JP2013180713A - On-vehicle display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle display device capable of making displays on a meter display and on a head-up display with a simple structure.SOLUTION: An on-vehicle display device 1 includes a display device 4 outputting display light LD including an image, and a screen 6 to which the display light LD of the display device 4 is projected. The screen includes two first screen 6 and second screen 7. The display device 4 outputs the display light LD for the first screen 6 and illumination light LL for the second screen 7. The display light LD forms an image on the first screen 6, and the illumination light LL illuminates the second screen 7 through transmission.

Description

  The present invention relates to an in-vehicle display device mounted on a vehicle such as an automobile.

  A conventional in-vehicle display device includes a so-called head-up display (HUD) in which various information necessary for driving is displayed on a projection member such as a windshield or a combiner of a vehicle and a meter display provided on the instrument panel of the vehicle. Display devices have been proposed. For example, see Patent Document 1. This in-vehicle display device has one display element, displays display information in a part (one) display area on the display surface of the display element in the meter display, and the part display area is Display information in another different display area is configured to be displayed in the head-up display.

JP 2002-196276 A

  However, the conventional in-vehicle display device has a complicated structure using a light splitting device, an optical lens, a mirror, etc. in order to optically split the projection light from one display element. There are various problems such as assembly and cost, and realization with a simple structure is desired.

  From another viewpoint, it is important to reduce the reading load by abstracting the display of the head-up display. For these reasons, there is a high need for a head-up display with simple display contents as well as a head-up display with high definition and high degree of freedom of expression.

  Accordingly, the present invention has been made in view of the above-described problems, and an object thereof is to provide an in-vehicle display device capable of displaying on a meter display and displaying on a head-up display with a simple structure. Is.

  The in-vehicle display device of the present invention is an in-vehicle display device having a display device that outputs display light including an image, and a screen onto which the display light of the display device is projected, the screen being a first screen, The display device outputs the display light for the first screen and the illumination light for the second screen, the display light forms an image on the first screen, and the illumination light is The second screen is transmitted and illuminated.

  In addition, a translucent plate-like member that indirectly visually recognizes the second screen as a reflected display is provided.

  Further, the first screen and the second screen are arranged at different angles.

  A lens layer is provided on the second screen.

  Further, a viewing angle control layer is provided on the second screen.

  Further, a colored layer is provided on the second screen.

  Further, the second screen is provided with a design including a transmissive portion and a non-transmissive portion.

  The first screen and / or the second screen are non-planar.

  Moreover, the irradiation area | region of the said illumination light to the said 2nd screen is selectively performed.

  Further, the color of the illumination light to the second screen is changed.

  In addition, a cycle of blinking the illumination light to the second screen is changed.

  The present invention can provide an in-vehicle display device capable of displaying on a meter display and displaying on a head-up display with a simple structure.

1 is a layout view showing a first embodiment of the present invention. The block diagram of the embodiment. Sectional drawing of the 2nd screen of the embodiment. The figure which shows the display state in the cockpit of the embodiment. The figure which shows the display state in the cockpit of the embodiment. The layout which shows 2nd Embodiment of this invention.

  Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings.

  The in-vehicle display device 1 of the present invention is mainly composed of a display device 4, a projection optical system 5, a first screen 6, and a second screen 7.

  Note that 2a to 2d are in-vehicle devices mounted on the vehicle. For example, the in-vehicle device 2a is a control device that controls the vehicle, the in-vehicle device 2b is navigation, and the in-vehicle device 2c is a speed sensor. In addition, the in-vehicle device 2d is an object detection sensor that detects an object around the vehicle. The in-vehicle device 2a receives information from the in-vehicle devices 2b to 2c.

  Reference numeral 3 denotes a display output processing means for outputting information from the in-vehicle device 2a to the display device 4 as image data. In addition, the display output processing unit 3 includes an image data correction unit 3 a and can also create image data in which display distortion generated in display on the first screen 6 and the second screen 7 is corrected.

  The in-vehicle display device 1 performs display for the user (vehicle driver in the present embodiment) via the first screen 6 and the second screen 7 based on information from the in-vehicle devices 2b to 2d. .

