality of mixed colors (white). And the panel 10264 is irradiated.
[Configuration Example of Second Light Emitting Unit 10262]
Next, the second light emitting means 10262 will be described. FIG. 13 shows a functional configuration example of the second light emitting means 10262. In the example of FIG. 13, the light emitting unit 10262 includes a control unit 1022 and a plurality of light sources 704, 705, 706. The plurality of light sources 704, 705, and 706 are a red light source 704, a green light source 705, and a blue light source 706 that emit red light, green light, and blue light, respectively. In addition, the control unit 1022 controls the timing of light emission of each of the red light source 704, the green light source 705, and the blue light source 706, and thus is also referred to as a light emission control unit 1022.

  FIG. 14 shows a timing chart of light emission of each light source 704, 705, 706 of the light emission control means 1022. In the example of FIG. 14, light of a plurality of colors is irradiated with a red irradiation period, a green irradiation period, a blue irradiation period, and a white irradiation period as one cycle. One cycle is 1/60 sec. Then, the red irradiation period, the green irradiation period, the blue irradiation period, and the white irradiation period are each 1/240 sec.

  In the example of FIG. 14, the light emission control unit 1022 emits red light, blue light, and green light one by one in each of the red irradiation period, the green irradiation period, and the blue irradiation period. Is displayed. In addition, the light emission control unit 1022 causes the red light source 704, the green light source 705, and the blue light source 706 to emit light simultaneously during the white irradiation period, thereby irradiating the white light and displaying the first region 301. In the display means 1026 using the second light emitting means 10262, light of a plurality of colors (red, green, blue) is emitted by light emission of each of the light sources 704, 705, and 706, and the light sources 704 are emitted. , 705 and 706 are emitted simultaneously, and the panel 10264 is irradiated with white light.

  In addition, although the white light is emitted by causing the red light source 704, the green light source 705, and the blue light source 706 to emit light simultaneously, a white light source that emits white light may be separately provided to emit white light.

  As described above, when the first light emitting unit 10262 is used, the display unit 1026 displays the first region 301 by irradiating a mixed color (white) of a plurality of colors (red, green, and blue). . In addition, when the second light emitting unit 10262 is used, the display unit 1026 displays the first region 301 by simultaneously emitting light of a plurality of colors.

  Examples of the light emitting unit 10262 are not limited to these, and other methods may be used.

  In the above description, the plurality of colors are red, blue, and green. However, “mixed color of a plurality of light colors irradiated to display the first image” = “irradiation to display the second image” As long as the “color of light” is used, the plurality of colors may be any color.

  In FIG. 11 and the like, the time division cycle is set to “1/60 sec”. However, if the first region 301 and the second region 302 are perceived to be the same color and the color breakup phenomenon occurs, the time division cycle is performed. May be other values.

  In the image display device according to the first embodiment, the second region 302 is displayed by irradiating red, blue, and green light in a time-sharing manner. Further, the first region 301 is displayed by irradiating white light that is a mixed color of red, blue, and green, or irradiating red, blue, and green light simultaneously. Therefore, when the image 300 is transparent and the image 300 is a stop period image, the second area 302 and the first area 301 are the same color as shown in FIG. Even if the object 204 overlaps, the driver can visually recognize the object 204 outside the vehicle.

  Further, as shown in FIG. 8, when the image 300 is a moving period image, a color breakup phenomenon occurs and the driver can visually recognize the boundary shape 305. Therefore, only when the observer wants to visually recognize, the boundary shape 305 that the observer should visually recognize can be visually recognized.

