JP2018177224A - Head-up display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head-up display device having excellent mountability on a vehicle.SOLUTION: A head-up display device H of the embodiment is mounted on an instrument panel PNL of a vehicle, it accommodates display means 1 for emitting display light L to a housing 4 having a translucent cover 42 having a curved surface, and it emits the display light L emitted by the display means 1 from the translucent cover 42. The curved surface of the translucent cover 42 curves in such a manner that a side 42CF42OF of a vehicle front F side becomes lower than a side 42CB42OB of a vehicle rear B side, and it inclines in a left and right CO direction of the vehicle, and one corner part 42OF of the curved surface becomes the lowest.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a head-up display device excellent in mountability to a vehicle.

  A head-up display device mounted on an instrument panel of a conventional vehicle, as disclosed in, for example, Patent Document 1, covers a window portion of a casing from which display light is emitted with a translucent cover and dusts in the casing To prevent contamination. In addition, the translucent cover that covers the window has a tilt angle that reflects incident sunlight to the wall of the instrument panel of the vehicle so that people inside and outside the vehicle are not dazzled by the reflection of sunlight. Curvature in the direction.

Unexamined-Japanese-Patent No. 2004-17708

  However, the instrument panel of a vehicle is often designed to be lower outside the center of the vehicle, and a translucent cover is used to reflect light from the wall of the instrument panel of the vehicle. When curving in the direction, if the curved shape is determined based on the lowest position of the wall of the instrument panel of the vehicle, it may be necessary to accommodate the head-up display device in the instrument panel at a deep position. There is room for improvement in the ease of installation.

  This invention is made in view of the subject mentioned above, and an object of this invention is to provide the head-up display apparatus which is excellent in the mounting property to a vehicle.

The head-up display device according to the present invention is
Mounted on the instrument panel PNL of the vehicle,
A display unit 1 for emitting display light L is accommodated in a housing 4 having a translucent cover 42 having a curved surface, and the display light L emitted from the display unit 1 is emitted from the translucent cover 42 It is up display device H,
The curved surface of the translucent cover 42 is a first corner 42OF located on the front outside of the vehicle, a second corner 42CF located on the front inside of the vehicle, and a third on the rear inside of the vehicle A corner 42CB, and a fourth corner 42OB located on the rear outside of the vehicle;
The first corner 42OF is at the lowest position among the first to fourth corners, and the third corner 42CB is at the highest position among the first to fourth corners.

Also preferably, in the head-up display according to the present invention
The respective optical path distances reflected from the curved surface of the translucent cover 42 to the instrument panel PNL are equal in the inward and outward direction of the vehicle.

Also preferably, the head-up display device according to the present invention is
A drainage means 44 is provided around the lowest corner 42OF of the curved surface.

Also preferably, of the head-up display device according to the present invention
The curved surface of the translucent cover 42 is a curved surface that reflects external light reflected by the curved surface toward a wall of the instrument panel PNL.

  ADVANTAGE OF THE INVENTION According to this invention, the head-up display apparatus which is excellent in the mounting property to a vehicle can be provided.

It is a schematic diagram showing a head up display device concerning an embodiment of the present invention. (A) is the schematic in the case where it sees from the side of a vehicle, (b) is the schematic in the case where it sees from a passenger's viewpoint. It is a structure schematic of the embodiment. It is a perspective view of the embodiment. (A) is a whole head-up display apparatus perspective view, (b) is a perspective view of a translucent cover. It is a principal part expansion perspective view of the embodiment. (A) shows the Example which provides a drainage port as a drainage means, (b) shows the Example which provides a drainage groove as a drainage means. It is the schematic which shows the comparison of the mounting structure to the instrument panel of the vehicle of the embodiment and the conventional structure. (A) is a schematic view when viewed from the side of the vehicle, (b) is a schematic view of the conventional configuration when viewed from the rear of the vehicle, and (c) is a view when viewed from the rear of the vehicle It is the schematic in this embodiment.

