JP2019123470A - Image display system - Google Patents

Abstract

To reduce a load to a driver when the driver views a display image while driving a vehicle.SOLUTION: An image display system mounted on a vehicle comprises: an imaging element 11 that captures an image of a subject around the vehicle; a processing circuit 12 that generates a second image which is a horizontally inverted image of a first image captured by the imaging element 11; a display element 14 that displays the second image generated by the processing circuit 12; and a reflection member 18 that is positioned to receive display light emitted from the display element 14 and reflects the display light to a driver.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an image display system mounted on a vehicle.

  There is known an image display system, so-called camera monitoring system (CMS), which causes an image captured by a camera to be displayed on a display element in place of a rearview mirror (rearview mirror) of a vehicle.

  CMS is expected to improve safety by reducing blind spots when driving a vehicle, improve fuel efficiency by reducing aerodynamic drag of the vehicle, and improve safety by improving the visibility of the rear view by displaying an image processed image. Currently, automobile manufacturers and electrical equipment manufacturers are promoting development. The CMS includes, for example, an imaging system (camera), an image processing system that processes a captured image, and a display system that displays the processed image.

  Further, in the CMS, a display screen is installed at the upper part of the speed display meter or beside the driver's seat, and an LCD (liquid crystal display) monitor or an organic EL display monitor can be used for the display screen.

  However, since these LCD monitors and organic EL display monitors allow the driver to look directly at the display screen, the display screen gaze state of the CMS from the forward gaze state (state focused on a distance) when driving the vehicle At the same time as switching the line of sight to a state (focused close), it is necessary for the driver to refocus his / her field of view, which acts as a load on the driver.

  In addition, it is difficult to make the shapes of the LCD monitor and the organic EL display monitor described above into any shape. Therefore, it is difficult to add design to the display screen.

JP, 2016-39587, A

  The present invention provides an image display system capable of reducing the load given to the driver when viewing a display image while driving.

  An image display system according to an aspect of the present invention is an image display system mounted on a vehicle, and includes a first imaging element for imaging an object around the vehicle, and a first imaging element imaged by the first imaging element. A first processing circuit that generates a second image obtained by horizontally reversing an image, a first display element that displays the second image generated by the first processing circuit, and display light emitted from the first display element And a first reflecting member for reflecting the display light toward the driver.

  According to the present invention, it is possible to provide an image display system capable of reducing the load given to the driver when viewing a display image while driving.

FIG. 1 is a block diagram of an image display system according to a first embodiment. BRIEF DESCRIPTION OF THE DRAWINGS The schematic which shows an example of the vehicle 1 carrying an image display system. The schematic diagram explaining the structure of a right side reflecting member and a left side reflecting member. BRIEF DESCRIPTION OF THE DRAWINGS Typical sectional drawing of an image display system. Sectional drawing of a liquid crystal display element and a backlight. The schematic diagram explaining the virtual image reflected to a concave mirror. The schematic diagram explaining an example of the image which an image display system displays. FIG. 6 is a diagram for explaining an example of an image displayed by a display element. 6 is a flowchart illustrating the operation of the image processing circuit. Typical sectional drawing explaining a mode that a driver | operator visually recognizes a part of image displayed by a display element. Typical sectional drawing explaining the area | region of the image which a driver | operator sees among the images displayed by a display element. Typical sectional drawing of the image display system which concerns on 2nd Embodiment. Typical sectional drawing explaining a mode that a driver | operator visually recognizes a part of image displayed by a display element. Typical sectional drawing explaining the area | region of the image which a driver | operator sees among the images displayed by a display element. The typical sectional view of the image display system concerning a 3rd embodiment. The schematic diagram explaining the virtual image reflected to a plane mirror. Typical sectional drawing explaining a mode that a driver | operator visually recognizes a part of image displayed by a display element. Typical sectional drawing explaining the area | region of the image which a driver | operator sees among the images displayed by a display element.

  Hereinafter, embodiments will be described with reference to the drawings. However, the drawings are schematic or conceptual, and the dimensions and proportions of the drawings are not necessarily the same as the actual ones. Further, even when the same part is shown in the drawings, the dimensional relationships and ratios may be expressed differently. In particular, some embodiments described below illustrate apparatuses and methods for embodying the technical idea of the present invention, and the technical idea of the present invention depends on the shape, structure, arrangement, etc. of components. Is not to be identified. In the following description, elements having the same function and configuration are given the same reference numerals, and redundant description will be made only when necessary.

