TWI587005B - Composite car head display device - Google Patents

Description

Compound vehicle head-up display device

The invention relates to a composite head up display (HUD), in particular to using a dynamic display to display a dynamic picture, and using a static display to display fixed pattern information, and at least one dynamic display and at least one The composite display unit consisting of static displays can increase the viewing angle, provide more information, and improve brightness and power. It can effectively simplify the optical system under the same viewing angle, greatly reducing the cost and improving the image quality.

With the advancement of optics and electronic technology, Head Up Display, generally referred to as HUD, has been widely used as an aviation aid on aircraft. Specifically, head-up refers to the fact that the pilot or driver can see the important flight information required within the normal viewing angle without having to bow down, which can reduce the frequency of looking down the meter, avoid interruption of attention, or lose consciousness of the state. Mastery to improve flight safety. Therefore, the head-up display can integrate and replace the traditional instruments of various types, such as speedometers, fuel gauges, anemometers, warning lights, aircraft attitude meters and so on.

Head-up displays first appeared on military aircraft, and due to the ease of operation and improved flight safety of head-up displays, in recent years, civil aircraft have also been installed. In addition, some automakers have also tried to install the head-up display on the car to enhance driving safety and as a marketing tool to attract customers.

Referring to the first figure, a schematic diagram of a configuration of a head-up display HUD in the prior art, wherein the head-up display HUD is generally disposed behind the steering wheel WH and below the windshield WS, so that the head-up display HUD can project an image to a light combiner (Combiner) ), and borrowed light synthesizer The reflection of the surface is projected onto the driver's eye EY, while the actual image seen is a virtual image rather than a real image. The optical synthesizer is a semi-transparent planar or curved optical component with splitting and combining functions, allowing the driver to see the virtual image projected by the road and the head-up display at the same time. The partial head-up display utilizes the windshield of the car (as shown in the first figure). In WS), as a light synthesizer.

In the conventional technology, a general vehicle type head-up display can be roughly classified into a simple head-up display and a remote virtual-image head-up display. The former uses a Vacuum Fluorescent Display (VFD), which has a brightness that is far less than necessary, and has no virtual image magnification effect, so that the competitiveness is low. The latter uses a micro projector or liquid crystal display (LCD) as the display device. However, in addition to the display itself, it must be combined with a virtual image optical system (Relay Optics) to realize the remote imaging function. Furthermore, if the image is generated using a micro projector system, the image must first be projected onto a diffused screen to form a real image, and then connected to the virtual image magnifying optical system to form a distant virtual image, and if a liquid crystal display is used ( LCD), can directly connect the virtual image of the back end of the magnifying optical system to form a distant virtual image.

However, whether a micro projector or an LCD is used to provide images is a single display device, and the disadvantage is that the design of the rear virtual image amplifying system is not easy, and the Aberration of the large viewing angle cannot be effectively eliminated by using a compact optical structure. A small range of viewing angles leads to less display information, which limits the application efficiency of the head-up display; if the viewing angle is to be increased, the number of optical components is increased, resulting in difficulty in production and a significant increase in cost. In addition, the transmittance of the LCD is very low, which easily leads to the problem of insufficient brightness, so that the displayed information cannot be clearly seen under the sun, and the visual effect is affected. Therefore, this case proposes a new type of composite vehicle head-up display device, which can increase the viewing angle by using multiple display devices, provide more information, improve brightness and power, and also reduce cost, especially in the same viewing angle condition. This effectively simplifies the optical system and greatly improves the image quality, thereby solving the problems of the above-mentioned conventional technology.

The main object of the present invention is to provide a composite vehicle head-up display device according to the use situation, and use a curved surface developing device to effectively eliminate aberrations, and the composite display device can also increase efficiency, reduce power consumption, and solve conventional technical problems. .

In order to achieve the above functions, the composite vehicle head-up display device of the present invention is disposed in front of the driver's seat of the vehicle and located behind the steering wheel in the vehicle, and the structure thereof includes a composite display unit, a virtual image magnifying optical system (Relay Optics), The illumination system, the control unit, the optical combiner, and the housing, wherein the housing encloses the display unit, the virtual image magnifying optical system, the illumination system, and the control unit to provide isolation protection. Specifically, the composite vehicle head-up display device can drive the composite display unit to generate an image by the control unit, and project the image information into the virtual image magnifying optical system by the rear illumination system, and use the virtual image magnifying optical system to generate the image information. Zooming in to form a long-distance virtual image, and guiding it to the optical combiner, and then reflecting through the surface of the optical combiner to project to the driver's eyes, so that the driver of the vehicle visually thinks that the virtual image and the road condition at the front can be seen at the same time. Real scene.