  Hereinafter, based on an accompanying drawing, the embodiment which applied the present invention to the head up display device carried in vehicles is described. In each drawing, the front of the vehicle is described as F, the rear of the vehicle as B, the inside of the vehicle as C, and the outside of the vehicle as O.

  The head-up display device H of the present embodiment includes a display (display means) 1 that emits display light L, a control substrate 2 that controls the display 1, a reflecting mirror 3, and a housing 4 that houses them. Mainly composed by The head-up display device H reflects the display light L emitted from the display 1 in response to the control of the control board 2 to the reflecting mirror 3, and then transmits the light from the translucent cover (exit) 43 of the housing 4 to the vehicle. By projecting on the windshield (projected member) FNT, a virtual image V is formed in front of the windshield FNT. The head-up display device H emits vehicle information such as the traveling speed of the vehicle from the display 1 as the display light L under the control of the control board 2 so that the landscape outside the vehicle and the vehicle information displayed by the virtual image V are superimposed. Make the passenger D visually recognize.

  The display 1 includes, for example, a backlight light source including a light emitting element emitting light such as an LED, and a polarizing plate on both sides of a liquid crystal cell in which a liquid crystal layer is sealed in a pair of light transmitting substrates on which a transparent electrode film is formed. And a bonded display panel. The display 1 illuminates the image displayed on the display panel with a backlight source, and emits display light L from the front of the display panel. The display 1 may be configured of an organic EL display or the like.

  The control board 2 is, for example, a rigid circuit board on which a storage device, an arithmetic device, and an input / output interface are mounted. The control board 2 is connected to, for example, an in-vehicle communication network including a CAN (Controller Area Network), and receives various information (for example, traveling speed of the vehicle, engine rotation number, remaining fuel amount, etc.) of the vehicle input from the in-vehicle communication network. It is configured as an image, and causes the display 1 to output the image as display light L.

  The reflecting mirror 3 comprises a plane mirror 30 and a concave mirror 31. The plane mirror 30 is provided to adjust the optical path distance from the display 1 to the windshield FNT, and causes the virtual image V to be imaged more forward of the vehicle by increasing the optical path distance. The concave mirror 31 is a reflecting mirror having a curved surface that corrects distortion due to the curved shape of the windshield FNT, and enlarges the display light L to project it onto the windshield FNT.

  The housing 4 is mainly configured by a lower case 40, an upper case 41, a translucent cover 42, and a light shielding wall 43.

  The lower case 40 is, for example, a case body obtained by die-casting aluminum, and the display 1, the control board 2, and the reflecting mirror 3 are fixed.

  The upper case 41 is made of, for example, a resin case body such as polyethylene terephthalate (PET) or polycarbonate (PC). The upper case 41 and the lower case 40 are fitted, and the display 1, the control board 2, and the reflecting mirror 3 are accommodated by both cases.

  The upper case 41 is formed with a window for emitting the display light L, and a substantially quadrilateral translucent cover 42 made of a translucent resin such as an acrylic resin is disposed in the window. Inside the upper case 41, a light shielding wall 43 hanging downward from the upper part is provided, and external light such as sunlight SL incident from the window enters the display 1 and the virtual image V is difficult to see (( To prevent washout).

For each corner of the translucent cover 42, when the front inward of the vehicle is 42CF, the outward front of the vehicle is 42OF, the rearward inner side of the vehicle is 42CB, and the rearward outer side of the vehicle is 42OB, the translucent cover 42 has a side 42CB42OB The rear side B) has a concave curved surface which is higher than the side 42CF 42OF (the front side F of the vehicle). Due to this curved surface, light in which external light such as sunlight SL is reflected on the surface of the translucent cover 42 is reflected to the wall of the instrument panel PNL, and the reflected light of the translucent cover 42 causes people inside and outside the vehicle Do not dazzle.
In addition, the curved surface of the translucent cover 42 conforms to the shape of the instrument panel PNL so that the side 42CF42CB (the inner side C of the vehicle) is higher than the side 42OF42OB (the outer side O of the vehicle) And the corner 42OF is the lowest. The curved surface of the translucent cover 42 is preferably designed such that the optical path distances reflected from the curved surface of the translucent cover 42 to the instrument panel PNL are equal in the lateral and lateral directions of the vehicle.