First Embodiment
[1] Configuration of Image Display System 10 [1-1] Block Configuration of Image Display System 10 The image display system 10 is mounted on a vehicle. Vehicles are automobiles such as four wheels, and include automobiles powered by an internal combustion engine, electric vehicles powered by an electric motor, hybrid vehicles combined with an internal combustion engine and a motor, and the like. The image display system 10 is also called a camera monitoring system (CMS). The image display system 10 provides the driver with an image captured by a camera as an indirect view instead of the rearview mirror (rearview mirror).

  FIG. 1 is a block diagram of an image display system 10 according to the first embodiment. FIG. 2 is a schematic view showing an example of a vehicle 1 on which the image display system 10 is mounted. The image display system 10 includes a right side imaging device 11-R, a left side imaging device 11-L, a right side image processing circuit 12-R, a left side image processing circuit 12-L, a right side driving circuit 13-R, and a left side driving circuit 13-L, A right display element 14-R, a left display element 14-L, a voltage generation circuit 15, an operation unit 16, and a control circuit 17 are provided.

  The right side imaging device 11-R is mounted on the right side of the vehicle 1 and in front of the driver's seat, as shown in FIG. The right imaging element 11-R captures an object present in the right imaging region IR1. The imaging element 11-R is configured by a camera.

  The left imaging element 11 -L is mounted on the left side of the vehicle 1 and in front of the driver's seat. The left imaging element 11-L captures an object present in the left imaging region IR2. The left imaging element 11-L is configured by a camera.

  The right side image processing circuit 12-R receives data of an image captured by the right side imaging device 11-R. The right side image processing circuit 12-R performs predetermined image processing using the image data.

  The left image processing circuit 12-L receives data of an image captured by the left imaging element 11-L. The left image processing circuit 12-L performs predetermined image processing using the image data.

  The right side drive circuit 13-R drives the right side display element 14-R. Specifically, the right side drive circuit 13-R controls the alignment of the liquid crystal layer included in the right side display element 14-R, for example, by applying a voltage to the plurality of electrodes included in the display element 14-R. . The left side drive circuit 13-L drives the left side display element 14-L.

  The right side display element 14 -R and the left side display element 14 -L display an image. The right side display element 14 -R and the left side display element 14 -L are formed of, for example, liquid crystal display elements.

  The voltage generation circuit 15 generates a plurality of voltages necessary for the operation of the image display system 10 using an external power supply. The voltage generated by the voltage generation circuit 15 is supplied to each module in the image display system 10, particularly to the drive circuits 13-R and 13-L.

  The operation unit 16 receives an operation of a driver or the like. The operation unit 16 generates a control signal corresponding to the operation of the driver or the like, and sends this control signal to the control circuit 17. The control signal sent from the operation unit 16 to the control circuit 17 includes information for moving an area of an image visually recognized by the driver.

  The control circuit 17 generally controls the operation of the image display system 10. The control circuit 17 can control the image processing circuits 12 -R and 12 -L and the drive circuits 13 -R and 13 -L based on the control signal sent from the operation unit 16.

[1-2] Structure of Image Display System 10 Next, the structure of the image display system 10 will be described. The image display system 10 further includes a right reflecting member 18-R and a left reflecting member 18-L. FIG. 3 is a schematic view illustrating the configuration of the right side reflecting member 18-R and the left side reflecting member 18-L. FIG. 3 illustrates the dashboard 3, the windshield 4, the steering wheel 5 and the like provided in the vehicle 1.

  The right reflecting member 18 -R is disposed on the dashboard 3 of the vehicle 1. In addition, the right side reflection member 18 -R is disposed on the right side of the steering wheel 5 when viewed from the driver. The right side reflection member 18-R is fixed at the position shown in FIG. 3 using a fixing member (not shown). The right side reflection member 18-R has a function of reflecting the display light emitted from the right side display element 14-R toward the driver.

  The left reflecting member 18 -L is disposed on the dashboard 3 of the vehicle 1. Further, the left reflecting member 18 -L is disposed on the left side of the steering wheel 5 when viewed from the driver. That is, the right side reflecting member 18-R and the left side reflecting member 18-L are disposed so as to sandwich the steering wheel 5 as viewed from the driver. The left reflecting member 18-L is fixed at the position shown in FIG. 3 using a fixing member (not shown). The left side reflecting member 18 -L has a function of reflecting the display light emitted from the left side display element 14 -L toward the driver.

