TWI631027B - Head-up display device for long-distance imaging - Google Patents

Abstract

The invention relates to a head-up display device for long-distance imaging, comprising an image projection module, a reflective diffusion sheet and a concave mirror module, wherein the reflective diffusion sheet is matched with the concave mirror module to increase the reflection distance. In order to obtain a far distance of the optical path, the virtual image of the far projection distance can be obtained under the same concave mirror magnification, thereby reducing the driver's visual fainting, so as to obtain an optimal visual effect, thereby improving driving safety.

Description

Head-up display device for long-distance imaging

The invention relates to a head-up display device for long-distance imaging, in particular to a head-up display device which can reduce the driver's visual fainting feeling, which uses a reflective diffusion sheet and a concave mirror module to increase the reflection distance, so as to obtain The far distance of the optical path allows the virtual image of the far projection distance to be obtained under the same concave mirror magnification, thereby reducing the driver's visual fainting and obtaining an optimal visual effect, thereby improving driving safety.

The head-up display technology used in automobiles today is not complicated by the head-up display on the aircraft; it is an optical system, generally consisting of a main device of a projector and a stack of mirrors, the projector is composed of a signal light source, The projection mirror is composed of other optical components. The signal source of the projector is composed of an LCD liquid crystal display or a CRT cathode ray tube, and emits light from the signal source, and then projects the image onto the glass through the projector. The mirror (or a special transparent screen), and then the text or image is displayed by the mirror.

As shown in the first figure, the head-up display of the reference US7936518 represents a drawing comprising an infrared emitting unit 5A for emitting an infrared ray to a user DA; a mirror element 3A for reflecting from a concave mirror 4A A display 2A emits one of the visible light LA, and transmits the infrared light reflected by the user DA and the concave mirror 4A; a plurality of imaging units 6A, 7A face the concave mirror 4A to sense infrared rays, and each image All from different directions; and an image processing unit 8A that projects the visible light LA into one On the windshield WA, further virtual imaging VA is reflected to the eyes of the user DA.

Multiplying the object path distance in front of the concave mirror by the concave mirror magnification is the distance of the virtual image imaging. However, the virtual image imaging distance is required to be: (1) the magnification of the concave mirror is improved, but the ideal lens cannot be achieved due to the process limitation of the concave mirror. The virtual image received by both eyes is exactly the same, so the higher the magnification, the larger the error of imaging, so that the error caused by the two eyes receiving the image will cause the viewer to feel dizzy, for the comfort of viewing. , so the magnification is usually controlled within seven times; (2) is to lengthen the object distance light path, but since the head-up display is usually set inside the instrument panel in front of the driving, its space is limited, although in order to lengthen the object distance light path, the optical machine and the concave mirror The mirror is additionally designed so that the light path can reflect the length of the object back and forth. However, due to the limitation of the length, the virtual image distance of the head-up display can only be 2.5 meters away from the driving eye.

According to the function of car navigation, it is mainly to guide the driver to switch to the correct lane or to warn the front distance. In order to play the navigation function, the driver often shifts his attention from the road to the head-up display. This is obviously not a good one. It is better to directly put the navigation guide symbol directly on the road or on the front tail of the warning, so that the driver does not need to shift his attention. It can be said that it is ideal for the driver to put information. The key to the problem lies in how to extend the display distance of the head-up display and attach it directly to the road on the road or to the front tail of the road to be warned, but it is an important subject to be broken.

In order to solve the above-mentioned technical bottlenecks, the industry has continuously proposed various technical solutions, and the related technologies can be considered as TW I443377, TW I506299, TW 201624101, CN 201610134321, TW 201410829066, CN201510649759, CN201520418145, TW I446001 and the like.

Although the above patents have disclosed the application technology of the related head-up display, there are some defects in the use:

1. In the above-mentioned patents, some of them use a single projection device to cast a straight cut picture, but the disadvantage is that the standard distance image cast is too short, and the driver is likely to have a visual dizziness when viewing. Affect the safety of driving.

