JP6122694B2 - In-vehicle display device - Google Patents

Description

  The present invention relates to a vehicle-mounted display device that is used by being installed on an instrument panel in a vehicle interior.

  Conventionally, as this type of vehicle-mounted display device, a first display that displays a first display image behind a half mirror is disposed in a tilted posture inside a panel cover having an open front. Proposed is to synthesize and display the first display image and the second display image by arranging a second display that displays the second display image at the front upper part of the half mirror (For example, refer to Patent Document 1). This in-vehicle display device includes a ring-shaped reflection member disposed between the first display and the half mirror, and the reflection member is transmitted through the half mirror and incident from the second display. The third display image surrounding the outer edge of the composite display image is displayed by receiving and shining a part of the light.

  In the vehicle-mounted display device schematically configured as described above, the half mirror transmits the first display image to the observer side and observes the second display image with respect to the observer viewing the inside of the opening of the panel cover. By reflecting on the user side, a composite display image is formed by combining the first display image and the second display image on the half mirror. In addition, the reflecting member receives a part of the light from the second display that is incident through the half mirror and reflects it to the viewer side, so that the ring-shaped member disposed in front of the first display Since the reflecting member shines, the third display image is displayed so as to surround the outer edge of the composite display image. At that time, the second display image is displayed at the deepest position as a virtual image, and the first display image and the third display image are sequentially displayed at the front position, so that the display is not flat. Display with a three-dimensional appearance and sharpness can be realized.

JP-A-2005-291718

  In the conventional in-vehicle display device described in Patent Document 1, a part of the light from the second display that is incident on the ring-shaped reflecting member disposed in front of the first display through the half mirror. Therefore, the observer can recognize the presence of the reflecting member even in a dark place such as at night when there is little or no external light. However, part of the light from the second display that shines the reflecting member is reflected on the surface of the half mirror, and the reflected light reduces the contrast between the reflecting member and the surrounding area. There was a problem of becoming.

  The present invention has been made in view of the situation of the prior art as described above, and an object of the present invention is to provide an in-vehicle display device capable of illuminating a decorative ring arranged around a composite display image without impairing visibility. Is to provide.

In order to achieve the above object, a vehicle-mounted display device according to the present invention includes a first display that is arranged in a standing posture and displays a first display image, and is substantially orthogonal to the first display. A second display that is disposed at the front position and displays a second display image; and a half mirror that is disposed in an inclined posture so as to obliquely cross a space between the first and second displays. A decorative member disposed in front of the first display, and a light source for irradiating the decorative member with light. The half mirror transmits the first display image to an observer side and transmits the first display image. 2 is a vehicle-mounted display device in which a composite display image obtained by combining the first and second display images is displayed by reflecting the second display image to the viewer side . the rear end portion closer to the first display device and the rear end portion of the half-mirror A light shielding member disposed between, and so as to place the light source behind the light shielding member.

In the in-vehicle display device configured as described above, the half mirror disposed obliquely in the space sandwiched between the first display and the second display that are substantially orthogonal to each other observes the first display image. By transmitting the second display image to the viewer side and reflecting the second display image to the viewer side, a composite display image obtained by combining the first display image and the second display image is formed. Since the decorative member arranged in front is viewed through the half mirror, the observer can view a display image with a stereoscopic effect. The light shielding member is interposed between the end portion after the rear portion and the half mirror closer to the first display in the second display, the light source provided behind the light shielding member Because the light is directly applied to the decorative member without being incident on the half mirror, the presence of the decorative member can be conspicuous even in a dark place such as at night, and a display with excellent visibility can be achieved by suppressing a decrease in contrast. be able to.

  In the above configuration, the second display is a liquid crystal display or an organic EL display, and the display screen of the second display is partitioned into an image display area and a light emitting area by a light shielding member. If the light emitted from the light source is a light source, the decorative member can be illuminated with light of any color emitted from the light emitting region of the second display.