  FIG. 4 is a schematic cross-sectional view of the image display system 10. In the description of the present embodiment, when describing the common function of the left side imaging device 11-L and the right side imaging device 11-R, only the numbers are displayed by omitting the end sign like “imaging device 11” The description regarding such description is common to each of the left imaging device 11 -L and the right imaging device 11 -R. The same applies to other trailing signed references. That is, the display element 14 of FIG. 4 corresponds to one of the right side display element 14-R and the left side display element 14-L.

  The display element 14 is housed in the dashboard 3 of the vehicle 1. The display element 14 is fixed at the position shown in FIG. 4 using a fixing member (not shown).

  The reflective member 18 is disposed on the dashboard 3. The reflecting member 18 is fixed at the position shown in FIG. 4 using a fixing member (not shown). Also, the reflecting member 18 can change its orientation and angle, and its orientation and angle are held so as to be adjustable. The reflecting member 18 reflects the display light emitted from the display element 14 toward the driver 2. The reflecting member 18 is configured of, for example, a concave mirror. By forming the reflecting member 18 with a concave mirror, it is possible to magnify the image.

  The dashboard 3 has an opening 3A through which display light emitted from the display element 14 passes. The opening 3A may be closed by a transparent member (for example, transparent resin) that transmits light.

  With the arrangement shown in FIG. 4, the driver 2 can visually recognize the virtual image reflected on the reflecting member 18 without much shifting the line of sight from the background visually recognized through the windshield 4.

[1-3] Configuration of Display Element 14 Next, the configuration of the display element 14 will be described. The display element 14 is configured of, for example, a liquid crystal display element. The image display system 10 includes a liquid crystal display element 14 and a lighting device (backlight) 19. FIG. 5 is a cross-sectional view of the liquid crystal display element 14 and the backlight 19.

  The backlight 19 is a surface light source that emits light to the back of the liquid crystal display element 14. As the backlight 19, for example, a direct type or side light type (edge light type) LED backlight is used.

  The liquid crystal display element 14 includes a TFT substrate 20 on which a TFT, a pixel electrode and the like are formed, and a color filter substrate (CF substrate) 21 on which a color filter, a common electrode and the like are formed and which is disposed opposite to the TFT substrate 20. Each of the TFT substrate 20 and the CF substrate 21 is formed of a transparent substrate (for example, a glass substrate or a plastic substrate). The TFT substrate 20 is disposed to face the backlight, and illumination light from the backlight is incident on the liquid crystal display element 14 from the TFT substrate 20 side. Of the two main surfaces of the liquid crystal display element 14, the main surface on the opposite side to the backlight is the display surface of the liquid crystal display element 14.

  The liquid crystal layer 22 is filled between the TFT substrate 20 and the CF substrate 21. Specifically, the liquid crystal layer 22 is sealed in a region surrounded by the TFT substrate 20 and the CF substrate 21 and a sealing material (not shown). In the liquid crystal material constituting the liquid crystal layer 22, the alignment of the liquid crystal molecules is manipulated in response to the electric field applied between the TFT substrate 20 and the CF substrate 21 to change the optical characteristics. As a liquid crystal mode, various liquid crystal modes such as a VA (Vertical Alignment) mode, a TN (Twisted Nematic) mode, and a homogeneous mode can be used.

  The sealing material is made of, for example, an ultraviolet curable resin, a thermosetting resin, or a combination of ultraviolet and thermal curing resin, and is applied to the TFT substrate 20 and the CF substrate 21 in the manufacturing process and then cured by ultraviolet irradiation or heating. It is done. In the sealing material, a gap material such as glass fiber or glass bead is dispersed to set a gap (gap) between the TFT substrate and the CF substrate to a predetermined value. In addition to or instead of mixing the gap material into the sealing material, the gap material may be disposed in the peripheral area located around the image display area.

  On the liquid crystal layer 22 side of the TFT substrate 20, a plurality of switching elements (active elements) 23 are provided. As the switching element 23, for example, a TFT (Thin Film Transistor) is used, and an n-channel TFT is used. The TFT 23 is in partial contact with the semiconductor layer, a gate electrode functioning as the scanning line GL, a gate insulating film provided on the gate electrode, a semiconductor layer (for example, an amorphous silicon layer) provided on the gate insulating film. And a source electrode and a drain electrode spaced apart from each other. The source electrode is electrically connected to the signal line SL.