2. Although some patents can be used to project standard distance images and long-distance images through two or more projection devices, or with more cut images, the positions of multiple projection devices are mostly Positioned in the same position, and the images provided are mostly horizontally cut on the same horizontal plane, and there is less straight cut image, so it is not easy to accurately align the navigation guide symbols on the road or stick to it. The warning on the front end of the car makes the navigation guide effect greatly reduced.

In view of the above-mentioned lack of the above formula, the inventor of the present invention has finally completed the head-up display device of the long-distance imaging of the present invention after numerous studies and improvements, that is, the object of the present invention is to provide a visually faint sense for the driver. The display device is raised, so that the reflective diffuser of the present invention can be used in a limited space to increase the reflection distance to obtain a far distance of the optical path, so that the same concave mirror magnification can be obtained. The virtual image of the projection distance is used to reduce the driver's visual fainting, thereby obtaining an optimal visual effect, thereby improving driving safety.

In order to achieve the above object of the present invention, the head-up display device for remote imaging of the present invention comprises: An image projection module disposed on an instrument panel below a windshield of a vehicle; a reflective diffuser disposed at a boundary between the ceiling of the vehicle and the windshield, the output light source of the image projection module is directed to the reflective diffuser, and imaged on the reflective diffuser to diffuse the reflective diffusion The film becomes a screen for displaying images: a concave mirror module, an instrument panel disposed under the windshield of the vehicle, the concave mirror module magnifying the image of the reflective diffuser; and the reflective diffusion is diffused by the above structure The distance between the sheet and the concave mirror module can obtain a far distance of the optical path without wasting space, so that the virtual image with a far projection distance is characterized by the same concave mirror magnification.

The image projection module described above is a digital light processing device (DLP).

The concave mirror module is disposed under the instrument panel, and the concave mirror module is covered by a transparent dust cover.

The concave mirror module is disposed above the instrument panel, and the concave mirror module is disposed in a casing.

The concave mirror module includes a concave mirror and a motor gear set, and the reflection angle of the concave mirror is adjusted by the rotation of the motor gear set.

The concave mirror module described above is composed of the concave mirror and a plurality of reflective lenses.

The reflection to the diffusion sheet further includes a rotation axis, and the rotation of the rotation shaft is transmitted to adjust a position projected on the image below the windshield.

The concave mirror module enlarges and projects the image of the reflective diffusion sheet to the driver's eyes

The concave mirror module enlarges the image of the reflective diffuser and projects it to The windshield is reflected by the windshield to the driver's eyes.

The head-up display device for remote imaging of the present invention further comprises a reflective film disposed on the windshield.

The head-up display device for remote imaging of the present invention can use a reflective diffuser with a concave mirror module to increase the reflection distance in a limited space, so as to obtain a far distance of the optical path, so that under the same concave mirror magnification, A virtual image that can obtain a far projection distance is a feature.

The head-up display device for remote imaging of the present invention is characterized by the principle of virtual image imaging, and the concave mirror is imaged through the concave mirror module to obtain a far distance of the optical path, so that the same concave mirror magnification is obtained. A virtual image to a far projection distance, thereby providing the best visual effect, to reduce the driver's visual fainting, thereby improving his driving safety.

[study]

2A‧‧‧ display

3A‧‧‧Mirror components

4A‧‧‧ concave mirror

5A‧‧‧Infrared emitting unit

6A, 7A‧‧‧ imaging unit

8A‧‧‧Image Processing Unit

DA‧‧‧ users

LA‧‧‧ visible light

VA‧‧ virtual imaging

WA‧‧‧windshield

〔this invention〕

1‧‧‧Image projection module

2‧‧‧Reflective diffuser

21‧‧‧Rotary axis

3‧‧‧ concave mirror module

31‧‧‧ concave mirror

32‧‧‧Motor gear set

33‧‧‧Reflective lenses

34‧‧‧Shell

4‧‧‧Reflective film

A‧‧‧ dashboard

A1‧‧‧ transparent dust cover

C‧‧‧ ceiling

D‧‧‧virtual image

E‧‧‧ eyes

L‧‧‧Light Road

W‧‧‧windshield

The first figure is a schematic diagram of a conventional head-up display device.

The second figure is a schematic view of a first embodiment of the present invention.

The third figure is a schematic view of another embodiment of the first embodiment of the present invention.

