Head-up display apparatus

• US 9,678,341 B2
• Filed: 09/03/2014
• Issued: 06/13/2017
• Est. Priority Date: 02/07/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Dongwook, Ku, Minseok, Lee, Kyoung Ii, Lee, Dong Ha
• Primary Examiner(s): Chwasz, Jade R
• Application Number:
  US14/476,318
• Publication Number:
  US 20150226965A1
• Time in Patent Office: 1,014 Days
• Field of Search: 359463, 359464, 359465, 359466, 359467, 359477, 359 13, 359 14
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 2027/0141 characterised by the informative content of the display
• CPC Class Codes: G02B 27/01 Head-up displays
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• CPC Class Codes: G02B 27/283 used for beam splitting or combining
• CPC Class Codes: G02B 30/27 involving lenticular arrays
• CPC Class Codes: G02B 30/30 involving parallax barriers

Abstract

A head-up display (HUD) apparatus and a method of using the HUD apparatus are described. The HUD apparatus includes a first optical module configured to display a two dimensional (2D) image, a second optical module configured to display a three dimensional (3D) image and arranged at a predetermined angle relative to the first optical module, a separation module arranged on an optical path of the first and second optical modules to reflect a light of the first optical module and to project a light from the second optical module, and an optical system configured to output the light having passed the separation module.

Claims

1. A head-up display (HUD) apparatus, the HUD apparatus comprising:

a first optical module configured to display a two dimensional (2D) image;

a second optical module configured to display a three dimensional (3D) image and arranged at a predetermined angle relative to the first optical module;

a separation module arranged on an optical path of the first and second optical modules to reflect a light of the first optical module and to project a light from the second optical module; and

an optical system configured to output the light having passed the separation module,

wherein the first optical module includes a 2D display panel and a first backlight unit configured to provide a first information as the two dimensional image, and the second optical module includes a 3D display panel and a second backlight unit configured to provide a second information as the three dimensional image,

wherein the second backlight unit uses one of a lenticular method and a parallax barrier method to provide the three dimensional image,

wherein the first information includes text and figurative information, and the second information includes three dimensional figure information,

wherein the second optical module is configured to output augmented reality to provide information of surrounding environments in a driver'"'"'s view,

wherein an amount of information outputted on the augmented reality is decreased along with an increase of vehicle speed,

wherein a position of a virtual screen formed by the HUD is changed to correspond with a focused position of gaze,

wherein a depth of a 3D screen on the virtual screen formed by the HUD is changed based on travel speed or road type so that a depth of the 3D screen during highway travel is deeper than a depth of the 3D screen during in-city travel, and

wherein the augmented reality formed by the second optical module is formed as the 3D screen so that a depth of the augmented reality is changed.

2. The HUD apparatus of claim 1, wherein the separation module is a polarizing beam splitter (PBS) configured to filter a polarization direction of light from the first and second optical modules.

3. The HUD apparatus of claim 1, wherein the first and second optical modules are perpendicularly arranged to each other.

4. The HUD apparatus of claim 1, wherein the first and second optical modules are selectively operated.

5. The HUD apparatus of claim 1, wherein the first and second optical modules are simultaneously operated.

6. The HUD apparatus of claim 1, wherein a position of the virtual screen formed by the second optical module is changed by vehicle speed and travel environment information.

7. The HUD apparatus of claim 6, wherein focus of position of the virtual screen is set on a far distance to match a view field of a driver when a vehicle travels at a high speed, and the virtual screen is moved to a near distance of the view field of a driver when a vehicle travels at a slow speed.

8. The HUD apparatus of claim 1, wherein the separation module includes a reflective prism using a total reflection and projection of light from the first and second optical modules, and the light of the first and second optical modules is transmitted without loss using an inner total reflection and projection of light from the reflective prism.

9. The HUD apparatus of claim 1, wherein a size of an output screen of the second optical module is controlled in association with vehicle speed.

10. The HUD apparatus of claim 9, wherein the size of the output screen of the second optical module is increased to a maximum when a vehicle is in a stationary state, and decreased to a minimum when a vehicle is in a travel state.

11. The HUD apparatus of claim 9, wherein brightness of the first and second optical modules is variably controlled in response to vehicle speed.

12. The HUD apparatus of claim 11, wherein brightness of the first and second optical modules is brightest when a vehicle is in a stationary state, and darkest when a vehicle is in a travel state.

13. A method of using a head-up display (HUD) apparatus, the method comprising:

displaying a two dimensional (2D) image using a first optical module of the HUD;

displaying a three dimensional (3D) image using a second optical module of the HUD, wherein the second optical module is arranged at a predetermined angle relative to the first optical module;

reflecting a light of the first optical module to a polarization direction by forming the polarization direction of the light of the first optical module at a predetermined level; and

vertically forming the polarization direction of the first and second optical modules by forming the polarization direction of light of the second optical module,

wherein the first optical module includes a 2D display panel and a first backlight unit configured to provide a first information as the two dimensional image, and the second optical module includes a 3D display panel and a second backlight unit configured to provide a second information as the three dimensional image,

wherein the second backlight unit uses one of a lenticular method and a parallax barrier method to provide the three dimensional image,

wherein the first information includes text and figurative information, and the second information includes three dimensional figure information,

wherein the second optical module is configured to output augmented reality to provide information of surrounding environments in a driver'"'"'s view,

wherein an amount of information outputted on the augmented reality is decreased along with an increase of vehicle speed,

wherein a position of a virtual screen formed by the HUD is changed to correspond with a focused position of gaze,

wherein a depth of a 3D screen on the virtual screen formed by the HUD is changed based on travel speed or road type so that a depth of the 3D screen during highway travel is deeper than a depth of the 3D screen during in-city travel, and

wherein the augmented reality formed by the second optical module is formed as the 3D screen so that a depth of the augmented reality is changed.

14. The method of claim 13, wherein a separation module is used to perform the reflecting of the light of the first optical module and the vertically forming of the polarization direction of the first and second optical modules.

15. The method of claim 14, wherein the separation module includes a reflective prism using a total reflection and projection of light from the first and second optical modules, and the light of the first and second optical modules is transmitted without loss using an inner total reflection and projection of light from the reflective prism.

16. The method of claim 14, wherein the separation module is a polarizing beam splitter (PBS) configured to filter the polarization direction of light from the first and second optical modules.