  The display device 4 outputs display light LD and illumination light LL including an image, and outputs image data generated by the display output processing means 3 using light from a light source (not shown). The display device 4 is configured such that a transmissive display element that generates an image, such as a liquid crystal display element, transmits light from a light source (not shown) and outputs display light LD, or a large number of movable microscopic elements. For example, a reflective display element in which mirrors are arranged in a plane reflects light from a light source (not shown) to output display light LD.

  The projection optical system 5 includes a projection lens 5a and a free-form surface mirror 5b. The projection lens 5a is composed of a plurality of lenses formed from glass or resin.

  In this embodiment, the free-form surface mirror 5b is a convex mirror, in which a base material is formed of a resin, and a surface treatment of aluminum is performed on a reflection surface thereof.

  By combining the projection lens 5a and the free-form surface mirror 5b, each light LD, LL of the display device 4 is enlarged and imaged on the first screen 6, and light is projected onto the second screen 7. Can do.

  The first screen 6 is a member that performs display on the meter display of the in-vehicle display device 1, and has a concave cross-sectional shape, and is a reflective type that projects the display light LD from the display device 4 that has passed through the projection optical system 5. It is a screen. The configuration includes a translucent resin base material, a colored layer, a diffusion layer, a lens layer, a reflective layer, and the like. On the first screen 6, the display light LD of the display device 4 forms an image, and the display formed by the user can be visually recognized. Note that LDH in FIG. 1 indicates the upper end of the display light LD displayed by the user's eye point 11, and LDL indicates the lower end of display of the display light LD.

  The second screen 7 is a member that performs display of the head-up display of the in-vehicle display device 1, and as illustrated in FIG. 3, the diffusion layer 7a, the viewing angle control layer 7b, the lens layer 7c, and the design layer 7d Is a transmissive screen that is transmitted and illuminated by the illumination light LL from the projection optical system 5 and irradiates light (transmitted light) LT transmitted to the translucent plate-like member 8. is there. In the present embodiment, the design provided on the second screen 7 is provided with display symbols 17 a and 17 b which are designs composed of characters “caution” on the left and right sides of the second screen 7.

  The diffusion layer 7a has a function of diffusing the incident illumination light LL to emit light uniformly. Examples of the diffusion layer 7a include a light-transmitting sheet containing light-transmitting microbeads, and a surface of the light-transmitting sheet that has minute irregularities. In addition, by providing a colored layer inside the diffusion layer 7a, or on the incident surface side or the emission surface side, the incident into the in-vehicle display device 1 is attenuated even when the external light 12 is irradiated, and the first screen 6 Both the second screens 7 can provide a high contrast display.

  The viewing angle control layer 7b has a function of reducing the incidence of the external light 12 and a function of controlling the emission direction of the transmitted light LT by suppressing the emission of the illumination light LL in an unnecessary direction. The structure is, for example, a light-absorbing (for example, black) resin formed in a louver shape in a translucent resin sheet. The presence of the viewing angle control layer 7b limits the incidence of the light into the in-vehicle display device 1 even when the external light 12 is irradiated, and provides both the first screen 6 and the second screen 7 with a high contrast display. Can do.

  The lens layer 7c functions to change the traveling direction of the projection light so that the obliquely incident illumination light LL is efficiently reflected by the translucent plate-like member 8 in the direction of the eye point 11. It has a sawtooth cross section in which an incident surface and a reflection surface are continuously formed of a light transmitting resin. Since the lens layer 7c is provided, the transmitted light LT is efficiently reflected by the translucent plate-like member 8, so that a high-luminance display can be provided.

  The design layer 7 d is a layer that forms the design of the second screen 7, is formed by the transmission part 7 d 1 and the non-transmission part 7 d 2, and is transmitted and illuminated by the illumination light LL from the projection optical system 5. The design layer 7d is a translucent base material, for example, black printing is performed on the non-transmissive portion 7d2, and white printing is performed on the transmissive portion 7d1, for example, to make the projection light uniform. . The presence of the design layer 7d allows the second screen 7 to use the illumination light LL that is out of focus as the illumination light LL, and the second screen 7 displays a design with a sharp outline. It can be performed.

