EP-4737988-A1 - FLOATING DISPLAY DEVICE FOR VEHICLE

Abstract

A floating display device for a vehicle is disclosed. The floating display device for a vehicle, according to an embodiment of the present disclosure, includes an image generating device configured to output a projected image; and a mirror configured to reflect the projected image from the image generating device and output a floating image based on inverted real image, in which the mirror includes an anamorphic mirror or an anamorphic Fresnel concave mirror. Accordingly, it is possible to reduce the size of the floating display device for the vehicle while implementing a projection image on a large screen.

Inventors

• CHOI, Dongjune
• SHIN, HYUNKWON
• Choi, Seungyul
• CHUNG, Jihyouk

Assignees

• LG Electronics Inc.

Dates

Publication Date

20260506

Application Date

20230719

Claims (16)

1. A floating display device for vehicle comprising: an image generating device configured to output a projected image; and a mirror configured to reflect the projected image from the image generating device and output a floating image based on inverted real image, wherein the mirror comprises an anamorphic mirror or an anamorphic Fresnel concave mirror.
2. The floating display device for vehicle of claim 1, wherein the anamorphic mirror or the anamorphic Fresnel concave mirror has a different focal length on a first axis and a second axis.
3. The floating display device for vehicle of claim 1, wherein a distance between the image generating device and the mirror is greater than a focal length of the mirror.
4. The floating display device for vehicle of claim 1, further comprising at least one of a phase delay plate, a half mirror, or a reflective polarizing mirror disposed between the image generating device and the mirror.
5. The floating display device for vehicle of claim 1, further comprising a second mirror configured to reflect a projected image from the image generating device, wherein the mirror is configured to reflect the projected image from the second mirror and output the floating image based on inverted real image.
6. The floating display device for vehicle of claim 5, wherein a sum of a distance between the image generating device and the second mirror and a distance between the second mirror and the mirror is greater than a focal length of the mirror.
7. The floating display device for vehicle of claim 5, wherein a distance between the image generating device and the second mirror is greater than a distance between the second mirror and the mirror.
8. The floating display device for vehicle of claim 5, wherein the floating image reflected from the mirror is reflected to a windshield of vehicle and output to a predetermined area.
9. A floating display device for vehicle comprising: an image generating device configured to output a projected image; and a mirror configured to reflect the projected image from the image generating device and output a floating image based on inverted real image, wherein the mirror comprises a Fresnel concave mirror having a pitch of 0.3 mm to 0.5 mm or a Fresnel concave mirror having a curved reflective surface.
10. The floating display device for vehicle of claim 9, further comprising a second mirror configured to reflect the projected image from the image generating device, wherein the mirror is configured to reflect the projected image from the second mirror and output the floating image based on inverted real image.
11. A floating display device for vehicle comprising: an image generating device configured to output a projected image; a half mirror configured to reflect the projected image from the image generating device; and a first mirror and a second mirror spaced apart from each other, and configured to reflect a projected image from the half mirror, respectively, and output a first floating image and a second floating image based on an inverted real image, respectively, respectively, wherein the half mirror is configured to transmit the first floating image and the second floating image.
12. The floating display device for vehicle of claim 11, wherein the first mirror and the second mirror comprise an anamorphic mirror or an anamorphic Fresnel concave mirror having a different focal length on a first axis and a second axis.
13. The floating display device for vehicle of claim 11, wherein the first mirror and the second mirror comprise a Fresnel concave mirror having a pitch of 0.3 mm to 0.5 mm or a Fresnel concave mirror having a curved reflective surface.
14. A floating display device for vehicle comprising: an image generating device configured to output a projected image; a first folding mirror and a second folding mirror spaced apart from each other, and configured to reflect the projected image from the image generating device respectively; and a mirror configured to reflect the projected image from the first folding mirror and the second folding mirror, respectively, and output a first floating image and a second floating image based on an inverted real image, respectively.
15. The floating display device for vehicle of claim 14, wherein the mirror comprises an anamorphic mirror or an anamorphic Fresnel concave mirror having a different focal length on a first axis and a second axis.
16. The floating display device for vehicle of claim 14, wherein the mirrors comprises a Fresnel concave mirror having a pitch of 0.3 mm to 0.5 mm or a Fresnel concave mirror having a curved reflective surface.

