| 摘要 |
A unique pattern arrangement, placement density, and wattage sizing of LEDs in a line voltage Linear Task Light produces uniform illumination with negligible point-source shadowing typically seen in other similar LED task lights. A desired energy code compliant 7½ Watts per foot is achieved using a greater number and smaller sized LEDs than in competitor's products, resulting in a better price-point efficiency in terms of dollars per Watt ($/W). The resulting product meets all Leed certification requirements, is California Title 24 compliant, and uses proximity sensing circuitry to further reduce energy consumption by shutting off when the illuminated area is vacant for a period of time. The LED Task Light disclosed is capable of higher illumination when needed, without sacrificing energy code compliancy through the use of timing circuitry to automatically reduce illumination intensity and corresponding energy consumption after a preset time interval. |
| 主权项 |
1. An LED Task Lamp for achieving uniform illumination of a work surface and decreasing multiple point-source shadowing comprising:
One or more high-power LEDs, and control and driving circuitry powering said LEDs, and a thermally conductive enclosure providing a path to transfer heat from said LEDs through said enclosure and into surrounding air,
said enclosure being substantially greater in length than width or height; and a control panel providing input to said control and driving circuitry, said control panel comprising:
a selector providing means for manually selecting one of multiple output illumination intensities of said LEDs, anda proximity sensing device sensing the presence or absence of a person within a pre-set distance of said LED lamp;whereinsaid proximity sensing device
causes said LED lamp to enter a power saving, lower illumination mode after a preset time interval during which no person is detected within a preset distance of said LED lamp, andcauses said LED lamp to return to a higher illumination mode upon detecting a person entering a preset proximity to said LED lamp; and wherein said LEDs
are arranged in two or more linear rows, alternating in their placement within said linear rows, such that a staggered pattern is achieved, with any three adjacent LEDs forming a triangle. |
