Display backlight for avoiding windshield reflections
AssigneeVisteon Global Technologies, Inc.
InventorsPawel Murzyn, James Arthur Carpenter, Paul Fredrick Luther Weindorf
Life of this patent
Estimating the term…
Abstract
A system for backlighting a display to avoid producing a reflection. The system may include a light source configured for generating a light, a collimated lightguide configured for collimating the light to a collimated light, and a direction changing element configured for directing the collimated light to a vertically narrow light operable to avoid producing reflections.
Claims20
A backlighting system for preventing a display from producing windshield reflections within a vehicle, the windshield reflections resulting from the display emitting an optical signal at a vertical angle greater than a reflection angle, comprising:
- an edge light source configured for generating an edge light;
- a collimated lightguide configured for collimating the edge light to a collimated light;
- and
- a direction changing element statically configured for directing the collimated light to a vertically narrow light having a vertical cutoff angle less than the reflection angle, the vertically narrow light operable with the display to produce the optical signal without the windshield reflections.
A backlighting system for a display, comprising:
- an edge light source configured for generating an edge light;
- a collimated lightguide configured for collimating the edge light to a collimated light;
- and
- a plurality of triangularly shape prisms statically configured for directing the collimated light to a vertically narrow light, the prisms configured to emit the vertically narrow light at a vertical cutoff angle defined relative to a normal of the display.
A vehicle, comprising:
- a windshield;
- a display disposed rearward and below at least a portion of the windshield, the display producing windshield reflections when emitting an optical signal at a vertical angle greater than a reflection angle;
- and
- a backlight system configured for preventing the display from producing the windshield reflections, the backlighting system comprising:
- a collimated lightguide configured for collimating an input light to a collimated light;
- and
- an optically transparent direction changing element configured for statically directing the collimated light to a vertically narrow light having a vertical cutoff angle less than the reflection angle, the vertically narrow light operable with the display to produce the optical signal without the windshield reflections.
Dependencies are inferred from the claim text.