Description

BACKGROUND 1. Technical Field This disclosure relates to a floating display device for vehicle, and more particularly, to a floating display device for vehicle capable of reducing fatigue caused by binocular disparity while implementing a clear floating image on a large screen. 2. Description of the Related Art A vehicle is an apparatus that moves in the direction desired by a user riding in it. A representative example is an automobile. Meanwhile, a floating display device for vehicle is installed inside the vehicle, for the convenience of a user using the vehicle. For example, a display is placed on a cluster, etc., to display various types of information. Meanwhile, in order to display vehicle driving information, etc., separately from the cluster, various displays, such as an Audio Video Navigation (AVN) display and a head-up display configured to output a projected image on a windshield, has been installed in a vehicle. Meanwhile, prior art U.S. Patent No. US 5,087,116 discloses a method for outputting a floating image using a Fresnel mirror and a conventional mirror. However, according to the Fresnel mirror described in the prior art, aberrations occur and an extended focal length is formed, so that clarity is poor. Furthermore, binocular disparity increases depending on the viewing position, thereby causing fatigue. SUMMARY The disclosure has been made in view of the above problems, and can provide a floating display device for vehicle capable of reducing fatigue caused by binocular disparity while implementing a clear floating image on a large screen. The disclosure can further provide a floating display device for vehicle capable of reducing a size while implementing a clear floating image on a large screen. In accordance with an aspect of the present disclosure, a floating display device for vehicle includes: an image generating device configured to output a projected image; and a mirror configured to reflect the projected image from the image generating device and output a floating image based on inverted real image, in which the mirror includes an anamorphic mirror or an anamorphic Fresnel concave mirror. Meanwhile, the anamorphic mirror or the anamorphic Fresnel concave mirror can have a different focal length on a first axis and a second axis. Meanwhile, a distance between the image generating device and the mirror can be greater than a focal length of the mirror. Meanwhile, the floating display device for vehicle according to an aspect of the present disclosure can further include at least one of a phase delay plate, a half mirror, or a reflective polarizing mirror disposed between the image generating device and the mirror. Meanwhile, the floating display device for vehicle according to an aspect of the present disclosure can further include a second mirror configured to reflect a projected image from the image generating device, in which the mirror is configured to reflect the projected image from the second mirror and output the floating image based on inverted real image. Meanwhile, a sum of a distance between the image generating device and the second mirror and a distance between the second mirror and the mirror can be greater than a focal length of the mirror. Meanwhile, a distance between the image generating device and the second mirror can be greater than a distance between the second mirror and the mirror. Meanwhile, the floating image reflected from the mirror can be reflected to a windshield of vehicle and output to a predetermined area. Meanwhile, in accordance with another aspect of the present disclosure, a floating display device for vehicle includes: an image generating device configured to output a projected image; and a mirror configured to reflect the projected image from the image generating device and output a floating image based on inverted real image, in which the mirror includes a Fresnel concave mirror having a pitch of 0.3 mm to 0.5 mm or a Fresnel concave mirror having a curved reflective surface. Meanwhile, the floating display device for vehicle according to an aspect of the present disclosure can further include a second mirror configured to reflect the projected image from the image generating device, in which the mirror is configured to reflect the projected image from the second mirror and output the floating image based on inverted real image. Meanwhile, in accordance with another aspect of the present disclosure, a floating display device for vehicle includes: an image generating device configured to output a projected image; a half mirror configured to reflect the projected image from the image generating device; and a first mirror and a second mirror spaced apart from each other, and configured to reflect a projected image from the half mirror, respectively, and output a first floating image and a second floating image based on an inverted real image, respectively, respectively, in which the half mirror is configured to transmit the first floating image