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US 9,039,266 B2Granted
Reflective color display with backlighting
AssigneeHewlett-Packard Development Company, L.P.
InventorGary Gibson
Life of this patent
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Abstract
A reflective color pixel has a top surface for receiving ambient light for front lighting, a plurality of sub-pixels including a first sub-pixel, and a waveguide disposed underneath the sub-pixels for transmitting light for backlighting to the sub-pixels. The first sub-pixel includes a first luminescent material configured to absorb either the ambient light or the light for backlighting and generate light of a first color.
Claims15
A reflective color display pixel comprising:
- a top surface for receiving ambient light for front lighting;
- a plurality of sub-pixels including a first sub-pixel;
- and
- a waveguide disposed underneath the sub-pixels for transmitting light for backlighting to the sub-pixels;
- wherein the first sub-pixel includes a first luminescent material configured to absorb the ambient light and the light for backlighting and generate light of a first color from the absorbed ambient light and the absorbed light for backlighting.
2 more elements
A reflective color display comprising:
- a plurality of pixels, each pixel having a top surface for receiving ambient light for front lighting and a first sub-pixel for generating a first color, the first sub-pixel containing a first luminescent material for converting ambient light received by the pixel into light of the first color;
- a waveguide disposed underneath the pixels;
- and
- a light source generating light for backlighting the pixels, the light source being optically coupled to the waveguide for injecting the light for backlighting into the waveguide, the waveguide being configured to transmit the light for backlighting into the first sub-pixel for absorption by the first luminescent material to generate light of the first color.
1 more element
Dependencies are inferred from the claim text.