The fourth figure is a schematic view of an embodiment in which a reflective film is applied to a windshield according to a first embodiment of the present invention.

Fig. 5 is a schematic view showing another embodiment of the concave mirror module of the first embodiment of the present invention.

Figure 6 is a schematic view of a second embodiment of the present invention.

Fig. 7 is a view showing an embodiment of a second embodiment of the present invention in which a reflective film is applied to a windshield.

Figure 8 is a schematic view showing another embodiment of the concave mirror module of the second embodiment of the present invention.

Fig. 9 is a view showing another embodiment of the windshield reflective film of the present invention.

Referring to the second figure, the first embodiment of the head-up display device for remote imaging of the present invention comprises: an image projection module 1 disposed on the instrument panel A below the windshield W of a vehicle. The image projection module 1 is a digital light processing device (DLP), which utilizes a developing technology used in a projector and a rear projection television. a reflective diffuser 2 is disposed at a boundary between the ceiling C of the vehicle and the windshield W, and an optical path L of the output light source of the image projection module 1 is directed to the reflective diffuser 2, and The reflective diffuser 2 is formed on the reflective diffuser 2 to form a screen for displaying images. The reflective diffuser 2 further includes a rotating shaft 21, and the rotation of the rotating shaft 21 can be adjusted and projected on the windshield W. a concave mirror module 3 is disposed above the instrument panel A. The concave mirror module 3 includes a concave mirror 31 and a motor gear set 32. The rotation of the motor gear 32 can adjust the reflection of the concave mirror 31. angle The concave mirror module 3 enlarges the image of the reflective diffuser 2 and projects the reflection to the driver's eye E. With the above configuration, the distance between the reflective diffuser 2 and the concave mirror module 3 is In the case of not wasting space, obtain a far distance of the optical path, and the principle of virtual image imaging Is the imaging through the concave mirror 31, the concave mirror imaging formula: 1 / p + 1 / q = 1 / f; f: focal length, q: object distance, p: image distance, and thus under the same concave mirror 31 magnification, obtain The virtual image D of the far projection distance is its characteristic.

The concave mirror module 3 is disposed at a higher position on the instrument panel A, so that the optical path L reflected by the concave mirror 31 can directly reflect the image from the concave mirror 31 without being reflected by the windshield W. The eye E of the driver; in addition, the reflected light path L of the present invention may also be as shown in the third figure, that is, the concave mirror module 3 is disposed at a lower position on the instrument panel A, and the concave mirror module 3 is projected. The light path L is reflected by the windshield W to the driver's eye E.

As shown in the fourth figure, the head-up display device for remote imaging of the present invention further includes a reflective film 4 disposed on the windshield W to improve the reflectivity of the virtual image D. 4 may be disposed inside the windshield W or disposed in the windshield W (as shown in the ninth figure).

FIG. 5 is a schematic view of another embodiment of a concave mirror module 3 according to a first embodiment of the present invention, wherein the concave mirror module 3 is disposed in a casing 34, and the concave mirror module 3 is The concave mirror 31 is composed of a plurality of reflective lenses 33, thereby lengthening the distance of the optical path L and reflecting the image projected by the image projection module 1.

As shown in FIG. 6 , a second embodiment of the head-up display device for remote imaging of the present invention includes: an image projection module 1 disposed under the instrument panel A below the windshield W of a vehicle. And projecting the image light source, the image projection module 1 is a digital light processing device (Digital Light Processing, abbreviated as DLP, the image projection device 1 is utilized in one a developing technique in a projector and a rear projection television; a reflective diffuser 2 disposed at a boundary between the ceiling C of the vehicle and the windshield W, and an optical path L of the output image source of the image projection module 1 The reflective diffuser 2 is imaged on the reflective diffuser 2, and the reflective diffuser 2 is formed as a screen for displaying an image. The reflective diffuser 2 further includes a rotating shaft 21 through which the rotating shaft 21 is passed. The rotation mirror can adjust the position of the image projected under the windshield W; a concave mirror module 3 is disposed under the instrument panel A, and the concave mirror module 3 is covered with a transparent dustproof cover A1, and the concave mirror module 3 A concave mirror 31 and a motor gear set 32 are provided, and the reflection angle of the concave mirror 31 is adjusted by the rotation of the motor gear set 32. The concave mirror module 3 enlarges and projects the image of the reflective diffusion sheet 2 to the driver. The eye E; by the above-mentioned structural composition, the distance between the reflective diffuser 2 and the concave mirror module 3 can obtain a far distance of the optical path without wasting space, wherein the principle of virtual image imaging is through the concave surface Imaging of the mirror 31, concave mirror imaging formula: 1/p+1/q=1/f; f: focal length, q: object distance, p: image distance, general magnification can enlarge the virtual image, and can also make the virtual image distance at the same ratio Farther away, thus at the same magnification of the concave mirror 31, the virtual image D of the far projection distance is obtained as its characteristic.