A drainage means 44 is formed around the corner 42OF of the translucent cover 42 of the upper case 41. The drainage means 44 is for draining the liquid to the outside so that the liquid is not accumulated on the translucent cover 42. For example, as shown in FIG. 4A, the drainage connected to the outside of the vehicle or inside the instrument panel PNL It consists of the mouth 44a.
Further, in the upper case 41, a standing wall 45 extending to the instrument panel PNL is formed so as to surround the translucent cover 42. The upright wall 45 contacts the instrument panel PNL when the head-up display device H is disposed on the instrument panel PNL of the vehicle, and the inside of the instrument panel PNL is not visually recognized from the outside. Further, even if a liquid such as water is released to the translucent cover 42 by the standing wall 45, the liquid appropriately flows to the lowest corner 42OF of the translucent cover 42 and is disposed around the corner 42OF. It is drained out of the vehicle through the drain means 44.
In addition, as shown in FIG. 4B, the drainage means 44 cuts out the periphery of the corner 42OF of the standing wall 45 extending to the instrument panel PNL so as to surround the periphery of the translucent cover 42 as a drainage groove 44b. The liquid may be drained to the outside so that the liquid is not accumulated on the translucent cover 42.

  The embodiments of the present invention have been described above. By configuring in this manner, external light such as sunlight SL reflected by the translucent cover 42 according to the shape of the instrument panel PNL has an appropriate curved shape so as not to dazzle a person inside or outside the vehicle. As shown in FIG. 5C, the head-up display device according to the present invention has a head-up display as compared with the conventional head-up display device horizontal to the left and right inside and outside (horizontal direction) of the vehicle as shown in (b). Since it is not necessary to store the device at a deep position in the instrument panel PNL, the mountability to a vehicle is excellent.

  Further, by providing the drainage means 44 around the lowest corner 42OF of the translucent cover 42, even when a liquid such as water is released on the translucent cover 42, the liquid is discharged to the drainage means 44. Drainage is enhanced because it gathers and flows properly. Note that the rising wall 45 surrounding the periphery of the light transmitting cover 42 reduces the possibility of the liquid flowing out from a place other than the drainage means 44.

  Note that various improvements and design changes can be made without departing from the scope of the present invention. For example, the projection target is not limited to the windshield FNT of a vehicle, and may be a combiner or the like.

  The present invention is suitable as a head-up display device mounted on a vehicle.

1: Display (display means)
2: Control board (control means)
3: Reflecting mirror 4: Casing 40: Lower case 41: Upper case 42: Translucent cover 43: Shading wall 44: Drainage means 44a: Drain 44b: Drain 45: Standing wall D: Passenger FNT: Front glass ( Projected member)
L: Display light PNL: Instrument panel V: Virtual image

Claims (4)

Mounted on the instrument panel of the vehicle,
A head-up display device that accommodates display means for emitting display light in a housing having a light-transmissive cover having a curved surface, and emits the display light emitted from the display means from the light-transmissive cover.
The curved surface of the translucent cover has a first corner located on the front outer side of the vehicle, a second corner located on the front inner side of the vehicle, and a third corner located on the rear inner side of the vehicle, A fourth corner located on the rear outside of the vehicle;
The first corner is at the lowest position among the first to fourth corners, and the third corner is at the highest position among the first to fourth corners. Head-up display device. The respective optical path distances reflected from the curved surface of the translucent cover to the instrument panel are equal in the inward and outward direction of the vehicle
The head-up display device according to claim 1, The head-up display device according to claim 1 or 2, further comprising drainage means around one of the lowest corners of the curved surface. The curved surface according to any one of claims 1 to 3 , wherein the curved surface of the light-transmissive cover is configured to reflect external light reflected by the curved surface toward a wall of the instrument panel. The head-up display apparatus as described in a term.

Images