JP6024035B2 - In-vehicle display device - Google Patents

Description

  The present invention relates to an in-vehicle display device that displays information obtained by an electronic device mounted on an automobile or the like in a vehicle.

  2. Description of the Related Art Conventionally, in-vehicle display devices that display information obtained by an electronic device mounted on an automobile or the like, apparatuses using a display element having a flat display surface such as a liquid crystal display element are mainly used. In addition, a method in which the driver of the vehicle directly installs the screen of the display element so that the screen can be visually recognized, and the driver displays the image displayed on the display element on a windshield and reflects the image. There is a head-up display system that visually recognizes as a virtual image.

  Patent Document 1 discloses a display device that includes a display element housed in a dashboard and a foldable screen. When used, the display device stands on the dashboard and projects an image of the display element from the rear. Have been described. Further, in Patent Document 2, a head-up display device in which an image of a display element installed on a dashboard is projected onto a windshield by an optical system combined with a lens, and a driver visually recognizes a reflected image from the windshield. Is described.

Japanese Patent Laid-Open No. 9-254681 JP 2009-229552 A

  The most important function required for in-vehicle display devices is that it is easy for the driver to see, and that it is compact so as not to interfere with driving and operation of other equipment, and mechanical stability. It is desirable to be. Moreover, it is desirable that installation and fixing can be easily performed so that it can be mounted on various vehicles.

  The display device described in Patent Document 1 is downsized when not in use because of the configuration in which the screen is folded. However, since the display element needs to be housed in the dashboard, it cannot be easily fixed. Further, since the display element and the screen are not integrated, the mechanical stability is insufficient. In particular, an in-vehicle display device needs stability against vibration and impact. In the display device described in Patent Document 1, since different forces are applied to the display element and the screen fixed at different locations with respect to vibration and impact applied to the vehicle body, the displayed image is blurred or distorted. There is a fear.

  The display device described in Patent Document 2 is considered to be easy to visually recognize because the image of the display element appears as an image enlarged in front of the driver. However, since a complicated optical system spatially separated from the display element is required, mechanical stability against vibration and impact is not sufficient, and installation and fixing are not easy.

  Further, in a general display device in which a liquid crystal display element or the like is placed upright on a dashboard in front of the driver, the display unit is disposed on the back side of the display element so that the driver can easily see the display unit. It is necessary to arrange the drive circuit and the like standing on the dashboard as a unit. For this reason, it is difficult to obtain all of the mechanical stability, the ease of installation and fixing, and the small shape while maintaining the visibility.

  An object of the present invention is to solve the above-described problems, and to provide an in-vehicle display device that is easy for a driver to visually recognize, is small in size, has mechanical stability, and can be easily fixed.

  In a first aspect, the present invention provides a display element having a function of displaying image information on a planar first display surface by electrical means, and image information displayed on the first display surface. A housing holding an optical element that leads to a second display surface different from the first display surface, and the housing in a state in which the driver of the vehicle can visually recognize the image information displayed on the second display surface. There is provided a vehicle-mounted display device comprising means for fixing a body in the vehicle. In the present invention, since the display surface of the display element, that is, the second display surface that is easily visible independently of the first display surface is provided, for example, the display element and its drive circuit do not consider direct visibility. This makes it possible to achieve a structure that provides mechanical stability and ease of installation and fixing. Furthermore, since the display element and the optical element guided to the second display surface are integrally held in the casing, the mechanical stability is excellent.

  In a second aspect, the present invention provides the in-vehicle display device according to the first aspect, wherein the second display surface faces the windshield side of the vehicle and the image displayed on the second display surface. Information is made visible to the driver by being reflected by the windshield. In the invention of this aspect, high visibility is obtained in the same manner as the head-up display device in which the driver visually recognizes the reflected image from the windshield. In this case, for example, the reflected image on the second display surface is viewed as it is, and another optical element such as a lens is installed in front of the second display surface to adjust the size of the image or the position of the virtual image. Is also possible. Further, for example, a film for adjusting the reflectance and transmittance of light may be provided at the reflection position of the image on the windshield.

