CN204347350U - A kind of vehicle-mounted head-up display - Google Patents

Abstract

The utility model discloses a vehicle-mounted head-up display device with simple structure. The vehicle-mounted head-up display device cooperates with a windshield and comprises: a display unit for displaying a real picture and outputting visible light containing the information of the real picture; a plane mirror , used to receive and reflect the visible light output by the display unit; a lens group, used to receive the light reflected by the plane mirror and refract it to the windshield, and the image corresponding to the real picture formed by the lens passes through the The windscreen is again imaged in front of the driver. The vehicle-mounted head-up display device utilizes the characteristics of a convex lens to form a magnified virtual image within a single focal length, and the flat mirror forms a perfect image without changing the symmetry properties of the optical system, and can obtain an effectively enlarged and distortion-free image; the vehicle-mounted head-up display device can be obtained through a single Lens can be realized, and multi-lens combination can also be used to obtain better image quality.

Description

A vehicle-mounted head-up display device

technical field

The utility model relates to the field of display technology, in particular to a vehicle-mounted head-up display device.

Background technique

Vehicle head-up display (HUD) is an emerging industry, which is changing from aristocratic to popular, and the market heat continues unabated. The vehicle-mounted head-up display can display various information of the vehicle in the form of virtual imaging two to three meters or more in front of the windshield, that is, in the direct field of vision of the driver. Its significance is that the driver does not have to look down while driving. Vehicle Information. When the vehicle is moving forward at a speed of 100 kilometers per hour, if the driver looks away from the front and checks the speedometer for just one second, the vehicle has already traveled 28 meters forward, and danger may have occurred. Of course, this information is not only speed information, but also navigation information and other warning information, such as lane departure warning, pedestrian avoidance warning of night vision system with pedestrian recognition function, etc. Therefore, the vehicle head-up display has a very good auxiliary effect on the driving safety of the vehicle.

The current common implementation method is basically to realize the imaging of the display source (LCD screen, OLED, laser scanning, etc.) through the concave mirror, although the concave mirror can be divided into translucent and non-transparent. The biggest disadvantage of this kind of reflective imaging is that the image is easily blocked and interfered by the display source itself, so an asymmetric off-axis system must be used to design, but the off-axis system design will inevitably bring about image distortion, and generally requires a dedicated image processing IC Compensation, but this kind of compensation is often effective for relatively regular trapezoidal distortion, but the actual image distortion performance is not single, and the adjustment effect cannot be guaranteed evenly when adapting to different driver heights and driving habitual distances.

Utility model content

In order to solve the above-mentioned deficiencies in the prior art, the utility model provides a vehicle-mounted head-up display device with a simple and compact structure. The vehicle-mounted head-up display device is realized by using a symmetrical optical system transmission imaging, which can improve graphic distortion and improve display quality. Small image distortion can also be achieved in a wider area.

The technical problem to be solved by the utility model is realized through the following technical solutions:

A vehicle-mounted head-up display device, matched with a windshield, comprising:

A display unit for displaying the physical picture and outputting visible light containing the information of the real picture;

a flat mirror for receiving and reflecting the visible light output by the display unit;

A lens group is used to receive the light reflected by the plane mirror and refract it to the windshield, and form a virtual image corresponding to the real image at a certain distance in front of the windshield.

Preferably, the display unit is a liquid crystal display unit or a plasma display unit or a digital light processing unit or an OLED display unit or a liquid crystal on silicon display unit or a laser scanning unit.

Preferably, the lens group includes a convex lens.

Preferably, the lens group includes a plurality of lenses coaxially arranged.

Preferably, the plane mirror is a non-transparent plane mirror.

Preferably, the outgoing light along the central symmetry axis of the solid image coincides with the optical axis of the lens group after being reflected by the plane mirror.

The utility model has the following beneficial effects: the vehicle-mounted head-up display device uses the characteristic of a convex lens to form a magnified virtual image within a single focal length, and the plane mirror is perfect for imaging without changing the symmetry properties of the optical system, that is, the appearance of the solid picture along the direction of the central symmetry axis After the incident light is reflected by the plane mirror and coincides with the optical axis of the lens group, an effectively enlarged image without distortion can be obtained; at the same time, a larger optical path can be obtained in a limited space, which is beneficial to compress the volume of the device and make it more compact and miniaturized; the vehicle-mounted The head-up display device can be realized by a single lens, or a combination of multiple lenses can be used to obtain better image quality.

