Backlight using reversely mounted LEDs
First Claim
Patent Images
1. 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.
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Accused Products
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.
18 Citations
19 Claims
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1. In a display including at least one backlit area, the improvement comprising;
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In a display including at least one backlit area, the improvement comprising;
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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. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. In a display including a flex circuit having at least one backlit area, the improvement comprising;
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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.
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19. 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;
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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.
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Specification