  In a third aspect, the present invention provides the vehicle-mounted display device according to the first aspect, wherein the means for fixing is means for fixing the casing between the driver and the windshield of the vehicle. The second display surface has a function of switching between a state facing the driver side and a state facing the windshield side of the vehicle, and when the second display surface faces the driver side. When the driver can directly view the second display surface and the second display surface faces the windshield side of the vehicle, the image information displayed on the second display surface is It is visible to the driver by being reflected by the windshield. In the invention according to this aspect, the direction of the second display surface can be selected so that each driver can easily recognize the driver based on his / her viewpoint position. In addition, for example, the direction of the second display surface can be switched depending on whether driving is during the daytime or at night.

  In a fourth aspect, the present invention provides the vehicle-mounted display device according to any one of the first to third aspects, wherein the orientation of the first display surface is different from the orientation of the second display surface. Features. According to the present invention, when the housing is fixed in the vehicle in a state where the image information displayed on the second display surface is visible to the driver of the vehicle, the first display surface of the display element in the housing is displayed. There is no need to install the driver with the direction facing the driver. Therefore, the freedom degree of arrangement | positioning in the housing | casing of a display element increases, and the freedom degree of housing | casing design increases. For example, the display element can be easily arranged in a highly designable housing. Further, for example, the display surface of the display element and the substrate having the drive circuit thereof may be installed and fixed so as to be parallel to the dashboard surface, and the normal direction of the second display surface may be directed toward the driver. In this way, since the display element and the optical element are integrally held in the casing, the installation and fixing can be simplified and the degree of freedom of the installation location can be increased.

  In a fifth aspect, the present invention provides the in-vehicle display device according to any one of the first to fourth aspects, wherein the optical element is configured by bundling optical fibers, and an incident surface of the optical fiber bundle is the first side. 1 is arranged so as to face the display surface, and the exit surface of the optical fiber bundle is the second display surface. In the invention of this aspect, the image on the first display surface is raised on the second display surface and becomes visible. By configuring the optical element with a bundle of optical fibers, the direction and shape of the second display surface are not only visible, but also take into account, for example, the stability of the entire casing and the design of the casing. It becomes possible to configure more freely.

  In a sixth aspect, the present invention provides the in-vehicle display device according to the fifth aspect, wherein the display element is a dot matrix type display element that performs display control for each pixel, and the light constituting the optical fiber bundle. The outer diameter of the fiber is approximately equal to the size of the pixel. Thereby, a sharper image can be projected on the second display surface.

  In a seventh aspect, the present invention is the vehicle-mounted display device according to the fifth or sixth aspect, wherein at least a part of the light passing portion of the optical fiber bundle is colored. Make the optical fiber material that makes up the optical fiber bundle a colored material, or color the part of the light passing part of the optical fiber bundle, so that the part appears colored, so it has an illumination effect Can do.

  In an eighth aspect, the present invention relates to the in-vehicle display device according to the fifth to seventh aspects, and includes a case that covers the optical element and the housing in the vicinity of the second display surface, The surface of at least the portion of the case close to the second display surface is made of a translucent material, and the inside of the case is difficult to visually recognize from the outside of the case when the display element does not display the image information. It is characterized by being. In the invention of this aspect, it is configured so that it is difficult to visually recognize the inside from the outside of the case when the display element does not display image information, and it can be clearly visually recognized when displayed. It is good to have a configuration as described above. In the invention of this aspect, when displaying image information, the image displayed on the second display surface is a translucent case, such as a smoke-colored case or a film having a half mirror function provided on the surface of the case. Visible through. When the display element does not display image information, it is difficult to visually recognize the inside of the case from the outside of the case, and only the smoke color of the entire case is visible, so that when the image is displayed, it can be clearly recognized. A display device having excellent design can be configured.

  In a ninth aspect, the present invention provides the vehicle-mounted display device according to the eighth aspect, wherein the display element displays the image information from the outside of the case around the second display surface. The boundary is configured to be difficult to visually recognize. In the invention of this aspect, the boundary around the second display surface from the outside of the case, that is, the boundary between the second display surface and the outside thereof is difficult to see, preferably not visible. . In the invention of this aspect, even when the display element displays image information, it is difficult to visually recognize the boundary around the second display surface, so that only the displayed image information can be displayed so as to emerge from the case, A display device having better design can be configured.