The composite display unit comprises at least one dynamic display and at least one static display, wherein the dynamic display is used to display dynamic images, such as navigation information images, rates, etc., and the static display can be used to display fixed pattern information, including common dashboards. Patterns such as seat belts, oil gauges, gears, etc.

The dynamic display can include a liquid crystal display (LCD) or a projector, which is a small-sized flat-panel display, and the static display can be used to draw a fixed pattern by machining, thereby providing fixed image information, especially a static display can be made into Special curved surfaces to eliminate aberrations from large viewing angles.

1‧‧‧Composite vehicle head-up display device

10‧‧‧Composite display unit

11‧‧‧Dynamic display

12‧‧‧Static display

20‧‧‧virtual image magnifying optical system

21‧‧‧ positive lens

22‧‧‧planar mirror

221‧‧‧First curved mirror

23‧‧‧beam splitter

24‧‧‧Second curved mirror

30‧‧‧Control unit

40‧‧‧Lighting system

50‧‧‧shell

60‧‧‧Photos synthesizer

EY‧‧ eyes

HUD‧‧‧ head-up display

VS‧‧‧ virtual image

WH‧‧‧ steering wheel

WS‧‧‧windshield

The first figure is a schematic diagram of the configuration of the head-up display in the conventional technology.

The second figure is a configuration diagram of a composite vehicle head-up display device according to an embodiment of the present invention. intention.

The third figure is a schematic diagram of the configuration of the composite display unit and the virtual image amplifying optical system in the second figure.

FIG. 4 is a schematic view showing the configuration of a composite vehicle head-up display device according to another embodiment of the present invention.

The fifth figure is a schematic diagram of the configuration of the dynamic display and the static display of the present invention.

The sixth figure is a schematic diagram of driving information displayed by the present invention.

The seventh figure is a schematic diagram of another driving information displayed by the present invention.

The embodiments of the present invention will be described in more detail below with reference to the drawings and the reference numerals, which can be implemented by those skilled in the art after having studied this specification.

Please refer to the second and third figures, which are respectively a schematic configuration diagram and a schematic diagram of main components of an embodiment of the present invention. It is to be noted that in order to clearly illustrate the main features of the present invention, the relative relationship between the main components is only shown in a schematic manner, and is not drawn according to the actual size. Therefore, the number of main components in the figure of this embodiment, The thickness, size, shape, arrangement, configuration, etc. are for reference only and are not intended to limit the scope of the invention.

As shown in the second and third figures, the composite vehicle head-up display device 1 of the present embodiment is disposed behind the steering wheel (not shown) in the vehicle, and mainly includes a composite display unit 10 and a virtual image enlargement. An optical system (Relay Optics) 20, a control unit 30, an illumination system 40, and a housing 50 for providing a head-up display function by the optical combiner 60, wherein the optical combiner 60 can be a windshield or a translucent flat plate of the vehicle, and The housing 50 encloses the display unit 10, the virtual image amplifying optical system 20, the control unit 30, and the illumination system 40 to provide isolation and protection. The virtual image magnifying optical system 20 is used to realize the imaging function of the distant virtual image.

Overall, the device can drive the composite display unit 10 by the control unit 30 to generate The image is projected by the rear illumination system 40 from the light to the virtual image magnifying optical system 20, and the image light can be further projected to the optical combiner 60 by the guidance of the virtual image magnifying optical system (such as the windshield of the vehicle or The translucent plate), after being reflected by the surface of the optical combiner 60, is projected onto the driver's eye EY, so that the driver of the vehicle is visually considered to be seeing a virtual image located in front of the windshield.

Specifically, as shown in the third figure, the composite display unit 10 can include at least one dynamic display 11 and at least one static display 12, wherein the dynamic display 11 is used to display dynamic images, such as navigation information images, rates, and the like. The static display 12 can be used to display fixed pattern information, including patterns common to general instrument panels, such as seat belts, oil meters, gears, and the like. It should be noted that the third figure shows a single dynamic display 11 and two static displays 12, wherein the dynamic display 11 is disposed in the middle, and the two static displays 12 are respectively disposed on the two sides of the dynamic display 11, however, The configuration shown in the third figure is only for the convenience of clearly illustrating the features of the present invention, and is not intended to limit the scope of the present invention, that is, the dynamic display 11 and the static display 12 in the composite display unit 10 may be required according to actual needs. With any number and configuration orientation.

