JP2017203894A - Head-up display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head-up display capable of displaying virtual images at different distances from a viewer by a simple configuration.SOLUTION: A display device 11 has a first display region displaying a first image M1 and a second display region displaying a second image M2. A light guide display part 12 is disposed in front of the second display region and includes: a plurality of light receiving parts for receiving the light of the second image M2 displayed by the second display region; a plurality of light guide parts for respectively guiding the light received by the plurality of light receiving parts toward the front of the second display region; and a plurality of display parts for respectively radiating the light guided by the plurality of light guide parts to display a third image M3 based on the second image M2 displayed by the display device 11. A relay optical part 13 (14) directs the light of the first image M1 displayed by the display device 11 and the light of the second image M2 displayed by the light guide display part 12 toward a transmissive reflection part 2 located in the visual line direction of a viewer, and allows the viewer to visually recognize a first virtual image V1 and a second virtual image V2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a head-up display that generates a virtual image in front of a viewer.

  A conventional head-up display is disclosed in Patent Document 1, for example. The head-up display receives a projection light that emits projection light that displays a display image at a predetermined position, and receives projection light that is emitted from the projection unit, and combines at least a part of the incident projection light. An imaging position adjusting unit that converts the image distance into a plurality of first projection light and second projection light having different imaging distances, a first screen that images the first projection light, and a second projection light A relay optical unit that directs light of images formed on the first screen and the second screen to a viewer and visually recognizes virtual images at different distances from the viewer; A plurality of virtual images are generated from a single projection unit (display device).

Japanese Patent Laying-Open No. 2006-45252

  However, the head-up display described in Patent Document 1 requires many components such as a projection unit that emits projection light, a plurality of screens, and an imaging position adjustment unit that changes the imaging position of the projection light. However, there is a risk that the volume becomes large.

  Therefore, the present invention has been made in view of this problem, and provides a head-up display that can display virtual images with different distances from a viewer with a simple configuration.

In order to solve the above problems, the head-up display of the present invention has a first display area (15, 25) for displaying the first image (M1) and a second display for displaying the second image (M2). Display areas (16, 26), and indicators (11, 21),
A plurality of light receiving sections (17, 26) disposed in front of the second display area (16, 26) and receiving the light of the second image (M2) displayed by the second display area (16, 26). 27) and a plurality of light guides (18, 28) for guiding the light received by the plurality of light receiving parts (17, 27) toward the front of the second display area (16, 26), respectively. And a third image (based on the second image (M2) displayed by the display (11, 21), which emits the light guided by the light guides (18, 28), respectively. A plurality of display units (19, 29) for displaying M3), and a light guide display unit (12, 22) provided with;
The light of the first image (M1) displayed by the display (11, 21) and the light of the second image (M2) displayed by the light guide display unit (12, 22) are visually recognized. And a relay optical unit (13, 14) directed to a transmission / reflection unit located in the direction of the person's line of sight.

  Virtual images at different distances from the viewer can be displayed with a simple configuration.

It is the schematic of the head-up display of 1st embodiment of this invention. It is a perspective view which shows the indicator and light guide display part of embodiment same as the above. It is a perspective view which shows the display apparatus of embodiment same as the above. It is the schematic of the head-up display of 2nd embodiment of this invention. It is a perspective view which shows the display apparatus of embodiment same as the above.

  Hereinafter, a first embodiment and a second embodiment of a head-up display (hereinafter referred to as HUD) 1 of the present invention will be described with reference to the accompanying drawings.

  1 to 3 are diagrams for explaining the HUD 1 of the first embodiment of the present invention, and FIGS. 4 and 5 are diagrams for explaining the HUD 1 of the second embodiment of the present invention. In the display device 10 in the HUD 1 of the first embodiment, the first image M1 displayed by the display 11 and the third image M3 displayed by the light guide display unit 12 are displayed on substantially parallel surfaces. On the other hand, in the display device 20 in the HUD 1 of the second embodiment, the first image M1 displayed by the display 21 and the third image M3 displayed by the light guide display unit 22 are displayed on non-parallel surfaces. It is different in point.

