US 12,601,908 B2 · Heads-up display with ghost image mitigation

Abstract

A heads-up display for viewing by an eye of a passenger of a vehicle includes a windshield with a reflective polarizer disposed adjacent to a first outermost glass surface of the windshield, a display configured to emit an image toward the windshield, the windshield reflecting between 15% and 85% of the emitted image toward the passenger, and a phase retarding plate disposed in an optical path between the display and the windshield. The windshield is configured to receive the image emitted by the display after the image has been transmitted by the phase retarding plate and to reflect at least a portion of the received image as a reflected image toward the eye of the passenger. The phase retarding plate modifies a polarization state of the reflected image to improve a viewing characteristic of the reflective image depending on a viewing angle of the eye of the passenger.

Claims19

Dependent claims

A heads-up display for viewing by an eye of a passenger of a vehicle, comprising:

a windshield comprising a reflective polarizer disposed adjacent to a first outermost glass surface of the windshield;
a display configured to emit an image toward the windshield, the windshield reflecting between 15% and 85% of the emitted image toward the passenger;
and
a phase retarding plate disposed in an optical path between the display and the windshield;
the windshield configured to receive the image emitted by the display after being transmitted by the phase retarding plate and to reflect at least a portion of the received image as a reflected image toward the eye of the passenger, the phase retarding plate changing a polarization type of the reflected image to improve a viewing characteristic of the reflective image depending on a viewing angle of the eye of the passenger, wherein the phase retarding plate is disposed in a plane substantially parallel to the display and rotating the phase retarding plate within the plane changes the viewing characteristic of the reflected image.

2 more elements

A display system for viewing by first and second eyes of respective first and second passengers of a vehicle along different respective first and second directions, the display system comprising:

a display configured to form a polarized image for viewing by the first and second eyes, the formed polarized image having a first polarization state;
a windshield comprising a reflective polarizer configured to receive the formed polarized image at a first incident angle and reflect between about 10% to about 60% of the received polarized image along the first and second directions as respective first and second reflected polarized images for viewing by the respective first and second eyes, the first and second reflected polarized images having respective first and second average intensities, the reflective polarizer configured to transmit at least 60% of an incident light having a wavelength comprised by the received polarized image and having a second polarization state orthogonal to the first polarization state;
and
a retarder disposed in an optical path between the display and the windshield and configured to have its orientation relative to the reflective polarizer changed, the change modifying one of the first and second average intensities by more than 20% and modifying the other one of the first and second average intensities by less than 20%.

1 more element

Dependencies are inferred from the claim text.

Heads-up display with ghost image mitigation

Life of this patent

Heads-up display with ghost image mitigation

Life of this patent

Abstract

Claims19