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US 2006/0050532 A1Published application
Illuminating device
AssigneeNanogate Advanced Materials GmbH
InventorMartin Stadtwald-Klenke
Life of this patent
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Abstract
An illuminating device for backlighting flat displays, in particular displays for mobile applications, is provided. The illuminating device includes a light source and a light guiding member into which light emitted from the light source is coupled in and is coupled out therefrom at an exit surface. The exit surface has a surface structure including diffractive surface elements for light propagation, wherein all surface elements have a surface structure with a constant amplitude.
Claims23
An illuminating device for backlighting flat displays comprising
- a light source;
- and
- a light guiding member into which light emitted from the light source is coupled in and is coupled out therefrom at an exit surface, the exit surface having a surface structure including diffractive surface elements for light propagation, wherein the diffractive surface elements have a surface structure with a constant amplitude.
A flat display comprising:
- a liquid crystal element;
- and
- an illuminating device backlighting the liquid crystal element, the illuminating device having a light source and a light guiding member having an exit surface, the exit surface having a surface structure including diffractive surface elements for light propagation, wherein the diffractive surface elements have a surface structure with a constant amplitude.
Dependencies are inferred from the claim text.