  The transmitted light LT transmitted through the second screen 7 is reflected by the translucent plate-shaped member 8 and travels toward the user's eye point 11.

  Since the first screen 6 and the second screen 7 are arranged at different angles, display is performed on the first screen 6 constituting the meter display and the second screen 7 constituting the head-up display with a simple structure. Can do.

  The first screen 6 is not limited to a concave shape, but is a three-dimensional surface having a cylindrical surface, a spherical surface, a stepped surface, etc., so that the first screen 6 is a novel that cannot be expressed on a flat panel display such as a liquid crystal panel. Can provide a look.

  The second screen 7 is not limited to a flat plate shape, and a solid surface having a cylindrical surface, a spherical surface, a stepped surface, or the like is displayed on the second screen 7 so that the display reflected by the light transmissive plate member 8 is It becomes a three-dimensional floating display, and can provide a display with an unprecedented appearance.

  The translucent plate-like member 8 reflects the transmitted light LT from the second screen 7 in the direction of the user's eye point 11 and indirectly visually recognizes the second screen 7 as a reflected display. The translucent plate-like member 8 may be a windshield (front glass), or may be a dedicated transparent reflective film called a combiner provided on the windshield.

  Next, a display example of the in-vehicle display device 1 will be described with reference to FIGS.

  The user visually recognizes the display area 15 that forms an image on the first screen 6 on the inner side and the outer side of the steering wheel 14 from the eye point 11. In the display area 15, the display light LD emitted from the display device 4 passes through the projection lens 5 a of the projection optical system 5, is reflected by the free-form curved mirror 5 b, forms an image on the first screen 6, and is visually recognized. Is.

  Further, the display area 16 where the transmitted light LT of the second screen 7 is reflected on the windshield, which is the translucent plate-like member 8, is visually recognized. In the display area 16, the illumination light LL emitted from the display device 4 is transmitted through the projection lens 5 a of the projection optical system 5, reflected by the free-form surface mirror 5 b, and transmitted light LT transmitted through the second screen 7. The light transmitting plate-like member 8 reflects in the direction of the eye point 11 and is visually recognized.

  In FIG. 4, for example, when the vehicle-mounted device (object detection sensor) 2d detects an object in the left direction with reference to the traveling direction of the host vehicle, and determines that the control device of the vehicle-mounted device 2a is in a dangerous state, The head-up display displays a display symbol 17a which is a design composed of “caution” and characters. This indicates that the position of the display symbol 17 a is on the left side of the display area 16.

  In FIG. 5, for example, when the vehicle-mounted device (object detection sensor) 2d detects an object in the right direction with reference to the traveling direction of the host vehicle, and determines that the control device of the vehicle-mounted device 2a is in a dangerous state, The head-up display displays a display symbol 17b, which is a design composed of “caution” and characters. The position of the display symbol 17b indicates that it is on the right side of the display area 16.

  Switching between the display symbol 17a and the display symbol 17b can be realized by the display device 4 selectively performing the irradiation region of the illumination light LL on the second screen 7.

  Furthermore, the display device 4 provides a display corresponding to the difference in the dangerous state by changing the color of the illumination light LL of the display symbols 17a and 17b and the blinking cycle based on the information such as the distance to the object. Can do.

  With the above configuration, an in-vehicle display device capable of displaying on a meter display and displaying on a head-up display with a simple structure can be provided.

  Further, the display of the head-up display by the second screen 7 can be provided with sharpness and high brightness.

  Next, the in-vehicle display device 21 according to the second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the same and equivalent part as 1st Embodiment, and the detailed description is abbreviate | omitted.

  The main difference between the present embodiment and the first embodiment is the positional relationship between the first screen and the second screen. In the first embodiment, the second screen 7 is positioned on the eye point 11 side with respect to the first screen 6. However, in the present embodiment, the first screen 26 is in the eye point with respect to the second screen 27. 11 side. Note that the first screen 26 of the present embodiment is a flat reflective screen.

