LED lamp

摘要

A LED lamp includes a number of lenses each of which includes a light emitting surface and a plurality of shades mounted on the light emitting surface. Each of the shades includes a hole whose sectional area in radial direction is equal to that of the light emitting surface. An axial height of the hole follows the formula;Hφ=ϕ⁢maxtan⁢⁢θmax,
wherein Hφ is the axial height of the hole, φmax is a diameter value of the light emitting surface, and θmax is an output angle of the lens. Accordingly, a work area of the anti-glare LED lamp can be extend the most thereof since the shades block the stray light of a glare area of the LED lamp and strictly separates the work area from the glare area, and no stray light shot into eye in any areas. Therefore, the anti-glare LED lamp can achieve light distribution as designed without glare under cooperation of the lenses and the shades.

主权项

1. An LED lamp comprising:
a house; a light module mounted in the house, the light module comprising a printed circuit board, and a number of LEDs electrically connected to the printed circuit board; and a light frame disposed in front of the house; a lens module received in the house and disposed in front of the light module, the lens module comprising a lens base, and a number of lenses disposed on the lens base, the lenses being responsive to the LEDs, and each of the LEDs being disposed on the bottom of the lenses respectively; a shade module received in the house and disposed in front of the lens module, the shade module comprising a shade base and a plurality of shades disposed on the shade base, the shades being responsive to the lenses, and a bottom of the shades touching the lens base, wherein each of the shades comprises a hole and area of the section of the hole is the same as that of a big end of the lens, the axial height of the hole must meet the following formula:Hφ=ϕ⁢maxtan⁢⁢θmax,wherein φmax is a maximum diameter of the light emitting surface, θmax is an maximum output angle between light path of light emitted from the outermost boundary of the light emitting surface and the optical axis of the lens.