  An insulating layer 24 is provided on the TFT 23. A plurality of pixel electrodes 25 corresponding to a plurality of pixels are provided on the insulating layer 24. A contact plug (contact hole) 26 electrically connected to the pixel electrode 25 is provided in the insulating layer 24 and on the drain electrode of the TFT 23.

  A color filter 27 is provided on the liquid crystal layer 22 side of the CF substrate 21. The color filter 27 includes a plurality of colored filters (colored members), and specifically includes a plurality of red filters 27-R, a plurality of green filters 27-G, and a plurality of blue filters 27-B. A common color filter is composed of three primary colors of light, red (R), green (G) and blue (B). An adjacent set of three colors of R, G, B is a display unit (pixel), and a single monochromatic portion of R, G, B in one pixel is a minimum called a sub-pixel (sub-pixel) It is a drive unit. The TFTs 23 and the pixel electrodes 25 are provided for each sub-pixel. In the following description, a sub-pixel is referred to as a pixel unless a distinction between a pixel and a sub-pixel is particularly required.

  A black matrix (light shielding film) 28 for light shielding is provided at the boundary between the red filter 27 -R, the green filter 27 -G, and the blue filter 27 -B and the boundary between pixels (sub-pixels). That is, the black matrix 28 is formed in a mesh shape. The black matrix 28 is provided, for example, to shield unnecessary light between the coloring members and to improve the contrast.

  A common electrode 29 is provided on the color filter 27 and the black matrix 28. The common electrode 29 is planarly formed on the entire display area of the liquid crystal display element 14.

  A retardation plate 30 and a polarizing plate 32 are provided on the side of the TFT substrate 20 opposite to the liquid crystal layer 22. A retardation plate 31 and a polarizing plate 33 are provided on the opposite side of the CF substrate 21 to the liquid crystal layer 22. The retardation plate 30 and the polarizing plate 32 constitute a circularly polarizing plate, and the retardation plate 31 and the polarizing plate 33 constitute a circularly polarizing plate.

  Each of the polarizing plates (linear polarizers) 32 and 33 has a transmission axis and an absorption axis orthogonal to each other in a plane orthogonal to the traveling direction of light. Each of the polarizing plates 32 and 33 transmits linearly polarized light (linearly polarized light component) having a vibration plane parallel to the transmission axis among light having vibration planes in random directions, and a vibration plane parallel to the absorption axis Absorbs linearly polarized light (linearly polarized light component). The polarizing plates 32 and 33 are disposed such that their transmission axes are orthogonal to each other, that is, in a crossed nicol state. The relationship between the transmission axes of the polarizing plates 32 and 33 is appropriately set according to the liquid crystal mode.

  The retardation plates 30, 31 have refractive index anisotropy, and have slow axes and fast axes that are orthogonal to each other in the plane. The retardation plates 30 and 31 have a predetermined retardation (a retardation of λ / 4 when λ is a wavelength of light passing through) between light of a predetermined wavelength passing through the slow axis and the fast axis, respectively. Have a function to give. That is, the phase difference plates 30 and 31 are formed of λ / 4 plates. The slow axes of the retardation plates 30 and 31 are set to approximately 45 ° with respect to the transmission axes of the polarizing plates 32 and 33, respectively.

  In addition, the angle which prescribes | regulates the polarizing plate and phase difference plate mentioned above shall include the difference | error which can implement | achieve a desired operation | movement, and the difference | error resulting from a manufacturing process. For example, the aforementioned approximately 45 ° includes the range of 45 ° ± 5 °. For example, the orthogonal mentioned above shall include the range of 90 ° ± 5 °.

  The pixel electrode 25, the contact plug 26, and the common electrode 29 are made of a transparent electrode, and for example, ITO (indium tin oxide) is used. A transparent insulating material is used as the insulating layer 24, and, for example, silicon nitride (SiN) is used.

[2] Operation of Image Display System 10 The operation of the image display system 10 configured as described above will be described. FIG. 6 is a schematic view for explaining a virtual image reflected on the concave mirror (reflection member) 18. In FIG. 6, the image 40 displayed by the display element 14 and the virtual image 41 visually recognized by the driver 2 are illustrated by arrows. “F” in FIG. 6 is the focal point of the concave mirror (reflection member) 18, and “o” in FIG. 6 is the center of curvature of the concave mirror 18. The center of curvature of the concave mirror is the center of a spherical surface (curvature circle) in contact with the pole (or the vicinity of the pole) where the optical axis intersects with the concave mirror.