  In addition, in the above configuration, when the second display is a liquid crystal display in which a liquid crystal panel and a backlight are stacked, a part of the backlight protrudes from the liquid crystal panel to form an exposed portion, and is emitted from the exposed portion. If the emitted light is used as a light source, the decorative member can be illuminated with a single color of light emitted from the backlight.

  Further, in the above configuration, a light guide is provided inside the decoration member, and one end side of the light guide is opposed to the light source, and the other end side of the light guide is provided on the front surface of the decoration member. Since the light is emitted from the interior of the decoration member to the front of the illumination section, the illumination section of the decoration member can be used as an indicator or the like.

  Further, in the above configuration, the decorative member is a decorative ring that can be arranged at a position surrounding at least a part of the outer edge of the composite display image, and the front surface of the decorative ring is inclined at an acute angle with respect to the light of the light source. Since the light from the light source is irradiated on the entire front surface of the decorative ring, the entire front surface of the decorative ring can be illuminated with substantially uniform brightness.

  In this case, the entire decorative ring having a uniform wall thickness may be inclined with respect to the display screen of the first display, but the back of the decorative ring faces substantially parallel to the display screen of the first display. In addition, when the decorative ring has a shape that is tapered toward the light source in a side view, the light from the light source is directed to the front surface of the decorative ring by directing the sharp end of the decorative ring toward the light source. Irradiation can be performed efficiently.

  In the above configuration, the first and second displays and the half mirror are covered with a panel cover having an opening, and the second display is disposed on the inner bottom surface side of the panel cover. If a half mirror is installed between the upper end of the light-shielding member standing from the rear end side of the second display and the upper side of the opening, it is difficult for sunlight to be directly incident on the half mirror in the forward tilt posture Therefore, reflection of sunlight can be suppressed even if the amount of protrusion of the visor required for the panel cover is reduced.

  In this case, if an optical film that restricts the light transmission direction is laid on the display screen of the second display, the second display directs from the second display to the viewer side through the opening. The display image of the second display is blocked by the optical film, and the optical film can pass only the second display image from the second display toward the half mirror. It can obscure existence.

In the in-vehicle display device of the present invention, a half mirror is disposed obliquely in a space sandwiched between a first display and a second display that are substantially orthogonal to each other, and a combined display of the first and second display images. None to display an image, provided with a light shielding member between the end portion after the rear portion and the half mirror of the second display unit, arranged a light source for irradiating light to the decorative member to the rear of the light shielding member As a result, the light from the light source is directly applied to the decorative member placed behind the half mirror, so that the presence of the decorative member can be conspicuous even in dark places such as at night, and the reduction in contrast can be suppressed. Display with excellent visibility.

1 is an external perspective view of a vehicle-mounted display device according to a first embodiment of the present invention. It is a longitudinal cross-sectional view of the vehicle-mounted display apparatus shown in FIG. It is explanatory drawing which shows the display content of this vehicle-mounted display apparatus. It is a longitudinal cross-sectional view of the vehicle-mounted display apparatus which concerns on the example of 2nd Embodiment of this invention. It is a longitudinal cross-sectional view of the vehicle-mounted display apparatus which concerns on the example of 3rd Embodiment of this invention. It is a longitudinal cross-sectional view of the vehicle-mounted display apparatus which concerns on the 4th Example of this invention.

  Embodiments of the invention will be described with reference to the drawings. First, the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. As shown in FIG. 1, the in-vehicle display device 1 according to the present embodiment is placed in front of the driver's seat in the passenger compartment. A panel cover 2 having a rectangular opening 2a, used on an instrument panel that is positioned, a first display 3 disposed on the back side of the panel cover 2, and an inner bottom surface of the panel cover 2 The second display 4 disposed on the side, the half mirror 5 disposed obliquely across the first and second displays 3, 4, and the first display 3 An annular decorative ring (decorative member) 6 or the like disposed in front is provided.

  The panel cover 2 is composed of a housing formed of a light-shielding resin, and a visor 2b is provided on the front surface so as to surround the opening 2a. The visor 2b protrudes forward of the panel cover 2 so as to block direct incidence of sunlight, and the protruding amount is set so that the top surface side is the largest. A horizontally long plate-shaped light shielding member 11 made of a light shielding resin or the like is disposed inside the panel cover 2, and the light shielding member 11 is positioned below the lower side of the opening 2 a at a predetermined distance from the back surface of the panel cover 2. Are facing each other.