  In a tenth aspect, the present invention provides the in-vehicle display device according to any one of the seventh to ninth aspects, wherein the shape of the second display surface is a curved surface, and the case is the second display surface. It has a curved surface portion similar to the curved surface in a portion close to the surface. In this way, it is possible to obtain an effect as if the case itself is displayed on the curved surface portion of the case, which is a curved surface portion similar to the curved surface of the second display surface. In the invention of this aspect, at least a portion close to the second display surface that is a curved surface may be a curved surface. For example, the case is a curved surface other than a fixed portion to the vehicle, for example, an ellipsoid. Or a sphere.

  In an eleventh aspect, the present invention provides the in-vehicle display device according to the tenth aspect, wherein the case includes the curved surface portion within a range that the driver can visually recognize together with the portion close to the second display surface. And a curved surface having continuity. In the invention of this aspect, the case has a curved surface having continuity with the adjacent portion other than the portion adjacent to the second display surface. A visual unity with other parts can be given, and a better design can be obtained. For example, the case is made of a translucent material so that the boundary inside the case and the periphery of the second display surface cannot be seen, and the portion corresponding to the second display surface of the case and the outside of the second display surface By forming the portion corresponding to で with a curved surface having continuity, the entire case can be seen as one curved body, and the image information can be seen to emerge from the case.

  In a twelfth aspect, the present invention is the vehicle-mounted display device according to the tenth or eleventh aspect, wherein the curved surface is a spherical surface. In the manufacture of the second display surface and the case, in general, a spherical surface or a sphere is easier to manufacture than a curved surface other than a spherical surface, and the manufacturing can be performed at low cost. In the invention of this aspect, at least a portion close to the second display surface that is a spherical surface may be a sphere, but for example, the case is a single continuous sphere except for the fixed portion on the lower surface. Also good. In this case, the display device appears as a black sphere when the display element does not display image information by displaying the case with a black smoke-like material or by providing a black smoke film on the surface of the case. Can be configured such that an image floats on its surface.

  In a thirteenth aspect, the present invention provides the in-vehicle display device according to any one of the first to third aspects, wherein the second display surface is a flat screen, and the optical element is the first element. The image information displayed on the display surface is formed on the screen. The invention of this aspect is similar to the configuration described in the above-described conventional Patent Document 1 in that the image information displayed on the first display surface is imaged on the screen, but in the present invention, The difference is that the display element, the optical element leading to the second display surface, and the screen are integrally held in the casing, and each part held in the casing is integrated with respect to vibration and impact applied to the vehicle body. Since it moves, there is no blurring or distortion of the display image. Thereby, the structure which can obtain mechanical stability and the simplicity of installation fixation is realizable.

  In a fourteenth aspect, the present invention is characterized in that in the in-vehicle display device according to the thirteenth aspect, an imaging magnification from the first display surface to the screen is adjustable. For example, when a lens is used as an optical element, a method of moving the position of the lens and the screen or the position of the lens and the first display surface, and the focal length and installation of the lens are available. There are a method of changing the position, a method of adjusting the imaging magnification by two or more combination lenses, a method of combining them, and the like. By making the imaging magnification adjustable in this way, the size of the display image can be easily adjusted according to the installation location of the display device in the vehicle. In general, when the display elements are the same, the brightness of the display image on the screen increases as the imaging magnification decreases. For example, the brightness and the size of the display image are taken into account in consideration of the power consumption and heat dissipation characteristics of the display element. Can be adjusted optimally.

  In a fifteenth aspect, the present invention provides the vehicle-mounted display device according to the first to fourteenth aspects, wherein the optical element is configured to be fixed to and removable from the housing. Usually, in a vehicle having a greatly different body shape or the like, since the shape of the display unit of the in-vehicle display device mounted on the vehicle is greatly different, it is necessary to change the design of the entire display device. However, in the present invention, the display element and its drive circuit board are shared, and it is possible to deal with different vehicles by exchanging optical elements. In this case, the case or screen may need to be replaced. For example, the housing can be fixed or removed as required, such as a single optical element, an optical element and case, or an optical element and screen. Such a structure may be provided in advance. As a result, it is possible to reduce development costs and product costs, and shorten the development period.

  As described above, according to the present invention, it is possible to obtain a vehicle-mounted display device that is easily visible to the driver, is small, has mechanical stability, and can be easily fixed.

