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KR20170008431A - Head up display - Google Patents

Head up display Download PDF

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Publication number
KR20170008431A
KR20170008431A KR1020150099589A KR20150099589A KR20170008431A KR 20170008431 A KR20170008431 A KR 20170008431A KR 1020150099589 A KR1020150099589 A KR 1020150099589A KR 20150099589 A KR20150099589 A KR 20150099589A KR 20170008431 A KR20170008431 A KR 20170008431A
Authority
KR
South Korea
Prior art keywords
image output
image
light
output device
optical module
Prior art date
Application number
KR1020150099589A
Other languages
Korean (ko)
Inventor
김영진
이경일
김동욱
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020150099589A priority Critical patent/KR20170008431A/en
Publication of KR20170008431A publication Critical patent/KR20170008431A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Instrument Panels (AREA)

Abstract

A head-up display device according to one aspect includes: an image output device for outputting an image; An optical module placed in front of the image output device and providing an optical path of light output from the image output device; And a reflector for receiving the image output from the image output device and projecting the image onto a windshield, wherein the optical module includes an incident surface on which the light outputted from the image output device is incident and a light incident on the incident surface, .

Description

HEAD UP DISPLAY [0002]

The present invention relates to a head-up display device mounted on a vehicle or the like.

HUD (Head Up Display) is a major concern, as there are several systems under development that provide drivers with safety during driving and provide vehicle drivers with information on driving and surrounding conditions effectively.

HUD is a system that provides vehicle driving information or other information to the front of the driver during the driving of the vehicle or aircraft, ie, without departing from the driver's main visual field. In the early days, the HUD was a vehicle HUD that was developed to be attached to an aircraft, especially a fighter.

There is usually a risk because it moves about 55m to the time (about 2 seconds) to put the field of vision on the dashboard while driving at a speed of about 10m / h. One way to reduce this risk is to develop a car HUD. The vehicle HUD displays the information (speed, mileage, RPM, etc.) of the instrument panel on the driver's main field of view of the windshield so that the driver can easily navigate the vehicle while driving. This allows the driver to operate safely by recognizing important driving information without having to take his or her eyes off the road.

Korean Patent Laid-Open Publication No. 10-1008-0050669, which is a prior art document, discloses a " head-up display device for a vehicle ".

In the conventional head-up display device, the virtual image distance of the image projected onto the windshield is determined according to the length of the optical path between the image output device and the reflecting portion.

On the other hand, if a sufficient virtual image distance of the image projected on the windshield is not ensured, the image may be distorted.

Therefore, in order to secure a sufficient virtual image distance, the length of the optical path between the image output device and the reflecting part must be increased, but the volume of the head-up display device increases in this process.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a head-up display device capable of ensuring a sufficient virtual image distance and efficiently utilizing space.

According to one aspect of the present invention, there is provided a head-up display device comprising: an image output device; An optical module placed in front of the image output device and providing an optical path of light output from the image output device; And a reflector for receiving the image output from the image output device and projecting the image onto a windshield, wherein the optical module includes an incident surface on which the light outputted from the image output device is incident and a light incident on the incident surface, .

According to the embodiment proposed in the present invention, the light outputted from the image output device is totally reflected by using the optical module, so that it is possible to secure a sufficient virtual distance even in a physically narrow space.

Further, by using the curved display panel, even if the optical path is formed relatively short, the distortion of the image projected on the windshield can be prevented.

In addition, when a laser scanner is used, the distortion of the image projected on the windshield can be corrected.

FIG. 1 is a diagram showing a schematic configuration of a conventional head-up display device.
FIG. 2 is a view showing a schematic configuration of a head-up display device according to a first embodiment of the present invention.
FIG. 3 is a schematic view of a head-up display device according to a second embodiment of the present invention.
FIG. 4 is a diagram illustrating a schematic configuration of a head-up display apparatus according to a third embodiment of the present invention.
FIG. 5 is a diagram illustrating a schematic configuration of a head-up display device according to a fourth embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings.

FIG. 1 is a diagram showing a schematic configuration of a conventional head-up display device.

Referring to FIG. 1, a conventional head-up display device 1 includes an image output device 2, a first reflector 3, and a second reflector 4.

The image output apparatus 2 may display an image of vehicle driving information including various driving information such as a running speed of the vehicle and the number of revolutions of the engine, navigation information, and the like.

The optical path of the image image output from the image output device 2 can be changed by the first reflecting unit 3. [ Specifically, the image output from the image output device 2 may be reflected by the first reflector 3 to the second reflector 4.

The image reflected by the second reflecting portion 4 can be projected onto the windshield 5 of the vehicle.