In the above example, the case where the observer's line of sight moves and the image 300 is stationary has been described. As another example, even when the observer's line of sight stops and the image 300 moves, the same effect can be achieved because the color breakup phenomenon occurs. For example, the display medium is a wall (side surface of the vehicle body) of a moving object (for example, a vehicle body). In this case, if the image 300 is displayed on the wall by the image display device 101, the observer can visually recognize the boundary shape 305 even if the observer's line of sight is stopped. That is, if the display medium 102 and the observer's line of sight move relatively, the same effect can be obtained.
[Second Embodiment]
Next, a second embodiment will be described. In the second embodiment, a preferable shape of the boundary shape of the second region will be described. An image 600 is shown in FIG. 15A. The boundary shape of the second region 602 is a rectangular shape and includes a side 6022 and a side 6024. Further, it is known that a color break phenomenon does not occur in a portion (outline) parallel to the direction of the line of sight of the observer 105 in the boundary shape of the second region 602.

  FIG. 15B shows an image visually recognized by the observer 105 due to the occurrence of a color break phenomenon that occurs when the movement direction of the line of sight 205 of the observer 105 is α. As shown in FIG. 15B, when the movement direction of the line of sight of the observer is the direction α, the color break phenomenon does not occur in the side 6024 which is a portion parallel to the direction α, and the observer Cannot be seen.

  On the other hand, since the color breakage phenomenon occurs in the side 6022 that is not a portion parallel to the direction α, the observer can visually recognize the side 6022. Note that the observer 105 can visually recognize the red side 6022R, the green side 6022G, and the blue side 6022B with respect to the side 6022 due to the color breaking phenomenon.

  That is, it is preferable that the boundary shape of the second region 602 does not include a portion parallel to the relative movement direction of the observer's line of sight and the image 300. This is because, as described with reference to FIG. 15, the color break phenomenon does not occur in the portion (side 6022 in the example of FIG. 15) parallel to the observer's line of sight and the relative movement direction of the image 300. This is because it is impossible to visually recognize a portion where the color breakup phenomenon does not occur.

  FIG. 16A shows an example of another image 650. The boundary shape of the second region 652 of the image 650 is a parallelogram shape. The second area 652 does not include a portion parallel to the observer's line of sight and the relative movement direction of the image 300. FIG. 16B shows an image visually recognized by the observer due to the occurrence of the color break phenomenon that occurs when the movement direction of the line of sight of the observer is α. As shown in FIG. 16B, the color breakage phenomenon occurs in all parts of the second region 652, and the observer 105 can visually recognize all parts of the second region 652. In the example of FIG. 16B, the viewer 105 visually recognizes the red side 651R of the second region 652, the green side 651G of the second region 652, and the blue side 651B of the second region 652.

In the image display apparatus according to the second embodiment, when the movement direction of the observer's line of sight is predicted in advance, the boundary shape 305 does not include a portion parallel to the predicted movement direction of the line of sight. To. Therefore, the color breakup phenomenon can be caused in all the portions of the boundary shape 305, and the observer can recognize all the portions of the boundary shape 305.
[Embodiment 3]
In the third embodiment, the driver 105 or the like gives priority to either the scenery (video) 104 (see FIG. 2) that can be seen through the windshield 102 (display medium) or the second region 302. You can choose what to do. Hereinafter, a mode in which the boundary shape 305 of the second region 302 is viewed with priority over the landscape 104 is referred to as an image priority mode (first mode). A mode in which the landscape 104 is viewed with priority over the boundary shape 305 is set as a landscape priority mode (second mode).

  For example, when the driver 105 is driving, since it is necessary to view the landscape 104 with priority over the boundary shape 305 from the viewpoint of safety, it is preferable to select the landscape priority mode. In addition, when the vehicle on which the driver 105 is riding is stopped, it is preferable to select the image priority mode. The scenery priority mode may be automatically selected while the vehicle is driving, and the image priority mode may be automatically selected when the vehicle is stopped.

  FIG. 17 shows a processing flow of the third embodiment. First, in step S <b> 2, the display unit 1026 displays the image 300 on the windshield 102. In step S4, the CPU 1010 functions as a determination unit and determines the current mode setting. Information about the mode set by the driver 105 or the mode automatically set by the vehicle is input from the input means 1024 (see FIG. 3).