  In the present embodiment, the projection optical system 5 also differs from the first embodiment in that it includes plane mirrors 25c and 25d in addition to the projection lens 5a and the free-form surface mirror 5b. The plane mirror 25d has a sawtooth shape in which the cross-sectional shape of the reflection surface is formed by combining a plurality of long sides and short sides. By forming in this way, the inclination of the flat mirror 25d to the depth side of the in-vehicle display device 21 can be suppressed, the amount of protrusion of the flat mirror 25d to the depth side can be suppressed, and the in-vehicle display device 21 can be downsized. Can be achieved.

  The display light LD on the first screen 26 of the present embodiment exits the display device 4, passes through the projection lens 5 a of the projection optical system 5, is reflected by the free-form surface mirror 5 b and the plane mirror 25 c, and the first screen 26. The display light LD forms an image on the first screen 26 and is visually recognized.

  The illumination light LL for the second screen 27 exits from the display device 4, passes through the projection lens 5 a of the projection optical system 5, is reflected by the free-form surface mirror 5 b, the plane mirror 25 c, and the plane mirror 25 d, and the second screen 27. The transmitted light LT transmitted through the second screen 27 is reflected by the translucent plate-like member 8 in the direction of the eye point 11 and is visually recognized.

  With the above configuration, an in-vehicle display device capable of displaying on a meter display and displaying on a head-up display with a simple structure can be provided.

  Further, the display of the head-up display by the second screen 7 can be provided with sharpness and high brightness.

  The above description exemplifies the present invention, and it goes without saying that various changes and modifications can be made without departing from the scope of the invention. In each said embodiment, although the 2nd screen was the design board which gave the design, you may employ | adopt the display element which can permeate | transmit illumination, for example, a liquid crystal display element, for example for a 2nd screen. Or the translucent member which does not provide the design etc., for example, a milky white translucent member, may be sufficient. In this semi-transmissive member, the same effect as the warning lamp can be obtained by irradiating the illumination light LL of a different color from the display device 4. Moreover, the effect similar to a warning lamp can be acquired also by the illumination light LL blinking.

  The present invention can be used for an in-vehicle display device mounted on a vehicle such as an automobile.

1 On-vehicle display device 2a On-vehicle equipment (control device)
2b In-vehicle equipment (navigation)
2c On-board equipment (speed sensor)
2d On-vehicle equipment (object detection sensor)
DESCRIPTION OF SYMBOLS 3 Display output processing means 3a Image data correction | amendment part 4 Display device 5 Projection optical system 5a Projection lens 5b Free-form surface mirror 6, 26 1st screen 7, 27 2nd screen 7a Diffusion layer 7b Viewing angle control layer 7c Lens layer 7d Design layer 8 translucent plate-like member 11 eye point 12 outside light 14 steering wheel 15 display area of meter display 16 display area of head-up display 17a display symbol 17b display symbol LD display light LL illumination light LT transmitted light

Claims (11)

An in-vehicle display device having a display device that outputs display light including an image, and a screen on which the display light of the display device is projected, the screen including a first screen and a second screen, The display device outputs the display light for the first screen and the illumination light for the second screen, the display light forms an image on the first screen, and the illumination light transmits and illuminates the second screen. An in-vehicle display device characterized by that. The in-vehicle display device according to claim 1, further comprising a translucent plate-like member that is indirectly viewed as a reflected display of the second screen. The in-vehicle display device according to claim 1, wherein the first screen and the second screen are arranged at different angles. The in-vehicle display device according to claim 1, wherein a lens layer is provided on the second screen. The in-vehicle display device according to claim 1, wherein a viewing angle control layer is provided on the second screen. The in-vehicle display device according to claim 1, wherein a colored layer is provided on the second screen. The in-vehicle display device according to claim 1, wherein a design including a transmissive portion and a non-transmissive portion is provided on the second screen. The in-vehicle display device according to claim 1, wherein the first screen and / or the second screen is non-planar. The in-vehicle display device according to claim 1, wherein an irradiation area of the illumination light to the second screen is selectively performed. The in-vehicle display device according to claim 1, wherein a color of the illumination light to the second screen is changed. The in-vehicle display device according to claim 1, wherein a cycle of blinking the illumination light to the second screen is changed.

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