It is a figure which shows the structure of the vehicle-mounted display apparatus 10 which concerns on Example 1, FIG. 1 (a) is typical sectional drawing, FIG.1 (b) is a perspective view. Explanatory drawing which shows an example in the case of installing the vehicle-mounted display apparatus 10 in a vehicle. FIG. 4 is a schematic side cross-sectional view illustrating a configuration of an in-vehicle display device 20 according to a second embodiment. Explanatory drawing which shows an example in the case of installing the vehicle-mounted display apparatus 20 in a vehicle. FIG. 5A is a schematic side cross-sectional view illustrating a configuration of an in-vehicle display device 30 according to a third embodiment, and FIG. 5A illustrates a case where the second display surface is set to face the driver side when FIG. b) shows the case where the second display surface is set to face the windshield of the vehicle. FIG. 10 is a schematic side cross-sectional view illustrating a configuration of an in-vehicle display device 40 according to a fourth embodiment. FIG. 10 is a schematic side cross-sectional view illustrating a configuration of an in-vehicle display device 50 according to a fifth embodiment. FIG. 10 is a schematic side cross-sectional view illustrating a configuration of an in-vehicle display device 60 according to a sixth embodiment.

  Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the drawings. This does not limit the present invention. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description thereof is omitted.

  1A and 1B are diagrams illustrating a configuration of an in-vehicle display device 10 according to a first embodiment. FIG. 1A is a schematic side sectional view, and FIG. 1B is a perspective view. FIG. 2 is an explanatory diagram showing an example when the in-vehicle display device 10 is installed in a vehicle. As shown in FIG. 1, the in-vehicle display device 10 is displayed on the first display surface 2 and the display element 1 having a function of displaying image information on the planar first display surface 2 by electrical means. And a housing 5 holding an optical element 4 for guiding the image information to a second display surface 3 different from the first display surface 2. Further, as shown in FIG. 2, the in-vehicle display device 10 fixes the housing 5 in the vehicle 83 in a state where the driver 80 of the vehicle 83 can visually recognize the image information displayed on the second display surface 3. It has the fixing means 6 which is a means to do.

  In this embodiment, as the display element 1, other thin types such as a dot matrix type display element that performs display control for each pixel such as a liquid crystal display element, a plasma display element, and an organic EL display element, and an organic LED display element. A display element can be used. In addition, a drive circuit board 7 for driving the display element 1 is disposed integrally with the display element 1 below the display element 1.

  The optical element 4 is configured by bundling optical fibers, the incident surface of the optical fiber bundle is disposed opposite to the first display surface 2, and the emission surface of the optical fiber bundle is the second display surface 3. In the present embodiment, the cross-sectional shape of the optical fiber bundle of the optical element 4 is rectangular as shown in FIG. The cross-sectional shape of the optical fiber bundle of the optical element 4 can be set according to the shape of the first display surface 2 of the display element 1. If the shape of the first display surface 2 is a rectangle, the same rectangle is used. If the shape is a circle, the same shape is used. Further, the image information on the first display surface 2 is enlarged or reduced to be displayed on the second display surface 3 by changing the interval between the optical fibers arranged between the incident surface and the output surface of the optical fiber bundle. It is also possible. As an optical fiber constituting the optical fiber bundle, a plastic optical fiber, a glass optical fiber, or the like can be used. After arranging the optical fiber bundle to have a predetermined cross-sectional shape and outer shape, they are integrated by fusion, etc. Is formed by processing such as cutting and polishing. In addition, since the optical fiber bundle appears to be colored by configuring the optical fiber using a coloring material, an illumination effect can be provided. Further, when the display element is a dot matrix type display element, a sharper image can be displayed on the second display surface 3 by making the outer diameter of the optical fiber constituting the optical fiber bundle substantially equal to the size of the pixel. Can be projected.

  The housing 5 is configured to hold the display element 1, the drive circuit board 7, and the optical element 4 together. Although not shown in the drawings, the housing 5 is provided with screw holes in positions facing the holes provided in the holder of the drive circuit board 7 and the display element 1, and the holder of the drive circuit board 7 and the display element 1. A screw is passed through the hole provided in the, and the screw is fixed to the screw hole of the housing 5. The incident surface of the optical element 4 is attached and fixed to the display surface 2 of the display element 1 with a transparent adhesive. In addition, the housing 5 includes a through-hole portion for exposing the optical element 4 from the housing 5. The through-hole portion has a pressing mechanism that holds the optical element 4 by sandwiching it from the periphery. In this embodiment, as shown in FIG. 1, a part of the optical element 4 is exposed from the housing 5, but a portion other than the second display surface 3 is accommodated in the housing. It may be configured.