  When the CPU 1010 determines that the current mode is the image priority mode, in step S6, the control unit 1022 (see FIG. 3) performs a process for increasing the visibility of the boundary shape 305. Here, the visibility of the boundary shape 305 indicates the degree to which the observer 105 can visually recognize the boundary shape 305. If the visibility is high, it becomes easier for the observer 105 to visually recognize the boundary shape 305, and if the visibility is low, the observer 105 becomes difficult to visually recognize the boundary shape 305.

  In step S62, the control means 1022 sets a short period T (see FIG. 11) for irradiating a plurality of lights. In the example of FIG. 17, the control unit 1022 sets the cycle T = 1/120 sec. In this way, the control means 1022 can shorten the period T, thereby facilitating the color breakup phenomenon and increasing the visibility of the boundary shape 305.

  Next, in step S64, the control means 1022 sets the power of the light sources 701 and 704 to 706 (see FIG. 12 and FIG. 13) large. In the example of FIG. 17, the control unit 1022 sets light source power = 200 W. As described above, by increasing the light amount of the light source, the brightness of the second region 302 and the first region 301 can be improved, so that the visibility of the boundary shape 305 can be increased. Note that either the process of step S62 or the process of step S64 may be performed first or in parallel.

  On the other hand, when CPU 1010 determines that the current mode is the landscape priority mode, in step S8, control means 1022 performs a visibility reduction process. In step S82, the control means 1022 sets a period T (see FIG. 11) for irradiating a plurality of lights longer than that in the image priority mode. In the example of FIG. 17, the control unit 1022 sets the cycle T = 1/60 sec. In this way, by increasing the period T, the control means 1022 makes it difficult for color break-up to occur, reduces the visibility of the second region 302, and makes it easier to visually recognize the landscape 104.

  Next, in step S84, the control unit 1022 sets the power of the light sources 701 and 704 to 706 (see FIGS. 12 and 13) to be smaller than that in the image priority mode. In the example of FIG. 17, the control unit 1022 sets light source power = 100 W. Thus, since the brightness of the first region 301 and the second region 302 can be reduced by reducing the light amount of the light source, the visibility of the second region 302 is reduced and the landscape 104 is easily visible. I can do it. Note that either step S82 or step S84 may be performed first or in parallel.

  Further, the visibility increasing process in step S6 is not limited to the process in step S62 or step S64, and the visibility decreasing process in step S8 is not limited to the process in step S82 or step S84.

As described above, in the third embodiment, the control unit 1022 shows the visibility of the boundary shape when the image priority mode (first mode) is set, and the case where the landscape priority mode (second mode) is set. It is higher than the visibility 301 of the first image. Therefore, the driver 105 can further improve safety and is easy to use.
[Other Embodiments]
In FIG. 2 and the like, the display device 101 projects and displays the transmissive image 300 on the transmissive windshield 102. As another example, the display device 101 may be incorporated in a liquid crystal monitor. The liquid crystal monitor changes the amount of light emitted from the light source in the screen direction by controlling the voltage applied to the sealed liquid crystal layer.

  FIG. 18 shows an example of a timing chart of each color light when the display device 101 is incorporated in a liquid crystal monitor. The vertical axis in FIG. 18 indicates the intensity with which the first area 301 and the second area 302 are displayed on the screen. In the example of FIG. 18, in order to display the first region 301, the screen is always irradiated with red light, green light, and blue light at half intensity simultaneously. In order to display the second region 302, the screen is irradiated with red light, green light, and blue light in order at the highest intensity.

  In the image display apparatus 101 according to the present embodiment, when displaying on the liquid crystal monitor, the image 300 may be used so as not to have transparency (that is, a solid image), and the image 300 may have transparency. It may be used depending on the specification application of the liquid crystal monitor.

  In the above description, the display medium is described as having transparency such as a windshield. However, the image 300 may be displayed on a non-transparent (opaque) paper or the like.