Thus, the virtual image 6 of the image output from the image output device 2 is formed in front of the windshield 5. The user 7 can confirm the image output from the image output apparatus 2 through the virtual image 6. [

The image outputted from the image output device 2 is projected onto the windshield 5 via the first reflecting portion 3 and the second reflecting portion 4 so that the image output device 2 can directly The optical path is increased as compared with that projected onto the windshield 5.

Distortion of the image projected onto the windshield 5 may occur if the optical path of the image output from the image output device 2 is not sufficiently secured.

Also, as the optical path of the image output from the image output device 2 increases, the size of the virtual image 6 can be enlarged as compared with the size of the image output from the image output device 2. [

However, in order to increase the optical path from the image output device 2 to the windshield 5, it is preferable that in the image output device 2, between the first reflecting portion 3 and the second reflecting portion 4 Should be increased.

In this case, the volume of the head-up display device 1 itself is increased. When the bulky head-up display device 1 is applied to a limited vehicle interior space, there is a disadvantage in terms of space utilization.

FIG. 2 is a view showing a schematic configuration of a head-up display device according to a first embodiment of the present invention.

2, the head-up display apparatus 10 according to the first embodiment of the present invention includes an image output apparatus 20, an optical module 30, and a reflector 40. [

The image output apparatus 20 can output the driving information to the image.

The image output device 20 includes a device capable of outputting an image image such as a projector or a liquid crystal panel.

For example, the image output apparatus 20 may include a liquid crystal panel and a backlight. An image is output to the liquid crystal panel, and the backlight can irradiate light to the transparent liquid crystal panel.

The image output from the image output device 20 can be projected onto the windshield 5 by the reflector 40 via the optical module 30. [

The reflective portion 40 may include concave mirrors as shown, but is not limited thereto.

The optical module 30 may be provided in front of the image output device 20. The optical module 30 may reflect the light output from the image output device 20 and project it to the reflector 40.

The optical module 30 may include a light guide. Total reflection of light may occur within the light pipe.

Accordingly, the optical module 30 can propagate the light output from the image output device 20 in one direction.

The optical module 30 may include an incident surface 31, a first reflective surface 32, a second reflective surface 33, a third reflective surface 34, and an exit surface 35.

The incident surface 31 may be disposed adjacent to the image output device 20. [ The light output from the image output device 20 may be incident on the optical module 30 through the incident surface 31.

The light incident on the incident surface 31 is totally reflected by the first reflection surface 32 and the light totally reflected by the first reflection surface 32 is directed to the second reflection surface 33.

The light reaching the second reflecting surface 33 is totally reflected by the second reflecting surface 33 to be directed to the first reflecting surface 32.

The first reflection surface 32 and the second reflection surface 33 may be formed to face each other. The light incident on the optical module 30 is propagated along the axial direction of the optical module 30 while being totally reflected by the first reflection surface 32 and the second reflection surface 33 .

The light totally reflected by the first reflecting surface 32 and the second reflecting surface 33 may be changed by the third reflecting surface 34 provided at the other end of the optical module 30 have.

For example, the direction of the light reflected by the third reflecting surface 34 may be changed so that the light is directed in a direction opposite to the direction in which the image is outputted from the image output apparatus 20. [

The light reflected by the third reflection surface (34) is emitted to the emission surface (35). The emission surface 35 may be formed facing the reflective portion 40 as well.

The light emitted to the exit surface 35 is projected to the reflector 40 and the reflector 40 reflects the image output from the image output device 20 to the windshield 5 Projected.

When the optical module 30 including the optical waveguide is provided as described above, the amount of light output from the image output device 20 can be increased without increasing the distance between the image output device 20 and the reflection part 40. [ The light path can be increased.

Hereinafter, a head-up display device according to a second embodiment of the present invention will be described.

FIG. 3 is a schematic view of a head-up display device according to a second embodiment of the present invention.

Referring to FIG. 3, the head-up display apparatus 100 according to the second embodiment of the present invention includes an image output apparatus 120, an optical module 130, and a reflector 140.

Since the image output apparatus 120 is substantially the same as the image output apparatus 20 of the previous embodiment, a detailed description thereof will be omitted.

The optical module 130 may be provided on one side of the image output apparatus 120.

The light output from the image output device 120 may be incident through the incident surface 131 of the optical module 130.

A reflective surface 132 may be provided on one side of the optical module 130. The light incident through the incident surface 131 may be totally reflected by the reflecting surface 132.

The reflector 140 may be provided on one surface 133 of the optical module 130. The reflector 140 may be attached to one surface 133 of the optical module 130.

The reflective portion 140 may be formed by coating a surface of the optical module 130.

