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US 8,867,117 B2Granted
Single-layer reflective display utilizing luminescence
AssigneeHewlett-Packard Development Company, L.P.
InventorsGary Gibson, Stephen Kitson, Tim Taphouse
Life of this patent
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Abstract
A reflective display device has multiple display pixels. Each pixel has at least three color sub-pixels disposed side-by-side for three primary colors respectively. At least one color sub-pixel has a light shutter with adjustable transmission, a luminescent layer containing a luminescent material that emits light of a selected color, and a mirror for reflecting light corresponding to that selected color.
Claims20
A reflective display pixel comprising:
- at least three sub-pixels disposed side-by-side, each of the sub-pixels corresponding to one of three primary colors, at least one of the sub-pixels having:
- a light shutter with adjustable transmission;
- a luminescent layer disposed below the light shutter and containing a luminescent material that emits light of a selected primary color when illuminated by light received from the light shutter;
- and
- a mirror disposed below the luminescent layer to reflect light corresponding to the selected primary color emitted by the luminescent layer, the light being reflected in a direction toward the light shutter to pass through the luminescent layer,
- wherein the luminescent layer is sandwiched between the light shutter and the mirror.
3 more elements
A reflective display device comprising:
- a plurality of pixels, each pixel having at least three sub-pixels disposed side-by-side, each of the sub-pixels corresponding to one of three primary colors, at least one of the sub-pixels having:
- a light shutter with adjustable transmission;
- a luminescent layer disposed below the light shutter and containing a luminescent material that emits light of a selected primary color;
- and
- a mirror disposed below the luminescent layer for reflecting light corresponding to the selected primary color.
2 more elements
A reflective pixel comprising:
- a shutter layer adjacent to a first side of the reflective pixel, the shutter layer comprising an electro-optic shutter to modulate an intensity of light passing through the shutter layer;
- a luminescent layer disposed below the shutter layer, the luminescent layer comprising a luminescent material to emit light of a selected color when illuminated by light received from the shutter layer;
- and
- a reflective layer disposed below the luminescent layer and adjacent to a second side of the reflective pixel opposite the first side;
- the reflective layer comprising a mirror to reflect light emitted by the luminescent layer, the light being reflected in a direction away from the second side and toward the first side of the reflective pixel.
2 more elements
Dependencies are inferred from the claim text.