  As shown in FIG. 2, the fixing means 6 is means for fixing the housing 5 on the dashboard 81 of the vehicle 83. The fixing position of the housing 5 is not limited to the dashboard 81 as long as the second display surface 3 is visible to the driver 80. As specific means of the fixing means 6, for example, a double-sided adhesive tape can be used in the simplest case, and when a screw hole or other attachment mechanism is provided on the dashboard, these are fitted. It may be a mounting hole or a mechanism.

  In the in-vehicle display device 10 of the present embodiment, the display element 1 and its drive circuit board 7 can be configured to realize mechanical stability and ease of installation and fixing without considering direct visibility. Furthermore, since the display element 1 and the optical element 4 are integrally held in the housing 5, the mechanical stability is excellent.

  FIG. 3 is a schematic cross-sectional side view illustrating the configuration of the in-vehicle display device 20 according to the second embodiment. FIG. 4 is an explanatory diagram illustrating an example of the case where the in-vehicle display device 20 is installed in a vehicle. is there. Also in the present embodiment, the display element 1 having the function of displaying image information on the first display surface 2 and the image information displayed on the first display surface 2 are displayed on the first display surface. 2 and a housing 15 holding an optical element 14 that leads to a second display surface 13 different from 2.

  However, in the present embodiment, as shown in FIG. 4, the second display surface 13 faces the windshield 82 side of the vehicle 83, and the image information displayed on the second display surface 13 is reflected by the windshield 82. Thus, the driver 80 is configured to be visible.

  In this embodiment, the optical element 14 is configured by bundling optical fibers, the incident surface of the optical fiber bundle is disposed opposite to the first display surface 2, and the emission surface of the optical fiber bundle is the second display surface 13. The optical fiber bundle of the optical element 14 has a rectangular cross-sectional shape, and the housing 15 is configured to hold the display element 1, the drive circuit board 7, and the optical element 14 as one unit. The same as in the first embodiment. As shown in FIG. 4, the fixing means 6 is means for fixing the casing 15 at a position on the dashboard 81 such that the second display surface 13 reflected by the windshield 82 is visible to the driver 80. The specific means is the same as in the first embodiment. In addition, since the driver | operator 80 visually recognizes a reflected image, the image displayed on the display element 1 is made into the image turned upside down compared with the case of Example 1. FIG. For example, the driver can select and install either the installation state of the first embodiment or the installation state of the present embodiment, and can select whether or not to reverse the image by switching a switch or the like that reverses the image. It is good.

  In the vehicle-mounted display device 20 of the present embodiment, high visibility can be obtained similarly to the head-up display device. In this embodiment, a lens or the like is installed in front of the second display surface 13 to adjust the size and position of the image to be viewed, and the light reflectance is reflected at the reflection position of the image on the windshield. It is also possible to adjust the ease of viewing the reflected image by providing a film for adjusting the transmittance.

  FIG. 5 is a schematic side cross-sectional view illustrating the configuration of the in-vehicle display device 30 according to the third embodiment. FIG. 5A illustrates a case where the second display surface is set to face the driver. FIG. 5B shows a case where the second display surface is set to face the windshield of the vehicle. The present embodiment also includes a housing 25 that holds the display element 1 and an optical element 24 that guides image information displayed on the first display surface 2 to the second display surface 23. Is formed by bundling optical fibers, the incident surface of the optical fiber bundle is disposed opposite to the first display surface 2, the exit surface of the optical fiber bundle is the second display surface 23, and the light of the optical element 24 The cross-sectional shape of the fiber bundle is rectangular, and the housing 25 is configured to hold the display element 1, the drive circuit board 7, and the optical element 24 together as in the first embodiment.

  However, in this embodiment, the casing 25 is fixed between the driver and the windshield of the vehicle, on the dashboard 81 in FIGS. 2 and 4, and the second display surface 23 faces the driver 80 side. It has a function of switching between a state and a state facing the windshield 82 side of the vehicle.