  The HUD 1 of the present invention is mounted on, for example, an automobile. As shown in FIGS. 1 and 4, the display device 10 (20), the first relay optical unit 13, and the second relay optical unit 14. And a control board (not shown). The display device 10 (20) displays the first image M1 and the third image M3. The first relay optical unit 13 and the second relay optical unit 14 transmit the first display light N1 of the first image M1 and the second display light N2 of the third image M3 to the viewing direction of the viewer E. Projecting to the transmissive reflection unit 2 located at The display device 10 (20) displays the first image M1 as the third image so that the optical path length of the first display light N1 to the viewer E is longer than the optical path length of the second display light N2. Display farther than M3.

  As shown in FIGS. 2 and 5, the display device 10 (20) includes a display 11 (21) that displays a first image M 1 and a second image M 2 that are real images on the surface, and a display 11 ( 21) is arranged in front of the first relay optical system 13 and guides the light of the second image M2 displayed by the display 11 (21) to the front, and then the display 11 (21). The light guide display unit 12 (22) displays the third image M3 based on the second image M2 on the first relay optical unit 13 side of the display surface.

  The display 11 (21) is a display that displays a real image on a display surface, and is configured by, for example, an LCD or an organic EL panel. The display surface of the display 11 (21) includes a first display area 15 (25) for displaying the first image M1, a second display area 16 (26) for displaying the second image M2, At least. The display surface of the display 11 (21) has, for example, a rectangular shape, the first display area 15 (25) has a gate shape with a part of the rectangular shape cut out, and the second display area 16 (26) is a rectangular shape corresponding to the cutout portion of the first display area 15 (25).

  The light guide display unit 12 (22) is an aggregate of fibers having an optical fiber function, and guides light received from one end inside and emits it from the other end. The light guide display unit 12 (22) is formed of, for example, urexite, a face plate, or a member having a similar optical fiber function. The light guide display unit 12 (22) is disposed in front of the second display region 16 (26) for displaying the second image M2 on the display 11 (21) (on the first relay optical unit 13 side). The plurality of light receiving portions 17 (27) that receive the light of the second image M2 displayed on the second display region 16 (26), and the light received by the plurality of light receiving portions 17 (27) are displayed on the second display region 16. A plurality of light guides 18 (28) that respectively guide light toward the front of (26) and light guided by the plurality of light guides 18 (28) are emitted, and the display 11 (21) displays the light. A plurality of display portions 19 (29) for displaying a third image M3 based on the second image M2 to be provided.

FIG. 2 is a perspective view showing the display 11 and the light guide display unit 12 in the display device 10 according to the first embodiment of the present invention.
The plurality of light receiving portions 17 (27) of the light guide display portion 12 (22) are attached to the second display region 16 (26) of the display 11 (21) as shown in FIG. Specifically, the light receiving unit 17 (27) is bonded to the second display region 16 (26) of the display 11 (21) using a translucent adhesive. The light guide display unit 12 (22) is fixed by a rigid holding unit (not shown) so that the light receiving unit 17 (27) is in close contact with the second display region 16 (26) of the display 11 (21). May be. The pitch at which the plurality of light receiving portions 17 (27) are arranged may be equal to or less than the pitch of the pixels 11p of the display 11 (21). Thereby, it is possible to prevent the resolution of the third image M3 displayed by the light guide display unit 12 (22) from being lowered with respect to the resolution of the second image M2 displayed by the display 11 (21). it can.

  Further, as shown in FIGS. 3 and 5, the light guide display unit 12 (22) has a black low reflectance part 18 a (28 a) on the outermost side surface of the plurality of light guide units 18 (28). Provide. The low reflectivity portion 18a (28a) may exhibit a low reflectivity function by painting, film, or surface texturing. By providing the low reflectance part 18a (28a), the first display light N1 emitted from the first display region 15 (25) of the display 11 (21) is converted into a plurality of light guide parts 18 (28). It is possible to prevent the side surface of the light guide portion 18 (28) from being visually recognized by the viewer E.