One side 133 of the optical module 130 may be curved so that the reflective part 140 may function as a concave mirror.

The reflective portion 140 may be formed to face the reflective surface 132. Accordingly, the light totally reflected by the reflective surface 132 can be directed toward the reflective portion 140 side.

The light reflected from the reflective surface 132 to the reflective portion 140 may be reflected by the reflective portion 140 and then directed toward the reflective surface 132. [

The light reflected by the reflective portion 140 may be emitted to the outside of the optical module 130 through the reflective surface 132. That is, the reflecting surface 132 can perform both the function as a total reflection surface and the function as an emission surface.

Light emitted through the reflecting surface 132 may be projected onto the windshield 5. [ Accordingly, the user can confirm the image output from the image output apparatus 120. [

FIG. 4 is a diagram illustrating a schematic configuration of a head-up display apparatus according to a third embodiment of the present invention.

Referring to FIG. 4, the head-up display device 200 according to the third embodiment of the present invention includes an image output device 220 and a reflector 240.

The image output apparatus 220 outputs driving information as an image, and the reflector 240 receives the image output from the image output apparatus 220 and projects the image to the windshield 5.

The image output device 220 may include a curved display panel.

If the image output device 220 uses a flat display panel, the image projected onto the windshield 5 may be distorted unless an optical path of a sufficient distance is ensured.

However, when the image output apparatus 220 uses the curved display panel as in the present embodiment, it is possible to improve the distortion of the image projected onto the windshield 5 even if the length of the optical path is relatively short .

Therefore, when the image output apparatus 220 uses a curved display panel, it is possible to reduce the volume of the head-up display apparatus 200 as compared with the case of using the flat display panel.

FIG. 5 is a diagram illustrating a schematic configuration of a head-up display device according to a fourth embodiment of the present invention.

Referring to FIG. 5, a head-up display device 300 according to a fourth embodiment of the present invention includes an image output device 320 and a reflector 340.

The image output apparatus 320 outputs driving information as an image, and the reflection unit 340 can receive the image output from the image output apparatus 320 and project the image to the windshield 5. [

The image output apparatus 320 may include a laser scanner.

Even if the length of the optical path between the image output apparatus 320 and the reflection unit 340 is relatively short when the image output apparatus 320 uses the laser scanner, The distortion phenomenon can be corrected.

In other words, the head-up display device 300 according to the present embodiment uses the characteristics of the laser scanner itself to increase the length of the optical path between the image output device 320 and the reflection part 340, It is possible to prevent the distortion of the image projected on the projection optical system 5.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

5: Windshield 10: Head-up display device
20: Image output device 30: Optical module
40:

Claims (9)

An image output device for outputting an image;
An optical module placed in front of the image output device and providing an optical path of light output from the image output device; And
And a reflector for receiving an image output from the image output apparatus and projecting the image onto a windshield,
Wherein the optical module includes an incident surface on which the light output from the image output device is incident and a reflecting surface that totally reflects the light incident on the incident surface.
The method according to claim 1,
Wherein the optical module includes an optical waveguide (Light guide).
The method according to claim 1,
And an exit surface through which light reflected by the reflecting surface is emitted.
The method of claim 3,
And the exit surface is formed so as to face the reflecting portion such that light emitted from the exit surface faces the reflecting portion.
The method according to claim 1,
Wherein the reflective portion is attached to one surface of the optical module.
6. The method of claim 5,
Wherein the reflective surface and the reflective portion are disposed so as to face each other such that the light totally reflected by the reflective surface faces the reflective portion.
The method according to claim 6,
Wherein the reflecting surface is arranged to face the windshield such that light reflected by the reflecting portion is emitted through the reflecting surface and directed to the windshield.
6. The method of claim 5,
And the reflective portion is coated on one surface of the optical module.
The method according to claim 1,
Wherein the reflective portion includes a concave mirror.
KR1020150099589A 2015-07-14 2015-07-14 Head up display KR20170008431A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150099589A KR20170008431A (en) 2015-07-14 2015-07-14 Head up display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150099589A KR20170008431A (en) 2015-07-14 2015-07-14 Head up display

Publications (1)

Publication Number Publication Date
KR20170008431A true KR20170008431A (en) 2017-01-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150099589A KR20170008431A (en) 2015-07-14 2015-07-14 Head up display

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019106233A1 (en) * 2017-11-28 2019-06-06 Dispelix Oy Head-up display

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019106233A1 (en) * 2017-11-28 2019-06-06 Dispelix Oy Head-up display
CN111386487A (en) * 2017-11-28 2020-07-07 迪斯帕列斯有限公司 Head-up display
US11487112B2 (en) 2017-11-28 2022-11-01 Dispelix Oy Head-up display

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