Head-up display device for vehicles

• US 7,688,516 B2
• Filed: 05/06/2008
• Issued: 03/30/2010
• Est. Priority Date: 05/11/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ahn, Tea Jeong, Choi, Ho Young, Lee, Sang Keun
• Primary Examiner(s): Harrington; Alicia M
• Application Number:
  US12/115,924
• Publication Number:
  US 20080278822A1
• Time in Patent Office: 693 Days
• Field of Search: 359629-634, 345 7- 9
• US Class Current: 359/631
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence

Abstract

Disclosed is a head-up display device for vehicles. The display device for vehicles includes a panel, on which driving data of a vehicle are displayed; and an aspheric combiner, which magnifies the driving data displayed on the panel and thus creates a virtual image, and has a ratio of DISC to CRC satisfying the below expression (here, 0<|DISC/CRC|<1.0, DISC representing the distance on an optical route between the panel and the combiner, and CRC representing the radius of curvature of the combiner).

Claims

1. A display device comprising:

a panel, on which image data are displayed; and

a combiner, that magnifies and reflects the image data displayed on the panel, and that has a ratio of DISC to CRC satisfying the below expression 1 and that has a ratio of CRC to DISV satisfying the below expression 2,

wherein the expression 1 is 0<

|CRC|<

1, where DISC represents a distance on an optical route between the panel and the combiner, and CRC represents a radius of curvature of the combiner,

wherein the expression 2 is 0.01<

|CRC/DISV|<

0.5, where CRC represents the radius of curvature of the combiner, and DISV represents a distance between an observer and a virtual image creating position.

2. The display device according to claim 1, wherein the combiner is an aspheric combiner.

3. The display device according to claim 1, wherein the combiner creates a virtual image corresponding to the image data displayed on the panel.

4. The display device according to claim 1, wherein a resolution of the panel differs from a resolution of the image data.

5. The display device according to claim 4, wherein the resolution of the panel is higher than the resolution of the image data.

6. The display device according to claim 5, wherein the image data has the resolution of 640×

480 of a Video Graphics Array (VGA) grade, and the panel has the resolution of 800×

600 of a Super Video Graphics Array (SVGA) grade or more.

7. A display device for vehicles comprising:

a panel, on which driving data of a vehicle are displayed; and

an aspheric combiner that magnifies the driving data displayed on the panel and creates a virtual image, and that has a ratio of DISC to CRC satisfying the below expression 1 and that has a ratio of CRC to DISV satisfying the below expression 2,

wherein the expression 1 is 0<

|DISC/CRC|<

1.0, where DISC represents a distance on an optical route between the panel and the combiner, and CRC represents a radius of curvature of the combiner,

wherein the expression 2 is 0.01<

|CRC/DISV|<

0.5, where CRC represents the radius of curvature of the combiner, and DISV represents a distance between an observer and a virtual image creating position.

8. The display device for vehicles according to claim 7, wherein the virtual image is projected by the aspheric combiner, and is created outside of the vehicle through a wind shield of the vehicle.

9. The display device for vehicles according to claim 7, wherein the virtual image is created outside of the vehicle by regulating positions of the panel and the aspheric combiner.

10. The display device for vehicles according to claim 7, wherein the panel displays a moving picture.

11. The display device for vehicles according to claim 7, further comprising:

at least one first optical element provided between the panel and the aspheric combiner,

wherein the at least one first optical element refracts or reflects the driving data displayed on the panel and thus changes a traveling route of the driving data.

12. The display device for vehicles according to claim 7, further comprising a second optical element changing a traveling route of the virtual image projected by the aspheric combiner.

13. The display device for vehicles according to claim 7, wherein the virtual image is created at a position of 1 to 5 meters ahead of a driver.

14. A head-up display device for vehicles comprising:

a panel displaying driving image data of a vehicle;

a lens magnifying and projecting the driving image data displayed on the panel; and

a mirror projecting the magnified and projected driving image data to a driver and creating a virtual image,

wherein the panel has a resolution differing from the resolution of the driving image data, and

wherein the mirror has a ratio of CRC to DISV satisfying the below expression,

wherein the expression is 0.01<

|CRC/DISV|<

0.5, where CRC represents a radius of curvature of the mirror, and DISV represents a distance between an observer and a virtual image creating position.

15. The head-up display device for vehicles according to claim 14, wherein the panel displays the driving image data having a resolution lower than its own resolution.

16. The head-up display device for vehicles according to claim 15, wherein:

the driving image data has the resolution of 640×

480 of a Video Graphics Array (VGA) grade; and

the panel has the resolution of 800×

600 of a Super Video Graphics Array (SVGA) grade or greater.

17. The head-up display device for vehicles according to claim 14, wherein the mirror is an aspheric combiner.

18. The head-up display device for vehicles according to claim 14, wherein the virtual image is created outside of the vehicle through a wind shield of the vehicle.