  The 1st relay optical part 13 is a plane mirror which has a flat reflective surface, and is the 1st display of the 1st image M1 displayed on the 1st display area 15 (25) of the indicator 11 (21). The light N1 and the second display light N2 of the third image M3 displayed on the display unit 19 (29) of the light guide display unit 12 (22) are reflected toward the second relay optical unit 14. .

  The second relay optical unit 14 is formed by forming a reflective film on the surface of a base material made of, for example, a synthetic resin material, and the first display light N1 reflected by the first relay optical unit 13 and the second display. It is a mirror having a concave free-form surface that further reflects the light N2 and emits it toward the windshield 2. The first display light N1 and the second display light N2 reflected by the second relay optical unit 14 pass through the light transmitting part of the housing of the HUD 1 and reach the windshield 2. The first display light N1 and the second display light N2 reflected by the windshield 2 form a first virtual image V1 and a second virtual image V2 at the front position of the windshield 2. Thereby, the HUD 1 can cause the viewer E to visually recognize both the virtual image V (the first virtual image V1 and the second virtual image V2) and the outside scene actually existing in front of the windshield 2. The second relay optical unit 14 has a function as a magnifying glass, enlarges the first image M1 and the third image M3 displayed on the display device 11 (21), and moves toward the windshield 2 side. reflect. That is, the first virtual image V1 and the second virtual image V2 visually recognized by the viewer E are images obtained by enlarging the first image M1 and the third image M3 displayed by the display 11 (21). The second relay optical unit 14 also has a function of reducing distortion of the first virtual image V1 and the second virtual image V2 caused by the windshield 2 having a curved surface.

  The above is description of HUD1 in this embodiment, However, This invention is not limited by the said embodiment and drawing. Of course, changes (including deletion of components) can be added to these. An example of a modification is shown below.

  In the above embodiment, the display surface that displays the first image M1 and the display surface that displays the third image M3 are flat surfaces, but may be formed as curved surfaces.

  In the said embodiment, although the 1st relay optical part 13 was comprised with the plane mirror and the 2nd relay optical part 14 was comprised with the concave mirror, one mirror (reflection type relay optical part) may be abbreviate | omitted, A new reflection-type relay optical unit may be added. In addition, a refractive relay optical unit such as a lens may be substituted, or a refractive relay optical unit may be newly added.

DESCRIPTION OF SYMBOLS 1 HUD (head up display), 10 display apparatus, 11 indicator, 12 light guide display part, 13 1st relay optical part, 14 2nd relay optical part, 15 1st display area, 16 2nd display Area, 17 light receiving section, 18 light guide section, 19 display section, 20 display device, 21 display, 22 light guide display section, 23 first relay optical section, 24 second relay optical section, 25 first display Area, 26 second display area, 27 light receiving section, 28 light guide section, 29 display section, M1 first image, M2 second image, M3 third display image, N1 first display light, N2 second Display light, V virtual image, V1 first virtual image, V2 second virtual image

Claims (4)

A display (11) having a first display area (15, 25) for displaying the first image (M1) and a second display area (16, 26) for displaying the second image (M2). 21) and
A plurality of light receiving portions (17, 27) disposed in front of the second display region and receiving the light of the second image displayed by the second display region, and the light receiving portions received by the plurality of light receiving portions A plurality of light guides (18, 28) for respectively guiding light toward the front of the second display area, and the light guided by the plurality of light guides, respectively; A light guide display unit (12, 22) for providing a plurality of display units (19, 29) for displaying a third image (M3) based on the second image to be displayed;
A relay optical unit that directs the light of the first image displayed by the display unit and the light of the second image displayed by the light guide display unit to a transmission / reflection unit positioned in the viewing direction of the viewer ( 13 and 14)
A head-up display. The outermost side surface of the plurality of light guides is provided with a black low reflectance part (18a, 28a).
The head-up display according to claim 1. The pitch at which the plurality of light receiving units are arranged is equal to or less than the pitch of the pixels of the display.
The head-up display according to claim 1, wherein the head-up display is provided. The light guide display unit is provided with the light receiving unit and the display unit non-parallel.
The head-up display according to claim 1, wherein the head-up display is provided.

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