  The display element 14 displays the image 40. That is, the position of the image 40 in FIG. 6 corresponds to the position of the display element 14. The distance L 1 from the display element 14 to the concave mirror 18 and the distance L 2 from the concave mirror 18 to the virtual image 41. The position where the virtual image 41 is visually recognized is a first straight line passing through the curvature center o and the image 40 and a second straight line extending horizontally from a point where the straight line passing through the focal point f and the image 40 reaches the concave mirror 18 It can be calculated by points.

  When a concave mirror is used as the reflecting member 18, the display element 14 is disposed closer to the concave mirror 18 than the focal point f of the concave mirror 18.

  The display light from the display element 14 is reflected by the concave mirror 18 and reaches the driver 2. The driver 2 visually recognizes the image 40 displayed by the display element 14 as a virtual image 41 reflected on the concave mirror 18. In addition, the driver 2 visually recognizes the virtual image 41 in which the image 40 is enlarged. In addition, since the driver 2 recognizes the virtual image 41 at a position having a certain distance from the concave mirror 18, the image 40 displayed on the display element 14 is a virtual image 41 having a sense of depth from the place where the concave mirror 18 is installed. Is recognized by the driver 2 as

  FIG. 7 is a schematic view illustrating an example of an image displayed by the image display system 10. FIG. 8A is a view for explaining an example of an image displayed by the left display element 14-L. FIG. 8B is a view for explaining an image displayed by the right side display element 14-R. FIG. 9 is a flowchart for explaining the operation of the image processing circuit 12. FIG. 9 is an operation common to the right side image processing circuit 12 -R and the left side image processing circuit 12 -L.

  The imaging element 11 captures an object present behind the vehicle 1. Data of an image captured by the imaging element 11 is sent to the image processing circuit 12. The image processing circuit 12 receives the first image data from the imaging device 11 (step S100). Subsequently, the image processing circuit 12 generates second image data obtained by horizontally reversing the first image data (step S101). Subsequently, the image processing circuit 12 causes the display element 14 to display an image corresponding to the second image data generated in step S101 (step S102).

  By such control, the image display system 10 can cause the driver 2 to visually recognize the image captured by the imaging device 11.

  In FIG. 8A, the area AR1 indicates a display area that can be displayed by the left display element 14-L, and the area AR2 indicates an area reflected by the left concave mirror 18-L. In FIG. 8B, an area AR3 indicates a display area that can be displayed by the right side display element 14-R, and an area AR4 indicates an area reflected on the right concave mirror 18-R.

  As shown in FIG. 8, the virtual image reflected by the concave mirror 18 is a part of the image displayed by the display element 14. That is, the display element 14 displays an image in a wider range than the virtual image seen on the concave mirror 18. In other words, the area of the concave mirror 18 is set so that the virtual image reflected by the concave mirror 18 is in a narrower range than the image displayed on the display element 14. Thereby, a virtual image can be photographed on the entire concave mirror 18.

  In addition, the shape of the concave mirror 18 does not have to be adjusted to the display area of the display element 14. Thereby, since the shape of the concave mirror 18 can be designed arbitrarily, the shape of the concave mirror 18 can have designability, and the outer shape of the image displayed by the image display system 10 has designability. Can. In the example of FIG. 7, the concave mirror 18 has a trapezoidal shape.

  Next, when the driver 2 moves, in the image displayed by the display element 14, a region of a virtual image reflected on the concave mirror 18 will be described.

  FIG. 10 is a schematic cross-sectional view for explaining how the driver 2 visually recognizes a part of the image displayed by the display element 14. FIG. 10 shows an example in which the driver 2 sees a virtual image of the concave mirror 18 at three places (shown by reference numerals 2-1 to 2-3 in FIG. 10). The display light 42-1 seen by the driver 2-1 is indicated by a solid line, the display light 42-2 seen by the driver 2-2 is indicated by a broken line, and the display light 42-3 seen by the driver 2-3 is indicated by a dashed dotted line.

  FIG. 11 is a schematic cross-sectional view for explaining the area of the image viewed by the driver 2 in the image displayed by the display element 14.

