JPH068749A - Projection type display device for vehicle - Google Patents

Abstract

PURPOSE:To stimulatively appeal an projection image for vehicle information to the vision of a passenger without a problem of a liquid crystal display unit arising by effectively utilizing an intermediate reflection mirror having a plurality of curve reflection surfaces different in a reflection angle from each other. CONSTITUTION:An intermediate reflection mirror 50 by which an emission light flux indicating vehicle information from a projector 40 is reflected on a projection surface 60 comprises upper and lower mirror parts 51 and 52. The mirror parts 51 and 52 are positioned at a given obtuse angle with a vertical direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle projection type display device.

[0002]

2. Description of the Related Art Conventionally, as a projection type display device, for example,
As shown in JP-A-3-27085, in enlarging and projecting an electronic image from a projection unit, an intermediate reflecting mirror is provided above the center of the screen in front of the screen, and the projection unit is There is an intermediate reflection mirror that is provided above the straight line connecting the center of the screen and the center of the intermediate reflection mirror in the screen direction.

[0003]

By the way, in such a structure, when the liquid crystal display adopted in the projection unit is of a fixed pattern type, the intermediate reflecting mirror has a single plane reflecting surface. Since it is configured, the projected image tends to be monotonous. Therefore, even if such a configuration is adopted for a vehicle, the vehicle information specified by the projected image from the intermediate reflecting mirror is monotonous, and therefore, it is necessary to display the information in a way that appeals visually to the driver. It was inappropriate. It may be possible to deal with this by complicating the display pattern of the liquid crystal display, but such a situation is not preferable from the viewpoint of manufacturing and cost of the liquid crystal display.

In view of the above, the present invention effectively utilizes an intermediate reflecting mirror having a plurality of curved reflecting surfaces having different reflecting angles in a vehicular projection display device. The present invention is intended to form a projected image of vehicle information so as to stimulate the occupant's vision visually without the above-mentioned problems of the liquid crystal display.

[0005]

In order to solve the above problems, the present invention provides a rear end opening which is pivotally supported along the front-rear direction of the vehicle on the back side of the instrument panel in the vehicle compartment and opens rearward. A cylindrical body provided with a light source, a transmissive liquid crystal panel, and a magnifying optical system, which are sequentially coaxially arranged from the front to the rear in the cylindrical body, and a light flux from the light source passes through the liquid crystal panel. And a projector that transmits the transmitted light flux through the rear end opening as a light flux representing enlarged image formation by the magnifying optical system, and is supported coaxially behind the projector from the projector. In a projection display device including an intermediate reflecting mirror that receives and reflects a light beam representing the magnified image of, and projects on a projection surface of the instrument panel,
The feature is that it is configured as follows.

That is, the structural feature of the present invention is that the intermediate reflecting mirror is composed of at least two mirror portions arranged in a curved surface shape, and each plane reflecting surface of each mirror portion is magnified and imaged. Is positioned so as to form a predetermined obtuse angle with respect to each other so as to superimpose a part thereof on the remaining part and project it on the projection surface.

[0007]

With the above configuration of the present invention, when the luminous flux representing the vehicle information emitted from the projector is incident on each mirror portion of the intermediate reflecting mirror as an enlarged image, the enlarged image is formed. Is reflected by the plane reflecting surface of each of the mirror portions and projected onto the projection surface. In such cases,
Since the respective mirror portions are arranged in a curved surface shape with each other and the respective plane reflection surfaces thereof are positioned so as to form the predetermined obtuse angle with each other, part of the magnified image is formed on the remaining part. , And is projected on the projection surface. Therefore, the projected image on the projection surface is visually recognized by the driver as a combined image in which a part of the vehicle information information is superimposed on the remaining vehicle information part. As a result, the projected image of vehicle information is improved in appearance as a multi-color projected image that is superimposed to appeal to the driver's vision without complicating the display pattern of the liquid crystal panel and increasing the cost. obtain.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a projection type display device for a vehicle according to the present invention. It is attached near the back surface side of an instrument panel 11 provided on a dash panel 10 that constitutes a lower part of the wall. In FIG. 1, reference numeral 20 indicates a steering wheel.

This display device has a bent plate-shaped mounting plate 30 made of a non-translucent material.
By the metal fittings 31 and 31 fixed to the middle portion of the back surface,
The vehicle body frame 12 located on the back surface side of the instrument panel 11 is sandwiched from above and supported near the back surface of the instrument panel 11. The mounting plate 30
The upper surface of the has been matted.