Description of drawings

Fig. 1 is a principle schematic diagram of an embodiment of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

Referring to FIG. 1 , the utility model provides a vehicle-mounted head-up display device, which cooperates with a windshield 4 and includes: a display unit 1 , a plane mirror 2 and a lens group 3 .

The display unit 1 is connected with a drive circuit board, and the drive circuit board is connected with electronic terminals such as automobile instruments, navigators or smart phones by wired or wireless communication, and is used to collect required display information such as driving speed, engine speed, Water temperature, navigation direction, distance or traffic conditions, tire pressure information, etc., and send the collected display information to the display unit 1 . After the display unit 1 obtains the display information, it outputs the visible light L and displays a solid picture, receives and reflects the visible light L through the plane mirror 2, and the lens group 3 receives the visible light L reflected by the plane mirror 2 to obtain an enlarged virtual image Then through the windshield 4 reflective imaging at some distances ahead of the windshield 4, a virtual image 11 corresponding to the real picture is formed, so that the driver 5 can directly raise his head to watch the driving information, so it can effectively improve Driver 5's driving safety.

The display unit 1 can be controlled to adjust the intensity and grayscale of light emitted, transmitted or reflected by each display pixel to generate a real picture. The display unit 1 generally includes a light source and a display module. The display module generates a display screen by modulating the light signal provided by the light source. The information on the display screen can be information such as vehicle speed, driving distance, driving environment or surrounding conditions, etc. . The light source is preferably but not limited to an LED light source. The display unit 1 can also be a self-illuminating display unit. The display unit 1 is preferably but not limited to a liquid crystal display unit (LCD) or a plasma display unit (PDP) or a digital light processing unit (DLP) or an OLED display unit or a liquid crystal on silicon display unit (LCoS) or a laser scanning unit. It may be an image formed by a display screen passing through an optical system.

The plane mirror 2 receives the visible light L modulated and outputted from the display element and reflects it so as to change the direction of the light path. Preferably but not limited, the plane mirror 2 is a non-transparent plane mirror or a partially transparent plane mirror. The position requirement of the plane mirror is to realize that the outgoing light along the central symmetry axis direction of the solid picture coincides with the optical axis of the lens group after being reflected by the plane mirror.

Preferably but not limited, the lens group 3 includes a convex lens.

Preferably but not limited, the lens group 3 includes a plurality of lenses coaxially arranged. The multiple lenses can achieve better image quality than a single convex lens. The technical solution for obtaining better image quality by setting multiple lenses coaxially belongs to the field of lens optics, and has no special requirements and various implementation methods, which will not be repeated here.

The utility model utilizes a single plane mirror and a lens group to enlarge and image the solid picture generated by the display unit, and then forms the image through the windshield of the automobile to obtain a simple and practical vehicle-mounted head-up display device. Compared with the existing head-up display devices realized by concave mirrors, this vehicle-mounted head-up display device makes full use of the advantages of the symmetrical optical system, the obtained image distortion is small, the magnification is high, the adjustment operation is simple, and it is suitable for different scenes and groups of people. Strong applicability of usage habits.

The above-mentioned embodiments only express the implementation manner of the present utility model, and its description is comparatively specific and detailed, but can not therefore be interpreted as the restriction to the patent scope of the present utility model, as long as adopt the form of equal replacement or equivalent transformation to obtain All technical solutions should fall within the protection scope of the present utility model.

Claims (6)

1. a vehicle-mounted head-up display, coordinates a windshield, it is characterized in that, comprising:

One display unit, for display entity picture and output packet containing the visible ray of entity image information;

One level crossing, for receive and reflect described display unit export visible ray;

One lens combination, for receiving the light after by described flat mirror reflects and refracting to described windshield, forms through described windshield the virtual image that corresponds to described entity picture.

2. vehicle-mounted head-up display according to claim 1, is characterized in that, described display unit is liquid crystal display or plasma display units or digital light processing unit or OLED display unit or silicon-based liquid crystal display unit or laser scan unit.

3. vehicle-mounted head-up display according to claim 1, is characterized in that, described lens combination comprises convex lens.

4. vehicle-mounted head-up display according to claim 1, is characterized in that, described lens combination comprises multiple lens of coaxial setting.

5. vehicle-mounted head-up display according to claim 1, is characterized in that, described level crossing is non transparent plane mirror.

6. vehicle-mounted head-up display according to claim 1, is characterized in that, described entity picture centrally symmetrical axial emergent light after flat mirror reflects with the optical axis coincidence of lens combination.