  Specifically, as shown in FIG. 5, a turntable 28 is installed on an inclined surface 27b of an inclined table 27 having an inclined surface 27b inclined with respect to the reference surface 27a, and the rotary table 28 is placed on the inclined surface 27b. It is configured to rotate around the central axis 29. The casing 25 is fixed on the turntable 28 and rotates together with the turntable 28. The inclination angle of the inclined surface 27b of the inclined base 27 with respect to the reference surface 27a is such that the second display surface 23 faces the driver 80 and the state shown in FIG. 5A and the vehicle windshield 82. The state shown in FIG. 5B is set so that the turntable 28 can be obtained at a position rotated 180 degrees with respect to each other, and the turntable 28 has a mechanism that can be fixed to the inclined stand 27 at the above-described rotation position. . Further, the tilt table 27 is fixed on the dashboard 81 in FIGS. 2 and 4 between the driver and the windshield of the vehicle. The fixing means is the same as the specific means of the fixing means 6 described above.

  When the second display surface 23 faces the driver, the driver can directly view the second display surface 23, and when the second display surface 23 faces the windshield side of the vehicle, The image information displayed on the display surface 2 is reflected by the windshield, so that it can be visually recognized by the driver. In the present embodiment, the image displayed on the display element 1 is when the second display surface 23 faces the driver side when the second display surface 23 faces the windshield side of the vehicle. It is necessary to set the image so that the left and right are reversed. For example, a sensor for detecting whether the state shown in FIG. 5 (a) or FIG. 5 (b) is provided, and when the state shown in FIG. 5 (a) is based on the state detected by the sensor, the image is reversed. First, in the state of FIG. 5B, it is preferable to perform control to invert the image.

  In addition, as a modification example of the structure of the in-vehicle display device according to the present embodiment, a structure in which the installation position of the turntable 28 is changed to the lower side of the tilt base 27 and the casing 25 and the tilt base 27 are rotated together, It is also possible to select a structure having a mechanism that makes the inclination angle of the inclined surface 27b of the table 27 variable.

  As described above, in the vehicle-mounted display device 30 according to the present embodiment, the direction of the second display surface 23 can be selected so that each driver can easily see based on his / her viewpoint position and the like.

  FIG. 6 is a schematic cross-sectional side view illustrating the configuration of the in-vehicle display device 40 according to the fourth embodiment. In this embodiment, the structure, configuration, and arrangement of the display element 1, the optical element 4, and the drive circuit board 7 are the same as those in the first embodiment. Further, the fixing means 6 is the same as that in the first embodiment. However, the housing 35 has a structure that accommodates the entire display element 1, the optical element 4, and the drive circuit board 7, and only the second display surface 3 is exposed from the housing 35.

  Further, in the present embodiment, a case 37 that covers the optical element 4 and the housing 35 is provided in the vicinity of the second display surface 3, and the window portion 38 of the case 37 that is close to the second display surface 3 is half-finished. The window portion 38 of the case 37 is made of a semi-transparent smoke color material so that the inside of the case 37 cannot be visually recognized from the outside of the case 37 when the display element 1 does not display image information. 37 is made of a material that is opaque and colored in the same color as the window portion 38. An example of the material is a plastic material. When the image information is not displayed, the entire case 37 looks like the above-mentioned smoke color and the same color from the outside, and when the image is displayed, the image first appears on the window portion 38, so that it is clearly recognized. And a display device having excellent design can be configured. The entire case 37 can also be smoked.

  FIG. 7 is a diagram illustrating a configuration of the in-vehicle display device 50 according to the fifth embodiment. FIG. 7A is a schematic side sectional view of a portion other than the fixing unit, and FIG. It is a perspective view. As shown in FIG. 7A, also in the present embodiment, the display element 1 similar to the first embodiment and the optical element that guides the image information displayed on the first display surface 2 to the second display surface 43. 44 and a housing 45 holding them. Further, the optical element 44 is configured by bundling optical fibers, the incident surface of the optical fiber bundle is disposed to face the first display surface 2, and the output surface of the optical fiber bundle is the second display surface 43. The cross-sectional shape of the optical fiber bundle of the optical element 44 is rectangular, and the housing 45 is configured so as to be able to hold the display element 1, the drive circuit board 7, and the optical element 44 as one unit. It is the same. However, in the present embodiment, the shape of the second display surface 43 is a spherical surface. Furthermore, it has the case 47 which covers the optical element 44 and the housing | casing 45 close to the 2nd display surface 43, and the case 47 has a spherical surface similar to the shape of the 2nd display surface 43 in all parts. It consists of a sphere.

