Backlight using reversely mounted LEDs
AssigneeWorld Properties, Inc.
InventorsWilliam Coghlan, Mark Seelhammer, Edward Kinnally
Life of this patent
Estimating the term…
Abstract
A display is back lit by reflection of light from at least one point source of light, such as an LED. The reflecting surface can be far, near, or a coating on a package containing the point source of light. The point source of light faces rearwardly, i.e. emitting light away from a viewer, obscuring the source without creating an easily perceptible shadow.
Claims19
In a display including at least one backlit area, the improvement comprising;
- a diffusely reflecting surface;
- at least one reversely mounted point source of light illuminating said surface, whereby light reflected from said surface back lights said at least one area without glare.
In a display including at least one backlit area, the improvement comprising;
- a diffusely reflecting surface;
- at least one reversely mounted light emitting diode illuminating said surface, whereby light reflected from said surface back lights said at least one area without glare.
In a display including a flex circuit having at least one backlit area, the improvement comprising;
- at least one light emitting diode on said flex circuit and emitting light in a first direction away from said flex circuit;
- a diffusely reflecting shell enclosing said light emitting diode and said area on said flex circuit, said shell diffusely reflecting light in directions generally opposite said first direction;
- whereby light reflected from said shell back lights said at least one area substantially uniformly.
In a display including a flex circuit having a plurality of backlit areas, wherein at least one of said areas is backlit by an EL lamp, the improvement comprising;
- at least one light emitting diode on said flex circuit and emitting light in a first direction away from said flex circuit;
- a diffusely reflecting shell enclosing said light emitting diode and another of said areas on said flex circuit, said shell diffusely reflecting light in directions generally opposite said first direction;
- whereby light reflected from said shell back lights said another area substantially uniformly.
Dependencies are inferred from the claim text.