  In the image displayed by the display element 14, the area 43-1 emits the display light 42-1, the area 43-2 emits the display light 42-2, and the area 43-3 emits the display light 42- Emit 3 That is, even when the plurality of drivers 2-1 to 2-3 shown in FIG. 10 look at the concave mirror 18, it is possible to copy a virtual image on the entire concave mirror 18.

  Thus, the display element 14 displays an image in a wider range than the virtual image reflected on the concave mirror 18. Therefore, even when the driver moves or when drivers with different heights drive the vehicle, a virtual image can be taken on the entire concave mirror 18.

[3] Effects of the First Embodiment As described in detail above, in the first embodiment, the image display system 10 mounted on the vehicle includes the imaging device 11 for imaging the subject around the vehicle 1 and the imaging device 11 An image processing circuit 12 that generates a second image obtained by horizontally reversing the captured first image, a display element 14 that displays the second image generated by the image processing circuit 12, and display light emitted from the display element 14 And a concave mirror (reflecting member) 18 for reflecting display light toward the driver. Also, the concave mirror 18 is disposed on the dashboard in front of the driver. In addition, the image display system 10 includes two sets of a unit including an imaging element 11, an image processing circuit 12, a display element 14, and a concave mirror 18 for the right and the left of the vehicle.

  Therefore, according to the first embodiment, it is possible to make the driver visually recognize the virtual image reflected on the concave mirror 18 located in front of the driver. Further, a sense of depth can be added to the display image of the image display system 10. As a result, it is possible to reduce the distance for moving the focus of the visual field in a forward gaze state (a state of focusing on a distance) when driving the vehicle and a state in which the display image of the image display system 10 is viewed. As a result, the load when the driver looks at the display image of the image display system 10 can be reduced.

  In addition, the display element 14 is configured to display an image in a wider range than the virtual image reflected on the concave mirror 18. Thereby, since the shape of the concave mirror 18 can be designed arbitrarily, the shape of the concave mirror 18 can have designability, and the outer shape of the image displayed by the image display system 10 has designability. Can.

Second Embodiment
The second embodiment is a configuration example using a plane mirror as the reflecting member 18. FIG. 12 is a schematic cross-sectional view of the image display system 10 according to the second embodiment.

  The reflecting member 18 is configured of a plane mirror. The plane mirror 18 reflects the display light emitted from the display element 14 toward the driver 2. The plane mirror 18 captures an equal-magnification virtual image (a real-sized virtual image). The size of the display element 14 of the second embodiment is larger than the size of the display element of the first embodiment. The other configuration is the same as that of the first embodiment.

  FIG. 13 is a schematic cross-sectional view for explaining how the driver 2 visually recognizes a part of the image displayed by the display element 14. The display light 42-1 seen by the driver 2-1 is indicated by a solid line, the display light 42-2 seen by the driver 2-2 is indicated by a broken line, and the display light 42-3 seen by the driver 2-3 is indicated by a dashed dotted line.

  FIG. 14 is a schematic cross-sectional view for explaining the area of the image viewed by the driver 2 in the image displayed by the display element 14.

  In the image displayed by the display element 14, the area 43-1 emits the display light 42-1, the area 43-2 emits the display light 42-2, and the area 43-3 emits the display light 42- Emit 3 That is, even when the plurality of drivers 2-1 to 2-3 shown in FIG. 14 look at the concave mirror 18, a virtual image can be taken on the entire concave mirror 18.

  According to the second embodiment, the image display system 10 can be realized by using a plane mirror as the reflecting member 18 that reflects the image displayed by the display element 14 to the driver. The other effects are the same as in the first embodiment.

Third Embodiment
In the third embodiment, a plane mirror is used as the reflecting member 18, and display light emitted from the display element 14 is condensed using a lens.

  FIG. 15 is a schematic cross-sectional view of the image display system 10 according to the third embodiment.

  The reflecting member 18 is configured of a plane mirror. A convex lens 44 is provided between the display element 14 and the plane mirror 18. The convex lens 44 is fixed at the position shown in FIG. 15 using a fixing member (not shown). The convex lens 44 condenses the light emitted from the display element 14 so as to be parallel light. The display element 14 is disposed near the focal point of the convex lens 44. The display light transmitted through the convex lens 44 is reflected by the plane mirror 18 toward the driver 2.