As shown in the seventh figure, the head-up display device for remote imaging of the present invention further includes a reflective film 4 disposed on the windshield W to improve the reflectivity of the virtual image D. 4 is disposed inside the windshield W or disposed in the windshield W (as shown in FIG. 9).

FIG. 8 is a schematic view showing another embodiment of the concave mirror module 3 according to the second embodiment of the present invention, wherein the concave mirror module 3 is composed of the concave mirror 31 and a plurality of mirrors. The sheet 33 is formed to lengthen the distance of the optical path L and reflect the image projected by the image projection module 1.

In summary, the head-up display device for remote imaging of the present invention can use a reflective diffuser with a concave mirror module to increase the reflection distance in a limited space, so as to obtain a far distance of the optical path, so that the same Under the magnification of the concave mirror, the virtual image of the far projection distance can be obtained, so as to reduce the visual stun of the driver and obtain an optimal visual effect, thereby improving driving safety, thereby effectively solving the existing missing display, and the invention uses The technical means is not the prior art, and therefore the invention has the novelty and progressive requirements of the patent.

The specific embodiments of the present invention are provided to facilitate the description of the technical content of the present invention, and the present invention is not limited to the above embodiments, and the patent application without departing from the spirit of the present invention In the case of a range, various changes are made and still fall within the scope of the invention.

Claims (10)

A head-up display device for remote display, comprising: an image projection module, an instrument panel disposed under a windshield of a vehicle; and a reflective diffuser disposed at a boundary between the ceiling of the vehicle and the windshield The output light source of the image projection module is directed to the reflective diffuser and imaged on the reflective diffuser to make the reflective diffuser a screen for displaying images; a concave mirror module disposed on the windshield of the vehicle The instrument panel under the glass, the concave mirror module magnifies the image of the reflective diffuser; by the above structure, the distance between the reflective diffuser and the concave mirror module is obtained without wasting space The far optical path distance, and thus the virtual image of the far projection distance is the same under the same concave mirror magnification. The head-up display device for remote imaging according to claim 1, wherein the image projection module is a digital light processing device (DLP). The head-up display device for long-distance imaging according to claim 1, wherein the concave mirror module is disposed under the instrument panel, and the concave mirror module is covered with a transparent dust cover. The head-up display device for remote imaging according to the first aspect of the invention, wherein the concave mirror module is disposed above the instrument panel, and the concave mirror module is disposed in a casing. The head-up display device for remote imaging according to claim 1, wherein the concave mirror module comprises a concave mirror and a motor gear set, and the reflection angle of the concave mirror is adjusted by the rotation of the motor gear set. The head-up display device for remote imaging according to claim 1, wherein the concave mirror module is composed of the concave mirror and a plurality of reflective lenses. The head-up display device for remote imaging according to claim 1, wherein the reflective diffusion sheet further comprises a rotating shaft, and the rotation of the rotating shaft is used to adjust a position projected on the image below the windshield. . The head-up display device for remote imaging according to claim 1, further comprising a reflective film disposed on the windshield. The head-up display device for remote imaging according to claim 1, wherein the concave mirror module enlarges and projects the image of the reflective diffusion sheet to the driver's eyes. The head-up display device for remote imaging according to claim 1, wherein the concave mirror module enlarges the image of the reflective diffusion sheet and projects the windshield, and the windshield is reflected by the windshield The driver's eyes.