Further, the display device is provided with a projector 40, and this projector 40 has a cylindrical tubular body 4.
In FIG. 1, the fixing plate 1 is fixed to the front side portion of the upper surface of the mounting plate 30 along the front-rear direction of the vehicle. On the inner bottom side of the cylindrical body 41,
A light source 42 such as a halogen lamp is coaxially arranged, and the light source 42 emits a light beam toward the rear end opening 41a of the cylindrical body 41. Further, a reflector 43 is coaxially arranged immediately before the light source 42 on the inner bottom side of the cylindrical body 41, and plays a role of increasing the area average brightness of the light source 42.
Thereby, the light flux from the light source 42 is efficiently emitted toward the rear end opening 41a.

The condenser lens system 44, the transmissive liquid crystal panel 45 and the magnifying lens system 46 are sequentially arranged coaxially from the central portion of the cylindrical body 41 to the rear end opening 41a side. The light flux from the light source 42 and the reflector 43 is converted into a parallel light flux, and the liquid crystal panel 45 is converted.
Incident on. The liquid crystal panel 45 constitutes a liquid crystal display together with a drive circuit (not shown), and is driven by the drive circuit to operate, and transmits the parallel light flux from the condenser lens 44 as a parallel light flux representing desired vehicle information to enlarge the magnifying lens. It is incident on the system 46.

However, on the incident surface of the liquid crystal panel 45, color filters of a plurality of colors necessary for coloring a projected image described later are attached. In addition, a meter display pattern portion for specifying the meter display information M (see FIG. 2A) is formed in the upper half portion of the liquid crystal panel 45, while the tachometer is provided in the lower half portion of the liquid crystal panel 45. Zone display information Z
Tachometer zone display pattern section (Fig. 2
(See (A)) is formed. Accordingly, the vehicle information specified by the parallel luminous flux includes the amber color meter display information M formed in association with the color filter by the meter display pattern section and the color filter by the tachometer zone display pattern section. And the green-colored tachometer zone display information Z formed in association with.

The magnifying lens system 46 forms the parallel light flux from the liquid crystal panel 45 as a magnified image on the curved reflecting surface of the curved intermediate reflecting mirror 50 fixed onto the rear bending wall 32 of the mounting plate 30. . In such a case, the rear end bent wall 3 of the mounting plate 30
The angle between the lower side wall 32a and the upper side wall 32b of 2 is
The projection image representing the vehicle information from the projector 40, which is projected on the projection screen 60 described later, is configured such that the rotation speed information portion is superimposed on the vehicle speed information portion as shown in FIG. 2B. Is set to an obtuse angle. The intermediate reflecting mirror 50 is composed of a lower mirror portion 51 fixed on the lower side wall portion 32a of the mounting plate 30 and an upper mirror portion 52 fixed on the upper side wall portion 32b of the mounting plate 30. The mirror portions 51 and 52 are configured by forming a reflecting surface by performing flat aluminum vapor deposition on flat glass. Then, the intermediate reflecting mirror 50 has each mirror portion 5
The respective incident light fluxes on the first and the second light sources 52 are reflected and made incident on the projection screen 60 through the opening 11a of the instrument panel 11 shown in FIG. The mirror portion 51 is masked so as not to reflect the portion other than the necessary portion of the tachometer zone display information Z.

The projection screen 60 is fitted in the opening 11b shown in FIG. 1 of the instrument panel 11, and the projection screen 60 is formed by subjecting the surface of a synthetic resin plate to white treatment. ing. Then, the projection screen 60 displays the vehicle information by the reflected light flux from the intermediate reflecting mirror 50 on its surface as an enlarged projection image.

In the present embodiment thus constructed, when a light beam is generated from the light source 42, the light beam from the light source 42 is
Together with the reflected light flux from the reflector 43, it is converted into a parallel light flux by the condenser lens system 44 and enters the liquid crystal panel 45. At this time, if the liquid crystal panel 45 is driven by the drive circuit, the liquid crystal panel 45 causes the parallel light flux from the condenser lens 44 to enter the magnifying lens system 46 as a parallel light flux representing vehicle information. Then,
The magnifying lens system 46 forms the parallel light flux from the liquid crystal panel 45 as a magnified image on the reflecting surface of the intermediate reflecting mirror 50.
In such a case, the light flux representing the tachometer zone display information Z of the vehicle information is imaged on the reflecting surface of the lower mirror portion 51 of the intermediate reflecting mirror 50. On the other hand, the upper mirror portion 52 of the intermediate reflecting mirror 50
A light flux representing the meter display information M of the vehicle information is imaged on the reflecting surface of the vehicle.

Next, each mirror portion 51, 5 of the intermediate reflecting mirror 50.
2 reflects the light fluxes representing the respective magnified images and makes them incident on the surface of the projection screen 60 through the openings 11a. This means that the magnified image on each mirror portion 51, 52 of the intermediate reflecting mirror 50 is projected on the surface of the display panel 60. In this case, the angle formed by the reflecting surface of the lower mirror portion 51 and the reflecting surface of the upper mirror portion 52 is determined by a predetermined obtuse angle formed by the lower side wall portion 32a and the upper side wall portion 32b of the rear end bent wall 32 of the mounting plate 30. Is consistent with.

