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US 8,132,927 B2Granted
Display device with homogenising attentuating filter
AssigneeKoninklijke Philips Electronics N.V.
InventorsPeter-Andre Redert, Siebe Tjerk De Zwart
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Abstract
A display device includes a display arrangement and an optical attenuator arrangement. The display arrangement has inherent non-uniformity of an output intensity across the display area. The optical attenuator arrangement is positioned in front of the display arrangement and in registration with the display area. The optical attenuator arrangement has a light attenuation characteristic that varies across the display area and is adapted to optically reduce the inherent non-uniformity of the output intensity.
Claims12
A display device comprising:
- a display arrangement having inherent non-uniformity of an output intensity across the display area;
- and
- an optical attenuator arrangement comprising a light attenuation panel positioned in front of the display arrangement and in registration with the display area,
- wherein the optical attenuator arrangement has a light attenuation characteristic that varies across the display area and is adapted to optically reduce the inherent non-uniformity of the output intensity,
- wherein the non-uniformity of the display output intensity is viewing angle dependent, such that a virtual non-uniformity pattern has a position in front of the display plane, and wherein the light attenuation panel is spaced from the display plane at a position corresponding to the position of the virtual non-uniformity pattern.
2 more elements
A display device comprising:
- a display arrangement having inherent non-uniformity of an output intensity across the display area;
- and
- an optical attenuator arrangement positioned in front of the display arrangement and in registration with the display area,
- wherein the optical attenuator arrangement has a light attenuation characteristic that varies across the display area and is adapted to optically reduce the inherent non-uniformity of the output intensity,
- wherein the non-uniformity of the display output intensity is viewing angle dependent, such that a virtual non-uniformity pattern has a position in front of or behind the display plane, and wherein the optical attenuator arrangement comprises a plurality of light attenuation panels together defining a virtual light attenuation pattern at a position corresponding to the position of the virtual non-uniformity pattern.
2 more elements
Dependencies are inferred from the claim text.