Lighting assembly with multiple lighting units
First Claim
1. A method of illuminating a rectangular surface using a first lighting assembly and a second lighting assembly that each include a plurality of LEDs and a plurality of optical elements, each optical element overlying a respective one of the LEDs, the surface being divided into only a first portion and an adjacent non-overlapping second portion, the method comprising the steps of:
- directing light from the first lighting assembly toward the first portion of the surface such that the light from the first lighting assembly is directed across the entire first portion of the surface; and
at the same time, directing light from the second lighting assembly toward the second portion of the surface such that the light from the second lighting assembly is directed across the entire second portion of the surface;
wherein when all LEDs of the first lighting assembly are operating, the entire first portion of the surface is illuminated with an illumination level and a uniformity, and wherein failure of one or more LEDs of the first lighting assembly will cause the illumination level of light impinging the first portion of the surface to decrease while the uniformity of light impinging the first portion of the surface remains substantially the same; and
wherein when all LEDs of the second lighting assembly are operating, the entire second portion of the surface is illuminated with an illumination level and a uniformity, and wherein failure of one or more LEDs of the second lighting assembly will cause the illumination level of light impinging the second portion of the surface to decrease while the uniformity of light impinging the second portion of the surface remains substantially the same.
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Accused Products
Abstract
A method can be used to illuminate a surface that includes a number of non-overlapping portions. The method includes simultaneously illuminating each of the portions so that the surface is substantially uniformly lit. Each portion is illuminated by a respective lighting assembly. Each lighting assembly includes a plurality of LEDs and a plurality of optical elements proximate the plurality of LEDs. For each lighting assembly, when all LEDs of the lighting assembly are operating, the entire portion of the surface is illuminated with an illumination level and a uniformity. Failure of one or more LEDs of the lighting assembly will cause the illumination level of light impinging the portion of the surface to decrease while the uniformity of light impinging the portion of the surface remains substantially the same.
262 Citations
23 Claims
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1. A method of illuminating a rectangular surface using a first lighting assembly and a second lighting assembly that each include a plurality of LEDs and a plurality of optical elements, each optical element overlying a respective one of the LEDs, the surface being divided into only a first portion and an adjacent non-overlapping second portion, the method comprising the steps of:
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directing light from the first lighting assembly toward the first portion of the surface such that the light from the first lighting assembly is directed across the entire first portion of the surface; and at the same time, directing light from the second lighting assembly toward the second portion of the surface such that the light from the second lighting assembly is directed across the entire second portion of the surface; wherein when all LEDs of the first lighting assembly are operating, the entire first portion of the surface is illuminated with an illumination level and a uniformity, and wherein failure of one or more LEDs of the first lighting assembly will cause the illumination level of light impinging the first portion of the surface to decrease while the uniformity of light impinging the first portion of the surface remains substantially the same; and wherein when all LEDs of the second lighting assembly are operating, the entire second portion of the surface is illuminated with an illumination level and a uniformity, and wherein failure of one or more LEDs of the second lighting assembly will cause the illumination level of light impinging the second portion of the surface to decrease while the uniformity of light impinging the second portion of the surface remains substantially the same. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of illuminating a rectangular surface using a first lighting unit and a second lighting unit that each include a circuit board, a plurality of LEDs arranged on the circuit board, and a plurality of optical elements, wherein each optical element of the plurality of optical elements of the first and second lighting units overlies a respective one of the LEDs of the first and second lighting units, and wherein each optical element of the plurality of optical elements of the first and second lighting units is configured to redirect light from the respective one of the LEDs, the method comprising:
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directing light from the first lighting unit toward the surface so that the light from the first lighting unit is directed substantially uniformly across the entire surface and wherein if one or more LEDs of the plurality of LEDs of the first lighting unit fails, remaining LEDs of the plurality of LEDs of the first lighting unit still substantially uniformly illuminate the surface; and at the same time, directing light from the second lighting unit toward the surface so that the light from the second lighting unit is directed substantially uniformly across the surface, wherein if one or more LEDs of the plurality of LEDs of the second lighting unit fails, remaining LEDs of the plurality of LEDs of the second lighting unit still substantially uniformly illuminate the surface, wherein the directed light from both the first lighting unit and the second lighting unit is minimal beyond edges of the rectangular surface. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of illuminating a rectangular surface that includes a plurality of non-overlapping portions, the method comprising:
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simultaneously illuminating each of the portions so that the entire surface is substantially uniformly lit; wherein each portion is illuminated by a respective lighting assembly; wherein each lighting assembly includes a plurality of LEDs and a plurality of optical elements proximate the plurality of LEDs; and wherein, for each lighting assembly, when all LEDs of the lighting assembly are operating, the entire portion of the surface is illuminated with an illumination level and a uniformity, and wherein failure of one or more LEDs of the lighting assembly will cause the illumination level of light impinging the portion of the surface to decrease while the uniformity of light impinging the portion of the surface remains substantially the same. - View Dependent Claims (20, 21, 22, 23)
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Specification