Therefore, as shown in FIG. 2B, the projection image on the projection screen 60 is displayed below the projection image portion (corresponding to the meter display information M) by the reflected light flux from the upper mirror 52. The projected image portion (corresponding to the tachometer zone display information Z) formed by the reflected light flux from the side mirror portion 52 is an image that is superimposed. As a result, the projected image on the surface of the projection screen 60 is visually recognized by the driver as a combined image in which the green tachometer zone display information Z is superimposed on the lower part of the amber meter display information M. As a result, the projected images of vehicle information are superimposed so as to stimulate the driver's vision visually without complicating the display pattern of the liquid crystal display and increasing the cost as described above. You can improve the appearance as.

Next, a modification of the above embodiment will be described. In this modification, as shown in FIG. 3, the mounting plate 30A, the transmissive liquid crystal panel 45A and the intermediate reflecting mirror 5 are provided.
0A is used instead of the mounting plate 30, the liquid crystal panel 45, and the intermediate reflecting mirror 50 described in the above embodiment, which is a characteristic feature of the configuration. In the upper part of the liquid crystal panel 45A, a plurality of indicator display information N (FIG. 4A) of the vehicle is displayed.
A plurality of indicator display pattern portions for specifying the meter display pattern portion for specifying the meter display information M (see FIG. 4A) are formed in the center of the liquid crystal panel 45A. A tachometer zone display pattern portion (see FIG. 4A) that specifies the tachometer zone display information Z is formed in the lower portion of the panel 45A. Accordingly, the vehicle information specified by the parallel light flux from the liquid crystal panel 45A includes the indicator display information N formed in association with the color filter by the indicator display pattern portion and the color filter by the meter display pattern portion. And amber color meter display information M formed in association with the color filter and green color tachometer zone display information Z formed in association with the color filter by the tachometer zone display pattern portion.

The magnifying lens system 46 in the above embodiment is
The parallel light flux from the liquid crystal panel 45A is formed as an enlarged image on the curved reflecting surface of the curved intermediate reflecting mirror 50A fixed on the rear end curved wall 33 of the mounting plate 30A. In such cases,
The rear end bending wall 33 of the mounting plate 30A is an alternative to the rear end bending wall 32 of the mounting plate 30 in the above-described embodiment, and in the rear end bending wall 33, the lower side wall portion 33a and the central wall portion 3 thereof.
The angle formed by 3b and the angle formed by the central wall portion 33b and the upper side wall portion 33c are such that the projected image representing the vehicle information projected on the projection screen 60 is the meter display information portion as shown in FIG. 4 (B). A predetermined obtuse angle is set so that a part Na of the indicator display information N and a part of the tachometer zone display information Z are superposed on the upper part. In addition, as can be understood from FIGS. 4 (A) and 4 (B), the upper side wall portion 33b has a portion Na of the indicator display information N.
Is also bent in the left-right direction so as to cross and overlap with each other. The intermediate reflecting mirror 50A is attached to the mounting plate 30A.
A lower mirror portion 53 fixed on the lower side wall portion 33a, a central mirror portion 54 fixed on the central wall portion 33b of the mounting plate 30A,
The mirror-shaped upper mirror portion 55 fixed to the upper side wall portion 33c is formed. Each of these mirror portions 53 and 54 forms a reflecting surface by performing flat aluminum vapor deposition on flat glass. Is configured. Also, the mirror 55
The central mirror portion 55a, the left and right mirror portions 55b, 55c of FIG.
Then, only the mirror portion 55c is shown) is similarly configured. Then, the intermediate reflecting mirror 50A has the respective mirror portions 53,
Each of the incident light fluxes to and is reflected by the projection screen 60 through the opening 11a of the instrument panel 11.
Make it incident on top. It should be noted that the mirror portions 53 and 55 are masked so as not to reflect the portions other than the necessary portions of the tachometer zone display information Z and the indicator display information N. The other structure is the same as that of the above embodiment.

In this modified example having such a configuration,
Substantially similar to the above-described embodiment, when the magnifying lens system 46 forms a parallel light flux from the liquid crystal panel 45A as a magnified image on the reflecting surface of the intermediate reflecting mirror 50A, the lower mirror portion 53 of the intermediate reflecting mirror 50A is formed. A light flux representing the tachometer zone display information Z of the vehicle information is imaged on the reflecting surface, and the intermediate reflecting mirror 50A
A light beam representing the meter display information M of the vehicle information is imaged on the reflecting surface of the central mirror section 54 of the intermediate mirror section 50A.
On the right side mirror portion 55c of the upper mirror portion 55, a light flux representing a part Na of the indicator display information N of the vehicle information is imaged.