Preferably, the dynamic display 11 can include a liquid crystal display (LCD) or a projector, which is a small-sized flat-panel display, and the static display 12 can be used to draw a fixed pattern by machining to provide fixed image information, especially The static display can be made into a special curved surface, which can eliminate the aberration of large viewing angle.

Referring to the third embodiment, the composite display unit 10 includes a central flat panel display 11 for displaying dynamic information; and a curved display 12 on both sides for displaying static images (Icons); and the composite display unit 10 as a whole The first side of the virtual image amplifying optical system 20 is disposed. The main purpose of the virtual image amplifying optical system 20 is to realize a remote imaging function, including a positive lens 21, a plane mirror 22, a beam splitter 23, and a curved surface reflection. The mirror 24, wherein the positive lens 21 and the curved mirror 24 function to enlarge the image to form a distant virtual image; and the positive lens 21 is a dynamic flat display disposed in front of the composite display unit 10 and frontally aligned with the front of the composite display unit 10. 11, the plane mirror 22 is disposed on the second side of the virtual image amplifying optical system 20, and the alignment is positive A first inclination angle is formed between the lens 21 and the positive lens 21. Furthermore, the beam splitter 23 is disposed above the virtual image amplifying optical system 20 and forms a second tilt angle with the planar mirror 22, and the curved mirror 24 is disposed below the virtual image amplifying optical system 20 and aligned The first beam splitter 23 and the beam splitter 23 form a third tilt angle.

The positive lens 21 can receive the image light from the dynamic flat panel display 11 and re-project it to the planar mirror 22 via the corrected penetration of the positive lens 21.

The plane mirror 22 reflects the image light from the positive lens 21 and the curved display from both sides, and then projects to the front surface (lower plane) of the beam splitter 23, wherein a part of the image light from the plane mirror 22 is reflected by the beam splitter 23 to The curved mirror 24, and the curved mirror 24 can form a virtual image from the beam splitter 23 and reflect back to the front surface of the beam splitter 23, and partially penetrate and project from the back surface (upper plane) of the beam splitter 23 to the optical combiner. 60, and then reflected by the surface of the optical combiner 60 to the driver's eye position. More specifically, the first tilt angle, the second tilt angle, and the third tilt angle described above are specifically designed such that an optical axis of the optical system passes through the symmetry axis of the positive lens 21 and is perpendicular to the second The center of the curved mirror 24 thus forms an on axis optical system, which helps to reduce the aberration of the paraxial axis. The curved display on both sides can be effectively reduced by the design of the specific curved surface. The off-axis aberration, when combined with the two, can greatly improve the quality of the virtual image, thereby increasing the viewing angle, and is advantageous for assembly production and cost reduction.

As shown in the fourth figure, another embodiment of the present invention is a composite display unit, a first curved mirror 221, a second curved mirror 24, a light combiner 60; The first curved mirror 221 is disposed on the side of the virtual image amplifying optical system 20, and is aligned with the composite display unit 10 and forms a first inclined angle with the composite display unit 10. Furthermore, the second curved mirror 24 is disposed below the virtual image amplifying optical system 20 and forms a second oblique angle with the first curved mirror 221, and the optical combiner 60 is disposed above the virtual image amplifying optical system 20. And aligning with the second curved mirror 24 and forming a third oblique angle with the second curved mirror 24.

The image light from the composite display unit 10 is projected onto the first curved mirror 221, and the first curved mirror 221 reflects the image from the composite display unit 10 (including the dynamic display 11 from the middle and the static display 12 from both sides). The light is reflected to the second curved mirror 24, and the second curved mirror 24 reflects the image light and directs it to the optical combiner 60, and then reflects the surface of the optical combiner 60 to the driver's eye EY position, and transmits the optical combiner. a surface 60 that forms a virtual image in front of the distal end of the driver's eye EY; since the optic-al axis of the optical system does not pass through the symmetry axis of the first curved mirror 221 and the second curved mirror 24, The off-axis optical system (Off-axis Opical System) can also eliminate a part of the aberration by the curved surface characteristics of the static display on both sides, thereby improving the image quality, increasing the viewing angle and reducing the cost.

To further illustrate the features of the present invention, reference may be made to the schematic diagrams of the driving information of the sixth and seventh figures, but only a single dynamic picture and a single fixed pattern information are displayed, which are respectively located on the right side and the left side, wherein the dynamic picture includes navigation information (may be instant Navigation map, or simple navigation information showing driving position and direction) and dynamic digital display (such as speed, speed limit, distance, etc.), while fixed pattern information shows oil gauge, air conditioner operating status, air volume, seat belt, Handcuffs and so on.