  Further, as shown in FIG. 7B, the fixing means 46 includes a spherical concave portion 46a coinciding with the sphere, and a gel-like adhesive sheet 46b is installed on the bottom surface of the concave portion 46a. Is kept in contact with the pressure-sensitive adhesive sheet 46b, thereby maintaining its position. Further, an adhesive sheet 46c is also provided on the bottom surface of the fixing means 46, and the adhesive sheet 46c is installed at a desired position on the dashboard. Then, by setting the adhesive strength of the adhesive sheet 46c provided on the bottom surface to be stronger than that of the adhesive sheet 46b in the recess 46a, when the case 47 is lifted upward, the difference in the adhesive strength described above. The case 47 is detached from the fixing means 46, and the case 47 can be installed on the fixing means 46 in any direction.

  The case 47 is entirely colored with a semi-transparent smoke color, and is configured so that the inside of the case 47 cannot be seen from the outside of the case 47 when the display element 1 does not display image information. Further, even when the display element 1 displays image information, the boundary between the second display surface 43 and the outside thereof is not visible from the outside of the case 47. As a result, when the display element 1 does not display image information, the display device looks like a sphere colored in the above-described smoke color, and when the image information is displayed, only the image displayed on the surface of the display device 1 appears. It is configured. As the smoke color, black, metal color or the like can be selected. According to this embodiment, an in-vehicle display device having unique and excellent design and functionality can be obtained.

  FIG. 8 is a schematic cross-sectional side view illustrating the configuration of the in-vehicle display device 60 according to the sixth embodiment. As shown in FIG. 8, the in-vehicle display device 60 is displayed on the first display surface 52 and the display element 51 having a function of displaying image information on the planar first display surface 52 by electrical means. And a housing 55 that holds an optical element 54 having a function of forming an image on a screen 58 that is a second display surface different from the first display surface 52. As shown in FIG. 2, the in-vehicle display device 60 is a fixing unit that fixes the housing 55 in the vehicle 83 in a state in which the driver 80 of the vehicle 83 can visually recognize the image information displayed on the screen 58. 56. The fixing means 56 is the same means as the fixing means 6 of the first embodiment. The display element 51 may be a display element having a luminance that allows an image displayed on the screen 58 to be sufficiently recognized, and a display element for a projector or the like can be used. The display element may be used. A drive circuit board 57 for driving the display element 51 is also built in the housing 55.

  In this embodiment, the optical element 54 is configured by using a lens, and the imaging magnification from the first display surface 52 to the screen 58 is adjusted by changing the focal length and the installation position of the lens to be used. be able to. As other methods for configuring the imaging magnification to be adjustable, a method of moving the position of the lens and the first display surface 52, a method of adjusting the imaging magnification using a combination lens, or the like may be used. Further, when the in-vehicle display device 60 of this embodiment is mounted on different vehicles, the display element and its drive circuit board are made common, and the imaging magnification is changed by changing the optical element to cope with different vehicles. Is possible. In this case, the housing 55 may be provided in advance with a structure that allows the optical element 54 to be fixed and removed from different positions. As a result, the development cost and product cost can be reduced, and the development period can be shortened.

  In a conventional in-vehicle liquid crystal display device, the width and height when viewed from the front are limited by the size and arrangement of the frame part outside the display unit and the parts that fix the display unit. In the in-vehicle display device 60, since the shape of the screen 58 can be set independently of the display element 51 and the drive circuit board 57, the size when viewed from the front can be made smaller than that of the conventional display device.

  Compared to the head-up display system that projects onto a windshield or the like, the in-vehicle display device 60 according to the present embodiment does not require special consideration or adjustment for the reflective portion. On the other hand, in the display device using the conventional screen as in Patent Document 1, the display element, the optical element, and the screen are not integrated, so that an image projected on the screen is shaken or distorted by vibration, impact, or the like. However, in the in-vehicle display device 60 according to the present embodiment, since these components are integrally held by the housing 55, the above-described image disturbance does not occur.