  The half mirror 5 is a known beam splitter in which the intensity of reflected light and transmitted light is substantially the same, and the upper end of the half mirror 5 is supported on the back side of the front surface of the panel cover 2 at a position above the upper side of the opening 2a. . The lower end of the half mirror 5 is supported by the upper end of the light shielding member 11, and the light shielding member 11 functions as a support member that supports the half mirror 5.

  The decorative ring 6 is disposed above a space sandwiched between the light shielding member 11 and the back surface of the panel cover 2, and decorative plating or the like is applied to the outer surface thereof. The decoration ring 6 is opposed to the display screen 7a of the first liquid crystal panel 7 with a certain interval, and the decoration ring 6 surrounds an outer edge of a composite display image described later.

  The first display 3 comprises a color type liquid crystal display having a first liquid crystal panel 7 having a rectangular display screen and a first backlight 8 laminated and integrated on the back surface thereof. The display screen 7a of one liquid crystal panel 7 is exposed from a rectangular opening (not shown) formed on the back surface of the panel cover 2 and directly faces the opening 2a. The display screen 7a displays various information related to the state of the vehicle, for example, a first display image such as travel speed, engine speed, fuel remaining amount, engine oil remaining amount, navigation screen, and the like. The image passes through the half mirror 5 and is viewed by an observer in the passenger compartment. The first indicator 3 is provided with a pointer that rotates using a motor as a drive source, and the traveling speed and engine rotation are determined by a pointer-type display image obtained by combining this pointer and the first display image on the display screen 7a. A number or the like may be displayed.

  The second display 4 is composed of a color type liquid crystal display having a second liquid crystal panel 9 having a rectangular display screen and a second backlight 10 laminated and integrated on the back surface thereof. The display screen of the second liquid crystal panel 9 is orthogonal to the display screen 7 a of the first liquid crystal panel 7. The second liquid crystal panel 9 is disposed below the light shielding member 11, and the display screen of the second liquid crystal panel 9 is partitioned into a front image display area 9a and a rear light emitting area 9b by the light shielding member 11. ing.

  A second display image, which is various information related to the state of the vehicle, is displayed in the image display area 9a of the second liquid crystal panel 9, and the second display image is an optical film laid on the image display area 9a. After passing through 12, the light is reflected by the half mirror 5 in the direction of the opening 2a. This optical film 12 is a film having a blind function for limiting the light transmission direction, and in this embodiment, LCF (Light Control Film, registered trademark of 3M USA) is used. Therefore, when the observer views the first display 3 through the opening 2a, the second display image is a virtual image in front of the display screen 7a of the first liquid crystal panel 7 (position indicated by a broken line V in FIG. 2). Therefore, the observer can visually observe a combined display image obtained by combining the first display image of the first liquid crystal panel 7 and the second display image of the second liquid crystal panel 9.

  FIG. 3 shows an example of such a composite display image. In this case, a scale of the engine speed and a pointer are displayed as a first display image in a circular area surrounded by the decorative ring 6, and the vehicle runs in the center. Since the speed (56 Km / h) and the shift position (D range) are displayed as the second display image, the composite display image can be conspicuously separated from the surrounding screen by the decoration ring 6. In addition, the engine speed and the traveling speed are displayed as a second display image in a circular area surrounded by the decoration ring 6, and a navigation screen is displayed in the display area S indicated by a two-dot chain line on the side of the decoration ring 6. Can be displayed as the first display image. Alternatively, the first display image and the first display image may be displayed in such a manner that a scale of the engine speed and the traveling speed is displayed as a first display image and a pointer is displayed as a second display image in a circular area surrounded by the decoration ring 6. Various composite display images can be displayed by combining the two display images.