  In FIG. 2, the image display device 101 is used as a head-up display in which the image 300 is projected and displayed on the windshield 102. However, the image display device 101 may be used as a head-mounted display.

  Further, the entire image 300 may be a binary image (for example, an image of only white or black). In this case, the second region 302 may be white and the first region 301 may be black. The entire image 300 may be a multi-valued image.

DESCRIPTION OF SYMBOLS 101 Image display apparatus 102 Display medium 103 Eye of observer 104 Scene 105 Viewer 203 Object outside vehicle 204 Object outside vehicle 205 Line of sight of observer 300 Image 301 1st area | region 302 2nd area | region 701 White light source 702 Conversion means 704 Red light source 705 Green light source 706 Blue light source 10262 Light emitting means 10264 Panel 1000 CPU
1012 Main storage means 1014 Auxiliary storage means 1016 External storage device I / F means 1018 Storage medium 1020 Image processing means 1022 Control means 1024 Input means 1026 Display means

JP 2010-234959 A

Claims (10)

An image display device having display means for displaying an image composed of a first area and a second area on a display medium,
The display means includes
By irradiating a plurality of colors of light simultaneously or by irradiating a mixed color of the plurality of colors, the first region is displayed,
By irradiating the plurality of colors of light in a time-sharing manner, the second area is displayed,
The viewer perceives that the first area and the second area are the same color,
An image display device that causes the viewer to visually recognize a boundary shape between the first region and the second region by a color break phenomenon that occurs as a result of relative movement of the image and the line of sight of the viewer with respect to the image.   The image display device according to claim 1, wherein the display unit projects and displays the transparent image on the transparent display medium. A first mode in which the viewer gives priority to the boundary shape over the video that the viewer sees through the display medium, or
It is possible to set a second mode in which the viewer prioritizes the video over the boundary shape,
The control means for increasing visibility of the boundary shape when the first mode is set to be higher than visibility of the boundary shape when the second mode is set. Image display device. The control means includes
4. The image display device according to claim 3, wherein an irradiation cycle of the light of the plurality of colors when the first mode is set is shorter than the cycle when the second mode is set. 5. .   The image display apparatus according to claim 1, wherein the boundary shape does not include a portion parallel to the relative movement direction. When the first region is displayed by being irradiated with light of the mixed color of the plurality of colors,
The display means includes
One light source,
The image display apparatus according to claim 1, further comprising conversion means for converting light from the one light source into light of the plurality of colors and light of the mixed colors of the plurality of colors. The display means includes
A plurality of light sources each emitting light of each of the plurality of colors;
The light source control means for displaying the first region by causing the plurality of light sources to emit light simultaneously and displaying the second region by causing the plurality of light sources to emit light in a time-sharing manner. The image display device according to any one of 1 to 5.   The image display device according to claim 1, wherein the plurality of colors are red, green, and blue. An image display method using an image display device having display means for displaying an image composed of a first area and a second area on a display medium,
The display means includes
By irradiating a plurality of colors of light simultaneously or by irradiating a mixed color of the plurality of colors, the first region is displayed,
By irradiating the light of the plurality of colors in a time-sharing manner, the second area is displayed so as to be perceived as the same color as the first area,
An image display method for causing the observer to visually recognize a boundary shape between the first area and the second area by a color break phenomenon that occurs as a result of a relative movement between the image and the line of sight of the observer with respect to the image. A program for causing a computer having display means for displaying an image composed of a first area and a second area on a display medium to function as a control means for controlling the display means,
The control means is for the display means.
By irradiating a plurality of colors of light at the same time or by irradiating a mixed color of the plurality of colors, the first region is displayed,
By irradiating the light of the plurality of colors in a time-sharing manner, the second area is displayed so that it is perceived as the same color as the first area,
A program for causing the observer to visually recognize a boundary shape between the first area and the second area by a color break phenomenon that occurs as a result of a relative movement of the image and the line of sight of the observer with respect to the image.

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