Heads up display system
AssigneeGentex Corporation
InventorsDavid J. Cammenga, William L. Tonar, David L. Poll
Life of this patent
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Abstract
A heads up display system of a vehicle including a combiner screen having a first substantially transparent substrate defining a first surface and a second surface, a second substantially transparent substrate defining a third surface and a fourth surface. A primary seal is disposed between the first and second substrates. The seal and the first and second substrates define a cavity therebetween. An electro-optic material is positioned within the cavity and a reflective polarizer is positioned on one of the first and second surfaces. A projector projects light having a first polarization toward the first surface of the first substrate.
Claims17
A heads up display system of a vehicle, comprising:
- a combiner screen comprising:
- a first substantially transparent substrate defining a first surface and a second surface;
- a second substantially transparent substrate defining a third surface and a fourth surface;
- a primary seal disposed between the first and second substrates, wherein the seal and the first and second substrates define a cavity therebetween;
- an electro-optic material positioned within the cavity;
- and
- a reflective polarizer positioned on one of the first and second surfaces, wherein the reflective polarizer comprises a wire grid polarizer and is positioned on the second surface of the first substrate and is electrically connected to the electro-optic material;
- and
- a projector for projecting light having a first polarization toward the first surface of the first substrate.
A combiner screen for a heads up display, comprising:
- at least two substantially transparent substrates positioned in a spaced apart configuration;
- an electro-optic material positioned between the at least two substantially transparent substrates;
- a reflective polarizer positioned between the electro-optic material and at least one of the substrates, wherein the reflective polarizer is electrically coupled to the electro-optic material;
- and
- an electrically conductive layer, wherein the reflective polarizer and the electrically conductive layer are positioned on opposite sides of the electro-optic material.
A heads up display system of a vehicle, comprising:
- a projector for projecting light of a first polarization;
- and
- a combiner screen positioned away from a vehicle windshield comprising:
- a substantially transparent substrate defining a first surface and a second surface, wherein the substrate is curved along at least two axes;
- and
- a reflective polarizer positioned on the second surface of the substantially transparent substrate, wherein the combiner screen has a reflectance of the first polarization of light greater than about 40%.
Dependencies are inferred from the claim text.