  In the in-vehicle display device 60 of the present embodiment, the brightness can be changed by changing the imaging magnification on the screen 58 by an optical element. For example, the size of a normal display screen is 4 inches or more, but if the display screen, that is, the screen 58 is made as small as about 2 inches, the same display element 51 can be used to make the display screen brighter. Conversely, by setting the brightness and size of the display screen to optimum values, the power consumption of the display element 51 can be reduced.

  In a conventional in-vehicle liquid crystal display device, when developing an in-vehicle display device corresponding to a new vehicle or the like, it is necessary to change the liquid crystal display element itself, and a method for attaching the display element to an external component or a drive circuit board Therefore, it is necessary to change the appearance parts and the drive circuit board. On the other hand, in the in-vehicle display device 60 according to the present embodiment, the drive circuit board 57 and the display element 51 including the circuit board corresponding to the functions of the radar detector, the radio, the GPS, and the like intended for the in-vehicle display device, and the optical If the element 54 and the base portion of the housing 55 are integrated in advance, the size of the display screen can be obtained simply by adjusting and changing the optical element 54 and changing the screen 58 and appearance design. Development of new models with changed In other words, electrical parts can be integrated and unified as a unit between the models, and the mounting portion can be shared in the same shape.

  Needless to say, the present invention is not limited to the above-described embodiments, and various design changes can be made according to the purpose and application. For example, the optical element composed of the optical fiber bundle used in the above embodiment may be an optical element configured by bundling optical fibers that linearly guide from the first display surface to the second display surface. As long as the image of the first display surface can be visually recognized through the second display surface, the optical fiber bundle constituting the optical element may have any other shape. Further, as a means for fixing the optical element to the first display surface, a transparent double-sided tape may be used instead of the transparent adhesive. In this case, the optical element can be easily replaced.

DESCRIPTION OF SYMBOLS 1,51 Display element 2,52 1st display surface 3,13,23,43 2nd display surface 4,14,24,44,54 Optical element 5,15,25,35,45,55 Case 6 , 46, 56 Fixing means 7, 57 Drive circuit board 10, 20, 30, 40, 50, 60 In-vehicle display device
27 Inclined base 27a Reference surface 27b Inclined surface 28 Rotary base 29 Center shaft 37, 47 Case 38 Window portion 46a Recessed parts 46b, 46c Adhesive sheet 58 Screen 80 Driver 81 Dashboard 82 Windshield 83 Vehicle

Claims (8)

A display element having a function of displaying image information on a planar first display surface by electrical means, and a second display device that displays image information displayed on the first display surface different from the first display surface. a housing which holds an optical element for guiding the display surface, means for fixed the housing in front Symbol visible the image information displayed on the second display surface state,
A case that covers the optical element and the casing in the vicinity of the second display surface, and at least a surface of the case in the vicinity of the second display surface is made of a translucent material; display device when the device does not display the image information you characterized in that the interior of the case is configured to difficult visible from the outside of the case. When the display device has displayed the image information, from the outside of the case, according to claim 1 in which the boundary of the periphery of the second display surface, characterized in that it is configured such difficult viewing Viewing equipment. The shape of the second display surface is curved, wherein the case in the portion proximate to the second display surface, to claim 1 or claim 2, characterized in that it has the curved surface similar to the curved portion Viewing device according. The case is in the extent possible visible together with the driver is proximate to the second display surface portion, the display device according to claim 3, characterized in that it has a curved surface with a continuity with the curved surface portion . The curved surface Viewing apparatus according to claim 3 or claim 4 characterized in that it is a spherical surface. Viewing apparatus according to any one of claims 1 to 5 wherein the first display surface orientation and the second display surface orientation are different. The optical element is configured by bundling optical fibers, an incident surface of the optical fiber bundle is disposed to face the first display surface, and an output surface of the optical fiber bundle is the second display surface. Viewing apparatus according to any one of claims 1 to 6, wherein. Viewing apparatus according to any one of claims 1 to 7 at least a portion of the light passing portion of the optical fiber bundle is characterized in that it is colored.

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