Solar load managing head-up display system and device

Patent metadata

Field	Value
Publication number	US-10114217-B2
Application number	US-201715440108-A
Country	US
Kind code	B2
Filing date	Feb 23, 2017
Priority date	Feb 23, 2017
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A head-up display system includes a housing, a liquid crystal display disposed within the housing and configured for emitting a first ray of light, and a reflector stack disposed adjacent the liquid crystal display within the housing. The reflector stack is configured for transmitting therethrough the first ray of light and includes a retardation plate and an optical film disposed on the retardation plate and facing the liquid crystal display. The head-up display system also includes a radiative heat sink disposed on the housing and a turn mirror spaced apart from the reflector stack. The turn mirror is configured for directing a first solar ray to the reflector stack such that the first solar ray reflects off the reflector stack to the radiative heat sink as a second solar ray.

First claim

What is claimed is:

1. A head-up display system comprising:
a housing;
a liquid crystal display disposed within the housing and configured for emitting a first ray of light;
a reflector stack disposed adjacent the liquid crystal display within the housing, wherein the reflector stack is configured for transmitting therethrough the first ray of light and includes:
a retardation plate; and
an optical film disposed on the retardation plate and facing the liquid crystal display;

a radiative heat sink disposed on the housing; and
a turn mirror spaced apart from the reflector stack and configured for directing a first solar ray to the reflector stack such that the first solar ray reflects off the reflector stack to the radiative heat sink as a second solar ray.

2. The head-up display system of claim 1 , wherein the optical film abuts the liquid crystal display such that the liquid crystal display and the reflector stack do not define an air gap therebetween.

3. The head-up display system of claim 2 , wherein the optical film is a reflective polarizer film.

4. The head-up display system of claim 1 , wherein the radiative heat sink absorbs the second solar ray such that the turn mirror reflects only the first solar ray and the first ray of light.

5. The head-up display system of claim 1 , wherein the radiative heat sink is formed from a plurality of carbon nanotubes each extending from the housing and aligned parallel to one another.

6. The head-up display system of claim 1 , wherein the second solar ray does not reflect off the turn mirror.

7. A head-up display system comprising:
a housing;
a liquid crystal display disposed within the housing and configured for emitting a first ray of light;
a reflector stack disposed adjacent the liquid crystal display within the housing, wherein the reflector stack is spaced apart from the liquid crystal display to define an air gap therebetween;
wherein the reflector stack is configured for transmitting therethrough the first ray of light and includes:
a retardation plate; and
an optical film disposed on the retardation plate and facing the liquid crystal display;

a squelching material disposed within the air gap;
a radiative heat sink disposed on the housing; and
a turn mirror spaced apart from the reflector stack and configured for directing:
a first solar ray to the reflector stack such that the first solar ray reflects off the reflector stack to the radiative heat sink as a second solar ray; and
a third solar ray through the reflector stack to the squelching material such that the third solar ray reflects off the squelching material to the radiative heat sink as a fourth solar ray.

8. The head-up display system of claim 7 , wherein the optical film is a reflective polarizer film.

9. The head-up display system of claim 7 , wherein the optical film is a linear polarizer.

10. The head-up display system of claim 7 , wherein the squelching material is an index matching gel.

11. The head-up display system of claim 7 , wherein the liquid crystal display has a first surface facing the reflector stack and configured for emitting the first ray of light, and wherein the squelching material is disposed on the first surface and the optical film.

12. The head-up display system of claim 11 , wherein the squelching material is a cured film formed from an anti-reflection coating composition.

13. The head-up display system of claim 12 , wherein the cured film has a thickness of from 35 μm to 65 μm and has a moth-eye structure including a plurality of peaks and a plurality of troughs defined between adjacent ones of the plurality of peaks; and
further wherein the cured film is configured for minimizing reflection of the first ray of light from the first surface.

14. A device comprising;
a windshield;
an operator eyebox spaced apart from the windshield; and
a head-up display system configured for producing only a primary image visible at the windshield when viewed from the operator eyebox without producing a ghost image offset from the primary image, the head-up display system including:
a housing;
a liquid crystal display disposed within the housing and configured for emitting a first ray of light;
a reflector stack disposed adjacent the liquid crystal display within the housing, wherein the reflector stack is configured for transmitting therethrough the first ray of light and includes:
a retardation plate; and
an optical film disposed on the retardation plate and facing the liquid crystal display;

a radiative heat sink disposed on the housing; and
a turn mirror spaced apart from the reflector stack and configured for directing a first solar ray to the reflector stack such that the first solar ray reflects off the reflector stack to the radiative heat sink as a second solar ray.

15. The device of claim 14 , wherein the second solar ray does not reflect off the turn mirror.

16. The device of claim 14 , wherein the second solar ray does not reflect off the radiative heat sink to the operator eyebox.

17. The device of claim 14 , wherein the device has a lowest surface and the operator eyebox has a top and a bottom disposed between the top and the lowest surface, and further wherein the second solar ray is not visible at the windshield when viewed from the top of the operator eyebox.

18. The device of claim 14 , wherein the optical film abuts the liquid crystal display such that the liquid crystal display and the reflector stack do not define an air gap therebetween.

19. The device of claim 14 , wherein the reflector stack is spaced apart from the liquid crystal display to define an air gap therebetween.

20. The device of claim 19 , wherein the head-up display system further includes a squelching material disposed within the air gap.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Seder Thomas A
• Ferris Leslie G
• Carpenter James A

Classifications

• G02B1/118

  having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures · CPC title

• G02B2027/012

  comprising devices for attenuating parasitic image effects · CPC title

• G02F1/133536

  Reflective polarizers (G02F1/13362 takes precedence) · CPC title

• G02B27/0101 Primary

  characterised by optical features (G02B27/0172 takes precedence) · CPC title

• G02F1/13363

  Birefringent elements, e.g. for optical compensation · CPC title