Device for backlighting a liquid-crystal display facility for a display and/or control unit, in particular in a household appliance
First Claim
1. A device for backlighting an LCD unit for at least one of a display and a control unit, the device comprising:
- a backlighting layer disposed below an LCD layer of the LCD unit;
at least one backlight source coupled to said backlighting layer;
at least one supplementary backlighting layer disposed below said backlighting layer;
at least one further backlight source coupled to said supplementary backlighting layer, said supplementary backlighting layer allowing light from said at least one further backlight source to be emitted through said backlighting layer and through the LCD layer; and
a cover mask having light-permeable zones and disposed between said backlighting layer and said supplementary backlighting layer, said cover mask defining masked zones and is at least one of formed and printed such that light from said further backlight source can only be emitted according to said light-permeable zones of said cover mask to the LCD layer;
said light-permeable zones of said cover mask defining geometrically separate zones to be lit on the LCD unit by the further backlight source.
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Accused Products
Abstract
The aim is to provide backlighting in a liquid-crystal display unit for a display and/or operator control unit, in particular on a domestic appliance. To achieve this, a backlighting layer, to which at least one backlighting source can be coupled, is located beneath an LCD layer and at least one supplementary backlighting layer is located beneath the backlighting layer. The supplementary layer can be coupled to at least one additional backlighting source assigned to the layers and permits the respective supplementary backlighting layer to emit light from the additional backlighting source(s) in respective defined masked zones through the backlighting layer and through the LCD layer.
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Citations
14 Claims
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1. A device for backlighting an LCD unit for at least one of a display and a control unit, the device comprising:
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a backlighting layer disposed below an LCD layer of the LCD unit; at least one backlight source coupled to said backlighting layer; at least one supplementary backlighting layer disposed below said backlighting layer; at least one further backlight source coupled to said supplementary backlighting layer, said supplementary backlighting layer allowing light from said at least one further backlight source to be emitted through said backlighting layer and through the LCD layer; and a cover mask having light-permeable zones and disposed between said backlighting layer and said supplementary backlighting layer, said cover mask defining masked zones and is at least one of formed and printed such that light from said further backlight source can only be emitted according to said light-permeable zones of said cover mask to the LCD layer; said light-permeable zones of said cover mask defining geometrically separate zones to be lit on the LCD unit by the further backlight source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification