led-based lighting method & a lighting fixture
First Claim
1. An LED based lighting method comprising the following steps:
- (1) Multiple LEDs are mounted on a lamp stand of an LED fixation plate and arranged in array;
(2) Each LED is disposed at its front with a lens device;
(3) The area to be illuminated is divided into multiple illuminated units in a number equal to that of those LEDs provided, and each LED corresponds to one illuminated unit; and
(4) A spot created by LED illumination merely covers up its corresponding illuminated unit through proper focusing of the lens device and selection of a proper LED illumination angle.
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Abstract
An LED based lighting method and a lighting fixture thereof includes multiple LEDs mounted on an LED lamp stand and arranged in array; a convex lens is disposed to a front of each LED; depending on the quantity of LEDs, the area to be illuminated is classified into multiples illuminated units with each corresponding to one LED; convex lenses of different focusing angles of beam of light are selected in case of a fixed focal length or the focal length of each lens device is adjusted so to select or regulate for a proper LED illuminating angle; no dark area exists and the brightness of the area illuminated is very consistent since the spot created by the LED illuminating beam of light after focusing by the convex lens over the area to be illuminated merely covers its corresponding illuminated unit; all the LEDs are mounted on the LED lamp stand properly spaced at intervals and a housing of each LED is totally exposed in the air to skip heat radiation device for lowering production cost, and making the LED streetlamp smaller and lighter, and easier installation and service.
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Citations
23 Claims
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1. An LED based lighting method comprising the following steps:
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(1) Multiple LEDs are mounted on a lamp stand of an LED fixation plate and arranged in array; (2) Each LED is disposed at its front with a lens device; (3) The area to be illuminated is divided into multiple illuminated units in a number equal to that of those LEDs provided, and each LED corresponds to one illuminated unit; and (4) A spot created by LED illumination merely covers up its corresponding illuminated unit through proper focusing of the lens device and selection of a proper LED illumination angle. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A lighting fixture of an LED based lighting method comprising A lighting fixture using the LED based lighting method is comprised of a lid, multiple LEDs, and an LED stand;
- the LED stand is disposed in the lid and those LEDs disposed thereon are arranged in array;
a lens device is disposed to a front of the LED;
a central LED on the LED stand illuminates downward and vertically to the ground;
LEDs on both sides are in sequence arranged either in radius outwardly or in convergence inwardly in symmetry;
should all LEDs other than the central one be distributed in symmetry to the central LED in radius, the relation between the illumination length, X, of each LED and the included angle a is described in a formula of X=(N−
M)/sin a;
wherein N is the range between a center of an illuminated unit that a certain LED corresponds to and the center of the illuminated unit that the central LED corresponds to; and
M, the distance between that LED and the central LED; and
the included angle a is solved by operating the formula and the illumination angle of the LED is determined accordingly;
if all the LEDs in sequence are arranged inwardly in convergence and in symmetry to the central LED;
the relation between the illumination length L of each LED and the included angle a is expressed in a formula;
L=(y+y1)/sin a;
wherein, y is the range between a center of an illuminated unit that a certain LED corresponds to and the center of the illuminated unit that the central LED corresponds to; and
y1, the distance between that LED and the central LED; and
the included angle a is solved by operating the formula and the illumination angle of the LED is determined accordingly. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
- the LED stand is disposed in the lid and those LEDs disposed thereon are arranged in array;
Specification