  On the other hand, the light emitting area 9b of the second liquid crystal panel 9 is a light emitting portion that does not participate in the composite display image. It has come to be. At this time, since the light shielding member 11 is erected in front of the light emitting region 9b, the light emitted from the light emitting region 9b, which is the light source P, is not directly observed by the observer, and the light from the light emitting region 9b is not observed. The outer surface of the decorative ring 6 can be directly irradiated. Further, since the light emitting region 9b is a part of the display screen of the second liquid crystal panel 9, it is possible to irradiate the outer surface of the decorative ring 6 with light of any color.

  As described above, in the in-vehicle display device 1 according to the present embodiment, the half mirror 5 disposed obliquely between the first display 3 and the second display 4 is the first display. By transmitting the first display image of the display 3 to the viewer side and reflecting the second display image of the second display 4 to the viewer side, the first display image and the second display image are displayed. Since a combined composite display image is formed and the outer edge of the composite display image is surrounded by an annular decorative ring 6, the observer can view the display image with a stereoscopic effect. In addition, a liquid crystal display in which the second liquid crystal panel 9 and the second backlight 10 are laminated and integrated is used as the second display 4, and the display screen of the second liquid crystal panel 9 is displayed as an image by the light shielding member 11. Since the lower end of the half mirror 5 is supported by the light shielding member 11 while being divided into the region 9a and the light emitting region 9b, the light emitted from the light emitting region 9b is used as the light source P and the light is directly incident on the half mirror 5. It is possible to directly irradiate the outer surface of the decorative ring 6 without any problem. Therefore, even in a dark place such as at night when there is little or no external light, only the decorative ring 6 can be brilliant to increase the contrast with the surrounding display screen. It can be clearly recognized. In addition, since the light emitting area 9b, which is a part of the display screen of the second liquid crystal panel 9, is used as the light source P, it is not necessary to separately provide a light source and the configuration can be simplified, and the light in the light emitting area 9b can be simplified. Thus, the outer surface of the decorative ring 6 can be shined with an arbitrary color.

  In the in-vehicle display device 1 according to the present embodiment, the second liquid crystal panel 9 and the second backlight 10 are disposed on the inner bottom surface side of the panel cover 2 having the opening 2a, and the second liquid crystal. Since the half mirror 5 is disposed in a forward-tilting posture between the light shielding member 11 standing from the display screen of the panel 9 and the upper side of the opening 2a, the amount of protrusion of the visor 2b protruding forward in the upper part of the opening 2a is relatively small. Even if it is set to a small value, it becomes difficult for sunlight to be directly incident on the half mirror 5, and it is possible to suppress a decrease in visibility due to the reflection of sunlight. However, the second display 4 (the second liquid crystal panel 9 and the second backlight 10) can be arranged on the top surface side of the panel cover 2, and in this case, the half mirror 5 has an opening portion. Since it arrange | positions with the back leaning attitude | position which inclines diagonally backward from the lower side of 2a, in order to suppress the reflection in the half mirror 5, it is necessary to enlarge the protrusion amount to the front of the visor 2b.

  Further, since the optical film 12 that restricts the light transmission direction is laid on the display screen (image display area 9a) of the second liquid crystal panel 9 disposed on the inner bottom surface side of the panel cover 2, the optical film 12 By using this blind function, the second display image on the second liquid crystal panel 9 can be transmitted only in the direction of the half mirror 5. Therefore, when the observer views the second liquid crystal panel 9 through the opening 2a, the second display image is blocked by the optical film 12 and cannot be directly seen, and the second liquid crystal panel is not visible to the observer. The presence of 9 can be obfuscated.

  In the first embodiment described above, a liquid crystal display (second liquid crystal panel 9 and second backlight 10) is used as the second display 4. However, an organic EL display is used instead of the liquid crystal display. Can be used, and in this case, the backlight can be omitted.

  FIG. 4 is a vertical cross-sectional view of the in-vehicle display device 20 according to the second embodiment of the present invention, and portions corresponding to those in FIG.