  FIG. 16 is a schematic view for explaining the virtual image reflected on the plane mirror 18. In FIG. 16, the image 40 displayed by the display element 14 and the virtual image 41 visually recognized by the driver 2 are illustrated by arrows. “F” in FIG. 6 is the focal point of the convex lens 44, and “o” in FIG. 6 is the center of the convex lens 44.

  The display element 14 displays the image 40. The size of the virtual image 41 is calculated by the intersection of a first straight line passing through the center o of the convex lens 44 and the image 40 and a second straight line passing through a point p corresponding to the size of the image 40 on the convex lens 44 and the focal point f. Be done.

  FIG. 17 is a schematic cross-sectional view for explaining how the driver 2 visually recognizes a part of the image displayed by the display element 14. The display light 42-1 seen by the driver 2-1 is indicated by a solid line, the display light 42-2 seen by the driver 2-2 is indicated by a broken line, and the display light 42-3 seen by the driver 2-3 is indicated by a dashed dotted line.

  FIG. 18 is a schematic cross-sectional view for explaining the area of the image viewed by the driver 2 in the image displayed by the display element 14.

  In the image displayed by the display element 14, the area 43-1 emits the display light 42-1, the area 43-2 emits the display light 42-2, and the area 43-3 emits the display light 42- Emit 3 That is, even when the plurality of drivers 2-1 to 2-3 shown in FIG. 18 look at the concave mirror 18, a virtual image can be taken on the entire concave mirror 18.

  According to the third embodiment, the size of the display element 14 can be reduced as compared to the second embodiment. The other effects are the same as in the first embodiment.

[Modification]
In each of the above-described embodiments, a configuration example in which imaging devices are disposed on both sides of a vehicle is shown. The imaging device may be disposed other than on both sides of the vehicle, or may be attached to the front and rear of the vehicle. A display element and a reflecting member are provided corresponding to the imaging element, and the display element and the reflecting member are disposed at the lowest positions.

  As the display element 14, a display other than a liquid crystal display element may be used. A self-luminous display element such as an organic EL (electroluminescence) display element (organic EL display) may be used.

  The present invention is not limited to the above-described embodiment, and constituent elements can be modified and embodied without departing from the scope of the invention. Furthermore, the above embodiments include inventions of various stages, and appropriate combinations of a plurality of components disclosed in one embodiment or appropriate combinations of components disclosed in different embodiments. Various inventions can be configured. For example, even if some components are removed from all the components disclosed in the embodiment, the problem to be solved by the invention can be solved and the effects of the invention can be obtained, these components can be deleted The described embodiment can be extracted as the invention.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... driver, 3 ... dashboard, 4 ... windshield, 5 ... steering wheel, 10 ... image display system, 11 ... image pick-up element, 12 ... image processing circuit, 13 ... drive circuit, 14 ... display element, DESCRIPTION OF SYMBOLS 15 ... Voltage generation circuit, 16 ... Operation part, 17 ... Control circuit, 18 ... Reflection member, 19 ... Back light, 20, 21 ... Substrate, 22 ... Liquid crystal layer, 23 ... Switching element, 24 ... Insulating layer, 25 ... Pixel Electrodes 26 contact plugs 27 color filters 28 black matrix 29 common electrodes 30, 31 retarders 32, 33 polarizers 40 images 41 virtual images 42 display light 44 ... convex lens

Claims (8)

An image display system mounted on a vehicle,
A first imaging device for imaging an object around the vehicle;
A first processing circuit that generates a second image obtained by horizontally reversing a first image captured by the first imaging element;
A first display element for displaying the second image generated by the first processing circuit;
An image display system comprising: a first reflection member arranged to receive display light emitted from the first display element and reflecting the display light toward a driver. The image display system according to claim 1, wherein the first display element displays an image having a larger area than a virtual image reflected on the first reflection member. The image display system according to claim 1, wherein an area of the first reflection member is set so that a part of an image displayed by the first display element appears as a virtual image. The image display system according to any one of claims 1 to 3, wherein the first reflection member is a concave mirror. The image display system according to any one of claims 1 to 3, wherein the first reflection member is a plane mirror. The image display system according to claim 5, further comprising a convex lens disposed between the first display element and the first reflecting member. The image display system according to any one of claims 1 to 6, wherein the first reflection member is disposed in front of the driver. It further comprises a second imaging device, a second processing circuit, a second display device, and a second reflecting member,
The image display system according to any one of claims 1 to 7, wherein the first reflection member and the second reflection member are disposed on both sides of a steering wheel of the vehicle.