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US 2021/0240038 A1Published application
Spatially varying polarizer for display backlight
AssigneeValve Corporation
InventorJoshua Mark Hudman
Life of this patent
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Abstract
Systems and methods for providing a display for an electronic device that includes a liquid crystal display panel assembly, a backlight assembly that includes a light source, and a spatially varying polarizer that provides phase retardation that varies as a function of propagation length away from the light source. The display may also include a linear polarizer and other optical components that improve the efficiency of the backlight assembly, thereby reducing power consumption, cost, space requirements, and provide other advantages.
Claims20
A display, comprising:
- a non-emissive display panel assembly;
- a backlight assembly comprising a light source;
- and
- a spatially varying polarizer positioned between the non-emissive display panel assembly and the backlight assembly, the spatially varying polarizer having a polarization that spatially varies as a function of propagation length away from the light source.
1 more element
A display, comprising:
- a non-emissive display panel assembly;
- a backlight assembly comprising a light guide plate and a light source that provides light to an edge of the light guide plate;
- a reflective polarizer positioned between the non-emissive display panel assembly and the light guide plate;
- and
- a spatially varying polarizer positioned between the reflective polarizer and the light guide plate, the spatially varying polarizer having a polarization that spatially varies as a function of propagation length away from the light source.
2 more elements
Dependencies are inferred from the claim text.