  In the in-vehicle display device 20 according to the second embodiment, the second liquid crystal panel 9 and the second backlight 10 constituting the second display 4 are not the same size, and the second backlight The light 10 is provided with an exposed portion 10a projecting rearward from the second liquid crystal panel 9, and light emitted from the exposed portion 10a is used as a light source P, which is different from the first embodiment described above. Other than that, the configuration is basically the same. In this case, since the single color light (white light) is emitted from the exposed portion 10a serving as the light source P, the outer surface of the decorative ring 6 can be shined with a single color. In addition, since it is not necessary to provide the light emitting area 9b in the second liquid crystal panel 9, the entire display screen of the second liquid crystal panel 9 can be used as the image display area 9a. In addition, it is also possible to make the outer surface of the decorative ring 6 shine with a desired color by attaching a colored filter to the exposed portion 10a.

  FIG. 5 is a vertical cross-sectional view of the in-vehicle display device 30 according to the third embodiment of the present invention, and portions corresponding to those in FIG.

  The in-vehicle display device 30 according to this embodiment differs from the first embodiment in that the shape of the decorative ring 6 is tapered toward the light source P (light emitting region 9b) in a side view. Other than that, the configuration is basically the same. That is, the decorative ring 6 is formed in a triangular shape in a side view in which the wall thickness is gradually reduced from the upper end to the lower end, and one side of the triangle is opposed to the display screen of the first display 3 in parallel. Is disposed above the light emitting region 9b. Accordingly, the front surface of the decoration ring 6 is inclined at an acute angle with respect to the surface of the light emitting region 9b, which is the light source P, and the light from the light source P is efficiently applied to the entire front surface of the decoration ring 6. The entire front surface can be illuminated with substantially uniform brightness.

  FIG. 6 is a longitudinal sectional view of the in-vehicle display device 40 according to the fourth embodiment of the present invention. The parts corresponding to those in FIG.

  The in-vehicle display device 40 according to this embodiment is different from the third embodiment in that a light guide 13 is provided inside a decorative ring 6 formed in a triangular shape in side view, and the lower end of the light guide 13 is provided. The side is made to face the light source P (light emitting region 9b) through the condenser lens 14, and the front end side of the light guide 13 is made to face the illumination part 6a of the decorative ring 6. Are the same. A plurality of illumination parts 6a are provided along the circumferential direction on the front surface of the annular decorative ring 6, and for example, a scale of engine speed (0, 1, 2,... 8) that is a composite display image shown in FIG. ) Each illumination part 6a of the decoration ring 6 is made to coincide with the position. If comprised in this way, the light of the light source P will not only be irradiated to the whole front surface of the decoration ring 6, but also from the inside of the decoration ring 6 to the front of the illumination part 6a via the condensing lens 14 and the light guide 13. Since the light from the light source P is emitted, the illumination portion 6a of the decorative ring 6 can be used as an indicator or the like.

  In the fourth embodiment, a light transmissive member such as an optical fiber is used as the light guide 13, and the light illuminating portion 6a of the decorative ring 6 is formed with a light shielding synthetic resin at the tip of the light transmissive member. Although the decorative ring 6 itself is made of a light-transmitting synthetic resin, it can also be used as a light guide, and the front surface other than the illumination part 6a is shielded by plating or the like to condense light. It is also possible to configure so that light incident on the decorative ring 6 from the lens 14 is emitted from the illumination unit 6a.

  Note that the triangular decoration ring 6 described in the third and fourth embodiments is applied to the vehicle-mounted display device 20 according to the second embodiment, and the sharp lower end of the decoration ring 6 is used as a light source. You may make it oppose to the exposed part 10a of the 2nd backlight 10 which is P. In this case, since the front surface of the decorative ring 6 is inclined at an acute angle with respect to the surface of the exposed portion 10a, the entire front surface of the decorative ring 6 can be illuminated with a single color.