Next, each mirror portion 53 of the intermediate reflecting mirror 50A,
54 reflects the light fluxes representing the respective magnified images and makes them incident on the surface of the projection screen 60 through the openings 11a, and the right mirror portion 55c of the intermediate reflecting mirror 50A,
The light flux representing the magnified image is crossed right and left, reflected, and made incident on the surface of the projection screen 60 through the opening 11a. This means that the mirror portions 53 and 54 of the intermediate reflecting mirror 50A are
This means that the upper magnified image is projected on the surface of the display panel 60, and the magnified image on the mirror portion 55c of the intermediate reflecting mirror 50A crosses left and right and is projected on the surface of the display panel 60.

In such a case, the lower mirror portion 53 and the central mirror portion 54
The angle formed between the adjacent reflecting surfaces of the upper mirror portion 55 and the upper reflecting surface of the upper mirror portion 55 corresponds to each predetermined obtuse angle on the rear end bent wall 33 of the mounting plate 30A. Therefore, the projected image on the projection screen 60 is as shown in FIG.
As shown in (B), substantially the same as the above embodiment,
A projected image portion (corresponding to the tachometer zone display information Z) formed by the reflected light flux from the lower mirror portion 53 is superimposed on the lower portion of the projected image portion (corresponding to the meter display information M) formed by the reflected light flux from the central mirror portion 54. It will be a statue. Further, the projected image portion (corresponding to a portion Na of the indicator display information N) by the reflected light flux from the mirror portion 55c of the upper mirror portion 55 is moved to the left to form an overlapping image. As a result, the effects described in the above-described embodiments can be achieved while further improving the appearance as a multi-color projection image superimposed so as to stimulate the driver's vision.

In carrying out the present invention, the vehicle information to be superimposed is not limited to the examples described in the above-mentioned embodiments and modifications, and may be changed as appropriate.

Further, in the above-mentioned embodiment, an example in which the intermediate reflecting mirror 50 is composed of the mirror portions 51 and 52 which are formed in a vertically bent shape has been described. However, instead of this, the intermediate reflecting mirror 50 is arranged in the left and right directions. You may implement by comprising each mirror part formed in the bending shape. In such a case, of the vehicle information, for example, the right side portion of the meter display information M in FIG. 2 may be projected so as to be positioned on the right side of the left side portion.

In the above embodiment, the reflected light flux from the intermediate reflecting mirror 50 is made incident on the projection screen 60 through the opening 11a, but instead of this,
By fitting a transparent wall that is perpendicular to the reflected light flux into the opening 11a, the reflected light flux can be transmitted through the transparent wall while preventing the intrusion of dust and the like.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing an embodiment of a display device according to the present invention applied to an instrument panel inside a vehicle compartment.

FIG. 2 is an exemplary view of each projected image before and after superimposition of a projected image by the display device.

FIG. 3 is a schematic sectional view of an essential part showing a modification of the embodiment.

FIG. 4 is an exemplary view of each projected image before and after superimposition of projected images in the same modified example.

[Explanation of symbols]

11 ... Instrument panel, 40 ... Projector,
41 ... Cylindrical body, 41a ... Rear end opening, 42 ... Light source, 45,
45A ... Liquid crystal panel, 46 ... Magnifying lens system, 50, 50
A ... Intermediate reflecting mirrors 51-55 ... Mirror portion, 55c ... Right side mirror portion, 60 ... Projection screen.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoshifumi Yoshida, 1-1, Showa-cho, Kariya city, Aichi Prefecture, Nihon Denso Co., Ltd. (72) Inventor, Yasuhisa Yamashita, 1-1, Showa-cho, Kariya city, Aichi prefecture Within the corporation

Claims (1)

[Claims] 1. A tubular body having a rear end opening which is supported by a rear side of an instrument panel in a vehicle compartment along the front-rear direction of the vehicle and opens rearward, and in the tubular body is directed from front to rear. A light source, a transmissive liquid crystal panel, and a magnifying optical system that are sequentially arranged coaxially are provided, and a light flux from the light source is transmitted through the liquid crystal panel as a light flux representing vehicle information. A projector that emits light through the rear end opening as a light beam representing enlarged image formation by a system, and a projector that is coaxially supported behind the projector and receives the light beam representing the enlarged image formation from the projector and reflects the light beam. In a projection type display device having an intermediate reflecting mirror for projecting on the projection surface of the ment panel, the intermediate reflecting mirror is composed of at least two mirror portions arranged in a curved surface shape, Each flat reflective surface of these respective mirror unit,
A projection display device for a vehicle, characterized in that a part of the magnified image is superimposed on the remaining part and projected on the projection surface so as to form a predetermined obtuse angle with each other.