The invention is suitable for application in the field of vehicles, and provides a head-up display function, so that the driving of the vehicle can directly see the driving information and navigation map of the current vehicle directly on the windshield plate without having to bow or swing the head, and assist the driver in real time. Understand the driving dynamics, think that necessary measures, improve driving safety, and therefore have industrial utilization.

In summary, the main feature of the present invention is that the composite display unit has the effect of a curved display device, which can effectively eliminate aberrations, increase the viewing angle to provide richer information, and simplify the overall system structure to achieve cost reduction. In addition, the light energy of the illumination device behind the non-planar display portion does not have the problem that the low transmittance is attenuated, and the overall optical efficiency can be further improved.

Another feature of the present invention is that the dynamic display is used to display the dynamic picture, and the static display is used to display the fixed pattern information, which simplifies the design of the integrated composite display unit. In particular, the virtual image amplifying optical system has a relatively simple optical design and can improve the product. Yield, with technology The advantages of progressive and economic effects.

The above is only a preferred embodiment for explaining the present invention, and is not intended to limit the present invention in any way, and any modifications or alterations to the present invention made in the spirit of the same invention. All should still be included in the scope of the intention of the present invention.

1‧‧‧Composite vehicle head-up display device

10‧‧‧Composite display unit

20‧‧‧virtual image magnifying optical system

21‧‧‧ positive lens

22‧‧‧planar mirror

23‧‧‧beam splitter

24‧‧‧ curved mirror

30‧‧‧Control unit

40‧‧‧Lighting system

50‧‧‧shell

60‧‧‧Photos synthesizer

EY‧‧ eyes

Claims (7)

A composite vehicle head-up display device is disposed behind a steering wheel of a vehicle for providing a head-up display function, comprising: a composite display unit comprising at least one dynamic display and at least one static display, the dynamic display is a The flat display is used to display a dynamic picture, and the display surface of the static display is a curved structure with a meter pattern and is used to display a fixed pattern information, wherein the dynamic display is disposed in the middle of the composite display unit, and The static display is disposed on a side of the dynamic display; an illumination system is disposed behind the composite display unit for providing a light source, illuminating and transmitting image light through the composite display unit; and a virtual image magnifying optical system, The image is used to form the remote virtual image of the composite display unit; a control unit drives the image information of the composite display unit; and a casing covers the display unit, the virtual image magnifying optical system, The control unit and the illumination system provide isolation and protection; An optical combiner, the distance may be the projected image is reflected to the driver's eyes. The composite vehicle head-up display device according to claim 1, wherein the dynamic display comprises a lithography machine and a diffusion screen. A composite vehicle head-up display device according to claim 2, wherein the flat-panel display is a liquid crystal display (LCD). A composite vehicle head-up display device according to claim 1, wherein the optical combiner is a windshield plate of the vehicle. A composite vehicle head-up display device according to claim 1, wherein the light combiner is a partially transparent reflective member. The composite vehicle head-up display device according to the first aspect of the invention, wherein the virtual image amplifying optical system comprises a positive lens, a plane mirror, a beam splitter and a curved mirror, and the positive lens system is disposed on the The light exit side of the dynamic display. The positive lens is a dynamic planar display disposed in front of the composite display unit and facing the front of the quasi-composite display unit, and the planar mirror is disposed on a side of the virtual image amplifying optical system, and the positive lens is aligned And forming a first tilt angle with the positive lens; the beam splitter is disposed above the virtual image magnifying optical system, and forms a second tilt angle with the planar mirror, wherein the curved mirror is disposed on the virtual image Amplifying the underside of the optical system and aligning the beam splitter with a third tilt angle with the beam splitter. The composite vehicular head-up display device of claim 1, wherein the virtual image optical amplifying system comprises a first curved mirror and a second curved mirror, and the static display of the composite display unit is disposed on the dynamic display On both sides, the display surface of the static display is a curved structure, and the front surface of the composite display unit is aligned with the dynamic flat display in the middle of the composite display unit, and the first curved mirror is disposed on the virtual image magnifying optical system. a side of the composite display unit and forming a first tilt angle with the composite display unit; further, the optical combiner is disposed above the virtual image magnifying optical system and reflected with the second curved surface Mirror Forming a third tilt angle therebetween, and the second curved mirror is disposed under the virtual image magnifying optical system, and is aligned with the first curved mirror, and forms a second tilt angle with the first curved mirror .