US 9,812,043 B2
Light assembly for providing substantially uniform illumination
David Siucheong Auyeung, Carrollton, TX (US); William Y. Hall, Dallas, TX (US); and Simon Magarill, Cincinnati, OH (US)
Assigned to ULTRAVISION TECHNOLOGIES, LLC, Dallas, TX (US)
Filed by Ultravision Technologies, LLC, Dallas, TX (US)
Filed on Feb. 24, 2015, as Appl. No. 14/630,500.
Application 14/630,500 is a continuation of application No. 13/836,517, filed on Mar. 15, 2013, granted, now 8,974,077.
Claims priority of provisional application 61/677,346, filed on Jul. 30, 2012.
Prior Publication US 2015/0167923 A1, Jun. 18, 2015
Int. Cl. F21S 4/00 (2016.01); G09F 13/22 (2006.01); F21K 9/60 (2016.01); F21S 6/00 (2006.01); F21V 5/00 (2015.01); F21V 29/00 (2015.01); F21V 29/15 (2015.01); F21V 29/503 (2015.01); F21V 29/74 (2015.01); F21V 29/76 (2015.01); F21V 33/00 (2006.01); G09F 13/02 (2006.01); G09F 15/00 (2006.01); F21W 131/40 (2006.01); F21Y 101/00 (2016.01); F21Y 105/10 (2016.01); F21Y 105/12 (2016.01); F21Y 115/10 (2016.01); G02B 19/00 (2006.01)
CPC G09F 13/22 (2013.01) [F21K 9/60 (2016.08); F21S 6/006 (2013.01); F21V 5/007 (2013.01); F21V 29/00 (2013.01); F21V 29/15 (2015.01); F21V 29/503 (2015.01); F21V 29/74 (2015.01); F21V 29/763 (2015.01); F21V 33/00 (2013.01); G09F 13/02 (2013.01); G09F 15/00 (2013.01); F21W 2131/40 (2013.01); F21Y 2101/00 (2013.01); F21Y 2105/10 (2016.08); F21Y 2105/12 (2016.08); F21Y 2115/10 (2016.08); G02B 19/0014 (2013.01); G02B 19/0028 (2013.01); G02B 19/0061 (2013.01); G02B 19/0066 (2013.01); G09F 2013/222 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A method of illuminating visual media content on a billboard display 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 the steps of:
directing light from the first lighting unit toward a portion of the billboard display surface that extends from an edge of the billboard display surface, wherein the light from the first lighting unit is directed across the entire portion of the billboard display 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 illuminate the entire portion of the billboard so that all of the visual media content on the portion of the billboard display surface is visible without any additional light; and
at the same time, directing light from the second lighting unit toward the portion of the billboard display surface such that the light from the second lighting unit is directed across the entire portion of the billboard display 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 illuminate the entire portion of the billboard so that all of the visual media content on the portion of the billboard display surface is visible without any additional light;
wherein each optical element of the plurality of optical elements comprises:
a first outer boundary, a second outer boundary opposite the first outer boundary, a third outer boundary connecting the first outer boundary and the second outer boundary, a fourth outer boundary opposite the third outer boundary, and a central region halfway between the first outer boundary and the second outer boundary;
a first element with a convex outer surface extending from the first outer boundary toward the central region and having a peak located between the central region and the first outer boundary, the peak being spaced from the central region, the peak of the first element being vertically spaced from the circuit board on which the respective LED is arranged by a first distance;
a second element with a convex outer surface extending from the second outer boundary toward the central region and having a peak located between the central region and the second outer boundary, the peak being spaced from the central region, the peak of the second element being vertically spaced from the circuit board on which the respective LED is arranged by a second distance, wherein a portion of the convex outer surface of the first element intersects with a portion of the convex outer surface of the second element at an angle in a region between the first element and the second element;
a third element disposed between the third outer boundary and a region halfway between the third outer boundary and the fourth outer boundary, wherein the third element has a peak that is vertically spaced from the circuit board on which the respective LED is arranged by a third distance that is greater than the first distance and is greater than the second distance; and
a fourth element positioned proximate the respective LED, wherein the first, second and third elements are positioned above the fourth element, the fourth element having a first boundary enclosing a first surface adjacent the respective LED and a second boundary enclosing a second surface adjacent the first, second and third elements, the first boundary being smaller than the second boundary.