  Further, in each of the above-described embodiments, the case where only one annular decoration ring 6 is arranged in front of the first display 3 has been described. However, a pair of left and right decorations is provided in front of the first display 3. The ring 6 may be disposed, and a composite display image related to the engine speed, the traveling speed, or the like may be displayed in a circular area surrounded by the two decorative rings 6. Further, the decoration ring 6 as a decoration member is not necessarily an annular shape as long as it surrounds at least a part of the outer edge of the composite display image, and a decoration ring having a semicircular arc shape or the like can also be used. Alternatively, for example, the decorative member may have a shape other than a ring shape in the shape of a character or various marks, and such a decorative member may be disposed at a position overlapping the composite display image or outside the composite display image.

  Further, in each of the above-described exemplary embodiments, the case where the decoration ring (decoration member) 6 surrounding the outer edge of the composite display image is always in the same position has been described, but one or more decoration members are used as a drive source. It may be possible to move in a direction parallel to the display screen of the first display 3 and change the stop position of the decorative member according to the display content of the composite display image. In this case, since the light emitting area 9b of the second liquid crystal panel 9 used as the light source P and the exposed portion 10a of the second backlight 10 are extended over the entire movement range of the decorative member, the decorative member is The light from the light source P can be directly applied to the outer surface of the decorative member regardless of the position at which it is stopped.

DESCRIPTION OF SYMBOLS 1,20,30,40 Vehicle-mounted display apparatus 2 Panel cover 2a Opening part 2b Visor 3 1st indicator 4 2nd indicator 5 Half mirror 6 Decoration ring (decoration member)
6a Illuminating part 7 First liquid crystal panel 7a Display screen 8 First backlight 9 Second liquid crystal panel 9a Image display area 9b Light emitting area 10 Second backlight 10a Exposed part 11 Light shielding member 12 Optical film 13 Light guide Body 14 Condenser lens P Light source

Claims (8)

A first display that is arranged in a standing posture and displays a first display image, and a second display that is arranged at a front position substantially orthogonal to the first display and displays a second display image A half mirror arranged in an inclined posture so as to cross the space sandwiched between the first and second indicators obliquely, a decorative member arranged in front of the first indicator , A light source for irradiating the decoration member with light, and the half mirror transmits the first display image to the viewer side and reflects the second display image to the viewer side, An in-vehicle display device that displays a combined display image obtained by combining the second display images ,
Said light-shielding member between the rear end portion of the half mirror and the rear end portion closer to the first display is provided in the second indicator, and placing the light source behind the light shielding member A vehicle-mounted display device.   The in-vehicle display device according to claim 1, wherein the second display is a liquid crystal display or an organic EL display, and the display screen of the second display is an image display area and a light emitting area by the light shielding member. The in-vehicle display device is characterized in that the light emitted from the light emitting region is the light source.   2. The in-vehicle display device according to claim 1, wherein the second display is a liquid crystal display in which a liquid crystal panel and a backlight are stacked, and an exposed portion that protrudes from the liquid crystal panel is provided in the backlight. The in-vehicle display device characterized in that the light emitted from the unit is the light source.   The in-vehicle display device according to claim 2 or 3, wherein a light guide is provided inside the decorative member, and one end of the light guide is opposed to the light source, and the other end of the light guide is disposed on the other end. An in-vehicle display device characterized by facing an illumination part provided on the front surface of the decorative member.   The in-vehicle display device according to any one of claims 2 to 4, wherein the decorative member is a decorative ring that can be disposed at a position surrounding at least a part of an outer edge of the composite display image, and the front surface of the decorative ring. Is inclined at an acute angle with respect to the light of the light source. The in-vehicle display device according to claim 5, wherein a back surface of the decoration ring is opposed to the display screen of the first display device substantially in parallel, and the decoration ring is pointed toward the light source in a side view. An in-vehicle display device characterized by having a narrowed shape.   The in-vehicle display device according to any one of claims 1 to 6, wherein the first and second indicators and the half mirror are covered by a panel cover having an opening, and the inside of the panel cover The second indicator is disposed on the bottom surface side, and the half mirror is installed between the upper end of the light shielding member and the upper side of the opening that stands up from the rear end side of the second indicator. An in-vehicle display device characterized by being made.   8. The in-vehicle display device according to claim 7, wherein an optical film that restricts a light transmission direction is laid on a display screen of the second display.